999 resultados para A. bifilosa c1 WMD


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This thesis presents the microwave dielectric properties of two novel dielectric resonator materials with the composition Ca(Ca1/4Nb2/4Ti1/4)O3 and Ca(Ca1/4Ta2/4Ti1/4)O3 ceramics and their application in the fabrication of wideband antennas. The microwave dielectric properties of the ceramics were tailored by several techniques such as doping, glass addition and solid solution formations in the complex perovskite A and B-sites with suitable substitutions. Among the wide variety of DRs developed, ceramic resonators with optimum properties were identified to fabricate broadband dielectric resonator loaded microstrip patch antennas. Furthermore, wideband, high permittivity dielectric resonator antennas were fabricated and explored the possibility of tuning their characteristics by modifying the feed line geometries.

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Se trata de examinar los probables efectos de un creciente uso de ordenadores en la educación. Se centra en la división del conocimiento humano en dos clases: conocimiento uno (C1), que comprende todo lo que el hombre sabe; y conocimiento dos (C2), que consiste en todo conocimiento acumulado en libros y bibliotecas. A r­z de esto, se introduce un tercer conocimiento (C3): la informática, que se introduce con creciente rapidez en la sociedad. C3 supone un cambio radical en las industrias del p­s y tiene grandes repercusiones a través de toda la sociedad.

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Memoria de máster (Universidad de Salamanca, 2006). Resumen basado en el de la publicación

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Memoria de máster (Universidad de Barcelona, 2006-2008). Incluye anexos. Resumen basado en el de la publicación

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Resumen basado en el de la publicación. Memoria de máster (Universidad de J©n-FUNIBER, 2010)

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Memoria de máster (Universidad Rovira i Virgili, 2011). Incluye anexos. Resumen basado en el de la publicación

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Incluye ???Gu??a did??ctica" (26 p.), "Actividades de ampliaci??n y refuerzo" (8 p.) y "Actividades para grupos heterog??neos" (12 p.)

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Incluye ???Gu??a did??ctica??? (31 p. ), ???Actividades de ampliaci??n y refuerzo??? (7 p. ) y ???Actividades para grupos heterog??neos??? (9 p. )

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Resumen basado en el de la publicaci??n

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The present work reports a convenient route for the immobilisation of a phenanthroline-bis triazine (C1-BTPhen) group on the surface of zirconia-coated maghemite (γ-Fe2O3) magnetic nanoparticles. The magnetic nanoparticles functionalized with C1-BTPhen were able to co-extract Am(III) and Eu(III) from nitric acid (HNO3). The extraction efficiency of these C1-BTPhen-functionalized magnetic nanoparticles for both Am(III) and Eu(III) was 20% at 4M HNO3. The interaction between C1-BTPhen and metal cations is reversible. These functionalized magnetic nanoparticles can be used for the co-extraction of traces of Am(III) and Eu(III).

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We use QCD sum rules to study the recently observed resonance-like structures in the pi(+)chi(c1) mass distribution, Z(1)(+) (4050) and Z(2)(+) (4250), considered as D*(+) (D) over bar*(0) and D(1)(+) (D) over bar (0) + D(+) (D) over bar (0)(1) molecules with the quantum number J(P) = 0(+) and J(P) = 1-, respectively. We consider the contributions of condensates up to dimension eight and work at leading order in alpha(s). We obtain m(D*D*) = (4.15 +/- 0.12) GeV, around 100 MeV above the D*D* threshold, and m(D1D) = (4.19 +/- 0.22) GeV, around 100 MeV below the D(1)D threshold. We conclude that the D*(+)(D) over bar*(0) state is probably a virtual state that is not related with the Z(1)(+) (4050) resonance-like structure. In the case of the D(1)D molecular state, considering the errors, its mass is consistent with both Z(1)(+)(4050) and Z(2)(+)(4250) resonance-like structures. Therefore, we conclude that no definite conclusion can be drawn for this state from the present analysis. (C) 2008 Elsevier B.V All rights reserved.