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Dissertation
The anatomy of velvet worms (Onychophora) as revealed by a multimethodological approach and three-dimensional reconstructions
(2024)
Onychophorans, or velvet worms, comprise a small group of worm-like, multi-legged terrestrial invertebrates. Since their discovery in 1826, these organisms have been investigated from different perspectives, particularly in the field of morphology—a discipline that provides the basis for functional and evolutionary inferences. Onychophorans are currently classified within Ecdysozoa (moulting animals) and form together with Tardigrada (water bears) and Arthropoda a clade named Panarthropoda. Therefore, onychophorans ...
Dissertation
Pentamethylcyclopentadienyl-Halbsandwich-Eisenkomplexe mit ungewöhnlichen Carbenliganden
(2024)
This dissertation project deals with the electronic properties of the pentamethylcyclopentadienyl halfsandwich iron complex with bis(trimethylsilyl)amido ligand ([Fe(Cp*)(HMDS)], HMDS = N(SiMe₃)₂) and its reactivity towards carbenes or their direct precursor compounds. The compound was published in 1998 by the Siemeling group and described at the time as diamagnetic. Structurally very similar representatives with penta-isopropylcyclopentadienyl- (⁵Cp) and 1,2,4-tri-tert-butylcyclopentadienyl ligands (Cp‘) have been ...
Dissertation
Die Synthese planar-chiraler 1,1´–Diaminoferrocenderivate
(2024)
Dieses Forschungsprojekt beschäftigt sich mit 1,1´-Diaminoferrocenderivaten, die aufgrund ei-nes weiteren Substituenten X in Nachbarstellung (ortho-Position) zu einer der Stickstoffgrup-pen planare Chiralität aufweisen. Obgleich 1,1´-Diaminoferrocen eine bewährte Schlüsselver-bindung innerhalb der Ferrocenchemie ist, insbesondere zur Darstellung von N,N-Chelatligan-den und N-heterozyklischen Tetrylenen, jeweils mit 1,1´-Ferrocenylenrückgrat, war der syn-thetische Zugang zu den hier behandelten planar-chiralen ...
Dissertation
City Development Regimes in-the-Making. Phronetic Analysis of Governance, Networks and Power in Cairo, 2011-2022
(2024)
Since the revolutionary uprising of January 2011, Cairo’s inner-city neighbourhoods have undergone rapid spatial transformations. Over the last decade, numerous old housing buildings have been replaced by modern ones, leading to the displacement of residents to the desert cities or newly-constructed neighbourhoods outside the city centre. The most remarkable transformations occurred since early 2018. Notably, these changes have been characterised by a fast implementation rate and a lack of community resistance to ...
Dissertation
Existence and Asymptotic Behavior of Solutions to the Time-Periodic Navier-Stokes Equations in a Layer Domain with Nonhomogeneous Boundary Data
(2024)
This dissertation is dedicated to the analysis of the Navier-Stokes equations in a timeperiodic framework in the so-called layer domain Π = R2 × (0, 1), described by:
∂tu − νΔu + (u · ∇)u + ∇p = f in [0, T] × Π,
div u = 0 in [0, T] × Π,
u|∂Π = a for all t ∈ [0, T] ,
u|t=0 = u|t=T in Π.
The velocity field u and the pressure p are unknowns, while the external force f is prescribed. Challenges arise due to unboundedness of the layer Π and from introduction of a nonhomogeneous boundary condition a. The investigated ...
Dissertation
Promises and Pitfalls of Machine Learning Modeling in Psychological Research
(2024)
Algorithmen des maschinellen Lernens werden in der Psychologie und ihren Teildisziplinen immer beliebter. Sie werden häufig dafür angepriesen, dass sie mit der Multikollinearität von Prädiktorvariablen und komplexen Beziehungen zwischen Prädiktoren und Kriterien effizient umgehen können. Trotz ihrer Vorteile werden auch immer mehr kritische Stimmen laut, die auf die derzeitigen Grenzen von Vorhersagen durch maschinelles Lernen hinweisen und die Frage aufwerfen, ob die Algorithmen den Erwartungen gerecht werden. ...
Dissertation
Begriff und Psychodynamik des Scheiterns aus psychoanalytischer Sicht am Beispiel des „König Lear Opern Projekts“ von Giuseppe Verdi
(2024)
Die vorliegende Untersuchung fokussiert sich auf die Frage, weshalb sich Giuseppe Verdi als überaus erfolgreicher Komponist von 26 Opern 50 Jahre damit beschäftigte, den „König Lear“ von William Shakespeare zu vertonen, ohne das Projekt jemals auf die Bühne zu bringen. Verdis wiederholtes Aufgreifen und Wiederfallenlassen des Projekts verweisen auf ein hohes Maß an Ambivalenz, sodass sich darüber eine psychoanalytische Fragestellung legitimiert. Die psychoanalytische Untersuchung zielt auf den Zusammenhang zwischen ...
Dissertation
Plant growth, water quality, carbon and nutrient flows in rural-urban cropping systems of Bengaluru, India
(2024)
The global urban population is expected to reach 5.2 billion by 2030 and by mid-2023 approximately 4.6 billion out of more than 8 billion population were living in towns or cities. This represents approximately 57% of the total global population and is set to reach 60% by 2030. India’s urban population is expected to reach 607 million by 2030 and by mid-2030 40% of the total population will be living in urban areas. Growing urban population has multi-sectoral and dimensional implications in the rural, peri-urban, and ...
Dissertation
Testing the Impact of Large-scale Digital Support on Students' Paths Toward College Education
(2024-02)
Increasing the share of college graduates can boost productivity, promote social mobility, and improve well-being. However, these benefits are often realized when the education system satisfies the demands of the industry. Otherwise, society may face skill shortages. This thesis aims to expand the understanding of how to attract students, particularly minorities, to pursue academic majors linked to the areas facing skill shortages (henceforth, high-rewarding majors). To accomplish this, it examines the impact of ...