Now showing items 400-419 of 588

    • Meeting Coal Production Demands in the USA: Upstream issues, challenges, and strategies 

      Gluskoter, Harold J.; Karmis, Michael E.; Luttrell, Gerald H.; Ramani, Raja V.; Vance, George F. (Virginia Tech. Virginia Center for Coal and Energy Research., 2008-12)
      The National Commission on Energy Policy (NCEP) commissioned this report to review and identify critical “upstream” fuel cycle issues that need to be addressed to ensure that the domestic coal industry can continue meeting ...
    • Menopausal Status, Climacteric Symptoms, and Family Related Variables in Korean Female Baby Boomers 

      Kim, Eunkyung; Lee, Kyung-Hae (Virginia Tech, 2012)
      In 2010, baby boomers (born between 1955 and 1963 in Korea) were 721 million and composed 14.6% of the total population in Korea. For the majority of women, the process of menopause occurs between ages 45 and 54. This means ...
    • Mesh independence of Kleinman-Newton iterations for Riccati equations in Hilbert space 

      Burns, J. A.; Sachs, E. W.; Zietsman, L. (Siam Publications, 2008)
      In this paper we consider the convergence of the infinite dimensional version of the Kleinman-Newton algorithm for solving the algebraic Riccati operator equation associated with the linear quadratic regulator problem in ...
    • Metal-ceramic laminate composite magnetoelectric gradiometer 

      Bedekar, V.; Bichurin, Mirza I.; Ivanov, S. N.; Pukinskiy, Yuri J.; Priya, Shashank (AIP Publishing, 2010-03-01)
      Gradiometer resembles in functionality a magnetic field sensor where it measures the magnetic field gradient and its sensitivity is determined by the ability to quantify differential voltage change with respect to a reference ...
    • Method and apparatus for current/power balancing 

      Electrical and Computer Engineering; Center for Power Electronics Systems (CPES); 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, 2017-02-28)
      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 to a first driving node, ...
    • Method and apparatus for current/power balancing 

      Electrical and Computer Engineering; Center for Power Electronics Systems (CPES); 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, 2018-03-20)
      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 a second transistor. ...
    • Method and apparatus for driving a power device 

      Electrical and Computer Engineering; Center for Power Electronics Systems (CPES); Virginia Tech Intellectual Properties, Inc.; Toyota Motor Engineering & Manufacturing North American, Inc.; Wang, Chi-Ming; Shin, Jongwon; Ngo, Khai D. (United States Patent and Trademark Office, 2016-12-27)
      Aspects of the disclosure provide a circuit for driving a power switch. The circuit includes a first circuit configured to provide a charging current to charge a control terminal of the power switch, a second circuit ...
    • Method and apparatus to improve power device reliability 

      Electrical and Computer Engineering; Center for Power Electronics Systems (CPES); 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, 2017-05-23)
      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 supply voltages, and are ...
    • Method for reducing or eliminating conducted common mode noise in a transformer 

      Electrical and Computer Engineering; Center for Power Electronics Systems (CPES); Virginia Tech Intellectual Properties, Inc.; Li, Qiang; Lee, Fred C.; Huang, Daocheng; Yang, Yuchen (United States Patent and Trademark Office, 2017-03-07)
      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 between the shield member and ...
    • Methodology for assessing the biomechanical performance of helmets 

      Virginia Tech Intellectual Properties, Inc.; Duma, Stefan M.; Rowson, Steven; McNally, Craig (United States Patent and Trademark Office, 2017-10-24)
      The present invention provides a method for testing a helmet that uses a risk function that incorporates both linear and rotational acceleration to predict the helmet's ability to prevent a concussion. In certain embodiments, ...
    • Micrometer-scale Experimental Characterization of the Lower Huron Shale in the Central Appalachian Basin 

      Tan, Xinyu; Gilliland, Ellen; Tang, Xu; Fan, Ming; Ripepi, Nino (American Geophysical Union, 2020)
      The mechanical properties of shale play an important role in hydraulic fracturing design. Although the popular nanoindentation method can be performed to evaluate some mechanical characteristics of organic matter, it is ...
    • MII Technical Conference & Review 2018 : From Molecules to Manufacturing 

      Macromolecules Innovation Institute (Virginia Tech, 2018-04-11)
      "From Molecules to Manufacturing" is the 2018 Technical Conference & Review of the Macromolecules Innovation Institute at Virginia Tech. The abstract book contains a schedule of events and abstracts from poster sessions ...
    • Mild Cognitive Impairment (MCI): What do we do now? 

      Center for Gerontology (Virginia Tech. Center for Gerontology, 2006-10)
      This brochure provides information about mild cognitive impairment, including how to recognize the condition, seek medical help, and coping strategies for patients and families.
    • Mitigation of bidirectional solute flux in forward osmosis via membrane surface coating of zwitterion functionalized carbon nanotubes 

      Zou, Shiqiang; Smith, Ethan D.; Lin, Shihong; Martin, Stephen M.; He, Zhen (Elsevier, 2019-07-08)
      Forward osmosis (FO) has emerged as a promising membrane technology to yield high-quality reusable water from various water sources. A key challenge to be solved is the bidirectional solute flux (BSF), including reverse ...
    • Model Reduction for DAEs with an Application to Flow Control 

      Borggaard, Jeffrey T.; Gugercin, Serkan (Springer-Verlag Berlin, 2015-01-01)
    • Modeling for controlled oral drug delivery 

      Achenie, Luke E. K. (2012-10-12)
      Presented by Luke Achenie at the Center for Autism Research Conference. Describes research in drug release profiles for oral medications, and suggests developing a complete pharmacokinetic model. Achenie requests collaborators ...
    • Modeling Temperature Effects on Population Density of the Dengue Mosquito Aedes aegypti 

      El Moustaid, Fadoua; Johnson, Leah R. (MDPI, 2019-11-07)
      Mosquito density plays an important role in the spread of mosquito-borne diseases such as dengue and Zika. While it remains very challenging to estimate the density of mosquitoes, modelers have tried different methods to ...
    • Mountain Voices: The Socio-Cultural Ramifications of Declines in Coal Mining Employment and Production in the Southwestern Virginia Coalfields 

      Mooney, Stephen D. (Virginia Tech. Virginia Center for Coal and Energy Research., 1998-08)
      The following study, Mountain Voices, was funded by the Virginia Center for Coal and Energy Research. Its purpose is to allow the people of the southwestern Virginia coalfields—miners and managers, citizens and industry ...
    • A Multi-resolution Design Methodology Based on Discrete Models 

      Ladron de Guevara, M.; Borunda, L.; Krishnamurti, R. (Springer Singapore, 2019-01-01)
      The use of programming languages in design opens up unexplored and previously unworkable territories, mainly, in conventional architectural practice. In the 1990s, languages of continuity, smoothness and seamlessness ...
    • Multi-step simplified optimal trajectory control (SOTC) based on only Vo and I load 

      Electrical and Computer Engineering; Center for Power Electronics Systems (CPES); Virginia Tech Intellectual Properties, Inc.; Li, Qiang; Lee, Fred C.; Fei, Chao; Feng, Weiyi (United States Patent and Trademark Office, 2018-09-11)
      A resonant power converter is disclosed with a driving circuit generating a switching signal connecting power to a resonant tank circuit, with a voltage monitoring circuit measuring a voltage output and a load current. A ...