Blacksburg, VA, United States

Virginia Polytechnic Institute and State University, popularly known as Virginia Tech, is a public land-grant university with a main campus in Blacksburg, Virginia, educational facilities in six regions statewide, and a study-abroad site in Switzerland. The commonwealth's third-largest university and a leading research institution, Virginia Tech offers 225 undergraduate and graduate degree programs to some 31,000 students and manages a research portfolio of $454 million. The university fulfills its land-grant mission of transforming knowledge to practice through technological leadership and by fueling economic growth and job creation locally, regionally, and across Virginia.The Virginia Tech Board of Visitors serves as the university's governing body. The board comprises 13 members who are appointed by the governor of Virginia. Serving as ex-officio, non-voting representatives are the president of the state Board of Agriculture and Consumer Services; the presidents of the university's faculty senate and staff senate; and an undergraduate student and a graduate student selected through a competitive review process. Wikipedia.

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The University Of Texas System, Virginia Polytechnic Institute and State University | Date: 2016-09-19

Disclosed are polybenzimidazoles containing sulfonyl groups. The polymers can be synthesized in Eatons reagent from 3,3,4,4-tetraaminodiphenylsulfone, which itself can be synthesized from 4,4-dichlorodiphenylsulfone. Methods of synthesizing the polymers are disclosed. The disclosed polymers can be used for high temperature H_(2)/CO_(2 )separation membranes and other uses.

Virginia Polytechnic Institute and State University | Date: 2015-05-01

The present disclosure relates to keratin nanomaterials, methods for obtaining keratin nanomaterials, and biomaterials made from keratin nanomaterials. In particular, keratin nanomaterials comprising Type I and Type II monomer pairs are disclosed as well as a method for obtaining keratin nanomaterials comprising obtaining a solution of keratin and processing the solution by ultrafiltration with buffer solution containing phosphate.

Virginia Polytechnic Institute and State University | Date: 2015-04-23

A system and method for monitoring the health of dialysis patients with Raman spectroscopy measurements of one or more target analytes is described. The methods include irradiating one or more fluids of interest with light to produce one or more spectrum and detecting the spectrum with a detector. The fluids of interest are preferably those related to dialysis, including hemodialysis and peritoneal dialysis. In a preferred embodiment, the fluids are irradiated with monochromatic light, and one or more Raman spectra are detected as a result of the irradiation. The fluids may be irradiated within the dialysis tubing itself, or removed from the dialysis tubing and irradiated in a separate chamber. The Raman spectra of one or more target analytes of a dialysis patient may be followed over time or compared to one or more reference spectra, thereby providing information on the health of dialysis patients.

Virginia Polytechnic Institute and State University | Date: 2016-08-17

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) electrically coupled and configured to convert power between two different power systems. The MMC includes one or more phase legs having a cascade arrangement of switching submodules, where the switching submodules include an arrangement of switching power transistors and capacitors. The MMC further includes a control loop including a differential mode control loop and a common mode control loop. The differential control loop is configured to generate a differential control signal based on a target modulation index to reduce fundamental components of voltage ripple on the capacitors, and the common mode control loop is configured to inject 2^(nd )order harmonic current into a common mode control signal to reduce 2^(nd )order harmonic components of the voltage ripple on the capacitors.

Intel Corporation, Virginia Polytechnic Institute and State University | Date: 2016-11-02

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 claimed.

Intel Corporation, Virginia Polytechnic Institute and State University | Date: 2016-08-12

A plug-and-play antenna may be used with many different types of wireless communication devices. An antenna may be coupled to an impedance tuning component and a waveform generator. A calibration control module receives radio status information, controls the waveform generator to vary a response of the antenna, and tunes the impedance tuning component to match impedances between a radio and the antenna.

Intel Corporation, Virginia Polytechnic Institute and State University | Date: 2017-04-05

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 claimed.

Meng X.-J.,Virginia Polytechnic Institute and State University
Seminars in Liver Disease | Year: 2013

Hepatitis E is an important disease in many developing countries of Asia and Africa with large explosive outbreaks and is also endemic with sporadic or cluster cases of hepatitis in many industrialized countries. The causative agent, hepatitis E virus (HEV), is currently classified in the family Hepeviridae. Thus far, four putative genera of HEV representing mammalian, avian, and fish species have been identified and characterized worldwide. Within the mammalian HEV that infects humans, genotypes 1 and 2 are associated with epidemics and restricted to humans, whereas genotypes 3 and 4 are zoonotic and associated with sporadic and cluster cases of hepatitis E. As a fecal-orally transmitted disease, waterborne transmission is still an important route of HEV transmission especially for large outbreaks associated with genotypes 1 and 2. However, genetic identification of numerous animal strains of HEV and the demonstrated ability of cross-species infection by these animal strains have significantly broadened the host range and diversity of HEV and raised public health concerns for zoonosis and food safety associated with genotypes 3 and 4 HEV infection. Pigs and likely other animal species serve as reservoirs for HEV. Direct contact with infected pigs and other animals and consumption of contaminated animal meat and meat products pose risks for HEV infection. In this article, the current understanding of the zoonotic and foodborne transmissions of HEV as well as strategies to prevent zoonosis and ensure food safety is discussed. Copyright © 2013 by Thieme Medical Publishers, Inc.

Huber P.,Virginia Polytechnic Institute and State University
Physical Review C - Nuclear Physics | Year: 2011

In this paper we study the effect of well-known higher-order corrections to the allowed β-decay spectrum on the determination of antineutrino spectra resulting from the decays of fission fragments. In particular, we try to estimate the associated theory errors and find that induced currents like weak magnetism may ultimately limit our ability to improve the current accuracy and under certain circumstance could even greatly increase the theoretical errors. We also perform a critical evaluation of the errors associated with our method to extract the antineutrino spectrum using synthetic β spectra. It turns out that a fit using only virtual β branches with a judicious choice of the effective nuclear charge provides results with a minimal bias. We apply this method to actual data for 235U, 239Pu, and 241Pu and confirm, within errors, recent results, which indicate a net 3% upward shift in energy-averaged antineutrino fluxes. However, we also find significant shape differences which can, in principle, be tested by high-statistics antineutrino data samples. © 2011 American Physical Society.

Agency: NSF | Branch: Standard Grant | Program: | Phase: CRISP - Critical Resilient Int | Award Amount: 876.91K | Year: 2017

This project will develop an approach for coordinated restoration of infrastructure services following disruptive events in interdependent power and transportation systems. This approach accommodates behavior adaptation in the recovery of physical aspects of infrastructure. This adaptation is not well understood or integrated with current restoration plans. By better understanding adaptive behaviors and their dependence on different infrastructures and coordinating recovery across these infrastructures, such a framework can help households return to productive activities faster. For instance, if employees cannot commute, they may work remotely if power is available. This approach to infrastructure restoration has the potential to substantially improve the efficiency of post-disaster return to productive daily life. If infrastructure recovery is coordinated and focuses on actual needs, restoration also may be more cost effective. To help realize these benefits, the projects team of civil engineers, social scientists, and computer scientists will convey research results through practitioner-oriented seminars held with FEMA, state emergency management agencies, transportation authorities, and electric power utilities. The multi-disciplinary approach and outreach activities developed for Virginia Techs Center for the Enhancement of Engineering Diversity and the University of Michigans Detroit-Area Pre-College Engineering Program will help broaden the research participation of underrepresented groups and attract new students to the respective fields.

Technically, the projects objectives include: developing improved methods for collecting, analyzing, and archiving tweets and webpages - integrated with data collected from official or specialized sources - in support of understanding the interplay of behavior and power and transportation infrastructures in disruptions; collecting novel data with activity diaries that incorporate adaptation and use of technologies; determining how the nature of information about infrastructure disruptions and the way in which individuals process this information shape responses to disruptions and preferred tradeoffs; identifying how these behavior adaptations induce or magnify substitutive interdependencies between transportation and power systems; and developing recovery strategies that coordinate among the infrastructures and account for adaptation. To achieve these objectives, the study will use social media, official utility and transport information, and activity panel surveys to develop behavioral and infrastructure outage models that feed a coordinated, behaviorally-aware power and transport recovery model using optimization and agent based modeling. The project teams approach specifically examines the adaptation of individuals who pursue alternate means to accomplish an activity goal and the interdependence between power and transportation infrastructure that results from this adaptation during disruptions. This approach is applied to a case study in a metropolitan area.

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