Patents Assigned to EPFL
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Patent number: 8788042Abstract: A preferred frequency is identified, being usable to stimulate a neurological target within a mammalian body using at least one microelectrode positioned at or near the target. To establish efficient and effective stimulation, an impedance analyzer is provided for measuring electrical impedance values indicative of a microelectrode-tissue interface across a range of different frequencies. A preferred one of the measured electrical impedance values is identified as being closest to a pure resistance. The neurological target can then be stimulated at or near the frequency associated with the preferred impedance value (peak resistance frequency), thereby promoting desirable traits, such as optimum charge transfer, minimum signal distortion, increased stimulation efficiency, and prevention of microelectrode corrosion. The peak resistance frequency can be used to determine an preferred pulse shape.Type: GrantFiled: July 29, 2009Date of Patent: July 22, 2014Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Andre Mercanzini, Philippe Renaud
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Publication number: 20140198198Abstract: The invention describes a method and a microscopy system for imaging and analysing stochastically and independently blinking point-like emitters. A multiple-order cumulants analysis in conjunction with an established blinking model enables the extraction of super-resolved environment-related parameter maps, such as molecular state lifetimes, concentration and brightness distributions of the emitter. In addition, such parameter maps can be used to compensate for the non-linear brightness and blinking response of higher-order cumulant images—used for example in Super-resolution Optical Fluctuation Imaging (SOFI)—to generate a balanced image contrast. Structures that otherwise would be masked by brighter regions in the conventional cumulant image become samples using spectral cross-cumulants.Type: ApplicationFiled: March 31, 2012Publication date: July 17, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Stefan Geissbuehler, Claudio Dellagiacoma, Matthias Geissbuehler, Theo Lasser, Marcel Leutenegger
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Publication number: 20140197459Abstract: Semiconductor device comprising a source electrode, a drain electrode and a semiconducting layer consisting of a single or double 2-dimensional layer(s) made from one of the following materials: MoS2, MoSe2, WS2, WSe2, MoTe2 or WTe2.Type: ApplicationFiled: January 4, 2012Publication date: July 17, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Andras Kis, Branimir Radisavljevic
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Patent number: 8781028Abstract: Integrated receiving circuit for radiofrequency signals an amplifying element using the multiplication zone of a reverse biased semiconductor junction operating in Geiger mode for amplifying an input radiofrequency signal (Vin) and converting it into a digital signal. And a digital part for digitally processing the digital signal.Type: GrantFiled: March 16, 2010Date of Patent: July 15, 2014Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Edoardo Charbon, Marek Gersbach, Maximilian Sergio
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Publication number: 20140195010Abstract: A mechanical teleoperated device for remote manipulation includes a slave unit having a number of slave links interconnected by a plurality of slave joints; an end-effector connected to the slave unit; a master unit having a corresponding number of master links interconnected by a plurality of master joints; and a handle connected to a distal end of the master unit. The device further includes first device arranged to kinematically connect the slave unit with the master unit, second device arranged to kinematically connect the end-effector with the handle, and a mechanical constraint device configured to ensure that one master link of the master unit is guided along its longitudinal axis so that the corresponding slave link of the slave unit always translates along a virtual axis parallel to the longitudinal axis of the guided master link in the vicinity of the remote manipulation when the mechanical teleoperated device is operated.Type: ApplicationFiled: July 25, 2012Publication date: July 10, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Ricardo Beira, Lionel Flaction
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Publication number: 20140177309Abstract: A method of storing one or more bits of information comprising: forming a magnetic bubble; and storing a said bit of information encoded in a typology of a domain wall of said magnetic bubble. Preferably a bit is encoded using a symmetric topological state of the domain wall and a topological state including at least one winding rotation of a magnetisation vector of the domain wall. Preferably the magnetic bubble is confined in an island of magnetic material, preferably of maximum dimension less than 1 ?m.Type: ApplicationFiled: February 26, 2014Publication date: June 26, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Christoforos MOUTAFIS, Stavros KOMINEAS
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Publication number: 20140180629Abstract: A method for determining the geometry and/or the localisation of an object comprising the steps of: sending one or more signals by using one transmitter; receiving by one or more receivers the transmitted signals and the echoes of the transmitted signals as reflected by one or more reflective surfaces building by a computing module a first Euclidean Distance Matrix (EDM) comprising the mutual positions of the receivers; adding to the EDM matrix a new row and a new column, the new row and a new column comprising time of arrivals of said echoes and computing its rank or distance to an EDM matrix determining the geometry and/or the position of the object based on said rank or distance.Type: ApplicationFiled: March 14, 2013Publication date: June 26, 2014Applicant: Ecole Polytechnique Federale de Lausanne EPFLInventors: Ivan DOKMANIC, Reza Parhizkar, Andreas Walther, Martin Vetterli, Yue Lu
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Publication number: 20140168426Abstract: A method and computing system are proposed for producing an authenticable security device with two sides. The verso side is covered with an adjustable luminescent emissive layer formed by invisible luminescent ink halftones and possibly a UV absorbing printed layer. The recto side is covered with transmissive non-luminescent ink halftones. The backlit colors resulting from the emissions of the luminescent layer or resulting from illumination by normal white light through the transmissive non-luminescent ink halftones are predicted by a backlighting model. This model enables computing the surface coverages of the luminescent and/or non-luminescent ink halftones in order to obtain a desired color either under excitation light (UV light) or under normal white light. This enable creating authenticable backlit images substantially similar to pre-stored reference images, either under normal white light, under excitation light, or under both the normal white light and the excitation light.Type: ApplicationFiled: December 17, 2012Publication date: June 19, 2014Applicant: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Julien Andres, Roger D. Hersch
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Patent number: 8749630Abstract: A method for automatic localization of objects in a mask. The method includes building a dictionary of atoms, wherein each atom models the presence of one object at one location and iteratively determining the atom of said dictionary which is best correlated with said mask, until ending criteria are met. The invention system concerns also automatically detects objects in a mask. At least one fixed camera is provided for acquiring video frames. A computation device is used for calibrating at least one fixed camera for extracting foreground silhouettes in each acquired video frames for discretizing said ground plane into a non-regular grid of potential location points for constructing a dictionary of atoms, and, for finding objects location points with the previous method. And a propagating device is provided to propagate the result in at least one fixed camera view.Type: GrantFiled: May 13, 2010Date of Patent: June 10, 2014Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Alexandre Alahi, Mohammad Golbabaee, Pierre Vandergheynst
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Publication number: 20140156929Abstract: A Network-On-Chip (NOC) organization comprises a die having a cache area and a core area, a plurality of core tiles arranged in the core area in a plurality of subsets, at least one cache memory bank arranged in the cache area, whereby the at least one cache memory bank is distinct from each of the plurality of core tiles. The NOC organization further comprises an interconnect fabric comprising a request tree to connect to a first cache memory bank of the at least one cache memory bank, each core tile of a first one of the subsets, the first subset corresponding to the first cache memory bank, such that each core tile of the first subset is connected to the first cache memory bank only, and allow guiding data packets from each core tile of the first subset to the first memory bank, and a reply tree to connect the first cache memory bank to each core tile of the first subset, and allow guiding data packets from the first cache memory bank to a core tile of the first subset.Type: ApplicationFiled: December 4, 2012Publication date: June 5, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Babak FALSAFI, Boris GROT, Pejman LOTFI KAMRAN
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Publication number: 20140148714Abstract: Method for automatic online delineation of an electrocardiogram (ECG) bio signal, said method comprising the detection of said bio signal through several leads followed by the combination of those multiple acquisitions into a single root-mean-squared (RMS) curve, said RMS curve being then undergoing a real-time single-lead delineation based on a mathematical processing.Type: ApplicationFiled: December 20, 2011Publication date: May 29, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Hossein Mamaghanian, Francisco Rincon Vallejos, Nadia Khaled, David Atienza Alonso, Pierre Vandergheynst
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Publication number: 20140147434Abstract: The present invention provides methods of increasing muscle mass and muscle mitochondrial oxidative metabolism. Additionally, the invention provides treating various disorders associated with mitochondrial dysfunction, including but not limited to metabolic disorders, muscular dystrophy disorders, neurodegenerative diseases, chronic inflammatory diseases, and diseases of aging.Type: ApplicationFiled: May 7, 2012Publication date: May 29, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Johan Auwerx, Hiroyasu Yamamoto, Laurent Mouchiroud
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Publication number: 20140146132Abstract: An omnidirectional sensor array system, for example a panoptic camera, comprising a plurality of sensors arranged on a support of predetermined shape to acquire data, wherein said sensors are directional and wherein each sensor is attached to a processing node which comprises integrated electronics that carries out at least a portion of the signal processing algorithms locally in order to reduce the computational load of a central hardware unit.Type: ApplicationFiled: October 31, 2011Publication date: May 29, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Luigi Bagnato, Laurent Jacques, Pierre Vandergheynst, Hossein Afshari, Alexandre Schmid, Yusuf Leblebici
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Publication number: 20140145894Abstract: The corrugated component for the transmission and manipulation of electromagnetic signals with frequency up to several THz, comprises an assembly of a plurality of plates stacked together in a hollow guiding rod wherein said plates have at least one aperture of alternating diameter to form a slot or a ridge in alternate fashion, wherein the external shape of said plates corresponds to the internal shape of the hollow guiding rod. The invention also concerns a method for assembling such a corrugated component.Type: ApplicationFiled: September 1, 2011Publication date: May 29, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventor: Alessandro Macor
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Patent number: 8729447Abstract: A microchannel plate (1) having an array of channels (5),includes a substrate (2) and, deposited on the substrate, a hydrogenated amorphous silicon film (3) having a thickness ranging between 50 ?m and 200 ?m, preferably between 80 ?m and 120 ?m, the film including the array of channels (5). Preferably, the substrate (2) is an integrated circuit having an internal electronic readout circuit and pixilated collection electrodes (8), and the film (3) is integrated on the substrate (2). The channels (5) may be formed by a Deep Reactive Ion Etching (DRIE) process.Type: GrantFiled: July 8, 2010Date of Patent: May 20, 2014Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Pierre Jarron, Nicolas Wyrsch
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Publication number: 20140136571Abstract: A growing amount of data is produced daily resulting in a growing demand for storage solutions. While cloud storage providers offer a virtually infinite storage capacity, data owners seek geographical and provider diversity in data placement, in order to avoid vendor lock-in and to increase availability and durability. Moreover, depending on the customer data access pattern, a certain cloud provider may be cheaper than another. In this respect is provided a method and a system that facilitates allocation of data objects in a distributed data storage environment. The system continuously adapts the placement of data based on its access patterns and subject to optimization objectives, such as storage costs. The system efficiently considers repositioning of only selected objects that may significantly lower the storage cost.Type: ApplicationFiled: November 12, 2012Publication date: May 15, 2014Applicant: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Nicolas Bonvin, Athanasios Papaioannou, Karl Aberer
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Publication number: 20140136513Abstract: A database system maintains a feature set of a modern database system while operating directly on raw data files. Systems may use an adaptive indexing mechanism that maintains positional information to provide efficient access to raw data files, a flexible caching structure, and techniques for selective parsing and selective tokenizing. In doing so, possible performance bottlenecks associated with repeated parsing, tokenizing, and expensive data type conversion costs can be overcome.Type: ApplicationFiled: November 15, 2012Publication date: May 15, 2014Applicant: Ecole Polytechnique Fédérale de Lausanne (EPFL)Inventors: Anastasia Ailamaki, Stratos Idreos, Ioannis Alagiannis, Renata Borovica, Miguel Sergio De Oliveira Branco
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Patent number: 8723365Abstract: A device for supplying power to a load, requiring both a pre-determined supply of electrical power and high power for short durations of the operating cycle of the load, where the operating cycle is repeated. The power supply device includes a connection to an electrical grid, an AC voltage transformation circuit, a voltage rectification means and a plurality of DC/DC converters mounted in series to terminals of the load. Each of the DC/DC converters has a storage capacitor mounted in parallel to it and at least one of the DC/DC converters is supplied directly by the voltage rectification means. At least another one of the DC/DC converters is not supplied directly by the voltage rectification means. The power supply device may compensate for losses in the power supply device and load, and may substantially continually and uniformly balance voltages at terminals of the storage capacitors.Type: GrantFiled: December 16, 2008Date of Patent: May 13, 2014Assignees: Ecole Polytechnique Federale de Lausanne (EPFL), European Organization for Nuclear ResearchInventors: Frederick Bordry, Jean-Paul Burnet, Claude Fahrni, Alfred Rufer
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Publication number: 20140129190Abstract: The present invention discloses a method, apparatus and computer program product for locating a source of diffusion in a network, the method comprising providing a model of at least a portion of the network, the network comprising a plurality of nodes, a plurality of edges, and at least one source of diffusion, providing a model of a diffusion process initiated by the at least one source during a time period of interest, and employing a source estimator to determine a location of a source of diffusion in at least a portion of the network based on a plurality of network model parameters characteristic for the at least a portion of the network, and a plurality of diffusion process model parameters characteristic for the provided model of a diffusion process.Type: ApplicationFiled: November 8, 2012Publication date: May 8, 2014Applicant: Ecole Polytechnique Federale de Lausanne EPFLInventors: Pedro Filipe PEREIRA CORREIA PINTO, Patrick Thiran, Martin Vetterli
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Publication number: 20140121676Abstract: The present invention relates to a method, such as a surgical method for assisting a surgeon for placing screws in the spine using a robot attached to a passive structure. The present invention also related to a method, such as a surgical method for assisting a surgeon for removing volumes in the body of a patient using a robot attached to a passive structure and to a device to carry out said methods. The present invention further concerns a device suitable to carry out the methods according to the present invention.Type: ApplicationFiled: April 2, 2012Publication date: May 1, 2014Applicant: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Szymon Kostrzewski, Philippe Berard, Charles Baur, John Michael Duff, Kishore Sandu