Patents Assigned to Ecole Polytechnique
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Patent number: 8080784Abstract: A plate for matrix-assisted laser desorption ionization (MALDI) mass spectrometry comprising an electrically conductive substrate (1) covered with a light sensitive matrix (2), the matrix (2) comprising a light absorber, a charge carrier, a probe molecule and a photo-sensitizer (3) arranged to oxidize the probe molecule when irradiated with light (4).Type: GrantFiled: January 10, 2008Date of Patent: December 20, 2011Assignee: Ecole Polytechnique Federale de LausanneInventors: Qiao Liang, Pengyuan Yang, Baohong Liu, Niels Lion, Christophe Roussel, Hubert Hugues Girault
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Patent number: 8080002Abstract: The implantable drug delivery device comprises at least an implantable pump, a reservoir and a delivery chamber.Type: GrantFiled: August 18, 2006Date of Patent: December 20, 2011Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Nikolaos Stergiopulos, Michel Bachmann
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Patent number: 8077893Abstract: The aim of the invention is to provide inter-channel level differences ICLD related to audio signals for hearing aids.Type: GrantFiled: May 30, 2008Date of Patent: December 13, 2011Assignee: Ecole Polytechnique Federale de LausanneInventors: Olivier Roy, Martin Vetterli
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Publication number: 20110302478Abstract: In bus communications methods and apparatus, a first set of physical signals representing the information to be conveyed over the bus is provided, and mapped to a codeword of a spherical code, wherein a codeword is representable as a vector of a plurality of components and the bus uses at least as many signal lines as components of the vector that are used, mapping the codeword to a second set of physical signals, wherein components of the second set of physical signals can have values from a set of component values having at least three distinct values for at least one component, and providing the second set of physical signals for transmission over the data bus in a physical form.Type: ApplicationFiled: December 30, 2010Publication date: December 8, 2011Applicant: Ecole Polytechnique F+e,acu e+ee d+e,acu e+ee rale De Lausanne (EPFL)Inventors: Harm Cronie, Amin Shokrollahi
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Publication number: 20110299555Abstract: Using a transformation based, at least in part, on a non-simple orthogonal matrix, data may be transmitted over a data bus in a manner that is resilient to one or more types of signal noise, that does not require a common reference at the transmission and acquisition points, and/or that has a pin-efficiency that is greater than 50% and may approach that of single-ended signaling. Such transformations may be implemented in hardware in an efficient manner. The transformation may be combined with methods from forward error correction to lower the required transmission power.Type: ApplicationFiled: June 6, 2011Publication date: December 8, 2011Applicant: Ecole Polytechnique Federale de LausanneInventors: Harm Cronie, Amin Shokrollahi
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Publication number: 20110299152Abstract: An embodiment relates to a device for generating a short duration laser pulse, which comprises: means for generating a laser beam and for filtering same, arranged in such a way as to generate an input laser beam providing an input laser pulse; a transparent slide comprising a non-linear scattering material; the laser generation means being arranged so that the slide widens the spectrum of the input laser pulse by phase self-modulation in order to generate a wide-spectrum laser pulse; compression means adapted for compressing the wide-spectrum laser pulse in order to generate a short duration laser pulse; wherein the laser generation means are arranged so that the input beam is spatially uniform on the transparent slide and has a break integral B lower than three when the input beam passes through the transparent slide.Type: ApplicationFiled: July 31, 2009Publication date: December 8, 2011Applicant: ECOLE POLYTECHNIQUEInventors: Gérard Mourou, Gilles Cheriaux, Christophe Radier
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Publication number: 20110296562Abstract: A method for acquiring signals in laser scanning microscopy, includes the steps of: moving a focused optical excitation beam relative to an object to be measured so that the focus point of the beam follows a predetermined path in the space of the object; and acquiring optical measurement signals along the path according to at least one acquisition parameter; characterised in that the path of the excitation beam is determined so as to substantially minimise the variations of the optical properties of at least one portion of the environments crossed by the excitation beam between consecutive acquisitions, and in that at least one acquisition parameter among the acquisition parameters is modulated during the movement of the excitation beam. A device for implementing the method is also described.Type: ApplicationFiled: February 3, 2010Publication date: December 1, 2011Applicant: ECOLE POLYTECHNIQUEInventors: Emmanuel Jean-Marc Beaurepaire, Israël Veilleux, Nicolas Olivier, Delphine Malvina Danièle Marie Debarre, Jean-Louis Martin
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Patent number: 8067953Abstract: A semiconductor device for measuring ultra low currents down to the level of single electrons or low voltages comprises a first and a second voltage supply terminal, an input terminal for receiving an electrical current or being supplied with a voltage to be measured, a bipolar transistor having a base, an emitter and a collector, wherein a first PN junction is formed between the base and the collector and a second PN junction is formed between the base and the emitter, wherein the emitter is coupled to the input terminal and the base is coupled to the second voltage supply terminal, and wherein the first PN junction is designed for reverse biased operation as an avalanche diode, and a quenching and recharging circuit having a first terminal coupled to the first voltage supply terminal and a second terminal coupled to the collector of the bipolar transistors, the quenching and recharging circuit permitting operation of the first PN junction reverse biased above the breakdown voltage of the first PN junction.Type: GrantFiled: December 17, 2007Date of Patent: November 29, 2011Assignee: Ecole Polytechnique Federale De LausanneInventors: Marc Lany, Radivoje Popovic
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Patent number: 8064632Abstract: An interference filter having a plurality of layers and a spectrum as a function of angle of observation is combined with a metameric element adjacent the interference filter and appearing to have a same color as the interference filter at at least one angle of observation and a contrasting color as said interference filter at least one other angle of observation. A plurality of interference filter layers, including a metallic layer, can be provided on a support structure for the layers. The support structure is then adapted to allow the layers to be seen from a top and a bottom side, with the layers being adapted to have different spectra as a function of angle of observation in reflection and transmission.Type: GrantFiled: April 23, 2007Date of Patent: November 22, 2011Assignee: Corporation de l'Ecole Polytechnique de MontfInventors: Bill Baloukas, Ludvik Martinu
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Patent number: 8059272Abstract: Light dispersing device comprising a slit element having a slit for exposure to electromagnetic radiation, wherein the slit element is configured and disposed for turning the slit between at least two positions. The light dispersing device is used together with a streak camera, whereby in a first position the slit is adjusted to influence the temporal resolution of the streak camera and in a second postion the slit is adjusted to influence the spectral resolution of the streak camera.Type: GrantFiled: September 16, 2005Date of Patent: November 15, 2011Assignee: École Polytechnique Fédérale de LausanneInventor: Jean-Daniel Ganiere
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Publication number: 20110265876Abstract: The present invention relates to novel pyridine compounds that can be used as anchoring ligands in metal-based sensitizing dyes of dye sensitized solar cells (DSCS). The dyes comprising the polypyridine compounds exhibit improved light harvesting ability and lead to increased conversion efficiencies, in particular in thin TiO2 film devices.Type: ApplicationFiled: November 11, 2009Publication date: November 3, 2011Applicants: UNIVERSITÄT ULM, ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Shaik Mohammad Zakeeruddin, Cédric Klein, Mohammad Khaja Nazeeruddin, Michael Graetzel, Amaresh Mishra, Markus Fischer, Peter Bäuerle
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Publication number: 20110268225Abstract: Using a transformation based at least in part on a non-simple orthogonal or unitary matrix, data may be transmitted over a data bus in a manner that is resilient to one or more types of signal noise, that does not require a common reference at the transmission and acquisition points, and/or that has a pin-efficiency that is greater than 50% and may approach that of single-ended signaling. Such transformations may be implemented in hardware in an efficient manner. Hybrid transformers that apply such transformations to selected subsets of signals to be transmitted may be used to adapt to various signal set sizes and/or transmission environment properties including noise and physical space requirements of given transmission environments.Type: ApplicationFiled: May 20, 2010Publication date: November 3, 2011Applicant: Ecole Polytechnique Federale De Lausanne (EPFL)Inventors: Harm Cronie, Amin Shokrollahi
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Publication number: 20110261602Abstract: 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: May 26, 2009Publication date: October 27, 2011Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Christoforos Moutafis, Stravros Komineas
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Publication number: 20110254448Abstract: A method and a system for increasing the lifespan of a plasma obtained in the atmosphere. The method includes the following steps: emitting a femtosecond laser pulse, referred to as a first pulse, generating a column of plasma by the filamentation phenomenon, and emitting a second YAG laser pulse, focused by way of an axicon on a line in the plasma column, the energy of the photons of the second laser pulse being greater than the attachment energy of the electrons in the plasma to neutral molecules such as oxygen molecules. The duration of the second pulse is greater than the duration of the first pulse, and the delay between the two pulses is greater than one microsecond.Type: ApplicationFiled: November 6, 2009Publication date: October 20, 2011Applicants: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE NATIONALE SUPERIEURE DES TECHNIQUES AVANCEESInventors: Andre Mysyrowicz, Michel Franco
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Patent number: 8039819Abstract: A device and a method for creating a spatial dose distribution in a medium volume (22) are described. A laser system produces laser pulses (12) with a pulse length shorter than 200 fs (femtoseconds) and is capable to be focused to peak intensities greater than 10^18 W/cm^2 (watts per centimeter squared). An electron source (18) is capable of releasing a high-energy electron pulse (20), in particular the electrons having an energy greater than 100 MeV, upon irradiation with said laser pulses (12) propagating into the medium volume (22). The light paths (52, 56,58) of at least some of the laser pulses (12) are adjustable in such a way that high-energy electron pulses (20) are emitted from the irradiated at least one electron source on different trajectories (20,28,60,62) through the medium volume (22) thereby depositing their dose in the medium volume (22) according to a provided pattern.Type: GrantFiled: July 20, 2006Date of Patent: October 18, 2011Assignees: Ecole Polytechnique, Deutsches KrebsforschungszentrumInventors: Jérôme Faure, Yannick Glinec, Victor Malka, Thomas Fuchs, Hanitra Szymanowski, Uwe Oelfke
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Patent number: 8042087Abstract: A method to design a Networks on Chips (NoCs)-based communication system for connecting on-chip components in a multicore system, said system comprising several elements communicating through the communication system, said communication system comprising at least switches, said method comprising the steps of modelling the applications running on the multicore system, establishing the number and configuration of switches to connect the elements, establishing physical connectivity between the elements and the switches, for each two pairs of communicating elements: (a) a defining a communication path, (b) calculating metrics as affected by the need to render said path into physical connectivity, taking into account any previously defined physical connectivity, (c) iterating the steps a and b for a plurality of possible paths, (d) choosing the path having the optimal metrics, and (e) establishing any missing physical connectivity between the switches so that the selected optimal path occurs across physically connType: GrantFiled: October 10, 2007Date of Patent: October 18, 2011Assignee: Ecole Polytechnique Federale De Lausanne (EPFL)Inventors: Srinivasan Murali, Luca Benini, Giovanni De Micheli
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Publication number: 20110249157Abstract: The present invention aims to capture two images simultaneously in the visible part of the spectrum and a NIR image. This is achieved through a camera for simultaneously capturing a visible and near-infrared image by at least a sensor producing sensor response data and having at least one colour filter array (CFA) comprising at least four different filters, said colour filter array having visible and near-infrared light filters, and said camera comprising means to obtain a visible image while using the sensor response data from the visible part of the spectrum and a NIR image using the sensor response data from the near-infrared part of the spectrum.Type: ApplicationFiled: September 8, 2009Publication date: October 13, 2011Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)Inventors: Clément Fredembach, Yue Lu, Sabine Süsstrunk
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Patent number: 8034027Abstract: An infusion pump comprising a substance and pushing fluid inlet, a substance outlet, a central chamber communicating with said inlet and said outlet, and injecting means for injecting a substance into a biological object, wherein the infusion pump further includes a pushing fluid outlet in communication with the central chamber in such a way as to allow a pushing fluid to exhaust the pump. The outlet of the infusion pump is advantageously connected to the proximal end of a catheter, the distal end being inserted into the biological object. A sensor, e.g., an optical device, is preferably placed at the outlet of the infusion pump and checks that the outlet is free of gas. The infusion pump is preferably remotely controlled so that it can be placed in limited access locations. It is also preferably computer controlled.Type: GrantFiled: May 12, 2008Date of Patent: October 11, 2011Assignee: Ecole Polytechnique Federale De Lausanne (EPPL)Inventors: Arnaud Comment, Jacques Van Der Klink
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Publication number: 20110240090Abstract: A photovoltaic module includes at least two photovoltaic cells in series, each rectangular cell including, respectively, a first rear thin film electrode, a photovoltaic stack having at least two active materials included between the rear electrode and a transparent conductive electrode made of a thin film, the electrode TC being capable of collecting and transmitting an electric current generated by the photovoltaic stack, the two photovoltaic cells being electrically connected in series by an electrical contact strip that is included between the electrode TC of the first cell and the rear electrode of the second cell. The local thickness of the electrode TC of the cell varies as a function of the distance to the electrical contact strip. Also described are methods for depositing and etching the transparent conductive film so as to simultaneously manufacture a plurality of cells for a single module.Type: ApplicationFiled: December 3, 2009Publication date: October 6, 2011Applicants: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, TOTAL SAInventors: Erik V. Johnson, Pere Roca I Cabarrocas
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Publication number: 20110232261Abstract: A plasma thruster includes extraction of a stream of positive ions. The plasma thruster includes a single ionization stage; means for injecting ionizable gas for said ionization stage, said means comprising at least first means for injecting a first gas and second means for injecting an electronegative second gas; means for creating an RF electric field so as to cause the gases to ionize in the ionization stage, said means creating a first zone called the hot zone, in the ionization stage; the first gas being distributed in the hot first zone, the second gas being distributed in a second zone less hot than said first zone; first means for extracting a stream of negative ions and second means for extracting a stream of positive ions, these being both connected to the ionization stage; and the extraction of a stream of positive ions and the extraction of a stream of negative ions, ensuring that the thruster is electrically neutral.Type: ApplicationFiled: November 24, 2009Publication date: September 29, 2011Applicants: ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Pascal Chabert, Ane Aanesland, Albert Meige, Gary Leray