997 resultados para (modified) reflection equation algebra


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Introduction: self-medication has become a growing practice in the world population. This phenomenon has been promoted as a form of self-care, with a positive impact on reducing spending in health systems, however there is concern about the potential negative effects related to inadequate diagnosis and treatment, which can affect health of individuals. This dual perception of the phenomenon is partly related to a variety of terms and concepts used, that make difficult its theoretical and empirical approach. Harmonization of the definitions involved is required in order to make adequate epidemiological comparisons. Objectives: analyze the concept of self medication and related terms from the definitions in the literature of the subject. Conclusions: in the last four decades it has been an evolution of both the wording and the definitions related to self-medication, from a very simple concept that implies the absence of prescription, to more complex ones that encompass very diverse behaviors, even those mediated by an act of prescription but not followed or not completed by the patient. Additionally the conceptual proliferation seen, justify the ordering of the terms related to self-medication. This paper presents a proposal for classification in four groups: a. self-medication, b. self care, c. pharmaceutical preparations and medicines, and d. prescription. This proposal should facilitate the exploration and analysis of the phenomenon and allow future theoretical approaches.

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Through the study of the relationship between non-state actors and states, is pretended to analyze the role of Al-Qaeda in international politics. It is argued that Al-Qaeda tries or has the ability to promote or accelerate changes in the power  structure, where stands the American hegemony and the pursuit of balance by  various actors, implementing asymmetric strategies as counter-hegemonic responses.

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In order to present an estimation of the Internal Rate of Return (IRR) to higher education in Colombia we take advantage of the methodological approach provided by Heckman, Lochner and Todd (2005). Trying to overcome the criticism that surrounds interpretations of the education coefficient of Mincer equations as being the rate of return to investments in education we develop a more structured approach of estimation, which controls for selection bias, includes more accurate measures of labor income and the role of education costs and income taxes. Our results implied a lower rate of return than the ones found in the Colombian literature and show that the Internal Rate of Return for higher education in Colombia lies somewhere between 0.074 and 0.128. The results vary according to the year analyzed and individual’s gender. This last result reinforces considerations regarding gender discrimination in the Colombian labor market.

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Se presentan dos investigaciones sobre la enseñanza y el aprendizaje de la integral definida y la integral impropia. Se destacan los aspectos relacionados con el uso de los CAS (Computer Algebra System) Derive y Maple. Se hace incapié en el papel que ha jugado cada uno de ellos en la investigación.

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El álgebra esta reconocida como una parte difícil del currículo de matemáticas; sin embargo, la comprensión del álgebra es clave en las matemáticas en general. El propósito de este recurso es explorar los problemas y las posibilidades de enseñanza y aprendizaje del álgebra, y mirar algunas de las dificultades que los estudiantes suelen tener. Sugiere distintos enfoques en la enseñanza y el aprendizaje de las ideas clave.

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Existe un ejemplar en lengua valenciana con el título: Algebra.Gràfiques : activitats per als-els alumnes de matemàtiques. ISBN: 84-482-0410-7

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Existe un ejemplar en lengua valenciana con el título: Algebra.Gràfiques : activitats per a l'alumnat de matemàtiques. ISBN: 84-482-0441-7

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The front speed of the Neolithic (farmer) spread in Europe decreased as it reached Northern latitudes, where the Mesolithic (huntergatherer) population density was higher. Here, we describe a reaction diffusion model with (i) an anisotropic dispersion kernel depending on the Mesolithic population density gradient and (ii) a modified population growth equation. Both effects are related to the space available for the Neolithic population. The model is able to explain the slowdown of the Neolithic front as observed from archaeological data

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The evaluation appears as a natural process in which a professional education to build a notion of content assimilated by the students as well as whether the teaching methods adopted by him are having an effect on learning of these. Long meant, to apply only to evaluate evidence, a grade and classify students in approved and disapproved. Even today there are teachers who believe that assessment is only in this process. However, this vision has been gradually modified. The evaluation is not at the time of carrying out tests and checks, but is an ongoing process, aimed at reflection for error correction and forwarding the student to acquire the expected objectives. This study was designed to analyze the data from the result of the survey, we can see that the form evaluative functions as an element of integration and motivation for the teaching-learning process. The speech of most education professionals interviewed here reflects the current notion that the evaluation process is currently understood not only as the result of the tests, but the results of the work and / or research that students perform. There are numerous evaluative techniques that allow the teacher to evaluate student performance and escape the traditional written exam, allowing teachers and students to dialogue sought to find and correct possible errors by redirecting the student for learning, motivating for the correction, and suggesting to him new ways of study for better understanding of the issues addressed within the class. The key is to understand that the evaluation process is not just about taking exams and assign grade. Evaluation is a continuous learning process that occurs every day in order to correct mistakes and build new knowledge.

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In the present text we intend to analyse 5 basic documents that translate the Museological Thinking in our century and that, chiefly, have led professionals of the area to apply this “science” in a less hermetic way and to understand its practice. The option to study and analyse the documents results from the fact that they influence present day museological practice and thinking. It is impossible to speak of museology nowadays without referring to one of these documents, not to mention a few nations that have even modified and/or created specific laws for the management of their preservationist cultural policy. Anyway, we are aware that this text intends only to carry out a preliminary approach to the documents, in the sense that the wealth of its content would allow us to slowx over an infinity of issues that they raise. I specifically refer to the documents produced at UNESCO Regional Seminar on the Role of Museums in Education, which took place in Rio de Janeiro in 1958; at the Santiago Round Table in 1972, in Chile; at the 1rst New Museology International Workshop, in Quebec, Canada, 1984; at the Oaxtepec Meeting, in Mexico 1984; and at the Caracas Meeting in 1992. These are documents elaborated within the ICOM –International Council of Museums. These documents are the result of a joint reflection by professionals who seek the evolution of ideas within their areas of action, recognising that in order to do so it is necessary to leave the cocoon of the museological institutions and try to discuss their conceptual advances with professionals of related areas. It is important to be capacitated to reuse these advances in their areas of action. This is the recognition of the importance of interdisciplinarity for the museological context.