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Dissertation
Development of digital fluorescence light sheet microscopy for high-resolution optical imaging
(2021-12-15)
In modern biology investigating the morphological development of an organism is an inevitable task. Optical microscopy has been extensively used to monitor the live tissue changes in a model organism and it is typically used in conjunction with white light or fluorescence microscopy. The fluorescence microscopy occupies a significant place in biological research due to its ability to address various biological question at subcellular level of a biological sample. One of the more recent developments in fluorescence ...
Masterarbeit
Simulative Research on a Modified VSM Control Scheme for Respecting DC-Side Active-Power Limitations
(2022)
This thesis presents and examines a novel approach to modify the active-power behaviour of a generic virtual synchronous machine (VSM) in order to respect DC-side active-power limitations of converter-coupled generation and loads, thereby enabling them to participate in instantaneous reserve without hardware reinforcements.
A modification to the VSM control is suggested, which consists of a ∆P feedback loop and a dynamic adaptation of the virtual impedance Xvirt. These mechanisms enable the VSM to have a RoCoF-dependent ...
Aufsatz
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Sustainability Assessment for Asparagus Farms that Work with a Community-Supported Agriculture Model in Turkey
(2022-07-31)
Due to the diversified nature of agricultural systems, it is difficult to handle the sustainability aspects of different farming practices. With an intention to evaluate the sustainability of the community-supported agriculture (CSA) model in Turkey, the current study focuses on asparagus farms and designs farm-specific sustainability indicators that would be helpful for the farmers. The framework developed for this purpose consists of 20 environmental, 8 economic, and 17 social sustainability indicators derived and ...
Aufsatz
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Icing the Cake: A Lifestyle-based Benefit and Preference Analysis on Online Grocery Shopping
(2022-07-31)
Germany has not kept pace with the global development of online grocery shopping (OGS) and despite a pandemic-related increase remains on a moderate level. This phenomenon may reflect infrastructural benefits of stationary retailing, personal and household preferences, and perceptions of OGS services. To this end, this study investigates the determinants of OGS benefit perception addressing the interconnection between personal and household benefits and situational conditions based on qualitative ...
Aufsatz
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Rural farmers’ learning of weed management methods in Malaysia
(2022-08-31)
Malim Nawar in Kampar District, Malaysia, is a potential major production site for modern high-technology farms by 2030. To achieve this, a significant increase in intensive agricultural activities and weed management practices is required. To develop strategies and achieve the goals of sustainable agriculture, the present study used a semi-structured questionnaire survey to assess farmers’ perception of weeds, their sources of information, and their reasons for willingness or unwillingness to adopt non-chemical ...
Dissertation
Entwicklung eines Nanospektrometer-Demonstrators für den sichtbaren Spektralbereich
(2022)
Ein miniaturisiertes optisches Spektrometer auf Basis eines Fabry-Pérot-Filter-Arrays wird für den sichtbaren Spektralbereich als Demonstrator realisiert. Hierfür wird ein FP-Filter-Array mit einem optischen Bandpass-Filter in eine Graustufen-CCD-Kamera integriert und ein Algorithmus zur Signalverarbeitung implementiert. Die Kalibrierung des Spektrometers wird experimentell mit Hilfe einer durchstimmbaren Lichtquelle durchgeführt, die in dieser Arbeit konstruiert und verifiziert wird. Die Bezeichnung des Spektrometers ...
Dissertation
Vergleichende phylogeographische und populationsgenetische Untersuchungen an der Pionierbaumgattung Macaranga (Euphorbiaceae) in Sundaland
(2022)
Die vorliegende Arbeit beschäftigt sich mit der Phylogeographie und Populationsgenetik der Pionierbaumgattung Macaranga in Sundaland, einer Region, die die Großen Sundainseln Sumatra, Borneo, Java und die malaiische Halbinsel umfasst. Eine Vielzahl der 300 in dieser Gattung enthaltenen Arten sind Wiederbesiedler gestörter Areale und sind daher in Sekundärwaldstrukturen besonders häufig. Im Rahmen dieser Dissertation wurden Studien in ganz Sundaland zu den sechs Arten M. tanarius (Tanarius-Artengruppe), M. gigantea, ...
Dissertation
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Automatic affective processes toward different types of exercise and physical activity in adults and children
(2022-03)
Taking a closer look at affective responses to exercise- and physical activity (PA)-related stimuli (regardless of whether they are automatic or deliberative in nature) still represents an area of research on exercise or PA motivation that involves many open questions. From this starting point, the central question is, why so many individuals feel uncomfortable while exercising and further, is this perhaps fundamental to why so many people fail to be sufficiently physically active although they know, that it would ...
Rezension
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[Rezension zu:] Katharina N. Piechocki, Cartographic Humanism. The Making of Early Modern Europe, Chicago (The University of Chicago Press) 2019, XII–311 p., 23 b/w fig., ISBN 978-0-226-64118-8, USD 45,00.
(2022-06-29)
Rezension von Ingrid Baumgärtner zu: Katharina N. Piechocki, Cartographic Humanism. The Making of Early Modern Europe, Chicago (The University of Chicago Press) 2019, XII–311 p., 23 b/w fig., ISBN 978-0-226-64118-8, USD 45,00.
Technischer Report
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Dokumentation der Erhebungsinstrumente des Projekts WiGeMath
(2022-05)
Der Anlass für das Projekt WiGeMath („Wirkungen und Gelingensbedingungen von mathematischen Unterstützungsmaßnahmen in der Studieneingangsphase“ FKZ: 01PB14015A & 01PB14015B) war, dass Wirksamkeit und Gelingensbedingungen von Unterstützungsmaßnahmen in der Studieneingangsphase, die Schwierigkeiten im Übergang von der Schule zur Hochschule lindern sollten, vorher kaum systematisch und zielgerichtet untersucht wurden: Evaluationserhebungen beschränkten sich überwiegend auf lokale und ad hoc gestaltete Zufriedenheitsabfragen ...