Vassiliou
Christophoros C. Vassiliou, Cambridge, MA US
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20100136517 | MATRIX STABILIZATION OF AGGREGATION-BASED ASSAYS - Methods and apparatus for stabilization of aggregation-based assays are described. In various embodiments, anti-analytes are dispersed within a matrix. A solution containing analytes brought into contact with the matrix, so that analytes may permeate throughout at least a portion of the matrix. In some embodiments, the anti-analytes and analytes are mobile within the matrix. As aggregates form and increase in size, the aggregates become substantially immobile within the matrix. As a result, signals representative of an amount of aggregation within the matrix can remain substantially constant. In various aspects, matrix-stabilized aggregation-based assays provide for reliable quantitative analysis of analyte concentration with test solutions. | 06-03-2010 |
20130150707 | IMPLANTABLE MAGNETIC RELAXATION SENSORS AND METHODS OF MEASURING A SENSOR'S CUMULATIVE EXPOSURE TO A BIOMARKER - An implantable magnetic relaxation sensor is provided that comprises superparamagnetic nanoparticies functionalized with one or more agents that bond with a biomarker of interest. The sensor is configured for minimally-invasive implantation into a human or animal, and is configured to indicate the implanted sensor's cumulative exposure to the biomarker of interest by analysis using magnetic resonance relaxometry. | 06-13-2013 |
20140004503 | Device and Method for Sampling Bodily Fluid for Medical Analytes in Ultra Low Concentrations | 01-02-2014 |
Christophoros C. Vassiliou, El Cerrito, CA US
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20160120438 | NMR SENSOR AND METHODS FOR RAPID, NON-INVASIVE DETERMINATION OF HYDRATION STATE OR VASCULAR VOLUME OF A SUBJECT - The invention features methods for detecting the hydration state or vascular volume of a subject using a device capable of nuclear magnetic resonance (NMR) measurement. The methods involve exposing a portion of a tissue of the subject in vivo to a magnetic field and RF pulse from the device to excite hydrogen nuclei of water within the tissue portion, and measuring a relaxation parameter of the hydrogen nuclei in the tissue portion, the relaxation parameter being a quantitative measure of the hydration state or vascular volume of the subject as a whole. The invention also features devices and computer-readable storage media for per forming the methods of the invention. | 05-05-2016 |
Christophoros Christou Vassiliou, Cambridge, MA US
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20130046164 | Implantable Dissolved Oxygen Sensor and Methods of Use - A sensor is provided for measuring a dissolved oxygen concentration in vivo when implanted at a tissue site and in ex vivo applications. The sensor includes an article comprising a sensing medium retained within the implantable article by an oxygen-permeable material. The sensing medium comprises an MR contrast agent for oxygen. The sensor is configured to indicate the dissolved oxygen concentration of a fluid, e.g., in vivo at the tissue site, when subjected to an MR-based method. | 02-21-2013 |
Evros Vassiliou, Franklin Lakes, NJ US
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20130065866 | DENTINAL DRUG DELIVERY COMPOSITION AND SCREENING METHOD - The present invention is a dentinal drug delivery composition composed of cationic and/or neutral porous particles containing an effective amount of a therapeutic agent, a method for using the dentinal drug delivery to provide a dental treatment, and a method for identifying anti-inflammatory agents capable of diffusing through dentin. | 03-14-2013 |
20150374839 | NOVEL FATTY ACID-SALICYLATE CONJUGATES WITH ENHANCED THERAPEUTIC PROPERTIES - The invention provides compositions and methods for treating or preventing cancer with an inventive composition. The invention relates to the fields of biomedicine, pharmacology, and molecular biology. | 12-31-2015 |
Iason Vassiliou, Berkeley, CA US
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20090088086 | MODIFIED DUAL BAND DIRECT CONVERSION ARCHITECTURE THAT ALLOWS EXTENSIVE DIGITAL CALIBRATION - A communication device may include one or more circuits in an integrated transmitter and receiver that includes a transmit path and a receive path. The transmit path may include an I processing baseband transmit path and a Q processing baseband transmit path. The receive path may include an I processing baseband receive path and a Q processing baseband receive path. The one or more circuits may enable sharing a first common filter by the I processing baseband transmit path and the I processing baseband receive path. The one or more circuits may also enable sharing a second common filter by the Q processing baseband transmit path and the Q processing baseband receive path. The first common filter and the second common filter are independently programmable to adjust a phase and/or a gain of the said first common filter, and/or a phase and/or a gain of the second common filter. | 04-02-2009 |
20100233971 | DIRECT-CONVERSION TRANSCEIVER ENABLING DIGITAL CALIBRATION - A method for calibrating a transceiver includes selecting one of a plurality of available calibration paths on the transceiver to be active. The transceiver includes a transmitter and a receiver. The selected one of the plurality of available calibration paths couples the transmitter to the receiver through a circuit that is external to the transceiver. A calibration signal may be provided to enable calibration of the transceiver via the selected one of the plurality of available calibration paths. The calibration signal may be received after it has passed through the selected one of the plurality of calibration paths. Characteristics of the transceiver may be measured using the received calibration signal. | 09-16-2010 |
Iason Vassiliou, Athens GR
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20130137381 | Split Microwave Backhaul Transceiver Architecture with Coaxial Interconnect - A communication system includes a conversion module configured to convert a signal between a radio frequency baseband (RF-BB) and an intermediate frequency (IF). At least one RF front-end module converts the signal between the IF and a radio frequency (RF). The RF front-end module is configured as an RF phased array and includes a coaxial interconnect configured to connect the conversion module with the RF front-end module. The signal is transmitted between the conversion module and the RF-front end module via the coaxial interconnect. At least one RF front-end module includes an active front-end (AFE) configured to allow the signal to be transmitted via the coaxial interconnect while minimizing any deterioration of the signal. | 05-30-2013 |
Iason F. Vassiliou, Athens GR
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20100167673 | METHOD AND SYSTEM FOR RF FRONT-END CALIBRATION SCHEME USING FRACTIONAL-N FREQUENCY SYNTHESIZED SIGNALS AND RSSI - Aspects of a method and system for an RF front-end calibration scheme using signals from a fractional-N frequency synthesized and received signal strength indicator (RSSI) are provided. A frequency synthesizer within a wireless receiver may generate a signal for dynamically modifying a gain in an integrated low-noise amplifier (LNA) for each selected receiver channel. The frequency-synthesized signals may be applied to at least one tunable load communicatively coupled to the LNA. The tunable load may be an input load or an output load. The signal generated by the frequency synthesizer may be sequentially applied to the input load and the output load. A logarithmic amplifier may generate an RSSI signal from the LNA output during the calibration process. The RSSI signal may be utilized for controlling a tunable load coupled to the LNA and optimize the tuning of the LNA in a desired channel by adjusting the tunable load. | 07-01-2010 |
Iason Fillipos Vassiliou, Athens GR
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20100205639 | Method and System for a Programmable Biasing Mechanism for a Mobile Digital Television Environment - Certain aspects of a method and system for programmable biasing mechanism for a mobile digital television environment are disclosed. Aspects of one method may include controlling a bias of components within each of a plurality of radio frequency (RF) front-ends that comprise low noise amplifiers (LNAs) integrated within a single chip multi-band RF receiver, and of components within each of a plurality of baseband processors integrated within the single chip multi-band RF receiver. The controlling of the bias is based on signal power measurements within the integrated RF front-ends and within the baseband processors, and each of the plurality of RF front-ends handles processing of at least one of: a received UHF signal and a received L-band signal. | 08-12-2010 |
John Vassiliou, Berwyn, PA US
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20130088204 | METHOD AND SYSTEM FOR MAGNETIC FIELD PROBING FOR SEALED-ACID BATTERY DIAGNOSIS - A system and method for determining the health of a battery. A primary coil may be positioned along a first portion of a battery and a secondary coil may be positioned along a second portion of the battery. The primary coil may then be excited with a signal, and an electromagnetic field induced in the secondary coil by the excited primary coil may be measured. A state of health of the battery may thus correlate to the measured electromagnetic field during operation of the battery. This state of health may be determined as a function of electrolyte stratification, current profile, electrode structure, electrode surface degradation, and combinations thereof. | 04-11-2013 |