Patents Assigned to Ecole Polytechnique
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Patent number: 8953875Abstract: A digital filter bank having a number J?1 of stages is disclosed. For each integer j such that 1?j?J, the j-th stage includes a plurality of filtering units (20, 21) each receiving an input signal of the j-th stage. These filtering units include a low-pass filtering unit (20) using real filtering coefficients and at least one band-pass filtering unit (21) using complex filtering coefficients. Following each band-pass filtering unit of the j-th stage, a respective modulus processing unit (25) generates a processed real signal as a function of squared moduli of complex output values of the band-pass filtering unit. The input signal of the first stage is a digital signal supplied to the digital filter bank, while for 1<j?J, the input signal of the j-th stage includes the processed real signal generated by at least one modulus processing unit of the (j?1)-th stage.Type: GrantFiled: May 26, 2011Date of Patent: February 10, 2015Assignee: Ecole PolytechniqueInventor: Stephane Mallat
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Patent number: 8941512Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for encoding and decoding information. In one aspect, methods of encoding information in an encoder include receiving a signal representing information using a collection of discrete digits, converting, by an encoder, the received signal into a time-based code, and outputting the time-based code. The time-based code is divided into time intervals. Each of the time intervals of the time-based code corresponds to a digit in the received signal. Each digit of a first state of the received signal is expressed as an event occurring at a first time within the corresponding time interval of the time-based code. Each digit of a second state of the received signal is expressed as an event occurring at a second time within the corresponding time intervals of the time-based code, the first time is distinguishable from the second time.Type: GrantFiled: July 23, 2012Date of Patent: January 27, 2015Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventor: Henry Markram
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Patent number: 8943354Abstract: A method and device for predicting faults in a distributed heterogeneous IT system (100), the method comprising: creating a local checkpoint (19) in an explorer node (10) of said system (100), said local checkpoint (19) reflecting the state of said explorer node (10); running a path exploration engine (14) on said local checkpoint (19) in order to predict faults, wherein a plurality of possible inputs (71) are used by said exploration engine (14) in order to explore different paths, wherein path exploration comprises sending messages to remote client nodes (20), and receiving messages from said remote clients (20); wherein said received messages do not reveal checkpoints of said other nodes, so as to avoid leakage of any confidential information.Type: GrantFiled: November 7, 2012Date of Patent: January 27, 2015Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Marco Canini, Olivier Crameri, Kumar Gautam, Vojin Jovanovic, Dejan Kostic, Dejan Novakovic
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Patent number: 8937722Abstract: A method for imaging a microscopic object with improved resolution including the steps of measuring a complex wavefield scattered by the microscopic object with an instrument or microscope, the complex wavefield being represented by phase and amplitude or by real and imaginary parts; and computing an image of the microscopic object with a resolution better than given by the Abbe diffraction limit, including deconvolving the complex wavefield scattered by the microscopic object with a complex coherent transfer function (CTF) applied to the complex wavefield.Type: GrantFiled: March 28, 2011Date of Patent: January 20, 2015Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Yann Cotte, Nicolas Pavillon, Christian Depeursinge
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Patent number: 8938103Abstract: A method and system for the rapid detection of biomolecular interactions, the system comprising a sensing platform which comprises a primary support structure including recesses designed to be located in front of a detection unit, said recesses containing one or several arrays of biosensors, said system furthermore comprising a reader unit for optical excitation and detection.Type: GrantFiled: February 25, 2011Date of Patent: January 20, 2015Assignee: Ecole Polytechnique Ferderale de Lausanne (EPFL)Inventors: Nicolas Durand, Iwan Märki, Theo Lasser
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Patent number: 8933756Abstract: A generator of very short pulses where a cascade of inverters of arbitrary length characterized in that said inverters are adapted to produce pulses on their power supply line instead of their usual output.Type: GrantFiled: June 13, 2012Date of Patent: January 13, 2015Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Edmund James Colli-Vignarelli, Catherine Dehollain, Jean-Yves Le Boudec
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Publication number: 20150000730Abstract: A method for the low-temperature production of radial electronic junction semiconductor nanostructures on a substrate, includes: a) forming on the substrate, metal aggregates capable of electronically doping a first semiconductor material; b) growing, in the vapor phase, doped semiconductor nanowires in the presence of one or more non-dopant precursor gases of the first semiconductor material, the substrate being heated to a temperature at which the metal aggregates are in the liquid phase, the growth of the doped semiconductor nanowires in the vapor phase being catalyzed by the metal aggregates; c) rendering the residual metal aggregates inactive; and d) the chemical vapor deposition, in the presence of one or more precursor gases and a dopant gas, of at least one thin film of a second semiconductor material so as to form at least one radial electronic junction nanostructure between the nanowire and the at least one doped thin film.Type: ApplicationFiled: January 3, 2013Publication date: January 1, 2015Applicants: TOTAL MARKETING SERVICES, ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Linwei Yu, Pere Roca I Cabarrocas
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Publication number: 20140376085Abstract: A passive device for the coherent combination of at least two optical amplifiers, includes an interferometer having at least four branches having optical elements for separating and combining polarization, the elements having four inlet-outlet ports that are respectively connected to a branch. The first branch includes a first polarization element, a first optical amplifier and a first mirror; the second branch includes a second polarization element, a second optical amplifier and a second mirror; the third branch includes a third polarization element and a third mirror; the fourth branch is an inlet-outlet branch of the interferometer. The three polarization elements are designed such that a polarized optical beam entering respectively into the first, second or third branch and reflected by the mirror at the end thereof forms a polarized optical beam leaving the branch with a polarization that is orthogonal to that of the polarized optical beam entering the branch.Type: ApplicationFiled: July 10, 2012Publication date: December 25, 2014Applicant: Ecole PolytechniqueInventors: Dimitris Papadopoulos, Marc Hanna, Louis Daniault
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Publication number: 20140379090Abstract: The invention relates to a replacement metallic prosthesis to be implanted which contains means monitor its condition during use in order to allow an early detection of failure or insufficient functionality, wherein said means comprise implanted sensors and electronics (3) and a remote device (9), to measure the implant's function and degradation during its life span, wherein said sensors are electro chemical sensors with electrodes (1). The prosthesis according to the invention may also be used to promote bone growth. The invention also relates to a method using the device of the invention.Type: ApplicationFiled: August 8, 2012Publication date: December 25, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Nikitas Diomidis, Stefano Mischler, Eric Meurville
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Publication number: 20140347672Abstract: The disclosed invention describes a new apparatus performing a new data acquisition for quantitative refractive index tomography. It is based on a linear scanning of the specimen, opposed to the classical approaches based on rotations of either the sample or the illumination beam, which are based on the illumination with plane waves, which orientation is successively modified in order to acquire angular information. On the contrary, the inventive apparatus and method rely on a specially shaped illumination, which provides straightforwardly an angular distribution in the illumination of the specimen. The specimen can thus be linearly scanned in the object plane in order to acquire the data set enabling tomographic reconstruction, where the different positions directly possess the information on various angles for the incoming wave vectors.Type: ApplicationFiled: July 30, 2012Publication date: November 27, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Nicolas Pavillon, Christian Depeursinge
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Patent number: 8895922Abstract: A method suitable for preparing a specimen for inspection, the method comprising the steps of: irradiating a photocathode so that the photocathode emits electrons from a surface of the photocathode, wherein the emitted electrons each follow a trajectory, and the trajectories of the electrons are such that they can be extrapolated to intersect at a region within the photocathode, the region defining a virtual source, and wherein the photocathode comprises a rounded tip which has a radius of curvature; configuring the emitted electrons so that they form an electron beam; focusing the electron beam onto a specimen to form an image of the virtual source on the specimen. There is further provided a corresponding electron beam apparatus.Type: GrantFiled: March 15, 2012Date of Patent: November 25, 2014Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventor: Jean Berney
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Publication number: 20140329867Abstract: The present invention relates to use of inhibitors of Notch signalling pathway selected from the group consisting of 6-(4-Tert-Butylphenoxy)Pyridin-3-Amine (I3), its derivatives, in treating and/or preventing cancers.Type: ApplicationFiled: December 21, 2012Publication date: November 6, 2014Applicant: Ecole Polytechnique Federale de LausanneInventors: Freddy Radtke, Rajwinder Lehal, Viktoria Reinmuller, Jieping Zhu
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Patent number: 8879319Abstract: A multi-level cell flash memory storage device has cells wherein different charge levels represent different information. The storage device can read stored charge from one or more cells, store a rewrite generation value for a group of a plurality of cells in a block of cells, and write to cells, wherein writing to one or more cells without an erase includes an increment of the rewrite generation value, and includes circuitry for reading from cells, including circuitry for reading the rewrite generation value. The storage device can include circuitry for reading from cells includes within the multi-level cell flash memory storage device logic for calculating a stored value of the cells using the rewrite generation value and relative levels of charge on a plurality of cells. The storage device can track hot addresses and cold addresses and perform static or dynamic wear leveling based on accumulated rewrite generation values.Type: GrantFiled: July 30, 2012Date of Patent: November 4, 2014Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Yuval Cassuto, Luoming Zhang, M. Amin Shokrollahi
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Patent number: 8872240Abstract: The present invention exploits the combination of the amplification, provided by the integration of a FET (or any other three terminal active device), with the signal modulation, provided by the MEM resonator, to build a MEM resonator with built-in transistor (hereafter called active MEM resonator). In these devices, a mechanical displacement is converted into a current modulation and depending on the active MEM resonator geometry, number of gates and bias conditions it is possible to selectively amplify an applied signal. This invention integrates proposes to integrate transistor and micro-electro-mechanical resonator operation in a device with a single body and multiple surrounding gates for improved performance, control and functionality. Moreover, under certain conditions, an active resonator can serve as DC-AC converter and provide at the output an AC signal corresponding to its mechanical resonance frequency.Type: GrantFiled: November 18, 2009Date of Patent: October 28, 2014Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Mihai Adrian Ionescu, Daniel Grogg
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Publication number: 20140312385Abstract: The present invention relates to a device including a ferroic material having a ferroelectric order parameter and including at least two domains, as well as a first and second electrode in electrical contact with the ferroic material. The device is configured to form a head-to-head polarization orientation or a tail-to-tail polarization orientation at an interface between the two domains to form a charged domain wall at said interface and between the first and second electrodes. The present invention relates to a corresponding method for operating such a device.Type: ApplicationFiled: April 18, 2014Publication date: October 23, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Tomas SLUKA, Alexander TAGANTSEV
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Patent number: 8863096Abstract: A symbolic execution task is dynamically divided among multiple computing nodes. Each of the multiple computing nodes explores a different portion of a same symbolic execution tree independently of other computing nodes. Workload status updates are received from the multiple computing nodes. A workload status update includes a length of a job queue of a computing node. A list of the multiple computing nodes ordered based on the computing nodes' job queue lengths is generated. A determination is made regarding whether a first computing node in the list is underloaded. A determination is made regarding whether a last computing node in the list is overloaded. Responsive to the first computing node being underloaded and the last computing node being overloaded, a job transfer request is generated that instructs the last computing node to transfer a set of one or more jobs to the first computing node.Type: GrantFiled: January 6, 2012Date of Patent: October 14, 2014Assignee: École Polytechnique Fédérale de Lausanne (EPFL)Inventors: Stefan Bucur, Cristian Zamfir, George Candea
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Patent number: 8859929Abstract: An apparatus is described for depositing a film on a substrate from a plasma. The apparatus comprises an enclosure, a plurality of plasma generator elements disposed within the enclosure, and means, also within the enclosure, for supporting the substrate. Each plasma generator element comprises a microwave antenna having an end from which microwaves are emitted, a magnet disposed in the region of the said antenna end and defining therewith an electron cyclotron resonance region in which a plasma can be generated, and a gas entry element having an outlet for a film precursor gas or a plasma gas. The outlet is arranged to direct gas towards a film deposition area situated beyond the magnet, as considered from the microwave antenna, the outlet being located in, or above, the hot electron confinement envelope.Type: GrantFiled: October 26, 2007Date of Patent: October 14, 2014Assignees: Dow Corning Corporation, Ecole PolytechniqueInventors: Pere Roca I Cabarrocas, Pavel Bulkin, Dmitri Daineka, Patrick Leempoel, Pierre Descamps, Thibault Kervyn De Meerendre
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Publication number: 20140300370Abstract: A time reversal process for determining a fault location in an electrical power network comprising multi-conductor lines, comprises measuring at an observation point located anywhere along one of the multi-conductor lines, for each of the conductors of the multi-conductor line, respectively a fault-originated electromagnetic transient signal; defining a set of guessed fault locations each having a different determined location in the electrical power network, and each of the guessed fault locations is attributed a same arbitrary fault impedance; defining a network model for the electrical power network, based on its topology and multi-conductor lines electrical parameters capable of reproducing in the network model the electromagnetic traveling waves; and computing for each conductor a time inversion of the measured fault-originated electromagnetic transients signal.Type: ApplicationFiled: April 8, 2013Publication date: October 9, 2014Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Mario PAOLONE, Farhad RACHIDI-HAERI, Hossein MAHMOUDIMANESH, Reza RAZZAGHI, Gaspard LUGRIN
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Patent number: 8852640Abstract: Embodiments include a vehicle for delivery of nitric oxide comprising: a collection of micelles having an internal micelle core that comprises a polymer with N-diazeniumdiolate comprising NO complexed with secondary amines of the polymer. Embodiments include a method of making a nitric oxide vehicle comprising dissolving a polymer that comprises secondary amines in an aqueous solution and combining the polymer with nitric oxide in the solution to form a N-diazeniumdiolate comprising the nitric oxide complexed with the secondary amines, with the formation of the N-diazeniumdiolate causing the polymer to be at least partially insoluble in the solution and to form a collection of micelles that have an internal core that comprises N-diazeniumdiolate.Type: GrantFiled: July 3, 2008Date of Patent: October 7, 2014Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Jeffrey A. Hubbell, Yun Suk Jo, André van der Vlies
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Patent number: 8852344Abstract: The invention relates to an effusing source for film deposition made of a reservoir comprising one hole characterized by the fact that the hole diameter is less than one order of magnitude than the mean free path of the molecules determined by the pressure and its thickness is at least one order of magnitude smaller than the diameter. Preferably the source has several holes.Type: GrantFiled: October 24, 2011Date of Patent: October 7, 2014Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Giacomo Benvenuti, Estelle Halary-Wagner, Simone Amorosi, Patrik Hoffmann