Now showing items 41-60 of 491

    • In-state Economic Impacts of the Virginia Coal Industry and Potential Coal Production Declines 

      Zipper, Carl (Virginia Tech. Virginia Center for Coal and Energy Research., 1995-05)
      Production and transportation of coal make a significant contribution to the Virginia economy. Several recent reports, however, indicate that Virginia coal production appears vulnerable to substantial decline in the near ...
    • An Analysis of Household Water Supply Impacts by Underground Coal Mining in Virginia 

      Zipper, Carl; Balfour, William; Randolph, John; Roth, Richard (Virginia Tech. Virginia Center for Coal and Energy Research., 1994-05)
      Underground coal mining can affect wells and springs used as water supplies. Subsidence caused by underground mining is generally acknowledged to be a primary cause of groundwater resource effects. In coal producing regions ...
    • Prospects for Coalbed Methane Development in Virginia 

      Randolph, John; Balasubrahmanyam, Sunil (Virginia Tech. Virginia Center for Coal and Energy Research., 1990-03-15)
      This report reviews the prospects for commercial development of coalbed methane in Virginia. The first section summarizes recent studies on resource potential. The second describes production technologies and marketing ...
    • CPES Annual Report 2019 

      Unknown author (Virginia Tech. Center for Power Electronics Systems, 2019)
      In its effort to develop power processing systems to take electricity to the next step, CPES has cultivated research expertise encompassing five technology areas: (1) power conversion technologies and architectures; (2) ...
    • Low-cost sensor-integrated 3D-printed personalized prosthetic hands for children with amniotic band syndrome: A case study in sensing pressure distribution on an anatomical human-machine interface (AHMI) using 3D-printed conformal electrode arrays 

      Tong, Yuxin; Kucukdeger, Ezgi; Halper, Justin; Cesewski, Ellen; Karakozoff, Elena; Haring, Alexander P.; McIlvain, David; Singh, Manjot; Khandelwal, Nikita; Meholic, Alex; Laheri, Sahil; Sharma, Akshay; Johnson, Blake N. (PLOS, 2019)
      Interfacing anatomically conformal electronic components, such as sensors, with biology is central to the creation of next-generation wearable systems for health care and human augmentation applications. Thus, there is a ...
    • IAWA Archivist’s Report, 2018 

      Purcell, Aaron D. (Virginia Tech, 2018)
      The IAWA was established in 1985 as a collaborative project between the College of Architecture and Urban Studies and the University Libraries at Virginia Tech. It is overseen by a board of advisors that includes architects, ...
    • IAWA Archivist’s Report, FY 2012-2013 

      Purcell, Aaron D. (Virginia Tech, 2013)
      The IAWA was established in 1985 as a collaborative project between the College of Architecture and Urban Studies and the University Libraries at Virginia Tech. It is overseen by a board of advisors that includes architects, ...
    • Structural Resemblance Between Droop Controllers and Phase-Locked Loops 

      Zhong, Qing-Chang; Boroyevich, Dushan (IEEE, 2016)
      It is well known that droop control is fundamental to the operation of power systems and now the parallel operation of inverters, while phase-locked loops (PLLs) are widely adopted in modern electrical engineering. In this ...
    • Specific Emitter Identification Using Convolutional Neural Network-Based IQ Imbalance Estimators 

      Wong, Lauren J.; Headley, William Christopher; Michaels, Alan J. (IEEE, 2019)
      Specific Emitter Identification is the association of a received signal to a unique emitter, and is made possible by the naturally occurring and unintentional characteristics an emitter imparts onto each transmission, known ...
    • IAWA Symposium 2019: Session 3 

      Bala, Alexander; Robinson, Claire; Roff, Shelley E.; Marti Maties, Miquel; Laboy, Michelle (Virginia Tech. University Libraries, 2019-03-22)
      Session 3 of the 2019 IAWA Symposium includes the following presentations: The Loom of Early Modernism in “Nowe Tychy” (Alexander Bala); Edith Ouzts Humphreys’ influence on American college union architecture (Claire ...
    • IAWA Symposium 2019 Program 

      IAWA (Virginia Tech, 2019-03-21)
      The program for the 2019 Symposium of the International Archive of Women in Architecture (IAWA).
    • IAWA Symposium 2019: Session 2 

      Winn, Samantha R.; Willkens, Danielle S.; Doyle, Shelby (Virginia Tech. University Libraries, 2019-03-21)
      Session 2 of the 2019 IAWA Symposium includes the following presentations: Archivists at work: Archival labor in the IAWA (Samantha Winn) Maria Hadfield Cosway’s Transatlantic Design Network, 1768-1838: Jefferson, ...
    • IAWA Symposium 2019 Keynote: The Practical Nature of Utopian Visions 

      Chestnutt, Rebecca E. (Virginia Tech. University Libraries, 2019-03-20)
      Considering that architecture and the urban fabric are the built expression of a society, they reflect its character and structure. When a utopian vision is formulated it is in search of a “better place”. Literally: no-where? ...
    • IAWA Symposium 2019: Session 1 

      Frey, Katia; Perotti, Eliana; Sokolina, Anna P.; Hunting, Mary Anne; Murphy, Kevin D. (Virginia Tech. University Libraries, 2019-03-21)
      Session 1 of the 2019 IAWA Symposium includes the following presentations: The Architect Flora Ruchat-Roncati, First Female Professor at ETH Zurich. Breaking New Ground in Practice and Teaching (Katia Frey and Eliana ...
    • Global Change Lecture Series: How Culture Shapes the Climate Change Debate 

      Hoffman, Andrew (Virginia Tech. University Libraries, 2019-03-22)
      Andrew Hoffman, the Holcim Professor of Sustainable Enterprise for University of Michigan and author, visited Virginia Tech on Friday, March 22, as part of The Global Change Center at Virginia Tech’s Distinguished Lecture ...
    • Collaborative efforts to forecast seasonal influenza in the United States, 2015–2016 

      McGowan, C.J.; Biggerstaff, M.; Johansson, M.; Apfeldorf, K.M.; Ben-Nun, M.; Brooks, L.; Convertino, M.; Erraguntla, M.; Farrow, D.C.; Freeze, J.; Ghosh, S.; Hyun, S.; Kandula, S.; Lega, J.; Liu, Y.; Michaud, N.; Morita, H.; Niemi, J.; Ramakrishnan, N.; Ray, E.L.; Reich, N.G.; Riley, P.; Shaman, J.; Tibshirani, R.; Vespignani, A.; Zhang, Q.; Reed, C.; Rosenfeld, R.; Ulloa, N.; Will, K.; Turtle, J.; Bacon, D.; Riley, S.; Yang, W.; The Influenza Forecasting Working Group (Nature Publishing Group, 2019-01-24)
      Since 2013, the Centers for Disease Control and Prevention (CDC) has hosted an annual influenza season forecasting challenge. The 2015–2016 challenge consisted of weekly probabilistic forecasts of multiple targets, including ...
    • Double helical conformation and extreme rigidity in a rodlike polyelectrolyte 

      Wang, Y.; He, Y.; Yu, Z.; Gao, J.; ten, Brinck S.; Slebodnick, C.; Fahs, G.B.; Zanelotti, C.J.; Hegde, M.; Moore, R.B.; Ensing, B.; Dingemans, T.J.; Qiao, R.; Madsen, L.A. (Nature Publishing Group, 2019-02-18)
      The ubiquitous biomacromolecule DNA has an axial rigidity persistence length of ~50 nm, driven by its elegant double helical structure. While double and multiple helix structures appear widely in nature, only rarely are ...
    • Proceedings: 11th Annual Conference on Higher Education Pedagogy/Symposium on Teaching Large Classes 

      Unknown author (Virginia Tech, 2019)
      Combined proceedings from the 11th annual Conference on Higher Education Pedagogy, held on January 30-February 1, 2019; and the Symposium on Teaching Large Classes, held on February 2, 2019.
    • Two-stage multichannel LED driver with CLL resonant circuit 

      Virginia Tech Intellectual Properties, Inc.; Li, Qiang; Lee, Fred C.; Chen, Xuebing; Huang, Daocheng (United States Patent and Trademark Office, 2017-01-10)
      In a two-stage power converter providing voltage regulation in a first stage, zero voltage switching (ZVS) is provided in switches in an unregulated, constant frequency second stage of a two-stage power converter by an ...
    • Parallel devices having balanced switching current and power 

      Virginia Tech Intellectual Properties, Inc.; Toyota Motor Engineering & Manufacturing North American, Inc.; Wang, Chi-Ming; Mao, Yincan; Miao, Zichen; Ngo, Khai D. (United States Patent and Trademark Office, 2018-10-30)
      A power circuit includes a power source for providing electrical power and two driving transistors being disposed in parallel and receiving electrical power from the power source. Each of the two driving transistors includes ...