TY - CHAP A1 - Brosig, Christoph A1 - Westner, Markus A1 - Strahringer, Susanne ED - Borštnar, Mirjana Kljajić T1 - Linking IT assets and competitive advantage - IT capabilities of servitized business models T2 - 34th Bled eConference Digital Support from Crisis to Progressive Change: June 27 - 30, 2021, Online: Conference Proceedings N2 - This paper connects research from business model innovation and information systems by exploring critical IT capabilities for servitized business models. The adoption of servitized business models is a major business model innovation strategy. At the same time, digitalization drives the evolution of IT capabilities at these business models. Scholars argue that it remains unclear how IT capabilities enable servitized business models to build a competitive advantage by achieving cost advantages or differentiation. This paper explores IT capabilities that enable building a competitive advantage for servitized business models based on a qualitative analysis of multiple published case studies. The authors identify configurations of IT capabilities among servitized business models. The findings contribute to servitization research by exploring IT capabilities and how they are combined among servitized business models. The insights help practitioners deploy digital technologies and IT assets effectively as building blocks of IT capabilities to advance their servitized business model. KW - resource-based view KW - IT capability KW - digital servitization KW - competitive advantage KW - Geschäftsmodell KW - Innovation KW - Hybrides Leistungsbündel KW - Informationstechnik Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-20158 UR - https://press.um.si/index.php/ump/catalog/book/581 SN - 978-961-286-485-9 SP - 111 EP - 123 ER - TY - INPR A1 - Weiß, Martin Georg T1 - Optimization of Cartesian Tasks with Configuration Selection N2 - A basic task in the design of an industrial robot application is the relative placement of robot and workpiece. Process points are defined in Cartesian coordinates relative to the workpiece coordinate system, and the workpiece has to be located such that the robot can reach all points. Finding such a location is still an iterative procedure based on the developers' intuition. One difficulty is the choice of one of the several solutions of the backward transform of a typical 6R robot. We present a novel algorithm that simultaneously optimizes the workpiece location and the robot configuration at all process points using higher order optimization algorithms. A key ingredient is the extension of the robot with a virtual prismatic axis. The practical feasibility of the approach is shown with an example using a commercial industrial robot. KW - optimization KW - Intralogistik KW - Industrieroboter KW - Programmgenerierung KW - Nichtlineare Optimierung KW - robotics Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-20176 UR - https://arxiv.org/pdf/1811.07137.pdf ER - TY - CHAP A1 - Falter, Thomas A1 - Goldberg, Boris A1 - Günther, Swen A1 - Steffens, Oliver ED - Borowski, Esther ED - Cernavin, Oleg ED - Hees, Frank ED - Joerißen, Theresa T1 - Transfererfolg messbar machen BT - Von der Idee über die Implementierung zur Anwendung mit Transferindikatorik im Forschungsbetrieb T2 - Erfolgreicher Transfer in der Arbeitsgestaltung N2 - Hochschulen für angewandte Wissenschaften (HAW) kommt als regionalen Innovationstreibern eine gesellschaftliche Verantwortung durch ihre Zusammenarbeit mit Unternehmen und Gesellschaft zu. Diese Zusammenarbeit geschieht im Rahmen von Aktivitäten des Wissens- und Technologietransfers. Die Beurteilung des Erfolgs dieser Transferaktivitäten verursacht jedoch regelmäßig Schwierigkeiten, da geeignete Indikatoren zur Erfolgsmessung fehlen. Im Rahmen des vom Bundesministerium für Bildung und Forschung (BMBF) geförderten Verbundforschungsprojektes Transfer_i wurde ein Modell zur Objektivierung und Messung von Forschungsleistung, forschungsbasiertem Transfer sowie dessen Umsetzung am Markt in Form von Innovationen erarbeitet. Mit dem Forschungsprojekt wurden kausale Zusammenhänge für das Gelingen von Transfer identifiziert und daraufhin entsprechende Indikatoren definiert, um auf dieser Basis die Steuerung von Transferprozessen zu ermöglichen. In diesem Beitrag werden zwei im Projekt Transfer_i entwickelte Modelle und Indikatoren vorgestellt, die die Voraussetzungen für einen erfolgreichen Transferprozess abbilden können. Auf dieser Grundlage zeigen wir anhand eines Projekts (MAGGIE) der Ostbayerischen Technischen Hochschule (OTH) Regensburg mit mehreren regionalen Partnern, wie die vorher definierten Modelle und Indikatoren in einem konkreten Anwendungsfall verwendet werden können. Abschließend beschreiben wir die erforderlichen Rahmenbedingungen für die erfolgreiche Umsetzung von Transfer an Hochschulen und wie darauf bezogene Indikatoren effektiv eingeführt werden können. KW - Angewandte Forschung KW - Transfer Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-67568 UR - https://www.waxmann.com/index.php?eID=download&buchnr=4808 SP - 173 EP - 187 PB - Waxmann CY - Münster ER - TY - CHAP A1 - Blaabjerg Karlsen, Tobias A1 - Decuzar de Castro, Karl Jhon A1 - Pipars, Emils A1 - Abdel Qader, Iyad Ahed Abdelrahman A1 - Ilinca Sainz, Jose Dumitru A1 - Srugys, Simas A1 - Niebuhr, Oliver ED - Baumann, Timo T1 - In Tune With In-Poco? A New Device for Analyzing and Training the Interplay of Body Posture and Charismatic Speech Prosody T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Our paper introduces a new technology for posture research and training: the INteractive POsture COrrector, IN-POCO. The device warns its users about unfavorable postures when speaking (e.g., sitting in video conferences) and is thus suitable as an aid for rhetoric trainers. In addition, IN-POCO can also collect time-aligned posture and speech signals for researching prosody-posture relationships in the speech sciences. We outline the motivation for the development of IN-POCO and describe the key technical specifications and operational characteristics. The paper concludes with a pilot experiment in which we provide initial evidence that, for a communicative (public) speaking task, posture does indeed affect speech prosody in gender-specific ways – in line with claims of rhetoric trainers and guidebooks, and such that an unfavorable (e.g,, humped) posture can be assumed to reduce the speaker's vocal charisma. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70900 SN - 978-3-95908-325-6 SP - 132 EP - 140 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Frohnmaier, Mariano A1 - Freisinger, Steffen A1 - Holt, Madeline Faye A1 - Georges, Munir ED - Baumann, Timo T1 - NoiSLU: a Noisy speech corpus for Spoken Language Understanding in the Public Transport Domain T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - The use of local public transport requires the barrier-free purchase of a ticket. Travellers who are not proficient in the local language benefit from a multilingual human(ticket)machine voice interaction. This paper presents a nearly parallel audio dataset with 13218 annotated user queries from 20 speakers for English, German and Dutch. The domain-specific speech corpus can be understood as an evaluation dataset for future research in Spoken Language Understanding (SLU) and thus, it enables researches to improve the quality of human-machine interaction applications. Furthermore, we compare the SLU performance of different compositions of Automatic Speech Recognition (ASR) and Natural Language Understanding (NLU) models in baseline experiments on different test datasets. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70848 SN - 978-3-95908-325-6 SP - 86 EP - 93 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Kettler, Benedict A1 - Hillmann, Stefan ED - Baumann, Timo T1 - Supervised vs. Zero-Shot Learning Automatic Classification of Comments on Educational Videos Using Pre-Trained Language Models T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Despite the potential of AI, only a small percentage of small and medium-sized enterprises (SMEs) are adopting it due to data issues, expertise gaps, and implementation barriers. Zero-shot learning offers a promising approach for SMEs by minimizing these obstacles. This paper explores the use of zero-shot learning in a real-world NLP classification task on online comments (comparable with intent classification tasks) from the e-learning platform Sofatutor. While finetuning has achieved high accuracy (82.3–86.5%), zero-shot models have shown lower performance (39.3–61.4%) due to different label selection, grouping of different scenarios in one class and the type of classification task. Even if the current accuracy is not sufficient for practical application, pre-filtering the data using zeroshot learning might be a promising option for SMEs. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70928 SN - 978-3-95908-325-6 SP - 149 EP - 156 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Rajasekhar, Anjana A1 - Leschanowsky, Anna A1 - Peters, Nils ED - Baumann, Timo T1 - Towards Speech Privacy Assessment for Voice Assistants: Exploring Subjective and Objective Measures for Babble Noise T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - The growing prevalence of voice assistants has sparked privacy concerns with respect to content privacy and potential human-based attacks such as eavesdropping which make users feel uncomfortable utilizing them in public. To address these challenges, understanding human privacy perceptions in acoustic environments becomes paramount. This understanding can empower voice assistants to accurately quantify privacy perceptions, adapt conversational patterns, and ultimately enhance human-machine interaction. This study draws inspiration from human-tohuman interactions and previous research on acoustic privacy, to quantify privacy perceptions in environments characterized by babble noise. The primary objective is a comprehensive evaluation of both objective and subjective measures to quantitatively capture privacy perceptions in acoustic environments. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70885 SN - 978-3-95908-325-6 SP - 116 EP - 123 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Huber-Liebl, Markus A1 - Wirsching, Günther ED - Baumann, Timo T1 - Ein quantenlogisch motivierter Ansatz zur Verarbeitung von Äußerungs‐Bedeutungspaaren T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Wir repräsentieren eine Bedeutung als Liste von Mustersignalen, und unser Ziel ist es, ein weiteres ankommendes Signal damit zu vergleichen. Die Quantenlogik motiviert die Verwendung von Orthogonalprojektoren, um die gesuchte Ähnlichkeit als Projektionswahrscheinlichkeit darzustellen. Die Ergebnisse des quantenlogischen Verfahrens hängen davon ab, in welcher Weise die Signale vorverarbeitet werden. In diesem Aufsatz untersuchen und diskutieren wir vier verschiedene Möglichkeiten der Vorverarbeitung. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70857 SN - 978-3-95908-325-6 SP - 94 EP - 101 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Jahnke, Thorben Frank A1 - Sonnen, Corinna A1 - Walther, Mathias ED - Baumann, Timo T1 - Konzept und Evaluation eines Softwaresystems zur Unterstützung der CRM-basierten Sprechwirkungsuntersuchung T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Das Continuous-Response-Measurement-Verfahren bildet durch die kontinuierliche Bewertungsmöglichkeit eine wichtige Ergänzung zu den gängigen Methoden im Repertoire der Wirkungsforschung. Um diesen Mehrwert voll ausschöpfen zu können, wird als Verfahrensoptimierung die Entwicklung einer Softwarelösung vorgestellt. Die Überprüfung des optimierten CRM-Verfahrens erfolgt mittels eines Anwendungsfalls aus der sprechwissenschaftlichen Telekommunikationsforschung im Rahmen eines User-Acceptance-Tests. Dabei wird die Funktionalität und Bedienerfreundlichkeit der entwickelten CRM-Softwarelösung unter Beachtung der für die Sprechwirkungsforschung relevanten Kriterien in Form einer A-BStudie getestet. Das Gesamtergebnis des User-Acceptance-Tests fällt für die Software Evalue positiv aus. Mit Hilfe der Verfahrensoptimierung des CRM-Verfahrens ist eine variabel einsetzbare und damit vielfältig nutzbare CRM-Softwarelösung entstanden. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70893 SN - 978-3-95908-325-6 SP - 124 EP - 131 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Venkateswaran, Siddarth A1 - Böck, Ronald ED - Baumann, Timo T1 - Can Language Models Behave Like Wine Sommeliers? – Using Multiple Agents To Evaluate The Quality of Wine Descriptors Generated By Llama 2 T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Wines are complex beverages whose taste can be described either numerically or textually, with the former involving the rating of the intensities of different aroma characteristics often with the help of a wine tasting wheel, and the latter with the help of crisp terms often in a poetic fashion. These are often done with the help of wine sommeliers who with one sniff can describe the wine. Usually, each sommelier has a unique style when it comes to textually describing a wine, research has shown that such differences have no negative impact in correctly classifying wines on the basis of their color, grape variety, region etc. Given the recent advancements in the field of Natural Language Processing, especially with the emergence of Large Language Models, we aim to check the capability of Llama 2 in its ability to generate texts pertaining to a specific color of a wine, given a list of aroma intensities as input prompts. In our experiments, we relied on data from Meininger and Falstaff, and on a combination of domain adaptation and pseudo-labeling techniques to create the corpus to train the Llama 2 model on. Also, we relied on a voting scheme of three differently trained classifiers to evaluate the wine-color specific text generation capabilities of Llama 2. Additionally, we employed the services of domain experts to evaluate the quality of a sample set of texts that was generated by Llama 2. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70911 SN - 978-3-95908-325-6 SP - 141 EP - 148 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Birkholz, Peter A1 - Zhang, Xinyu ED - Baumann, Timo T1 - An Investigation of Acoustic Features of the Lower Vocal Tract for Speaker Recognition T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Speaker recognition systems often use mel-scaled cepstral coefficients (MFCCs) as main features. In contrast to MFCCs, Godoy et al. (2015) proposed a different type of short-term spectral analysis that provides features related to the lower vocal tract (LVT). They are calculated as the ratio of the acoustic shorttime spectra during the closed and open phases of the glottal oscillation cycles based on a pitch-synchronous analysis. These features were suggested to be particularly speaker-specific and might therefore be suitable to substitute or complement MFCCs in speaker recognition systems. The present study investigated the benefit of these features in an i-vector-based speaker recognition system. Using the LVT features alone, the system achieved a speaker recognition rate of 92.3% with 63 enrolled speakers. When the LVT features were fused with conventional MFCC features, the recognition rate was about equal to the recognition rate using MFCC features alone (> 98%). Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70870 SN - 978-3-95908-325-6 SP - 108 EP - 115 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Draxler, Christoph A1 - Pömp, Julian ED - Baumann, Timo T1 - Octra Backend - Eine skalierbare Infrastruktur für Transkriptionsprojekte T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Octra Backend ist eine portable web-basierte Infrastruktur für Transkriptionsprojekte, die lokal im Feld oder geschützten Bereichen, im begrenzten Intranet oder weltweit erreichbar im Internet eingesetzt werden kann. Entwicklungsziele waren die Gewährleistung möglichst hoher Sicherheitsanforderungen, eine gute Skalierbarkeit sowie eine einfache Installation auch ohne Administratorrechte. Octra Backend ist in Node.js implementiert und für MacOS, Windows und Linux verfügbar. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70867 SN - 978-3-95908-325-6 SP - 102 EP - 107 PB - TUDpress CY - Dresden ER - TY - GEN ED - Baumann, Timo ED - Siegert, Ingo T1 - Sprachassistenten: Anwendungen, Implikationen, Entwicklungen N2 - Der zweite ITG-Workshop „Sprachassistenten – Anwendungen, Implikationen, Entwicklungen“ fand am 5. März 2024 in Regensburg statt. Er bot eine organisatorische und inhaltliche Fortführung des ersten Workshops vor vier Jahren in Magdeburg 2020. Auch in diesem Jahr war er wieder der Konferenz Elektronische Sprachsignalverarbeitung angegliedert. Auf dem Workshop wurden vielfältige und interdisziplinäre Beiträge in eingeladenen Vorträgen und als eingereichte Poster präsentiert. Durch die gute Mischung von Beitragenden sowohl aus der Hochschullandschaft als auch aus der Industrie wurden die verschiedensten Aspekte anwendungsnah diskutiert. KW - Sprachassistenzsysteme KW - Digitaler Sprachassistent Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-71292 CY - Regensburg ER - TY - CHAP A1 - Mousavi, Neda A1 - Saeed Sarfjoo, Seyyed A1 - Grawunder, Sven ED - Baumann, Timo T1 - Unsupervised emotional pattern recognition using rhythmic and vocal features T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - In this study, we address the complex dynamics of emotional speech and comprehensively examine the integration of rhythmic and vocal features to recognize emotional patterns. Our exploration is conducted using two German emotional corpora: VMEmo and EmoDB. Employing a combination of supervised methods (here linear discriminant analysis, LDA) and unsupervised techniques (here k-means clustering), we aim to uncover nuanced patterns within the emotional speech in these corpora. The application of LDA highlights salient patterns across different feature sets and focuses on the classification of speakers and prosodic characteristics. In addition, k-means clustering uncovers latent structures that reveal subtle mapping between emotions and speech behavior. Our results suggest that it is possible to cluster data based on prosodic behaviors that are influenced by emotional changes. Although precise mapping to the actual clusters derived from emotional labels could not be fully achieved, the results nonetheless reveal a moderate level of success in this investigation. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-71026 SN - 978-3-95908-325-6 SP - 233 EP - 240 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Ibrahim, Omnia A1 - Yuen, Ivan A1 - Xue, Wei A1 - Andreeva, Bistra A1 - Möbius, Bernd ED - Baumann, Timo T1 - Listener-Oriented Consequences of Predictability-Based Acoustic Adjustment T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - This paper investigated whether predictability-based adjustments in production have listener-oriented consequences in perception. By manipulating the acoustic features of a target syllable in different predictability contexts in German, we tested 40 listeners’ perceptual preference for the manipulation. Four source words underwent acoustic modifications on the target syllable. Our results revealed a general preference for the original (unmodified) version over the modified one. However, listeners generally favored the unmodified version more when the source word had a higher predictable context compared to a less predictable one. The results showed that predictability-based adjustments have perceptual consequences and that listeners have predictability-based expectations in perception. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70984 SN - 978-3-95908-325-6 SP - 196 EP - 202 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Ranzenberger, Thomas A1 - Bocklet, Tobias A1 - Freisinger, Steffen A1 - Georges, Munir A1 - Glocker, Kevin A1 - Herygers, Aaricia A1 - Riedhammer, Korbinian A1 - Schneider, Fabian A1 - Simic, Christopher A1 - Zakaria, Khabbab ED - Baumann, Timo T1 - Extending HAnS: Large Language Models For Question Answering, Summarization, And Topic Segmentation In An ML-based Learning Experience Platform T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - The use of chatbots based on large language models (LLMs) and their impact on society are influencing our learning experience platform Hochschul-Assistenz-System (HAnS). HAnS uses machine learning (ML) methods to support students and lecturers in the online learning and teaching processes [1]. This paper introduces LLM-based features available in HAnS which are using the transcript of our improved Automatic Speech Recognition (ASR) pipeline with an average transcription duration of 45 seconds and an average word error rate (WER) of 6.66% on over 8 hours of audio data of 7 lecture videos. A LLM-based chatbot could be used to answer questions on the lecture content as the ASR transcript is provided as context. The summarization and topic segmentation uses the LLM to improve our learning experience platform. We generate multiple choice questions using the LLM and the ASR transcript as context during playback in a period of 3 minutes and display them in the HAnS frontend. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-71032 SN - 978-3-95908-325-6 SP - 219 EP - 224 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Kinoshita, Keisuke A1 - Delcroix, Marc A1 - Gannot, Sharon A1 - Habets, Emanuël A. P. A1 - Haeb-Umbach, Reinhold A1 - Kellermann, Walter A1 - Leutnant, Volker A1 - Maas, Roland A1 - Nakatani, Tomohiro A1 - Raj, Bhiksha A1 - Sehr, Armin A1 - Yoshioka, Takuya ED - Watanabe, Shinji ED - Delcroix, Marc ED - Metze, Florian ED - Hershey, John R. T1 - The REVERB Challenge: A Benchmark Task for Reverberation-Robust ASR Techniques T2 - New Era for Robust Speech Recognition N2 - The REVERB challenge is a benchmark task designed to evaluate reverberation-robust automatic speech recognition techniques under various conditions. A particular novelty of the REVERB challenge database is that it comprises both real reverberant speech recordings and simulated reverberant speech, both of which include tasks to evaluate techniques for 1-, 2-, and 8-microphone situations. In this chapter, we describe the problem of reverberation and characteristics of the REVERB challenge data, and finally briefly introduce some results and findings useful for reverberant speech processing in the current deep-neural-network era. Y1 - 2017 SN - 978-3-319-64679-4 U6 - https://doi.org/10.1007/978-3-319-64680-0_15 VL - 27 SP - 345 EP - 354 PB - Springer CY - Cham ER - TY - CHAP A1 - Kisser, Lea A1 - Busch, Matthias A1 - Siegert, Ingo ED - Baumann, Timo T1 - Review of Usage and Potentials of Conversational Interfaces at Universities and in Students Daily Lifes T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - The continuous advancement of digitization extends beyond educational institutions, giving rise to numerous innovations, particularly in the realm of study information [1]. One avenue for incorporating digital methodologies involves leveraging conversational agents (CAs) [2], serving as interactive interfaces bridging the gap between humans and computers. In the broader context, conversational agents are gaining prominence, offering several benefits to their users. The overarching goal is to comprehensively assist users through these intelligent systems. Consequently, exploring existing university chatbots becomes imperative to discern the areas where they excel. This research aims to scrutinize diverse chatbot systems, delving into their use cases and the challenges they encounter, employing a systematic review. Here it turns out that chatbots support universities the most in the fields of administration, e-learning and mental health. Furthermore, the study will investigate practical experiences on the potential applications and implementation of these systems in university settings, incorporating insights from an online survey and interviews, both made with experts. Here it comes to conclusion that preparation in relation to a chatbot implementation is the key factor to success. Otherwise, a failed system is nearly impossible to be saved, once users lost trust in the system. Therefore, carefully made preparations in the technical and organisational field are necessary to provide a helpful assistant. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70789 SN - 978-3-95908-325-6 SP - 38 EP - 45 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Walther, Mathias A1 - Zeuner, Elisabeth A1 - Rykova, Eugenia ED - Baumann, Timo T1 - Interaktionsverhalten eines Avatars im digitalen sprachtherapeutischen Setting T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Die Therapie-App aphaDIGITAL wird im Rahmen eines Forschungsprojekts entwickelt, um Menschen mit Aphasie im häuslichen Umfeld zu unterstützen. Das Projekt kombiniert bewährte Therapiemethoden mit digitalen Technologien, einschließlich künstlicher Intelligenz und einem interaktiven Avatar namens Eva. Dieser Artikel betrachtet die Analyse und Entwicklung der Interaktionsmechanismen, die für eine digitale Assistenz von Aphasietherapie den größten Einfluss haben. Es wurden dazu reale Therapiesitzungen zwischen sprachgeschädigten Menschen und ihren Therapeuten konversationsanalytisch nach spezifischen Merkmalen untersucht. Darauf aufbauend wurde durch manuelle Animation ein prototypisches Mundbild modelliert und ein eigenes Artikulationssystem konzipiert, um ein entsprechend authentisches Modell der deutschen Artikulations- und Koartikulationsmuster abzubilden. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70774 SN - 978-3-95908-325-6 SP - 30 EP - 37 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Kany, Valentin A1 - Trouvain, Jürgen ED - Baumann, Timo T1 - Computergestützte Bestimmung des Sprechflusses bei Vorschulkindern T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Die vorliegende Studie untersucht, inwiefern sich die in der Phonetik verbreiteten Skripte zur automatisierten Feststellung von verschiedenen Aspekten des Sprechflusses von de Jong et al. zur Beurteilung des Sprachstands bei Kindern eignen und in welcher Art und Weise die Methodik angepasst werden könnte. Dazu wurden Sprachdaten von Vorschulkindern mit Deutsch als Muttersprache bzw. als Zweitsprache mithilfe eines Serious Game zur Sprachstandserhebung elizitiert. Die Audiodaten wurden bezüglich Artikulationsrate, Pausen und Füllpartikeln sowohl automatisiert durch die Skripte als auch manuell annotiert. Die Ergebnisse zeigen, dass sich die Skripte zur Ermittlung der Artikulationsrate mit einer relativ hohen Übereinstimmung mit der manuellen Ermittlung zur Verwendung in Sprachstandserhebungsverfahren eignen. Auch die automatische Erkennung von Sprechpausen weist einen hohen Precision-Wert auf und könnte als Instrument in Sprachstandserhebungen verwendet werden. Eine solche Verwendung würde mit einer Erweiterung um die hier vorgestellte manuelle Methode zum Annotieren von disfluenten und nicht disfluenten Pausen profitieren. Bei den Füllpartikeln stellte sich die automatisierte Klassifizierung hingegen als weniger geeignet heraus. Hier wurde keine hohe Übereinstimmung mit der menschlichen Annotation festgestellt. Um in der Praxis Verwendung finden zu können, muss diese Methode noch erweitert werden, zum Beispiel durch Miteinbeziehen der Pausenerkennung. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70819 SN - 978-3-95908-325-6 SP - 62 EP - 69 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Eliseeva, Uliana A1 - Yuen, Ivan A1 - Möbius, Bernd ED - Baumann, Timo T1 - Perception of Formant Distortion in German Words and Non-words T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Concatenative text-to-speech (TTS) systems remain a widely used cheaper alternative to neural TTS systems. Yet concatenation of prerecorded units entails some drawbacks, such as spectral distortion, the perceptual consequences of which remain unclear. In an attempt to bridge this gap, our study focused on the effect of spectral distortion in vowel formants on perceived speech quality in naturally-read manipulated German words as well as non-words. More specifically, we explored the distortion effect on a varying number of affected formants, at different magnitude and directionality in two corner vowels /a:/ and /i:/. The results indicate that single formant manipulations have a less pronounced effect on the listeners’ perception compared to multiple formant perturbations. The threshold at which the distortion became generally audible was estimated to lie between 0.4 and 1.0 bandwidth. The directionality of the distortion was not found to be significant. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70793 SN - 978-3-95908-325-6 SP - 46 EP - 53 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Kuhn, Johannes A1 - Wolff, Matthias A1 - Borislavov, Borislav ED - Baumann, Timo T1 - Epsilon-Verarbeitung bei minimalistischen Grammatiken für Zahlen T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Um bei Minimalistischen Grammatiken (MG) Übergenerierung zu vermeiden, kann man Einträge mit leeren Exponenten (ε-Einträge) verwenden. Ein Eintrag besteht aus einem Exponenten, der die Äußerung oder Schrift eines Wortes repräsentiert, einer Merkmalsliste, welche die Syntax kodiert und einem λ-Ausdruck, der die Semantik repräsentiert. Leere Einträge führen allerdings zu einer schlechteren Verwendbarkeit der Grammatik für das Parsen. Die vorliegende Arbeit wird ein Umformungsalgorithmus für MGs vorstellen, sodass die Anzahl der ε-Einträge verringert werden kann, um sie wieder für Parser verwendbar zu machen. Hierzu werden die ε-Einträge mit den anderen Einträgen vorverarbeitet und dadurch neue Einträge geschaffen. Die nun überflüssigen ε-Einträge können dann problemlos entfernt werden. Der Algorithmus wurde anhand von über 260 Zahlwortgrammatiken getestet. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70830 SN - 978-3-95908-325-6 SP - 78 EP - 85 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Höge, Harald ED - Baumann, Timo T1 - The Use of Temporal Features in Cortical Segmentation of Syllables T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - There is high confidence for the hypothesis that in speech perception the cycles of a θ-oscillation segment the auditory signal into syllables [8]. Yet the functionality of the oscillator generating the θ-oscillation is unknown. We follow the finding that, within an auditory scene, speech is perceived as a stream given by temporal coherence [12]. We work with the hypotheses that the θ-oscillator is driven by temporal features providing this coherence. We propose a new temporal feature called O-distance, which detects the onset of a syllable - the starting point to of a θ-cycle–triggered by the temporal distance from to to the instance of the maximal rise of the loudness curve of the vowel. To extract to from the auditory signal, we use the statistical properties of this distance based on the C-center hypothesis [25], which predicts a close temporal relation of the onset consonants to the onset of a vowel. The statistics are derived from reference O-distance extracted from an articulatory database, where the minima and maxima of the loudness are related to maxima and minima of the lower incisor and tongue tip. To judge the quality of the O-distance extracted from the auditory signal, we regard the temporal deviation of the O-distance to the reference O-distance. Currently we achieve a mean deviation of 34ms. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70823 SN - 978-3-95908-325-6 SP - 70 EP - 77 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Schaffer, Stefan A1 - Schwaetzer, Eva A1 - Ruß, Aaron A1 - Gustke, Oliver ED - Baumann, Timo T1 - Chatbot in the Museum – A Field Study of User Experience and Modality Usage T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - This paper describes a field study conducted with a museum chatbot at the Städel Museum Frankfurt. The chatbot uses the BERT language model for natural language processing and can be operated via touchscreen as well as via speech input. Prior to the study, hypotheses regarding the user experience of the system were formulated and a system-specific questionnaire was designed, which was used to inquire (among other things) about the perceived quality of the speech output and the frequency of audio guide use in museums. During the interaction with the chatbot, log data was collected and stored in the back-end system. The results show a significant correlation between perceived speech quality and user experience. An exploratory data analysis revealed that participants who used only speech input rated the system as significantly more stimulating than participants who used only touch input. Touch input turned out to be the most efficient input modality in terms of answer correctness and was rated highest regarding pragmatic quality. Interestingly touch input was preferred by younger participants. We discuss our findings and conclude that speech interaction should be seriously considered to create engaging conversational user experiences in museums. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70758 SN - 978-3-95908-325-6 SP - 14 EP - 21 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Possamai de Menezes, João Vítor A1 - Kleiner, Christian A1 - Kainz, Marie-Anne A1 - Echternach, Matthias A1 - Birkholz, Peter ED - Baumann, Timo T1 - Synchrony of Glottal Area Waveform Parameters During the Production of Obstruents in Vowel Context T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Obstruents are phonemes which require partial or total obstruction of airflow through the vocal tract. Their articulation also requires adjustments of the laryngeal settings, e. g., an abduction gesture to stop vocal fold vibration for voiceless obstruents. This study investigated the laryngeal settings during the production of voiced and voiceless obstruents in vowel context to analyze the degree of synchrony of the involved glottal gestures. High-speed laryngoscopy images were used to determine the glottal area waveform, from which the time functions of the parameters open quotient (OQ), fundamental frequency (f0), and AC and DC amplitude (ACA and DCA) were calculated and analyzed. Significant correlations were found between all pairs of parameters, with strong correlations between some of them, e.g. Open Quotient and AC Amplitude. Correlations were also either consistently positive or negative for specific pairs of parameters across all investigated phonemes. These results could point to consistent patterns in laryngeal gestures that could enhance articulatory speech synthesis. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70808 SN - 978-3-95908-325-6 SP - 54 EP - 61 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Hillmann, Stefan A1 - Kowol, Philine A1 - Ahmad, Adnan A1 - Tang, Ruochen A1 - Möller, Sebastian ED - Baumann, Timo T1 - Usability and User Experience of a Chatbot for Student Support T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - This paper describes the usability evaluation of the parts of the CHATU chatbot. The evaluation was conducted with 21 participants. A focus of this paper is the description of the carefully designed evaluation procedure, which aims to avoid textual priming of the participants. The general evaluation procedure can be applied to other speech- or text-based conversational systems, and additional material is provided. The evaluation results show that the usability and user experience of CHATU are positively rated. However, the naturalness and novelty of the interaction are not optimal, and the potential influence of users’ experience with LLMs on the evaluation is discussed. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70760 SN - 978-3-95908-325-6 SP - 22 EP - 29 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Kruspe, Anna ED - Baumann, Timo T1 - More than words: Advancements and Challenges in Speech Recognition for Singing T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - This paper addresses the challenges and advancements in speech recognition for singing, a domain distinctly different from standard speech recognition. Singing encompasses unique challenges, including extensive pitch variations, diverse vocal styles, and background music interference. We explore key areas such as phoneme recognition, language identification in songs, keyword spotting, and full lyrics transcription. I will describe some of my own experiences when performing research on these tasks just as they were starting to gain traction, but will also show how recent developments in deep learning and large-scale datasets have propelled progress in this field. My goal is to illuminate the complexities of applying speech recognition to singing, evaluate current capabilities, and outline future research directions. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70748 SN - 978-3-95908-325-6 SP - 1 EP - 10 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Schuler, Christian A1 - Nayak, Shravan A1 - Saha, Debjoy A1 - Baumann, Timo ED - Baumann, Timo T1 - Can We See Your Response Before You Speak? Exploring Linguistic Information Found in Inter-Utterance Pauses T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - In this work we assess whether there is information in pauses in-between utterances of the same or different speakers that are predictive of the following speaker’s utterance. We present models that connect a person’s visual features before they speak to their upcoming utterance. In our experiments we find that outof-the-box pre-trained models can already reach a better-than-chance performance in correlating video embeddings to utterance embeddings. In contrast, models that attempt to predict the first word after the pause do not outperform a unigram model, indicating that our models do not read lips (based e.g. on co-articulation effects) but rather capture more fundamental aspects of the upcoming utterance. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70949 SN - 978-3-95908-325-6 SP - 165 EP - 172 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Schubert, Martha A1 - Sinha, Yamini A1 - Krüger, Julia A1 - Siegert, Ingo ED - Baumann, Timo T1 - Speech Recognition Errors in ASR Engines and Their Impact on Linguistic Analysis in Psychotherapies T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Modern intervention planning in psychotherapies may benefit from predicting process relevant psychotherapy constructs by automated speech analysis. One essential step is the extraction of relevant linguistic speech markers by ASR engines, which because of highly sensible data, work offline. We analyze transcription errors from NeMo, Whisper, and Wav2Vec2.0, focusing on their impact on linguistic markers usually requiring high quality transcripts. By utilizing part-of-speech tagging, we examine error occurrences among different word types. The Linguistic Inquiry and Word Count (LIWC) software aids in extracting markers. We highlight challenges in transcribing spontaneous speech, prevalent in therapy, and compare results with the Mozilla CommonVoice dataset, which features read speech. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70999 SN - 978-3-95908-325-6 SP - 203 EP - 210 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Harnisch, Philipp L. A1 - Hillmann, Stefan ED - Baumann, Timo T1 - Empirical Evaluation of ASR and NLU in a Multimodal Dialogue System for Survey Answering T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - PROM surveys, used to measure the effect of rehabilitation treatments, are typically filled out on paper, and often suffer from low response rates. Replacing it with a multimodal survey system, supporting touch and speech interaction, could lead to lower hurdles and therefore more data quantity. To do this, it requires task-specific training samples for the Automatic Speech Recognition (ASR) and Natural Language Understanding (NLU) to classify spoken answers into one of the standardized PROM answer options. Due to the lack of training data for medical PROM surveys, we created augmented text samples with each answer option description, combined with different templates. To improve training capabilities, introduce a proper test set, and evaluate the ASR, we also collected 1,797 real voice samples within an empirical study. Further, we incorporate the contextual knowledge of the current question into our NLU architecture by implementing one classifier for every question scale. Our results reveal that training with empirical data leads to better results than augmented data from templates and original answer option descriptions. Because of participant mislabeling of 33% due to the ambiguity of the task, we receive overall low NLU performances with up to 51.1% accuracy, and rank-1-accuracy up to 79.3%. We also find that our implementation of many scale-specific NLU classifiers significantly outperforms one NLU classifier for all labels, that incorporates the same contextual knowledge after the prediction, by 8 percent points. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-71007 SN - 978-3-95908-325-6 SP - 211 EP - 218 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Venkateswaran, Siddarth A1 - Al Foysal, Abdullah A1 - Shaik, Nazeer Basha A1 - Böck, Ronald ED - Baumann, Timo T1 - Is there Text in Wine? – S+U Learning-based Named Entity Recognition and Triplet Extraction from Wine Aroma Descriptors T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Wine making is usually considered a domain being far off the processing of speech and language. But in a particular aspect, the domains of speech processing and wine making are related, namely, in the description of wine aromas. These descriptors are used for creating wine expertise as well as more general (advertisement-like) textual representations. In the current paper, we use Natural Language Processing techniques, especially Named Entity Recognition, to identify Aspects and Opinions, reflecting wine characteristics. These are combined with analyses of respective relations (triplet extraction) building Aspect-Opinion-Pairs to establish indicative aroma descriptors, also trying to approach the complex interplay amongst these individual statements. In our experiments, we rely on the Falstaff corpus comprising a huge set of wine descriptions. This results in an average F1 score of around 0.85 for Aspect-Opinion classification. For triplet generation multiple strategies were compared, resulting in an average F1 score of 0.67 in this challenging task. For both tasks we rely only on a handful of manually annotated samples, applying pseudo-labeling methods from seed data to achieve automatic labeling. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70931 SN - 978-3-95908-325-6 SP - 157 EP - 164 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Bauer, Judith A1 - Zalkow, Frank A1 - Müller, Meinard A1 - Dittmar, Christian ED - Baumann, Timo T1 - Evaluating the Impact of Prosody Feature Normalization on the Controllability of Pitch in Speech Synthesis T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Recent neural text-to-speech (TTS) models are able to synthesize highly natural speech signals using deep learning techniques. In practical applications, it can be desirable to have explicit control over the prosody (speech rate, fundamental frequency, and energy) of the synthesized speech. Such controllability can be achieved by adding prosody prediction modules, whose main purpose is to estimate plausible prosody features for each phoneme in the text input. This explicit modeling also allows for changing prosody features at inference time, consequently enabling the adjustment of the prosody in the synthesized audio. In this paper, we evaluate to which extent deliberate manipulation of such prosody features is reflected in the resulting speech audio. We focus particularly on changing the pitch (i.e., fundamental frequency) while applying different normalization strategies. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70976 SN - 978-3-95908-325-6 SP - 188 EP - 195 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Sinha, Yamini A1 - Hintz, Jan A1 - Siegert, Ingo ED - Baumann, Timo T1 - Evaluation of Audio Deepfakes – Systematic Review T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - Generative models for audio are commonly used for music composition, sound effects generation for video game development, audio restoration, voice cloning, etc. The ease of generating indistinguishable fake audio with deep learning poses a major threat to personal privacy, online security, and political discourse. Evaluating the quality and realism of these synthetic utterances is crucial for mitigating the potential for misinformation and harm. To assess this threat, this paper conducts a systematic review, using Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA), on how these deepfake models are currently evaluated. The analysis of 86 papers shows that the majority of the evaluation is conducted on a machine level and highlights a research gap regarding the human perception of deepfakes. This paper explores various methods and perceptual measures employed in assessing audio deepfakes and evaluating their strengths, limitations, and future directions. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70960 SN - 978-3-95908-325-6 SP - 181 EP - 187 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Sering, Konstantin ED - Baumann, Timo T1 - Speech/Non-Speech Classification Slightly Improves Synthesis Quality in PAULE T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - One of the tasks PAULE[1, 2] solves is finding suitable control parameter (cp-)trajectories for a given target acoustic. These cp-trajectories can be used to synthesize speech with the articulatory speech synthesizer of the VocalTractLab (VTL) [3]. If the target acoustic contains substantial microphone noise or other background noises, occasionally PAULE optimizes not for the speech in the target, but for this background noises. By adding a speech/non-speech classifier to the feedback and planning-loop in PAULE this resynthesis of background noises should be mitigated. Unfortunately, the improvements were minor, which might be due to uninformative gradients of the classifier. The importance of informative gradients and the use classifiers to adapt PAULE to different tasks are explained and discussed. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-70955 SN - 978-3-95908-325-6 SP - 173 EP - 180 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Mousavi, Neda A1 - Grawunder, Sven ED - Baumann, Timo T1 - The influence of signal segmentation methods on rhythm-bassed speaker recognition T2 - Elektronische Sprachsignalverarbeitung 2024, Tagungsband der 35. Konferenz, Regensburg, 6.-8. März 2024 N2 - This study investigates the effects of speech segmentation methods on speaker recognition models, particularly with regard to the use of rhythmic feature sets. Using three automatic methods and one manual method on the German database of Kiel corpus, segmentation was performed based on the identification of vowel onsets. Subsequently rhythmic variability indices derived from these intervals were calculated and used for principal component analysis and support vector machine model in order to investigate the variation among speakers. The results underline the influence of signal segmentation methods on speaker recognition models. Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-71014 SN - 978-3-95908-325-6 SP - 225 EP - 232 PB - TUDpress CY - Dresden ER - TY - CHAP A1 - Wiesmaier, Alexander A1 - Lippert, Markus A1 - Karatsiolis, Vangelis A1 - Raptis, Georgios A1 - Buchmann, Johannes T1 - An Evaluated Certification Services System for the German National Root CA - Legally Binding and Trustworthy Transactions in E-Business and E-Government T2 - Proceedings of The 2005 International Conference on E-Business, Enterprise Information Systems, E-Government, and Outsourcing, EEE 2005, Las Vegas, Nevada, USA, June 20-23, 2005 Y1 - 2005 SN - 1-932415-76-9 SP - 103 EP - 108 PB - CSREA Press ER - TY - CHAP A1 - Meyer-Sickendiek, Burkhard A1 - Hussein, Hussein A1 - Baumann, Timo ED - Berton, André ED - Haiber, Udo ED - Minker, Wolfgang T1 - Recognizing Modern Sound Poetry with LSTM Networks T2 - Proceedings of Elektronische Sprachsignalverarbeitung (ESSV) N2 - Our paper focuses on the computational analysis of “readout poetry” (german: Hördichtung) – recordings of poets reading their own work – with regards to the most important type of this genre, the modern “sound poetry” (german: Lautdichtung). Whereas “readout poetry” often uses normal words and sentences, the “sound poetry”, developed by dadaistic poets like Hugo Ball and Kurt Schwitters or concrete poets like Ernst Jandl, Oskar Pastior, or Bob Cobbing, combines the “microparticles of the human voice” like the segments in Ernst Jandls sound poem “schtzngrmm” (“schtzngrmm / schtzngrmm / tttt / tttt / grrrmmmmm / tttt / sch / tzngrmm”). Within the genre of sound poetry, there are two main forms: The lettristic and the syllabic decomposition. A short anecdote will explain this difference: The dadaist Raoul Hausmann developed the lettristic sound poetry in his early dadaistic poem “fmsbw” from 1918. This is said to have inspired his successor Schwitters, whose famous “Ursonate” [The Sonata in Primal Speech] begins with the words “Fümms bö wö tää zää Uu”. With the “Ursonate”, Schwitters developed a syllabic variation of the lettristic poems of Hausmann. The paper shows how to train a bidirectional LSTM network in order to differ between these “dadaistic” sound poems and the “normal” read out poems. In a further step, we will also show how to distinguish between the lettristic and the syllabic decomposition. Based on a bidirectional LSTM network that reads encodings of the character sequence in the poem and uses the output of each directional layer, we identify poems of the sound poetry genre and differentiate between its two types of compositions. The classification results of sound poetry vs. other poetry as well as lettristic vs. syllabic decomposition are with a high performance, yielding a f-scores of 0.86 and 0.84, respectively. KW - Sprachverarbeitung Y1 - 2018 UR - http://www.essv.de/paper.php?id=407 SN - 978-3-959081-28-3 SP - 192 EP - 199 PB - TUDpress CY - Ulm, Germany ER - TY - CHAP A1 - Baumann, Timo A1 - Siegert, Ingo ED - Alt, Florian ED - Schneegass, Stefan ED - Hornecker, Eva T1 - Prosodic addressee-detection : ensuring privacy in always-on spoken dialog systems T2 - Tagungsband Mensch und Computer (MuC'20): 06.09.2020 - 09.09.2020, Magdeburg N2 - We analyze the addressee detection task for complexity-identical dialog for both human conversation and device-directed speech. Our recurrent neural model performs at least as good as humans, who have problems with this task, even native speakers, who profit from the relevant linguistic skills. We perform ablation experiments on the features used by our model and show that fundamental frequency variation is the single most relevant feature class. Therefore, we conclude that future systems can detect whether they are addressed based only on speech prosody which does not (or only to a very limited extent) reveal the content of conversations not intended for the system. KW - addressee detection KW - complexity-identical human-computer interaction KW - computational paralinguistics KW - fundamental frequency variation KW - recurrent neural network Y1 - 2020 SN - 9781450375405 U6 - https://doi.org/10.1145/3404983.3410021 SP - 195 EP - 198 PB - Association for Computing Machinery CY - New York, NY, United States ER - TY - CHAP A1 - Münch, Andreas A1 - Frauenschläger, Tobias A1 - Mottok, Jürgen T1 - Integration of a Security Gateway for Critical Infrastructure into Existing PKI Systems T2 - 3. Symposium Elektronik und Systemintegration (ESI 2022), Tagungsband: 06. April 2022, Hochschule Landshut, Deutschland Y1 - 2022 SN - 978-3-9818439-7-2 SP - 88 EP - 97 PB - Hochschule Landshut CY - Landshut ER - TY - CHAP A1 - Hobelsberger, Martin A1 - Mottok, Jürgen A1 - Dumke, Reiner T1 - Modellbasierte Sicherheitsanalysen von Software-Architekturen T2 - Embedded Software Engineering Kongress, Tagungsband ; 8. bis 10. Dezember 2008, Sindelfingen Y1 - 2008 SP - 436 EP - 443 ER - TY - JOUR A1 - Hobelsberger, Martin A1 - Mottok, Jürgen A1 - Deubzer, Michael T1 - Modellbasierte Sicherheitsanalysen von Software Architekturen JF - Jahresrückblick 2008 des Bayerischen IT-Sicherheitsclusters Y1 - 2008 ER - TY - JOUR A1 - Hobelsberger, Martin A1 - Mottok, Jürgen A1 - Kuntz, Stefan T1 - Architekturmodellierung: Vergleich von EAST ADL und SAE AADL JF - Hanser Automotive Y1 - 2007 IS - 7-8 SP - 43 EP - 47 ER - TY - JOUR A1 - Schwab, E. A1 - Pogrebnoj, S. A1 - Freund, M. A1 - Flossmann, F. A1 - Vogl, Stefanie A1 - Frommolt, K.-H. T1 - Automated bat call classification using deep convolutional neural networks JF - Bioacoustics N2 - Identification of bats is most practically done by exploiting the characteristic features of their echolocation calls. This usually involves expert knowledge, expensive equipment and time-consuming post processing of previously recorded calls. Automated solutions exist, but are usually not as accurate as human experts. We present an automated solution for the processing of bat calls and identification of bat species with extremely high classification accuracy that can be used during live recording or in an automated post-processing software. Our algorithm is the first application of a Deep Convolutional Neural Network to classify bat species based on sound spectrogram images of their echolocation calls. We tested several deep CNN architectures including a modified Google Inception and a ResNet50 architecture. The nets were trained on a very large call database consisting of images of snippets of call spectrograms. All our software was developed in the Python programming language and an executable of the software is available on request. KW - image classification KW - Bat call KW - neural network KW - secholocation Y1 - 2022 U6 - https://doi.org/10.1080/09524622.2022.2050816 SP - 1 EP - 16 PB - Taylor & Francis ER - TY - JOUR A1 - Bary, Benedikt von A1 - Westner, Markus A1 - Strahringer, Susanne T1 - Adding experts’ perceptions to complement existing research on information systems backsourcing JF - International Journal of Information Systems and Project Management N2 - This paper extends the existing literature on information systems (IS) backsourcing by the perception of practitioners. For this purpose, we conducted a series of qualitative, semistructured interviews with IS sourcing experts. The interview questions focused on the participants’ perceptions and experiences with the topic, on identifying reasons for and against IS backsourcing, and on revealing relevant trends pertinent to IS backsourcing. We then compared those findings with two previously conducted comprehensive literature reviews on academic and practitioner literature on IS backsourcing. By following this approach, we contribute to the existing research by verifying previous findings, for example, the most important reasons why companies decide in favor of IS backsourcing. Additionally, we were able to enhance previous contributions as we highlight the significance of differentiating between the scope of IS backsourcing by looking at the underlying services which are potentially backsourced. Further, we identified the importance of managers’ personal preferences as an additional reason for IS backsourcing, for example, based on personal experiences or a perceived need for change. Based on our findings, we created a comprehensive overview of all aspects connected to the IS backsourcing process and derived opportunities for further research to contribute to the IS backsourcing research agenda. KW - backsourcing KW - insourcing KW - back in-house KW - information systems KW - expert interviews KW - Betriebliches Informationssystem KW - Insourcing KW - Umfrage Y1 - 2018 U6 - https://doi.org/10.12821/ijispm060402 SN - 2182-7788 VL - 6 IS - 4 SP - 17 EP - 35 PB - SciKA ER - TY - CHAP A1 - Wulf, Frederik A1 - Westner, Markus A1 - Schön, Maximilian A1 - Strahringer, Susanne A1 - Loebbecke, Claudia T1 - Preparing for a Digital Future: Cloud Strategy at Continental AG T2 - Proceedings of the 40th International Conference on Information Systems (ICIS 2019): Munich, Germany, December 15-18 N2 - This paper is directed towards IT executives aiming to promote the adoption of cloud computing (CC) with in their company. We conducted a longitudinal case study on the evolving CC strategy and its implementation at the multinational company Continental, based on a previous case study by Loebbecke et al. (2012). We narrate Continental's pathway towards CC adoption, which comprised the experimentation, professionalization, and utilization of CC, and discuss current and previous barriers encountered during the implementation. We derive five lessons learned that can serve as practical guidance for executives aiming to accelerate CC adoption within their own organization: (1) differentiate the CC strategy by delivery model; (2)drive proof of concepts to generate reusable blueprints; (3) preinvest in the integration of IaaS and PaaS providers; (4) implement CC gradually, transforming applications during the transition to the cloud; and (5) disseminate knowledge within the organization to enable change. KW - Cloud Computing KW - Strategy KW - Implementation KW - Adoption KW - Knowledge transfer KW - Cloud Computing KW - Implementierung Y1 - 2019 UR - https://aisel.aisnet.org/icis2019/practice_is_research/practice_is_research/1/ SP - 1 EP - 16 ER - TY - CHAP A1 - Zemler, Florian A1 - Westner, Markus T1 - Blockchain and GDPR BT - Application Scenarios and Compliance Requirements T2 - Proceedings of the 30th Portland International Conference for Management of Engineering an Technology (PICMET), 2019, Portland, Oregon N2 - Blockchain and the European General Data Protection Regulation (GDPR) are two topics that are currently highly discussed in academia and amongst professionals. The Blockchain technology is claimed to revolutionize how business is being conducted by its way of storing data and sharing it with others. The recently introduced GDPR has a huge impact on processing personal data because it brought major changes to privacy regulation. This might also affect the processing of personal data in Blockchain-based application scenarios. Based on literature analysis, the paper at hand provides an overview of the Blockchain technology, presents a decision model, and introduces two possible Blockchain application scenarios. It analyses relevant requirements of the GDPR in view of processing personal data and compares these with the fundamental principles of the Blockchain technology. The paper concludes that processing personal data in the Blockchain is violating the GDPR because it conflicts with fundamental specification of this regulation. This finding reveals the need for further research to propose concepts and frameworks for a GDPR-compliant processing of personal data using Blockchain technology. KW - Blockchain KW - GDPR KW - Blockchain KW - Europäische Union KW - Datenschutz-Grundverordnung Y1 - 2019 UR - https://doi.org/10.23919/PICMET.2019.8893923 ER - TY - JOUR A1 - von Bary, Benedikt A1 - Westner, Markus A1 - Strahringer, Susanne T1 - IT Backsourcing BT - Insights and Implications From a Global Survey With IT Practitioners JF - International Journal of IT/Business Alignment and Governance N2 - With the growing importance of IT as competitive advantage, companies aim to increase their digital transformation activities. Consequently, companies are also revisiting their existing IT sourcing arrangements. In the article at hand, the authors explore the concept of IT backsourcing by presenting the results from a quantitative online survey with global IT practitioners. The authors confirm that backsourcing is frequently applied in practice, with key reasons being dissatisfaction with service or relationship quality and higher than expected costs. Further, the authors identify IT services with an increased likelihood of being backsourced, e.g., application development or data center, and discuss the effect of a CIO change on the backsourcing decision. In addition, the authors show that there are differences in the perceptions on the antecedents and the results of backsourcing decisions between management and operational level. The authors conclude with practical implications for IT managers based on their findings. KW - Outsourcing KW - Backsourcing KW - Business-IT Alignment KW - CIO Change KW - Digital Transformation KW - Insourcing Y1 - 2019 U6 - https://doi.org/10.4018/IJITBAG.2019070102 VL - 10 IS - 2 PB - IGI Global ER - TY - CHAP A1 - Fritz, Florian A1 - Schmid, Michael A1 - Mottok, Jürgen ED - Brinkmann, André T1 - Accelerating Real-Time Applications with Predictable Work-Stealing T2 - Architecture of computing systems - ARCS 2020: 33rd international conference, Aachen, Germany, May 25-28, 2020, proceedings N2 - Modern compute architectures often consist of multiple CPU cores to achieve their performance, as physical properties put a limit on the execution speed of a single processor. This trend is also visible in the embedded and real-time domain, where programmers are forced to parallelize their software to keep deadlines. Additionally, embedded systems rely increasingly on modular applications, that can easily be adapted to different system loads and hardware configurations. To parallelize applications under these dynamic conditions, often dispatching frameworks like Threading Building Blocks (TBB) are used in the desktop and server segment. More recently, Embedded Multicore Building Blocks (EMB2) was developed as a task-based programming solution designed with the constraints of embedded systems in mind. In this paper, we discuss how task-based programming fits such systems by analyzing scheduler implementation variants, with a focus on classic work-stealing and the libraries TBB and EMB2. Based on the state of the art we introduce a novel resource-trading concept that allows static memory allocation in a work-stealing runtime holding strict space and time bounds. We conduct benchmarks between an early prototype of the concept, TBB and EMB2, showing that resource-trading does not introduce additional runtime overheads, while unfortunately also not improving on execution time variances. KW - Real-time KW - Parallel programming KW - Work-stealing Y1 - 2020 U6 - https://doi.org/10.1007/978-3-030-52794-5_18 SP - 241 EP - 255 ER - TY - CHAP A1 - Frauenschläger, Tobias A1 - Renner, Sebastian A1 - Mottok, Jürgen T1 - Security Improvements by Separating the Cryptographic Protocol from the Network Stack onto a Multi-MCU Architecture T2 - Architecture of Computing Systems - ARCS 2020: 33rd international conference, Aachen, Germany, May 25-28, 2020, proceedings N2 - The number of IoT devices in SCADA and ICS systems is rising quickly, especially in the domain of critical infrastructures. But these kinds of systems are performing mission critical tasks like controlling devices in industrial facilities or substations in the smart grid. Therefore, they are subject to a lot of regulatory standards. Yet, to provide remote access over the internet, special architectures are developed to integrate a network interface into these devices without inferring with the actual functionality. However, these architectures either lack security measures against cyber-attacks or do not offer the necessary performance for time-critical communication interfaces. To solve that, an architecture consisting of three units is introduced in this paper to provide a network interface with extensive security measures and a high performance. The main feature is the isolation of the cryptographic functionality onto an additional MCU. After proposing the basic concept, the paper presents many implementation details. Based on the current state of implementation, a concept validation of the realized architecture is described. KW - Cyber-security KW - Functional safety KW - Network security KW - Industrial Internet of Things KW - Industrial Control System KW - Supervisory Control and Data Acquisition System Multi microcontroller setup Dos prevention Critical infrastructures KW - Multi microcontroller setup Dos prevention Critical infrastructures KW - Dos prevention KW - Critical infrastructures Y1 - 2020 U6 - https://doi.org/10.1007/978-3-030-52794-5_14 SP - 185 EP - 199 PB - Springer International Publishing ER - TY - CHAP A1 - Dentgen, Manuel A1 - Renner, Sebastian A1 - Mottok, Jürgen ED - Brinkmann, André ED - Karl, Wolfgang ED - Lankes, Stefan ED - Tomforde, Sven ED - Pionteck, Thilo ED - Trinitis, Carsten T1 - Equally Distributed Bus-Communication Access Rights for Inter MCU Communication Using Multimaster SPI T2 - Architecture of Computing Systems - ARCS 2020: 33rd international conference, Aachen, Germany, May 25-28, 2020, proceedings T2 - Lecture notes in computer science ; Bd. 12155 N2 - With the rising complexity and processing power of modern computer systems, the amount of MCU on a single PCB also rises. These microcontrollers often need to communicate with each other to exchange payload and control information in a bidirectional manner. Today’s well-established communication protocols in MCUs either do not fit modern transmission speed requirements or do have an inappropriate master-slave attribute, which does not allow the communication partners to have equal bus access rights. Therefore, this paper introduces an extension of the Serial Peripheral Interface (SPI) to allow an equally distributed access right for the communication interface between two microcontrollers. It simultaneously does fit modern transmission speed requirements of a common network interface, so that the message transmission does not constitute a bottleneck in data processing. Besides the protocol design, we do also provide a first prototype implementation, which constitutes a proof of concept. Y1 - 2020 U6 - https://doi.org/10.1007/978-3-030-52794-5_15 SP - 200 EP - 212 ER - TY - CHAP A1 - Renner, Sebastian A1 - Pozzobon, Enrico A1 - Mottok, Jürgen ED - Meng, Weizhi T1 - A Hardware in the Loop Benchmark Suite to Evaluate NIST LWC Ciphers on Microcontrollers T2 - Information and Communications Security: 22nd International Conference, ICICS 2020, Copenhagen, Denmark, August 24-26, 2020, Proceedings N2 - The National Institute of Standards and Technology (NIST) started the standardization process for lightweight cryptography algorithms in 2018. By the end of the first round, 32 submissions have been selected as 2nd round candidates. NIST allowed designers of 2nd round submissions to provide small updates on both their specifications and implementation packages. In this work, we introduce a benchmarking framework for evaluating the performance of NIST Lightweight Cryptography (LWC) candidates on embedded platforms. We show the features and application of the framework and explain its design rationale. Moreover, we provide information on how we aim to present up-to-date performance figures throughout the NIST LWC competition. In this paper, we present an excerpt of our software benchmarking results regarding speed and memory requirements of selected ciphers. All up-to-date results, including benchmarking different test cases for multiple variants of each 2nd round algorithm on five different microcontrollers, are periodically published to a public website. While initially only the reference implementations were available, the ability of automatically testing the performance of the candidate algorithms on multiple platforms becomes especially relevant as more optimized implementations are developed. Finally, we show how the framework can be extended in different directions: support for more target platforms can be easily added, different kinds of algorithms can be tested, and other test metrics can be acquired. The focus of this paper should rather lay on the framework design and testing methodology than on the current results, especially for reference code. KW - Lightweight cryptography KW - Benchmarking KW - Embedded systems KW - RISC-V Y1 - 2020 U6 - https://doi.org/10.1007/978-3-030-61078-4_28 SP - 495 EP - 509 PB - Springer CY - Cham ER - TY - CHAP A1 - Inderwies, Tom A1 - Mottok, Jürgen T1 - Secure Software Update of a Secure Module in the Power Grid T2 - Proceedings of the Regensburg Applied Research Conference 2020 (RARC 2020), July 31st Y1 - 2020 UR - https://doi.org/10.35096/othr/pub-641 SP - 25 EP - 31 ER - TY - CHAP A1 - Hauser, Florian A1 - Stark, Theresa A1 - Mottok, Jürgen A1 - Gruber, Hans A1 - Reuter, Rebecca T1 - Deliberate Practice in Programming: How is it carried out by programmers? T2 - ECSEE '20: Proceedings of the 4th European Conference on Software Engineering Education, Seeon, Germany, June 2020 N2 - This work in progress study examines through which activities programmers perform deliberate practice to improve their own skills in coding and programming. For this reason, a qualitative questionnaire was developed and conducted with a sample of 22 participants. The results indicate that programmers perform formal and informal forms of training and learning. Typically, a classical programming training in the context of a university course or for work-related reasons is a first step in the acquisition of expertise. Building on these basic skills, non-formal and informal learning activities are carried out by the learners. Especially the social interaction and the collaborative work with other programmers is of great importance in this context. The activities mentioned by the test persons fulfil the characteristics of deliberate practice and will be examined more closely in a further study. Y1 - 2020 SN - ISBN 9781450377522 U6 - https://doi.org/10.1145/3396802.3396815 SP - 42 EP - 46 ER - TY - JOUR A1 - Wenger, Florent A1 - Jaquet-Chiffelle, David-Olivier A1 - Kleine, Nadine A1 - Weber, Karsten A1 - Morgan, Gwenyth A1 - Gordijn, Bert A1 - Inversini, Reto A1 - Bangerter, Endre A1 - Schlehahn, Eva T1 - Canvas White Paper 3 Attitudes and Opinions Regarding Cybersecurity JF - SSRN Electronic Journal Y1 - 2017 U6 - https://doi.org/10.2139/ssrn.3091920 SN - 1556-5068 VL - 10 IS - 5 PB - Elsevier ER - TY - CHAP A1 - Weber, Karsten ED - Lewandowski, Dirk T1 - Search Engine Bias T2 - Handbuch Internet-Suchmaschinen, Band II N2 - Der Name ‚Google’ wird heute synonym für ‚Suchmaschine’ genutzt; das Verb ‚googeln’ hat es zu einem Eintrag im Duden gebracht: Google ist allgegenwärtig. Dies bestätigen Statistiken, die aufweisen, dass Google in vielen Ländern andere Suchmaschinen völlig marginalisiert hat. Außerdem zeigen Untersuchungen, dass sich viele Nutzerinnen und Nutzer auf die Ergebnisse einer einzigen Suchmaschine – oft eben Google – verlassen. Daher stellt sich die Frage, ob die tatsächliche Qualität der Suchergebnisse das Vertrauen in die angenommene Qualität einer Suchmaschine rechtfertigen kann. Nach einleitenden Bemerkungen zum Suchmaschinenmarkt und einer kurzen Beschreibung der generellen Funktionsweise heute verbreiteter Suchmaschinen wird evaluiert, welche Faktoren die Ergebnisse einer Suchmaschine determinieren. Dabei wird sich zeigen, dass Suchergebnisse durch vielfältige Faktoren beeinflusst werden, so bspw. durch das Nutzerverhalten auf verschiedenen Ebenen, durch die verwendeten Indexierungs- und Suchalgorithmen oder durch die Inhalte des Netzes selbst. Diese und weitere Faktoren führen zu Verzerrungen der Suchergebnisse gegenüber einem unterstellten Idealergebnis. Es zeigt sich, dass es in vielen Situationen sinnvoll ist, sich nicht nur auf eine Suchmaschine zu verlassen bzw. den Ergebnissen einer Suchmaschine nicht blind zu vertrauen. So ist im wissenschaftlichen oder journalistischen Kontext dringend die Nutzung von bereichsspezifischen Suchmaschinen und anderer Rechercheformen angeraten. KW - Suchmaschine KW - Suchergebnis KW - Verzerrung KW - Fehler KW - Bias Y1 - 2011 UR - https://www.researchgate.net/publication/256473910_Search_Engine_Bias PB - Akademische Verlagsanstalt CY - Heidelberg ER - TY - CHAP A1 - Haug, Sonja A1 - Weber, Karsten ED - Grimm, Petra ED - Keber, Tobias O. ED - Zöllner, Oliver T1 - Vertrauen, Kontrolle und Privatsphäre in engen sozialen Beziehungen und die Wirkungen moderner Informations- und Kommunikationstechnologie T2 - Anonymität und Transparenz in der digitalen Gesellschaft Y1 - 2015 UR - https://www.researchgate.net/publication/317063738 SN - 978-3-515-11226-0 PB - Steiner CY - Stuttgart ER - TY - JOUR A1 - von Bary, Benedikt A1 - Westner, Markus A1 - Strahringer, Susanne T1 - IT-Backsourcing BT - Empirische Erkenntnisse und Handlungsempfehlungen für eine erfolgreiche Re-Integration der IT-Serviceerbringung JF - HMD Praxis der Wirtschaftsinformatik N2 - IT-Backsourcing bezeichnet die Re-Integration vormals outgesourcter IT-Services zurück zum auslagernden Unternehmen. Die vorliegende Studie stellt die Ergebnisse einer Umfrage unter IT-Managern zu Einflussfaktoren von IT-Backsourcing-Entscheidungen vor. Es lässt sich feststellen, dass IT-Backsourcing von Unternehmen in unterschiedlichen Branchen und für eine Vielzahl an unterschiedlichen IT-Services, wie z. B. Applikationsentwicklung oder Infrastruktur-Leistungen, durchgeführt wird. Hauptgründe für die Entscheidung für ein IT-Backsourcing sind mangelnde Qualität, hohe Kosten sowie eine schlechte Beziehung zum IT-Dienstleister. Die Ergebnisse der Umfrage zeigen, dass diejenigen Unternehmen, die sich für ein Backsourcing entschieden haben, nach der Entscheidung insgesamt zufriedener waren als diejenigen, die in einer Outsourcing-Beziehung geblieben sind. Zudem werden verschiedene Handlungsempfehlungen für IT-Manager aufgezeigt. Zur Ausarbeitung einer zukunftsorientieren IT-Sourcing-Strategie empfiehlt es sich, eine service-spezifische Sourcing-Strategie zu verfolgen und entsprechend spezialisierte Dienstleister einzusetzen. Im Falle einer Entscheidung für ein IT-Backsourcing sollten verschiedene Erfolgsfaktoren beachtetet werden, wie z. B. eine frühzeitige Neubesetzung von Schlüsselstellen sowie ein lückenloser Wissenstransfer. KW - Betriebliches Informationssystem KW - Insourcing KW - Backsourcing KW - Insourcing KW - IT-Sourcing KW - Re-Integration KW - IT-Service Y1 - 2020 U6 - https://doi.org/10.1365/s40702-020-00591-1 VL - 57 IS - 4 SP - 849 EP - 865 PB - Springer ER - TY - JOUR A1 - Weber, Karsten T1 - Mobile Access to Information: Some Questions JF - CSI Communications, Special Issue on "Information Ethics" Y1 - 2005 UR - http://www.capurro.de/csi_June2005infoeth.pdf IS - 6 SP - 21 EP - 22 ER - TY - GEN A1 - Weiss, Nils T1 - Reverse Engineering and Weaponizing OBD Dongles T2 - Automotive Security Research Group, Stuttgart, Germany 2019, Meeting 22 Y1 - 2019 UR - https://www.meetup.com/de-DE/Automotive-Security-Research-Group-ASRG/events/261796924/ ER - TY - CHAP A1 - Schildgen, Johannes A1 - Deßloch, Stefan T1 - SQL-Grundlagen spielend lernen mit dem Text-Adventure SQL Island T2 - Datenbanksysteme für Business, Technologie und Web : (BTW 2015) ; 16. Fachtagung des GI-Fachbereichs "Datenbanken und Informationssysteme" (DBIS), 04. - 06.03.2015 in Hamburg, Germany N2 - Wir pr asentieren SQL Island, ein neuartiges browserbasiertes Lernspiel,welches auf dem Konzept der Text-Adventures basiert. Nach einem Flugzeugabsturzlandet die Spielfigur auf einer Insel. Man redet mit Bewohnern, sammelt Gegenst ̈andeund k ̈apft gegen B ̈osewichte. Die Besonderheit bei diesem Spiel ist jedoch, dass derSpieler seine Figur lediglich mittels SQL-Befehlen steuert. Alle n ̈otigen Befehle wer-den zun ̈achst pr ̈asentiert, sodass keine Vorerfahrung notwendig ist. Nach etwa einerStunde Spielzeit beherrscht der Spieler SELECT-, UPDATE- und DELETE-Anfragensowie Gruppierungen, Aggregationsfunktionen und Joins. Das Spiel kann online aufhttp://www.sql-island.de kostenlos und ohne Registrierung gespielt werden. T2 - Learning SQL basics effortlessly with the text adventure SQL Island Y1 - 2015 UR - https://www.researchgate.net/publication/277565412_SQL-Grundlagen_spielend_lernen_mit_dem_Text-Adventure_SQL_Island VL - 241 SP - 687 EP - 690 PB - Gesellschaft für Informatik e.V. ER - TY - INPR A1 - Steffens, Oliver T1 - Nomograms for Quadratic and Cubic Equations Y1 - 2024 U6 - https://doi.org/10.13140/RG.2.2.12187.48168 ER - TY - CHAP A1 - Tao, Ye A1 - Liu, Guozhu A1 - Mottok, Jürgen A1 - Hackenberg, Rudolf A1 - Hagel, Georg A1 - Mottok, Jürgen T1 - Just-in-Time Teaching in software engineering: A Chinese-German empirical case study T2 - 2014 IEEE Global Engineering Education Conference (EDUCON), 3-5 April 2014, Istanbul, Turkey N2 - Learning centered teaching becomes an important factor in a global perspective of learning software engineering. The Just-in-Time Teaching approach is used in a Chinese-German empirical case study. In a one year terminated project we will analyze the performance of our students in an active learning scenario with Just-in-Time Teaching and Peer Instruction. We will contribute an inter-cultural comparison of achieved competencies by student’s self-assessment and teacher’s observation. KW - Activating Learning KW - Blended Learning KW - Conferences KW - Educational institutions KW - E-Learning KW - ISO Standards KW - JiTT KW - Just-in-Time Teaching KW - Materials KW - Practical Learning KW - Software KW - Software engineering Y1 - 2014 U6 - https://doi.org/10.1109/EDUCON.2014.6826220 SP - 983 EP - 986 PB - IEEE ER - TY - JOUR A1 - Filippov, O. A1 - Ringhofer, K. H. A1 - Shamonin (Chamonine), Mikhail A1 - Shamonina, Ekaterina A1 - Kamshilin, A. A. A1 - Nippolainen, E. A1 - Sturman, B. I. T1 - Polarization properties of light-induced scattering in Bi_12TiO_20 crystals BT - theory and experiment for diagonal geometry JF - Journal of the Optical Society of America B N2 - Illumination of ac-biased photorefractive Bi12TiO20 crystals with a coherent light beam results in the development of strong nonlinear scattering. Theoretically and experimentally we investigate the angular and polarization characteristics of the scattered light for the diagonal ([1̲1̲1]) optical configuration and different polarization states of the pump. A satisfactory understanding of the observed scattering properties is achieved for most of the cases investigated. Y1 - 2003 U6 - https://doi.org/10.1364/josab.20.000677 VL - 20 IS - 4 PB - Optica Publishing Group ER - TY - CHAP A1 - Jahn, Sabrina A1 - Gold-Veerkamp, Carolin A1 - Reuter, Rebecca A1 - Mottok, Jürgen A1 - Abke, Jörg T1 - Secure Software Engineering in academic education: students’ sreconceptions of it security T2 - 12th International Conference of Education, Research and Innovation (ICERI2019), 11-13 November 2019, Seville, Spain Y1 - 2019 U6 - https://doi.org/10.21125/iceri.2019.1624 SP - 6825 EP - 6834 ER - TY - JOUR A1 - Krüger, Norbert A1 - Fischer, Kerstin A1 - Manoonpong, Poramate A1 - Palinko, Oskar A1 - Bodenhagen, Leon A1 - Baumann, Timo A1 - Kjærum, Jens A1 - Rano, Ignacio A1 - Naik, Lakshadeep A1 - Juel, William Kristian A1 - Haarslev, Frederik A1 - Ignasov, Jevgeni A1 - Marchetti, Emanuela A1 - Langedijk, Rosalyn Melissa A1 - Kollakidou, Avgi A1 - Jeppesen, Kasper Camillus A1 - Heidtmann, Conny A1 - Dalgaard, Lars T1 - The SMOOTH-Robot: A Modular, Interactive Service Robot JF - Frontiers in Robotics and AI N2 - The SMOOTH-robot is a mobile robot that-due to its modularity-combines a relatively low price with the possibility to be used for a large variety of tasks in a wide range of domains. In this article, we demonstrate the potential of the SMOOTH-robot through three use cases, two of which were performed in elderly care homes. The robot is designed so that it can either make itself ready or be quickly changed by staff to perform different tasks. We carefully considered important design parameters such as the appearance, intended and unintended interactions with users, and the technical complexity, in order to achieve high acceptability and a sufficient degree of utilization of the robot. Three demonstrated use cases indicate that such a robot could contribute to an improved work environment, having the potential to free resources of care staff which could be allocated to actual care-giving tasks. Moreover, the SMOOTH-robot can be used in many other domains, as we will also exemplify in this article. KW - human–robot interaction KW - mobile robots KW - proactive control KW - service robots KW - socially aware navigation Y1 - 2021 U6 - https://doi.org/10.3389/frobt.2021.645639 VL - 8 PB - Frontiers ER - TY - CHAP A1 - Soska, Alexander A1 - Mottok, Jürgen ED - Pivec, M. ED - Gründler, J. T1 - An Integrated Puzzle Game for Learning Programming Based on Students Syntactical Errors T2 - 11th European Conference on Game-Based Learning, Oct 5 - Oct 6, 2017, Graz N2 - Practical implementations are important for understanding the concepts and principles of programming. Self-employed coding encourages learners to acquire learning content and fosters the theory-practice transfer. Thereby, the earners face various difficulties and obstacles. Misconceptions and faults accompany the learners’ coding process and result in non-executable coding artefacts. The integrated compiler of programming environments provides information concerning error messages that indicate incorrect coding constructs. Usually due to unspecific and generic formulation, learners find it hard to understand these error messages. Yet these observable errors give valuable information about the learner’s coding behaviour and indicate current problems. These provide a link for adopted and appropriate learning assistance during the coding process. In this work in progress paper, we present first assumptions in assisting learners’ understanding and correction of programming errors by a game-based learning method. Our first approach focuses on the integration of a puzzle game into a programming environment. The game content adjusts to the error messages based on the analysis of the learner’s log file. We suggest that the integration of this approach rises the learner’s motivation to self-employed error handling and the quality of learning programming. Y1 - 2017 PB - Academic Conferences and Publishing International ER - TY - JOUR A1 - Hillebrand, Patrick A1 - Westner, Markus T1 - Success factors of long-term CIOs JF - Information Systems and e-Business Management N2 - Although the average tenure of CIOs has increased over the last years, the majority of CIOs have been in their positions for only three years or less. Nevertheless, some CIOs have been successful in their position for a long time. In this study, we use tenure as a proxy for success as a CIO. The goal of this paper is to examine factors that are critical to the success of long-term CIOs. For this purpose, we created and analyzed resumes of 384 CIOs. Out of these 384, we conducted 19 interviews with CIOs from top-tier companies and collected and analyzed both qualitative and quantitative data. In the process, we were able to identify nine factors that are critical for the success (CSF) of CIOs. These factors fall into three categories. Category “Personality” includes “Accepting and embracing change” (CSF #1), “Being perseverant to pursue long-term goals” (CSF #2), “Anticipating the future through visionary thinking” (CSF #3), and “Being empathetic to deal with uncertainty felt by co-workers” (CSF #4). The “Role Fulfilment” category includes “Cross-functional involvement and integration of the IT organization” (CSF #5), “Positioning and restructuring of the IT organization” (CSF #6), and “Well-connected and communicative leadership” (CSF #7). The “Organizational Environment” category consists of “Availability of skilled workforce” (CSF #8) and “Reporting line to the CEO” (CSF #9). CSFs 1, 2, and 3 were perceived as most important by the participating CIOs. The results may be of particular interest both to aspiring CIOs and equally their employing organizations, as they reflect what long-term CIOs value during their time in office. KW - Chief information officer KW - CIO tenure KW - Critical success factors KW - CIO roles KW - Interview-based exploratory mixed-method study Y1 - 2022 U6 - https://doi.org/10.1007/s10257-021-00546-z N1 - Corresponding Author: Markus Westner VL - 20 SP - 79 EP - 122 PB - Springer Nature ER - TY - JOUR A1 - Stein, Oliver T1 - On analytic properties of the standard zeta function attached to a vector-valued modular form JF - Research in Number Theory N2 - We proof a Garrett–Böcherer decomposition of a vector-valued Siegel Eisenstein series E2l,0 of genus 2 transforming with the Weil representation of Sp2(Z) on the group ring C[(L′/L)2]. We show that the standard zeta function associated to a vector-valued common eigenform f for the Weil representation can be meromorphically continued to the whole s-plane and that it satisfies a functional equation. The proof is based on an integral representation of this zeta function in terms of f and E2l,0. Y1 - 2022 U6 - https://doi.org/10.1007/s40993-022-00368-z N1 - Corresponding author: Oliver Stein VL - 8 IS - 4 SP - 1 EP - 27 PB - Springer Nature ER - TY - JOUR A1 - Frikel, Jürgen A1 - Haltmeier, Markus T1 - Efficient regularization with wavelet sparsity constraints in photoacoustic tomography JF - Inverse Problems N2 - In this paper, we consider the reconstruction problem of photoacoustic tomography (PAT) with a flat observation surface. We develop a direct reconstruction method that employs regularization with wavelet sparsity constraints. To that end, we derive a wavelet-vaguelette decomposition (WVD) for the PAT forward operator and a corresponding explicit reconstruction formula in the case of exact data. In the case of noisy data, we combine the WVD reconstruction formula with soft-thresholding, which yields a spatially adaptive estimation method. We demonstrate that our method is statistically optimal for white random noise if the unknown function is assumed to lie in any Besov-ball. We present generalizations of this approach and, in particular, we discuss the combination of PAT-vaguelette soft-thresholding with a total variation (TV) prior. We also provide an efficient implementation of the PAT-vaguelette transform that leads to fast image reconstruction algorithms supported by numerical results. KW - Image reconstruction KW - photoacoustic tomography KW - sparsity constraints KW - variational regularization KW - wavelet-vaguelette decomposition Y1 - 2018 U6 - https://doi.org/10.1088/1361-6420/aaa0ac N1 - Corresponding authors: Jürgen Frikel and Markus Haltmeier VL - 34 IS - 2 SP - 1 EP - 28 ER - TY - JOUR A1 - Schiek, Roland T1 - Nonlinear refractive index in silica glass JF - Optical Materials Expres N2 - The third-order nonlinear susceptibility of silica glass is measured via self-phase modulation in standard single mode fibers at a wavelength of 1550 nm. To minimize the influence of polarization state changes along the propagation only meter-long fibers were investigated. With pulse durations of picoseconds a quasi-instantaneous nonlinearity with ultrafast electronic and fast nuclear-vibration contributions produces under conditions of negligible dispersion a classic and clean nonlinear phase shift following exactly the shape of the pulse power. The complex pulse envelope was retrieved from frequency optical gating spectrograms. The nonlinear fiber parameter γ could be determined with an accuracy of 3.7 percent. Considering the mode field structure and the doping influence the nonlinear refractive index of silica glass as the fiber base material was found to be n 2 =2.22⋅10 −16 cm 2 W±6.0% for picosecond-long pulses. Comparing nonlinear phase shifts from linear and circular polarized light a nuclear-vibration contribution to the cubic fiber nonlinearity of 25 percent was estimated. Y1 - 2023 U6 - https://doi.org/10.1364/ome.489520 N1 - Corresponding author: Roland Schiek VL - 13 IS - 6 SP - 1727 EP - 1740 PB - Optica ER - TY - CHAP A1 - Kousidis, Spyros A1 - Kennington, Casey A1 - Baumann, Timo A1 - Buschmeier, Hendrik A1 - Kopp, Stefan A1 - Schlangen, David T1 - Situationally Aware In-Car Information Presentation Using Incremental Speech Generation: Safer, and More Effective T2 - Proceedings of the EACL 2014 Workshop on Dialogue in Motion, Gothenburg, Sweden N2 - Holding non-co-located conversationswhile driving is dangerous (Horrey and- Wickens, 2006; Strayer et al., 2006), much more so than conversations with physically present, “situated” interlocutors (Drews et al., 2004). In-car dialogue systems typically resemble non-co-located conversations more, and share their negative impact (Strayer et al., 2013). We implemented and tested a simple strategy for making in-car dialogue systems aware of the driving situation, by giving them the capability to interrupt themselves when a dangerous situation is detected,and resume when over. We show that this improves both driving performance and recall of system-presented information, compared to a non-adaptive strategy. KW - in-car information presentation KW - incremental speech generation KW - situation awareness Y1 - 2014 U6 - https://doi.org/10.3115/v1/W14-0212 SP - 68 EP - 72 PB - Association for Computational Linguistics ER - TY - JOUR A1 - Brenning, Stefanie A1 - Heckner, Markus A1 - Wolff, Christian T1 - Design Thinking als Innovationsmethode im Hochschulkontext - Konzepte und Erfahrungen JF - Die Neue Hochschule: DNH N2 - Wir möchten mit diesem Beitrag die Ergebnisse der Evaluation eines Design-Thinking-Workshopformats zur Unterstützung von Innovation und Transfer im Hochschulverbund TRIO vorstellen und Einblicke in unsere Erkenntnisse geben. Y1 - 2022 UR - https://epub.uni-regensburg.de/58239/1/DNH_Ausgabe_03_22_RZ_22-25.pdf U6 - https://doi.org/10.5281/zenodo.6576069 IS - 3 SP - 22 EP - 25 ER - TY - CHAP A1 - Klettke, Meike A1 - Störl, Uta A1 - Shenavai, Manuel A1 - Scherzinger, Stefanie A1 - Storl, Uta T1 - NoSQL schema evolution and big data migration at scale T2 - 2016 IEEE International Conference on Big Data (Big Data), 5-8 Dec. 2016, Washington, DC N2 - This paper explores scalable implementation strategies for carrying out lazy schema evolution in NoSQL data stores. For decades, schema evolution has been an evergreen in database research. Yet new challenges arise in the context of cloud-hosted data backends: With all database reads and writes charged by the provider, migrating the entire data instance eagerly into a new schema can be prohibitively expensive. Thus, lazy migration may be more cost-efficient, as legacy entities are only migrated in case they are actually accessed by the application. Related work has shown that the overhead of migrating data lazily is affordable when a single evolutionary change is carried out, such as adding a new property. In this paper, we focus on long-term schema evolution, where chains of pending schema evolution operations may have to be applied. Chains occur when legacy entities written several application releases back are finally accessed by the application. We discuss strategies for dealing with chains of evolution operations, in particular, the composition into a single, equivalent composite migration that performs the required version jump. Our experiments with MongoDB focus on scalable implementation strategies. Our lineup further compares the number of write operations, and thus, the operational costs of different data migration strategies. KW - Big data KW - Context KW - Data Migration Strategies KW - Data models KW - Databases KW - Incremental Migration KW - Lazy Composite Migration KW - Lazy Migration KW - NoSQL databases KW - Predictive Migration KW - Production KW - Runtime KW - schema evolution KW - Software Y1 - 2016 U6 - https://doi.org/10.1109/BigData.2016.7840924 SP - 2764 EP - 2774 PB - IEEE ER - TY - JOUR A1 - Klettke, Meike A1 - Scherzinger, Stefanie A1 - Störl, Uta T1 - Datenbanken ohne Schema? JF - Datenbank-Spektrum N2 - In der Entwicklung von interaktiven Web-Anwendungen sind NoSQL-Datenbanksysteme zunehmend beliebt, nicht zuletzt, weil sie flexible Datenmodelle erlauben. Das erleichtert insbesondere ein agiles Projektmanagement, das sich durch häufige Releases und entsprechend häufige Änderungen am Datenmodell auszeichnet. In diesem Artikel geben wir einen Überblick über die besonderen Herausforderungen der agilen Anwendungsentwicklung gegen schemalose NoSQL-Datenbanksysteme. Wir stellen Strategien für die Schema-Evolution aus der Praxis vor, und postulieren unsere Vision einer eigenen Schema-Management-Komponente für NoSQL-Datenbanksysteme, die für eine kontinuierliche und systematische Schema-Evolution ausgelegt ist. KW - NoSQL-Datenbanksysteme KW - Schema-Evolution KW - Schema-Informationen Y1 - 2014 U6 - https://doi.org/10.1007/s13222-014-0156-z VL - 14 IS - 2 SP - 119 EP - 129 PB - Springer ER - TY - JOUR A1 - Störl, Uta A1 - Klettke, Meike A1 - Scherzinger, Stefanie T1 - Kurz erklärt: Objekt-NoSQL-Mapping JF - Datenbank-Spektrum Y1 - 2016 U6 - https://doi.org/10.1007/s13222-016-0212-y VL - 16 IS - 1 SP - 83 EP - 87 PB - Springer ER - TY - JOUR A1 - Hager, Markus A1 - Seitz, Jochen A1 - Waas, Thomas T1 - Literature Survey on Recent Progress in Inter-Vehicle Communication Simulations JF - Journal of Transportation Technologies N2 - The vehicular ad hoc network (VANET) technology based on the approved IEEE 802.11p standard and the appendant inter-vehicle communication (IVC) has the potential to dramatically change the way transportation systems work. The fundamental idea is to change the individual behavior of each vehicle by exchanging information among traffic participants to realize a cooperative and more efficient ransportation system. Certainly, the evaluation of such systems is a comprehensive and challenging task in a real world test bed, therefore, simulation frameworks are a key tool to analyze IVC. Several models are needed to emulate the real behavior of a VANET in all aspects as much realistically as necessary. The intention of this survey is to provide a comprehensive overview of publications concerning IVC simulations of the year 2013 and to see how IVC simulation has changed since 2009. Based on this analysis, we will answer the following questions: What simulation techniques are applied to IVC? Which aspects of IVS have been evaluated? What has changed within five years of IVC simulations? We also take a closer look at commonly used software tools and discuss their functionality and drawbacks. Finally, we present open questions concerning IVC simulations. KW - Inter-Vehicle Communication KW - Simulation KW - Survey Y1 - 2015 UR - https://file.scirp.org/pdf/JTTs_2015071315165413.pdf U6 - https://doi.org/10.4236/jtts.2015.53015 VL - Vol. 5 IS - 3 SP - 159 EP - 168 ER - TY - CHAP A1 - Jahn, Sabrina A1 - Kaul, Nicolas A1 - Mottok, Jürgen T1 - Using or Misusing? Introducing Misuse Cases in a Software Engineering Course for Undergraduate Engineering Students T2 - ITiCSE '22 : Proceedings of the 27th ACM Conference on on Innovation and Technology in Computer Science Education, Vol 1: July 8 - 13, 2022, Dublin Ireland N2 - Today's cyberphysical systems are increasingly prone to misuse. To secure existing and future software systems, introducing concepts of IT-Security and Secure Software Engineering (SecSE) in Software Engineering (SE) courses is essential for academic education of future software engineers. This is not only important for computer science students, but also for engineering students studying topics of computing and SE. However, only little research exists on integrating these topics into traditional SE courses, especially for engineering students in non-computer science majors. To narrow this gap, this paper contributes with the design and evaluation of an exercise on modeling misuse cases alongside use cases, based on the inductive teaching method problem-based learning (PBL). The exercise is part of an educational design research investigating which learning content and teaching methods are suitable for integrating IT-Security and SecSE topics into traditional SE education of engineering students to convey factual knowledge as well as raise awareness and interest for both topics during software development. We present the integration of the exercise design into a traditional SE course for engineering students and its evaluation to examine its suitability. We evaluated the exercise design regarding the suitability of the design components, the learning content of misuse cases and the intended learning goals as well as its impact on students' motivation, and their interest in IT-security. The paper then presents indications on the feasibility and success of the exercise design for teaching misuse cases to engineering students and sparking their interest in IT-Security. KW - educational design research KW - mis-use case KW - problem-based learning KW - inductive teaching KW - engineering students KW - higher education KW - secure software engineering KW - IT-Security Y1 - 2022 U6 - https://doi.org/10.1145/3502718.3524823 SP - 491 EP - 497 PB - Association for Computing Machinery CY - New York, NY ER - TY - CHAP A1 - Osinski, Lukas A1 - Langer, Tobias A1 - Mader, Ralph A1 - Mottok, Jürgen T1 - Challenges and Opportunities with Embedded Multicore Platforms BT - Spotlight on Real-Time and Dependability Concepts T2 - 9th European Congress Embedded Real Time Software and Systems (ERTS 2018), January 31st to Febraury 2nd 2018, Toulouse, France Y1 - 2018 UR - https://hal.archives-ouvertes.fr/hal-02156232/ ER - TY - CHAP A1 - Nivala, Markus A1 - Hauser, Florian A1 - Jossberger, Helen A1 - Reiß, Markus A1 - Mottok, Jürgen A1 - Gruber, Hans T1 - Detecting errors in program flow diagrams: Comparing novices and advanced programmers T2 - EARLI Biennial Conference 2017, 17th European Association for Research on Learning and Instruction, 29 August - 2 September, 2017 - University of Tampere, Finland Y1 - 2017 ER - TY - RPRT A1 - Soska, Alexander A1 - Mottok, Jürgen ED - Baier, Wolfgang T1 - An Experimental Card Game for Software Testing T2 - Forschungsbericht 2017 der Ostbayersichen Technischen Hochschule Regensburg Y1 - 2017 UR - https://doi.org/10.35096/othr/pub-1383 CY - Regensburg ER - TY - CHAP A1 - Osinski, Lukas A1 - Mottok, Jürgen T1 - Control Flow Errors: A Discussion of Different Injection Strategies T2 - 32nd International Conference on Architecture of Computing Systems, ARCS Workshop 2019, 20-21 May 2019, Copenhagen, Denmark N2 - Among the available dependability assessment techniques, fault injection (FI) is widely adopted and strongly recommended by safety standards for the validation that functional and technical safety mechanisms are implemented correctly and effectively. The main challenge in fault injection assessments is the increasing complexity of system-on-chips as well as the increasing size of memory, which leads to enormous efforts to test every possible fault introduced to the system. Therefore, a number of publicly available fault injection frameworks utilize fault space pruning techniques to reduce the overall fault space and consequently the overall experiment duration. Most of the fault space pruning techniques mainly discuss the reduction of the number of data errors which have to be injected into registers and memory locations. However, control flow errors represent a further domain of possible errors on the application level. Usually for the evaluation of effectiveness of fault tolerance mechanisms against data errors, a single fault assumption at microarchitectural level (e.g. bit-flips) is assumed. In most cases, this assumption is equivalently applied to the program counter to investigate possible control flow errors. Due to this approach, the error space is consciously or unconsciously reduced to the possible erroneous jump targets that can be reached by a specific set of bit-flips in the program counter at a specified time during the program execution. This approach is considered valid regarding the corresponding fault assumption, but leads to negative effects on the significance of the injection and the resulting effectiveness of the tested fault tolerance mechanism. In this paper, we discuss different strategies for the analysis and injection of control flow errors and the resulting differences by considering the single fault assumption at microarchitectural and application level. Y1 - 2019 UR - http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8836207&isnumber=8836190 SP - 1 EP - 7 ER - TY - CHAP A1 - Nagengast, Christian A1 - Osinski, Lukas A1 - Mottok, Jürgen T1 - Synchronization Techniques for Parallel Redundant Execution of Applications T2 - 32nd International Conference on Architecture of Computing Systems, ARCS Workshop 2019, 20-21 May 2019, Copenhagen, Denmark N2 - In fault tolerant systems, applications are replicated and executed to enable error detection and recovery. If one replica application fails, another is able to take its place and provide the correct results. This concept can benefit from parallel execution on separate execution units. The rise of multicore platforms supports the development of parallel software, by providing the adequate hardware. However, this raises challenges regarding the synchronization of the redundant strings of execution. Replica determinism means that given the same input, identical programs provide the same output. To ensure replica determinism, requirements regarding the synchronization can be split in two domains: data and time. This paper examines the state of the art of synchronization techniques for parallel replicated execution in the context of fault tolerant systems. We analyze the requirements regarding synchronization within the time and data domain and compare different concepts of hardware (multicore, multiprocessor and multi-PCB) and software (processes, threads). Y1 - 2019 UR - http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8836209&isnumber=8836190 SP - 1 EP - 8 PB - IEEE ER - TY - JOUR A1 - Wulf, Frederik A1 - Westner, Markus A1 - Strahringer, Susanne T1 - Cloud Computing Adoption: A Literature Review on What Is New and What We Still Need to Address JF - Communications of the Association for Information Systems N2 - Research on cloud computing (CC) recently emerged congruently with the technology’s importance for organizations at a fast pace. This makes it difficult for practitioners to obtain a consolidated overview of what determines CC adoption based on the numerous papers in this regard. Moreover, for further research in the field to add value, it is necessary to identify what still needs to be addressed. In this vein, we conducted a descriptive review of 39 papers, integrating the results of a previous review on 23 papers from 2014, to compare findings across studies. We identify 44 determinant factors that exhibit consistent directional influence on the dependent meta-variable “CC adoption”, extending previous literature reviews with regard to asset, client, and environmental characteristics. We then critically reviewed the research landscape to identify what is there, and what is not yet covered: Future research should specifically regard the adoption of Infrastructure-, Platform-, and Everything-as-a-Service, private, hybrid, and multi-cloud deployment, investigate vendor, solution, and individual characteristics, analyzing information systems, or the decision-maker. KW - Cloud Computing KW - Literaturbericht Y1 - 2021 U6 - https://doi.org/10.17705/1CAIS.04843 SN - 1529-3181 VL - 48 IS - 1 SP - 523 EP - 561 PB - Association for Information Systems, AIS ER - TY - JOUR A1 - Abhijit Sen, Kwantlen A1 - Baumgartner, Laura A1 - Heiß, Katharina A1 - Wagner, Cornelia T1 - DevOps paradigm BT - a pedagogical approach to manage and implement IT project JF - Issues in Information Systems N2 - DevOps, the widely used term in software industry, integrates the Development and IT Operations activities to frequently deliver, deploy, and release quality software features. DevOps approach emphasizes collaboration among Developments and IT operations teams throughout System Development Life Cycle (SDLC). The DevOps process is supported by wide variety of tool chains for various phases of SDLC. There exist many DevOps models. However, in this paper authors use a simple four phase pedagogical models to demonstrate principles of DevOps. In this paper authors attempt to show how DevOps principles can effectively be used to manage and implement business problems in classroom setting. Specifically, DevOps methodology is applied to manage develop and implement a small web application. This pedagogical approach is specially aimed at students who do not have prior experiences and skillsets in applying DevOps methodology and associated toolsets to every stages of SDLC. At the conclusion of the project, students gained valuable insights on how to apply DevOps principles to business problems and to select and use commonly used state of the arts tools to plan, manage, build, test, monitor, deploy tasks at every stages of DevOps. The authors also discuss the limitations and practical issues related to implementing DevOps within classroom settings. KW - Continuous delivery KW - Continuous Deployment KW - Continuous integration KW - Continuous Monitoring KW - DevOps KW - SDLC KW - KPIs Y1 - 2021 U6 - https://doi.org/10.48009/4_iis_2021_117-133 SN - 1529-7314 VL - 22 IS - 4 SP - 110 EP - 125 PB - International Association for Computer Information Systems ER - TY - BOOK A1 - Dünnweber, Jan A1 - Gorlatch, Sergei T1 - Higher-Order Components for Grid Programming BT - Making Grids More Usable N2 - A major challenge in grid computing remains the application software development for this new kind of infrastructure. Grid application programmers have to take into account several complicated aspects: distribution of data and computations, parallel computations on different sites and processors, heterogeneity of the involved computers, load balancing, etc. Grid programmers thus demand novel programming methodologies that abstract over such technical details while preserving the beneficial features of modern grid middleware. For this purpose, the authors introduce Higher-Order Components (HOCs). HOCs implement generic parallel/distributed processing patterns, together with the required middleware support, and they are offered to users via a high-level service interface. Users only have to provide the application-specific pieces of their programs as parameters, while low-level implementation details, such as the transfer of data across the grid, are handled by the HOCs. HOCs were developed within the CoreGRID European Network of Excellence and have become an optional extension of the popular Globus middleware. The book provides the reader with hands-on experience, describing a broad collection of example applications from various fields of science and engineering, including biology, physics, etc. The Java code for these examples is provided online, complementing the book. The expected application performance is studied and reported for extensive performance experiments on different testbeds, including grids with worldwide distribution. The book is targeted at graduate students, advanced professionals, and researchers in both academia and industry. Readers can raise their level of knowledge about methodologies for programming contemporary parallel and distributed systems, and, furthermore, they can gain practical experience in using distributed software. Practical examples show how the complementary online material can easily be adopted in various new projects. KW - Component-Based Development KW - Distributed Computing KW - Distributed Resource Management KW - Globus KW - Grid and Cloud Computing KW - Java KW - Middleware KW - Web Services KW - distributed systems KW - grid computing KW - load balancing KW - programming Y1 - 2009 SN - 978-3-642-00841-2 U6 - https://doi.org/10.1007/978-3-642-00841-2 PB - Springer CY - Berlin, Heidelberg ER - TY - JOUR A1 - Baumgarten, Bodo A1 - Dünnweber, Jan A1 - Kirsch, C. T1 - Report Big Data - Strukturierung von Tourismusdaten mit Hadoop BT - Reiseziele aus der Wolke JF - iX - Magazin für professionelle Informationstechnik N2 - Ein weitverbreitetes, unstrukturiertes Datenformat stellt Reiseveranstalter inzwischen vor technische und logistische Probleme. Abhilfe könnte ein neues Format in Zusammenarbeit mit Cloud-Techniken schaffen. Y1 - 2013 SN - 0935-9680 IS - 06 SP - 97 EP - 101 PB - heise CY - Hannover ER - TY - CHAP A1 - Reinhardt, Dominik A1 - Guntner, Maximilian A1 - Kucera, Markus A1 - Waas, Thomas A1 - Kuenhauser, Winfried T1 - Mapping CAN-to-ethernet communication channels within virtualized embedded environments T2 - IEEE International Symposium on Industrial Embedded Systems (SIES), 10th, 8-10 June 2015, Siegen, Germany N2 - Intelligent driver assistance systems and new infotainment innovations cause a rapidly growing demand of computing power. To satisfy that demand, the quantity of electronic control units in cars has increased dramatically. OEMs tackle that trend by consolidating software on powerful multicore hardware platforms. However, current software solutions are mostly static and designed to run on limited platforms. As promising operating system for automotive, Linux comes into consideration, which seems to scale better than already existing solutions. To ease the migration process of older software parts and guarantee freedom from interference according to ISO26262 between single software partitions, embedded hypervisors can achieve that requirements. Up to now, automotive systems are not developed to run within virtualized environments. Within this paper, we present an approach to map communication channels of virtual automotive ECUs and connect them with their already existing CAN interfaces. For our analysis, we use the Xen hypervisor. The focus for interaction between virtual machines is to use SocketCAN and given paravirtualized Ethernet drivers. Our goal is a non-intrusive software integration methodology. We keep the source code within software partitions as unmodified as possible. To benchmark our studies, we evaluate our implementation on the Intel i7 and the. KW - Software KW - Automotive engineering KW - Linux KW - Hardware KW - Vehicles KW - Logic gates KW - Routing Y1 - 2015 U6 - https://doi.org/10.1109/SIES.2015.7185064 SN - 2150-3109 PB - IEEE ER - TY - CHAP A1 - Brunner, Stefan A1 - Kucera, Markus A1 - Waas, Thomas T1 - Ontologies used in robotics BT - A survey with an outlook for automated driving T2 - IEEE International Conference on Vehicular Electronics and Safety (ICVES), 2017, Vienna, Austria N2 - Full autonomy of road vehicles is a major goal of the automotive industry. To reach such high autonomy it is necessary to provide an accurate and comprehensible situation description for the environment and the vehicle itself. A consistent depiction is essential to facilitate data exchange and communication between internal modules, e.g. collision check and environment model, as well as communication with further information sources like traffic participants vehicle to vehicle (V2V) or the infrastructure, e.g. smart traffic lights, road signs or radio traffic service (V2I). One necessary tool to create such a model could be an ontology which represents the given information and its dependencies. Initially this work provides a summary of given approaches in the literature for use of ontologies in robotics in general. Therefore approaches are stated sorted by application and task. Further approaches with focus on autonomous robots and in particular on autonomous vehicles are listed and described. Finally we give an outlook for further research topics in the domain of ontologies. KW - Ontologies KW - Autonomous vehicles KW - Service robots KW - Modeling KW - Cognition KW - Standards Y1 - 2017 U6 - https://doi.org/10.1109/ICVES.2017.7991905 PB - IEEE ER - TY - JOUR A1 - Klotz, Stefan A1 - Kratzer, Simon A1 - Westner, Markus A1 - Strahringer, Susanne T1 - Literary Sketches in Information Systems Research: Conceptualization and Guidance for Using Vignettes as a Narrative Form JF - Information Systems Management N2 - This paper analyzes the usage of vignettes as a narrative form in information systems (IS) research. A review of 48 papers from IS top journals with 119 vignettes exposes the versatile usage of vignettes as a narrative form and shows their usefulness in research communication. The paper conceptualizes vignette usage through a taxonomy and archetypes. To support the future dissemination of this useful narrative technique, it further derives recommendations and guidance for scholars. KW - vignette KW - taxonomy KW - archetype KW - vignette study Y1 - 2022 U6 - https://doi.org/10.1080/10580530.2021.1996661 SN - 1934-8703 VL - 39 IS - 4 SP - 345 EP - 362 PB - Taylor&Francis ER - TY - JOUR A1 - Bleninger, Sara A1 - Fürnrohr, Michael A1 - Kiesl, Hans A1 - Krämer, Walter A1 - Küchenhoff, Helmut A1 - Burgard, Jan Pablo A1 - Münnich, Ralf A1 - Rupp, Martin T1 - Kommentare und Erwiderung zu: Qualitätszielfunktionen für stark variierende Gemeindegrößen im Zensus 2021 JF - AStA Wirtschafts- und Sozialstatistisches Archiv N2 - Burgard et al. (2020) stellen in ihrem Artikel zu Qualitätszielfunktionen für stark variierende Gemeindegrößen im Zensus 2021 Erweiterungen der Stichproben- und Schätzmethoden des Zensus 2011 vor, die kleine Gemeinden unter 10.000 Einwohnern in den Entscheidungsprozess integrieren. Die Dringlichkeit zur Lösung dieses Problems wurde ebenso im Urteil des Bundesverfassungsgerichts zur Volkszählung 2011 festgestellt. Ziel dieser Erwiderung ist eine eingehende Diskussion der Ergebnisse des vorangegangenen Beitrags mit namhaften Experten auf diesem Gebiet. Insbesondere geht es um eine Einordnung des Artikels in den Wissenschaftskontext (Krämer), die Bedeutung von Nichtstichprobenfehlern für den Zensus (Küchenhoff), den Zensus aus Sicht der Amtsstatistik (Bleninger und Fürnrohr) sowie aus statistisch-methodischer Sicht (Kiesl). Darüber hinaus werden aktuelle Entwicklungen vorgestellt. T2 - Comments and rejoinder: quality measures respecting highly varying community sizes within the 2021 German Census KW - Zensus KW - Ermittlung der Einwohnerzahl KW - Qualitätsmessung KW - Optimale Allokation KW - Total Survey Error Y1 - 2020 U6 - https://doi.org/10.1007/s11943-019-00264-6 VL - 14 SP - 67 EP - 98 PB - Springer Nature ER - TY - JOUR A1 - Schiek, Roland A1 - Baronio, Fabio T1 - Spatial Akhmediev breathers and modulation instability growth-decay cycles in a quadratic optical medium JF - Physical Review Research N2 - We investigate the spatial nonlinear localization of light on a quasi-plane-wave background with a harmonic perturbation induced by modulation instability in a quadratic nonlinear optical medium. In particular, we demonstrate experimentally the excitation of deterministic Akhmediev breathers and thus the growth-decay dynamics of modulation instability in a LiNbO3 slab waveguide. The results should stimulate new interest in modulation instability, extreme events, turbulence, recurrence, and supercontinuum generation in quadratic nonlinear optics. Y1 - 2019 U6 - https://doi.org/10.1103/PhysRevResearch.1.032036 VL - 1 IS - 3 SP - 1 EP - 5 PB - American Physical Society ER - TY - JOUR A1 - Fuhrmann, Thomas T1 - Spherical lens aberration minimization method for short-range free-space light transmission JF - Optical Engineering N2 - Spherical aberrations of lenses lead to increased spot radii on the focal plane. Several methods, such as optimizing thickness and radii or building lens groups, are known to minimize these spherical aberrations. Here, an innovative method for spherical aberration minimization is introduced; it can be used for short-range free-space optical communication systems, such as unit power afocal relay trains, lens waveguides, and periodic lens systems. This spherical aberration compensation principle is based on the combination of two identical spherical convex lenses at an optimal distance. Due to the higher refractive power for rays with an larger axis distance, rays from the outer area of the first lens intersect the inner area of the second lens, and vice versa. With this setup, the radial refractive power deviation of the two lenses compensate each other. Analytic calculations and numerical simulations are done to confirm this behavior, and measurements using two symmetric spherical lenses with polymer optical fibers as light feed confirm the calculations. Simulations and measurements show a very good matching behavior except for an unknown systematic error. At a lens distance of 300 mm, the optical attenuation decreased by ∼2 dB compared with a very small lens distance. This leads to the conclusion that this proposed spherical aberration minimization method works as theoretically predicted. KW - Monochromatic aberrations KW - Signal attenuation KW - Spherical lenses KW - Polymer optical fibers KW - Monte Carlo methods KW - Free space optics KW - Optical testing KW - Distance measurement KW - Optical engineering KW - Optical simulations Y1 - 2022 U6 - https://doi.org/10.1117/1.OE.61.8.085101 SN - 1560-2303 SN - 0036-1860 SN - 0091-3286 VL - 61 IS - 8 PB - SPIE CY - Bellingham, Wash. ER - TY - CHAP A1 - Sefl, Ondrej A1 - Prochazka, Radek A1 - Haller, Rainer A1 - Monkman, Gareth J. T1 - Alternative Approach to Optical Detection of Partial Discharges in Air T2 - 2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP): 12-15 Dec. 2021, Vancouver, BC, Canada N2 - This article compares the standard electrical method of partial discharge detection with a novel optical detection method based on silicon photomultipliers. A third, complementary, single-loop antenna method is added to represent the ultra-high frequency method commonly used in gas-insulated switchgear/lines. A trio of air-insulated electrode designs that simulate the fundamental fault/discharge types in gaseous insulation (protrusion – corona discharge, floating conductive particle, surface discharges) are employed. Phase-resolved partial discharge activity patterns are compiled for each electrode design. The patterns are analyzed using spatial statistics and the interpretation of the obtained data trends explained by means of an example. Ultimately, the consistency and reliability of discharge detection by the optical methods for each fault/discharge type are evaluated, and suggestions for improvement are made. KW - gas insulated switchgear KW - loop antennas KW - partial discharges KW - photomultipliers KW - reliability KW - statistical analysis KW - surface discharges Y1 - 2021 SN - 978-1-6654-1907-9 U6 - https://doi.org/10.1109/CEIDP50766.2021.9705350 SN - 2576-2397 SP - 324 EP - 327 PB - IEEE ER - TY - JOUR A1 - Jain, Brijnesh T1 - Warped softmax regression for time series classification JF - Knowledge and information systems N2 - Linear models are a mainstay in statistical pattern recognition but do not play a role in time series classification, because they fail to account for temporal variations. To overcome this limitation, we combine linear models with dynamic time warping (dtw). We analyze the resulting warped-linear models theoretically and empirically. The three main theoretical results are (i) the Representation Theorem, (ii) the Matrix Complexity Lemma, and (iii) local Lipschitz continuity of the warped softmax function. The Representation Theorem roughly states that warped-linear models correspond to polytope classifiers in Euclidean spaces. This key result is useful because it simplifies analysis of warped-linear models. For example, it provides a geometric interpretation, points to the label dependency problem, and justifies application of warped-linear models not only on temporal but also on multivariate data. The Representation Theorem together with the Matrix Complexity Lemma reveals that warped-linear models implement a weight trick by weight selection and massive weight sharing. Local Lipschitz continuity of warped softmax functions admits a principled training of warped-linear models by stochastic subgradient methods. Empirical results show that replacing the inner product of linear models with a dtw-score substantially improves its predictive performance. The theoretical and empirical contributions of this article provide a simple and efficient first-trial alternative to nearest-neighbor methods and open up new perspectives for more sophisticated classifiers such as warped deep learning. KW - Dynamic time warping KW - Linear classifier KW - Softmax regression KW - Time series Y1 - 2021 U6 - https://doi.org/10.1007/s10115-020-01533-5 VL - 63 IS - 3 SP - 589 EP - 619 PB - Springer Nature ER - TY - CHAP A1 - Nayak, Shravan A1 - Schuler, Christian A1 - Saha, Debjoy A1 - Baumann, Timo ED - Tumuluri, Raj ED - Sebe, Nicu ED - Pingali, Gopal T1 - A Deep Dive Into Neural Synchrony Evaluation for Audio-visual Translation T2 - ICMI '22, Proceedings of the 2022 International Conference on Multimodal Interaction: November 7 - 11 2022, Bengaluru India N2 - We present a comprehensive analysis of the neural audio-visual synchrony evaluation tool SyncNet. We assess the agreement of SyncNet scores vis-a-vis human perception and whether we can use these as a reliable metric for evaluating audio-visual lip-synchrony in generation tasks with no ground truth reference audio-video pair. We further look into the underlying elements in audio and video which vitally affect synchrony using interpretable explanations from SyncNet predictions and analyse its susceptibility by introducing adversarial noise. SyncNet has been used in numerous papers on visually-grounded text-to-speech for scenarios such as dubbing. We focus on this scenario which features many local asynchronies (something that SyncNet isn’t made for). KW - audio-visual synchrony KW - speech-lip synchrony KW - dubbing Y1 - 2022 SN - 978-1-4503-9390-4 U6 - https://doi.org/10.1145/3536221.3556621 SP - 642 EP - 647 PB - Association for Computing Machinery CY - New York ER - TY - CHAP A1 - Cantalloube, Faustine A1 - Gomez-Gonzalez, Carlos A1 - Absil, Olivier A1 - Cantero, Carles A1 - Bacher, Regis A1 - Bonse, Markus A1 - Bottom, Michael A1 - Dahlqvist, Carl-Henrik A1 - Desgrange, Célia A1 - Flasseur, Olivier A1 - Fuhrmann, Thomas A1 - Henning, Thomas H. A1 - Jensen-Clem, Rebecca A1 - Kenworthy, Matthew A1 - Mawet, Dimitri A1 - Mesa, Dino A1 - Meshkat, Tiffany A1 - Mouillet, David A1 - Müller, André A1 - Nasedkin, Evert A1 - Pairet, Benoit A1 - Piérard, Sébastien A1 - Ruffio, Jean-Baptiste A1 - Samland, Matthias A1 - Stone, Jordan A1 - van Droogenbroeck, Marc ED - Schmidt, Dirk ED - Schreiber, Laura ED - Vernet, Elise T1 - Exoplanet imaging data challenge: benchmarking the various image processing methods for exoplanet detection T2 - Adaptive Optics Systems VII : 14-22 December 2020, online only, United States N2 - The Exoplanet Imaging Data Challenge is a community-wide effort meant to offer a platform for a fair and common comparison of image processing methods designed for exoplanet direct detection. For this purpose, it gathers on a dedicated repository (Zenodo), data from several high-contrast ground-based instruments worldwide in which we injected synthetic planetary signals. The data challenge is hosted on the CodaLab competition platform, where participants can upload their results. The specifications of the data challenge are published on our website https://exoplanet-imaging-challenge.github.io/. The first phase, launched on the 1st of September 2019 and closed on the 1st of October 2020, consisted in detecting point sources in two types of common data-set in the field of high-contrast imaging: data taken in pupil-tracking mode at one wavelength (subchallenge 1, also referred to as ADI) and multispectral data taken in pupil-tracking mode (subchallenge 2, also referred to as ADI+mSDI). In this paper, we describe the approach, organisational lessons-learnt and current limitations of the data challenge, as well as preliminary results of the participants’ submissions for this first phase. In the future, we plan to provide permanent access to the standard library of data sets and metrics, in order to guide the validation and support the publications of innovative image processing algorithms dedicated to high-contrast imaging of planetary systems. Y1 - 2020 SN - 9781510636835 U6 - https://doi.org/10.1117/12.2574803 PB - SPIE ER - TY - CHAP A1 - De, Sangita A1 - Mottok, Jürgen A1 - Niklas, Michael A1 - Brada, Premek ED - Trinitis, Carsten ED - Pionteck, Thilo T1 - Semantic Synergy Exploration in Interface Description Models of Heterogeneous Vehicle Frameworks: Towards Automotive Meta Interface Description Model T2 - ARCS 2019: 32nd GI/ITG International Conference on Architecture of Computing Systems May 20 - 21, 2019, Technical University of Denmark, Copenhagen, Denmark Workshop, Proceedings N2 - This The vehicle is evolving to a complex network of heterogeneous subsystems of ECUs, sensors and actuators, each with different computational requirements. These sub-systems are connected via bus systems following different communication paradigms like e.g. signal based or service-oriented communications. This has led to the heterogeneous syntax of describing interfaces even though the semantics of the interfaces are similar. The wide variety of Interface Description Languages (IDLs) in automotive industry hinders partly with the efficient collaboration between different suppliers and the OEMs in the automotive industry. Given this wide variety of automotive IDLs, what could be more beneficial, from a software engineering point of view, is a generic automotive domain specific IDL that can satisfy all the fundamental requirements of the heterogeneous subsystems. This paper describes an approach to compare and correlate IDLs based on semantic similarities of the languages, considering the two aspects: application description and underlying message frameworks used in the different domains of given automotive subsystems. With the exploration of semantic synergies between the IDLs, various domain specific and domain-agnostic frameworks can be compared and correlated. The results can be generalized and abstracted to define a generic Meta IDL which could support use cases like e.g. domain-agnostic functional models and migration of software components between different kinds of automotive subsystems. Y1 - 2019 UR - https://ieeexplore.ieee.org/document/8836199 SN - 978-3-8007-4957-7 SP - 63 EP - 70 PB - VDE VERLAG CY - Berlin ER - TY - CHAP A1 - Thomeczek, Ludwig A1 - Attenberger, Andreas A1 - Kolb, Johannes A1 - Matoušek, Vaclav A1 - Mottok, Jürgen ED - Trinitis, Carsten ED - Pionteck, Thilo T1 - Measuring Safety Critical Latency Sources using Linux Kernel eBPF Tracing T2 - ARCS 2019: 32nd International Conference on Architecture of Computing Systems : workshop proceedings, May 20- 21, 2019, Technical University of Denmark, Copenhagen, Denmark Y1 - 2019 UR - https://ieeexplore.ieee.org/abstract/document/8836200 SN - 978-3-8007-4957-7 PB - VDE VERLAG GMBH CY - Berlin ER - TY - JOUR A1 - Weiss, Nils A1 - Pozzobon, Enrico A1 - Mottok, Jürgen A1 - Matoušek, Václav T1 - Automated Reverse Engineering of CAN Protocols JF - Neural Network World N2 - Car manufacturers define proprietary protocols to be used inside their vehicular networks, which are kept an industrial secret, therefore impeding independent researchers from extracting information from these networks. This article describes a statistical and a neural network approach that allows reverse engineering proprietary controller area network (CAN)-protocols assuming they were designed using the data base CAN (DBC) file format. The proposed algorithms are tested with CAN traces taken from a real car. We show that our approaches can correctly reverse engineer CAN messages in an automated manner. Y1 - 2021 U6 - https://doi.org/10.14311/NNW.2021.31.015 SN - 1210-0552 VL - 31 IS - 4 SP - 279 EP - 295 ER - TY - JOUR A1 - Maas, Roland A1 - Huemmer, Christian A1 - Sehr, Armin A1 - Kellermann, Walter T1 - A Bayesian view on acoustic model-based techniques for robust speech recognition JF - EURASIP Journal on Advances in Signal Processing N2 - This article provides a unifying Bayesian view on various approaches for acoustic model adaptation, missing feature, and uncertainty decoding that are well-known in the literature of robust automatic speech recognition. The representatives of these classes can often be deduced from a Bayesian network that extends the conventional hidden Markov models used in speech recognition. These extensions, in turn, can in many cases be motivated from an underlying observation model that relates clean and distorted feature vectors. By identifying and converting the observation models into a Bayesian network representation, we formulate the corresponding compensation rules. We thus summarize the various approaches as approximations or modifications of the same Bayesian decoding rule leading to a unified view on known derivations as well as to new formulations for certain approaches. KW - APPROXIMATION KW - Bayesian network KW - CLASSIFICATION KW - COMPENSATION KW - FEATURE ENHANCEMENT KW - HMM ADAPTATION KW - LINEAR-REGRESSION KW - Missing feature KW - Model adaptation KW - PREDICTION KW - Reverberation KW - Robust automatic speech recognition KW - SUM KW - Uncertainty decoding Y1 - 2015 U6 - https://doi.org/10.1186/s13634-015-0287-x VL - 103 PB - Springer Nature ER - TY - JOUR A1 - Scherzinger, Stefanie A1 - Thor, Andreas T1 - Cloud-Technologien in der Hochschullehre – Pflicht oder Kür? JF - Datenbank-Spektrum N2 - Ein eigenes Themenheft zum Datenmanagement in der Cloud dient uns als Anlass, die Präsenz von Cloud-Themen in der akademischen Datenbanklehre zu erfassen. In diesem Artikel geben wir die Ergebnisse einer Umfrage innerhalb der Fachgruppe Datenbanksysteme durch den Arbeitskreis Datenmanagement in der Cloud wieder. Dozentinnen und Dozenten von über zwanzig Hochschulen nahmen an der Umfrage teil. Es zeigt sich deutlich, dass sich das Thema „Cloud“ in der Hochschullehre zunehmend etabliert, jedoch überwiegend als ergänzendes Angebot, und seltener in der grundständigen Lehre verankert. Wir fassen die Ergebnisse unserer Umfrage zusammen und wagen Deutungsversuche. KW - Cloud Computing KW - Hochschullehre Y1 - 2014 U6 - https://doi.org/10.1007/s13222-014-0161-2 VL - 14 IS - 2 SP - 131 EP - 134 PB - Springer Nature ER -