Enlaces. Relatos sobre la conexión de tiempos y lugares

A través de algunos relatos en torno al espacio se ensaya un discurso sobre la conexión entre arte y vida, que postula la relación entre escenas, la continuidad entre arte y lugar, y el entrelazamiento creativo y narrativo entre disciplinas artísticas. El artículo pretende registrar la conexión, en ambos sentidos del vector, entre lugares y proyectos, un vínculo inasible pero real. Todo escritor persigue las marcas de la actividad humana sobre los objetos, la probatura de una teoría de los objetos inanimados que registramos desde nuestras herramientas de analogía y contraste antropométrico. Ése es también el empeño del arte y ésa era la definición del propio origen de la pintura de Plinio, el intento de retener la compañía de la persona amada dibujando la sombra de su perfil sobre una superficie, convertida en un museo espontáneo al fresco. Las obras de arte, como algunos proyectos, deberían ser hilos, en el tiempo y el espacio, enlaces del arte y la vida: entre nuestra mesa y el territorio, entre la mente y la materia, entre el hombre y el mundo.

Sistemas de acreditação e certificação hospitalar em Portugal Continetal

Dissertação apresentada à Escola Superior Agrária do Instituto Politécnico de Castelo Branco para obtenção do grau de Mestre em Inovação e Qualidade na Produção Alimentar.

Tight-Binding Approximations in 1D and 2D Coupled-Cavity Photonic Crystal Structures

Light confinement and controlling an optical field has numerous applications in the field of telecommunications for optical signals processing. When the wavelength of the electromagnetic field is on the order of the period of a photonic microstructure, the field undergoes reflection, refraction, and coherent scattering. This produces photonic bandgaps, forbidden frequency regions or spectral stop bands where light cannot exist. Dielectric perturbations that break the perfect periodicity of these structures produce what is analogous to an impurity state in the bandgap of a semiconductor. The defect modes that exist at discrete frequencies within the photonic bandgap are spatially localized about the cavity-defects in the photonic crystal. In this thesis the properties of two tight-binding approximations (TBAs) are investigated in one-dimensional and two-dimensional coupled-cavity photonic crystal structures We require an efficient and simple approach that ensures the continuity of the electromagnetic field across dielectric interfaces in complex structures. In this thesis we develop \textrm{E} -- and \textrm{D} --TBAs to calculate the modes in finite 1D and 2D two-defect coupled-cavity photonic crystal structures. In the \textrm{E} -- and \textrm{D} --TBAs we expand the coupled-cavity \overrightarrow{E} --modes in terms of the individual \overrightarrow{E} -- and \overrightarrow{D} --modes, respectively. We investigate the dependence of the defect modes, their frequencies and quality factors on the relative placement of the defects in the photonic crystal structures. We then elucidate the differences between the two TBA formulations, and describe the conditions under which these formulations may be more robust when encountering a dielectric perturbation. Our 1D analysis showed that the 1D modes were sensitive to the structure geometry. The antisymmetric \textrm{D} mode amplitudes show that the \textrm{D} --TBA did not capture the correct (tangential \overrightarrow{E} --field) boundary conditions. However, the \textrm{D} --TBA did not yield significantly poorer results compared to the \textrm{E} --TBA. Our 2D analysis reveals that the \textrm{E} -- and \textrm{D} --TBAs produced nearly identical mode profiles for every structure. Plots of the relative difference between the \textrm{E} and \textrm{D} mode amplitudes show that the \textrm{D} --TBA did capture the correct (normal \overrightarrow{E} --field) boundary conditions. We found that the 2D TBA CC mode calculations were 125-150 times faster than an FDTD calculation for the same two-defect PCS. Notwithstanding this efficiency, the appropriateness of either TBA was found to depend on the geometry of the structure and the mode(s), i.e. whether or not the mode has a large normal or tangential component.

Saúde e outros : natalidade e fertilidade nos estudantes universitários

Trabalho Final do Curso de Mestrado Integrado em Medicina, Faculdade de Medicina, Universidade de Lisboa, 2014

Opiniões sobre a visita de enfermagem em unidades de cirurgia: tradução, adaptação e validação de questionários

Enquadramento: Apesar da visita de enfermagem ou passagem de turno junto dos doentes garantir a continuidade dos cuidados de enfermagem, origina diversas questões éticas. Objetivos: Traduzir, adaptar e validar 2 questionários de colheita de dados sobre a visita de enfermagem em unidades cirúrgicas para a cultura portuguesa; identificar a opinião dos doentes e dos enfermeiros sobre a visita de enfermagem. Metodologia: Tradução, retroversão e adaptação dos questionários aplicados em 7 unidades cirúrgicas de um hospital central em Portugal de 22/08/2008 a 28/06/2009. A amostragem não probabilística acidental foi constituída por 137 enfermeiros e 96 doentes. Resultados: A visita de enfermagem promove a relação empática e de ajuda; a observação do doente e o planeamento de cuidados, no entanto é necessário clarificar o seu objetivo; incentivar à participação e ao envolvimento dos doentes; utilizar um discurso compreensível e garantir a privacidade da informação. Conclusão: Os questionários revelaram-se fidedignos e válidos na identificação das opiniões dos doentes e dos enfermeiros sobre a visita de enfermagem nas unidades de cirurgia em estudo.

La ruptura epistemológica de Bachelard a Balibar y Pêcheux

En el presente trabajo intentaremos analizar cierta serie o tradición de reflexiones sobre el conocimiento científico que lo caracterizan por su discontinuidad en relación al conocimiento ordinario o sentido común. El origen de esta serie puede localizarse en la obra de Gaston Bachelard y su peculiar estudio de los actos epistemológicos con los que se rompe con el pasado en una disciplina científica. Estos actos contrastan con lo que este autor califica como el "mito continuista" del empirismo. Esta posición será apropiada por Althusser y desarrollada por sus discípulos Balibar y Pêcheux. Intentaremos mostrar que el factor común de la discontinuidad no constituye ;una posición monolítica, sino que cabe reconocer, en las posiciones que consideramos, maneras diversas de entender la naturaleza de la misma. En este sentido, la revisión de las posiciones que Althusser efectuó en su "autocrítica" constituye un punto de observación privilegiado del abanico de alternativas que algunos de sus discípulos desarrollarían sobre bases diversas

La ruptura epistemológica de Bachelard a Balibar y Pêcheux

En el presente trabajo intentaremos analizar cierta serie o tradición de reflexiones sobre el conocimiento científico que lo caracterizan por su discontinuidad en relación al conocimiento ordinario o sentido común. El origen de esta serie puede localizarse en la obra de Gaston Bachelard y su peculiar estudio de los actos epistemológicos con los que se rompe con el pasado en una disciplina científica. Estos actos contrastan con lo que este autor califica como el "mito continuista" del empirismo. Esta posición será apropiada por Althusser y desarrollada por sus discípulos Balibar y Pêcheux. Intentaremos mostrar que el factor común de la discontinuidad no constituye ;una posición monolítica, sino que cabe reconocer, en las posiciones que consideramos, maneras diversas de entender la naturaleza de la misma. En este sentido, la revisión de las posiciones que Althusser efectuó en su "autocrítica" constituye un punto de observación privilegiado del abanico de alternativas que algunos de sus discípulos desarrollarían sobre bases diversas

A pluralistic universe : Hibbert lectures at Manchester college on the present situation in philosophy /

I. The types of philosophic thinking.--II. Monistic idealism.III. Hegel and his method.--IV. Bergson and his critique of intellectualism.--VII. The continuity of experience.--VIII. Conclusions. Notes.--Appendices. A. The thing and its relations. B. The experience of activity. C. On the notion of reality as changing.-- Index.

Father and son : biographical recollections /

Published in England under title: Father and son: A study of two temperaments.

Form and content in the Christian tradition : a friendly discussion between W. Sanday and N.P. Williams.

"The present discussion arose out of an article ['Continuity of thought and relativity of expression'] contributed by me to the Modern churchman for June 1915."--Pref., signed W. Sanday.

La ruptura epistemológica de Bachelard a Balibar y Pêcheux

En el presente trabajo intentaremos analizar cierta serie o tradición de reflexiones sobre el conocimiento científico que lo caracterizan por su discontinuidad en relación al conocimiento ordinario o sentido común. El origen de esta serie puede localizarse en la obra de Gaston Bachelard y su peculiar estudio de los actos epistemológicos con los que se rompe con el pasado en una disciplina científica. Estos actos contrastan con lo que este autor califica como el "mito continuista" del empirismo. Esta posición será apropiada por Althusser y desarrollada por sus discípulos Balibar y Pêcheux. Intentaremos mostrar que el factor común de la discontinuidad no constituye ;una posición monolítica, sino que cabe reconocer, en las posiciones que consideramos, maneras diversas de entender la naturaleza de la misma. En este sentido, la revisión de las posiciones que Althusser efectuó en su "autocrítica" constituye un punto de observación privilegiado del abanico de alternativas que algunos de sus discípulos desarrollarían sobre bases diversas

The Debreu Gap Lemma and some generalizations

In this paper we study the Debreu Gap Lemma and its generalizations to totally ordered sets more general than (R, less than or equal to). We explain why it is important in economics to study utility functions which may not be real-valued and we build the foundations of a theory of continuity of such generalized utility functions. (C) 2004 Published by Elsevier B.V.

Winding patterns for biplanar MRI shim coils with rectangular and circular target-field regions

A method is presented for calculating the winding patterns required to design independent zonal and tesseral biplanar shim coils for magnetic resonance imaging. Streamline, target-field, Fourier integral and Fourier series methods are utilized. For both Fourier-based methods, the desired target field is specified on the surface of the conducting plates. For the Fourier series method it is possible to specify the target field at additional depths interior to the two conducting plates. The conducting plates are confined symmetrically in the xy plane with dimensions 2a x 2b, and are separated by 2d in the z direction. The specification of the target field is symmetric for the Fourier integral method, but can be over some asymmetric portion pa < x < qa and sb < y < tb of the coil dimensions (-1 < p < q < 1 and -1 < s < t < 1) for the Fourier series method. Arbitrary functions are used in the outer sections to ensure continuity of the magnetic field across the entire coil face. For the Fourier series case, the entire field is periodically extended as double half-range sine or cosine series. The resultant Fourier coefficients are substituted into the Fourier series and integral expressions for the internal and external magnetic fields, and stream functions on both the conducting surfaces. A contour plot of the stream function directly gives the required coil winding patterns. Spherical harmonic analysis of field calculations from a ZX shim coil indicates that example designs and theory are well matched.

Vertical handover supporting pervasive computing in future wireless networks

A variety of current and future wired and wireless networking technologies can be transformed into a seamless communication environments through application of context-based vertical handovers. Such seamless communication environments are needed for future pervasive/ubiquitous systems. Pervasive systems are context aware and need to adapt to context changes, including network disconnections and changes in network Quality of Service (QoS). Vertical handover is one of many possible adaptation methods. It allows users to roam freely between heterogeneous networks while maintaining the continuity of their applications. This paper proposes a vertical handover mechanism suitable for multimedia applications in pervasive systems. The paper focuses on the handover decision making process which uses context information regarding user devices, user location, network environment and requested QoS. (C) 2004 Elsevier B.V. All rights reserved.

Genetic algorithms with applications in wireless communications

Genetic algorithms (GAs) are known to locate the global optimal solution provided sufficient population and/or generation is used. Practically, a near-optimal satisfactory result can be found by Gas with a limited number of generations. In wireless communications, the exhaustive searching approach is widely applied to many techniques, such as maximum likelihood decoding (MLD) and distance spectrum (DS) techniques. The complexity of the exhaustive searching approach in the MLD or the DS technique is exponential in the number of transmit antennas and the size of the signal constellation for the multiple-input multiple-output (MIMO) communication systems. If a large number of antennas and a large size of signal constellations, e.g. PSK and QAM, are employed in the MIMO systems, the exhaustive searching approach becomes impractical and time consuming. In this paper, the GAs are applied to the MLD and DS techniques to provide a near-optimal performance with a reduced computational complexity for the MIMO systems. Two different GA-based efficient searching approaches are proposed for the MLD and DS techniques, respectively. The first proposed approach is based on a GA with sharing function method, which is employed to locate the multiple solutions of the distance spectrum for the Space-time Trellis Coded Orthogonal Frequency Division Multiplexing (STTC-OFDM) systems. The second approach is the GA-based MLD that attempts to find the closest point to the transmitted signal. The proposed approach can return a satisfactory result with a good initial signal vector provided to the GA. Through simulation results, it is shown that the proposed GA-based efficient searching approaches can achieve near-optimal performance, but with a lower searching complexity comparing with the original MLD and DS techniques for the MIMO systems.