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Search Results: 1 - 10 of 5232 matches for " Catherine Baron "
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Mutations institutionnelles et recompositions des territoires urbains en Afrique : une analyse à travers la problématique de l’accès à l’eau
Catherine Baron
Développement Durable et Territoires , 2006,
Abstract: L’accès à l’eau est une priorité des politiques urbaines conduites dans les pays en développement. Ces politiques ont oscillé entre la volonté de généraliser l’accès aux réseaux afin de contr ler l’espace urbain et une segmentation de l’offre afin de cibler différemment les diverses catégories de la population. Quel est alors l’impact, au niveau spatial, des choix opérés dans ce domaine dans les métropoles d’Afrique Sub-saharienne francophone ? Nous articulerons des approches ciblées sur la compréhension des stratégies d’acteurs aux logiques parfois opposées, avec des analyses spatiales permettant de décoder la complexité de la structuration des espaces urbains. Nous repérerons trois phases caractérisées par une articulation originale entre les modes de gouvernance de l’eau retenus et la structuration des espaces urbains. Dans un premier temps, on constate une dualisation de l’espace urbain renforcée par un accès segmenté aux services. Puis, dans un deuxième temps, nous montrerons comment les préconisations faites dans le cadre de la Décennie Internationale de l’Eau Potable et de l’Assainissement des années 1980 correspondaient à une volonté d’homogénéisation de l’espace urbain. Enfin, dans un troisième temps, nous évaluerons l’impact de modèles tels que le partenariat public-privé dans les processus de fragmentation urbaine qui caractérisent ces mégalopoles d’Afrique Sub-saharienne francophone à la période contemporaine. Access to water is one of the major challenges of urban policies implemented in developing countries. These policies aimed either to provide a global access in order to control urban spaces or to segment water supply to offer different services and features to comply with the diversity of actors. What is therefore the impact, in terms of spatial dimension, of different strategies followed by French speaking Sub-Saharan African cities ? In this paper, we combine approaches that explain conflicting actors' strategies with spatial analysis that explain the complexity of urban space organization. We outline three phases characterised by an original articulation among water governance modes and urban space organization. As a first step, we note that the trend towards dual urban organisation is reinforced by a segmented access to services. As a second step, we show how the measures advocated within the International Drinking Water Supply and Sanitation Decade of the eighties corresponded to the will to homogenise cities. As a third step, we assess the impact of models such as the private/public partnership model in the process of urban fragm
Change-Point Analysis of Survival Data with Application in Clinical Trials  [PDF]
Xuan Chen, Michael Baron
Open Journal of Statistics (OJS) , 2014, DOI: 10.4236/ojs.2014.49062
Abstract: Effects of many medical procedures appear after a time lag, when a significant change occurs in subjects’ failure rate. This paper focuses on the detection and estimation of such changes which is important for the evaluation and comparison of treatments and prediction of their effects. Unlike the classical change-point model, measurements may still be identically distributed, and the change point is a parameter of their common survival function. Some of the classical change-point detection techniques can still be used but the results are different. Contrary to the classical model, the maximum likelihood estimator of a change point appears consistent, even in presence of nuisance parameters. However, a more efficient procedure can be derived from Kaplan-Meier estimation of the survival function followed by the least-squares estimation of the change point. Strong consistency of these estimation schemes is proved. The finite-sample properties are examined by a Monte Carlo study. Proposed methods are applied to a recent clinical trial of the treatment program for strong drug dependence.
Exploring Cell Tropism as a Possible Contributor to Influenza Infection Severity
Hana M. Dobrovolny,Marc J. Baron,Ronald Gieschke,Brian E. Davies,Nelson L. Jumbe,Catherine A. A. Beauchemin
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0013811
Abstract: Several mechanisms have been proposed to account for the marked increase in severity of human infections with avian compared to human influenza strains, including increased cytokine expression, poor immune response, and differences in target cell receptor affinity. Here, the potential effect of target cell tropism on disease severity is studied using a mathematical model for in-host influenza viral infection in a cell population consisting of two different cell types. The two cell types differ only in their susceptibility to infection and rate of virus production. We show the existence of a parameter regime which is characterized by high viral loads sustained long after the onset of infection. This finding suggests that differences in cell tropism between influenza strains could be sufficient to cause significant differences in viral titer profiles, similar to those observed in infections with certain strains of influenza A virus. The two target cell mathematical model offers good agreement with experimental data from severe influenza infections, as does the usual, single target cell model albeit with biologically unrealistic parameters. Both models predict that while neuraminidase inhibitors and adamantanes are only effective when administered early to treat an uncomplicated seasonal infection, they can be effective against more severe influenza infections even when administered late.
Description biométrique de la croissance pondérale de poules naines et normales, discrimination précoce sur le poids corporel (De 0 A 9 Semaines)
R Baron
Genetics Selection Evolution , 1972, DOI: 10.1186/1297-9686-4-2-159
Abstract:
Description biométrique de la croissance des poules naines et des poules normales et leur discrimination pondérale
R Baron
Genetics Selection Evolution , 1971, DOI: 10.1186/1297-9686-3-3-377
Abstract:
决策与判断研究中的个体分析
Jonathan,Baron
心理学报 , 2010,
Abstract: 决策与判断研究中(甚至是实验心理学研究中)的许多问题关注某效应是否真实存在, 及其背后的解释是什么。这些问题不关注该效应在某一特殊群体中是否显著。因此, 可以通过分析单个被试来检验效应的显著性。如果有一个被试表现出了该效应, 那么, 这个效应就是存在的。根据这一观点, 有时也可通过跨案例或者轮次(across cases or rounds)分析来验证效应的显著性, 而不需要进行跨被试分析(across subjects )。这一观点也暗示在一些实验中可能存在反方向的效应。本文建议通过进行基于被试个体的统计分析来检验这样的效应, 并介绍了一些不同形式的方法:PP 概率图(probability probability plots); P 值分布检验(tests of the distribution of p-values); 分层取样多重检验的矫正(correction for multiple testing with step-down resampling)。这些方法都可以用于处理在对同样假设进行多重检验时无法避免的问题。另外, 本文也列举了一些例子, 其中有一部分例子存在反方向的效应, 另一部分例子不存在。
History, Politics and Political Culture: Thoughts on the Role of Historiography in Contemporary Russia
Nick Baron
Cromohs (Firenze) , 2000,
Abstract:
From Alexander von Humboldt to Frederic Edwin Church: Voyages of Scientific Exploration and Artistic Creativity
Frank Baron
HiN. Alexander von Humboldt im Netz , 2005,
Abstract: Article in English, Abstracts in Spanish, German and English.Stephen Jay Gould wrote recently that “when Church began to paint his great canvases, Alexander von Humboldt may well have been the world’s most famous and influential intellectual.” Humboldt’s influence in the case of the landscape artist Church is especially interesting. If we examine the precise relationship between the German explorer and his American admirer, we gain an insight into how Humboldt transformed Church’s life and signaled a new phase in the career of the artist. Church retraced Humboldt’s travels in Ecuador and in Mexico. If we compare the texts available to Church and the comparison of Church’s paintings and the texts and images of Humboldt’s works we can arrive at new perspectives on Humboldt’s extraordinary influence on American landscape painting in the nineteenth century.
CONCERNS ON LABOUR POWER SELECTION AND TRAINING WITHIN MICA” MINING COMPANY, DIRECTORATE OF BRAD MINES, DURING 1920-1948
MIRCEA BARON
Annals of the University of Petrosani : Economics , 2011,
Abstract: Mica” Company, through the mining complex it owned in Brad area in the Apuseni mountains, was to be the largest gold producer in Romania between the 20s and the 40s of the twentieth century. The operation of the mining complex in Brad area, including mining sites, processing units, a power plant, a railway system, as well as social and cultural facilities, needed work force. Our study focuses on the way in which the managers of Mica” Company, especially the ones of Mica” Brad, selected and trained this work force in order to cope with the complexity of production activities.
“The Seven Ages of Kylie Minogue: Postmodernism, Identity, and Performative Mimicry.”
Lee Baron
Nebula , 2008,
Abstract:
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