Stress inside the chip results into deviations of the transistor performance. In this thesis, micromechanical indentation is introduced to study stress effects on the electrical characteristics of CMOS transistors. The approach combines non-destructive indentation to induce well defined localized stress, electrical characterization of ring oscillator circuits under load as well as finite element simulations to estimate the introduced stress.

Nicht nur der Einzug von Hyperscalern wie Amazon, Google und Microsoft in das Produktionsumfeld, sondern auch Trends wie Industrie 4.0 zeigen die wachsende Bedeutung von IT-Technologien auf dem Shopfloor. Die Notwendigkeit flexibler Systeme zur Verwaltung von Betriebsmitteln und Produktionsressourcen wächst bei zeitgleichem Wachstum von Vernetzung und steigender Anzahl an Geräten durch den Einzug von Industrial IoT.

This work provides means for a better understanding of the actions involved in the software testing of concurrent embedded systems. It complements the existing approaches for concurrency bug dynamic analysis with models of concurrency limitations present in the embedded systems domain and improves their precision, where the main evaluation criterion is the number of false positives.

Der vorliegende Band 7 »Beschäftigteninteressen und Regulierungsbedarfe bei KI-Anwendungen« diskutiert Künstliche Intelligenz (KI) aus der Beschäftigtenperspektive. Die Anforderungen der Operative sowie der Handlungs- und Gestaltungsrahmen betrieblicher Interessenvertretungen verdeutlichen, dass ein dem Leitbild »menschenzentrierte KI« folgender Technikeinsatz proaktive und prozessbegleitende Mitbestimmungs- und Beteiligungsformate erfordert.

Perovskite solar cells (PSCs) are gaining increasing importance and attention in the last decade. Even though high conversion efficiencies have been reached, one of the major bottlenecks for the commercialization of PSCs is their stability. Issues at the interfaces in the multilayered PSC architecture are suspected to be the significant contributor in causing low stability. This doctoral thesis focusses on the analysis of various interfaces present in PSCs and traces methods to improve them. The investigation of individual interfaces is performed by developing suitable sub-cells, i.e., comprising only the particular interface of interest. Various optical and structural characterization methods are used to determine layer and interface properties. After this step, complete devices are manufactured from the sub-cells, and their final performance is investigated to conclude the role and optimization of the interfaces. The thesis accounts for the analysis of the interfacial quality of different in-room ambient processed n-i-p perovskite solar cells configurations, being based on hole-transport-layer (HTL)/Au or HTL-free/carbon-graphite (CG) electrodes. The findings show that developing suitable sub-cells allows to investigate the quality of the various interfaces of PSCs individually. Results from the sub-cell analysis are compared with the performance of complete devices to verify their significance. Thereby, methods to improve the interfaces can be found to achieve higher device efficiencies without compromising its stability.

The worldwide market of terminal operating systems is very heterogeneous. It is characterised by many providers offering more than one product each. The range of functions of each product is diverse depending on its scope and purpose. This market survey is supposed to enable the public to gain more insight into the market. Therefore, public information as well as information derived from a survey questionnaire has been evaluated.