161,111 research outputs found
T. Gonzalez, O.M. Bulashenko, J. Mateos, D. Pardo, L. Reggiani and J.M. Rubi "Noise suppression due to long-range Coulomb interaction: crossover between diffusive and ballistic transport regimes", Semicond. Sci. Technol. {\bf 12}, 1053-1056 (1997).
No full textT. Gonzalez, O.M. Bulashenko, J. Mateos, D. Pardo, L. Reggiani and J.M. Rubi, "Shot-noise suppression in mesoscopic structures due to long-range Coulomb interaction" Proc 10th Int. Conf. on Nonequilibrium CarrierDynamics in Semiconductors, Berlin 1997, Phys. Stat. Sol. (b),{\bf 204}, 450-452 (1997).
No full textVariations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Effect of long-range Coulomb interaction on shot-noise suppression in ballistic transport
No full textWe present a microscopic analysis of shot-noise suppression due to long-range Coulomb interaction in semiconductor devices under ballistic transport conditions. An ensemble Monte Carlo simulator self-consistently coupled with a Poisson solver is used for the calculations. A wide range of injection-rate densities leading to different degrees of suppression is investigated. A sharp tendency of noise suppression at increasing injection densities is found to scale with a dimensionless Debye length related to the importance of space-charge effects in the structure
Effect of dimensionality on shot-noise suppressionin nondegenerate diffusive conductors'
No full textMicroscopic analysis of shot-noise suppression in nondegenerate diffusive conductors
No full textWe present a theoretical investigation of shot-noise suppression due to long-range Coulomb interaction in nondegenerate diffusive conductors. Calculations make use of an ensemble Monte Carlo simulator selfconsistently coupled with a one-dimensional ~1D! Poisson solver. We analyze the noise in a lightly doped active region surrounded by two contacts acting as thermal reservoirs. By taking the doping of the injecting contacts and the applied voltage as variable parameters, the influence of elastic and inelastic scattering in the active region is investigated. The transition from ballistic to diffusive transport regimes under different contact injecting statistics is analyzed and discussed. Provided significant space-charge effects take place inside the active region, long-range Coulomb interaction is found to play an essential role in suppressing the shot noise at qU@k BT. In the elastic diffusive regime, momentum space dimensionality is found to modify the suppression factor g, which within numerical uncertainty takes values respectively of about 1/3, 1/2, and 0.7 in the 3D, 2D, and 1D cases. In the inelastic diffusive regime, shot noise is suppressed to the thermal value
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Larry O. Spencer, Conference Author Presentation
No full textGen. Larry O. Spencer, USAF (Ret.), author of Dark Horse: A Journey from the Horseshoe to the Pentago
Electron-number statistics and shot-noise suppression by Coulomb correlation in nondegenerate ballistic transport
No full textWithin a Monte Carlo simulation, we investigate the statistical properties of an electron flow injected with a Poissonian distribution and transmitted under ballistic regime in the presence of long-range Coulomb interaction. Electrons are shown to exhibit a motional squeezing which tends to space them more regularly rather than strictly at random, and to evidence a sub-Poissonian statistics with a substantially reduced Fano factor Fn!1. The temporal ~anti!correlation among carriers is demonstrated to be a collective effect which persists over the transit of several successive electrons, and results in a considerable ~more than one order of magnitude! shot-noise suppression
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