Now showing items 66777-66796 of 66817

    • Zafer Gurdal honored with emeritus status 

      Crumbley, Liz (Virginia Tech. University Relations, 2006-03-31)
      Zafer Gurdal, professor of engineering science and mechanics and of aerospace and ocean engineering in the College of Engineering at Virginia Tech, was granted the title "professor emeritus" by the Virginia Tech Board of ...
    • Zalich Receives Fulbright Scholarship To Study Nano-Sized Polymer-Magnetite Complexes 

      Harris, Sally L. (Virginia Tech. University Relations, 2003-04-23)
      New Particles For Possible Use In Localized Treatment Of Diseases
    • Zambia Conservation Agriculture Programme (CAP) - a brief update 

      Conservation Farming Unit (Conservation Farming Unit, 2010)
      This presentation compares conventional systems and conservation agriculture practices in Zambia. Because of continuous soil disturbance from ploughing with oxen, the top soil is often exposed, which contributes to poor ...
    • Zambia: Community Markets for Conservation (COMACO) 

      WCS (2007-12-13)
      In Zambia's Luangwa Valley, WCS is encouraging farmers to use wildlife-friendly practices through a rural development model called Community Markets for Conservation (COMACO). Although not a very direct incentive scheme ...
    • Zampanolide and Dactylolide: Cytotoxic Tubulin-Assembly Agents and Promising Anticancer Leads 

      Chen, Qiao-Hong; Kingston, David G. I. (The Royal Society of Chemistry, 2014-06-19)
      Zampanolide is a marine natural macrolide and a recent addition to the family of microtubule-stabilizing cytotoxic agents. Zampanolide exhibits unique effects on tubulin assembly and is more potent than paclitaxel against ...
    • Zebra GC: A Fully Integrated Micro Gas Chromatography System 

      Garg, Apoorva (Virginia Tech, 2014-08-29)
      A ready-to-deploy implementation of microfabricated gas chromatography (microGC) system characterized for detecting hazardous air pollutants (HAPs) at parts-per-billion (ppb) concentrations in complex mixtures has been ...
    • Zebra Mussels Pose a Threat to Virginia's Waters 

      Helfrich, Louis A. (Louis Anthony), 1942-; Weigmann, Diana L.; Speenburgh, Renee M.; Neves, Richard J.; Kitchel, Lisie; Bruenderman, Sue A., 1962- (Virginia Cooperative Extension, 2005-09-01)
      Provides an brief introduction to the invasion of the zebra mussel into American waters, explains the economic consequences they pose, and discusses if Virginia will inherit the problem, what the public can do to help, the ...
    • Zenobia L. Hikes named vice president for student affairs 

      Hincker, Lawrence (Virginia Tech. University Relations, 2005-06-22)
      Zenobia L. Hikes, vice president for student affairs and dean of students at Spelman College in Atlanta, Ga., has been named vice president for student affairs at Virginia Tech. She will begin her new position Sept. 1.
    • Zero Divisors and Linear Independence of Translates 

      Roman, Ahmed Hemdan (Virginia Tech, 2015-06-29)
      In this thesis we discuss linear dependence of translations which is intimately related to the zero divisor conjecture. We also discuss the square integrable representations of the generalized Wyle-Heisenberg group in $n^2$ ...
    • Zero Quantum Nuclear Magnetic Resonance experiments utilizing a toroid cell and coil 

      Bebout, William Roach (Virginia Tech, 1989-04-15)

      Over the past ten to fifteen years the area of Nuclear Magnetic Resonance (NMR) Spectroscopy has seen tremendous growth. For example, in conjunction with multiple quantum NMR, molecular structural mapping of a compound ...

    • Zero tillage development in tropical Brazil: The story of a successful NGO activity 

      Landers, J.N. (Wageningen, Netherlands: Wageningen University and Research Centre, 2001)
    • Zero voltage zero current three level DC-DC converter 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Canales-Abarca, Francisco; Barbosa, Peter M. (United States Patent and Trademark Office, 2002-02-19)
      A three-level DC-to-DC converter is provided having zero-voltage and zero-current switching (ZVZCS). A flying capacitor is provided on the primary side of the converter to achieve zero voltage switching (ZVS). In addition, ...
    • Zero-current transition PWM converters 

      Center for Innovative Technology; Intellectual Properties | Kft; Virginia Polytechnic Institute and State University; Lee, Fred C.; Hua, Guichao C. (United States Patent and Trademark Office, 1996-01-23)
      A zero-current transition pulse-width modulated (ZCT-PWM) d.c.-d.c. converter allows minority-carrier semiconductor devices such as, for example, bipolar junction transistors (BJTs), insulated gate bipolar transistors ...
    • Zero-pole interpolation of nonregular rational matrix functions 

      Rakowski, Marek (Virginia Polytechnic Institute and State University, 1989)
    • Zero-voltage switched resonant and PWM converters : design-oriented analysis and performance evaluation 

      Sabaté, Juan A. (Virginia Tech, 1994-04-26)
      The relative perfonnance evaluation of the different alternatives of bridge topologies with zero-voltage switching is presented. A design-oriented analysis is developed to optimize implementation of the converters in ...
    • Zero-voltage-switched multi-resonant converters including the buck and forward type 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Tabisz, Wojciech A. (United States Patent and Trademark Office, 1989-08-15)
      A multi-resonant-switching network that operates under switching conditions that are favorable to both the active switch and the diode that constitute the switch. In a zero-current multi-resonant switch, the resonant circuit ...
    • Zero-voltage-transition (ZVT) 3-phase PWM voltage link converters 

      Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Mao, Hengchun (United States Patent and Trademark Office, 1996-11-12)
      An improved zero voltage transition (ZVT) pulse width modulation (PWM) link converter is provided which introduces a space vector modulation scheme and an auxiliary circuit which includes a commutation power supply or ...
    • Zeta Beta Tau fraternity raises funds for the Children's Miracle Network 

      Dawson, Brandi (Virginia Tech. University Relations, 2007-10-04)
      The Delta Xi chapter of Zeta Beta Tau fraternity at Virginia Tech implemented a new program this summer to raise money for the Children's Miracle Network of Roanoke.
    • Zika Virus Persistently and Productively Infects Primary Adult Sensory Neurons In Vitro 

      Swartwout, Brianna K.; Zlotnick, Marta G.; Saver, Ashley E.; McKenna, Caroline M.; Bertke, Andrea S. (MDPI, 2017-10-13)
      Zika virus (ZIKV) has recently surged in human populations, causing an increase in congenital and Guillain-Barré syndromes. While sexual transmission and presence of ZIKV in urine, semen, vaginal secretions, and saliva ...
    • Zika Virus Persistently and Productively Infects Primary Adult Sensory Neurons In Vitro. 

      Swartwout, BK; Zlotnick, MG; Saver, AE; McKenna, CM; Bertke, AS (2017-10-13)
      Zika virus (ZIKV) has recently surged in human populations, causing an increase in congenital and Guillain-Barré syndromes. While sexual transmission and presence of ZIKV in urine, semen, vaginal secretions, and saliva ...