Now showing items 416-435 of 518

    • Region-based progressive localization of cell nuclei in microscopic images with data adaptive modeling 

      Song, Yang; Cai, Weidong; Huang, Heng; Wang, Yue; Feng, David D.; Chen, Mei (2013-06-02)
      Background Segmenting cell nuclei in microscopic images has become one of the most important routines in modern biological applications. With the vast amount of data, automatic localization, i.e. detection and segmentation, ...
    • Reimagining Human Capacity For Location-Aware Aural Pattern Recognition: A Case For Immersive Exocentric Sonification 

      Bukvic, Ivica Ico; Earle, Gregory D. (Georgia Institute of Technology, 2018-06)
      The following paper presents a cross-disciplinary snapshot of 21st century research in sonification and leverages the review to identify a new immersive exocentric approach to studying human capacity to perceive spatial ...
    • Relationship between sawtooth events and magnetic storms 

      Cai, Xia; Zhang, J. C.; Clauer, C. R.; Liemohn, M. W. (American Geophysical Union, 2011-07-01)
      The relationship between sawtooth events and magnetospheric substorms has been discussed extensively. However, the relationship between sawtooth events and magnetic storms has not been systematically examined. Using the ...
    • Resiliency of Distribution Systems Incorporating Asynchronous Information for System Restoration 

      Bedyao, Juan C.; Xie, Jing; Wang, Yubo; Zhang, Xi; Liu, Chen-Ching (IEEE, 2019)
      Resiliency of distribution systems under extreme operating conditions is critical, especially when the utility is not available. With the large-scale deployment of distributed resources, it becomes possible to restore ...
    • Resistive volatile/non-volatile floating electrode logic/memory cell 

      Electrical and Computer Engineering; Virginia Tech Intellectual Properties, Inc.; Liu, Tong; Orlowski, Marius K.; Verma, Mohini; Kang, Yuhong (United States Patent and Trademark Office, 2017-10-17)
      A resistive floating electrode device (RFED) provides a logic cell or non-volatile storage or dynamic or static random access memory on an extremely compact matrix with individual cells scalable to the minimum available ...
    • Resolution-Dependent Depth Of Focus For an Incoherent Imaging-System 

      Pieper, Ronald J.; Park, Jinwoo; Poon, Ting-Chung (Optical Society of America, 1988-11-01)
      Through the application of the Rayleigh criterion for a two-point resolution, the dependence of the depth of focus on the resolution in the image is determined for a rectangular, a Gaussian, and an annular lens aperture. ...
    • Retinal-input-induced epigenetic dynamics in the developing mouse dorsal lateral geniculate nucleus 

      He, Jianlin; Xu, Xiguang; Monavarfeshani, Aboozar; Banerjee, Sharmi; Fox, Michael A.; Xie, Hehuang (2019-02-14)
      Abstract DNA methylation plays important roles in the regulation of nervous system development and in cellular responses to environmental stimuli such as light-derived signals. Despite great efforts in ...
    • Reverse convection potential saturation during northward IMF under various driving conditions 

      Wilder, F. D.; Clauer, C. R.; Baker, Joseph B. H. (American Geophysical Union, 2009-08-01)
      We report the results of an investigation of the reverse convection potentials in the dayside high-latitude ionosphere during periods of steady northward interplanetary magnetic field ( IMF). While it has been demonstrated ...
    • Reverse engineering module networks by PSO-RNN hybrid modeling 

      Zhang, Yuji; Xuan, Jianhua; de los Reyes, Benildo G.; Clarke, Robert; Ressom, Habtom W. (2009-07-07)
      Background Inferring a gene regulatory network (GRN) from high throughput biological data is often an under-determined problem and is a challenging task due to the following reasons: (1) thousands of genes are involved ...
    • Review of the accomplishments of mid-latitude Super Dual Auroral Radar Network (SuperDARN) HF radars 

      Nishitani, Nozomu; Ruohoniemi, John M.; Lester, Mark; Baker, Joseph B. H.; Koustov, Alexandre V.; Shepherd, Simon G.; Chisham, Gareth; Hori, Tomoaki; Thomas, Evan G.; Makarevich, Roman A.; Marchaudon, Aurélie; Ponomarenko, Pavlo; Wild, James A.; Milan, Stephen E.; Bristow, William A.; Devlin, John; Miller, Ethan; Greenwald, Raymond A.; Ogawa, Tadahiko; Kikuchi, Takashi (2019-03-18)
      The Super Dual Auroral Radar Network (SuperDARN) is a network of high-frequency (HF) radars located in the high- and mid-latitude regions of both hemispheres that is operated under international cooperation. The network ...
    • Riverine Autonomy 

      Stilwell, Daniel J. (Defense Technical Information Center, 2013-09-30)
      The principal goal of this project is to develop the technology and algorithms that will enable an unmanned surface vehicle (USV) to operate fast and autonomously in unknown riverine environments, including tropical rivers. ...
    • Role of InAs and GaAs terminated heterointerfaces at source/channel on the mixed As-Sb staggered gap tunnel field effect transistor structures grown by molecular beam epitaxy 

      Zhu, Yizheng; Jain, Nikhil; Vijayaraghavan, S.; Mohata, Dheeraj K.; Datta, Suman; Lubyshev, Dmitri; Fastenau, Joel M.; Liu, W. K.; Monsegue, Niven; Hudait, Mantu K. (American Institute of Physics, 2012-07-15)
      The structural, morphological, defect properties, and OFF state leakage current mechanism of mixed As-Sb type-II staggered gap GaAs-like and InAs-like interface heterostructure tunnel field effect transistors (TFETs) grown ...
    • Satellite Formation Flight Simulation Using Multi-Constellation GNSS and Applications to Ionospheric Remote Sensing 

      Peng, YuXiang; Scales, Wayne A. (MDPI, 2019-11-30)
      The Virginia Tech Formation Flying Testbed (VTFFTB) is a global navigation satellite system (GNSS)-based hardware-in-the-loop (HIL) simulation testbed for spacecraft formation flying with ionospheric remote sensing ...
    • Scalable Fabrication of Highly Flexible Porous Polymer-Based Capacitive Humidity Sensor Using Convergence Fiber Drawing 

      Tousi, Maryam Mesgarpour; Zhang, Yujing; Wan, Shaowei; Yu, Li; Hou, Chong; Yan, Ning; Fink, Yoel; Wang, Anbo; Jia, Xiaoting (MDPI, 2019-12-02)
      In this study, we fabricated a highly flexible fiber-based capacitive humidity sensor using a scalable convergence fiber drawing approach. The sensor’s sensing layer is made of porous polyetherimide (PEI) with its ...
    • Scalable nanolaminated SERS multiwell cell culture assay 

      Ren, Xiang; Nam, Wonil; Ghassemi, Parham; Strobl, Jeannine S.; Kim, Inyoung; Zhou, Wei; Agah, Masoud (Springer Nature, 2020)
      This paper presents a new cell culture platform enabling label-free surface-enhanced Raman spectroscopy (SERS) analysis of biological samples. The platform integrates a multilayered metal-insulator-metal nanolaminated SERS ...
    • Sectioning with edge extraction in optical incoherent imaging processing 

      Zhang, Yaping; Wang, Rende; Tsang, Peter; Poon, Ting-Chung (2020-04-15)
      Employing a single-pixel digital holographic recording technique called optical scanning holography (OSH), we accomplish the formidable task of sectioning with edge extraction in three-dimensional (3D) optical incoherent ...
    • Security and Privacy produced by nHCP Unique Identifiers 

      Tront, Joseph G.; Groat, Stephen; Dunlop, Matthew; Marchany, Randolph C. (IEEE, 2011-10)
      As protection against the current privacy weaknesses of StateLess Address AutoConfiguration (SLAAC) in the Internet Protocol version 6 (IPv6), network administrators may choose to deploy the new Dynamic Host Configuration ...
    • Semiconductor module arrangement 

      Electrical and Computer Engineering; Center for Power Electronics Systems (CPES); Virginia Tech Intellectual Properties, Inc.; DiMarino, Christina; Boroyevich, Dushan; Burgos, Rolando P.; Johnson, Mark (United States Patent and Trademark Office, 2018-07-24)
      In a switching module structure that includes a low-impedance path to ground, such as a parasitic capacitance of an insulating substrate, a further insulating substrate presenting a parasitic capacitance placed in series ...
    • Sensing and Autonomy for Riverine Vessels 

      Stilwell, Daniel J.; Woolsey, Craig A. (Defense Technical Information Center, 2012)
      The principal goal of this project is to develop the technology and algorithms that will enable an unmanned surface vehicle (USV) to operate fast and autonomously in unknown riverine environments, including tropical rivers. ...
    • Separation of Intrinsic and extrinsic Optical-Absorption in a Fluoride Glass 

      Jewell, J. M.; Williams, G. M.; Jaganathan, J.; Aggarwal, I. D.; Greason, P. (AIP Publishing, 1991-07-01)
      The contribution of impurity ions to the total optical absorption of a heavy metal fluoride glass has been determined at 532 and 1064 nm. Four ZrF4-BaF2-LaF3-AlF3-NaF glasses were prepared from various purity raw materials. ...