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Dissertation
Optimal Control of Quantum Information Tasks in Open Quantum Systems
(2020-07-30)
Every quantum system inevitably interacts with its environment. This is a fundamental requirement that allows us to control, measure and, in general, interact with quantum systems. In that respect, a quantum system's openness can be interpreted as prerequisite that enables quantum technologies in the first place. The latter are built to harness the intrinsic quantum mechanical behavior of quantum devices in order to build new, powerful technologies. However, a quantum system's openness also causes it to interact ...
Aufsatz
Does backyard-keeping of native sows by smallholders in Quezon, Philippines, offer sustainability benefits compared to more intensive management of exotic sow breeds?
(2020-04-03)
The present study in Quezon, Philippines, assessed the sustainability of small-scale production systems, based either on native or on exotic sow breeds, using different survey tools in a socio-economic approach. In two research periods, data sets with 49 households and 68 households, respectively, all smallholder farmers keeping ≤5 sows, were compiled. In 2016, four municipalities were purposively selected, each representing one of Quezon’s four districts. In 2017, two municipalities, both with larger populations of ...
Aufsatz
Parameter identification of crack-like notches in aluminum plates based on strain gauge data
(2020-12-31)
The identification of crack parameters and stress intensity factors in aluminum plates under tensile loading is in the focus of the presented research. In this regard, data of strain gauges, distributed along the edges of the samples, are interpreted. In the experiments, slit-shaped notches take the role of cracks located in the interior of the specimens. Their positions, inclinations and lengths as well as the magnitudes of external loadings are identified solving the inverse problems of cracked plates and associated ...
Teil eines Buches
Die letzte Äbtissin aus dem Hause Hornstein
(Nünnerich-Asmus Verlag & Media GmbH, 2020)
Working paper
Die Austro Moderne
(2023-01-10)
Die Länder Zentraleuropas lassen sich nicht einfach als Nachholer der westlichen Modernisierung begreifen. Der Beitrag zeigt vielmehr auf, wie die technischen Entwicklungen in den Autofabriken Lohner in Wien und Austro-Daimler in Wiener Neustadt vor sich gingen und der leichte und leistungsstarke Benzinmotor den Flugzeugbau (die Taube von Etrich) und Luftschiffbau vorantrieb. Im Flugzeugbau war Österreich um 1910 führend. Das kreative Milieu in Wien wird daran deutlich, dass die Hauptverwaltung der Lohnerwerke bloß ...
Konferenzveröffentlichung
Minerva-Gentner Symposium: Burchard of Mount Sion’s Descriptio Terrae Sanctae
(2023-03-09)
The Minerva-Gentner Symposium on Burchard of Mount Sion’s Descriptio Terrae Sanctae, organized by Ingrid Baumgärtner and Jonathan Rubin, was held at Bar-Ilan University in Ramat Gan, Israel, from 28 November to 1 December 2022. In the workshop, German, Israeli, Italian and British scholars discussed the challenges – on the level of content, textual philology and technology – of publishing this work in print and digital form. The focus of the discussion was on questions relating to the new edition of the Descriptio , ...
Working paper
Trucking in the Eastern Bloc
(2023-03-10)
This article explores the tensions during the Cold War between the need to have infrastructure to enable truck transport in the countries of the Eastern Bloc. Using “shortage economy” as the theoretical framework to analyse the Eastern bloc the article shows restrictions the shortage economy imposed on investments in infrastructure. The Western management started in the 1980s to let the enterprises’ transports to be carried out by external truck transport service providers – a policy which is known as “outsourcing”. ...
Aufsatz
Quenching of High Entropy Alloys after Annealing
(2020)
The effect of cooling rate after annealing at 900 °C on the microstructure and hardness of high entropy alloys was investigated using two typical samples with the chemical composition of Co₁₆Cr₁₄.₅Fe₂₉Mn₁₁.₅Ni₂₉ and Co₁₁.₅Cr₇Fe₂₇Mn₂₇Ni₂₇(Nb₀.₀₈C₀.₅) (at%). The microstructural characterisation and hardness measurements were carried out by optical microscopy, scanning electron microscopy, wavelength-dispersive X-ray spectroscopy, electron back scattered diffraction, X-ray diffraction technique and Vickers hardness ...
Aufsatz
Are farmer perceptions among significant determinants of adoption of agricultural diversity in Malawi? A case of Lilongwe district
(2020-12-14)
Agricultural diversity can strengthen resilience of livelihood of farmers to climate change and market uncertainties while, potentially at the same time, o ering better dietary and nutritional prospects for households. Adoption of agricultural diversity in Malawi is low. Policy-makers, researchers, non-governmental organisations (NGOs), and extension staff need to understand dynamics of adoption of agricultural diversity in order to develop appropriate policies and interventions to promote agricultural diversification. ...
Dissertation
High temperature-stable InGaAs QDs for the monolithic integration in external-cavity surface-emitting lasers
(2021)
Optically pumped vertical external-cavity surface-emitting lasers (VECSELs), also called semiconductor disk lasers (SDLs), benefit from the flexibility and versatility of the semiconductor material. With a simple cavity layout, fundamental transverse mode operation with a circular output beam and high beam quality is possible. They have excellent heat-sink properties and only require inexpensive multimode diode lasers for pumping. The complete VECSEL structure is only a few micrometers thick which leads to a strong ...