Browsing Bradley Department of Electrical and Computer Engineering by Title

Now showing items 592-603 of 603

    • Wavelet Based ULF Pulsation Index for Studying Conjugate ULF Pulsation at High Latitudes and Its Applications to Space Weather 

      Xu, Zhonghua; Kim, H.; Clauer, C. Robert; Weimer, Daniel R.; Deshpande, K. (2016-12-14)
      A wavelet-based index is described in this study and applied to present geomagnetic Ultra Low Frequency (ULF) pulsations observed in Antarctica and their magnetically conjugate locations in West Greenland. The index is ...

    • Wearable Accelerometer and sEMG-Based Upper Limb BSN for Tele-Rehabilitation 

      Baraka, Ahmed; Shaban, Heba; Abou El-Nasr, Mohamad; Attallah, Omneya (MDPI, 2019-07-12)
      Assessment of human locomotion using wearable sensors is an efficient way of getting useful information about human health status, and determining human locomotion abnormalities. Wearable sensors do not only provide the ...

    • Whole Exome Sequencing to Identify Genetic Variants Associated with Raised Atherosclerotic Lesions in Young Persons 

      Hixson, James E.; Jun, Goo; Shimmin, Lawrence C.; Wang, Yizhi; Yu, Guoqiang; Mao, Chunhong; Warren, Andrew S.; Howard, Timothy D.; Vander Heide, Richard S.; Van Eyk, Jennifer; Wang, Yue; Herrington, David M. (Springer Nature, 2017-06-22)
      We investigated the influence of genetic variants on atherosclerosis using whole exome sequencing in cases and controls from the autopsy study "Pathobiological Determinants of Atherosclerosis in Youth (PDAY)". We identified ...

    • Wide scanning spherical antenna 

      Electrical and Computer Engineering; Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Shen, Bing W.; Stutzman, Warren L. (United States Patent and Trademark Office, 1995-10-17)
      A novel method for calculating the surface shapes for subreflectors in a suboptic assembly of a tri-reflector spherical antenna system is introduced, modeled from a generalization of Galindo-Israel's method of solving ...

    • Winds and tides in the mid-latitude Southern Hemisphere upper mesosphere recorded with the Falkland Islands SuperDARN radar 

      Hibbins, R. E.; Freeman, M. P.; Milan, S. E.; Ruohoniemi, J. Michael (Copernicus Publications, 2011)
      Meteor wind data from the first year of operation of the Falkland Islands SuperDARN radar (52 degrees S, 59 degrees W) are used to characterize the atmospheric tides and background winds in the upper mesosphere above the ...

    • Wireless communication device using time-variant antenna module 

      Electrical and Computer Engineering; Virginia Tech Intellectual Properties, Inc.; Intel Corporation; Suh, Seong-Youp; Kesling, W. Dawson; Manteghi, Majid; Salehi, Mohsen Amini; Skinner, Harry G. (United States Patent and Trademark Office, 2017-07-11)
      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.

    • Wireless communication device using time-variant antenna module 

      Electrical and Computer Engineering; Virginia Tech Intellectual Properties, Inc.; Intel Corporation; Suh, Seong-Youp; Kesling, W. Dawson; Manteghi, Majid; Salehi, Mohsen Amini; Skinner, Harry G. (United States Patent and Trademark Office, 2016-05-24)
      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.

    • Wireless communication device using time-variant antenna module 

      Electrical and Computer Engineering; Virginia Tech Intellectual Properties, Inc.; Intel Corporation; Suh, Seong-Youp; Kesling, W. Dawson; Manteghi, Majid; Salehi, Mohsen Amini; Skinner, Harry G. (United States Patent and Trademark Office, 2018-07-31)
      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.

    • X-ray and XPS studies of evaporated cuxs thin-films 

      Uppal, P. N.; Burton, Larry C. (American Institute of Physics, 1983-04-01)
      The structural changes in Cu x S films have been monitored by x_ray diffraction and correlated to the chemical changes taking place on the Cu x S surface, the latter monitored by XPS. The results show: evaporated Cu x S ...

    • X-Ray Phase-Contrast Imaging with Three 2D Gratings 

      Jiang, Ming; Wyatt, Christopher Lee; Wang, Ge (Hindawi, 2008-03-24)
      X-ray imaging is of paramount importance for clinical and preclinical imaging but it is fundamentally restricted by the attenuation-based contrast mechanism, which has remained essentially the same since Roentgen's discovery ...

    • Zero-current transition PWM converters 

      Electrical and Computer Engineering; Center for Power Electronics Systems (CPES); 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 ...

    • ZrO2 Thin-Film-Based Sapphire Fiber Temperature Sensor 

      Wang, Jiajun; Lally, Evan M.; Wang, Xiaoping; Gong, Jianmin; Pickrell, Gary R.; Wang, Anbo (Optical Society of America, 2012-10-01)
      A submicrometer-thick zirconium dioxide film was deposited on the tip of a polished C-plane sapphire fiber to fabricate a temperature sensor that can work to an extended temperature range. Zirconium dioxide was selected ...