Patents by Inventor Nachappa Gopalsami
Nachappa Gopalsami has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9462958Abstract: In some embodiments, the present disclosure relates to a medical device system, comprising: a medical device capable of receiving a plurality of body signal types, wherein the body signal types comprise an electrical body signal, a temperature body signal, or a pressure body signal; and an electrode operatively coupled to the medical device, the electrode capable of sensing a plurality of body signal types, wherein the body signal types comprise an electrical body signal, a temperature body signal, or a pressure body signal; the electrode comprising: an electrical sensor; a temperature sensor; and a pressure sensor.Type: GrantFiled: January 6, 2014Date of Patent: October 11, 2016Assignee: FLINT HILLS SCIENTIFIC, LLCInventors: Ivan Osorio, Nachappa Gopalsami, Apostolos C. Raptis, Stanislav Kulikov
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Patent number: 9103904Abstract: A mixerless high frequency interferometric Doppler radar system and methods has been invented, numerically validated and experimentally tested. A continuous wave source, phase modulator (e.g., a continuously oscillating reference mirror) and intensity detector are utilized. The intensity detector measures the intensity of the combined reflected Doppler signal and the modulated reference beam. Rigorous mathematics formulas have been developed to extract bot amplitude and phase from the measured intensity signal. Software in Matlab has been developed and used to extract such amplitude and phase information from the experimental data. Both amplitude and phase are calculated and the Doppler frequency signature of the object is determined.Type: GrantFiled: April 30, 2013Date of Patent: August 11, 2015Assignee: UChicago Argonne, LLCInventors: Shaolin Liao, Nachappa Gopalsami, Sasan Bakhtiari, Apostolos C. Raptis, Thomas Elmer
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Patent number: 9086487Abstract: A millimeter wave measurement system has been developed for remote detection of airborne nuclear radiation, based on electromagnetic scattering from radiation-induced ionization in air. Specifically, methods of monitoring radiation-induced ionization of air have been investigated, and the ionized air has been identified as a source of millimeter wave radar reflection, which can be utilized to determine the size and strength of a radiation source.Type: GrantFiled: March 16, 2012Date of Patent: July 21, 2015Assignee: UChicago Argonne, LLCInventors: Nachappa Gopalsami, Alexander Heifetz, Hual-Te Chien, Shaolin Liao, Eugene R. Koehl, Apostolos C. Raptis
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Patent number: 8941061Abstract: A compressive scanning approach for millimeter wave imaging and sensing. A Hadamard mask is positioned to receive millimeter waves from an object to be imaged. A subset of the full set of Hadamard acquisitions is sampled. The subset is used to reconstruct an image representing the object.Type: GrantFiled: March 28, 2012Date of Patent: January 27, 2015Assignee: UChicago Argonne, LLCInventors: Nachappa Gopalsami, Shaolin Liao, Thomas W. Elmer, Eugene R. Koehl, Alexander Heifetz, Apostolos C. Raptis
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Publication number: 20140320864Abstract: A mixerless high frequency interferometric Doppler radar system and methods has been invented, numerically validated and experimentally tested. A continuous wave source, phase modulator (e.g., a continuously oscillating reference mirror) and intensity detector are utilized. The intensity detector measures the intensity of the combined reflected Doppler signal and the modulated reference beam. Rigorous mathematics formulas have been developed to extract bot amplitude and phase from the measured intensity signal. Software in Matlab has been developed and used to extract such amplitude and phase information from the experimental data. Both amplitude and phase are calculated and the Doppler frequency signature of the object is determined.Type: ApplicationFiled: April 30, 2013Publication date: October 30, 2014Applicant: UChicago Argonne LLCInventors: Shaolin Liao, Nachappa Gopalsami, Sasan Bakhtiari, Apostolos C. Raptis, Thomas Elmar
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Publication number: 20140275830Abstract: In some embodiments, the present disclosure relates to a medical device system, comprising: a medical device capable of receiving a plurality of body signal types, wherein the body signal types comprise an electrical body signal, a temperature body signal, or a pressure body signal; and an electrode operatively coupled to the medical device, the electrode capable of sensing a plurality of body signal types, wherein the body signal types comprise an electrical body signal, a temperature body signal, or a pressure body signal; the electrode comprising: an electrical sensor; a temperature sensor; and a pressure sensor.Type: ApplicationFiled: January 6, 2014Publication date: September 18, 2014Applicant: Flint Hills Scientific, L.L.C.Inventors: Ivan Osorio, Nachappa Gopalsami, Apostolos C. Raptis, Stanislav Kulikov
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Patent number: 8686362Abstract: A millimeter wavelength (MMW) measurement system for remote detection of object characteristics and methods for detecting such characteristics. The MMW measurement system comprises a front-end and an optional signal conditioning component. The MMW front-end includes an oscillator, a transceiver portion, and an antenna for focusing a detection component comprising micrometer level wavelength electromagnetic radiation onto the object. A portion of the electromagnetic radiation reflected by the object is received by the MMW measurement system, which is indicative of a displacement of the object. The MMW system may be configured to detect micrometer level displacement of the object disposed tens of meters from the MMW measurement system. In various embodiments the object may be a natural object, including a human, and the displacement may be indicative of a heart rate and/or a respiratory function.Type: GrantFiled: April 29, 2010Date of Patent: April 1, 2014Assignee: UChicago Argonne, LLCInventors: Sasan Bakhtiari, Nachappa Gopalsami, Thomas W. Elmer, Apostolos C. Raptis
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Publication number: 20130257646Abstract: A compressive scanning approach for millimeter wave imaging and sensing. A Hadamard mask is position to receive millimeter waves from an object to be imaged. A subset of the full set of Hadamard acquisitions is sampled. The subset is used to reconstruct an image representing the object.Type: ApplicationFiled: March 28, 2012Publication date: October 3, 2013Inventors: Nachappa GOPALSAMI, Shaolin Liao, Thomas W. Elmer, Eugene R. Koehl, Alexander Heifetz, Apostolos C. Raptis
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Publication number: 20120242544Abstract: A millimeter wave measurement system has been developed for remote detection of airborne nuclear radiation, based on electromagnetic scattering from radiation-induced ionization in air. Specifically, methods of monitoring radiation-induced ionization of air have been investigated, and the ionized air has been identified as a source of millimeter wave radar reflection, which can be utilized to determine the size and strength of a radiation source.Type: ApplicationFiled: March 16, 2012Publication date: September 27, 2012Inventors: Nachappa Gopalsami, Alexander Heifetz, Hual-Te Chien, Shaolin Liao, Eugene R. Koehl, Apostolos C. Raptis
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Patent number: 8165682Abstract: A system and method for predicting and avoiding a seizure in a patient. The system and method includes use of an implanted surface acoustic wave probe and coupled RF antenna to monitor temperature of the patient's brain, critical changes in the temperature characteristic of a precursor to the seizure. The system can activate an implanted cooling unit which can avoid or minimize a seizure in the patient.Type: GrantFiled: July 31, 2006Date of Patent: April 24, 2012Assignee: Uchicago Argonne, LLCInventors: Nachappa Gopalsami, Stanislav Kulikov, Ivan Osorio, Apostolos C. Raptis
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Patent number: 7888645Abstract: Systems and methods for the passive measurement of spectral lines from the absorption or emission by polar molecules. The system includes mmW front-end assembly, back-end electronics, and data acquisition hardware and software was assembled. The method relates to methods for processing multi-channel radiometric data from passive mmW detection systems.Type: GrantFiled: February 16, 2009Date of Patent: February 15, 2011Assignee: UChicago Argonne LLPInventors: Nachappa Gopalsami, Sasan Bakhtiari, Apostolos C. Raptis, Thomas W. Elmer
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Publication number: 20100290063Abstract: A millimeter wavelength (MMW) measurement system for remote detection of object characteristics and methods for detecting such characteristics. The MMW measurement system comprises a front-end and an optional signal conditioning component. The MMW front-end includes an oscillator, a transceiver portion, and an antenna for focusing a detection component comprising micrometer level wavelength electromagnetic radiation onto the object. A portion of the electromagnetic radiation reflected by the object is received by the MMW measurement system, which is indicative of a displacement of the object. The MMW system may be configured to detect micrometer level displacement of the object disposed tens of meters from the MMW measurement system. In various embodiments the object may be a natural object, including a human, and the displacement may be indicative of a heart rate and/or a respiratory function.Type: ApplicationFiled: April 29, 2010Publication date: November 18, 2010Inventors: Sasan BAKHTIARI, Nachappa Gopalsami, Thomas W. Elmer, Apostolos C. Raptis
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Publication number: 20090216500Abstract: Systems and methods for the passive measurement of spectral lines from the absorption or emission by polar molecules. The system includes mmW front-end assembly, back-end electronics, and data acquisition hardware and software was assembled. The method relates to methods for processing multi-channel radiometric data from passive mmW detection systems.Type: ApplicationFiled: February 16, 2009Publication date: August 27, 2009Inventors: Nachappa Gopalsami, Sasan Bakhtiari, Apostolos C. Raptis, Thomas W. Elmer
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Patent number: 7495218Abstract: Systems and methods for the passive measurement of spectral lines from the absorption or emission by polar molecules. The system includes mmW front-end assembly, back-end electronics, and data acquisition hardware and software was assembled. The method relates to methods for processing multi-channel radiometric data from passive mmW detection systems.Type: GrantFiled: April 20, 2006Date of Patent: February 24, 2009Assignee: U Chicago Argonne LLCInventors: Nachappa Gopalsami, Sasan Bakhtiari, Apostolos C. Raptis, Thomas W. Elmer
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Publication number: 20070246652Abstract: Systems and methods for the passive measurement of spectral lines from the absorption or emission by polar molecules. The system includes mmW front-end assembly, back-end electronics, and data acquisition hardware and software was assembled. The method relates to methods for processing multi-channel radiometric data from passive mmW detection systems.Type: ApplicationFiled: April 20, 2006Publication date: October 25, 2007Inventors: Nachappa Gopalsami, Sasan Bakhtiari, Apostolos Raptis, Thomas Elmer
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Patent number: 7223608Abstract: A dielectric sensing method and apparatus are provided for detection and classification of chemical and biological materials. Resonance patterns of a sample within a resonator are detected for identifying a shift in resonance frequency and a change of line width before and after introduction of the sample. The identified shift in resonance frequency and change of line width are used for determining a complex dielectric constant of the sample for the material detection and classification. A degree of selectivity at any excitation frequency is enabled for the dielectric sensing method from the manner in which the complex dielectric constant of a material affects the resonance pattern of the resonator with respect to shift in resonance frequency and the change in line width. By selecting the excitation frequencies to generally correspond to one of the resonance frequencies of the sample material under test, the degree of selectivity and the sensitivity of detection are enhanced.Type: GrantFiled: August 8, 2003Date of Patent: May 29, 2007Assignee: U Chicago Argonne LLCInventors: Nachappa Gopalsami, Apostolos C. Raptis
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Publication number: 20070073150Abstract: A system and method for predicting and avoiding a seizure in a patient. The system and method includes use of an implanted surface acoustic wave probe and coupled RF antenna to monitor temperature of the patient's brain, critical changes in the temperature characteristic of a precursor to the seizure. The system can activate an implanted cooling unit which can avoid or minimize a seizure in the patient.Type: ApplicationFiled: July 31, 2006Publication date: March 29, 2007Inventors: Nachappa Gopalsami, Stanislav Kulikov, Ivan Osorio, Apostolos Raptis
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Publication number: 20050032233Abstract: A dielectric sensing method and apparatus are provided for detection and classification of chemical and biological materials. Resonance patterns of a sample within a resonator are detected for identifying a shift in resonance frequency and a change of line width before and after introduction of the sample. The identified shift in resonance frequency and change of line width are used for determining a complex dielectric constant of the sample for the material detection and classification. A degree of selectivity at any excitation frequency is enabled for the dielectric sensing method from the manner in which the complex dielectric constant of a material affects the resonance pattern of the resonator with respect to shift in resonance frequency and the change in line width. By selecting the excitation frequencies to generally correspond to one of the resonance frequencies of the sample material under test, the degree of selectivity and the sensitivity of detection are enhanced.Type: ApplicationFiled: August 8, 2003Publication date: February 10, 2005Inventors: Nachappa Gopalsami, Apostolos Raptis
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Publication number: 20030001299Abstract: A non-intrusive method of determining temperature and for controlling the Electroconsolidation process is described which is based on the change with temperature of the velocity of sound as it passes through a material. Ultrasonic transducers located outside of the die, but positioned to transmit and receive an ultrasonic signal, are used to determine an average temperature in the line of sight of the transmitted signal. A single-loop feedback system may be used to control the temperature based upon a comparison of the measured temperature to the desired temperature.Type: ApplicationFiled: June 29, 2001Publication date: January 2, 2003Inventors: Nachappa Gopalsami, Hual-Te Chien
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Patent number: 5886534Abstract: A millimeter wave sensor is provided for non-destructive inspection of thin sheet dielectric materials. The millimeter wave sensor includes a Gunn diode oscillator (GDO) source generating a mill meter wave electromagnetic energy signal having a single frequency. A heater is coupled to the GDO source for stabilizing the single frequency. A small size antenna is coupled to the GDO source for transmitting the millimeter wave electromagnetic energy signal to a sample material and for receiving a reflected millimeter wave electromagnetic energy signal from the sample material. Ferrite circulator isolators coupled between the GDO source and the antenna separate the millimeter wave electromagnetic energy signal into transmitted and received electromagnetic energy signal components and a detector detects change in both amplitude and phase of the transmitted and received electromagnetic energy signal components.Type: GrantFiled: September 9, 1997Date of Patent: March 23, 1999Assignee: The University of ChicagoInventors: Sasan Bakhtiari, Nachappa Gopalsami, Apostolos C. Raptis