Patents and Patent Applications from Virginia Tech


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US20170302270 METHOD AND APPARATUS FOR CURRENT/POWER BALANCING  
Aspects of the disclosure provide a system having a power circuit. The power circuit includes a first switch circuit having at least a first transistor and a second switch circuit having at least...
US20170300657 Computerized Event Simulation Using Synthetic Populations  
Systems, methods, and computer-readable media for simulating the course of an event are provided. A processing unit can receive attributes of a synthetic population and select a...
US20170298032 SPHINGOSINE KINASE INHIBITORS  
Sphingosine kinases are enzymes that catalyze the biosynthesis of sphingosine-1-phosphate. The invention provides compounds that are effective for inhibition of sphingosine kinase type 1,...
US20170296700 STEM CELL COMPOSITIONS, SYSTEMS AND USES THEREOF  
Described herein are stem cells and stem cell compositions that can be used to treat soft tissue injuries, including tendon and ligament injuries. Also described herein are cellular scaffolds that...
9792985 Resistive volatile/non-volatile floating electrode logic/memory cell  
A resistive floating electrode device (RFED) provides a logic cell or non-volatile storage or dynamic or static random access memory on an extremely compact matrix with individual cells scalable...
9789492 Cleaning and dewatering fine coal  
Fine coal is cleaned of its mineral matter impurities and dewatered by mixing the aqueous slurry containing both with a hydrophobic liquid, subjecting the mixture to a phase separation. The...
US20170294833 Multiphase Coupled and Integrated Inductors with Printed Circuit Board (PCB) Windings for Power Factor Correction (PFC) Converters  
A power factor correction (PFC) power converter, particularly of a multiphase totem-pole or other topology presenting a switching bridge that can potentially provide bi-directional power transfer...
9786832 Energy harvester  
An energy harvester for converting vibration energy into electrical energy and harvesting the electrical energy includes: a base; a clamping structure which is supported by the base and is spaced...
US20170279471 Transmitting Wideband Signals Through an Electrically Small Antenna Using Antenna Modulation  
The present invention provides methods and devices to radiate wideband signals. The devices may include a tunable high Q narrowband antenna having a plurality of ports including a feed port and a...
9773967 Processing method for grain-oriented lead-free piezoelectric Na0.5Bi0.5TiO3—BaTiO3 ceramics exhibiting giant performance  
Textured ceramic compositions having improved piezoelectric characteristics as compared with their random counterparts are provided. Methods of making the compositions and devices using them are...
US20170266438 SELECTIVE MODULATION OF INTRACELLULAR EFFECTS OF CELLS USING PULSED ELECTRIC FIELDS  
A system and method for selectively treating aberrant cells such as cancer cells through administration of a train of electrical pulses is described. The pulse length and delay between successive...
US20170253712 Gelation, Aerogel Formation and Reactions Thereof to Produce Non-Random Functionalization of Poly (Aryl Ether Ketones)  
The present invention provides a gel comprising a physical network formed of polymer chain crystallites interconnected by amorphous chain segments. Functionalization of the chain segments between...
US20170246282 MULTIVALENT BRUCELLA VACCINE FOR PROTECTION AGAINST MYCOBACTERIAL INFECTIONS AND METHODS OF USING THE SAME  
Provided herein is a multivalent Brucella vaccine expressing at least one heterologous M. tuberculosis antigen. The vaccines described herein serve as an environmentally safe bivalent vaccine for...
US20170239576 AUTOMATED PROGRAM SYNTHESIS FROM NATURAL LANGUAGE FOR DOMAIN SPECIFIC COMPUTING APPLICATIONS  
Disclosed are various embodiments for automated program synthesis from a natural language for domain specific computing applications. In one embodiment, a natural language processor may be...
9735238 Avoiding internal switching loss in soft switching cascode structure device  
In a cascode switching device, avalanche breakdown of a control transistor and loss of soft switching or zero voltage switching in a high voltage normally-on depletion mode transistor having a...
9732377 Microfluidic systems and methods for chromatin immunoprecipitation (ChIP)  
An integrated microfluidic chromatin immunoprecipitation assay dramatically improves the collection efficiency of ChIP DNA from cells. Immunoprecipitation of chromatin fragments is conducted in a...
US20170222483 OMNIDIRECTIONAL WIRELESS POWER TRANSFER SYSTEM  
In one example, an omnidirectional wireless power transfer system includes high frequency power generator configured to generate a supply of high frequency oscillating power, a number of...
US20170209620 IRREVERSIBLE ELECTROPORATION TO CREATE TISSUE SCAFFOLDS  
The present invention provides engineered tissue scaffolds, engineered tissues, and methods of using them. The scaffolds and tissues are derived from natural tissues and are created using...
9708415 Esters of cellulosic materials and diacids and method of making thereof  
The present invention relates to esters of diacids and cellulosic materials and methods for making thereof. The ester has the chemical composition of Formula (I) Formula I where R1, R2, and R3 can...
US20170197175 Energy-Efficient Extraction of Acid Gas From Flue Gases  
An energy-efficient method of removing carbon dioxide, hydrogen sulfide, and other acid gases from a stream of flue gases. The flue stream is contacted with a predetermined sorbent system to...
9705714 Wideband frequency shift modulation using transient state of antenna  
Described herein are architectures, platforms and methods for implementing modulating a radiating signal of a high Q antenna in order to transmit from one frequency to one or more different...
9705538 Wireless communication device using time-variant antenna module  
Embodiments of the present disclosure describe methods, apparatuses, and systems related to a wireless communication device using time-variant antenna. Other embodiments may be described and/or...
US20170189579 IRREVERSIBLE ELECTROPORATION TO CREATE TISSUE SCAFFOLDS  
The present invention provides engineered tissue scaffolds, engineered tissues, and methods of using them. The scaffolds and tissues are derived from natural tissues and are created using...
US20170179944 Power Switch Drivers with Equalizers for Paralleled Switches  
Capacitors connected between gate terminals of a plurality of parallel-connected power transistors are charged and discharged in each switching cycle to provide a plurality of power transistor...
US20170173143 LIVE ATTENUATED CHIMERIC PORCINE CIRCOVIRUS VACCINE  
The present invention provides a novel chimeric porcine circovirus infectious DNA clone and live attenuated chimeric virus with the PCV2, preferably of subtype PCV2b, capsid gene integrated into a...
9685790 Maximum power point tracking for solar panels  
Approximately one-half of the loss of delivered power from a solar panel having photovoltaic (PV) cells connected in series to form sub-panels due to shading is recovered at low hardware cost by...
9678521 External ramp autotuning for current mode control of switching converter  
Peak current, valley current or average current mode controlled power converters in either digital or analog implementations obtain a stabilized feedback loop and allow high system bandwidth...
US20170155045 Method to Manufacture Highly Conductive Vias and PROM Memory Cells by Application of Electric Pulses  
A memory device having a first array of first electrodes extending along a first direction made from a first material and a second array of second electrodes extending along a second direction...
9663835 Cellulose-solvent-based lignocellulose fractionation with modest reaction conditions and reagent cycling  
Embodiments of the present invention overcome the well-known recalcitrance of lignocellulosic biomass in an economically viable manner. A process and system are provided for the efficient...
US20170143236 SYSTEMS AND METHODS FOR OPTICALLY GUIDED PLACEMENT AND MONITORING OF MEDICAL IMPLANTS  
Described herein are systems and corresponding methods to place and further monitor an implanted medical device. The implanted device includes a fluorescent material that is disposed on a portion...
9660643 Method and apparatus to improve power device reliability  
Aspects of the disclosure provide a power device that includes an upper power module and a lower power module. The upper power module and the lower power module are coupled in series between two...
9645035 Imparting motion to a test object such as a motor vehicle in a controlled fashion with improved accuracy  
An apparatus imparts motion to a test object such as a motor vehicle in a controlled fashion. A base has mounted on it a linear electromagnetic motor having a first end and a second end, the first...
9642371 Compositions and methods comprising colletotrichum for controlling plant species  
Provided are methods and compositions for controlling at least one plant. Methods and compositions can comprise at least one strain of Colletotrichum spp., such as Colletotrichum fioriniae TR-123,...
US20170122286 Noise Reduction Surface Treatment for Airfoil  
The present invention relates to airfoils having surface treatments to reduce trailing edge noise. The surface treatment is designed to reduce trailing edge noise by modifying the boundary layer...
9634673 Anti-islanding detection for three-phase distributed generation  
Wobbling the operating frequency of a phase-locked loop (PLL), preferably by adding a periodic variation is feedback gain or delay in reference signal phase allows the avoidance of any...
US20170110880 NON-LINEAR DROOP CONTROL  
Aspects of non-linear droop control are described herein. In one embodiment, a system includes a first power converter or source configured to provide power to a bus, a second power converter or...
9624311 Regioselectively substituted cellulose esters and efficient methods of preparing them  
Embodiments of the invention provide regioselectively substituted carbohydrate and polysaccharide derivatives, such as cellulose esters, and methods for preparing them. Particular methods of the...
US20170101597 METHOD OF SEPARATING AND DE-WATERING FINE PARTICLES  
A process for cleaning and dewatering hydrophobic particulate materials is presented. The process is performed in in two steps: 1) agglomeration of the hydrophobic particles in a first hydrophobic...
9618555 System and method for impedance measurement using chirp signal injection  
A method for impedance measurement using chirp signal injection is provided. The method includes injecting at least one chirp signal into the three-phase AC system, and collecting at least one...
9610344 Live attenuated chimeric porcine circovirus vaccine  
The present invention provides a novel chimeric porcine circovirus infectious DNA clone and live attenuated chimeric virus with the PCV2, preferably of subtype PCV2b, capsid gene integrated into a...
US20170085280 WIRELESS COMMUNICATION DEVICE USING TIME-VARIANT ANTENNA MODULE  
Embodiments of the present disclosure describe methods, apparatuses, and systems related to a wireless communication device using time-variant antenna. Other embodiments may be described and/or...
US20170081477 POLYBENZIMIDAZOLES AND METHODS OF MAKING AND USING THEREOF  
Disclosed are polybenzimidazoles containing sulfonyl groups. The polymers can be synthesized in Eaton's reagent from 3,3′,4,4′-tetraaminodiphenylsulfone, which itself can be synthesized from...
9601997 V^2 power converter control with capacitor current ramp compensation  
Operation of a switching power converter having an output capacitor having a small equivalent series resistance (ESR) is stabilized and jitter reduced by sensing capacitor current with gain and...
9598691 Irreversible electroporation to create tissue scaffolds  
The present invention provides engineered tissue scaffolds, engineered tissues, and methods of using them. The scaffolds and tissues are derived from natural tissues and are created using...
9596571 Estimating the location of a wireless terminal based on radio-frequency pattern matching and cooperative measurements  
A method for estimating the location of a wireless terminal is disclosed that is based on using: the known location of one or more devices, empirical data that indicates the relative position of...
9589718 Method for reducing or eliminating conducted common mode noise in a transformer  
At least one shield member interposed between primary and secondary windings of a transformer and connected to the primary and/or secondary windings forms a distributed parasitic capacitance...
9585951 Live attenuated chimeric porcine circovirus vaccine  
The present invention provides a novel chimeric porcine circovirus infectious DNA clone and live attenuated chimeric virus with the PCV2, preferably of subtype PCV2b, capsid gene integrated into a...
9584116 Method and apparatus for current/power balancing  
Aspects of the disclosure provide a power circuit that includes a first switch circuit in parallel with a second switch circuit. The first switch circuit and the second switch circuit are coupled...
US20170054294 MODULAR MULTILEVEL CONVERTER CAPACITOR VOLTAGE RIPPLE REDUCTION  
Aspects of capacitor voltage ripple reduction in modular multilevel converters are described herein. In one embodiment, a power converter system includes a modular multilevel converter (MMC)...
US20170051027 Keratin Nanomaterials and Methods of Production  
The present disclosure relates to keratin nanomaterials, methods for obtaining keratin nanomaterials, and biomaterials made from keratin nanomaterials. In particular, keratin nanomaterials...