1,049 research outputs found

    Costly capital reallocation and energy use

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    In time series data, energy use does not change much with energy price changes. However, energy use is responsive to international differences in energy prices in cross-section data across countries. In this paper we consider a model of energy use in which production takes place at individual plants and capital can be used either to directly produce output or to reduce the energy required to run the planto We assume that reallocating capital from one use to another is costly. This turns out to be crucial for the quantitative properties of the model to be in conformity with the low short-mn and high long-run elasticities of energy use seen in data. Furthermore, our model displays variations in capacity utilization that are in line with those observed during the period of major oil price increases.Energy price, Energy use, Costly capital reallocation, Number of plants.

    COSTLY CAPITAL REALLOCATION AND ENERY USE

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    In time series data, energy use does not change much with energy price changes. However, energy use is responsive to international differences in energy prices in cross-section data across countries. In this paper we consider a model of energy use in which production takes place at individual plants and capital can be used either to directly produce output or to reduce the energy required to run the plant. We assume that reallocating capital from one use to another is costly. This turns out to be crucial for the quantitative properties of the model to be in conformity with the low short-run and high long-run elasticities of energy use seen in data.Energy Price; Energy Use; Costly Capital Reallocation

    What is human biology?

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    En este micro-artículo se reflexiona sobre la biología humana. Para abordar a una definición de la disciplina, se proponen respuestas a diferentes preguntas-guía: ¿es una ciencia la biología humana? Si así fuera, ¿es una ciencia social o una ciencia natural? ¿Cuál es su objeto de estudio? ¿Cómo analiza su objeto de estudio? ¿Por qué se la incluye en el currículo de las carreras de grado, de Licenciatura y Profesorado en Psicología? Luego de tratar estos asuntos, se propone que la biología humana es un ámbito adecuado desde el que desarrollar investigaciones interdisciplinarias congruentes con el paradigma de la complejidad, actualmente vigente. Finalmente, se aboga por una formación del psicólogo que convoque a la interdisciplina y que integre en la situación de enseñanza y aprendizaje campos conceptuales de distintas disciplinas.Este microartigo reflete sobre a biologia humana. Para abordar uma definição da disciplina, são propostas respostas a diferentes questões orientadoras: a biologia humana é uma ciência? Se sim, é uma ciência social ou uma ciência natural? Qual é seu objeto de estudo? Como analisa seu objeto de estudo? Por que está incluído no currículo dos programas de graduação, pós-graduação e formação de professores em psicologia? Após abordar estas questões, propõe-se que a biologia humana é um campo adequado para desenvolver pesquisas interdisciplinares coerentes com o paradigma da complexidade, atualmente em vigor. Por fim, advoga-se por uma formação do psicólogo que exija interdisciplinaridade e que se integre na situação de ensino e aprendizagem de campos conceituais de diferentes disciplinas.This micro-article reflects on human biology. In order to approach a definition of the discipline, answers are proposed to different guiding questions: is human biology a science? If so, is it a social science or a natural science? What is its object of study? How does it analyze its object of study? Why is it included in the curriculum of undergraduate, graduate, and teacher training programs in psychology? After addressing these issues, it is proposed that human biology is an adequate field from which to develop interdisciplinary research consistent with the paradigm of complexity, currently in force. Finally, it is advocated for a training of the psychologist that calls for interdiscipline and that integrates in the situation of teaching and learning conceptual fields of different disciplines.Facultad de Psicologí

    O que é a biologia humana?

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    This micro-article reflects on human biology. In order to approach a definition of the discipline, answers are proposed to different guiding questions: is human biology a science? If so, is it a social science or a natural science? What is its object of study? How does it analyze its object of study? Why is it included in the curriculum of undergraduate, graduate, and teacher training programs in psychology? After addressing these issues, it is proposed that human biology is an adequate field from which to develop interdisciplinary research consistent with the paradigm of complexity, currently in force. Finally, it is advocated for a training of the psychologist that calls for interdiscipline and that integrates in the situation of teaching and learning conceptual fields of different disciplines. En este micro-artículo se reflexiona sobre la biología humana. Para abordar a una definición de la disciplina, se proponen respuestas a diferentes preguntas-guía: ¿es una ciencia la biología humana? Si así fuera, ¿es una ciencia social o una ciencia natural? ¿Cuál es su objeto de estudio? ¿Cómo analiza su objeto de estudio? ¿Por qué se la incluye en el currículo de las carreras de grado, de Licenciatura y Profesorado en Psicología? Luego de tratar estos asuntos, se propone que la biología humana es un ámbito adecuado desde el que desarrollar investigaciones interdisciplinarias congruentes con el paradigma de la complejidad, actualmente vigente. Finalmente, se aboga por una formación del psicólogo que convoque a la interdisciplina y que integre en la situación de enseñanza y aprendizaje campos conceptuales de distintas disciplinas. Este microartigo reflete sobre a biologia humana. Para abordar uma definição da disciplina, são propostas respostas a diferentes questões orientadoras: a biologia humana é uma ciência? Se sim, é uma ciência social ou uma ciência natural? Qual é seu objeto de estudo? Como analisa seu objeto de estudo? Por que está incluído no currículo dos programas de graduação, pós-graduação e formação de professores em psicologia? Após abordar estas questões, propõe-se que a biologia humana é um campo adequado para desenvolver pesquisas interdisciplinares coerentes com o paradigma da complexidade, atualmente em vigor. Por fim, advoga-se por uma formação do psicólogo que exija interdisciplinaridade e que se integre na situação de ensino e aprendizagem de campos conceituais de diferentes disciplinas.&nbsp

    Systematic Study of the Content of Phytochemicals in Fresh and Fresh-Cut Vegetables

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    Vegetables and fruits have beneficial properties for human health, because of the presence of phytochemicals, but their concentration can fluctuate throughout the year. A systematic study of the phytochemical content in tomato, eggplant, carrot, broccoli and grape (fresh and fresh-cut) has been performed at different seasons, using liquid chromatography coupled to triple quadrupole mass spectrometry. It was observed that phenolic acids (the predominant group in carrot, eggplant and tomato) were found at higher concentrations in fresh carrot than in fresh-cut carrot. However, in the case of eggplant, they were detected at a higher content in fresh-cut than in fresh samples. Regarding tomato, the differences in the content of phenolic acids between fresh and fresh-cut were lower than in other matrices, except in winter sampling, where this family was detected at the highest concentration in fresh tomato. In grape, the flavonols content (predominant group) was higher in fresh grape than in fresh-cut during all samplings. The content of glucosinolates was lower in fresh-cut broccoli than in fresh samples in winter and spring sampling, although this trend changes in summer and autumn. In summary, phytochemical concentration did show significant differences during one-year monitoring, and the families of phytochemicals presented different behaviors depending on the matrix studied

    Semantics for incident identification and resolution reports

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    In order to achieve a safe and systematic treatment of security protocols, organizations release a number of technical briefings describing how to detect and manage security incidents. A critical issue is that this document set may suffer from semantic deficiencies, mainly due to ambiguity or different granularity levels of description and analysis. An approach to face this problem is the use of semantic methodologies in order to provide better Knowledge Externalization from incident protocols management. In this article, we propose a method based on semantic techniques for both, analyzing and specifying (meta)security requirements on protocols used for solving security incidents. This would allow specialist getting better documentation on their intangible knowledge about them.Ministerio de Economía y Competitividad TIN2013-41086-

    Thought Control Questionnaire (TCQ): psychometric properties of the Portuguese (Portugal) version

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    The Thought Control Questionnaire (TCQ) assesses the strategies to control intrusive thoughts. In the present study we evaluated the factorial structure using confirmatory factor analysis (CFA) to analyze its reliability. We also analyzed the convergent and divergent validity. A sample of 558 participants from the Portuguese community replied the TCQ, the Revised Intrusions Inventory, the White Bear Suppression Inventory, the Penn State Worry Questionnaire and the Maudsley Obsessive-Compulsive Inventory. The CFA showed that the original five-factor model (Wells and Davies, 1994) produced an acceptable fit. However, fifteen items obtained factor loadings less than .40, whereby its reformulation would be advisable. The TCQ provided adequate levels of reliability and validity

    Rurality and nutritional status: A study in the magdalena population (province of Buenos Aires, Argentina)

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    En Argentina, la “ruralidad” es definida comúnmente como “aquello que no es urbano” empleando diferentes criterios i.e. geográficos o estadísticos. El objetivo es analizar el estado nutricional en relación a las características socio-ambientales en que residen los niños de Magdalena (Buenos Aires, Argentina). Se realizó un estudio transversal en 428 escolares de 3.0 a 14.9 años asistentes a establecimientos de diferentes localidades categorizados como rurales por el Consejo Escolar. Se relevó peso (P) y talla (T) y calculó Índice de Masa Corporal (IMC). Las prevalencias de Bajo Peso/Edad (BPE), Baja Talla/Edad (BTE), Bajo IMC (BIMC), Sobrepeso (S) y Obesidad (O) fueron calculadas empleando la referencia OMS. Las variables socio-ambientales fueron relevadas mediante una encuesta estructurada. Los datos fueron analizados mediante análisis de componentes principales categórico y permitieron caracterizar a la población y diferenciarla en dos grupos. Las prevalencias generales de exceso de peso (29.8%: S 17.2%, O 12.6%) superaron 5 veces a la desnutrición (6.7%: BPE 1.6%, BTE 4.4%, BIMC 0.7%). La regresión indicó mayor probabilidad de obesidad en varones del grupo más urbano (1: 21.6%, 2: 9.80%). Se concluye que en el ambiente rural heterogéneo, el estado nutricional de los niños difiere.In Argentina, “rurality” is commonly defined as “that is not urban” based on the employment of different criteria i.e. geographical or statistical. The aim is to analyze, the nutritional status in relation to the socio-environmental characteristics of residence of children inhabiting in Magdalena (Buenos Aires, Argentina). A cross-sectional study was carried out in 428 students aged between 3.0 and 14.9 years attending to schools of different localities categorized as rural by the School Council. Weight (W) and height (H) were measured and Body Mass Index (BMI) was calculated. Prevalence of low weight-for-age (LWA), low height-for-age (LHA) and low BMI (LBMI), Overweight (O) and Obesity (OB) were estimated using WHO reference. The socio-environmental variables were surveyed using structured questioner and the data were analyzed by means of categorical principal component analysis. The results allowed to characterize the population and to differentiate two groups. Overall prevalence of excess of weight (29.8%: O 17.2%, OB 12.6%) exceeded 5 times undernutrition (6.7%: LWA 1.6%, LHA 4.4%, LBMI 0.7%). The regression analysis indicated a greater probability of obesity in males among the more urban group (1: 21.6%, 2: 9.80%). It is concluded that in the heterogeneous “rural” environment, the nutritional status of children differs.Fil: Torres, María Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Luis, María Antonia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; ArgentinaFil: Garraza, Mariela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; ArgentinaFil: Oyhenart, Evelia Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentin

    COSTLY CAPITAL REALLOCATION AND ENERGY USE

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    In thime series data, energy use does not change much with energy price changes. However, energy use is responsive to international differences in energy prices in cross-section data across countries. In this paper we consider a model of energy use in which production takes place at individual plants and capital can be used either to directly produce output or to reduce toe energy required to run the plant. We assume that reallocating capital from one use to another is costly. This turns out to be crucial for the quantitative properties of the model to be in conformity with the low short-run and high long-run elasticities of energy use seen in data. Furthermore, our model displays variations in capacity utilization that are in line with those observed during the period of major oil price increases.
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