Sivaprakasam
Balaprakash Sivaprakasam, Chennai IN
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20080244679 | SWITCHED DIGITAL VIDEO CLIENT REVERSE CHANNEL TRAFFIC REDUCTION - Systems and methods are disclosed for enabling a switched digital video (SDV) client to intelligently generate and transmit reverse request in a SDV system. In this manner, reverse channel traffic is reduced. During rapid channel changes using the up and down keys on a remote control, the SDV client waits a predetermined amount of time before generating a reverse request that is subsequently transmitted upstream to a headend server. By way of example, changing broadcasted channels quickly will not generate a reverse request until the predetermined amount of time is over. In the event that a changed channel is an SDV session, a program select request is immediately generated in order to begin receiving the SDV session. | 10-02-2008 |
Kannan Sivaprakasam, St. Cloud, MN US
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20130243621 | Miniature Pumps - Miniature pumps for dispensing a volume a flowable substance are described. One pump embodiment includes an environmentally-responsive plug layer that can contract in size, e.g., when exposed to an environmental change such as temperature, to allow an activation solution to flow to a layer of expandable material, such as a superporous hydrogel. Expansion of the expandable material urges a diaphragm into a chamber that holds the dispensable fluid, gas, or gel, forcing the fluid, gas or gel out of the pump. | 09-19-2013 |
Navamitran Sivaprakasam, Tustin, CA US
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20110119157 | Accepting Payment Information on the Web Using Interactive Voice response (IVR) System - Checkout with PaybyPhone - Alternative method of paying through a credit card using an Interactive voice response (IVR) system redirected from the web page (Checkout with PaybyPhone) from payment portion of the checkout page, rather than the conventional way of entering through the web page. A system and method for paying by a credit card, preferably at a point of sale, is disclosed. The system employs an automated interactive voice response system preferably sponsored by client (Website owner). The user calls into the system using a standard telephone, and enters credit payment information about the customer using the key pad of the telephone in response to verbal questions posed by the system. In one embodiment, only numeric information concerning the customer is entered, such as the customer's credit card number, expiry date . . . etc. This credit card payment information is used to approve/decline via credit bureau database or a third party vendor who specializes in credit card payment processing, which is used by the system to electronically decide whether to proceed with the order or not. The system verbally provides information to the user regarding the results of credit card validation, so that the customer's credit purchase can be quickly completed. | 05-19-2011 |
Prasanna Sivaprakasam, Middletown, CT US
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20150232480 | Imidazopyridine Macrocycles as Inhibitors of Human Immunodeficiency Virus Replication - The disclosure generally relates to compounds of formula I, including compositions and methods for treating human immunodeficiency virus (HIV) infection. The disclosure provides novel inhibitors of HIV, pharmaceutical compositions containing such compounds, and methods for using these compounds in the treatment of HIV infection. | 08-20-2015 |
Sidhananda K. Sivaprakasam, Chennai IN
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20120087315 | Multiple Wired Client Support on a Wireless Workgroup Bridge - A method is provided to receive and transmit network frames across a network. A wireless access point device is configured operate as a wireless bridge (e.g., wireless workgroup bridge) to reserve a predetermined number of bits of a media access control (MAC) address of the wireless access point device. Combinations of the predetermined number of bits can be assigned by the wireless access point device to respective ones of a plurality of wired clients of the wireless access point device. The wireless access point device can store data that maps the combinations of the predetermined number of bits of the mapped MAC addressees. The access point device can then process downstream network frames received wirelessly from a root wireless access point and can process upstream network frames received from the plurality of wired clients. | 04-12-2012 |
Sidhananda Karthikeyan Sivaprakasam, Pondicherry IN
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20130148641 | TECHNIQUES TO ACHIEVE ZERO ROAMING TIME FOR WORKGROUP BRIDGE DEVICES - Techniques are provided for providing seamless wireless communication services to client devices associated with an roaming workgroup bridge device to enable wireless communications between the client devices and a network using a first radio transceiver unit in communication with a first root access point device that provides connectivity to the network. The workgroup bridge device scans a frequency band to detect a second wireless root access point device using a second radio transceiver unit. Signal strength values of signals received by the first radio transceiver unit are compared to a threshold signal strength value. When the signal strength of the received signals is below the threshold, communication services are provided to the client devices using the second radio transceiver unit in communication with the second root access point device. Communications between the client devices and the first root access point device are then terminated. | 06-13-2013 |
Srinivas Sivaprakasam, Milpitas, CA US
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20160118722 | WIRELESS COMMUNICATION ANTENNAE FOR CONCURRENT COMMUNICATION IN AN ACCESS POINT - One or more access points in a wireless communication system, wherein at least one of those access points includes a set of more than one antennae capable of concurrent communication, and at least one of those more than one antennae is isolated from a remainder of that set of antennae during concurrent communication. Isolation includes one or more of disposed a first antenna in a null region of a second antenna, disposing a first antenna to communicate polarized and substantially orthogonal to a second antenna, disposing a set of antennae to communicate at two or more carrier frequencies, wherein each first antenna adjacent to a second antenna operate at distinct such carrier frequencies, or disposing a set of antennae to communicate using two or more substantially distinct protocols, wherein substantially each first antenna adjacent to a second antenna operate at substantially distinct such protocols. | 04-28-2016 |
Srinivas Sivaprakasam, Fremont, CA US
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20120308235 | Integrated Commercial Communications Network Using Radio Frequency and Free Space Optical Data Communication - A stabilized ultra-high bandwidth capacity transceiver system that combines an E-band (71-76 GHz, 81-86 GHz) millimeter wave RF transceiver with an eye-safe adaptive optics Free Space Optical (FSO) transceiver as a combined apparatus for simultaneous point-to-point commercial communications. The apparatus has a high degree of assured carrier availability under stressing environmental conditions. The apparatus establishes and maintains pointing and stabilization of mmW RF and FSO optical beams between adjacent line of sight apparatuses. The apparatus can rapidly acquire and reacquire the FSO optical carrier link in the event the optical carrier link is impaired due to adverse weather. | 12-06-2012 |
20140307835 | CARRIER FREQUENCY AND PHASE RECOVERY IN QUADRATURE ENCODED E-BAND COMMUNICATIONS - A mechanism for retrieval of carrier frequency and carrier phase in a received modulated carrier waveform. Retrieval of carrier frequency and carrier phase can be implemented in an analog electrical circuit, using a field programmable gate array (FPGA), or in computer code. Independent of the implementation, the mechanism performs frequency and primary phase recovery by forcing transforms of a pilot tone in the upper and lower sidebands to the same frequency using a feedback loop. The difference-in-magnitudes of the channelized pilot are used by a phase lock loop to perform secondary phase recovery in a manner that also resolves phase sign ambiguity. Benefits of this mechanism include improved phase lock loop tracking performance and a reduction of noise in the data demodulated from the received carrier waveform. | 10-16-2014 |
20150092877 | HIGH THROUGHPUT INTERFERENCE CANCELLING RADIO TRANSCEIVER AND ANTENNA THEREFOR - A system for wireless transmission of signals is provided. A first radio unit is configured to communicate desired communication signals with a second radio unit. The first radio unit has a plurality of antennas configured to simultaneously receive a plurality of desired communication signals within a frequency channel. The first radio unit is configured to correlate signals received among its antennas to obtain one or more correlation coefficients, and using the correlation coefficients, the first radio unit is configured to multiply a received signal experiencing interference within the channel by an obtained correlation coefficient in order to remove interfering signals from the desired signals. | 04-02-2015 |
20150098707 | Integrated Commercial Communications Network Using Radio Frequency and Free Space Optical Data Communication - A stabilized ultra-high bandwidth capacity transceiver system that combines an E-band (71-76 GHz, 81-86 GHz) millimeter wave RF transceiver with an eye-safe adaptive optics Free Space Optical (FSO) transceiver as a combined apparatus for simultaneous point-to-point commercial communications. The apparatus has a high degree of assured carrier availability under stressing environmental conditions. The apparatus establishes and maintains pointing and stabilization of mmW RF and FSO optical beams between adjacent line of sight apparatuses. The apparatus can rapidly acquire and reacquire the FSO optical carrier link in the event the optical carrier link is impaired due to adverse weather. | 04-09-2015 |
Vasanthi Sivaprakasam, Waldorf, MD US
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20120105849 | POLARIZED ELASTIC SCATTER DETECTION METHOD AND SYSTEM OF TRACKING AND MEASURING THE VELOCITY OF INDIVIDUAL AEROSOL PARTICLES - Measuring and tracking velocity of individual aerosol particles in a bio-threat detection system are accomplished using a single beam laser source in combination with a birefringent crystal that splits the laser beam into two beams having orthogonal polarization. Scattered light is collected with an elliptical reflector and directed into two detection channels, sampling total elastic scatter in the first channel and sampling polarized elastic scatter in the second channel. The difference in intensity of the scattered light in the polarized channel is used to identify the position of the particles. By taking the ratio of signal output from the polarized detector to the total scatter detector, a threshold level can be established to determine the presence of particles traversing the two beams. The particles are time stamped as they traverse the two beams and the time difference between the pulses can be used to measure the velocity of the particles. | 05-03-2012 |
Vasanthi Sivaprakasam, Washington, DC US
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20120001094 | DEEP-UV LED AND LASER INDUCED FLUORESCENCE DETECTION AND MONITORING OF TRACE ORGANICS IN POTABLE LIQUIDS - An apparatus for measuring fluorescence of potable liquids contained within an optical quartz cell includes a deep UV laser or a compact UV LED that generates a light beam. A UV blocking and visible light transmitting optical filter reduces out-of-band emission from the LED. The optical quartz cell is between a pair of plane mirrors so that light from the light source travels through it several times. A concave mirror collects a fluorescence signal and has a common optical axis with a lens. The common optical axis is normal to an optical axis of the light beam. The concave mirror and lenses are positioned on opposite sides of the optical quartz cell. A fluorescence detector is in optical alignment with the concave mirror and the lens. A boxcar averager is in electrical communication with the fluorescence detector. Optical wavelength selection of the fluorescence emission uses optical filters or a spectrometer. | 01-05-2012 |