@masterthesis{Nolte, type = {Bachelor Thesis}, author = {Nolte, Johannes}, title = {Untersuchung der Vorgehensweise ausgew{\"a}hlter Internetplattformen gegen gef{\"a}lschte Online-Bewertungen}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:1383-opus4-2126}, school = {Hochschule Rhein-Waal}, pages = {52}, abstract = {Diese Arbeit dokumentiert ein Experiment zur Untersuchung des Umgangs von Facebook, Google Maps, Google Play Store und Zalando mit gef{\"a}lschten Bewertungen („Opinion Spam"). Es wurde untersucht, ob die Plattformen im Rahmen dieser Arbeit abgegebene gef{\"a}lschte Bewertungen ver{\"o}ffentlichen. Dazu wurden je Plattform 24 unterschiedlich authentisch wirkende Konten erstellt. Mit diesen wurden je 48 gef{\"a}lschte Bewertungen nach folgenden Kriterien abgegeben: 1) Kopierte Produkt-/Ortsbeschreibung oder Werbesprache 2) Aussagen ohne Produkt-/Ortsbezug oder inhaltliche Fehler 3) Blindtexte oder sehr viele Rechtschreibfehler 4) eine Meinung verkn{\"u}pft mit der Aussage, dass der Bewertende das Produkt/den Ort nicht kennt. Innerhalb von 14 Tagen wurde mehrmals {\"u}berpr{\"u}ft, ob eine Bewertung freigeschaltet oder gel{\"o}scht wurde. Bei Facebook wurden 6,7\% der abgegebenen Bewertungen innerhalb der ersten 14 Tage gel{\"o}scht. Nachdem die verbleibenden Bewertungen der Plattform gemeldet wurden, waren es 47,7\%. Bei Google Maps wurden 4,2\% entfernt, im Google Play Store 12,5\% (bei beiden keine {\"A}nderung durch Melden). Bei Zalando (kein Melden m{\"o}glich) war die eigenst{\"a}ndige L{\"o}schquote mit 43,8\% mit Abstand am h{\"o}chsten. Besonders h{\"a}ufig wurden im Experiment Blindtexte gel{\"o}scht. Positive und negative Bewertungen wurden nahezu gleich oft entfernt. Bewertungen von Konten mit simulierter Nutzerinteraktion wurden h{\"a}ufiger gel{\"o}scht als Bewertungen von Konten ohne Nutzerinteraktion. Das Experiment hat gezeigt, dass sehr viele gef{\"a}lschte Bewertungen, die eindeutig den Richtlinien der Plattformen widersprechen, nicht gel{\"o}scht wurden. Deren Sichtbarkeit variiert allerdings je nach Plattform und Produkt/Ort stark. Der Aufwand f{\"u}r die Erstellung vieler Konten bei den Diensten ist {\"u}berschaubar. Wenn Nutzer gef{\"a}lschte Bewertungen nach den im Experiment untersuchten Kriterien abgeben wollen, werden sie von den Plattformen daran wenig gehindert.}, language = {de} } @masterthesis{Dogotari, type = {Bachelor Thesis}, author = {Dogotari, Marcel}, title = {Hardware Design and RF Performance Evaluation of a Long Range 2.4 GHz Radio Module}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:1383-opus4-2158}, school = {Hochschule Rhein-Waal}, pages = {90}, abstract = {Low-power, long-range wireless solutions are needed for transmission of environmental and industrial monitoring data from remote, battery-driven sensors. Chirp spread spectrum (CSS) modulation techniques are able to meet these requirements. A CSS-based radio module was designed to operate in the 2.4 GHz frequency band, whose advantages are worldwide availability, lack of duty-cycle restrictions and a broad spectrum. The module's power consumption is satisfactory, but its range has to be improved. The accuracy of time-of-flight (ToF) distance estimation, an extra feature of the module, has not been evaluated. Impedance matching, transmission lines and printed circuit board design are among the practical aspects discussed, while ToF ranging and orthogonality of CSS signals are considered from a theoretical point of view.}, language = {en} } @masterthesis{Lam, type = {Bachelor Thesis}, author = {Lam, Hoi Ying}, title = {Radar Signal Distortion caused by Directional Vibration of a 24 GHz FMCW System}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:1383-opus4-2164}, school = {Hochschule Rhein-Waal}, pages = {102}, abstract = {This thesis is an initial attempt to investigate the influence of mechanical vibrations on the 24 GHz FMCW radar developed by IMST GmbH and develop a simple vibration compensation model for the human tracking algorithm. The project objectives are to determine the radar signal distortion caused by vibrations theoretically, conduct simulations to evaluate the effects of vibrations on the human tracking process, and develop a basic model to compensate the disturbing vibrations. The single radar pulse simulations conclude that when the radar is vibrating at a low frequency, the signal would not be distorted if the change of phase of the intermediate frequency is less than half a resolution cell. While the results from the multiple radar pulses simulations reveal that factors like the SNR value, vibrating amplitude and the target's velocity would influence the human tracking process. The higher the SNR value, vibrating amplitude and target's velocity, the more the detected ghost targets when there is only one target presence. A signal demodulation method is then proposed which indicate the possibility in reducing the disturbance caused by the vibrations.}, language = {en} } @masterthesis{Keiffenheim, type = {Bachelor Thesis}, author = {Keiffenheim, Jan}, title = {Die Produktion von Audiodateien und deren Einbindung in Videospiele}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:1383-opus4-3494}, school = {Hochschule Rhein-Waal}, pages = {54}, abstract = {In this paper the production of audio file will be shown with examples, and how these can be put exemplarily into a video game. For this purpose different types of programs will be presented which can produce audio file. To show a small expenditure, affordable or free programs will be used for this paper. After that the paper shows how to exemplarily record and edit music, sound and voice. Finally a game engine will be used to demonstrate the inset and programming of the created audio files. This paper is especially for newcomers (and students) to introduce them to audio and sound design. With the practical instructions in this paper they can start to produce audio files by their own.}, language = {de} } @masterthesis{Pruem, type = {Bachelor Thesis}, author = {Pr{\"u}m, Moritz}, title = {Automated Hyperspectral Field Scanner for Vegetation Monitoring}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:1383-opus4-2247}, school = {Hochschule Rhein-Waal}, pages = {57}, abstract = {Vegetation monitoring is an important tool in a variety of fields, e.g. precision agriculture and plants' phenotyping. The system design of existing non-invasive ground based systems is usually not open-source. Therefore, these systems cannot be reliably modified and thus are not suitable to advanced applications, such as prototyping of new sensors. This thesis describes the development of a ground based hyperspectral monitoring system for use in plant science and sensor testing. A well-documented and automated working prototype has been developed and initial tests show promising results. Further work in system modularity and redundancy is needed.}, language = {en} } @misc{Hoernschemeyer, type = {Master Thesis}, author = {H{\"o}rnschemeyer, Heike}, title = {Development of a Usability Capability Self-Assessment Tool for Improvement and Monitoring of Human-Centred Design in Small and Medium-Sized Companies}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:1383-opus4-2433}, school = {Hochschule Rhein-Waal}, pages = {86}, abstract = {Usability is an important quality aspect of software products. Today, companies need to be capable to develop software with good usability to stay competitive. This can be achieved by practicing human-centred design (HCD) during the development process. However, especially small and medium-sized software enterprises (SMEs) still practice HCD on a low level, if at all. This thesis explores whether and how the approach of process capability assessment can support SMEs with a systematic improvement of HCD. It is shown that a process capability assessment for usability at SMEs can only be successful, when the first steps of initiating HCD are al-ready done. Then, a process assessment approach seems to be useful to systematically improve the usability capability at SMEs. Based on this theoretical background, a usability capability self-assessment tool tailored for SMEs is developed. It has a simplified assessment procedure and uses the DIN EN ISO 9241-220 as reference model. The self-assessment tool was applied at two German software SMEs to test whether the approach is useful for SMEs and whether the reference model is suitable. The results indicate that the usability self-assessment tool is a promising approach for future SMEs as several interesting applications were identified. The chosen reference model seems to be an appropriate choice for a self-assessment; only the complex language used in the standard impedes the assessment. All in all, the thesis lays the foundation for a systematic approach to support SMEs with usability.}, language = {en} } @misc{Koch, type = {Master Thesis}, author = {Koch, Kerstin}, title = {How to communicate UX requirements? Guidelines based on a systematic literature review and interview study}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:1383-opus4-8843}, school = {Hochschule Rhein-Waal}, pages = {143}, abstract = {This thesis addresses the question of a suitable way to communicate user requirements to an interdisciplinary team. UX professionals are responsible for communicating user needs and UX requirements in a clear and understandable way so that other team members such as software developers can work in a user-centric way. The thesis examines known forms of requirements specification and identifies possible challenges in communicating user needs with the help of a systematic literature review. Based on design patterns, possible solutions for these problems are developed. In an interview study, these solution proposals are compared with real scenarios and adapted. As a result, the thesis presents nine guidelines that UX professionals can use to communicate user requirements. The idea is to promote a good exchange with the other team members and suitable, short forms of specification. A key point was that these should always convey a reason or the user's motivation for a requirement to provide meaningful context information to those who have never been in touch with the user.}, language = {en} } @misc{Shrestha, type = {Master Thesis}, author = {Shrestha, Manjil}, title = {Development of a Language Model for Medical Domain}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:1383-opus4-7405}, school = {Hochschule Rhein-Waal}, pages = {141}, abstract = {Language models are widely used as a representation of written language in various machine learning tasks, with the most commonly used model being Bidirectional Encoder Representations from Transformers (BERT). It was shown that the prediction quality strongly benefits from language model pre-training on domain-specific data. The publicly available models, though are always trained on Wikipedia, news or legal data, thereby missing the domain specific knowledge about medical terms. In this thesis, we will train a BERT language model on medical data and compare performance with domain-unspecific language models. The dataset used for this purpose is the Non-technical Summaries - International Statistical Classification of Diseases (NTS-ICD) task of classification of animal experiment descriptions into International Statistical Classification of Diseases (ICD) categories.}, language = {en} } @misc{Adebiyi, type = {Master Thesis}, author = {Adebiyi, Akinloluwa Iyanu}, title = {Combining User Experience Design \& Service Design: Theory meets Practice}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:1383-opus4-16337}, school = {Hochschule Rhein-Waal}, pages = {94}, abstract = {This thesis explores how UXD and SD can work together more seamlessly in practice. UXD and SD have a lot of similarities. This has led to confusion around the borders and overlaps of both fields. Therefore researchers called for more studies to clarify their relationship. Most recent studies suggested diverting from polishing single touchpoints; some studies and focussing on end-to-end journey and the customer. The thesis examines the underlying activities of existing theoretical approaches and the challenges of combining UXD and SD with the help of thematic analysis. A set of proposed strategies were developed based on a survey on current practices and challenges with practitioners and thematic analysis. As a result, the thesis presents four strategies that design teams can incorporate into their processes. The idea is to promote the creation of better quality products and services by harnessing the benefits of both fields. The key point was that these concepts are still broad and should be simplified into leaner modes that can be applied in daily activities.}, language = {en} } @masterthesis{Meyer, type = {Bachelor Thesis}, author = {Meyer, Tobias}, title = {Automatisierte Tests oberfl{\"a}chenbezogener Gesch{\"a}ftslogik mit simulierten Benutzereingaben}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:1383-opus4-8544}, school = {Hochschule Rhein-Waal}, pages = {64}, abstract = {A lack of stability and reliability in user interfaces leads to user dissatisfaction. If this dissatisfaction is a repeating occurence users loose trust in the software and the company behind it. In the long run this leads to a migration from existing users to competitors and less new customers. To combat these effects companies have to ensure their user interfaces are stable and reliable. The Schleupen AG provides a browserbased user interface to its customers, which is split into a display layer running in the browser and a logic layer running on the server. In this thesis an automated solution for finding such problems in the logic layer was developed and applied to a selected subset of user interfaces. The solution was able to find multiple issues with most of them representing possible stability problems. This showed that automated testing of user interfaces for stability and reliability is possible and worthwhile.}, language = {de} }