This thesis discusses the differences and similarities between the absorption heat transformer process (also known as heat pump process type II) and the absorption heat pump process. The focus is the conditioning process of the mass flows of the refrigerant and the solution entering the main heat exchanger (absorber, generator, evaporator and conde...
Recently, the theoretical relevance and utility of the regionalised notion of post-socialist cities have been questioned. The ensuing debate has resulted in several positions, including suggestions to drop the term entirely or to create a distinctive narrative based on the concept of a Global East, in order to position the knowledge as equal vis-a-...
To limit global warming and reduce greenhouse gas emissions, all sectors of society need to take action, including efforts to research, develop, and deploy new technologies such as carbon capture and utilization (‘CCU’). This requires systematic evaluation and comparison of promising technologies (including identifying their bottlenecks), as such u...
Die Datei enthält die ausgewerteten Messdaten von der Vermessung der Funktionsmuster 1 und 2, welche im Forschungsvorhaben "AHA - Abwärmegetriebener Haushaltskühlschrank zur energieeffizienten Kältebereitstellung mit umweltverträglichen Arbeitsmedien" (FKZ 03ET1412A) entwickelt wurden. Die Daten gehören zum "Schlussbericht - Abwärmegetriebener Haus...
This is the dataset collected in the research project Simra (Safety in Bicycle Traffic, https://www.digital-future.berlin/en/research/projects/simra/) from January 2021 to September 2021 in the Berlin region. The dataset includes recorded bicycle rides (including GPS trace, accelerometer trace, and annotated near miss incidents) as well as user pro...
Overall water splitting, as a sustainable pathway to obtain clean energy, can be achieved via electrocatalytic and photocatalytic reactions. However, neither of them has yet been widely applied in the industry. Thus, the achievement of electro- and photocatalysts for overall water splitting is still in high demand. Carbon nitride has been commonly ...
Im Gegensatz zu klassischen Lasern, bei denen viele Emitter mit der Resonatormode wechselwirken, tragen bei Mikrolasern zum Teil nur wenige Quantenemitter zur Emission bei. Bei Mikrolasern mit geringem Modenvolumen ist die elektromagnetische Wechselwirkung zwischen den Quantenemitter und der Resonatormode sehr hoch und kann sich sogar im Regime der...
The generation of renewable and sustainable electricity can be achieved through fuel cells by the reaction hydrogen (H2) with oxygen (O2). In order to meet the current energy demand with fuel cells, a large feedstock of H2 is necessary. Alkaline water electrolysis is the only mature energy conversion technology for the renewable production of H2 th...
Passively mode-locked lasers produce regular optical pulse trains at high repetition rates and find many applications in science and technology. This thesis numerically investigates two specific devices: a monolithically integrated three-section tapered semiconductor quantum-dot laser and a V-shaped external cavity semiconductor laser. Both lasers ...
This work presents new tailor-made carbazole-based porous organic polymers CPOPs, which were synthesized via oxidative polymerization, targeting their applications for heterogeneous catalysis and hydrogen storage. Introducing chelating ligands into the polymer network, so called ‘porous macroligands’, gives the opportunity to immobilize metal compl...
