Abstract: A micro-electro-mechanical system includes a deflectable actuator plate and an abutment area. An integral piezoelectric functional layer of the deflectable actuator plate is configured across an area APS of the actuator plate. The deflectable actuator plate is configured to effect a hollow warp in at least a controlled or non-controlled state, wherein the abutment area is disposed facing a hollow side of the deflectable actuator plate defined by the hollow warp. The deflectable actuator plate is configured to provide, in the state in which the same effects the hollow warp, mechanical contact between the deflectable actuator plate and the abutment area. In the other state, the deflectable actuator plate is disposed spaced apart from the abutment area.
Type:
Grant
Filed:
August 12, 2016
Date of Patent:
August 6, 2019
Assignee:
Fraunhofe-Gesellschaft zur Foerderung der angewandten Forschung e.V.
Abstract: A file system is configured to provide, based on a request from a requester, a requested file stored on a storage medium to the requester. Furthermore, the file system is configured to provide a chosen part of the requested file corresponding to a desired version of the content of the requested file to the requester, based on received side information in the request indicating the desired version, and based on meta information of the requested file.
Type:
Grant
Filed:
April 7, 2015
Date of Patent:
December 11, 2018
Assignee:
FRAUNHOFE-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Inventors:
Heiko Sparenberg, Siegfried Floessel, Matthias Martin, Michael Schoeberl
Abstract: A terahertz system can be configured for producing and coherently detecting terahertz radiation. The system can comprise a laser light source and two THz antennas, a first of which is used as a transmission antenna and a second of which is used as a receiver antenna, which are each optically coupled to the laser light source by an optical fibre and can be activated by light from this laser light source, wherein the THz antennas each have a semiconductor chip to which antenna conductors have been contact-connected and which comprises at least one photosensitive active layer with a band edge wavelength which is longer than a wavelength of the laser light source and at least one layer, adjoining the active layer, with a band edge wavelength which is shorter than the wavelength of the laser light source, wherein the band edge wavelength of the active layer of at least one of the THz antennas is at least 200 nm longer than the wavelength of the laser light source.
Type:
Application
Filed:
October 25, 2011
Publication date:
November 21, 2013
Applicant:
Fraunhofe-Gesellschaft zur Förderung der angewandten Forschung E.V.
Inventors:
Bernd Sartorius, Helmut Roehle, Dennis Stanze, Roman Dietz