We present a new model of asset prices in which a representative agent has extrapolative beliefs about stock market returns and Epstein-Zin preferences. The model quantitatively explains facts about asset prices, return expectations, and cash-flow expectations. When the agent’s beliefs about stock market returns are calibrated to survey expectation...
status: accepted
We propose a superconducting spin valve based on a Josephson junction with B20-familymagnetic metal as a barrier material. Our analysis shows that the states of this element can be switched by reorienting the intrinsic non-collinear magnetization of the spiral magnet. This reorientation modifies long-range spin-triplet correlations and thereby stro...
Carbon-based membranes were manufactured by deposition of a polymeric precursor on asymmetric porous, ceramic substrates with tube channel geometry followed by pyrolysis. As a precursor, an unsaturated polyester resin prepared was used. The deposition of the carbon membranes results first on short substrate geometries (105 mm long single-channel tu...
Die aktuelle Rechtsprechung des Bundesgerichtshofs orientiert sich bei unfallbedingten Anmietungen von Fahrzeugen am realen Marktpreis. Es besteht daher ein erheblicher Bedarf an einer aktuellen und neutralen Marktübersicht zu marktüblichen Mietwagenpreisen in Deutschland. Aus diesem Grund erstellt das Fraunhofer IAO seit 2008 einen repräsentativen...
With the widespread deployment of face recognition systems, face presentation attack detection (PAD) plays an essential role in mitigating their vulnerabilities. Face PAD is employed before the identification system to detect if the presented face is an attack. However, most of the existing face PAD methods tend to overfit on the training data and ...
Applications as robotic harvesting or pick and place in the agrifood domain require robotic grippers able to gently manipulate delicate products, while guaranteeing high gripping power and adhesion forces on smooth surfaces. Existing soft grippers are mainly based on pneumatic bending actuators which can guarantee a gentle manipulation, but they su...
Bohrverfahren, die mittels Hochdruck-Wasserstrahlen Gestein abtragen, werden als Jetting-Verfahren bezeichnet und in der Bohrindustrie seit vielen Jahren eingesetzt. Dennoch ist die Anwendung dieser Bohrverfahren in der Geothermie mit Einschränkungen verbunden. So stellen beispielsweise die Länge der abgeteuften Bohrung (Lateral), der Durchmesser d...
Many Android apps handle and store sensible data on the smartphone, such as for example passwords, API keys or messages. This information must of course be protected and thus more and more protected storage options and storage isolation techniques were implemented in recent Android version. This results in good security and privacy mechanisms provi...
We investigate whether objective features, like occurrence of an error and number of turns, can automatically predict success in interactions with multimodal speech assistants. We used interactions from the SmartKom corpus, a data set on multimodal interactions with virtual assistants in German. In a first step, we segmented the interactions into r...
