Vaidya, TX
Bikas Vaidya, College Station, TX US
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20080278708 | NANOCOMPOSITE MATERIAL FOR DIRECT SPECTROSCOPIC DETECTION OF CHEMICAL VAPORS - Method and material for spectroscopic detection of organic chemicals. The material is a substantially optically transparent solid, such as ZnS, having a high surface area for adsorption of an analyte, such as organic chemical vapors. The solid material preferably has metal nanoparticles, such as gold, silver or copper nanoparticles, deposited on the surface for signal enhancement. A template compound, such as cetyl trimethyl ammonium bromide and alkoxylate block polymers, may be used during the material synthesis, such as reacting zinc chloride and sodium sulfide in the presence of the template compound, and later removed through calcination and washing to achieve the high surface area. The method of use includes collecting an analyte on the material and detecting the spectroscopic response of the analyte while it is collected on the surface. The mechanism of collection may include adsorbing, absorbing, and preconcentrating. Preferably, the spectroscopic response is selected from infrared spectra or ultraviolet-visible spectra. | 11-13-2008 |
20090017549 | Apparatus and Method for Determining The Concentration of Iodine-Containing Organic Compounds in an Aqueous Solution - A method for determining the amount of a known iodine-containing organic compound in an aqueous solution. The method comprises electrochemically reducing the known iodine-containing organic compound in an aqueous medium to release iodide anions, chemically oxidizing the iodide anions to produce molecular iodine, and measuring the amount of molecular iodine. The known iodine-containing organic compound is preferably an aryl iodide, such as Iothalamate. Other preferred iodine-containing organic compounds include various glomerular filtration rate (GFR) marker compounds in plasma or urine samples, as useful in the measurement of GFR for an animal. The electrochemical reduction of the known iodine-containing organic compound is preferably performed in an electrochemical cell including a working electrode separated from a counter electrode by a cation exchange membrane. The working electrode most preferably includes bismuth and the counter electrode most preferably includes platinum. | 01-15-2009 |
20100053605 | GAS SAMPLING DEVICE AND METHOD FOR COLLECTION AND IN-SITU SPECTROSCOPIC INTERROGATION OF VAPORS AND AEROSOLS - A gas sampling device, analyte detection system, and methods for identifying a vapor or aerosol analyte suspended in a gas are described. The gas sampling device comprises a chamber having a gas inlet port, a substrate, one or more gas outlet ports near the substrate, and a pump. The gas outlet ports direct airflow to a reflecting substrate coated with a spectroscopically-transparent material. Analytes are deposited on the coated substrate through impaction, for massive aerosols, and diffusion through the viscous boundary layer, for vapor analytes. In one analyte detection system, a spectroscopic instrument is positioned behind a window opposite the substrate to interrogate the coated substrate surface as analytes are collected. An alternate detection system combines the gas sampling device with a detector in fluid communication with the gas outlet ports from the chamber, wherein the substrate is used as an analyte concentrator. | 03-04-2010 |
Chandrashekhar M. Vaidya, Sugar Land, TX US
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20110004586 | SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR CREATING A VIRTUAL DATABASE - A virtual database is attached to a server database management system (“DBMS”) such that the DBMS believes it needs to recover the database to a last known point of consistency. In order to perform this recovery, the DBMS requests the transaction log file entries to be read from what it believes is the database's transaction log file. However, the requests are intercepted and translated (unbeknownst to the DBMS) instead into requests to read the transaction log portion of the backup file. The DBMS then uses the transaction log records to bring the database to a point of transactional consistency, unaware that the log records are actually being sourced from the transaction log portion of the backup file. All changes made to the data during the recovery phase and later during the execution of any TSQL statements which insert, update, or delete data are routed into a cache file. Accordingly, a “virtual” database is created and used by the server DBMS engine as if it were a real database. | 01-06-2011 |
Chandrashekhar Madhukar Vaidya, Sugar Land, TX US
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20120117033 | METHOD AND APPARATUS FOR PERFORMING A NEAR-INSTANTANEOUS RESTORE OF A DATABASE - Some embodiments provide methods and apparatuses for performing a near-instantaneous restore of a database. During operation, the system intercepts a database management system restore request to restore a database from a backup file to a data file, wherein the backup file comprises a first number (e.g., N | 05-10-2012 |
Kellie Kozak Vaidya, Fort Worth, TX US
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20140037579 | Inhibition of Dendritic Cell-Driven Regulatory T Cell Activation and Potentiation of Tumor Antigen-Specific T Cell Responses by Interleukin-15 and MAP Kinase Inhibitor - The invention involves the discovery that if dendritic cells loaded with a tumor antigen are cultured in interleukin-15 (IL-15), or if T cells activated by the dendritic cells are cultured in IL-15, Treg activity that is specific for the tumor antigen is reduced. This reduction in Treg activity results in an increase in anti-tumor immune response. Another embodiment of the invention involves the discovery that incubating dendritic cells with a MAP kinase inhibitor in combination with IL-15 gives synergistic benefits when the dendritic cells are used to activate T cells. Dendritic cell and T cell compositions incubated with IL-15 or a MAP kinase inhibitor are provided. | 02-06-2014 |
Mihir Vaidya, Dallas, TX US
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20090043627 | System and method for calendar presence retrieval - A presence system enables retrieval of calendar presence information of presentities from calendar servers using a calendar agent and calendar interfaces to the calendar servers. Each calendar server maintains calendar schedule information for one or more of the presentites. The calendar agent is operable to generate queries for the calendar schedule information to the calendar servers via a respective calendar interface for each calendar server. The calendar agent is further operable to receive calendar schedule information from the calendar servers via the respective calendar interfaces, and to convert the received calendar schedule information into calendar presence information. Each calendar interface is configured to communicate with the calendar agent via a first protocol and to communicate with a respective one of the calendar servers via a respective second protocol. | 02-12-2009 |
Nitin Vaidya, Missouri City, TX US
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20090250228 | WELL PACKERS AND CONTROL LINE MANAGEMENT - An example of a wellbore tool assembly includes a mandrel having an outer surface and a longitudinal bore; a tubular, swellable seal member having opposing ends and an inner surface defining a bore between the opposing ends, the seal member encircling a portion of the mandrel; an operable downhole element carried with the mandrel; and a control line connected to the operable downhole element, the control line extending from the downhole element between the outer surface of the mandrel and the inner surface of the seal member to the other side of the seal member from the downhole element. | 10-08-2009 |
20100012708 | OILFIELD TOOLS COMPRISING MODIFIED-SOLDERED ELECTRONIC COMPONENTS AND METHODS OF MANUFACTURING SAME - Oilfield tools, assemblies and methods of manufacturing same are described comprising a modified-soldered electronic component, wherein the modified-solder includes a high-melting metal matrix and from about 0.1 to about 20 weight percent, based on total weight of the modified solder, of a strength-reinforcing additive dispersed in the metal matrix, the additive comprising a polyhedral oligomeric silsesquioxane. Methods of using the oilfield tools and assemblies in oilfield operations are also described. | 01-21-2010 |
20110132611 | TEMPERATURE-ACTIVATED SWELLABLE WELLBORE COMPLETION DEVICE AND METHOD - Disclosed herein is a completion device that includes an interior layer that swells when exposed to a wellbore fluid; and an exterior layer encasing the interior layer and configured to be impermeable to the wellbore fluid at temperatures below an activation depth temperature, and configured to be permeable to the wellbore fluid at temperatures above the activation depth temperature. Also disclosed herein is a method of deploying a completion device that includes encasing an interior layer of the device in a temperature-sensitive exterior layer that is impermeable to a fluid in the wellbore at temperatures below an activation depth temperature; attaching the device on a tube string; inserting the tube string into the wellbore; creating a leak path in the temperature-sensitive exterior layer in response to the device being exposed to the activation depth temperature in the wellbore; and swelling the interior layer with the wellbore fluid. | 06-09-2011 |
Nitin Vaidya, Sugar Land, TX US
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20120175134 | OILFIELD APPARATUS AND METHOD COMPRISING SWELLABLE ELASTOMERS - The subject disclosure discloses apparatus and methods that are particularly suited for creating a seal in a borehole annulus. More particularly, the subject disclosure discloses a seal with enhanced sealing capability. In one embodiment the subject disclosure discloses a reinforced and permanent swellable packer device. | 07-12-2012 |
Nitin Y. Vaidya, Sugar Land, TX US
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20100139930 | SYSTEM AND METHOD TO SEAL USING A SWELLABLE MATERIAL - The invention is a sealing system, such as a packer, that is used in a wellbore to seal against an exterior surface, such as a casing or open wellbore. The sealing system includes a swellable material that swells from an unexpanded state to an expanded state thereby creating a seal when the swellable material comes into contact with a triggering fluid. | 06-10-2010 |
Rajesh Vaidya, Austin, TX US
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20100031181 | Function Specific Property Nodes for Graphical Programs - System and method for accessing properties of a pre-defined object in a graphical program (GP) operable to perform first functionality. A node icon is displayed in the GP and coupled to the pre-defined object in response to user input, and is associated with program instructions executable to only provide access to a plurality of properties corresponding to the object, and specifying configuration of the object, where the object is associated with a subset of the first functionality. Available properties of the object are displayed, and user input indicating the plurality of properties received. The GP is executed, including executing the property node to: receive input specifying modification of a property, and modify the property to configure the object to perform the subset of the first functionality; and/or to read the property from the pre-defined object, and provide the property to a graphical program element of the GP, e.g., for display. | 02-04-2010 |