Abstract: There are disclosed techniques (e.g., apparatus, methods) for estimating an impulse response of a linear system. An apparatus is configured to generate a transmit signal on the basis of a first sequence. The apparatus is configured to obtain a receive signal and to multiply the receive signal with a second sequence, to obtain a modified receive signal, wherein the second sequence is different from the first sequence. The apparatus is configured to analog-to-digital, ADC, convert an integration result in order to obtain a sample value, the integration result being based on an integration of the modified receive signal over a period of time. The apparatus is configured to obtain an estimate of the impulse response on the basis of a plurality of sample values.

Abstract: An apparatus for analyzing an element rotating at a rotational speed based on an vibration signal originating from the rotating element has: an analysis function processor for forming a plurality of analysis functions, the analysis function processor configured to form each analysis function based on an analysis frequency, on the vibration signal or on a measured or estimated rotational speed and on a predetermined order factor differing for each analysis function; a correlator configured to calculate a correlation result from the vibration signal and each analysis function, each correlation result being associated to the order factor which the analysis function, with which the correlation result was calculated, is based on, and the correlation results representing a correlation function; and an examiner configured for examining the correlation function or examining information derived from the correlation function so as to make a statement on a state of the rotating element.

Abstract: A cell includes a transparent covering element arranged at a top side of the cell, an interior arranged below the covering element, the interior being partly filled with an electrolyte, and a semiconductor absorber arranged in or at the electrolyte. Furthermore, the cell includes one or more counterelectrodes arranged above the semiconductor absorber in the electrolyte and electrically connected to a back electrode arranged at a rear side of the semiconductor absorber facing away from the covering element, and one or more membrane enclosures, wherein a counterelectrode in each case extends within a membrane enclosure. One or more channel spaces are formed between an electrolyte surface and an underside of the covering element, the one or more channel spaces extending along one or more partial regions of the underside of the covering element and being usable for guiding away a first gas formed in the interior of the cell.

Abstract: A method for the spatial tomography of sound includes the following steps: contactlessly capturing a physical parameter for a first and a second multitude of local regions in space along a first and a second laser beam as well as calculating a voxel model of the sound pressure over time per local region of the first and second multitudes based on the captured physical parameter.

Abstract: The present invention relates firstly to a method for reproducing a stem cell niche of an organism. The invention further relates to a reproduction of a stem cell niche of an organism. According to the invention, an image of a tissue of an organism is generated, which tissue comprises at least one stem cell niche. The image is filtered in order to obtain a structural pattern of the imaged stem cell niche. In a further step, a lithographic mask is generated from the structural pattern. According to the invention, a starting material of a substrate is structured by means of indirect or direct application of the lithographic mask, whereby a structured substrate is obtained which represents the reproduction of the imaged stem cell niche of the organism. The reproduction can be characterised as biolithomorphic.

Abstract: An apparatus for generating a plurality of parametric audio streams from an input spatial audio signal obtained from a recording in a recording space has a segmentor and a generator. The segmentor is configured for providing at least two input segmental audio signals from the input spatial audio signal, wherein the at least two input segmental audio signals are associated with corresponding segments of the recording space. The generator is configured for generating a parametric audio stream for each of the at least two input segmental audio signals to obtain the plurality of parametric audio streams.

Abstract: A device for determining room-optimized transfer functions for a listening room serving for room-optimized post-processing of audio signals in spatial production, is configured to analyze room acoustics of the listening room and to determine, based on the analysis of the room acoustics, the room-optimized transfer functions for the listening room where the spatial reproduction by means of a binaural close-range sound transducer is to take place. The spatial reproduction of the audio signals by means of the binaural close-range sound transducer may then be emulated using known head-related transfer functions und using the room-optimized transfer functions, wherein a room to be synthesized may be emulated based on the head-related transfer functions, and wherein the listening room may be emulated based on the room-optimized transfer functions.

Abstract: Apparatus for adapting a spatial audio signal for an original loudspeaker setup to a playback loudspeaker setup that differs from the original loudspeaker setup. The apparatus includes a direct-ambience decomposer that is configured to decomposing channel signals in a segment of the original loudspeaker setup into direct sound and ambience components, and to determine a direction of arrival of the direct sound components. A direct sound renderer receives a playback loudspeaker setup information and adjusts the direct sound components using the playback loudspeaker setup information so that a perceived direction of arrival of the direct sound components in the playback loudspeaker setup is substantially identical to the direction of arrival of the direct sound components. A combiner combines adjusted direct sound components and possibly modified ambience components to obtain loudspeaker signals for loudspeakers of the playback loudspeaker setup.

Abstract: Embodiments of the present invention provide a memristor having a first electrode, a second electrode and a memristive layer arranged between the first electrode and the second electrode. Thereby, the memristor is adapted to obtain an asymmetrical current density distribution in the memristive layer.

Abstract: An apparatus for generating spectral replacement values for an audio signal has a buffer unit for storing previous spectral values relating to a previously received error-free audio frame. Moreover, the apparatus includes a concealment frame generator for generating the spectral replacement values, when a current audio frame has not been received or is erroneous. The previously received error-free audio frame has filter information, the filter information having associated a filter stability value indicating a stability of a prediction filter. The concealment frame generator is adapted to generate the spectral replacement values based on the previous spectral values and based on the filter stability value.

Abstract: The present invention relates to a method for producing a structure modeled on a biological tissue. The invention also relates to a structure which can be produced using the method according to the invention. According to an embodiment of the invention, a precursor of a biopolymer is locally irradiated with electromagnetic radiation in a targeted manner, wherein the irradiation, in particular the selection of the areas to be irradiated, is effected according to data which describe a structural construction at least components of the extracellular matrix of the biological tissue. In this case, the electromagnetic radiation is such that two-photon or multi-photon absorption takes place in the irradiated areas of the precursor and results in the precursor being polymerized to form the biopolymer in the irradiated areas, with the result being that the precursor is at least partially solidified there.

Abstract: A method is provided for producing a microstructured molded object that is intended for culturing of biological cells. According to this method, a plastically deformable first porous film is prepared, as well as a deformable second film and a deformable sacrificial film. The first, second and sacrificial film are placed in a stack. Next, the sacrificial film is subjected to pressure to press the stack into a mold. The mold has recesses, such that deformed regions in the form of cavities are produced in the sacrificial film, the first film and the second film, and undeformed regions remain. During the pressing of the film stack into the mold, the first film and the second film are joined to each other, so that they form a composite film. At least portions of the deformed regions of the second film are etched so that sections of the second film are chemically dissolved.

Abstract: Methods and apparatuses for removing a visual object from a visual data stream. A live visual data stream containing present and subsequent images is received. A visual object is selected by defining a contour. A binary mask based on said contour is determined. Starting at the coarsest layer, regions outside the mask for replacing a region within the mask are selected. The region within the mask is replaced by content of the selected regions. The selecting and the replacing are successively repeated at each of the finer layers of the resolution pyramid finishing at the finest layer. The repeated replacing is also based on the content replaced at the next coarser layer. The step of determining a binary mask, calculating a resolution pyramid, and repeated selecting and repeated replacing are repeated for the received subsequent image. The repeated replacing is also based on the content replaced in the preceding image.

Abstract: A leaky-wave antenna includes a sheet arrangement having first, second and third metalized sheets that are arranged on top of and in parallel with one another and are separated by two di-electric layers, the first metalized sheet having a first two-dimensionally periodic metalization structure, the second metalized sheet having a second two-dimensionally periodic metalization structure, and the third metalized sheet having a continuous metalization area, and an excitation structure above the first metalized sheet for exciting a leaky-wave mode in the sheet arrangement at a working frequency f0 of the leaky-wave antenna, wherein the sheet arrangement exhibits a shape of a regular n-gon with N?8 (N ? Z) or a circular shape as the edge boundary.

Abstract: The present invention relates to a method for producing a structure modeled on a biological tissue. The invention also relates to a structure which can be produced using the method according to the invention. According to an embodiment of the invention, a precursor of a biopolymer is locally irradiated with electromagnetic radiation in a targeted manner, wherein the irradiation, in particular the selection of the areas to be irradiated, is effected according to data which describe a structural construction at least components of the extracellular matrix of the biological tissue. In this case, the electromagnetic radiation is such that two-photon or multi-photon absorption takes place in the irradiated areas of the precursor and results in the precursor being polymerized to form the biopolymer in the irradiated areas, with the result being that the precursor is at least partially solidified there.

Abstract: Methods and apparatuses for removing a visual object from a visual data stream. A live visual data stream containing present and subsequent images is received. A visual object is selected by defining a contour. A binary mask based on said contour is determined. Starting at the coarsest layer, regions outside the mask for replacing a region within the mask are selected. The region within the mask is replaced by content of the selected regions. The selecting and the replacing are successively repeated at each of the finer layers of the resolution pyramid finishing at the finest layer. The repeated replacing is also based on the content replaced at the next coarser layer. The step of determining a binary mask, calculating a resolution pyramid, and repeated selecting and repeated replacing are repeated for the received subsequent image. The repeated replacing is also based on the content replaced in the preceding image.

Abstract: The invention relates to a device and a method for the micromechanical positioning and handling of an object. The aim of the invention is to provide a device and an associated method for the micromechanical positioning and handling of objects by means of which the scanning speed can be increased and the positional accuracy be improved so that real time images or video rate images (ca. 25 images per second) having a lateral and vertical resolution in the nanometer range can be achieved. According to the invention, a monolithic component, preferably made of silicon, comprises a support element, an object carrier, a plurality of guide elements and elements for transmitting the movement, the preferably piezoresistive drive elements and the preferably piezoresistive position detectors being integrated into said monolithic component; Said micromechanical positioning device can be used, for example, in scanning probe microscopy and in nanopositioning and nanomanipulation technology.

Abstract: An embodiment of a device for generating a note signal upon a manual input includes an operator to enable a user of the same as an input to define one or several points as an input signal, and a controller which is implemented to receive the input signal and to generate a note signal based on the input signal and an allocation function. The allocation function allocates one single or no tone to each point of a two-dimensional definition amount with a tone quality axis and a frequency axis. The definition amount has a plurality of base points. Here, exactly one tone is allocated to each of the base points.

Abstract: By means of an RIE etch process for silicon (3), a pin-type structure (4,4a) without crystal defects is formed with high aspect ratio and with nano dimensions on the surface of silicon wafers without any additional patterning measures (e-beam, interference lithography, and the like) by selecting the gas components of the etch plasma in self-organization wherein, among others, a broadband antireflective behavior is obtained that may be applicable in many fields.

Abstract: A leaky-wave antenna includes a sheet arrangement having first, second and third metalized sheets that are arranged on top of and in parallel with one another and are separated by two di-electric layers, the first metalized sheet having a first two-dimensionally periodic metalization structure, the second metalized sheet having a second two-dimensionally periodic metalization structure, and the third metalized sheet having a continuous metalization area, and an excitation structure above the first metalized sheet for exciting a leaky-wave mode in the sheet arrangement at a working frequency f0 of the leaky-wave antenna, wherein the sheet arrangement exhibits a shape of a regular n-gon with N?8 (N ? Z) or a circular shape as the edge boundary.