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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 ...
Video
PAISAJE Y TERRITORIO EN EL PERÚ
(2022-04-02)
Partiendo de la formación de una sensibilidad para con los paisajes culturales, se identifican y analizan los principales paisajes culturales y el desarrollo territorial en el Perú.
Siguen travesías teóricas dedicadas a la arquitectura y el paisaje: ¿qué hace allí la arquitectura? ¿Qué nos quieren decir las representaciones líticas del valle del Sondondo? ¿Qué es lo transcendental de la arquitectura del paisaje inca?
José Canziani Amico
Arquitecto y urbanista por la Universidad de Florencia, Italia
Doctor por ...
Aufsatz
Comparison of linear discriminant analysis, support vector machine and artificial neural network in classifying Nigerian local turkeys based on plumage colours using biometric traits
(2022-10-18)
The ability of linear discriminant analysis (LDA), support vector machine (SVM), and artificial neural network (ANN) models to differentiate biometric traits of Nigerian local turkeys was investigated in this study. The biometric traits (bodyweight, body length, breast girth, thigh length, shank length, keel length, wing length, and wingspan) in 200 (20-week-old) turkeys were measured. Seventy percent of the datasets were used to train the three models, with the remaining 30% being used to test their performance. All ...
Aufsatz
Use of corncob biochar and urea for pakchoi (Brassica rapa L.) cultivation: Short-term impact of pyrolysis temperature and fertiliser dose on plant growth and yield
(2022-10-18)
This study aimed to evaluate the effect of pyrolysis temperature of corncob biochar as a soil amendment and urea fertiliser on the growth and yield of pakchoi. Pakchoi was cultivated in pots
(13 cm height, 19 cm upper diameter, and 13.5 cm bottom diameter). Two factors including pyrolysis temperature of biochar and urea dose were combined with four levels each. Pyrolysis temperature factor consisted of B0 (no biochar), B1 (250 °C), B2 (300 °C), and B3 (350 °C). Urea dose consisted of F0 (no urea), F1 (0.6 g pot-¹), ...