462 research outputs found

    Theoretical aspects and numerical computation of the time-harmonic Green's function for an isotropic elastic half-plane with an impedance boundary condition

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    International audienceThis work presents an effective and accurate method for determining, from a theoretical and computational point of view, the time-harmonic Green's function of an isotropic elastic half-plane where an impedance boundary condition is considered. This method, based on the previous work done by Dur√°n et al. (cf. [Numer. Math. 107 (2007) 295‚Äď314; IMA J. Appl. Math. 71 (2006) 853‚Äď876]) for the Helmholtz equation in a half-plane, combines appropriately analytical and numerical techniques, which has an important advantage because the obtention of explicit expressions for the surface waves. We show, in addition to the usual Rayleigh wave, another surface wave appearing in some special cases. Numerical results are given to illustrate that. This is an extended and detailed version of the previous article by Dur√°n et al

    Ecoloop: centro de interpretación ambiental. Laguna Guapilo

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    Fil: Duran Roda, Carlos Eduardo. Universidad Católica de Córdoba. Facultad de Arquitectura; Argentin

    Estrategias gerenciales para la formacion de equipos de trabajos en empresas constructoras del Caribe colombiano

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    La presente investigaci√≥n estuvo dirigida a determinar las estrategias gerenciales para la formaci√≥n de equipos de trabajos en empresas constructoras del caribe colombiano. La misma estuvo sustentada en los planteamientos te√≥ricos referidos por: Robbins (2014), Dell‚Äôordine (2000), Mintzberg y Quinn (2000), Daft (2004), Koontz y Weihrich, (2007); entre otros. La metodolog√≠a fue de tipo descriptiva con un dise√Īo no experimental de tipo transversal, la poblaci√≥n estuvo conformada por treinta nueve cincuenta (39) sujetos gerentes de las empresas constructoras. La t√©cnica de recolecci√≥n de datos se llev√≥ a cabo a trav√©s de dos cuestionarios, uno para estrategias (69) √≠tems, el otro para la variable Trabajo en equipo, (57) √≠tems, con alternativas tipo escala Likert. La validez del instrumento se obtuvo a trav√©s del juicio de 10 expertos, Para el c√°lculo de la confiabilidad se utiliz√≥ el m√©todo de alfa Crombach, donde se obtuvo un valor de 0.81 y 0,80. Los resultados fueron tabulados de acuerdo a los reactivos e interpretados estad√≠sticamente mediante frecuencia absoluta y relativa, calculando los puntajes de tendencia central y desviaci√≥n est√°ndar. Representados por tablas. SE considera la necesidad de aplicar estrategias que permitan la creaci√≥n y funci√≥n de los equipos de trabajo.This research was conducted to determine the management strategies for the training of teams of works at construction companies in the Colombian Caribbean. It was based on the theoretical approaches concerned by: Robbins (2014), Dell'ordine (2000), Mintzberg and Quinn (2000), Daft (2004), Koontz and Weihrich, (2007); among others. The methodology was descriptive with cross-type non-experimental design, the population was conformed by thirty nine (39) fifty subject construction companies managers. The technique of data collection took place through two questionnaires, one for strategies (69) items, the other for the variable work in team, (57) items, with alternatives type Likert scale. The validity of the instrument was obtained through the judgement of 10 experts, for the calculation of the reliability was used the method of Alpha Cronbach, where obtaining a value of 0.81 and 0.80. The results were tabulated according to the reagents and interpreted statistically using absolute and relative frequency, calculating the scores of central tendency and standard deviation. Represented by tables. It is considered the need to implement strategies that allow the creation and function of the work teams

    Um Biorreator De Prateleiras Para Superfìcies (bps) Para A Produção De Um Metabólito Bacteriano

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    Nesta invenção, desenvolveu-se um procedimento detalhado de produção, extração e purificação da violaceína, partindo do cultivo de Chromobacterium violaceum CCT 3496. Construiu-se também um biorreator de prateleiras para superfícies para a etapa de produção da violaceína. Na etapa de produção, foram utilizadas garrafas de Roux de 1 litro e o biorreator tipo BPS. Na extração, empregou-se etanol comercial e na purificação, utilizaram-se as técnicas de filtração, extração em Soxhlet, cristalização e cromatografia liquida (HPLC).BR9702986 (A)A61K31/404A61P31/04A61P31/12C12M1/14C12P17/16C12R1/01C12M1/14A61K31/404A61P31/04A61P31/12C12P17/16C12R1/01BR19979702986A61K31/404A61P31/04A61P31/12C12M1/14C12P17/16C12R1/01C12M1/14A61K31/404A61P31/04A61P31/12C12P17/16C12R1/0
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