970 resultados para modular languages


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The cis-regulatory systems that control developmental expression of two sea urchin genes have been subjected to detailed functional analysis. Both systems are modular in organization: specific, separable fragments of the cis-regulatory DNA each containing multiple transcription factor target sites execute particular regulatory subfunctions when associated with reporter genes and introduced into the embryo. The studies summarized here were carried out on the CyIIIa gene, expressed in the embryonic aboral ectoderm and on the Endo16 gene, expressed in the embryonic vegetal plate, archenteron, and then midgut. The regulatory systems of both genes include modules that control particular aspects of temporal and spatial expression, and in both the territorial boundaries of expression depend on a combination of negative and positive functions. In both genes different regulatory modules control early and late embryonic expression. Modular cis-regulatory organization is widespread in developmentally regulated genes, and we present a tabular summary that includes many examples from mouse and Drosophila. We regard cis-regulatory modules as units of developmental transcription control, and also of evolution, in the assembly of transcription control systems.

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A new set of European genetic data has been analyzed to dissect independent patterns of geographic variation. The most important cause of European genetic variation has been confirmed to correspond to the migration of Neolithic farmers from the area of origin of agriculture in the Middle East. The next most important component of genetic variation is apparently associated with a north-south gradient possibly due to adaptation to cold climates but also to the differentiation of the Uralic and the Indo-European language-speaking people; however, the relevant correlations are not significantly different from zero after elimination of the spatial autocorrelation. The third component is highly correlated with the infiltration of the Yamna ("Kurgan") people, nomadic pastoralists who domesticated the horse and who have been claimed to have spread Indo-European languages to Europe; this association, which is statistically significant even when taking spatial autocorrelations into account, does not completely exclude the hypothesis of Indo-European as the language of Neolithic farmers. It is possible that both expansions were responsible for the spread of different subfamilies of Indo-European languages, but our genetic data cannot resolve their relative importance.

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En este artículo presentamos COMPENDIUM, una herramienta de generación de resúmenes de textos modular. Esta herramienta se compone de un módulo central con cinco etapas bien diferenciadas: i) análisis lingüístico; ii) detección de redundancia; iii) identificación del tópico; iv) detección de relevancia; y v) generación del resumen, y una serie de módulos adicionales que permiten incrementar las funcionalidades de la herramienta permitiendo la generación de distintos tipos de resúmenes, como por ejemplo orientados a un tema concreto. Realizamos una evaluación exhaustiva en dos dominios distintos (noticias de prensa y documentos sobre lugares turísticos) y analizamos diferentes tipos de resúmenes generados con COMPENDIUM (mono-documento, multi-documento, genéricos y orientados a un tema). Además, comparamos nuestro sistema con otros sistemas de generación de resúmenes actuales. Los resultados que se obtienen demuestran que la herramienta COMPENDIUM es capaz de generar resúmenes competitivos para los distintos tipos de resúmenes propuestos.

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The optimization of chemical processes where the flowsheet topology is not kept fixed is a challenging discrete-continuous optimization problem. Usually, this task has been performed through equation based models. This approach presents several problems, as tedious and complicated component properties estimation or the handling of huge problems (with thousands of equations and variables). We propose a GDP approach as an alternative to the MINLP models coupled with a flowsheet program. The novelty of this approach relies on using a commercial modular process simulator where the superstructure is drawn directly on the graphical use interface of the simulator. This methodology takes advantage of modular process simulators (specially tailored numerical methods, reliability, and robustness) and the flexibility of the GDP formulation for the modeling and solution. The optimization tool proposed is successfully applied to the synthesis of a methanol plant where different alternatives are available for the streams, equipment and process conditions.

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One of the most important factors of recognition, belonging and identification in scientific communities is their specialized language: doctors, mathematicians and anthropologists feel they are part of a group with which they can interact because they share a common “language”. While ideology is present in all academic registers, it is in human sciences where its presence (or absence) leads to more visible linguistic phenomena. An interesting example is that of lesbian studies: as non-heterosexual members of society have become less stigmatized, lesbian studies have developed a language of their own. In our paper, we shall explore the mechanisms used in the creation of specific vocabulary in this academic area, paying special attention to the refashioning or deconstruction of meaning of established terms as a result of changes in social perception or the challenging of pre-determined meanings.

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Este trabajo muestra cómo se realiza la enseñanza de robótica mediante un robot modular y los resultados educativos obtenidos en el Máster Universitario en Automática y Robótica de la Escuela Politécnica Superior de la Universidad de Alicante. En el artículo se describen los resultados obtenidos con el uso de este robot modular tanto en competencias genéricas como específicas, en las enseñanzas de electrónica, control y programación del Máster. En este artículo se exponen los objetivos de aprendizaje para cada uno de ellos, su aplicación a la enseñanza y los resultados educativos obtenidos. En los resultados del estudio, cabe destacar que el alumno ha mostrado mayor interés y ha fomentado su aprendizaje autónomo. Para ello, el robot modular se construyó con herramientas para fomentar este tipo de enseñanza y aprendizaje, tales como comunicaciones interactivas para monitorizar, cambiar y adaptar diversos parámetros de control y potencia del robot.

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Este trabajo presenta el diseño, construcción y programación de un robot modular para el desarrollo tanto de competencias genéricas como específicas, en las enseñanzas de electrónica, control y programación del Master de Automática y Robótica de la Escuela Politécnica Superior de la Universidad de Alicante. En este trabajo se exponen los diferentes módulos propuestos, así como los objetivos de aprendizaje para cada uno de ellos. Uno de los factores más importantes a destacar en el presente estudio es el posible desarrollo de la creatividad y el aprendizaje autónomo. Para ello, se desarrollará especialmente un módulo de comunicación por bluetooth que servirá para monitorizar, cambiar y adaptar on-line diversos parámetros de control y potencia del robot. Además, dicha herramienta se ha introducido como parte de la metodología en las asignaturas del Máster de Electromecánica y Sistemas de Control Automático. En esta memoria se mostrarán los distintos resultados obtenidos durante y en la finalización de este trabajo.

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This volume contains lectures delivered by Sewall to Harvard students. The first lecture in the volume, Lecture XV, was read on March 9, 1767; October 8, 1770, August 22, 1774, and December 13, 1778. The last lecture in the volume, Lecture XXVII, was read on June 13, 1768; May 4, 1772; July 29, 1776; and June 5, 1780.

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This volume contains lectures delivered by Sewall to Harvard students. The volume begins with a continuation of Lecture XIV from Volume 2. The first complete lecture in the volume, Lecture XXXIV, was delivered August 29, 1768; May 18, 1772; September 23, 1776; and June 19 1780. The last lecture in the volume, Lecture LV was delivered February 11, 1771, November 7, 1774, and May 31, 1779.

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The first lecture in this volume, Lecture LVI, was delivered on March 4, 1771; November 28, 1774; and June 14, 1779. The last lecture in the volume, Lecture LXXII was delivered in December 19, 1774; August 17, 1778; and September 16, 1782. The volume also contains a table of the variation of the magnetic needle observed at Cambridge from November 1796 to August 1797.

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This small 11-page pamphlet contains a handwritten English translation of Professor Sewall's funeral oration for President Edward Holyoke on June 25, 1769. The translation begins, "Whereas the Summer advancing when we survey the Earth mantled in green..." The copy includes a small number of edits.

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PAWP, a candidate sperm-borne oocyte activating factor, induces oocyte activation and acts upstream of the calcium signalling pathway, however, PAWP’s downstream signalling pathway in oocyte cytoplasm remains to be uncovered. Data from our lab suggested that the interacting partner of PAWP, at least in the frog (Xenopus laevis) model may be YAP, a highly expressed protein in amphibian and mammalian oocytes. Therefore, the objectives of this study were to confirm that PAWP’s predominant binding partner in Xenopus laevis oocyte is YAP; to determine if mammalian oocyte activation is also dependent on PAWP-YAP interaction; and to verify that the PAWP-YAP interaction during oocyte activation is dependent on the WWI domain module. By immunohistochemistry, YAP was localized predominantly in the cytosol of metaphase II-arrested Xenopus laevis oocytes, where presumably the PAWP-YAP interaction occurs. Utilizing Far Western blotting, YAP was identified as the predominant binding partner of PAWP, in metaphase II-arrested frog (Xenopus laevis), swine (Sus scrofa) and mouse (mus musculus) oocytes. The specificity of this interaction was then tested on Far Western blotting of mouse ovarian and oocyte cytosolic extracts, by competition with both wild-type and point-mutated recombinant WWI domains derived from YAP. The removal of GST from the wild-type WWI-GST fusion protein was a requirement for effective blockage of WWI module interaction between PAWP and YAP. As expected, the mutated WWI domain was ineffective in inhibiting the PAWP-YAP interaction. To conclude, this study identified YAP as the predominant binding partner of PAWP in both amphibian and mammalian oocytes, and showed this interaction is dependent on the WWI modular interaction. The results allow us to test the functional relevance of this WWI modular interaction during oocyte activation in vivo, in the future.