Hace tan solo unos ciento sesenta años que la denominada cultura olmeca salió a la luz. En la historia de la definición de su estilo artístico ocupa un lugar destacado el artista mexicano Miguel Covarrubias. En el artículo realizamos un análisis pormenorizado de su obra, intentando mostrar la evolución de sus ideas artísticas y la importancia que tuvieron a la hora de configurar lo que hoy se denomina «estética olmeca». Se analizan sus presupuestos teóricos y la enorme influencia que (...) sus tesis tienen, aun hoy, a la hora de analizar la que muchos consideran la «cultura madre» de Mesoamérica. (shrink)

For a standard Finsler F on a manifold M, the domain is the whole tangent bundle T M and the fundamental tensor g is positive-definite. However, in many cases, these two conditions hold in a relaxed form only, namely one has either a psuedo-Finsler metric or a conic Finsler metric. Our aim is twofold. First, we want to give an account of quite a few subtleties that appear under such generalizations, say, for conic pseudo-finsler metrics. Second, we aim to provide (...) some criteria that determine when a pseudo-Finsler metric F obtained as a general homogeneous combination of Finsler metrics and one-forms is again a Finsler-metric -- or, more precisely, that the conic domain on which g remains positive-definite. Such a combination generalizes the known -metrics in different directions. Remarkably, classical examples of Finsler metrics are reobtained and extended, with explicit computations of their fundamental tensors. (shrink)

El siguiente monográfico sobre Perú acoge diferentes reflexiones y aportaciones de un total de nueve trabajos que buscan problematizar y arrojar luz sobre algunos aspectos que han acompañado al proceso de construcción democrática que el país ha venido experimentando desde 1980. Como otros escenarios de la región, la democracia se erige tras décadas convulsas para un sistema político cooptado por elites caudillistas, encono político, intromisión militar y condiciones estructurales irresolutas. Este conjunto de factores, inscritos en un contexto de guerra fría, (...) y al albor de la revolución cubana, inspiró movimientos guerrilleros a inicios de los sesenta, como el Ejército de Liberación Nacional o el Movimiento de Izquierda Revolucionaria. Su escasa relevancia nada tendría que ver con la fuerza disruptiva que experimentaría el Partido Comunista del Perú - Sendero Luminoso. Un grupo armado de marcada impronta maoísta que, si bien hunde sus raíces en la ruptura sino-soviética de 1962, construye sus fundamentos ideológicos y sus bases revolucionarias durante la década de los setenta. (shrink)

Los centros penitenciarios poseen módulos educativos donde se procura dotar de enseñanza reglada a los internos para favorecer su reinserción, como se recoge en la Constitución Española de 1978 así como en los decretos de Enseñanza Secundaria para personas adultas. En este marco, se ofrece aquí una propuesta educativa para desarrollar un tema controvertido, como es el del Holocausto, en un ámbito educativo especialmente sensible a procesos educativos en situaciones de confinamiento, un aula de 4º de ESPA en un centro (...) penitenciario, a través del conocimiento de las responsabilidades criminales consideradas en los Juicios de Núremberg. Utilizando la representación dramática como recurso didáctico, ya que los internos tendrían que reproducir los distintos roles de los participantes en los juicios, se pretende, en las diferentes sesiones en las que está estructurada esta propuesta, tratar de las responsabilidades morales, entender la necesaria existencia de unas instituciones fuertes con códigos de convivencia adecuados y desarrollar la empatía con las víctimas del régimen nazi, con el objetivo de que sean desarrollados valores cívicos entre los internos. (shrink)

This article states that research in skill acquisitionand executionhas underestimated the relevance of some features of attention. We present and theoretically discuss two essential features of attention that have been systematically overlooked in the research of skill acquisitionandexecution. First, attention alters the appearance of the perceived stimuli in an essential way; and second, attention plays a fundamental role in action, being crucial for solving the so called ’many-many problem’, that is to say, the problem of generating a coherent behavior byselecting (...) between many inputs and many potential outputs. We discuss the importance of these features for skill acquisition in sport. We also suggest empirical ways to assess the precise impact of taking them into consideration and at the same time we propose important implications for training derived from the ideas discussed in the paper. (shrink)

El objetivo de este artículo es ofrecer una perspectiva histórico-filosófica del idealismo y el Romanticismo. La estrategia que emplearemos en esta investigación consiste en analizar dichas corrientes intelectuales a partir del problema, propio de la Modernidad filosófica, de incorporar la libertad dentro de la estructura de la subjetividad humana. El idealismo y el Romanticismo surgieron gracias a la influencia que ejerció el espíritu libre de la Revolución francesa. El espacio donde se desarrolló esta revolución cultural alemana fue el Círculode Jena, (...) un grupo que concentró a muchos de los intelectuales más influyentes en la historia de la filosofía y la literatura. Y fueron las ideas de Immanuel Kant —en específico, con los temas referentes a la apercepción (Yo pienso), la libertad y el genio— la influencia más determinante para los idealistas y losrománticos. (shrink)

Histamine is a multifunctional biogenic amine with relevant roles in intercellular communication, inflammatory processes and highly prevalent pathologies. Histamine biosynthesis depends on a single decarboxylation step, carried out by a PLP-dependent histidine decarboxylase activity (EC 4.1.1.22), an enzyme that still remains to be fully characterized. Nevertheless, during the last few years, important advances have been made in this field, including the generation and validation of the first three-dimensional model of the enzyme, which allows us to revisit previous results and conclusions. (...) This essay provides a comprehensive review of the current knowledge of the structural and functional characteristics of mammalian histidine decarboxylase. BioEssays 27:57–63, 2005. © 2004 Wiley Periodicals, Inc. (shrink)

In the Metaphysics, especially in Book X, are drawn the general lines of a henology. For the proper understanding of this doctrine it is necessary to reconstruct its argumentation from two fundamental basis: (1) the guide of puzzles or aporias that book III provides and (2) the ontological project announced in book IV where the relationship between ontology and henology is indicated. The fundamental feature of Aristotle's henology is that is a subordinate part of ontology. The role of henology is (...) for Aristotle primarily destructive, that is, with this doctrine it is intended to establish the impossibility of considering the ‘one’ (τὸ ἓν) as a principle of the entities. (shrink)

In a previous essay we demonstrated that quantum mechanical formalism is incompatible with some necessary principles of the mechanism conception still dominant in the physicist’s community. In this paper we show, based on recent empirical evidence in quantum physics, the inevitability of abandoning the old mechanism conception and to construct a new one in which physical reality is seen as a representation which refers to relations established through operations made by us in a world that we are determining. This change (...) is profound and radical, with immediate consequences on both Ontology and Epistemology. This work is our contribution to try to make more concrete how this new conception of the world might be. (shrink)

John Locke's philosophy was deeply affected by medicine of his times. It was specially influenced by the medical thought and practice of Thomas Sydenham. Locke was a personal friend of Sydenham, expressed an avid interest in his work and shared his views and methods. The influence of Sydenham's medicine can be seen in the following areas of Locke's philosophy: his “plain historical method”; the emphasis on observation and sensory experience instead of seeking the essence of things; the rejection of hypotheses (...) and principles; the refusal of research into final causes and inner mechanisms; the ideal of irrefutable evidence and skepticism on the possibilities of certainty in science. The science which for Locke held the highest paradigmatic value in his theory of knowledge was precisely medicine. To a great extent, Locke's Essay on Human Understanding can be understood as an attempt to justify, substantiate, and promote Sydenham's medical method. This method, generalized, was then proposed as an instrument for the elaboration of all natural sciences. (shrink)

We support the development of non-reductive cognitive science and the naturalization of phenomenology for this purpose, and we agree that the ‘relational turn’ defended by Gallagher is a necessary step in this direction. However, we believe that certain aspects of his relational concept of nature need clarification. In particular, Gallagher does not say whether or how teleology, affect, and other value-related properties of life and mind can be naturalized within this framework. In this paper, we argue that (1) given the (...) phenomenological standards recognized by Gallagher, his commitment to a naturalized phenomenology should entail a commitment to a naturalized concept of value; and (2) the kind of ‘relational nature’ described by Gallagher in his paper is insufficient for this purpose. (shrink)

In this work, the evolution of demographic and health patterns in a Basque rural population from Spain is analysed, as they relate to progress in demographic and epidemiological transition. For this purpose, parochial record data on 13,298 births and 9215 deaths, registered during the 19th and 20th centuries (180090) resulting from cardiovascular diseases and malignant neoplasms (post-transition causes). This last point is in contrast with observations from the first four decades of the 20th century, when infectious diseases and respiratory ailments (...) were determining factors in mortality among this population. The data provided by the study of the variation over time in demographic and health patterns indicate that reducing the risk of mortality is one of the most important preconditions for fertility decline. (shrink)

The focus of this work is the analysis of changes in completed family size and possible determinants of that size over time, in an attempt to characterize the evolution of reproductive patterns during the demographic transition. With this purpose in mind, time trends are studied in relation to the mean number of live births per family (as an indirect measure of fertility), using family reconstitution techniques to trace the reproductive history of each married woman. The population surveyed is a Spanish (...) rural community called Lanciego, located at the southern end of the province of Alava (Basque Country). A total of 24,510 parish records of baptisms, marriages and burials made between 1800 and 1969 were examined to obtain the demographic data set. For each reconstituted family, the variables included in the study were the number of live births per family or family size (FAMS), year of marriage (YEAR), age at marriage of both partners (AMAN, AWOM), wife’s age at the end of marriage (WEND), duration of marriage (MARD), age at first maternity (A1CH), length of reproductive span (REPS) and number of children dying before their first anniversary (MINF). Through a principal component analysis, three factors were found that explained more than 75% of the total variance. Association of variables in factors I and III was particularly useful in characterizing the variability of mean family size in pre-transitional, transitional and post-transitional cohorts. During demographic transition, a decreasing trend is observed in the variables FAMS, REPS and MINF, while variables AWOM, AMAN, WEND and A1CH show a tendency to increase over the 20th century. Results obtained by multiple regression analysis confirm that the best predictors of family size (dependent variable) were REPS and MINF, which between them explained over 85% of the total variation in FAMS (R2=0·853). In Lanciego, birth control seems to be present on the evidence of an increase in age at first maternity and a decrease in age at last parturition, indicating that the beginning of the reproductive span is delayed and its end is brought forward. Interaction between family size and infant mortality is discussed in the light of various hypotheses, including replacement of descendants, the so-called biological effect and the theory of r and k selection. (shrink)

¿Quiénes son los laicos en la Iglesia? ¿Encajan en la estructura de la vida religiosa? Este artículo intenta responder a estas preguntas analizando el significado como la teoría y connotaciones prácticas de los legos para la vida del Inspectoría Salesiana de Córdoba (España) después del Concilio.

Las aminas biógenas son compuestos nitrogenados de pequeño tamaño con actividad biológica que se forman por la descarboxilación enzimática de ciertos aminoácidos. Las aminas biógenas se encuentran presentes en todos los seres vivos, en los que participan en procesos biológicas de gran importancia. Sin em­bargo, debido al metabolismo de algunos microorganismos, estos compuestos se pueden acumular en alimentos en concentraciones elevadas, constituyendo un riesgo para la salud de los consumido­res. Para que las aminas biógenas alcancen estas concentraciones elevadas en los (...) alimentos se requiere, como condición indispensa­ble, la presencia de microrganismos productores, por lo que se han desarrollado diferentes métodos para detectar la presencia de los mismos. Entre estos métodos, aquellos basados en técnicas inde­pendientes de cultivo, como la PCR, presentan ventajas como su gran especificidad, el hecho de ser rápidos y de fácil realización, y que en muchos casos ni siquiera es necesario un tratamiento previo de la muestra, lo que facilita su incorporación a las plantas de elabo­ración. En este trabajo se describen algunos de los métodos dispo­nibles en la actualidad para la detección de microorganismos pro­ductores de aminas biógenas, así como sus posibles aplicaciones. (shrink)

It could be a part of the task of analyzing the history of the World the analysis of the history of rock. Such analysis could take us into a journey and an experience of unexpected paths of wealth and intricate course. Who follows such paths surely will face much more than mere lyrics, costumes, instruments, chords and musical rhythms. That wanderer better be prepared to confront memories and denounces of war, energetic crisis, works of art and a manifold of manifestations (...) of social and political consciousness. Who travel these paths will live fully the experience if submerges him in an alternative and very promising way of meeting the universal history of the last fifty years. This way of understanding history is all about assuming rock as a soundtrack of the multiple features that is the world. In a few words, rock is a key of interpretation of history. (shrink)

A processualistic approach is offered in the study of that thinking giving rise to modernism from the historical cultural context in which the phenomenon has arisen and evolves. Built upon two opposing forces, it has collapsed after various centuries of development. Modernism is thus called to heroism and must regenerate, availing itself of its best of qualities: critical thinking, reflection and rational dialogue.

This article evaluates the potential role of advance directives outside of their original North American context. In order to do this, the article first analyses the historical process which has promoted advance directives in recent years. Next, it brings to light certain presuppositions which have given them force: atomistic individualism, contractualism, consumerism and entrepreneurialism, pluralism, proceduralism, and American moralism. The article next studies certain European cultural peculiarities which could affect advance directives: the importance of virtue versus rights, stoicism versus consumerist (...) utilitarianism, rationalism versus empiricism, statism versus citizens' initiative, and justice versus autonomy.The article concludes by recognising that autonomy has a transcultural value, although it must be balanced with other principles. Advance Directives can have a function in certain cases. But it does not seem adequate to delegate to advance directives more and more medical decisions, and to make them more binding everyday. It is indispensable to develop other decision-making criteria. (shrink)

Membership in voluntary organizations is associated with individual and social benefits. Due to the negative consequences of the global pandemic on older people, and the governmental challenges posed by population aging, voluntary membership is of great importance to society. To effectively promote volunteering among older people, it is necessary to understand the determinants of voluntary membership. This study analyses the influence of individual values—secular/traditional and survival/self-expression–on voluntary membership among European adults. Specifically, it examines which values orient two age groups, as (...) well as men and women toward a certain type of association. The sample of 31,985 comprises 60% of adults aged 50–64 and 40% aged 65–79; of which 56% are women and 44% men. The empirical estimation considers different levels of data aggregation: individual, national and welfare system, therefore multilevel analysis is used as an analytical strategy. Individual-level variables from the Integrated Values Survey and national-level variables from the World Bank and Eurostat are used. The results indicate that traditional and self-expression values promote membership in voluntary organizations in general more than secular and survival values. However, there are differences according to the type of organization. Furthermore, values are found to moderate the effect of age and gender on voluntary membership. (shrink)