Now showing items 1307-1326 of 1830

  • Physical model of the immune response of bacteria against bacteriophage through the adaptive CRISPR-Cas immune system 

    Han, Pu; Niestemski, Liang Ren; Barrick, Jeffrey E.; Deem, Michael W. (2013)
    Bacteria and archaea have evolved an adaptive, heritable immune system that recognizes and protects against viruses or plasmids. This system, known as the CRISPR-Cas system, allows the host to recognize and incorporate ...
  • The physics of eukaryotic chemotaxis 

    Levine, Herbert; Rappel, Wouter-Jan (2013)
    A small scratch on the skin can be quite painful. Fortunately, the pain is transitory and dissipates quickly once the wound heals. The healing process is facilitated by neutrophils, a type of white blood cell that removes ...
  • Pipelining Multiple SVDs On A Single Processor Array 

    Kota, Kishore; Cavallaro, Joseph R. (1994-07-20)
    We present a new family of architectures for processor arrays to implement Jacobi SVD which allow systolic loading and unloading of input and result matrices. Unlike most of the previous SVD arrays in the literature, our ...
  • Plasmon and compositional mapping of plasmonic nanostructures 

    Ringe, Emilie; Collins, Sean M.; DeSantis, Christopher J.; Skrabalak, Sara E.; Midgley, Paul A. (2014)
    Recently, co-reduction of Au and Pd has allowed the synthesis of complex Au core/AuPd shell nanoparticles with elongated tips and cubic-like symmetry. Optical studies have shown strong plasmonic behavior and high refractive ...
  • Plasmonic nanostructures on silicon 

    Sundararajan, Sri Priya (2008)
    The intersection of silicon technology with the rapidly growing field of nanoplasmonics, provides a fertile ground for development of synergistic technologies. The optical and electrical properties of silicon are well ...
  • Plasmonic Polymers Unraveled Through Single Particle Spectroscopy 

    Slaughter, Liane S.; Wang, Lin-Yung; Willingham, Britain A.; Olson, Jana M.; Swanglap, Pattanawit; Dominguez-Medina, Sergio; Link, Stephan (2014-08-13)
    Plasmonic polymers are quasi one-dimensional assemblies of nanoparticles whose optical responses are governed by near-field coupling of localized surface plasmons. Through single particle extinction spectroscopy correlated ...
  • Platelets for Multiscale Analysis in Medical Imaging 

    Willett, Rebecca; Nowak, Robert David (2002-04-20)
    This paper describes the development and use of multiscale, platelet-based image reconstruction algorithms in medical imaging. Such algorithms are effective because platelets approximate images in certain (piecewise) ...
  • Platelets for Multiscale Analysis in Photon-Limited Imaging 

    Willett, Rebecca; Nowak, Robert David (2002-09-20)
    This paper proposes a new multiscale image decomposition based on platelets. Platelets are localized functions at various scales, locations, and orientations that produce piecewise linear image approximations. For smoothness ...
  • Platelets: A Multiscale Approach for Recovering Edges and Surfaces in Photon-Limited Medical Imaging 

    Willett, Rebecca; Nowak, Robert David (2001-10-20)
    This paper proposes a new multiscale image decomposition based on platelets. Platelets are localized functions at various scales, locations, and orientations that produce piecewise linear image approximations. Platelets ...
  • Polynomial Root Finding 

    Lang, Markus; Frenzel, Bernhard-Christian (1994-10-01)
    Finding polynomial roots rapidly and accurately is an important problem in many areas of signal processing. We present a program which is superior in speed and accuracy to the best methods to our knowledge, i.e., Jenkins/Traub ...
  • Porous Bead-Based Diagnostic Platforms: Bridging the Gaps in Healthcare 

    Chou, Jie; Wong, Jorge; Christodoulides, Nicolaos; Floriano, Pierre N.; Sanchez, Ximena; McDevitt, John (2012-11-09)
    Advances in lab-on-a-chip systems have strong potential for multiplexed detection of a wide range of analytes with reduced sample and reagent volume; lower costs and shorter analysis times. The completion of high-fidelity ...
  • Post-Compensation of RF Non-Linearity in Mobile OFDM Systems by Estimation of Memory-less Polynomial 

    Guo, Yuanbin; Cavallaro, Joseph R. (2002-05-01)
    The high peak-to-average-power-ratio (PAPR) of OFDM systems introduces inevitable non-linear distortion in the transmitter and causes both in-band distortion and out-of-band spectrum re-growth. In this paper we propose a ...
  • Power efficient broadcast scheduling with delay deadlines 

    Rajan, Dinesh; Sabharwal, Ashutosh; Aazhang, Behnaam (2004-10-01)
    In this paper, we present a framework for the design of minimal power schedulers that satisfy average packet delay bounds for multiple users in a Gaussian wireless broadcast channel. We completely characterize the achievable ...
  • Power efficient transmission policies for multimedia traffic over wireless channels 

    Rajan, Dinesh (2002-04-20)
    The current and future wireless systems need to support a multitude of services with a wide range of data rates and reliability requirements. The limited battery resource at a mobile terminal coupled with the hostile ...
  • Power efficient transmission policies for multimedia traffic over wireless channels 

    Rajan, Dinesh (2002)
    The current and future wireless systems need to support a multitude of services with a wide range of data rates and reliability requirements. The limited battery resource at a mobile terminal coupled with the hostile ...
  • Power Issues in Communication Systems 

    Ahmed, Nasir (2002-04-20)
    In this work, we are concerned with power efficient communication techniques for wireless mobile devices. In this direction the effects of nonlinear amplifiers in communications systems are first studied, as they tend to ...
  • Power issues in communication systems 

    Ahmed, Nasir (2002)
    In this work, we are concerned with power efficient communication techniques for wireless mobile devices. In this direction the effects of nonlinear amplifiers in communications systems are first studied, as they tend to ...
  • Power Optimal Scheduling with Maximum Delay Constraints 

    Khojastepour, Mohammad; Sabharwal, Ashutosh (2003-10-01)
    Most multimedia sources are bursty in nature, a property which can be used to trade queuing delay with the resulting average transmission power [2, 3, 4]. In this paper, we study the relation between average transmission ...
  • Power optimization in multiple transmit antenna communication systems 

    Nallapureddy, Bhaskar Venkat-Vamsee (2004)
    We explore optimal ways of communicating (with a power constraint) over multiple antenna communication systems by managing spatial power distribution. We find that Mutual Coupling (MC), the interaction between antenna ...
  • Power-Efficient Non-coherent Space-Time Constellations 

    Borran, Mohammad Jaber; Sabharwal, Ashutosh; Aazhang, Behnaam (2003-07-20)
    We consider the problem of digital communication in a Rayleigh flat-fading environment using a multiple-antenna system, when the channel state information is available neither at the transmitter nor at the receiver. It ...