Now showing items 7004-7023 of 18256

    • Hidden Stochastic Nature of a Single Bacterial Motor 

      Korobkova, Ekaterina A.; Emonet, Thierry; Park, Heungwon; Cluzel, Philippe (American Physical Society, 2006)
      The rotary flagellar motor of Escherichia coli bacterium switches stochastically between the clockwise (CW) and counterclockwise (CCW) direction. We found that the CW and CCW intervals could be described by a gamma ...
    • Hidden symmetry and magnetospectroscopy of quantum wells near filling factor v = 2 

      Rashba, Emmanuel; Sturge, M. D. (American Physical Society (APS), 2000)
      he magnetoluminescence spectra of symmetric quantum wells containing an electron gas show an abrupt changeover from Landau-level behavior (i.e., linear shift of energy with magnetic field) to quadratic (excitonlike) behavior ...
    • Hidden symmetry and the magnetically induced “Mott transition” in quantum wells containing an electron gas 

      Rashba, Emmanuel; Sturge, M.D.; Yoon, H.W.; Pfeiffer, L.N. (Elsevier BV, 2000)
      The magnetoluminescence spectra of symmetric quantum wells containing an electron gas show an abrupt transition from Landau level behavior (i.e. a linear shift of energy with field) to quadratic (exciton-like) behavior as ...
    • Hierarchical and Variational Geometric Modeling with Wavelets 

      Gortler, Steven; Cohen, Michael F. (Association for Computing Machinery, 1995)
      This paper discusses how wavelet techniques may be applied to a variety of geometric modeling tools. In particular, wavelet decompositions are shown to be useful for hierarchical control point or least squares editing. In ...
    • Hierarchical architecture influences calcium dynamics in engineered cardiac muscle 

      Pong, T.; Adams, William James; Bray, Mark-Anthony; Feinberg, Adam W.; Sheehy, Sean Paul; Werdich, Andreas A.; Parker, Kevin Kit (SAGE Publications, 2011)
      Changes in myocyte cell shape and tissue structure are concurrent with changes in electromechanical function in both the developing and diseased heart. While the anisotropic architecture of cardiac tissue is known to ...
    • Hierarchical Bayes Models with Many Instrumental Variables 

      Chamberlain, Gary; Imbens, Guido (National Bureau of Economic Research, 1996)
      In this paper, we explore Bayesian inference in models with many instrumental variables that are potentially weakly correlated with the endogenous regressor. The prior distribution has a hierarchical (nested) structure. ...
    • Hierarchical Bayesian Inference in the Visual Cortex 

      Lee, Tai Sing; Mumford, David Bryant (Optical Society of America, 2003)
      Traditional views of visual processing suggest that early visual neurons in areas V1 and V2 are static spatiotemporal filters that extract local features from a visual scene. The extracted information is then channeled ...
    • Hierarchical Encoding in Visual Working Memory 

      Brady, Timothy; Alvarez, George (SAGE Publications, 2011-02-04)
      Influential models of visual working memory treat each item to be stored as an independent unit and assume that there are no interactions between items. However, real-world displays have structure that provides higher-order ...
    • Hierarchical File Systems Are Dead 

      Seltzer, Margo I.; Murphy, Nicholas (USENIX Association, 2009)
      For over forty years, we have assumed hierarchical file system namespaces. These namespaces were a rudimentary attempt at simple organization. As users have begun to interact with increasing amounts of data and are ...
    • A hierarchical finite mixture model that accommodates zero-inflated counts, non-independence, and heterogeneity 

      Morgan, Charity J.; Lenzenweger, Mark F.; Rubin, Donald B.; Levy, Deborah L. (Wiley-Blackwell, 2014)
      A number of mixture modeling approaches assume both normality and independent observations. However, these two assumptions are at odds with the reality of many data sets, which are often characterized by an abundance of ...
    • Hierarchical honeycomb auxetic metamaterials 

      Mousanezhad, Davood; Babaee, Sahab; Ebrahimi, Hamid; Ghosh, Ranajay; Hamouda, Abdelmagid Salem; Bertoldi, Katia; Vaziri, Ashkan (Nature Publishing Group, 2015)
      Most conventional materials expand in transverse directions when they are compressed uniaxially resulting in the familiar positive Poisson’s ratio. Here we develop a new class of two dimensional (2D) metamaterials with ...
    • Hierarchical recruitment of Plk4 and regulation of centriole biogenesis by two centrosomal scaffolds, Cep192 and Cep152 

      Kim, Tae-Sung; Park, Jung-Eun; Shukla, Anil; Choi, Sunho; Murugan, Ravichandran N.; Lee, Jin H.; Ahn, Mija; Rhee, Kunsoo; Bang, Jeong K.; Kim, Bo Y.; Loncarek, Jadranka; Erikson, Raymond L.; Lee, Kyung S. (National Academy of Sciences, 2013)
      Centrosomes play an important role in various cellular processes, including spindle formation and chromosome segregation. They are composed of two orthogonally arranged centrioles, whose duplication occurs only once per ...
    • Hierarchical spacetime control 

      Liu, Zicheng; Gortler, Steven; Cohen, Michael F. (Association for Computing Machinery, 1994)
      Specifying the motion of an animated linked figure such that it achieves given tasks (e.g., throwing a ball into a basket) and performs the tasks in a realistic fashion (e.g., gracefully, and following physical laws such ...
    • Hierarchical Sparse Coding for Wireless Link Prediction in an Airborne Scenario 

      Tarsa, Stephen John; Kung, H. T. (IEEE, 2013)
      We build a data-driven hierarchical inference model to predict wireless link quality between a mobile unmanned aerial vehicle (UAV) and ground nodes. Clustering, sparse feature extraction, and non-linear pooling are combined ...
    • Hierarchical Structure of Magnetohydrodynamic Turbulence in Position-Position-Velocity Space 

      Burkhart, Blakesley; Lazarian, A.; Goodman, Alyssa; Rosolowsky, Erik (American Astronomical Society, 2013)
      Magnetohydrodynamic turbulence is able to create hierarchical structures in the interstellar medium (ISM) that are correlated on a wide range of scales via the energy cascade. We use hierarchical tree diagrams known as ...
    • Higgs criticality in a two-dimensional metal 

      Chowdhury, Debanjan; Sachdev, Subir (American Physical Society (APS), 2015)
      We analyze a candidate theory for the strange metal near optimal hole doping in the cuprate superconductors. The theory contains a quantum phase transition between metals with large and small Fermi surfaces of spinless ...
    • Higgs production at the large hadron collider: Phenomenological model and theoretical predictions 

      Gastmans, R.; Wu, Sau Lan; Wu, Tai Tsun (Elsevier BV, 2011)
      Using the results from relativistic gauge field theory, a phenomenological model is developed for the production of an isolated Higgs particle H. The specific process is p+p → A+H +B, where the group of particles A (B) ...
    • High concentrations of manganese and sulfur in deposits on Murray Ridge, Endeavour Crater, Mars 

      Arvidson, Raymond E.; Squyres, Steven W.; Morris, Richard V.; Knoll, Andrew Herbert; Gellert, Ralf; Clark, Benton C.; Catalano, Jeffrey G.; Jolliff, Brad L.; McLennan, Scott M.; Herkenhoff, Kenneth E.; VanBommel, Scott; Mittlefehldt, David W.; Grotzinger, John P.; Guinness, Edward A.; Johnson, Jeffrey R.; Bell, James F.; Farrand, William H.; Stein, Nathan; Fox, Valerie K.; Golombek, Matthew P.; Hinkle, Margaret A.G.; Calvin, Wendy M.; de Souza, Paulo A. (Mineralogical Society of America, 2016)
      Mars Reconnaissance Orbiter HiRISE images and Opportunity rover observations of the ~22 km wide Noachian age Endeavour Crater on Mars show that the rim and surrounding terrains were densely fractured during the impact ...
    • High density genetic mapping identifies new susceptibility loci for rheumatoid arthritis 

      Eyre, Steve; Bowes, John; Diogo, Dorothée; Lee, Annette; Barton, Anne; Martin, Paul; Zhernakova, Alexandra; Stahl, Eli; Viatte, Sebastien; McAllister, Kate; Amos, Christopher I.; Padyukov, Leonid; Toes, Rene E.M.; Huizinga, Tom W.J.; Wijmenga, Cisca; Trynka, Gosia; Franke, Lude; Westra, Harm-Jan; Alfredsson, Lars; Hu, Xinli; Sandor, Cynthia; de Bakker, Paul I.W.; Davila, Sonia; Khor, Chiea Chuen; Heng, Khai Koon; Andrews, Robert; Edkins, Sarah; Hunt, Sarah E; Langford, Cordelia; Symmons, Deborah; Concannon, Pat; Onengut-Gumuscu, Suna; Rich, Stephen S; Deloukas, Panos; Gonzalez-Gay, Miguel A.; Rodriguez-Rodriguez, Luis; Ärlsetig, Lisbeth; Martin, Javier; Rantapää-Dahlqvist, Solbritt; Plenge, Robert; Raychaudhuri, Soumya; Klareskog, Lars; Gregersen, Peter K; Worthington, Jane (2012)
      Summary Using the Immunochip custom single nucleotide polymorphism (SNP) array, designed for dense genotyping of 186 genome wide association study (GWAS) confirmed loci we analysed 11,475 rheumatoid arthritis cases of ...
    • High Depth, Whole-Genome Sequencing of Cholera Isolates from Haiti and the Dominican Republic 

      Sealfon, Rachel; Gire, Stephen; Ellis, Crystal Nicole; Calderwood, Stephen Beaven; Qadri, Firdausi; Hensley, Lisa; Kellis, Manolis; Ryan, Edward Thomas; Larocque, Regina Celes; Harris, Jason B.; Sabeti, Pardis Christine (BioMed Central, 2012)
      Background: Whole-genome sequencing is an important tool for understanding microbial evolution and identifying the emergence of functionally important variants over the course of epidemics. In October 2010, a severe cholera ...