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Search Results: 1 - 10 of 1286 matches for " Catalina; Harlow "
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Mortalidad infantil y marginación urbana: análisis espacial de su relación en una ciudad de tama?o medio del noroeste mexicano
álvarez,Gerardo; Lara,Francisco; Harlow,Siobán D.; Denman,Catalina;
Revista Panamericana de Salud Pública , 2009, DOI: 10.1590/S1020-49892009000700005
Abstract: objective: to identify areas with high risk of infant mortality and any possible correlation with the population’s socioeconomic status through the use of a geographicinformation system and spacial analysis techniques. methods: an exploratory ecologic study was conducted in hermosillo, the capital of sonora, mexico, in 2000-2003. the urban marginalization index (umi) and the infantmortality rate (imr) were determined for each of the city’s basic geostatistical areas(bga). the umi and imr were statistically calculated to identify geographic areas inwhich they were concentrated and to determine the degree of spatial correlation between these indicators. to determine the general spatial autocorrelation and spatialclustering of umis and imrs within the city and the bgas, morans i index, ipop statistics, and besag and newell’s method were employed. results: the mean imr was 14.3 per 1000 live births, higher in the bgas withgreater social marginalization (16.2 per 1000) and lower in those with less (11.7 per 1000). the umi range was -3.1-6.6 (maximum: 4.3; minimum: -2.7). autocorrelation was found among the umi (moran i = 0.62), with significant clustering in the city’s northwest, northeast, and southeast parts. local clustering of high imrs was found in hermosillo’s central and western areas, albeit without autocorrelation (moran i = -0.007). high risk areas (high imr and high umi) were found in the city’s north-western section. conclusions: spatial clusters with high imr were found in socially marginalizedareas in the northwestern part of hermosillo, a city of medium size located in north-western mexico. these results, reached through a combination of spatial analysistechniques and geographic information tools can help guide interventions specifically designed for these high risk residential areas.
Quality of cause-of-death statements and its impact on infant mortality statistics in Hermosillo, Mexico
álvarez,Gerardo; Harlow,Siobán D.; Denman,Catalina; Hofmeister,Mary J.;
Revista Panamericana de Salud Pública , 2009, DOI: 10.1590/S1020-49892009000200004
Abstract: objectives: this study evaluates the quality (completeness and accuracy) of cause-of-death (cod) statements in infant death certificates as entered into a vital records system and as sesses its impact on infant mortality statistics in hermosillo, sonora, mexico. methods: cod statements in a systematic random sample of 200 infant death certificates were compared to their corresponding medical charts. the underlying cods (ucods) orig inally recorded in each death certificate were contrasted with those assigned by an expert re viewer. coding for the original and "new" ucods was based on the three-digit category of the international classification of diseases, 10th revision. measurements of agreement be tween the two sets of ucods were calculated and logistic regression was performed to deter mine factors associated with agreement. results: overall agreement between the original and new ucods was 52%. agreement was excellent for the group of deaths due to congenital malformations, deformations, and chro mosomal abnormalities (kappa = 0.77); substantial for conditions originating in the perinatal period (kappa = 0.74); and poor for certain infectious and parasitic diseases, and respiratory diseases (kappa = 0.35). overestimation (false-positive reporting) was highest (13%) for peri natal conditions, while underestimation (false-negative reporting) was highest (71%) for cer tain infectious and parasitic diseases, and respiratory diseases. agreement was associated with type of ucod (endogenous versus exogenous) and time of death. conclusion: more than half (53%) of cod statements in infant death certificates in her mosillo were inaccurately completed, which may lead to inaccurate interpretation of causes of infant mortality. systematic assessments of the quality of cod statements may improve the quality of mortality statistics.
Validity of underlying cause of death statistics in Hermosillo, Mexico
Carvalho,Mary H Freire de; álvarez-Hernández,Gerardo; Denman,Catalina; Harlow,Siobán D;
Salud Pública de México , 2011, DOI: 10.1590/S0036-36342011000400005
Abstract: objective: this paper assesses the quality of the underlying cause of death (cod) statistics in hermosillo, mexico in a random sample of 300 in-hospital adult deaths. material and methods: a "gold standard" cod, determined by a systematic review of hospital medical charts, was compared to the cod reported by the vital registry system. results: overall agreement between the reviewer and original cod at the icd-10 chapter block was 69.2%, with a weighted kappa of 0.62. agreement varied greatly by icd-10 chapter. mutual misclassification among common co-morbidities,such as diabetes mellitus and circulatory disease, minimized the net change in the mortality fraction assigned to each icd-10 chapter after physician review. conclusions: the icd-10 chapter level underlying cod codes can be used to estimate disease burden in the population. caution is recommended for use of vital registry statistics in hermosillo for individual level or disease-specific analyses.
Public Spheres, Personal Papers, Pedagogical Practices: Ruth First’s Academic Postings to/ from Dar es Salaam and Maputo
B Harlow
Africa Development , 2010,
Abstract: This article proposes to consider, in particular, Ruth First’s work in her final years at the University of Dar es Salaam (Tanzania) and Universidade Eduardo Mondlane, Maputo, Mozambique (UEM), with reference to her own biographical trajectory and towards a reconsideration of contemporary and subsequent developments in the institutional history of post-independence education: public spheres (the university), personal papers (the archive), and pedagogical practices (the classroom).
Note on Pterergates in the Californian Harvester Ant
Harlow Shapley
Psyche , 1920, DOI: 10.1155/1920/73165
A Simple Bound on the Error of Perturbation Theory in Quantum Mechanics
Daniel Harlow
Physics , 2009,
Abstract: I provide a straightforward proof that a simple harmonic oscillator perturbed by an (almost) arbitrary positive interaction has a perturbative expansion for any finite-time Euclidian transition amplitude which obeys the following result: the difference of the sum of the first N terms of the series and the exact result is bounded in absolute value by the next term in the series. The proof makes no assumptions about either the strength of the interactions or the convergence of the perturbation series. I then argue that the result generalizes immediately to a much broader class of quantum mechanical systems, including bare perturbation theory in quantum field theory. The case of renormalized perturbation theory is more subtle and remains open, as does the generalization to energy levels and connected S-matrix elements.
Complementarity, not Firewalls
Daniel Harlow
Physics , 2012,
Abstract: In this note I argue that a version of complementarity is possible which evades the need for the "firewalls" recently proposed by Almheiri, Marolf, Polchinski, and Sully to burn up observers falling into black hole horizons. In particular I claim that it is consistent for an infalling observer to fall through an "old" black hole horizon without burning up, without this observer or any other seeing information loss or a violation of low energy effective field theory in an unexpected place. The reason that AMPS find the opposite conclusion is because they attempt to use low energy physics to translate between the quantum mechanics of different observers rather than to describe the experiments of only a single observer; I argue that this translation is polluted by short-distance physics related to stretched horizons.
Neighborhood socio-environmental vulnerability and infant mortality in Hermosillo, Sonora
Lara-Valencia,Francisco; álvarez-Hernández,Gerardo; Harlow,Siobán D; Denman,Catalina; García-Pérez,Hilda;
Salud Pública de México , 2012, DOI: 10.1590/S0036-36342012000400006
Abstract: objective: this paper explores the impact of contextual variables at the neighborhood level on a health marker in the city of hermosillo, mexico and discusses the importance of collaboration between planners and health professional to minimize the negative effect of contextual factors on urban health. materials and methods: few studies in mexico have assessed health outcomes at the intra-urban scale and their interaction with neighborhood-level contextual variables. using spatial analysis and geographical information systems, the paper explores the association between infant mortality and an index of socio-environmental vulnerability used to measure urban contextual factors. results: two high infant mortality clusters were detected within neighborhoods characterized by relatively good environmental conditions and one in a neighborhood with a poor environment. conclusions: our results show the clustering of high infant mortality areas and some association with built environment factors in hermosillo. the results support the need to reconnect public health and urban planning as a way to create healthier environments in mexican cities.
Analytic Coleman-De Luccia Geometries
Xi Dong,Daniel Harlow
Physics , 2011, DOI: 10.1088/1475-7516/2011/11/044
Abstract: We present the necessary and sufficient conditions for a Euclidean scale factor to be a solution of the Coleman-De Luccia equations for some analytic potential $V(\phi)$, with a Lorentzian continuation describing the growth of a bubble of lower-energy vacuum surrounded by higher-energy vacuum. We then give a set of explicit examples that satisfy the conditions and thus are closed-form analytic examples of Coleman-De Luccia geometries.
Quantum Computation vs. Firewalls
Daniel Harlow,Patrick Hayden
Physics , 2013, DOI: 10.1007/JHEP06(2013)085
Abstract: In this paper we discuss quantum computational restrictions on the types of thought experiments recently used by Almheiri, Marolf, Polchinski, and Sully to argue against the smoothness of black hole horizons. We argue that the quantum computations required to do these experiments take a time which is exponential in the entropy of the black hole under study, and we show that for a wide variety of black holes this prevents the experiments from being done. We interpret our results as motivating a broader type of non-locality than is usually considered in the context of black hole thought experiments, and claim that once this type of non-locality is allowed there may be no need for firewalls. Our results do not threaten the unitarity of of black hole evaporation or the ability of advanced civilizations to test it.
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