Now showing items 1683-1702 of 1777

  • A U.S. and Japanese Student Outlook on the Impact of International Research Internships 

    Matherly, C.A.; Phillips, S.R.; Yamada, M.; Brooks, E. (2012)
  • Ultra-sensitive tunable laser absorption spectroscopy: Applications and performance assessment 

    Roller, Chad B. (2005)
    Methodologies using tunable laser absorption spectroscopy (TLAS) for quantifying carbon dioxide stable isotopes (13/12CO 2), measuring atmospheric formaldehyde (CH2O), and analyzing exhaled carbonyl sulfide (COS) in human ...
  • Ultrafast and magneto-optical spectroscopy of excitons and phonons in carbon nanotubes 

    Booshehri, Layla Goli (2010)
    Understanding how electrons and phonons relax in energy and momentum is one of the current goals in carbon nanotube spectroscopy as well as an important step toward developing novel electronic and optoelectronic devices ...
  • Ultrafast magneto-optical spectroscopy of (III,manganese)V ferromagnetic semiconductors 

    Wang, Jigang (2005)
    This thesis describes magneto-optical processes in ferromagnetic (III,Mn)V semiconductors and their heterostructures induced by femtosecond laser pulses. Two-color ultrafast magneto-optical spectroscopy has been developed, ...
  • Ultrahigh Resolution Lithography with Excimer Lasers 

    Tittel, Frank K.; Erdelyi, Miklos; Sengupta, Chaitali; Bor, Zsolt; Szabo, Gabor; Cavallaro, Joseph R.; Smayling, Michael C.; Wilson, William L. (1995-07-01)
    The photolithography process is central to integrated circuit fabrication. Through this process an integrated circuit is patterned by imaging a photomask onto a layer of photoresist. The light source currently being used ...
  • Ultrasensitivity of the Bacillus subtilis sporulation decision 

    Narula, Jatin; Devi, Seram N.; Fujita, Masaya; Igoshin, Oleg A. (2012-11-19)
    Starving Bacillus subtilis cells execute a gene expression program resulting in the formation of stress-resistant spores. Sporulation master regulator, Spo0A, is activated by a phosphorelay and controls the expression ...
  • UNIFIED DECODER ARCHITECTURE FOR LDPC/TURBO CODES 

    Sun, Yang; Cavallaro, Joseph R. (2008-10-01)
    Low-density parity-check (LDPC) codes on par with convolutional turbo codes (CTC) are two of the most powerful error correction codes known to perform very close to the Shannon limit. However, their different code structures ...
  • Unitary Equivalence and Signal Processing 

    Baraniuk, Richard G.; Jones, Douglas L. (1993-08-01)
    The notions of time, frequency, and scale are generalized using concepts from unitary operator theory and eigenanalysis. The result is an infinite number of new signal analysis and processing tools that are implemented ...
  • Unitary Equivalence: A New Twist on Signal Processing 

    Baraniuk, Richard G.; Jones, Douglas L. (1995-10-01)
    Unitary similarity transformations furnish a powerful vehicle for generating infinite generic classes of signal analysis and processing tools based on concepts different from time, frequency, and scale. Implementation of ...
  • Universal ac conduction in large area atomic layers of CVD-grown MoS2 

    Ghosh, S.; Najmaei, S.; Kar, S.; Vajtai, R.; Lou, J.; Pradhan, N.R.; Balicas, L.; Ajayan, P.M.; Talapatra, S. (2014-03-19)
    Here, we report on the ac conductivity [σ’(ω); 10 mHz < ω < 0.1 MHz] measurements performed on atomically thin, two-dimensional layers of MoS2 grown by chemical vapor deposition (CVD). Σ’(ω) is observed to display a ...
  • Universal classification for wireless CDMA communications 

    Yue, Lin (1998)
    Since channel characteristics of a practical code division multiple access (CDMA) system are usually unknown and difficult to model accurately, we focus on the design of non-parametric adaptive receivers with two general ...
  • Universal Distributed Sensing via Random Projections 

    Wakin, Michael; Duarte, Marco F.; Baraniuk, Richard G.; Baron, Dror (2006-04-01)
    This paper develops a new framework for distributed coding and compression in sensor networks based on distributed compressed sensing (DCS). DCS exploits both intra-signal and inter-signal correlations through the concept ...
  • Unraveling the regulatory connections between two controllers of breast cancer cell fate 

    Lee, Jinho; Tiwari, Abhinav; Shum, Victor; Mills, Gordon B.; Mancini, Michael A.; Igoshin, Oleg A.; Balázsi, Gábor (2014)
    Estrogen receptor alpha (ERα) expression is critical for breast cancer classification, high ERα expression being associated with better prognosis. ERα levels strongly correlate with that of GATA binding protein 3 (GATA3), ...
  • Unsupervised SAR Image Segmentation using Recursive Partitioning 

    Baraniuk, Richard G. (2000-04-01)
    We present a new approach to SAR image segmentation based on a Poisson approximation to the SAR amplitude image. It has been established that SAR amplitude images are well approximated using Rayleigh distributions. We show ...
  • Untimed-C based SoC Architecture Design Space Exploration for 3G and Beyond Wireless Systems 

    Guo, Yuanbin; McCain, Dennis (2005-02-01)
    In this paper, we propose an un-timed C/C++ level verification methodology that integrates key technologies for truly high-level VLSI modelling to keep pace with the explosive complexity of SoC designs in the 3G and beyond ...
  • The Use of Fault Trees for the Design of Robots for Hazardous Environments 

    Walker, Ian D.; Cavallaro, Joseph R. (1996-01-01)
    This paper addresses the application of fault trees to the analysis of robot manipulator reliability and fault tolerance. Although a common and useful tool in other applications, fault trees have only recently been applied ...
  • Use of Myocardial Matrix in a Chitosan-Based Full-Thickness Heart Patch 

    Pok, Seokwon; Benavides, Omar M.; Hallal, Patrick; Jacot, Jeffrey G. (2014)
    A novel cardiac scaffold comprised of decellularized porcine heart matrix was investigated for use as a biodegradable patch with a potential for surgical reconstruction of the right ventricular outflow tract. Powdered heart ...
  • Useful Facts about the Kullback-Leibler Discrimination Distance 

    Lexa, Michael (2004-12-01)
    This report contains a list of some of the more prominent properties and theorems concerning the Kullback-Leibler (KL) discrimination distance. A brief discussion is also provided indicating the type of problems in which ...
  • User Cooperation Diversity--Part I: System Description 

    Sendonaris, Andrew; Erkip, Elza; Aazhang, Behnaam (2003-11-20)
    Mobile users' data rate and quality of service are limited by the fact that, within the duration of any given call, they experience severe variations in signal attenuation, thereby necessitating the use of some type of ...
  • User Cooperation Diversity--Part II: Implementation Aspects and Performance Analysis 

    Sendonaris, Andrew; Erkip, Elza; Aazhang, Behnaam (2003-11-20)
    This is the second in a two-part series of papers on a new form of spatial diversity, where diversity gains are achieved through the cooperation of mobile users. Part I described the user cooperation concept and proposed ...