@article{RevinaAksu2023, author = {Revina, Aleksandra and Aksu, {\"U}nal}, title = {An approach for analyzing business process execution complexity based on textual data and event log}, series = {Information Systems}, journal = {Information Systems}, number = {114}, publisher = {Elsevier}, doi = {10.1016/j.is.2023.102184}, year = {2023}, abstract = {With the advent of digital transformation, organizations increasingly rely on various information systems to support their business processes (BPs). Recorded data, including textual data and event log, expand exponentially, complicating decision-making and posing new challenges for BP complexity analysis in Business Process Management (BPM). Herein, Process Mining (PM) serves to derive insights based on historic BP execution data, called event log. However, in PM, textual data is often neglected or limited to BP descriptions. Therefore, in this study, we propose a novel approach for analyzing BP execution complexity by combining textual data serving as an input at the BP start and event log. The approach is aimed at studying the connection between complexities obtained from these two data types. For textual data-based complexity, the approach employs a set of linguistic features. In our previous work, we have explored the design of linguistic features favorable for BP execution complexity prediction. Accordingly, we adapt and incorporate them into the proposed approach. Using these features, various machine learning techniques are applied to predict textual data-based complexity. Moreover, in this prediction, we show the adequacy of our linguistic features, which outperformed the linguistic features of a widely-used text analysis technique. To calculate event log-based complexity, the event log and relevant complexity metrics are used. Afterward, a correlation analysis of two complexities and an analysis of the significant differences in correlations are performed. The results serve to derive recommendations and insights for BP improvement. We apply the approach in the IT ticket handling process of the IT department of an academic institution. Our findings show that the suggested approach enables a comprehensive identification of BP redesign and improvement opportunities.}, language = {en} } @article{XuShimizuGuterdingetal.2023, author = {Xu, Han-Xiang and Shimizu, Makoto and Guterding, Daniel and Otsuki, Junya and Jeschke, Harald O.}, title = {Pressure evolution of electronic structure and magnetism in the layered van der Waals ferromagnet CrGeTe3}, series = {Physical Review B}, journal = {Physical Review B}, number = {Vol. 108}, publisher = {American Physical Society}, doi = {https://doi.org/10.1103/PhysRevB.108.125142}, pages = {15}, year = {2023}, abstract = {Layered van der Waals ferromagnets, which preserve their magnetic properties down to exfoliated monolayers, are fueling an abundance of fundamental research and nanoscale device demonstration. CrGeTe3 is a prime example of this class of materials. Its temperature-pressure phase diagram features an insulator-to-metal transition and a significant increase in ferromagnetic Curie-Weiss temperatures upon entering the metallic state. We use density functional theory to understand the magnetic exchange interactions in CrGeTe3 at ambient and elevated pressures. We calculate Heisenberg exchange couplings, which provide the correct ferromagnetic ground state and explain the experimentally observed pressure dependence of magnetism in CrGeTe3. Furthermore, we combine density functional theory with dynamical mean-field theory to investigate the effects of electronic correlations and the nature of the high-pressure metallic state in CrGeTe3.}, language = {en} } @article{ChaurasiaGoeckeDe2023, author = {Chaurasia, Prashant Kumar and Goecke, Sven Frithjof and De, Amitava}, title = {Towards real-time monitoring of metal transfer and melt pool temperature field in gas metal arc directed energy deposition}, series = {Welding in the World}, journal = {Welding in the World}, number = {67}, publisher = {Springer Link}, doi = {https://doi.org/10.1007/s40194-023-01534-2}, pages = {1781 -- 1791}, year = {2023}, abstract = {Large three-dimensional metallic parts can be printed layer-by-layer using gas metal arc directed energy deposition (GMA-DED) process at a high deposition rate and with little or no material wastage. Fast responsive real-time monitoring of GMA-DED process signatures and their transient variations is required for printing of dimensionally accurate and structurally sound parts. A systematic experimental investigation is presented here on multi-layer GMA-DED with two different scanning strategies using a high strength low alloy (HSLA) filler wire. The dynamic metal transfer, melt pool temperature field and its longitudinal cross-section, and arc voltage and current are monitored synchronously. The transient arc heat input and the melt pool solidification cooling rate are estimated from the monitored signals. The layer-wise variations of the melt pool dimension, surface temperature profile, thermal cycles, and solidification cooling rate are examined for different scanning strategies. It is comprehended that the part defects can be minimized, and the mass production of zero-defect parts can be achieved in GMA-DED process with synchronized monitoring and assessment of the real-time process signatures.}, language = {en} } @inproceedings{KantJohannsen2020, author = {Kant, Daniel and Johannsen, Andreas}, title = {Exemplarische API-Schwachstellen bei IoT-Ger{\"a}ten auf Grundlage von OWASP API Security TOP 10}, series = {Konferenz: Evaluation of Service APIs (ESAPI), D{\"u}ren, 2020/ Band: ESAPI 2020: 4. Workshop Evaluation of Service-APIs}, booktitle = {Konferenz: Evaluation of Service APIs (ESAPI), D{\"u}ren, 2020/ Band: ESAPI 2020: 4. Workshop Evaluation of Service-APIs}, editor = {Nadobny, Konrad and Schmietendorf, Andreas}, publisher = {Shaker}, address = {D{\"u}ren}, isbn = {978-3-8440-7515-1}, pages = {75 -- 88}, year = {2020}, language = {de} } @inproceedings{MuellerDobkowiczJohannsenetal.2020, author = {M{\"u}ller, Maximilian and Dobkowicz, Matthias and Johannsen, Andreas and Fodi, Allan Christian}, title = {Konzeption eines Objektkonfigurators zur Erstellung von Ausz{\"u}gen einer Objektbibliothek}, series = {Konferenz: Evaluation of Service APIs (ESAPI), Shaker, D{\"u}ren/ Band: ESAPI 2020: 4. Workshop Evaluation of Service-APIs}, booktitle = {Konferenz: Evaluation of Service APIs (ESAPI), Shaker, D{\"u}ren/ Band: ESAPI 2020: 4. Workshop Evaluation of Service-APIs}, editor = {Nadobny, Konrad and Schmietendorf, Andreas}, publisher = {Shaker}, address = {D{\"u}ren}, isbn = {978-3-8440-7515-1}, pages = {111 -- 124}, year = {2020}, language = {de} } @article{FranzKhatami2020, author = {Franz, Robert U. and Khatami, Pouyan}, title = {SAP-Ausbildung - Digitalisierung und Pandemie als Herausforderung}, series = {ERP Management}, journal = {ERP Management}, number = {16/2020}, publisher = {GITO mbH Verlag}, issn = {1860-6725}, doi = {10.30844/ERP_20-4_53-55}, pages = {53 -- 55}, year = {2020}, abstract = {Unternehmen und Unternehmens-IT stehen im Zeitalter der Digitalisierung vor großen Umbr{\"u}chen. Gesch{\"a}ftsprozesse und die eingesetzten IT-Systemlandschaften ver{\"a}ndern sich im schnellen Takt, teilweise werden erprobte Gesch{\"a}ftsmodelle disruptiv durch v{\"o}llig neue Technologien erg{\"a}nzt oder gar ersetzt. Dieses schnelllebige Umfeld erfordert eine intensive und qualitativ hochwertige Ausbildung der Mitarbeiter. Pr{\"a}senzschulungen sind in Zeiten der Corona-Pandemie aber schwer zu realisieren. Wie eine praxisnahe und Fallstudien-basierte Ausbildung im ERP-Kontext trotzdem m{\"o}glich ist, zeigt das E-Learning-basierte Programm erp4students der Technischen Hochschule Brandenburg am Beispiel von 13 Modulen im Umfeld neuester SAP-Technologien.}, language = {de} } @incollection{Eichstaedt2020, author = {Eichst{\"a}dt, Justus}, title = {Rathenow: Wiege der optischen Industrie}, series = {Rathenow: Wiege der optischen Industrie: zur Entwicklung der Rathenower optischen Industrie von ihren Anf{\"a}ngen bis zur Gegenwart}, booktitle = {Rathenow: Wiege der optischen Industrie: zur Entwicklung der Rathenower optischen Industrie von ihren Anf{\"a}ngen bis zur Gegenwart}, editor = {G{\"o}tze, Bettina and Mertens, Joachim}, edition = {1.}, publisher = {VBB, Verlag f{\"u}r Berlin-Brandenburg}, address = {Berlin}, isbn = {978-3-947215-67-6}, year = {2020}, language = {de} } @incollection{Brasche2020, author = {Brasche, Ulrich}, title = {Getrennt und doch gemeinsam - Wie sich die EU aus der Falle der Einstimmigkeit befreien kann}, series = {Europ{\"a}ische Integration: Aktualisierungen Wirtschaft, Euro-Krise, BREXIT, Erweiterung und Perspektiven}, booktitle = {Europ{\"a}ische Integration: Aktualisierungen Wirtschaft, Euro-Krise, BREXIT, Erweiterung und Perspektiven}, edition = {4.}, year = {2020}, language = {de} } @article{Brasche2020, author = {Brasche, Ulrich}, title = {Ever Closer Union? Wie sich die EU produktiv weiterentwickeln kann}, series = {Aus Politik und Zeitgeschichte}, journal = {Aus Politik und Zeitgeschichte}, number = {2020}, publisher = {Societ{\"a}ts-Verlag}, issn = {0479-611X (PRINT); 2194-3621 (ONLINE)}, pages = {23 -- 25}, year = {2020}, language = {de} } @article{Blasek2020, author = {Blasek, Katrin}, title = {Auf unsicherem Terrain - Datenverarbeitung durch den Beirat}, series = {Zeitschrift f{\"u}r Wohnungseigentumsrecht}, journal = {Zeitschrift f{\"u}r Wohnungseigentumsrecht}, number = {2020}, publisher = {C.H. Beck}, issn = {1611-8650}, year = {2020}, language = {de} } @article{CreutzburgHagenHasche2022, author = {Creutzburg, Reiner and Hagen, Dirk and Hasche, Eberhard}, title = {Application scenarios and usability for modern 360 degree video projection rooms in the MICE industry}, series = {Electronic Imaging}, journal = {Electronic Imaging}, number = {3}, publisher = {Society for Imaging Science and Technology (IS\&T)}, issn = {2470-1173}, doi = {10.2352/EI.2022.34.3.MOBMU-401}, pages = {401 - 1 -- 401 - 9}, year = {2022}, abstract = {360-degree image and movie content has gained popularity over the media and the MICE (Meeting, Incentive, Conventions, and Exhibitions) industry in the last few years. There are three main reasons for this development. First, on the one hand, it is the immersive character of this media form, and, on the other hand, the development of recording and presentation technology has made significant progress in terms of resolution and quality. Third, after a decade of dynamic rising, the MICE Industry focuses on a disruptive change for more digital-based solutions. 360-degree panoramas are particularly widespread in VR and AR technology. However, despite the high immersive potential, these forms of presentation have the disadvantage that the users are isolated and have no social contact during the performance. Therefore, efforts have been made to project 360-degree content in specially equipped rooms or planetariums to enable a shared experience for the audience. One application area for 360-degree panoramas and films is conference rooms in hotels, conference centers, and any other venues that create an immersive environment for their clients to stimulate creativity. This work aims to overview the various application scenarios and usability possibilities for such conference rooms. In particular, we consider applications in construction, control, tourism, medicine, art exhibition, architecture, music performance, education, partying, organizing and carrying out events, and video conferencing. These applications and use scenarios were successfully tested, implemented, and evaluated in the 360-degree conference room "Dortmund" in the Hotel Park Soltau in Soltau, Germany. Finally, the advantages, challenges, and limitations of the proposed method are described.}, language = {en} } @inproceedings{CreutzburgHagenHasche2022, author = {Creutzburg, Reiner and Hagen, Dirk and Hasche, Eberhard}, title = {Application scenarios and usability for modern 360 degree video projection rooms in modern meeting, incentive, conventions, and exhibitions (MICE) industry}, series = {Konferenz: SPIE Defence and Commercial Sensing Industry, Orlando, United States, 2022/ Band: PROCEEDINGS VOLUME PC12100 SPIE DEFENSE + COMMERCIAL SENSING | 3 APRIL - 13 JUNE 2022 Multimodal Image Exploitation and Learning 2022}, booktitle = {Konferenz: SPIE Defence and Commercial Sensing Industry, Orlando, United States, 2022/ Band: PROCEEDINGS VOLUME PC12100 SPIE DEFENSE + COMMERCIAL SENSING | 3 APRIL - 13 JUNE 2022 Multimodal Image Exploitation and Learning 2022}, editor = {Agaian, Sos and Jassim, Sabah and DelMarco, Stephen and Asari, Vijayan K.}, publisher = {SPIE - The International Society for Optics and Photonics}, address = {Orlando, United States}, isbn = {978-1-5106-5617-8}, doi = {10.1117/12.2618848}, pages = {13}, year = {2022}, language = {en} } @inproceedings{JohannsenMaurerStockhausen2022, author = {Johannsen, Andreas and Maurer, Robert and Stockhausen, Pablo}, title = {Konzeption eines Machine-Learning-Verfahrens zum L{\"o}sen von Green Vehicle Routing Problemen.}, series = {Konferenz: Jahrestagung des Arbeitskreises Wirtschaftsinformatik an Hochschulen f{\"u}r Angewandte Wissenschaften im deutschsprachigen Raum (AKWI), Berlin, 2022/ Konferenzband: Angewandte Forschung in der Wirtschaftsinformatik 2022: Tagungsband zur 35. Jahrestagung des Arbeitskreises Wirtschaftsinformatik an Hochschulen f{\"u}r Angewandte Wissenschaften im deutschsprachigen Raum (AKWI) vom 11.09. bis 13.09.2022, ausgerichtet von der Hochschule f{\"u}r Technik und Wirtschaft Berlin (HTW Berlin) und der Hochschule f{\"u}r Wirtschaft und Recht Berlin (HWR Berlin)}, booktitle = {Konferenz: Jahrestagung des Arbeitskreises Wirtschaftsinformatik an Hochschulen f{\"u}r Angewandte Wissenschaften im deutschsprachigen Raum (AKWI), Berlin, 2022/ Konferenzband: Angewandte Forschung in der Wirtschaftsinformatik 2022: Tagungsband zur 35. Jahrestagung des Arbeitskreises Wirtschaftsinformatik an Hochschulen f{\"u}r Angewandte Wissenschaften im deutschsprachigen Raum (AKWI) vom 11.09. bis 13.09.2022, ausgerichtet von der Hochschule f{\"u}r Technik und Wirtschaft Berlin (HTW Berlin) und der Hochschule f{\"u}r Wirtschaft und Recht Berlin (HWR Berlin)}, editor = {Wolf, Martin}, publisher = {GITO}, address = {Berlin}, isbn = {978-3-95545-409-8}, doi = {10.30844/AKWI_2022_17}, pages = {398}, year = {2022}, language = {de} } @incollection{Levina2021, author = {Levina, Olga}, title = {Digitale Vernetzung in der E-Mobilit{\"a}t}, series = {Mobility2Grid - Sektoren{\"u}bergreifende Energie- und Verkehrswende}, booktitle = {Mobility2Grid - Sektoren{\"u}bergreifende Energie- und Verkehrswende}, publisher = {Springer Vieweg}, address = {Berlin, Heidelberg}, isbn = {978-3-662-62628-3}, doi = {10.1007/978-3-662-62629-0_5}, pages = {145 -- 179}, year = {2021}, language = {de} } @article{KantJohannsen2021, author = {Kant, Daniel and Johannsen, Andreas}, title = {Sicherer Datenaustausch in Kooperationen - „Kooperation first - Sicherheit second?"}, series = {Mittelstand-Digital Magazin - Wissenschaft trifft Praxis}, journal = {Mittelstand-Digital Magazin - Wissenschaft trifft Praxis}, number = {2021/16}, publisher = {Begleitforschung Mittelstand-Digital}, pages = {41 -- 46}, year = {2021}, language = {de} } @article{KoldeweijKantHarthetal.2021, author = {Koldeweij, Robin B. J. and Kant, Pallav and Harth, Kirsten and Ruiter, Rielle de and Gelderblom, Hanneke and Snoeijer, Jacco H. and Lohse, Detlef and Limbeek, Michiel A. J. van}, title = {Initial solidification dynamics of spreading droplets}, series = {Physical Review Fluids}, journal = {Physical Review Fluids}, number = {12}, publisher = {American Physical Society}, issn = {2469-990X}, doi = {10.1103/PhysRevFluids.6.L121601}, year = {2021}, abstract = {When a droplet is brought in contact with an undercooled surface, it wets the substrate and solidifies at the same time. The interplay between the phase transition effects and the contact-line motion, leading to its arrest, remains poorly understood. Here we reveal the early solidification patterns and dynamics of spreading hexadecane droplets. Total internal reflection imaging is employed to temporally and spatially resolve the early solidification behavior. With this, we determine the conditions leading to the contact-line arrest. We quantify the overall nucleation behavior, i.e., the nucleation rate and the crystal growth speed and show its sensitivity to the applied undercooling of the substrate. We also show that for strong enough undercooling it is the rapid growth of the crystals which determines the eventual arrest of the spreading contact line. By combining the Johnson-Mehl-Avrami-Kolmogorov nucleation theory and scaling relations for the spreading, we calculate the temporal evolution of the solid area fraction, which is in good agreement with our observations.}, language = {en} } @article{DasGoeckeDe2021, author = {Das, Atanu and Goecke, Sven-Frithjof and De, Amitava}, title = {Joining of aluminium alloy and galvanized steel sheets multimaterial assembly using a gas metal arc based process}, series = {Tecnologia em Matalurgia, Materiais e Minera{\c{c}}{\~a}o}, journal = {Tecnologia em Matalurgia, Materiais e Minera{\c{c}}{\~a}o}, publisher = {ABM - Associa{\c{c}}{\~a}o Brasileira de Metalurgia, Materiais e Minera{\c{c}}{\~a}o}, issn = {2176-1515 (PRINT) 2176-1523 (ONLINE)}, doi = {10.4322/2176-1523.20212464}, year = {2021}, language = {en} } @techreport{ScheegScheegFitz2021, author = {Scheeg, Jochen and Scheeg, Michaela and Fitz, Lukas R. G.}, title = {"Ich will loslegen"-Studie: Wie ticken Unternehmen die digital loslegen wollen?}, pages = {48}, year = {2021}, abstract = {„Ich will loslegen!" (IWL). Dieser Ausruf spiegelt die Motivation der befragten Unternehmer*innen zu einem Zeitpunkt wider, an dem sie sich entschlossen haben, ein erstes oder neues Digitalisierungsprojekt zu initiieren. Um aktiv eine Unterst{\"u}tzung f{\"u}r das Vorhaben anzufragen, beantworteten kleinste, kleine und mittlere Unternehmen (KKMU) die 100 Fragen des IST-1-Fragebogens. Unsere IWL-Studie beinhaltet die Analyse der Antworten der Unternehmer*innen und erm{\"o}glicht neue Erkenntnisse. Sie zeigt Bed{\"u}rfnisse und Widerspr{\"u}che im Hinblick auf Digitalisierungsvorhaben auf. Wo setzen KKMU ihren Fokus, wie handeln sie und welche Potenziale und H{\"u}rden offenbaren sich im Kontext digitaler L{\"o}sungen? Die verschiedenen Punkte werden in der vorliegenden Fassung anhand von Hypothesen erl{\"a}utert und abschließend diskutiert.}, language = {de} } @article{Blasek2021, author = {Blasek, Katrin}, title = {Selbstbestimmte Identit{\"a}ten}, series = {Zeitschrift f{\"u}r das Recht der digitalen Wirtschaft (ZdiW)}, journal = {Zeitschrift f{\"u}r das Recht der digitalen Wirtschaft (ZdiW)}, number = {2021(8)}, publisher = {Wolters Kluwer}, issn = {2702-4040}, pages = {287}, year = {2021}, language = {de} } @article{Blasek2021, author = {Blasek, Katrin}, title = {Anordnung des HmbBfDI gegen Facebook - Dringlichkeitsanordnung statt Zusammenarbeit und Koh{\"a}renz?}, series = {Zeitschrift f{\"u}r Datenschutz Aktuell}, journal = {Zeitschrift f{\"u}r Datenschutz Aktuell}, publisher = {C.H. Beck}, issn = {2192-5593}, year = {2021}, language = {de} }