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Dissertation
High-Speed 1.55 µm Quantum Dot Lasers with Electronically Coupled Quantum Well - Dot Active Regions
(2019-07-31)
The expansion of long-distance data communication at a wavelength of 1.55 µm calls for larger data transfer rates. Consequently, an improvement of emission and modulation properties of lasers emitting in this wavelength region is of high interest. The utilization of so-called tunnel-injection (TI) structures in InP-based quantum dot (QD) lasers is promising to fulfill this task. The aim of this thesis was the realization and analysis of TI structures in the lattice matched InP material system and incorporation into ...
Dissertation
Effects of climate change on fungal community structure and organic matter turnover in soil profiles along elevation gradients in alpine ecosystems
(2019-10)
Although elevation patterns of diversity for plants and animals are well known, understanding of variations in fungal community structure along elevation gradients is limited. Soil fungi play an important role in soil microbial communities, where they improve soil organic matter (SOM) turnover and nutrient circulation. Hence, any change in fungal community structure will have strong effects on soil and ecosystem functioning. The main purpose of this thesis is therefore to investigate how climate induced shifts in ...
Aufsatz
Gelingensbedingungen zur Umsetzung eines Menschenrechts
(2019)
Das im vergangenen Jahr gestartete Projekt INAZfragt nach den Qualifikationen, Kompetenzen und Bedarfen des pädagogischen Personals in der Erwachsenenbildung. Die Autorinnen und der Autor skizzieren im Beitrag die zugrunde gelegten Annahmen über die Gelingensbedingungen Inklusiver Erwachsenenbildungsangebote.
Dissertation
Berücksichtigung von Studierendenvorstellungen zum Thema Gehirn und Lernen in der Lehrkräfteausbildung Biologie
(2019-11)
Lehrer*innenbildung hat das Ziel, Studierende zu Fachleuten für das Lehren und Lernen auszubilden. Zahlreiche empirische Studien zeigen jedoch sowohl bei angehenden als auch praktizierenden Lehrkräften eine hohe Verbreitung von Fehlvorstellungen zum Thema Gehirn und Lernen – sogenannte Neuromythen. Für Biologielehrkräfte ist das Thema Gehirn und Lernen auch als Unterrichtsinhalt relevant. Sie unterrichten Themen wie Bau und Funktion des Gehirns oder Langzeitpotenzierung. Demnach ist es besonders wichtig, dass sie ...
Buch
Informality and Labour Regulations in Ghana
(Rainer Hampp Verlag, 2019)
The book makes a major contribution to the controversy about the factors driving the persistence and expansion of the informal economy. Unlike most others studies which either take a structuralist or an actor’s choice approach to the topic, this study combines a careful assessment of the economic, social and political circumstances promoting informality with a meticulously carried out econometric analysis of the dominant characteristics of workers as well as enterprises in the informal economy
in comparison to those ...
Aufsatz
Distributed practice in mathematics: Recommendable especially for students on a medium performance level?
(2019-10-24)
In this study, the effect of distributed practice on the mathematical performance of 7th graders was investigated (N == 81). After a stochastics lesson, one group of students worked three sets of exercises massed on one day, while the other group of students worked the same exercises distributed over three days. Bayesian analyses of the performance two weeks after the last practice revealed no evidence for an effect of practice condition. However, in a test after six weeks, strong evidence for a positive effect of ...
Dissertation
1.55 μm Quantum Dot Lasers for Telecommunication
(2019)
The thesis at hand investigates the suitability of quantum dot (QD) material for use in long-distance coherent communication. The thesis was written in the frame of the SASER project MONOLOP that is aiming for a compact, monolithically integrated light source with a tunable wavelength covering the C+-band and narrow spectral linewidth below 500 kHz.
The thesis reviews the theoretical background of quantum dot material based on the InP material system and distributed feedback (DFB) lasers with lateral gratings as ...
Aufsatz
Signal based non-intrusive load decomposition
(2019-05-29)
Driven by both regulatory and monetary interests the development of energy monitoring systems has been accelerated in recent years. Thus, a large amount of data is collected and stored in huge databases. This is a decisive step towards sustainable production systems since you can’t improve what you don’t know. This paper aims to use the datasets currently available and to combine databases to gather additional information on production systems, in particular energy flows. Therefore, an algorithm has been developed ...
Dissertation
Wahrnehmungen und Deutungen von Jugendstrafgefangenen und Fachkräften zum Jugendstrafvollzug
(2019-08)
Die Jugendstrafe stellt die ultima ratio jugendstrafrechtlicher Sanktionen dar und soll nur dann zur Anwendung kommen, wenn die im Jugendgerichtsgesetz vorgesehenen Erziehungsmaßregeln oder Zuchtmittel nicht mehr geeignet erscheinen, die Wiederholung von Straftaten zu verhindern. Sie wird ausdrücklich mit erzieherischen Intentionen verhängt und soll damit die Adressaten dazu »… befähigen, künftig in sozialer Verantwortung ein Leben ohne Straftaten zu führen« (vgl. § 2 SächsJStVollzG). Am 31.05.2006 entschied das ...