Página 1 dos resultados de 1431 itens digitais encontrados em 0.005 segundos

## O acesso na rede pública de saúde no município de Ijuí/RS: um cenário de controvérsias; The users access to the public health system in the borough of Ijuí/RS: a controversial scenery.

Weiller, Teresinha Heck
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Relevância na Pesquisa
26.94%

## Preservação do cenário urbano espacial e sociocultural do bairro Teresópolis/Porto Alegre/RS : análise crítica da evolução imposta frente à morfologia urbana preexistente; Preservation of the spatial and sociocultural urban scenery of the neighborhood of Teresopolis/ Porto Alegre/RS a critical analysis of the imposed evolution in face of the preexistant urban morphology

Mascarello, Ricardo Soares
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
27.09%
O estudo propõe uma análise crítica do cenário urbano atual, frente à descaracterização da morfologia urbana preexistente na cidade de Porto Alegre – RS, especificamente tomandose como enfoque de caso o bairro Teresópolis. Para isto, desenvolve-se uma avaliação dos Planos Diretores do município de Porto Alegre, identificando-se sua influência na construção da paisagem urbana porto-alegrense. Neste sentido, referencia-se contextualmente as características do bairro Teresópolis, frente à sua evolução urbana, identificando suas transformações ao longo da história e, principalmente, dentro de sua atual configuração, as possíveis conseqüências que vêem acarretando prejuízos em sua paisagem urbana natural e cultural. O principal objetivo é destacar os fatores que estão propiciando as transformações de descaracterização dos ambientes com valor significativo, tanto do ponto de vista histórico, quanto sociocultural. Os principais fatores de transformações abordados situam-se em toda ordem da sintaxe urbana, referente às construções atípicas, com características não contextuais e volumetrias e demais regimes urbanísticos não compatíveis frente às existentes, a traçados viários e estruturas de mobilidade urbana que não respeitam as típicas zonas residenciais puras e a não valorização do potencial natural. O pressuposto é que estes ambientes perpetuam um significado para a cidade e consolidam características que conferem qualidade ao meio urbano...

## Hibridismo cultural e linguistico no universo escolar : confronto e conflito de vozes na construção de identidades; Cultural and linguistics hybridism in the school scenery: conflicting voices in the construction of identities

Paulo Roberto Almeida
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Relevância na Pesquisa
27.09%

## Transposição didática reflexiva : um olhar voltado para a prática pedagógica

Civiero, Paula Andrea Grawieski
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
26.94%
Com esta pesquisa busquei constituir cenários para investigação para as aulas de matemática a partir da produção decorrente de pesquisas realizadas no Projeto de Iniciação Científica no Instituto Federal de Educação, Ciência e Tecnologia Catarinense - Campus Rio do Sul. Para atingir os objetivos propostos por esta pesquisa, elaborei uma possibilidade educacional através da investigação de situações-problema da vida real, o que possibilitou identificar e significar os conceitos matemáticos em análise. A pesquisa foi embasada na teoria da Transposição Didática, discutida por Chevallard, com o intuito de auxiliar no trabalho de adaptar e transformar os conhecimentos produzidos em projetos de Iniciação Científica para um conhecimento que possa ser desenvolvido e produzido em sala de aula. Para que a transposição viesse acontecer num viés reflexivo procurei discutir a Educação Matemática Crítica, segundo Skovsmose. Provocando assim, uma reflexão sobre os conteúdos matemáticos envolvidos e a realidade inerente ao contexto. Ao procurar interagir os pressupostos teóricos com a realidade, atingi o objetivo da pesquisa e denominei este trabalho de Transposição Didática Reflexiva, com o intuito de unir as duas teorias num processo em que o saber a ser ensinado seja adaptado de forma a provocar reflexões...

## Assessing and managing scenery of the Caribbean Coast of Colombia

Rangel-Buitrago, Nelson; Correa-Arango, Ivan D.; Anfuso, Giorgio; Williams, Allan T.; Ergin, Aysen
Fonte: Elsevier; Grupo de Investigaci??n Ciencias del Mar; Escuela de Ingenier??a Publicador: Elsevier; Grupo de Investigaci??n Ciencias del Mar; Escuela de Ingenier??a
Tipo: article; Art??culo; publishedVersion
ENG
Relevância na Pesquisa
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This study provides the coastal scenery assessment of 135 sites along the Colombian Caribbean littoral by analysing 26 physical and human factors. Sites were categorised into ???ve classes from Class 1, top grade scenery, to Class 5, poor scenery -- Fifty ???ve percent of the investigated coastal areas were included in Classes 1 and 2, 18% belonged to Class 3 and 47% of the sites fall into Classes 4 and 5 -- Classi???cation of analysed sites depends on the geological setting and the degree of human occupation -- Classes 1 and 2 sites are located in natural protected areas in La Guajira and Magdalena departments -- Low classi???cation recorded at Classes 3, 4 and 5 corresponds to a progressive decrease of both natural and (especially) human parameters -- Concerning coastal management issues, emphasis should be given to the upgrading of human parameters eliminating litter and sewage evidences, vegetation debris and enhancing beach nourishment works

## 21M.734 Design For the Theater - Scenery, Spring 2003; Design For the Theater - Scenery

Fregosi, William A.
Fonte: MIT - Massachusetts Institute of Technology Publicador: MIT - Massachusetts Institute of Technology
EN-US
Relevância na Pesquisa
26.94%
This course examines scenic design as practiced currently and historically, including the use of performance space in western and other cultures, and the audience-performer relationship. Four plays and/or one act operas are designed, accompanied by a study of the social, political and artistic conditions attendant upon their creation and their relevance to a modern audience. Students develop, present and orally defend designs in a variety of two- and three-dimensional media in open studio with an eye to developing a self-critical ability. The final project is a fifth design of the student's choice, consisting of a written concept statement, script analysis and a colored model or renderings.

## Markers for error-corrupted observations

Matzinger, Heinrich; Hart, Andrew
Tipo: Artículo de revista
EN
Relevância na Pesquisa
27.36%
A scenery is a coloring #24; of the integers. Let (S(t))t#21;0 be a recurrent random walk on the integers. Observing the scenery #24; along the path of this random walk, one sees the color #24;(S(t)) at time t. The scenery reconstruction problem is concerned with trying to retrieve the scenery #24; , given only the sequence of observations #31; := (#24;(S(t)))t#21;0. Russel Lyons and Yuval Peres have both posed the question of whether two-color sceneries can be reconstructed when the observations are corrupted by random errors. The random errors happening at different times are independent conditional on #31;. It has been proved that it is possible to do reconstruction in the case where the observations are contaminated with errors and the scenery has several colors, provided the error probability is small enough. However, the reconstruction problem is more difficult with fewer colors. Although the scenery reconstruction problem for two-color sceneries from error-free observations has been solved, the reconstruction of two-color sceneries from error-corrupted observations remains an open problem. In this paper, we solve one of the two remaining problems needed in order to reconstruct two-color sceneries when the observations are corrupted with random errors. We prove that given only the corrupted observations...

## Reconstructing a two-color scenery by observing it along a simple random walk path

Matzinger, Heinrich
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
27.09%
Let {\xi (n)}_{n\in Z} be a two-color random scenery, that is, a random coloring of Z in two colors, such that the \xi (i)'s are i.i.d. Bernoulli variables with parameter \tfrac12. Let {S(n)}_{n\in N} be a symmetric random walk starting at 0. Our main result shows that a.s., \xi \circ S (the composition of \xi and S) determines \xi up to translation and reflection. In other words, by observing the scenery \xi along the random walk path S, we can a.s. reconstruct \xi up to translation and reflection. This result gives a positive answer to the question of H. Kesten of whether one can a.s. detect a single defect in almost every two-color random scenery by observing it only along a random walk path.; Comment: Published at http://dx.doi.org/10.1214/105051604000000972 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)

## Random walk in random scenery: A survey of some recent results

Hollander, Frank den; Steif, Jeffrey E.
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
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. In this paper we give a survey of some recent results for random walk in random scenery (RWRS). On $\mathbb {Z}^d$, $d\geq 1$, we are given a random walk with i.i.d. increments and a random scenery with i.i.d. components. The walk and the scenery are assumed to be independent. RWRS is the random process where time is indexed by $\mathbb {Z}$, and at each unit of time both the step taken by the walk and the scenery value at the site that is visited are registered. We collect various results that classify the ergodic behavior of RWRS in terms of the characteristics of the underlying random walk (and discuss extensions to stationary walk increments and stationary scenery components as well). We describe a number of results for scenery reconstruction and close by listing some open questions.; Comment: Published at http://dx.doi.org/10.1214/074921706000000077 in the IMS Lecture Notes--Monograph Series (http://www.imstat.org/publications/lecnotes.htm) by the Institute of Mathematical Statistics (http://www.imstat.org)

## On the asymptotics of the scenery flow

Aspenberg, Magnus; Ekström, Fredrik; Persson, Tomas; Schmeling, Jörg
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
27.09%
Various notions of "zooming in" on measures exist in the literature and the scenery flow is one of them. It is of interest to describe the joint asymptotics of the scenery flows generated by a measure and the measure transported by a local diffeomorphism. We give both sufficient and necessary conditions for the scenery distributions to be asymptotic and provide some examples.; Comment: 19 pages

## Reconstruction of a multidimensional scenery with a branching random walk

Matzinger, Heinrich; Popov, Serguei; Pachon, Angelica
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
27.09%
In this paper we consider a d-dimensional scenery seen along a simple symmetric branching random walk, where at each time each particle gives the color record it is seeing. We show that we can a.s. reconstruct the scenery up to equivalence from the color record of all the particles. For this we assume that the scenery has at least 2d + 1 colors which are i.i.d. with uniform probability. This is an improvement in comparison to [22] where the particles needed to see at each time a window around their current position. In [11] the reconstruction is done for d = 2 with only one particle instead of a branching random walk, but millions of colors are necessary.

## Scenery entropy as an invariant of RWRS processes

Austin, Tim
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
27.09%
Probabilistic models of random walks in random sceneries give rise to examples of probability-preserving dynamical systems. A point in the state spaces consists of a walk-trajectory and a scenery, and its motion' corresponds to shifting the time-origin. These models were proposed as natural examples of non-Bernoulli K-automorphisms by Adler, Ornstein and Weiss. This was proved in a famous analysis by Kalikow using Ornstein's Very Weak Bernoulli characterization of Bernoulli processes. Since then, various authors have generalized this construction to give other examples, including some smooth examples due to Katok and Rudolph. However, the methods used to prove non-Bernoullicity do not obviously show that these examples are distinct from one another. This paper introduces a new isomorphism-invariant of probability-preserving systems, and shows that in a large class of the above examples it essentially captures the Kolmogorov-Sinai entropy of the scenery process alone. As a result, constructions that use different scenery-entropies give continuum-many non-isomorphic examples. Conditionally on an invariance principle for certain local times, these include a continuum of distinct smooth non-Bernoulli K-automorphisms on a fixed compact manifold.; Comment: 105 pages. This is a preliminary version...

## Measuring Atmospheric Scattering from Digital Images of Urban Scenery using Temporal Polarization-Based Vision

El-Gaaly, Tarek; Gluckman, Joshua
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
27.09%
Particulate Matter (PM) is a form of air pollution that visually degrades urban scenery and is hazardous to human health and the environment. Current monitoring devices are limited in measuring average PM over large areas. Quantifying the visual effects of haze in digital images of urban scenery and correlating these effects to PM levels is a vital step in more practically monitoring our environment. Current image haze extraction algorithms remove haze from the scene for the sole purpose of enhancing vision. We present two algorithms which bridge the gap between image haze extraction and environmental monitoring. We provide a means of measuring atmospheric scattering from images of urban scenery by incorporating temporal knowledge. In doing so, we also present a method of recovering an accurate depthmap of the scene and recovering the scene without the visual effects of haze. We compare our algorithm to three known haze removal methods. The algorithms are composed of an optimization over a model of haze formation in images and an optimization using a constraint of constant depth over a sequence of images taken over time. These algorithms not only measure atmospheric scattering, but also recover a more accurate depthmap and dehazed image. The measurements of atmospheric scattering this research produces...

## Detecting the trail of a random walker in a random scenery

Berger, Noam; Peres, Yuval
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
27.09%
Suppose that the vertices of the Euclidean lattice Z^d are endowed with a random scenery, obtained by tossing a fair coin at each vertex. A random walker, starting from the origin, replaces the coins along its path by i.i.d. biased coins. For which walks and dimensions can the resulting scenery be distinguished from the original scenery? We find the answer for simple random walk, where it does not depend on dimension, and for walks with a nonzero mean, where a transition occurs between dimensions three and four. We also answer this question for other types of graphs and walks, and raise several new questions.; Comment: 20 pages

## Annealed deviations of random walk in random scenery

Gantert, Nina; König, Wolfgang; Shi, Zhan
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
27.09%
Let $(Z_n)_{n\in\N}$ be a $d$-dimensional {\it random walk in random scenery}, i.e., $Z_n=\sum_{k=0}^{n-1}Y(S_k)$ with $(S_k)_{k\in\N_0}$ a random walk in $\Z^d$ and $(Y(z))_{z\in\Z^d}$ an i.i.d. scenery, independent of the walk. The walker's steps have mean zero and finite variance. We identify the speed and the rate of the logarithmic decay of $\P(\frac 1n Z_n>b_n)$ for various choices of sequences $(b_n)_n$ in $[1,\infty)$. Depending on $(b_n)_n$ and the upper tails of the scenery, we identify different regimes for the speed of decay and different variational formulas for the rate functions. In contrast to recent work \cite{AC02} by A. Asselah and F. Castell, we consider sceneries {\it unbounded} to infinity. It turns out that there are interesting connections to large deviation properties of self-intersections of the walk, which have been studied recently by X. Chen \cite{C03}.; Comment: 32 pages, revised

## Large deviations for Brownian motion in a random scenery

Asselah, A.; Castell, F.
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
27.09%
We prove large deviations principles in large time, for the Brownian occupation time in random scenery. The random scenery is constant on unit cubes, and consist of i.i.d. bounded variables, independent of the Brownian motion. This model is a time-continuous version of Kesten and Spitzer's random walk in random scenery. We prove large deviations principles in quenched'' and `annealed'' settings.; Comment: 29 pages

## A crossover for the bad configurations of random walk in random scenery

Blachère, Sébastien; Hollander, Frank den; Steif, Jeffrey E.
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
27.09%
In this paper, we consider a random walk and a random color scenery on Z. The increments of the walk and the colors of the scenery are assumed to be i.i.d. and to be independent of each other. We are interested in the random process of colors seen by the walk in the course of time. Bad configurations for this random process are the discontinuity points of the conditional probability distribution for the color seen at time zero given the colors seen at all later times. We focus on the case where the random walk has increments 0, +1 or -1 with probability epsilon, (1-epsilon)p and (1-epsilon)(1-p), respectively, with p in [1/2,1] and epsilon in [0,1), and where the scenery assigns the color black or white to the sites of Z with probability 1/2 each. We show that, remarkably, the set of bad configurations exhibits a crossover: for epsilon=0 and p in (1/2,4/5) all configurations are bad, while for (p,epsilon) in an open neighborhood of (1,0) all configurations are good. In addition, we show that for epsilon=0 and p=1/2 both bad and good configurations exist. We conjecture that for all epsilon in [0,1) the crossover value is unique and equals 4/5. Finally, we suggest an approach to handle the seemingly more difficult case where epsilon>0 and p in [1/2...

## Deviations of a random walk in a random scenery with stretched exponential tails

van der Hofstad, Remco; Gantert, Nina; K{ö}nig, Wolfgang
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
27.19%
Let (Z_n)_{n\in\N_0} be a d-dimensional random walk in random scenery, i.e., Z_n=\sum_{k=0}^{n-1}Y_{S_k} with (S_k)_{k\in\N_0} a random walk in Z^d and (Y_z)_{z\in Z^d} an i.i.d. scenery, independent of the walk. We assume that the random variables Y_z have a stretched exponential tail. In particular, they do not possess exponential moments. We identify the speed and the rate of the logarithmic decay of Pr(Z_n>t_n n) for all sequences (t_n)_{n\in\N} satisfying a certain lower bound. This complements previous results, where it was assumed that Y_z has exponential moments of all orders. In contrast to the previous situation,the event \{Z_n>t_nn\} is not realized by a homogeneous behavior of the walk's local times and the scenery, but by many visits of the walker to a particular site and a large value of the scenery at that site. This reflects a well-known extreme behavior typical for random variables having no exponential moments.; Comment: 12 pages

## Upper limits of Sinai's walk in random scenery

Zindy, Olivier
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
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We consider Sinai's walk in i.i.d. random scenery and focus our attention on a conjecture of R\'ev\'esz \cite{r05} concerning the upper limits of Sinai's walk in random scenery when the scenery is bounded from above. A close study of the competition between the concentration property for Sinai's walk and negative values for the scenery enables us to prove that the conjecture is true if the scenery has "thin" negative tails and is false otherwise.; Comment: 29 pages