33 research outputs found

    Performance optimization of a leagility inspired supply chain model: a CFGTSA algorithm based approach

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    Lean and agile principles have attracted considerable interest in the past few decades. Industrial sectors throughout the world are upgrading to these principles to enhance their performance, since they have been proven to be efficient in handling supply chains. However, the present market trend demands a more robust strategy incorporating the salient features of both lean and agile principles. Inspired by these, the leagility principle has emerged, encapsulating both lean and agile features. The present work proposes a leagile supply chain based model for manufacturing industries. The paper emphasizes the various aspects of leagile supply chain modeling and implementation and proposes a new Hybrid Chaos-based Fast Genetic Tabu Simulated Annealing (CFGTSA) algorithm to solve the complex scheduling problem prevailing in the leagile environment. The proposed CFGTSA algorithm is compared with the GA, SA, TS and Hybrid Tabu SA algorithms to demonstrate its efficacy in handling complex scheduling problems

    Are the Spanish Long-Term Unemployed Unemployable?

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    Long-term unemployment reached unprecedented levels in Spain in the wake of the Great Recession and it still affects around 57% of the unemployed. We document the sources that contributed to the rise in long-term unemployment and analyze its persistence using state-ofthe- art duration models. We find pervasive evidence of negative duration dependence, while personal characteristics such as mature age, lack of experience, and entitlement to unemployment benefits are key to understand the cross-sectional differences in the incidence of long-term unemployment. The negative impact of low levels of skills and education is muted by the large share of temporary contracts, but once we restrict attention to employment spells lasting at least one month these factors also contribute to a higher risk of long-term unemployment. Surprisingly, workers from the construction sector do not fare worse than similar workers from other sectors. Finally, self-reported reservation wages are found to respond strongly to the cycle, but much less to individual unemployment duration. In view of these findings, we argue that active labour market policies should play a more prominent role in the fight against long-term unemployment while early activation should be used to curb inflows.This is a revised version of the Presidential Address of the 40th Simposio de la Asociación Española de Economía delivered by the first author in Girona (December 2015). We are grateful to Manuel Arellano, Rolf Campos, Mario Izquierdo, Ernesto Villanueva, and seminar participants at the Banco de España, the European Central Bank, the International Labor Office, and the University of Edinburgh for comments, to Yolanda Rebollo- Sanz for help with the data set, and to Lucía Gorjón and Ingeborg Kukla for excellent research assistance. Bentolila thanks the Economics Department of Universidad Carlos III de Madrid for their hospitality. García-Pérez and Jansen gratefully acknowledge financial support from MINECO/FEDER (grants ECO2015-65408-R and ECO2015-69631-P)

    Candida pelliculosa

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    Avian brains and a new understanding of vertebrate brain evolution.

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    We believe that names have a powerful influence on the experiments we do and the way in which we think. For this reason, and in the light of new evidence about the function and evolution of the vertebrate brain, an international consortium of neuroscientists has reconsidered the traditional, 100-year-old terminology that is used to describe the avian cerebrum. Our current understanding of the avian brain - in particular the neocortex-like cognitive functions of the avian pallium - requires a new terminology that better reflects these functions and the homologies between avian and mammalian brains

    Morphometric analysis of telencephalic structure in a variety of neognath and paleognath bird species reveals regional differences associated with specific behavioral traits

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    Birds exhibit a huge array of behavior, ecology and physiology, and occupy nearly every environment on earth, ranging from the desert outback of Australia to the tropical rain forests of Panama. Some birds have adopted a fully nocturnal lifestyle, such as the barn owl and kiwi, while others, such as the albatross, spend nearly their entire life flying over the ocean. Each species has evolved unique adaptations over millions of years to function in their respective niche. In order to increase processing power or network efficiency, many of these adaptations require enlargements and/or specializations of the brain as a whole or of specific brain regions. In this study, we examine the relative size and morphology of 9 telencephalic regions in a number of Paleognath and Neognath birds and relate the findings to differences in behavior and sensory ecology. We pay particular attention to those species that have undergone a relative enlargement of the telencephalon to determine whether this relative increase in telencephalic size is homogeneous across different brain regions or whether particular regions have become differentially enlarged. The analysis indicates that changes in the relative size of telencephalic regions are not homogeneous, with every species showing hypertrophy or hypotrophy of at least one of them. The three-dimensional structure of these regions in different species was also variable, in particular that of the mesopallium in kiwi. The findings from this study provide further evidence that the changes in relative brain size in birds reflect a process of mosaic evolution

    Análise epidemiológica do suicídio no Brasil entre 1980 e 2006 Epidemiological analysis of suicide in Brazil from 1980 to 2006

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    OBJETIVO: O objetivo deste estudo foi realizar uma análise epidemiológica dos índices de suicídio registrados entre 1980 e 2006 nas regiões e capitais estaduais. MÉTODO: Dados referentes à taxa de mortalidade devido ao suicídio foram coletados do Departamento de Informática do Sistema Único de Saúde. RESULTADOS: Entre 1980 e 2006, foi registrado um total de 158.952 casos de suicídio, excluindo-se os casos nos quais os indivíduos tinham menos de 10 anos de idade (n = 68). No período estudado, o índice total de suicídio cresceu de 4,4 para 5,7 mortes por 100.000 habitantes (29,5%). Os índices médios mais altos foram registrados nas regiões Sul (9,3) e Centro-Oeste (6,1). Os homens são os que têm a maior probabilidade de cometer suicídio. Os índices mais altos de suicídio foram registrados na faixa etária de 70 anos ou mais, enquanto que os maiores aumentos aconteceram na faixa etária dos 20 aos 59 anos. As principais características sociodemográficas das pessoas que cometeram suicídio durante o período estudado foram baixo nível educacional e estado civil solteiro. Os métodos mais comuns de suicídio foram por enforcamento, armas de fogo e envenenamento. CONCLUSÃO: Embora o índice brasileiro tenha crescido 29,5% em 26 anos, o índice nacional ainda é considerado baixo se comparado aos índices de suicídio mundiais (média de 4,9 por 100.000 habitantes). Os índices de suicídio nas regiões brasileiras variam muito, ou seja, estão entre 2,7 e 9,3.<br>OBJECTIVE: The objective of this study was to carry out an epidemiological analysis of the suicide rates found in Brazilian regions and state capitals between 1980 and 2006. METHOD: Data on mortality rates due to suicide were collected from the Departamento de Informática do Sistema Único de Saúde (Information Technology Department of the Brazilian Public Health System - DATASUS). RESULTS: A total of 158,952 suicide cases were registered between 1980 and 2006, excluding those cases in which the individual was less than 10 years old (n = 68). In the period under study, the total suicide rate in Brazil increased from 4.4 to 5.7 deaths per 100,000 inhabitants (29.5%). Higher average rates were found in the South (9.3) and Central-West (6.1) regions. Men were more likely to commit suicide. The highest suicide rates were found in the 70-years or above age range while the highest increases were found in the 20 to 59 year age bracket. The most dominant social-demographic characteristics of the persons who committed suicide in the period under study were low educational level and singlehood. The most common methods of suicide were hanging, fire arms and poisoning. CONCLUSION: Although in Brazil the rate increased 29.5% in 26 years, the national rate is still considered to be low when compared to worldwide suicide rates (average of 4.9 per 100,000 inhabitants). Suicide rates in Brazilian regions vary broadly, ranging from 2.7 to 9.3
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