1,075 research outputs found
Genetic parameters for social effects on survival in cannibalistic layers: Combining survival analysis and a linear animal model
No full textAbstract Background Mortality due to cannibalism in laying hens is a difficult trait to improve genetically, because censoring is high (animals still alive at the end of the testing period) and it may depend on both the individual itself and the behaviour of its group members, so-called associative effects (social interactions). To analyse survival data, survival analysis can be used. However, it is not possible to include associative effects in the current software for survival analysis. A solution could be to combine survival analysis and a linear animal model including associative effects. This paper presents a two-step approach (2STEP), combining survival analysis and a linear animal model including associative effects (LAM). Methods Data of three purebred White Leghorn layer lines from Institut de Sélection Animale B.V., a Hendrix Genetics company, were used in this study. For the statistical analysis, survival data on 16,780 hens kept in four-bird cages with intact beaks were used. Genetic parameters for direct and associative effects on survival time were estimated using 2STEP. Cross validation was used to compare 2STEP with LAM. LAM was applied directly to estimate genetic parameters for social effects on observed survival days. Results Using 2STEP, total heritable variance, including both direct and associative genetic effects, expressed as the proportion of phenotypic variance, ranged from 32% to 64%. These results were substantially larger than when using LAM. However, cross validation showed that 2STEP gave approximately the same survival curves and rank correlations as LAM. Furthermore, cross validation showed that selection based on both direct and associative genetic effects, using either 2STEP or LAM, gave the best prediction of survival time. Conclusion It can be concluded that 2STEP can be used to estimate genetic parameters for direct and associative effects on survival time in laying hens. Using 2STEP increased the heritable variance in survival time. Cross validation showed that social genetic effects contribute to a large difference in survival days between two extreme groups. Genetic selection targeting both direct and associative effects is expected to reduce mortality due to cannibalism in laying hens.</p
Vashti and Esther : a story of society to-day.
No full textBy the author of Belle's letters in "The world."Mode of access: Internet
Métricas de autor Norhy Esther Torregrosa Jiménez
No full textInforme de las métricas de autor de la Dra. Norhy Esther Torregrosa Jiménez de las publicaciones indexadas en Google Académico cuyo objetivo es entregar un insumo para el fortalecimiento de las capacidades y potencialidades de los autores de la Universidad Santo Tomás en el posicionamiento y visibilidad de sus publicacionesReport of the author metrics of Norhy Esther Torregrosa Jiménez of the publications indexed in Google Scholar whose objective is to provide an input for the strengthening of the capacities and potentialities of the authors of the Santo Tomás University in the positioning and visibility of their publications.http://unidadinvestigacion.usta.edu.c
Effects of outliers on the identification and estimation of GARCH models
No full textThis paper analyses how outliers affect the identification of conditional heteroscedasticity and the estimation of generalized autoregressive conditionally heteroscedastic (GARCH) models. First, we derive the asymptotic biases of the sample autocorrelations of squared observations generated by stationary processes and show that the properties of some conditional homoscedasticity tests can be distorted. Second, we obtain the asymptotic and finite sample biases of the ordinary least squares (OLS) estimator of ARCH(p) models. The finite sample results are extended to generalized least squares (GLS), maximum likelihood (ML) and quasi-maximum likelihood (QML) estimators of ARCH(p) and GARCH(1,1) models. Finally, we show that the estimated asymptotic standard deviations are biased estimates of the sample standard deviations. Copyright 2007 The Authors Journal compilation 2007 Blackwell Publishing Ltd.
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The Nature and Import of the Relationship Between the Joseph Story in Genesis and the Book of Esther
No full textThis study offers an extended, detailed examination of the nature and character of the relationship between the story of Joseph in Genesis and the book of Esther. While also engaging the court narratives found in the first half of the book of Daniel, this dissertation seeks to underscore the sustained and constructive comparison between Joseph and Esther: the author of the latter knew and meaningfully invoked the former throughout his telling of the Megillah.
Firmly situated in the growing field of biblical intertextuality, the present work strikes a different chord on three important but also intertwined issues. While many learned and helpful books in this growing subfield bring scores of intertextual examples from across the entirety of biblical literature, this project has, in an effort to hone in more closely on the complexities of this particular case, limited itself in the main just to the texts of Joseph and Esther; and in so doing, the goal is to bring some of the more difficult theoretical underpinnings of such an endeavor into sharper relief. Second, the argumentation presented here leans heavily upon and therefore strongly encourages the importance of structural overlap, pushing past the oft-cited although admittedly crucial similarities of language that fill the previous studies off of which the present one builds. And third, the precisely defined focus of the evidence examined offers greater diachronic and theological insight into the book of Esther; it therefore does not seek to explain the development and hermeneutical techniques of all, or at least large swaths, of later biblical literature.
Speaking then most directly to the interpretation of Esther and its placement in the canon, this dissertation offers a fresh take on the confusion and disputes that characterizes the scholarly conversation of these two issues. In proving that the author of Esther knew and continuously alluded to Joseph, it will be suggested that the Megillah most certainly presents itself as a key part of the developing literary and theological tradition of ancient Israel; and that any historically sensitive reading of this book must understand it as such. While such an approach in no way endorses reading God into the noticeable and suggestive absence, it does conclude that the patterns initiated by the divine in the past continue to influence and at times even control the present moment of the Megillah.Near Eastern Languages and CivilizationsHebrew Bible; Biblical Studie
ESTHER C. CASSIDY
No full textESTHER C. CASSIDY
Inducted: 1999
Citation: Science policy, physics, electrical engineering For leadership of NBS/NIST Congressional relations in turbulent years when existing NBS programs were proposed for elimination (and defended successfully) and major new programs including the Baldrige Awards, Manufacturing Extension Program and Advanced Technology Program were defined, established and implemented.
Tenure: 1955-1997
Birth: 1933, Upper Marlboro, Maryland
Education:
Manhattanville College, BA (Physics), 1955
Positions held:
Physical Scientist, Research and Development
Scientific Adviser to U.S. Representative Teno Roncalio (D-WY)
U.S. Department of Commerce Federal Women's Committee Representative
Director of Congressional and Legislative Affairs
Honors:
U.S. Department of Commerce: Silver Medal, 1970; Science and Technology Fellowship, 1973?74;
U.S. Department of Commerce and U.S. Energy Research and Development Administration Special Achievement and Incentive Awards
Memberships:
Institute of Electrical and Electronics Engineers (Senior Member)
American Physical Society
Electrostatics Society of America
Publications:
Author of many articles in science and engineering journals and several patents
Scythian gold : treasures from ancient Ukraine /
No full text"Scythian Gold and the exhibition it accompanies, "Gold of the Nomads: Scythian Treasures from Ancient Ukraine," present the most important Scythian gold objects in Ukraine, many of which were discovered only in the last two decades. This exhibition and catalogue combine an analysis of these pieces with an overview of recent advances in our understanding of Scythian culture."--Jacket.Includes bibliographical references (pages 335-348) and index.Foreword / Gary Vikan, Gerry Scott III and Serhii Chaikovs'kyi / [and others] -- Preface / Ellen D. Reeder -- Satellite Map of Eastern Europe and Central Asia -- Essays. Scythia and the Scythians / Lada Onyshkevych. Scythian Art / Ellen Reeder. Early Nomadic Sources for Scythian Art / Esther Jacobson. The Workshop of the Gorytos and Scabbard Overlays / Michael Treister. Burial Mounds of the Scythian Aristocracy in the Northern Black Sea Area / P.P. Tolochko and S.V. Polin. A Short Note on Scythians in the History of Ukraine / V.I. Murzin. Scythian Culture in the Central Dnipro Areas / Tetiana Bohush and Halyna Buzian. The National Museum of the History of Ukraine. The Iron Age Collection / Svitlana Korets'ka and Liudmyla Strokova. Scythian Gold in the Museum of Historical Treasures / Olena Pidvysots'ka -- The Catalogue. Bratoliubivs'kyi Kurhan. Babyna Mohyla. Soboleva Mohyla -- Maps: Civilizations of the Ancient World, Excavation Sites of Objects in the Exhibition -- Selected Ancient Sources Relating to Scythians."Scythian Gold and the exhibition it accompanies, "Gold of the Nomads: Scythian Treasures from Ancient Ukraine," present the most important Scythian gold objects in Ukraine, many of which were discovered only in the last two decades. This exhibition and catalogue combine an analysis of these pieces with an overview of recent advances in our understanding of Scythian culture."--Jacket.Bourgeois, Jea
Can breeders solve mortality due to feather pecking in laying hens?
No full textMortality due to feather pecking (FP) has large economic and welfare consequences in the commercial poultry industry, and reduces survival of birds. With FP, the survival time of a hen depends both on her own genetic ability to avoid becoming the victim of FP (direct genetic effect; DGE), and on the genetic tendency of her group mates to perform FP (indirect genetic effect; IGE). Thus, to improve survival time of laying hens, it is important to use a breeding strategy that captures both the DGE and the IGE of selection candidates. Here, we investigate the prospects for solving mortality due to FP in laying hens by genetic selection. First, we review genetic parameters for survival time. Second, we use deterministic simulation to predict response to selection for 2 multi-trait crossbred breeding programs, a traditional recurrent testing scheme (RT) and a genomic selection scheme (GS). Finally, we investigate the prospects for sustained improvement of survival time when mortality becomes low. Results show that survival time has considerable heritable variation; most estimates of the total additive genetic standard deviation are larger than 1 mo. As expected, predicted single generation response to selection in survival time with GS is substantial larger than with RT. Particularly when the correlation between survival time and other breeding goal traits is zero, the GS scheme yields substantial improvement in survival time. For example, when mortality is 35%, the genetic correlation between survival time and other traits is 0, allowing for a 10% reduction of response in other traits, and when selection takes place in both the sire line and dam line, survival time can be improved with ∼23 D in one generation, using GS. Results, however, also show a strong decrease in heritability when mortality decreases, indicating that continued improvement becomes increasingly difficult. In summary, our results show that breeders can considerably reduce mortality due to FP with limited reduction of improvement in other breeding goal traits.</p
A qualitative analysis of the comprehension subtest of the WISC-R among emotionally handicapped and non-handicapped adolescents
No full textThere is no abstract available for this dissertation.Thesis (D. Ed.
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Comparative study of staff development in academic libraries of Mainland China and Hong Kong
No full textThe aim of this study is to conduct a comparison between the staff training and development (T & D) of academic libraries in Mainland China and Hong Kong -- two systems developed under fast-changing cultural, political and socio-economic environments in the past century. This paper argues that socio-economic, cultural and technological changes are pushing the development of academic library systems in the two regions towards convergence. The comparison identifies differences and similarities in staff T & D policies and practices of academic libraries in the two regions, as well as the contributing factors. The analysis is supported by the results of a survey conducted by the author in 2005. It concluded that the two systems share similar concerns and problems in many aspects, and one of the major contributing factors may be the size of the library
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