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Dissertation
Entlasten statt Entlassen. Auswirkungen des digitalen Wandels auf die handwerkliche Arbeitswelt am Beispiel ausgewählter Gewerke.
(2023)
'Entlasten statt Entlasten', eine qualitative Studie zur Erforschung der Auswirkungen des digitalen Wandels auf die handwerkliche Arbeitswelt am Beispiel ausgewählter Gewerke.
Dissertation
A Multi-Perspective Investigation of the Innovation Process: Dynamics, Regulation, and Integration of Concepts
(2021)
This dissertation provides insight into how individuals and teams address the complex and dynamic nature of innovation processes. Focusing on affect and self-regulation, the dissertation investigates how and why regulation efforts of individuals and teams may be beneficial for both innovative activities (i.e., idea generation and implementation) and innovative strategies (i.e., exploration and exploitation). Further, it addresses the issue of conceptual variety in innovation research and examines to what extent ...
Working paper
Does Political Resource Curse Really Exist? Evidence from the Rentier States in the Greater Middle East
(2023)
This Extractivism Policy Brief shows:
• Oil rents may affect the political regimes through influencing both defense and non-defense expenditures.
• Defense expenditures are considerably influenced by oil rents fluctuations and the quality of political system.
• The rent-seeking by incumbent autocrats may take the form of misappropriation of government revenues away from public services towards patronage.
• Being a ‘political curse’, natural resources could be detrimental to democracy and enhance regime ...
Aufsatz
Excellent superelasticity in a Co-Ni-Ga high-temperature shape memory alloy processed by directed energy deposition
(2020-04-30)
A Co-Ni-Ga high-temperature shape memory alloy has been additively manufactured by directed energy deposition. Due to the highly anisotropic microstructure, i.e. columnar grains featuring a strong near-⟨001⟩ texture in build direction, the as-built material is characterized by a very low degree of constraints and, thus, shows excellent superelasticity without conducting a post-process heat treatment. As characterized by in situ deformation testing and post-mortem microstructural analysis, additive manufacturing ...
Dissertation
Fabrication and Investigation of Diamond Membranes for Photonic Nanostructures
(2023)
Due to its exceptional physical and chemical characteristics, diamond in a form of thin membranes is a particularly promising material for the fabrication of high-quality photonic devices. Especially for envisioned applications in quantum information technologies and communication, diamond gained, as a host material, an ever-increasing scientific interest based on remarkable properties of different color centers in its crystal lattice, e.g. nitrogen-vacancy centers, serving as single-photon emitters. As a high index ...
Working paper
Handlungsleitfaden zur Klimaneutralität im Bereich Mobilität für die Stadt Kassel
(2023)
Der Handlungsleitfaden zeigt Wege zur Klimaneutralität der Stadt Kassel im Bereich Mobilität auf. Es werden konkrete Maßnahmen vorgeschlagen und anhand ihres Wirkungspotenzials zur Treibhausgasminderung, des Zeitraums zu ihrer Umsetzung sowie ihrer Bedeutung für die Akzeptanz und für das Zusammenwirken in Kombination mit anderen Maßnahmen bewertet und priorisiert.
Working paper
Environmental Tax Reform in Latin America
(2023)
• Latin American countries need to implement an agenda of green tax reforms to adapt their current development path and better respond to climate change. The decarbonization of the energy matrix is essential to mitigate future challenges.
• These governments have the potential to raise environmentally oriented taxes to generate additional revenues. Objective should be to adapt to the energy transition, attenuate extractivism and promote better income distribution and growth.
• The design and implementation of green ...
Buch
Suizidprävention Deutschland
(Deutsche Akademie für Suizidprävention e.V. (DASP), 2021-08)
In jedem Jahr sterben in Deutschland mehr als 9.000 Menschen durch Suizid. Durch jeden Suizid sind mittelbar mehr als 100.000 weitere Menschen betroffen. Vor diesem Hintergrund hat das Bundesministerium für Gesundheit Mittel für ein Projekt zur Verfügung gestellt, um eine Grundlage für die weitere Entwicklung der Suizidprävention zu gewinnen. Das Projektziel war die Erstellung eines wissenschaftlich fundierten umfassenden Berichts zur Suizidproblematik, der Suizidprävention und deren Perspektiven in Deutschland. Der ...
Aufsatz
Novel Class of Rhenium Borides Based on Hexagonal Boron Networks Interconnected by Short B₂ Dumbbells
(2022-09-06)
Transition metal borides are known due to their attractive mechanical, electronic, refractive, and other properties. A new class of rhenium borides was identified by synchrotron single-crystal X-ray diffraction experiments in laser-heated diamond anvil cells between 26 and 75 GPa. Recoverable to ambient conditions, compounds rhenium triboride (ReB₃) and rhenium tetraboride (ReB₄) consist of close-packed single layers of rhenium atoms alternating with boron networks built from puckered hexagonal layers, which link ...
Aufsatz
A new method for microscale cyclic crack growth characterization from notched microcantilevers and application to single crystalline tungsten and a metallic glass
(2022-06-22)
The lifetime of most metals is limited by cyclic loads, ending in fatigue failure. The progressive growth of cracks ends up in catastrophic failure. An advanced method is presented for the determination of cyclic crack growth on the microscale using a nanoindenter, which allows the characterization of > 10,000 loading cycles. It uses focused ion beam fabricated notched microcantilevers. The method has been validated by cyclic bending metallic glass and tungsten microcantilevers. The experiments reveal a stable crack ...