Now showing items 276-295 of 624

    • Harvesting Energy from the Counterbalancing (Weaving) Movement in Bicycle Riding 

      Yang, Yoonseok; Yeo, Jeongjin; Priya, Shashank (MDPI, 2012-07-30)
      Bicycles are known to be rich source of kinetic energy, some of which is available for harvesting during speedy and balanced maneuvers by the user. A conventional dynamo attached to the rim can generate a large amount of ...
    • Health, Spirituality and Environmental Concern: Older Women's Perspectives on the Natural Environment 

      Husser, E.; Gigliotti, C.; Roberto, Karen A. (Center for Gerontology and Dept. of Human Development, Virginia Polytechnic Institute and State University, 2007-11)
    • Helping a Friend/Helping Yourself: Intimate Partner Violence & Rural Older Women 

      Center for Gerontology (Virginia Tech. Center for Gerontology, 2010)
      Intimate Partner Violence (IPV) is physical, emotional, psychological, or sexual abuse by a husband, boyfriend or other intimate partner. IPV may include harsh or cruel criticism, threats of abandonment, intentional isolation ...
    • High efficiency planar-type perovskite solar cells with negligible hysteresis using EDTA-complexed SnO2 

      Yang, Dong; Yang, Ruixia; Wang, Kai; Wu, Congcong; Zhu, Xuejie; Feng, Jiangshan; Ren, Xiaodong; Fang, Guojia; Priya, Shashank; Liu, Shengzhong (Frank) (Springer Nature, 2018-08-13)
      Even though the mesoporous-type perovskite solar cell (PSC) is known for high efficiency, its planar-type counterpart exhibits lower efficiency and hysteretic response. Herein, we report success in suppressing hysteresis ...
    • High frequency integrated point-of-load power converter with embedded inductor substrate 

      Electrical and Computer Engineering; Center for Power Electronics Systems (CPES); Virginia Tech Intellectual Properties, Inc.; Li, Qiang; Lee, Fred C.; Su, Yipeng; Zhang, Wenli (United States Patent and Trademark Office, 2017-02-07)
      A low profile power converter structure is provide wherein volume is reduced and power density is increased to approach 1 KW/in3 by at least one of forming an inductor as a body of magnetic material embedded in a substrate ...
    • High thermal stability of piezoelectric properties in (Na0.5Bi0.5TiO3)(x)-(BaTiO3)(y)-(Na0.5K0.5NbO3)(1-x-y) ceramics 

      Gupta, Sanjay; Priya, Shashank (AIP Publishing, 2013-01-01)
      We report the piezoelectric and ferroelectric properties of (Na0.5Bi0.5TiO3)(x)-(BaTiO3)(y)-(Na0.5K0.5NbO3)(1-x-y) ceramics for Na0.5K0.5NbO3 rich end of composition (x, y <= 0.04 mol. %). These compositions were found to ...
    • High-Efficiency Skutterudite Modules at a Low Temperature Gradient 

      Li, Wenjie; Stokes, David; Poudel, Bed; Saparamadu, Udara; Nozariasbmarz, Amin; Kang, Han Byul; Priya, Shashank (MDPI, 2019-11-11)
      Thermoelectric skutterudite materials have been widely investigated for their potential application in mid-temperature waste heat recovery that has not been efficiently utilized A large amount of research has focused on ...
    • High-Extraction Mining, Subsidence, and Virginia’s Water Resources 

      Roth, Richard A.; Randolph, John; Zipper, Carl E. (Virginia Tech. Virginia Center for Coal and Energy Research., 1990-05)
      The Virginia Center for Coal and Energy Research was established in 1977 as an "interdisciplinary study, research, inrormation and resource facility for the Commonwealth. As a public service research organization, the ...
    • The Hockey Stick and the Climate Wars 

      Mann, Michael E. (2015-03-20)
      The Interfaces of Global Change Program at Virginia Tech is proud to host Dr. Michael Mann for a science communication workshop and public lecture on Friday, March 20, 2015. Dr. Mann is an award-winning climate scientist ...
    • Home and Community-Based Service Use by Vulnerable Older Adults 

      Weaver, Raven H.; Roberto, Karen A. (Virginia Tech, 2014-11-07)
      The purpose of this study was to identify distinct profiles of service users and determine whether certain service user profiles have greater potential to meet older adults’ care needs.
    • Homogeneous nanodiscs of native membranes formed by stilbene-maleic-acid copolymers 

      Esmaili, Mansoore; Brown, Chanelle J.; Shaykhutdinov, Rustem; Acevedo-Morantes, Claudia; Wang, Yong Liang; Wille, Holger; Gandour, Richard D.; Turner, S. Richard; Overduin, Michael (2020-08-28)
      Methylstilbene-alt-maleic acid copolymers spontaneously convert biological membranes into bilayer discs with similar to 20 nm diameters. This readily functionalizable class of copolymers has the compositional homogeneity, ...
    • House and garden in sunshine 

      Gottlieb, Lois Davidson (Virginia Tech. Digital Library and Archives; Virginia Tech. University Libraries. Special Collections Department, 2005-01-06)
    • House in snow 

      Gottlieb, Lois Davidson (Virginia Tech. Digital Library and Archives; Virginia Tech. University Libraries. Special Collections Department, 2005-01-06)
    • House in snow 

      Gottlieb, Lois Davidson (Virginia Tech. Digital Library and Archives; Virginia Tech. University Libraries. Special Collections Department, 2005-01-06)
    • House in wooded area 

      Gottlieb, Lois Davidson (Virginia Tech. Digital Library and Archives; Virginia Tech. University Libraries. Special Collections Department, 2005-01-06)
    • Hybrid interleaving structure with adaptive phase locked loop for variable frequency controlled switching converter 

      Electrical and Computer Engineering; Center for Power Electronics Systems (CPES); Virginia Tech Intellectual Properties, Inc.; Li, Qiang; Liu, Pei-Hsin; Lee, Fred C. (United States Patent and Trademark Office, 2018-07-03)
      In a multi-phase power converter using a phase-locked loop (PLL) arrangement for interleaving of pulse frequency modulated (PFM) pulses of the respective phases, improved transient response, improved stability of high ...
    • Iaverage current mode (ACM) control for switching power converters 

      Electrical and Computer Engineering; Center for Power Electronics Systems (CPES); Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Mattavelli, Paolo; Yan, Yingyi (United States Patent and Trademark Office, 2016-05-17)
      Providing a fast current sensor direct feedback path to a modulator for controlling switching of a switched power converter in addition to an integrating feedback path which monitors average current for control of a modulator ...
    • IAWA Archivist's Annual Report 2003-2004 

      Meehan, Jennifer (Archivist) (International Archive of Women in Architecture, 2004-08-27)
    • IAWA Archivist's Annual Report 2005 

      McMillan, Gail; Shaffer, Amy (International Archive of Women in Architecture, 2005-10-30)
    • IAWA Archivist's Report for 2000/2001 

      International Archive of Women in Architecture (International Archive of Women in Architecture, 2001)