Patents Assigned to Ecole Polytechnique
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Patent number: 6611955Abstract: A method for on-line monitoring and testing the behavior of middleware based, distributed application software during run-time of such software is disclosed. In order to automatize the monitoring of the behavior of the application software, the monitoring method comprises: defining events capturing the behavior of the software execution, the events being based on an abstraction of the application software, the abstraction being provided by middleware; using code generating means and an instrumentation technique for automatically adding code to the implementation of the software code suitable for generating traces suitable to be sent to an observer, the information carried by the added code including information on the order of occurrence of the events and on the application software part location where each event occurs; and using a monitoring mechanism based on sending of trace reports to the observer, which ensures or takes into account the time order of the reported traces.Type: GrantFiled: June 3, 1999Date of Patent: August 26, 2003Assignees: Swisscom AG, Alcatel, Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Xavier Logean, Falk Dietrich, Jean-Pierre A. Hubaux, Sylvain Grisouard, Pierre-Alain Etique, Shawn E. Koppenhoefer
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Patent number: 6569544Abstract: The invention concerns a electroluminescent device with a multilayer structure comprising: i) a first electrode including a layer, consisting of a transparent or translucent conductive material selected among metal oxides and metal nitrides, said layer being deposited on a transparent support, consisting of a glass, silicon, alumina plate, or a polymer sheet; ii) a second electrode; iii) a layer, arranged between the two electrodes, comprising a semiconductor and electroluminescent solid organic substance, said layer being optionally bordered with one or several intermediate layers, consisting of electrocatalysts; and iv) a layer with monomolecular structure, arranged between the layer consisting of the conductive material and the layer consisting of the electroluminescent substance. Said device is furher characterised in that said layer consists of a dipolar organic compound whereof the structure has an electronic system &pgr;, a functional group, vicinal or not of the electronic system &pgr;.Type: GrantFiled: January 31, 2000Date of Patent: May 27, 2003Assignee: Ecole Polytechnique Federale de LausanneInventors: Nüesch Frank Alain, Rotzinger François, Si-Ahmed Lynda, Zuppiroli Libero
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Patent number: 6546029Abstract: A tunable Fabry-Perot vertical cavity photonic device and a method of its fabrication are presented. The device comprises top and bottom semiconductor DBR stacks and a tunable air-gap cavity therebetween. The air-gap cavity is formed within a recess in a spacer above the bottom DBR stack. The top DBR stack is carried by a supporting structure in a region thereof located above a central region of the recess, while a region of the supporting structure above the recess and outside the DBR stack presents a membrane deflectable by the application of a tuning voltage to the device contacts.Type: GrantFiled: March 15, 2001Date of Patent: April 8, 2003Assignee: Ecole Polytechnique Federale de LausanneInventors: Alexei Sirbu, Vladimir Iakovlev, Grigore Suruceanu, Alok Rudra, Elyahou Kapon
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Patent number: 6542531Abstract: An electrically pumped VCSEL and a method of its fabrication are presented. The VCSEL comprises an active cavity material sandwiched between top and bottom DBR stacks, the top DBR having at least one n-semiconductor layer. The device defines an aperture region between the structured surface of the active cavity material and the n-semiconductor layer of the top DBR stack. The structured surface is formed by a top surface of a mesa that includes at least the upper n++ layer of a p++/n++ tunnel junction and the surface of a p-type layer outside the mesa. The structured surface is fused to the surface of the n-semiconductor layer of the DBR stack due to the deformation of these surfaces, thereby creating an air gap in the vicinity of the mesa between the fused surfaces.Type: GrantFiled: March 15, 2001Date of Patent: April 1, 2003Assignee: Ecole Polytechnique Federale de LausanneInventors: Alexei Sirbu, Vladimir Iakovlev, Alok Rudra, Elyahou Kapon
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Patent number: 6509174Abstract: Fluorescent protein expressing cells with very high fluorescence are described as well as a method to obtain such cells. The fluorescence of such cells can be as high as about 1000 times the auto-fluorescence of the respective host cell. Due to the high fluorescence, said cells are very suitable tools in the development, surveillance and/or optimization of production processes, for selection of culture media and process parameters and for the determination of cell growth and the detection, quantification and monitoring of biomass.Type: GrantFiled: June 16, 1998Date of Patent: January 21, 2003Assignee: Ecole Polytechnique Federal de Lausanne (EPFL)Inventors: Martin Jordan, Florian Maria Wurm
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Patent number: 6495091Abstract: The invention is concerned with an integrated process for the manufacture of polymer and/or composite products, comprising the integration of processing operations to achieve a plurality of material conversion steps, such as impregnation, consolidation and bonding, within one single controlled fabrication cycle. The process includes an in-situ final preparation of at least one composite preform at the location of the moulding operation and an integrated moulding operation comprising a step of providing an additional matrix-functioning material into the mould to at least partially enclose the composite preform, the operation of providing the additional matrix-functioning material providing the pressure for an in-situ final consolidation of the composite product.Type: GrantFiled: November 18, 1997Date of Patent: December 17, 2002Assignee: Ecole Polytechnique Federale de LausanneInventors: Jan-Anders Manson, Pierre-Etienne Bourban, François Bonjour
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Patent number: 6489421Abstract: A linear water-soluble quaternary ammonium polymer having a homopolymeric chain of repeating unit of general formula (I): where each of R1 and R2 independently represents a member selected from the group consisting of linear or branched alkyl, hydroxyalkyl, alkoxyalkyl groups having from 1 to 6 carbon atoms, X− represents an anion and n is an integer comprised between 30 and 220 has been prepared. Furthermore, the polymer has a molar mass distribution of less than or equal to 1.5. The polymer is used as a displacer in a displacement mode of chromatography.Type: GrantFiled: September 18, 2000Date of Patent: December 3, 2002Assignee: Ecole Polytechnique Federale de LausanneInventors: Freitag Ruth, Wandrey Christine
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Publication number: 20020137858Abstract: A high molecular weight water soluble acrylamide based polymer having improved flocculating and dewatering properties is provided. The polymer is prepared by a process in which a small quantity of a chain branching agent is added to the polymerization reaction mixture continuously or stepwise while the monomers are polymerized. The polymer is useful in solid/liquid separations such as flocculants and coagulants in wastewater treatment applications, and as thickening agents.Type: ApplicationFiled: March 13, 2002Publication date: September 26, 2002Applicant: Ecole POlytechnique Federale De Lausanne (EPFL)Inventors: Jose Hernandez-Barajas, Christine Wandrey, David Hunkeler
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Publication number: 20020131464Abstract: An electrically pumped VCSEL and a method of its fabrication are presented. The VCSEL comprises an active cavity material sandwiched between top and bottom DBR stacks, the top DBR having at least one n-semiconductor layer. The device defines an aperture region between the structured surface of the active cavity material and the n-semiconductor layer of the top DBR stack. The structured surface is formed by a top surface of a mesa that includes at least the upper n++ layer of a p++/n++ tunnel junction and the surface of a p-type layer outside the mesa. The structured surface is fused to the surface of the n-semiconductor layer of the DBR stack due to the deformation of these surfaces, thereby creating an air gap in the vicinity of the mesa between the fused surfaces.Type: ApplicationFiled: March 15, 2001Publication date: September 19, 2002Applicant: Ecole Polytechnique Federale De LausanneInventors: Alexei Sirbu, Vladimir Iakovlev, Alok Rudra, Elyahou Kapon
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Publication number: 20020131458Abstract: A tunable Fabry-Perot vertical cavity photonic device and a method of its fabrication are presented. The device comprises top and bottom semiconductor DBR stacks and a tunable air-gap cavity therebetween. The air-gap cavity is formed within a recess in a spacer above the bottom DBR stack. The top DBR stack is carried by a supporting structure in a region thereof located above a central region of the recess, while a region of the supporting structure above the recess and outside the DBR stack presents a membrane deflectable by the application of a tuning voltage to the device contacts.Type: ApplicationFiled: March 15, 2001Publication date: September 19, 2002Applicant: Ecole Polytechnique Federale De LausanneInventors: Alexei Sirbu, Vladimir Iakovlev, Grigore Suruceanu, Alok Rudra, Elyahou Kapon
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Publication number: 20020132948Abstract: A high molecular weight water soluble acrylamide based polymer having improved flocculating and dewatering properties is provided. The polymer is prepared by a process in which a small quantity of a chain branching agent is added to the polymerization reaction mixture continuously or stepwise while the monomers are polymerized. The polymer is useful in solid/liquid separations such as flocculants and coagulants in wastewater treatment applications, and as thickening agents.Type: ApplicationFiled: March 13, 2002Publication date: September 19, 2002Applicant: Ecole Polytechnique Federale De Lausanne (EPFL)Inventors: Jose Hernandez-Barajas, Christine Wandrey, David Hunkeler
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Patent number: 6449338Abstract: An X-ray emission device having a microwave source and a resonant chamber. The resonant chamber contains a hermedically sealed volume of gas, a magnetic structure defining a geometrical electron-confinement zone in which electrons move at high speed. At least one target is placed in an electron path in order to emit X-rays. Each target is offset with respect to a mid-region of the geometrical conbinement zone.Type: GrantFiled: November 3, 2000Date of Patent: September 10, 2002Assignee: Ecole PolytechniqueInventors: Marthe Bacal Verney, Jean-Max Buzzi, Christelle Gaudin, Dominique De Lapparent, Claude Rouille, Laurent Schwartz, Konstantin Serebrennikov
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Patent number: 6426827Abstract: Electrochromic and photoelectrochromic devices using nanocrystalline semiconductor electrodes with a high specific surface area and surface-absorbed electrochromic molecules are disclosed.Type: GrantFiled: April 14, 2000Date of Patent: July 30, 2002Assignee: Ecole Polytechnique Federale de LausanneInventors: Pierre Bonhôte, Lorenz Walder, Michael Grätzel
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Patent number: 6320624Abstract: Given two video sequences, a composite video sequence can be generated which includes visual elements from each of the given sequences, suitably synchronized and represented in a chosen focal plane. For example, given two video sequences with each showing a different contestant individually racing the same down-hill course, the composite sequence can include elements from each of the given sequences to show the contestants as if racing simultaneously. A composite video sequence can be made also by similarly combining a video sequence with an audio sequence.Type: GrantFiled: January 16, 1998Date of Patent: November 20, 2001Assignee: Ecole Polytechnique FédéraleInventors: Serge Ayer, Martin Vetterli
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Patent number: 6294622Abstract: A high molecular weight water soluble acrylamide based polymer having improved flocculating properties is provided. The polymer is prepared by a process, in which a small quantity of a chain branching agent is added to the polymerization reaction mixture continuously or semi-continuously while the monomers are polymerized. The polymer is useful in solid/liquid separations such as flocculants and coagulants in waste water treatment applications, and as thickening agents.Type: GrantFiled: September 27, 1999Date of Patent: September 25, 2001Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Jose Hernandez Barajas, Christine Wandrey, David Hunkeler
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Patent number: 6258275Abstract: Affinity macroligands (AML) comprising a reversibly water soluble poly-N-alkylacrylamide linked to a ligand, and their use in the separation of a target substance from a mixture comprising the target substance and other materials are disclosed. Preferred AMLs have number average molar masses of less than 7,000 g/mol (chain length n typically about 25), mass distributions of less than 1.2 and narrow precipitation-solubility temperature (NPST) interval, typically in the range of 1-2° C.Type: GrantFiled: October 1, 1999Date of Patent: July 10, 2001Assignee: Ecole Polytechnique Federale de LausanneInventors: Ruth Freitag, Frédéric Garret-Flaudy
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Patent number: 6249588Abstract: The present invention relates to a new method and apparatus for authenticating documents such as banknotes, trust papers, securities, identification cards, passports, etc. The documents may be printed on any support, including transparent synthetic materials and traditional opaque materials such as paper. This invention is based on moire patterns occuring between superposed dot-screens. By using specially designed basic screen and master screen, where at least the basic screen is comprised in the document, a moire intensity profile of a chosen shape becomes visible in their superposition, thereby allowing the authentication of the document. If instead of the master screen a microlens array is used for the authentication purpose, the document comprising the basic screen may be printed on an opaque reflective support, thereby enabling the visualization of the moire intensity profile by reflection.Type: GrantFiled: August 28, 1995Date of Patent: June 19, 2001Assignee: Ecole Polytechnique Fédérale de LausanneInventors: Isaac Amidror, Roger D. Hersch
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Patent number: 6245988Abstract: A photosensitizer complex of formulae (Ia) MX3Lt or (Ib) MXYLt in which M is a transition metal selected from ruthenium, osmium, iron, rhenium and technetium, preferably ruthenium or osmium; each X is a co-ligand independently selected from NCS—, Cl—, Br—, I—, CN—, NCO—, H2O, NCN2−; pyridine unsubstituted or substituted by at least one group selected from vinyl, primary, secondary or tertiary amine, OH and C1-30 alkyl, preferably NCS—; and Lt is a tridentate ligand comprising heterocycles such as pyridine, thiophene, imidazole, pyrazole, triazole, carrying at least one carboxylic, phosphoric, hydoxamic acid or a chelating group. A photovoltaic cell comprising an electrically conductive layer deposited on a support to which at least one titanium dioxide layer has been applied and, as a photosensitizer applied to the titanium dioxide layer, a photosensitizer complex of formula (Ia) or Ib) as specified above.Type: GrantFiled: November 2, 1999Date of Patent: June 12, 2001Assignee: Ecole Polytechnique Federale de LausanneInventors: Michael Grätzel, Mohammad Khaja Nazeeruddin, Péter Péchy
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Patent number: 6208353Abstract: For annotating a digital image with information from a digital map, features which are visible from a viewer position are extracted from the map. The extracted features are matched with corresponding features in the image, and feature annotations are transferred from the map to the image to obtain an integrated view. The technique facilitates the annotation of photographs, and it can be included in navigation and simulation systems.Type: GrantFiled: September 5, 1997Date of Patent: March 27, 2001Assignee: Ecole Polytechnique Fedérale de LausanneInventors: Serge Ayer, Martin Vetterli
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Patent number: 6172902Abstract: A non-volatile random access memory (NVRAM) of the type with magnetoresistive memory elements (1) connected by sets of non-intersecting conductor sense lines (3, 4) which define the address of each memory element (1) and are connectable to a magnetic write/read recording unit. The memory elements are a plurality of magnetoresistive submicron dots or wires (1) embedded in a membrane (2) through which the submicron dots or wires extend. The sets of non-intersecting conductor sense lines (3, 4) are connected to the opposite ends of the submicron dots or wires (1) on opposite sides of the membrane.Type: GrantFiled: August 13, 1999Date of Patent: January 9, 2001Assignee: Ecole Polytechnique Federale de Lausanne (EPFL)Inventors: Jean-Eric Wegrowe, Jean-Philippe Ansermet, Scott E. Gilbert