Browsing by Author "Sowoidnich, Yannic"

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    Analysis and comparison of software-tools for cognitive assessment
    (2015) Tso, Leslie; Papagrigoriou, Christos; Sowoidnich, Yannic
    Due to the rising number of impaired and elder persons, it has become crucial that we find methods where we can easily and quickly integrate them into the workforce and by extension, society. This paper focuses on the analysis and comparison of three software-tools that assess the cognitive ability of people with impairments. The three software-tools are GATRAS by the University of Stuttgart, CogState by CogState Research and the computer-based tests from the hamet e by the Berufsbildungswerk Waiblingen. This paper will give a detailed description and comparison of each software and their features. In addition, the software-tools will be tested in a study with 20 participants in conjunction with the Gemeinnützige Werkstätten und Wohnstätten GmbH (GWW) in Sindelfingen. However, due to time constraints, not all games will be tested but the recommended battery of tests from each software will be used for the study.
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    Concept for executing management operations on components of application instances
    (2019) Sowoidnich, Yannic
    A large field of technologies exist for orchestrating cloud applications. Many of them focus on automated deployment techniques, rather than continous management of application instances. Executing operations for deploying applications is different from executing management operations, due to their dependencies to the application state. Proper state management is important to guarantee valid execution of management operations. Cloud providers such as Amazon have embedded functions for managing cloud applications, but they come with major drawbacks. They increase vendor-dependency and they do not support multi-cloud deployments. Technologies like Chef, Puppet or Terraform work with declarative process models, which cannot be used for non-state-changing operations and they mostly only allow simple operations. It is impossible to execute more customized fine grained operations with those technologies. Also, most of these management tools only support executing operations on the whole application, not on specific components of the application. The objective of this thesis is to find a way for executing management operations on running application instances by combining the information of the deployment model with the instance model of the application. The conceptual approach proposed in this thesis will consider and solve above addressed issues, as well as ensuring proper state management of application instances. The practical feasibility of this concept is validated by a prototypical implementation based on the TOSCA standard and the OpenTOSCA ecosystem.
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    Entwicklung eines Eclipse-Plugin für die erweiterte Methode von STPA
    (2015) Sowoidnich, Yannic
    Heutige Softwaresysteme werden immer größer und komplexer. Dieser Umstand macht es erforderlich eine zuverlässige Methode zu haben, diese Systeme auf Fehlverhalten oder auf gefährdende Situationen für Menschen zu untersuchen. Diese Arbeit versucht ein Werkzeug zu erstellen, welches zukünftige Unfall- und Sicherheitsanalysen dabei unterstützen kann, die untersuchten Systeme so sicher wie möglich zu gestalten. Die Software wird ein Plugin für die von der Universität entwickelte „XSTAMPP Plattform“, und versucht somit dessen Funktionalität zu erweitern. Dafür wird die erweiterte Methode von STPA als Funktionalität in das Plugin integriert (basierend auf der Arbeit von John Thomas), sowie einige Verbesserungen welche dabei helfen sollen, den Analyseprozess zu automatisieren (basierend auf der Arbeit von Asim Abdulhaleq). Dieses Dokument beschreibt aus welchen Gründen das neue Tool nützlich und erforderlich ist. Außerdem dokumentiert es den Entwicklungsprozess der neuen Software.