499 resultados para Intersections.


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Federal Highway Administration, Washington, D.C.

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Federal Highway Administration, Office of Safety and Traffic Operations Research and Development, McLean, Va.

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livre I. Définitions, lecture, notations.--livre II. Problèmes de position relative du point, de la droite et du plan.-livre III. Intersections des lignes et des surfaces.

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Thesis (Ph.D.)--University of Washington, 2016-06

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Thesis (Ph.D.)--University of Washington, 2016-06

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Thesis (Ph.D.)--University of Washington, 2016-06

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The non-linear motions of a gyrostat with an axisymmetrical, fluid-filled cavity are investigated. The cavity is considered to be completely filled with an ideal incompressible liquid performing uniform rotational motion. Helmholtz theorem, Euler's angular momentum theorem and Poisson equations are used to develop the disturbed Hamiltonian equations of the motions of the liquid-filled gyrostat subjected to small perturbing moments. The equations are established in terms of a set of canonical variables comprised of Euler angles and the conjugate angular momenta in order to facilitate the application of the Melnikov-Holmes-Marsden (MHM) method to investigate homoclinic/heteroclinic transversal intersections. In such a way, a criterion for the onset of chaotic oscillations is formulated for liquid-filled gyrostats with ellipsoidal and torus-shaped cavities and the results are confirmed via numerical simulations. (c) 2006 Elsevier Ltd. All rights reserved.

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Chaotic orientations of a top containing a fluid filled cavity are investigated analytically and numerically under small perturbations. The top spins and rolls in nonsliding contact with a rough horizontal plane and the fluid in the ellipsoidal shaped cavity is considered to be ideal and describable by finite degrees of freedom. A Hamiltonian structure is established to facilitate the application of Melnikov-Holmes-Marsden (MHM) integrals. In particular, chaotic motion of the liquid-filled top is identified to be arisen from the transversal intersections between the stable and unstable manifolds of an approximated, disturbed flow of the liquid-filled top via the MHM integrals. The developed analytical criteria are crosschecked with numerical simulations via the 4th Runge-Kutta algorithms with adaptive time steps.

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Recently Hupe and Rubin (2003, Vision Research 43 531 - 548) re-introduced the plaid as a form of perceptual rivalry by using two sets of drifting gratings behind a circular aperture to produce quasi-regular perceptual alternations between a coherent moving plaid of diamond-shaped intersections and the two sets of component 'sliding' gratings. We call this phenomenon plaid motion rivalry (PMR), and have compared its temporal dynamics with those of binocular rivalry in a sample of subjects covering a wide range of perceptual alternation rates. In support of the proposal that all rivalries may be mediated by a common switching mechanism, we found a high correlation between alternation rates induced by PMR and binocular rivalry. In keeping with a link discovered between the phase of rivalry and mood, we also found a link between PMR and an individual's mood state that is consistent with suggestions that each opposing phase of rivalry is associated with one or the other hemisphere, with the 'diamonds' phase of PMR linked with the 'positive' left hemisphere.

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O estudo investiga os fluxos de comunicação nas organizações, refletindo sobre o modelo dos 3 Puts (inputs, throughputs, outputs), que propicia uma visão sistêmica interdepartamental, aumentando a interação e a consciência entre os setores para a realização dos objetivos organizacionais. Apresenta as características e intersecções entre comunicação mercadológica, comunicação institucional e comunicação administrativa. Oferece um ponto de encontro entre esses conceitos e reflete sobre o modelo de Comunicação Integrada Tridimensional, quando todas as ações da comunicação organizacional convergem, baseadas no trinômio Missão, Visão e Valores e nos 14 passos da comunicação de Yanaze (2013). Outra análise é verificar os pressupostos teóricos com um estudo de caso da empresa Magazine Luiza, a fim de verificar de que forma o conceito de comunicação integrada está fundamentado no planejamento e na unicidade da mensagem desta organização. A metodologia consistiu em pesquisa bibliográfica, estudo de caso e aplicação de entrevistas. Entre os resultados encontrados, demonstrou-se, tanto na pesquisa teórica quanto empírica, que a abordagem sistêmica e a proposta de Comunicação 3D, de fato, oferecem caminhos para uma eficaz gestão da comunicação integrada.

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The 1950s and 1960s were a key moment in the development of postwar France. The period was one of rapid change, derived from post-World War II economic and social modernization; yet many traditional characteristics were retained. By analyzing the eruption of the new postwar world in the context of a France that was both modern and traditional, we can see how these worlds met and interacted, and how they set the scene for the turbulent 1960s and 70s. The examination of the development of mass culture in post-war France, undertaken in this volume, offers a valuable insight into the shifts that took place. By exploring stardom from the domain of cinema and other fields, represented here by famous figures such as Brigitte Bardot, Johnny Hallyday or Jean-Luc Godard, and less conventionally treated areas of enquiry (politics [de Gaulle], literary [Françoise Sagan], and intellectual culture [Lévi-Strauss]) the reader is provided with a broad understanding of the mechanisms of popularity and success, and their cultural, social, and political roles. The picture that emerges shows that many cultural articulations remained or became identifiably French; in spite of the American mass-culture origins of these social, economic, and cultural transformations.

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Quality of services (QoS) support is critical for dedicated short range communications (DSRC) vehicle networks based collaborative road safety applications. In this paper we propose an adaptive power and message rate control method for DSRC vehicle networks at road intersections. The design objective is to provide high availability and low latency channels for high priority emergency safety applications while maximizing channel utilization for low priority routine safety applications. In this method an offline simulation based approach is used to find out the best possible configurations of transmit power and message rate for given numbers of vehicles in the network. The identified best configurations are then used online by roadside access points (AP) according to estimated number of vehicles. Simulation results show that this adaptive method significantly outperforms a fixed control method. © 2011 Springer-Verlag.

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This article explores the intersections of silence and transitional justice in Serbia, where, it is often suggested, the general public is silent and indifferent about human rights abuses that took place during the former Yugoslav conflicts. It considers both the 'silent' public and the ways in which transitional justice may be complicit in silencing it. Based on scholarship that suggests silences are not absences but rather sites of silent knowledge or a result of silencing, the article explores some of the dynamics hidden within the public's silence: shared knowledge, secret practices and inability to discuss violence. It also considers the ways in which audiences subvert and resist organized transitional justice initiatives or are caught up in a 'silent dilemma' in which they are unable to speak about the past under the discursive conditions created by transitional justice practitioners.