53 research outputs found

    Suplicació de la confraria de velluters sobre entrades de teles estrangeres

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    [10] p. ; 2º (29 cm)Alegación jurídica a la solicitud hecha por la cofradía de Terciopeleros de Barcelona relativa a los perjuicios que podía provocar una reciente ordenanza a favor de el libre comercio aprobada en el principado de Catalunya y condados de Rosselló y Cerdanya, la cual prohibía la entrada y el ataviarse con ropas de lana, seda o oro extranjeras. Los doctores defienden la nueva ordenanza alegando, por ejemplo, "que en Liorna o Astradam, o en altres ciutats y llochs de negociatió, no las fan ricas las mercaderies que allí entran per vestir y arrearse los qui las habitan, sinó las ques trauhen y n ixen, perquè de la exida resta lo diner en dites ciutats y llochs

    The biological activity of some (p-chlorophenyl) compounds synergistic with DDT.

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    The discovery, during the Second World war, of the insecticidal properties of DDT (Lauger et al. 1944) was heralded by entomologists as a panacea for the problems encountered in insect control measures. The high toxicity of this compound to several species of insects and its relative harmlessness to warm-blooded animals led to its rapid adoption and widespread use. Several insect species were, however, subsequently reported (cf. Weisman 1947; Sacca 1947; Mosna 1947; Johnson and Hill 1948; Deonier et al. 1950) which showed a greater or smaller degree of tolerance to the insecticide

    Spectro-morphologie des galaxies (étude quantitative et multi-longueur d'onde de la morphologie des galaxies)

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    La morphologie des galaxies est la conséquence d'un ensemble de processus physiques qui interagissent et façonnent les galaxies depuis leur formation. Un des buts d'une classification morphologique est de rendre compte de ces processus physiques, c'est-à-dire être physiquement interprétable, cohérente et complète. La classification morphologique de Hubble n'est plus un outil adapté aux besoins de l'astrophysique moderne. D'une part la morphologie des galaxies change avec la longueur d'onde. D'autre part, une proportion croissante avec le redshift de galaxies n'entre pas dans la séquence de Hubble. Cette thèse décrit un système de classification multi-longueur d'onde automatique et objectif, basé sur les paramètres quantitatifs de concentration et d'asymétrie des galaxies. La méthode a été appliquée avec succès à un échantillon de 456 galaxies à haut redshift, et constitue un outil prometteur pour contraindre les modèles de formation et d'évolution des galaxies.AIX-MARSEILLE1-BU Sci.St Charles (130552104) / SudocSudocFranceF

    Space Station Freedom Cupola Definition

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    Nanogel formation of polymer solutions flowing through porous media

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    A gelation process was seen to occur when Boger fluids made from aqueous solutions of polyacrylamide (PAA) and NaCl flowed through porous media with certain characteristics. As these viscoelastic fluids flow through a porous medium, the pressure drop across the bed varies linearly with the flow rate, as also happens with Newtonian fluids. Above a critical flow rate, elastic effects set in and the pressure drop grows above the low-flow-rate linear regime. Increasing further the flow rate, a more dramatic increase in the slope of the pressure drop curve can be observed as a consequence of nanogel formation. In this work, we discuss the reasons for this gelation process based on our measurements using porous media of different sizes, porosity and chemical composition. Additionally, the rheological properties of the fluids were investigated for shear and extensional flows. The fluids were also tested as they flowed through different microfluidic analogues of the porous media. The results indicate that the nanogel inception occurs with the adsorption of PAA molecules on the surface of the porous media particles that contain silica on their surfaces. Subsequently, if the interparticle space is small enough a jamming process occurs leading to flow-induced gel formation

    Spectro-morphology of galaxies: A multi-wavelength (UV-R) classification method

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    We present a quantitative method to classify galaxies, based on multi-wavelength data and constructed from the properties of nearby galaxies. Our objective is to define an classification method that can be used for low and high redshift objects. We estimate the concentration of light (C) at the galaxy center and the 180° rotational asymmetry (A), computed at several wavelengths, from ultraviolet (UV) to I-band. The variation of the indices of concentration and asymmetry with the wavelength reflects the proportion and the distribution of young and old stellar populations in galaxies. In general C is found to decrease, and A to increase from optical to UV: the patchy appearance of a galaxy in the UV with no bulge is often very different from its counterpart at optical wavelengths, with a prominent bulge and a more regular disk. We quantify the variation of C and A with wavelength. In this way we are able to distinguish five types of galaxies that we call spectro-morphological types: compact, ringed, spiral, irregular and central-starburst galaxies, which can be differentiated by the distribution of their stellar populations. We discuss in detail the morphology of the galaxies of the sample, and describe the morphological characteristics of each spectro-morphological type. We apply spectro-morphology to three objects at a redshift z~1 in the Hubble Deep Field North, which gives encouraging results for applications to large samples of high-redshift galaxies. This method of morphological classification could be used to study the evolution of the morphology with redshift and is expected to put observational constraints on scenarios of galaxy evolution
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