32 research outputs found

    On weighted L_p-spaces of vector-valued entire analytic functions

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    [EN] The weighted L p -spaces of entire analytic functions are generalized to the vector-valued setting. In particular, it is shown that the dual of the space LKp,Âż(E) is isomorphic to LÂżKpÂż,¿¿1(EÂż) when the function Âż K is an L p,Âż (E)-Fourier multiplier. This result allows us to give some new characterizations of the so-called UMD-property and to represent several ultradistribution spaces by means of spaces of vector sequences.Motos Izquierdo, J.; Planells Gilabert, MJ.; Talavera Usano, CF. (2008). On weighted L_p-spaces of vector-valued entire analytic functions. Mathematische Zeitschrift. 260(2):451-472. doi:10.1007/s00209-007-0283-4S4514722602Aldous D.J. (1979). Unconditional bases and martingales in L p (F). Math. Proc. Camb. Phil. Soc. 85: 117–123Amann H. (1997). Operator-valued Fourier multipliers, vector-valued Besov spaces and applications. Math. Nachr. 186: 5–56Björck G. (1966). Linear partial differential operators and generalized distributions. Ark. Mat. 6: 351–407Bourgain J. (1984). Some remarks on Banach spaces in which martingale difference sequences are unconditional. Ark. Mat. 22: 163–168Burkholder, D.L.: A geometrical condition that implies the existence of certain singular integrals of Banach-space-valued functions. In: Proceedings of conference on Harmonic analysis in Honour of Antoni Zygmund, Chicago 1981 (Belmont Cal., Wadsworth), pp. 270–286 (1983)Capon M. (1983). PrimaritĂ© de L p (X). Trans. Am. Math. Soc. 276: 431–487Coifman R.R. and Fefferman C. (1974). Weighted norm inequalities for maximal functions and singular integrals. Stud. Math. 51: 241–250Defant M. (1989). On the vector-valued Hilbert transform. Math. Nachr. 141: 251–265Diestel, J., Uhl, J.J.:Vector measures, Mathematical Surveys, no. 15, Am. Math. Soc., Providence (1977)Dinculeanu N. (1967). Vector Measures, International Series of Monographs in Pure and Applied Mathematics, no. 95. Pergamon, New YorkFefferman C. (1971). 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    The patron saint festivities before tourism in the western coast region of Mexico

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    Las festividades patronales se integran al extenso inventario del patrimonio cultural inmaterial de México. La continuidad de su practica favorecen la cohesión social, la identidad colectiva, la paz y la conciencia ecológica. Tales manifestaciones son susceptibles de patrimonialización por su expresión simbólica y su potencial económico ante el modelo turístico, responden a imperativos del capitalismo tardío que tiende a mercantilizar y a homogenizar la diversidad cultural. Estudiamos las festividades patronales de localidades de Bahía de Banderas, en particular la de Nuestra Señora de la Paz en Bucerías y la de Nuestra Señora del Rosario de Tintoque en Valle de Banderas, a fin de entender las tendencias dominantes en los procesos de patrimonialización. Nuestro objetivo es contribuir al conocimiento de la riqueza patrimonial de los pueblos costeros que han quedado sujetos al turismo y con ello, desarrollar los instrumentos metodológicos para construir las fichas del inventario de festividades de la región.The religious festivities are integrated into the extensive inventory of the intangible cultural heritage of Mexico. The continuity of their practice stimulates social cohesion, collective identity, peace and ecological awareness. Such manifestations are susceptible to patrimonialization due to their symbolic expression and their economic potential in the face of the tourism model, they respond to the imperatives of late capitalism that tends to commodify and homogenize cultural diversity. We study the religious festivities of localities of Bahía de Banderas, in particular that of Nuestra Señora de la Paz in Bucerías and that of Nuestra Señora del Rosario de Tintoque in Valle de Banderas, in order to understand the dominant trends in the processes of patrimonialization. The objective is to contribute to the knowledge of the patrimonial wealth of the coastal towns that have been subject to tourism and with it, develop the methodological instruments to fill out the information sheets of the inventory of festivities in the region

    TĂ©cnicas emergentes de mejora del compromiso eficiencia-linealidad en transmisores de radiofrecuencia

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    In this paper, an overview of emerging techniques for overcoming the current limit in the solution to the linearity versus efficiency trade-off in wireless transmitters is presented. Starting with the combination of digital predistortion and impedance synthesis techniques for dealing with wideband communication formats in I/Q transmitters, the attractive capability of envelope tracking for improving average efficiency in those architectures with available technology is highlighted. Finally, and due the intrinsic limitations of the Cartesian transmitter, the polar concept is considered. Its nonidealities are put under analysis, as they may restrict current introduction of this promising architecture. The solutions under consideration are due to the joint work from the groups of Univ. Cantabria, Univ. Zaragoza and Univ. Polit. Cataluña (UPC) under a Coordinated Project from the Spanish National Plan

    Arquitecturas de transmisiĂłn inalĂĄmbrica de alta eficiencia

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    In this paper, different architectures for improving power efficiency in modern wireless transmitters are evaluated, with their advantages and limitations. Dynamic load modulation and digital predistortion techniques are employed for improving the characteristics of classical I/Q transmitters under wideband communication formats, while envelope tracking implementation details are considered for further improving average efficiency in those architectures according to current available technology. Finally, advances in the RF path design of the emerging polar transmitter topology are also presented
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