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Search Results: 1 - 10 of 462186 matches for " Hartley A. Garfield "
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Hepatitis A Vaccine: Should We Use it in Practice?
Ramona Mahtani,Hartley A. Garfield
University of Toronto Medical Journal , 2004, DOI: 10.5015/utmj.v81i3.654
Abstract:
Comparative embryology without a microscope: using genomic approaches to understand the evolution of development
Garfield David A,Wray Gregory A
Journal of Biology , 2009, DOI: 10.1186/jbiol161
Abstract: Until recently, understanding developmental conservation and change has relied on embryological comparisons and analyses of single genes. Several studies, including one recently published in BMC Biology, have now taken a genomic approach to this classical problem, providing insights into how selection operates differentially across the life cycle.
A Amaz?nia no imaginário norte-americano em tempo de guerra
Garfield, Seth;
Revista Brasileira de História , 2009, DOI: 10.1590/S0102-01882009000100002
Abstract: this essay traces the emergence of the amazon in the united states wartime imaginary. although the geopolitical importance of diversifying rubber markets and developing synthetics had been discussed in the united states before pearl harbor, the subsequent japanese interdiction of traditional southeast asian markets sent american government officials and scientists scurrying to find alternatives. as in other regions of latin america, wartime procurement policies in the amazon divided new deal progressives and fiscal conservatives, but these policies also shaped and were shaped by entrenched myths of tropical regions and populations. then, as now, the amazon was more than a place, but also a flashpoint for americans for deeper anxieties concerning questions of race, class, and nation.
As raízes de uma planta que hoje é o Brasil: os índios e o Estado-Na??o na era Vargas
Garfield, Seth;
Revista Brasileira de História , 2000, DOI: 10.1590/S0102-01882000000100002
Abstract: this article looks at the construction of the indian by government officials and intellectuals during the estado novo (1937-45), and the efforts of indigenous peoples to engage these images. state officials - concerned with national consolidation, territorial defense, and racial pedigree - upheld the indian as na icon who had made invaluable contributions to brazilian historical and cultural formation. the proto-patriot, however, could only be fully redeemed through government tutelage. confronted by na ambiguos state project, indigenous groups demonstrated varied responses.
As raízes de uma planta que hoje é o Brasil: os índios e o Estado-Na o na era Vargas
Garfield Seth
Revista Brasileira de História , 2000,
Abstract: Este artigo examina a constru o do índio por funcionários e intelectuais durante o Estado Novo (1937-1945) e os esfor os de povos indígenas para empregar essas imagens. Funcionários do Estado - preocupados com unifica o nacional, defesa territorial e configura o racial - sustentaram o índio como um ícone que trouxe contribui es inestimáveis à forma o histórica e cultural brasileira. O proto-patriota, entretanto, só p de ser completamente redimido pela tutela governamental. Confrontados com um projeto estatal ambigüo, grupos indígenas deram várias respostas.
The meaning of the Impact Factor
Eugene Garfield
International Journal of Clinical and Health Psychology , 2003,
Abstract: El factor de impacto y otros índices bibliométricos son utilizados en la actualidad, en la mayoría de los países, para evaluar la investigación científica: proyectos de investigación, revistas, artículos, investigadores e instituciones. En el presente artículo se responden a las preguntas mas frecuentes sobre qué es el factor de impacto y cómo debe ser utilizado. En concreto, se habla de su origen, de los criterios que debe cumplir una revista, del factor de impacto como criterio de evaluación, de la relación entre la calidad de las revistas y el factor de impacto, de la evaluación de la calidad de las publicaciones, del período de evaluación para el cálculo del índice de impacto, del calculo del índice de impacto, de la comparación entre revistas de diferentes campos científicos, de la generalización del factor de impacto de una revista a cada uno de los artículos publicados en ella, de la relación entre el factor de impacto y la dificultad de publicar, del idioma en que publican las revistas y de cómo mejorar el factor de impacto de una revista.
Mood Disorders, Circadian Rhythms, Melatonin and Melatonin Agonists
M.A. Quera Salva and S. Hartley
Journal of Central Nervous System Disease , 2012, DOI: 10.4137/JCNSD.S4103
Abstract: Recent advances in the understanding of circadian rhythms have led to an interest in the treatment of major depressive disorder with chronobiotic agents. Many tissues have autonomous circadian rhythms, which are orchestrated by the master clock, situated in the suprachiasmatic nucleus (SNC). Melatonin (N-acetyl-5-hydroxytryptamine) is secreted from the pineal gland during darkness. Melatonin acts mainly on MT1 and MT2 receptors, which are present in the SNC, regulating physiological and neuroendocrine functions, including circadian entrainment, referred to as the chronobiotic effet. Circadian rhythms has been shown to be either misaligned or phase shifted or decreased in amplitude in both acute episodes and relapse of major depressive disorder (MDD) and bipolar disorder. Manipulation of circadian rhythms either using physical treatments (such as high intensity light) or behavioral therapy has shown promise in improving symptoms. Pharmacotherapy using melatonin and pure melatonin receptor agonists, while improving sleep, has not been shown to improve symptoms of depression. A novel antidepressant, agomelatine, combines 5HT2c antagonist and melatonin agonist action, and has shown promise in both acute treatment of MDD and in preventing relapse.
Mapping the climate: guidance on appropriate techniques to map climate variables and their uncertainty
N. R. Kaye, A. Hartley,D. Hemming
Geoscientific Model Development (GMD) & Discussions (GMDD) , 2012, DOI: 10.5194/gmd-5-245-2012
Abstract: Maps are a crucial asset in communicating climate science to a diverse audience, and there is a wealth of software available to analyse and visualise climate information. However, this availability makes it easy to create poor maps as users often lack an underlying cartographic knowledge. Unlike traditional cartography, where many known standards allow maps to be interpreted easily, there is no standard mapping approach used to represent uncertainty (in climate or other information). Consequently, a wide range of techniques have been applied for this purpose, and users may spend unnecessary time trying to understand the mapping approach rather than interpreting the information presented. Furthermore, communicating and visualising uncertainties in climate data and climate change projections, using for example ensemble based approaches, presents additional challenges for mapping that require careful consideration. The aim of this paper is to provide background information and guidance on suitable techniques for mapping climate variables, including uncertainty. We assess a range of existing and novel techniques for mapping variables and uncertainties, comparing "intrinsic" approaches that use colour in much the same way as conventional thematic maps with "extrinsic" approaches that incorporate additional geometry such as points or features. Using cartographic knowledge and lessons learned from mapping in different disciplines we propose the following 6 general mapping guidelines to develop a suitable mapping technique that represents both magnitude and uncertainty in climate data: – use a sensible sequential or diverging colour scheme; – use appropriate colour symbolism if it is applicable; – ensure the map is usable by colour blind people; – use a data classification scheme that does not misrepresent the data; – use a map projection that does not distort the data – attempt to be visually intuitive to understand. Using these guidelines, we suggest an approach to map climate variables with associated uncertainty, that can be easily replicated for a wide range of climate mapping applications. It is proposed this technique would provide a consistent approach suitable for mapping information for the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC AR5). Citation: Kaye, N. R., Hartley, A., and Hemming, D.: Mapping the climate: guidance on appropriate techniques to map climate variables and their uncertainty, Geosci. Model Dev., 5, 245-256, doi:10.5194/gmd-5-245-2012, 2012.
Mapping the climate: guidance on appropriate techniques to map climate variables and their uncertainty
N. R. Kaye,A. Hartley,D. Hemming
Geoscientific Model Development Discussions , 2011, DOI: 10.5194/gmdd-4-1875-2011
Abstract: Maps are a crucial asset in communicating climate science to a diverse audience, and there is a wealth of software available to analyse and visualise climate information. However, this availability makes it easy to create poor maps as users often lack an underlying cartographic knowledge. Furthermore, communicating and visualising uncertainties in climate data and climate change projections, using for example ensemble based approaches, presents additional challenges for mapping that require careful consideration. This paper assesses a range of techniques for mapping uncertainties, comparing "intrinsic" approaches that use colour in much the same way as conventional thematic maps, and "extrinsic" approaches that incorporate additional geometry such as points or features. We proposes that, unlike traditional cartography, where many known standards allow maps to be interpreted easily, there is no standard mapping approach used to represent uncertainty (in climate or other information). Consequently, a wide range of techniques have been applied for this purpose, and users may spend unnecessary time trying to understand the mapping approach rather than interpreting the information presented. We use cartographic knowledge and lessons learned from mapping other information to propose a suitable mapping technique that represents both magnitude and uncertainty in climate data. This technique adjusts the hue of a small palette of colours to show the mean or median of a climate variable, and the saturation of the colour to illustrate a measure of uncertainty. It is designed to be easy to replicate, visible to colour blind people and intuitive to understand. This technique may be utilised to map a wide range of climate data, and it is proposed that it would provide a consistent approach suitable for mapping information for the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC AR5).
Perissomyrmex Snyderi (Hymenoptera: Formicidae) is Native toCentral America and Exhibits Worker Polymorphism
J. T. Longino,D. A. Hartley
Psyche , 1994, DOI: 10.1155/1994/15747
Abstract:
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