920 resultados para Shaping of targets


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Aunque los conjuntos de vivienda social carecen en Europa de un nivel de protección patrimonial comparable a otras áreas urbanas, las negociaciones que surgen a raíz del anuncio de su remodelación o rehabilitación resultan inexplicables si no se supone su aceptación como patrimonio por parte de algunos de los actores implicados. Nos encontraríamos entonces no con un repertorio patrimonial consolidado, sino ante un proceso de patrimonialización, entendido no sólo como el paso de la categoría de no-patrimonio a la de patrimonio mediante la protección jurídica o urbanística, sino también como la construcción del consenso social suficiente en torno la posesión de ciertos valores preexistentes, así como la producción y reproducción social e histórica de estos valores. Ante el incipiente proceso de patrimonialización de determinados Barrios de Promoción Oficial madrileños, la tesis aborda dos cuestiones fundamentales, los mecanismos que conducen a su construcción social e histórica como nuevos elementos patrimoniales, y la evolución y estado actual del conjunto de elementos eventualmente patrimonializables, los Barrios de Promoción Oficial madrileños. De esta forma, propone un modelo teórico del proceso de patrimonialización de los conjuntos de vivienda social, basado en la identificación de discursos, valores, sujetos y etapas, así como de su relación con las características físicas y sociales originales de los barrios y su evolución hasta la actualidad. Para ello, se reconstruye la evolución física, social y de la protección patrimonial de los Barrios de Promoción Oficial madrileños, y se analizan tres procesos concretos de patrimonialización, la participación de la Colonia del Tercio y Terol en la defensa ciudadana de las Colonias Históricas madrileñas (1973-1979), la incorporación de criterios patrimoniales en la rehabilitación integral del Poblado Dirigido de Caño Roto (1991-2004), y la protección patrimonial como obstáculo para la remodelación de la U.V.A. de Hortaleza (2004-2015). ABSTRACT Comparatively speaking, few social housing estates are legally protected as cultural heritage in Europe. However, when a physical intervention is announced, the ensuing negotiation often defies explanation unless one assumes that the estate is regarded as cultural heritage by some of the players involved. Therefore, one should not so much talk of social housing as heritage, but of the process of patrimonialisation, which refers not only to the change of these estates from the status of non-heritage to that of cultural heritage through their legal recognition, but also to the process that leads to the acknowledgment of certain values in these estates, and even the social and cultural shaping of these values. This thesis tackles two main issues: the mechanisms that lead to the social and historical construction of new heritage elements or repertoires, and the evolution and current status of the Barrios de Promoción Oficial in Madrid. It proposes a theoretical model of the process of patrimonialisation of social housing estates, based on the identification of discourses, values, subjects and phases, as well as its relationship with the original physical and social features of these estates and their further evolution up to the present. In order to do so, the changes in the physical and social features of the Barrios de Promoción Oficial and in their heritage protection are reconstructed, and three particular processes are analysed. These are the role of Colonia del Tercio y Terol in the citizens’ movement for the preservation of the Colonias Históricas in Madrid (1973-1979), the incorporation of conservation criteria in the refurbishment of Poblado Dirigido de Caño Roto (1991-2004), and heritage as an obstacle to urban renewal in U.V.A. de Hortaleza (2004-2015).

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The relative contribution of genetic and socio-cultural factors in the shaping of behavior is of fundamental importance to biologists and social scientists, yet it has proven to be extremely difficult to study in a controlled, experimental fashion. Here I describe experiments that examined the strength of genetic and cultural (imitative) factors in determining female mate choice in the guppy, Poecilia reticulata. Female guppies from the Paria River in Trinidad have a genetic, heritable preference for the amount of orange body color possessed by males. Female guppies will, however, also copy (imitate) the mate choice of other females in that when two males are matched for orange color, an "observer" female will copy the mate choice of another ("model") female. Three treatments were undertaken in which males differed by an average of 12%, 24%, or 40% of the total orange body color. In all cases, observer females viewed a model female prefer the less colorful male. When males differed by 12% or 24%, observer females preferred the less colorful male and thus copied the mate choice of others, despite a strong heritable preference for orange body color in males. When males differed by 40% orange body color, however, observer females preferred the more colorful male and did not copy the mate choice of the other female. In this system, then, imitation can "override" genetic preferences when the difference between orange body color in males is small or moderate, but genetic factors block out imitation effects when the difference in orange body color in males is large. This experiment provides the first attempt to experimentally examine the relative strength of cultural and genetic preferences for a particular trait and suggests that these two factors moderate one another in shaping social behavior.

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A dedicated mission to investigate exoplanetary atmospheres represents a major milestone in our quest to understand our place in the universe by placing our Solar System in context and by addressing the suitability of planets for the presence of life. EChO—the Exoplanet Characterisation Observatory—is a mission concept specifically geared for this purpose. EChO will provide simultaneous, multi-wavelength spectroscopic observations on a stable platform that will allow very long exposures. The use of passive cooling, few moving parts and well established technology gives a low-risk and potentially long-lived mission. EChO will build on observations by Hubble, Spitzer and ground-based telescopes, which discovered the first molecules and atoms in exoplanetary atmospheres. However, EChO’s configuration and specifications are designed to study a number of systems in a consistent manner that will eliminate the ambiguities affecting prior observations. EChO will simultaneously observe a broad enough spectral region—from the visible to the mid-infrared—to constrain from one single spectrum the temperature structure of the atmosphere, the abundances of the major carbon and oxygen bearing species, the expected photochemically-produced species and magnetospheric signatures. The spectral range and resolution are tailored to separate bands belonging to up to 30 molecules and retrieve the composition and temperature structure of planetary atmospheres. The target list for EChO includes planets ranging from Jupiter-sized with equilibrium temperatures T_ eq up to 2,000 K, to those of a few Earth masses, with T _eq \u223c 300 K. The list will include planets with no Solar System analog, such as the recently discovered planets GJ1214b, whose density lies between that of terrestrial and gaseous planets, or the rocky-iron planet 55 Cnc e, with day-side temperature close to 3,000 K. As the number of detected exoplanets is growing rapidly each year, and the mass and radius of those detected steadily decreases, the target list will be constantly adjusted to include the most interesting systems. We have baselined a dispersive spectrograph design covering continuously the 0.4–16 μm spectral range in 6 channels (1 in the visible, 5 in the InfraRed), which allows the spectral resolution to be adapted from several tens to several hundreds, depending on the target brightness. The instrument will be mounted behind a 1.5 m class telescope, passively cooled to 50 K, with the instrument structure and optics passively cooled to \u223c45 K. EChO will be placed in a grand halo orbit around L2. This orbit, in combination with an optimised thermal shield design, provides a highly stable thermal environment and a high degree of visibility of the sky to observe repeatedly several tens of targets over the year. Both the baseline and alternative designs have been evaluated and no critical items with Technology Readiness Level (TRL) less than 4–5 have been identified. We have also undertaken a first-order cost and development plan analysis and find that EChO is easily compatible with the ESA M-class mission framework.

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A presente tese tem como objetivo analisar territorialização dos descendentes pomeranos na região de Pancas/ES e o processo de recriação/resignficação de sua identidade étnica e social e de seu modo de vida. Entende-se o território como um espaço constituído a partir de relações sociais desenvolvidas ao longo do tempo e, portanto, repleto das relações contraditórias do modo de produção capitalista, como o campesinato, que tende tanto à sua destruição como também necessita de relações não capitalistas em sua lógica, possibilitanto assim, sua recriação. A comunidade de camponeses pomeranos se territorializou na área onde se localizam os Pontões Capixabas a partir de 1918, mas, desde o ano de 2002 passou a viver uma situação de conflito fundiário, pois suas terras (colônias) estavam sob ameaça de desapropriação, colocandoos em uma disputa territorial na tentativa de barrar a possível expropriação das terras e consequentemente do seu modo de vida tradicional frente à implantação de uma Unidade de Conservação Ambiental de Proteção Integral. Neste contexto de conflito, a consciência de classe se faz presente com mais força, levando ao fazer-se dessa classe social, que entendia já ter conquistado a terra de trabalho. O território é fator fundante para a recuperação e afirmação da identidade étnica e social dos imigrantes pomeranos, identidade esta perdida não só com o fim da Pomerânia enquanto nação, mas por todo o processo de expropriação e dominação que sofreram ao longo do tempo, e, recuperada com a territorialização, pois, o acesso à terra de trabalho possibilitou a continuidade de seu modo de vida, mas principalmente a manutenção da língua tradicional e a recriação enquanto camponês e pomerano.

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In this paper, we demonstrate the use of a video camera for measuring the frequency of small-amplitude vibration movements. The method is based on image acquisition and multilevel thresholding and it only requires a video camera with high enough acquisition rate, not being necessary the use of targets or auxiliary laser beams. Our proposal is accurate and robust. We demonstrate the technique with a pocket camera recording low-resolution videos with AVI-JPEG compression and measuring different objects that vibrate in parallel or perpendicular direction to the optical sensor. Despite the low resolution and the noise, we are able to measure the main vibration modes of a tuning fork, a loudspeaker and a bridge. Results are successfully compared with design parameters and measurements with alternative devices.

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La elección de examinar la contrarrevolución a través de sus mayores éxitos, las cuatro restauraciones victoriosas, y su derrota, la restauración fallida, puede enriquecer las perspectivas tradicionales sobre la resistencia y la crisis del Reino de las dos Sicilias. Los conflictos europeos, las guerras civiles, las construcciones estatales y la creación de identidades nacionales modernas son fenómenos que se entrecruzan con la complicada historia del reino napolitano. A través de la perspectiva de las restauraciones, bien dinásticas (1799 y 1815), o bien absolutistas (1821 y 1849), podemos insertar en un esquema interpretativo general la dialéctica entre conflicto interno y crisis internacionales, la interrelación con la formación de las ideas y adscripciones nacionalistas y la comparación con la contrarrevolución en el mundo borbónico. El paradigma del conflicto nos permite también el contraste con el más amplio mundo borbónico, francés y, sobre todo, iberoamericano. De este modo podemos reflexionar tanto sobre el éxito del legitimismo napolitano como sobre los términos de su derrota en 1860 y sobre las razones de su reciente fortuna en el imaginario colectivo italiano.

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Subpixel techniques are commonly used to increase the spatial resolution in tracking tasks. Object tracking with targets of known shape permits obtaining information about object position and orientation in the three-dimensional space. A proper selection of the target shape allows us to determine its position inside a plane and its angular and azimuthal orientation under certain limits. Our proposal is demonstrated both numerical and experimentally and provides an increase the accuracy of more than one order of magnitude compared to the nominal resolution of the sensor. The experiment has been performed with a high-speed camera, which simultaneously provides high spatial and temporal resolution, so it may be interesting for some applications where this kind of targets can be attached, such as vibration monitoring and structural analysis.

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Más allá del mito de la discreta regente de España, María Cristina de Habsburgo ofrece una imagen poliédrica que puede contribuir a calibrar la importancia política, cultural y social de la representación simbólica de la corona. Las imágenes —oficial, de la oposición y populares— de María Cristina son analizadas desde diversas perspectivas: la consolidación de una monarquía en crisis tras el fallecimiento de Alfonso XII pocos años después de la República, la creación de una identidad nacional todavía no afirmada y la conformación de los estereotipos de género en torno al discurso de la separación de esferas. Imágenes que daban respuestas muchas veces divergentes a las circunstancias que distinguían a Maria Cristina de otros monarcas: era regente y no reina por derecho propio, era extranjera pero ocupaba el trono español y era mujer pero desempeñaba la más alta magistratura del país.

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El litoral de la provincia de Alicante ha registrado importantes cambios territoriales desde la década de 1960, como consecuencia de la difusión de las actividades turísticas. Las transformaciones territoriales, entre las que destaca la configuración de una dorsal de poblamiento litoral, se completan con las sociales. La llegada de población extranjera jubilada o prejubilada procedente del norte y centro de Europa ha hecho de la provincia de Alicante (España) uno de los territorios donde el turismo residencial tiene mayor peso a escala nacional. El objetivo de esta investigación es, por un lado, analizar los factores que justifican el asentamiento de amplios colectivos de inmigrantes en estas tierras y, por otro, poner de manifiesto las repercusiones sociales y territoriales asociadas a su llegada. La realización de entrevistas en urbanizaciones de municipios litorales y prelitorales permite avanzar en el conocimiento de estos factores, más allá de los datos estadísticos.

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From the Introduction. In 2012, China approached the countries of Central-Eastern Europe (CEE) with a proposal concerning regional cooperation in the ‘16+1’ formula. According to Chinese analysts, the rationale behind this breakthrough decision was Beijing’s acknowledgment of the growing importance of the region’s states within the European Union as well as a partial elimination of the ideological differences which had hamstrung cooperation in previous years. It seems that the eurozone crisis may be perceived as the reason for the CEE states’ increased interest in developing their cooperation with China. These circumstances have opened a ‘window of opportunity’ which Beijing has decided to exploit to create a kind of bridgehead in the region which it could later use in its further economic expansion in Europe. Apart from opening the CEE region up for investments, the ‘16+1’ format was intended to facilitate the shaping of relations between China and the EU and to become a tool in building a positive image for China. Chinese experts agree that after three years of functioning, the ‘16+1’ regional cooperation format has helped Beijing achieve its goals only to a limited extent. The major obstacles have included: the immense diversification of the region, barriers related to EU law, insufficient expertise on the part of Chinese companies, the asymmetry of economic needs on both sides, and no willingness within the region itself to develop cooperation. Regardless of the limited effectiveness of activities carried out so far, China has continued its ‘16+1’ initiative. This continuation and the progressing institutionalisation of cooperation in the ‘16+1’ format have often seemed superficial. China has been using this multi-party formula to improve its long-term bilateral relations with selected states in the region and thereby to create a basis for Beijing’s political and economic presence in Central-Eastern Europe.

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"Delivered under the auspices of Pacific theological seminary...in the spring of 1911."

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Vaccinology is a combinatorial science which studies the diversity of pathogens and the human immune system, and formulations that can modulate immune responses and prevent or cure disease. Huge amounts of data are produced by genomics and proteomics projects and large-scale screening of pathogen-host and antigen-host interactions. Current developments in computational vaccinology mainly support the analysis of antigen processing and presentation and the characterization of targets of immune response. Future development will also include systemic models of vaccine responses. Immunomics, the large-scale screening of immune processes which includes powerful immunoinformatic tools, offers great promise for future translation of basic immunology research advances into successful vaccines.

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We examined the relations between selection for perception and selection for action in a patient FK, with bilateral damage to his temporal and medial frontal cortices. The task required a simple grasp response to a common object (a cup) in the presence of a distractor (another cup). The target was cued by colour or location, and FK made manual responses. We examined the effects on performance of cued and uncued dimensions of both the target and the distractor. FK was impaired at perceptually selecting the target when cued by colour, when the target colour but not its location changed on successive trials. The effect was sensitive to the relative orientations of targets and distractors, indicating an effect of action selection on perceptual selection, when perceptual selection was weakly instantiated. The dimension-specific carry-over effect on reaching was enhanced when there was a temporal delay between a cue and the response, and it disappeared when there was a between-trial delay. The results indicate that perceptual and action selection systems interact to determine the efficiency with which actions are selected to particular objects.

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Task classification is introduced as a method for the evaluation of monitoring behaviour in different task situations. On the basis of an analysis of different monitoring tasks, a task classification system comprising four task 'dimensions' is proposed. The perceptual speed and flexibility of closure categories, which are identified with signal discrimination type, comprise the principal dimension in this taxonomy, the others being sense modality, the time course of events, and source complexity. It is also proposed that decision theory provides the most complete method for the analysis of performance in monitoring tasks. Several different aspects of decision theory in relation to monitoring behaviour are described. A method is also outlined whereby both accuracy and latency measures of performance may be analysed within the same decision theory framework. Eight experiments and an organizational study are reported. The results show that a distinction can be made between the perceptual efficiency (sensitivity) of a monitor and his criterial level of response, and that in most monitoring situations, there is no decrement in efficiency over the work period, but an increase in the strictness of the response criterion. The range of tasks exhibiting either or both of these performance trends can be specified within the task classification system. In particular, it is shown that a sensitivity decrement is only obtained for 'speed' tasks with a high stimulation rate. A distinctive feature of 'speed' tasks is that target detection requires the discrimination of a change in a stimulus relative to preceding stimuli, whereas in 'closure' tasks, the information required for the discrimination of targets is presented at the same point In time. In the final study, the specification of tasks yielding sensitivity decrements is shown to be consistent with a task classification analysis of the monitoring literature. It is also demonstrated that the signal type dimension has a major influence on the consistency of individual differences in performance in different tasks. The results provide an empirical validation for the 'speed' and 'closure' categories, and suggest that individual differences are not completely task specific but are dependent on the demands common to different tasks. Task classification is therefore shovn to enable improved generalizations to be made of the factors affecting 1) performance trends over time, and 2) the consistencv of performance in different tasks. A decision theory analysis of response latencies is shown to support the view that criterion shifts are obtained in some tasks, while sensitivity shifts are obtained in others. The results of a psychophysiological study also suggest that evoked potential latency measures may provide temporal correlates of criterion shifts in monitoring tasks. Among other results, the finding that the latencies of negative responses do not increase over time is taken to invalidate arousal-based theories of performance trends over a work period. An interpretation in terms of expectancy, however, provides a more reliable explanation of criterion shifts. Although the mechanisms underlying the sensitivity decrement are not completely clear, the results rule out 'unitary' theories such as observing response and coupling theory. It is suggested that an interpretation in terms of the memory data limitations on information processing provides the most parsimonious explanation of all the results in the literature relating to sensitivity decrement. Task classification therefore enables the refinement and selection of theories of monitoring behaviour in terms of their reliability in generalizing predictions to a wide range of tasks. It is thus concluded that task classification and decision theory provide a reliable basis for the assessment and analysis of monitoring behaviour in different task situations.

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Nonlinear phenomena occurring in optical fibres have many attractive features and great, but not yet fully explored potential in signal processing. Here, we review recent progress on the use of fibre nonlinearities for the generation and shaping of optical pulses, and on the applications of advanced pulse waveforms in all-optical signal processing. Among other topics, we will discuss ultrahigh repetition-rate pulse sources, the generation of parabolic-shaped pulses in active and passive fibres, the generation of pulses with triangular temporal profiles, and coherent supercontinuum sources. The signal processing applications will span optical regeneration, linear distortion compensation, optical decision at the receiver in optical communication systems, spectral and temporal signal doubling, and frequency conversion. © 2012 IEEE.