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Search Results: 1 - 10 of 680405 matches for " Antonio J. Palacios García "
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PLATA Y CASTA AR (VILLAVERDE, MADRID). UN EJEMPLO DE INTERVENCIONES EN EL BORDE DE LA CIUDAD. URBANISMO POR Y PARA EL REALOJO
Antonio J. Palacios García
Papeles de Geografía , 2009,
Abstract: En las ciudades espa olas todavía persisten un buen número de áreas que presentan una serie de carencias urbanísticas, sociales, económicas, ambientales u otras. Es lo que se conoce como barrios desfavorecidos urbanos. Para esta aportación se analiza el caso de una zona del sur metropolitano madrile o como es la de Plata y Casta ar. En dicho barrio vamos a tratar de desentra ar el proceso de sustitución y creación de la edificación existente, los problemas acontecidos durante el desarrollo de la intervención, sus dificultades y las herramientas empleadas. Un área donde se ha intervenido frente al desfavorecimiento de forma sectorial, sobre un único elemento, el espacio construido. Aún a costa de la persistencia en el tiempo de otras graves carencias (fundamentalmente de tipo social). Una forma de intervenir muy criticada por cuanto supone la agrupación en un mismo territorio de una población desfavorecida.
Reduction of wood hygroscopicity and associated dimensional response by repeated humidity cycles
Luis García Esteban,Joseph Gril,Paloma De Palacios De Palacios,Antonio Guindeo Casasús
Physics , 2005,
Abstract: The reduction of wood response to variations of ambient humidity, described as kind of ageing, has been studied from both points of view of moisture uptake and dimensional changes. Clearwood specimens from 3 gymnosperms (Pinus sylvestris L., Pinus pinaster Ait., Pinus insignis Dougl.) and 4 angiosperms (Populus spp., Quercus pyrenaica Willd., Entandrophragma cylindricum Sprague, Chlorophora excelsa Benth. & Hook f.) were subjected to five wet-dry cycles and their moisture content and dimensional changes in radial and tangential direction at three increasing levels of relative humidity (57.6, 84.2 and 90.2%) were measured before and after the treatment. For a given increase of relative humidity, a coefficient of hygroscopic ageing was defined as the relative decrease of moisture uptake, and the coefficient of dimensional ageing as the difference of swelling strain before and after ageing. All species exhibited a clear ageing effect, much stronger in the wet range than in the dry range. Calculation of swelling coefficients suggested that in some cases the relation between swelling strain and moisture content is no longer linear in aged wood.
Abstract
J. Casalduero,P. García-Mangas,V. Palacios
Medicina Intensiva , 2006,
Abstract:
Lagrangian Noether symmetries as canonical transformations
J. Antonio García,J. M. Pons
Physics , 2000, DOI: 10.1142/S0217751X01005122
Abstract: We prove that, given a time-independent Lagrangian defined in the first tangent bundle of configuration space, every infinitesimal Noether symmetry that is defined in the $n$-tangent bundle and is not vanishing on-shell, can be written as a canonical symmetry in an enlarged phase space, up to constraints that vanish on-shell. The proof is performed by the implementation of a change of variables from the the $n$-tangent bundle of the Lagrangian theory to an extension of the Hamiltonian formalism which is particularly suited for the case when the Lagrangian is singular. This result proves the assertion that any Noether symmetry can be canonically realized in an enlarged phase space. Then we work out the regular case as a particular application of this ideas and rederive the Noether identities in this framework. Finally we present an example to illustrate our results.
Risk-based methodology for parameter calibration of a reservoir flood control model
P. Bianucci,A. Sordo-Ward,J. I. Pérez,J. García-Palacios
Natural Hazards and Earth System Sciences (NHESS) & Discussions (NHESSD) , 2013, DOI: 10.5194/nhess-13-965-2013
Abstract: Flash floods are of major relevance in natural disaster management in the Mediterranean region. In many cases, the damaging effects of flash floods can be mitigated by adequate management of flood control reservoirs. This requires the development of suitable models for optimal operation of reservoirs. A probabilistic methodology for calibrating the parameters of a reservoir flood control model (RFCM) that takes into account the stochastic variability of flood events is presented. This study addresses the crucial problem of operating reservoirs during flood events, considering downstream river damages and dam failure risk as conflicting operation criteria. These two criteria are aggregated into a single objective of total expected damages from both the maximum released flows and stored volumes (overall risk index). For each selected parameter set the RFCM is run under a wide range of hydrologic loads (determined through Monte Carlo simulation). The optimal parameter set is obtained through the overall risk index (balanced solution) and then compared with other solutions of the Pareto front. The proposed methodology is implemented at three different reservoirs in the southeast of Spain. The results obtained show that the balanced solution offers a good compromise between the two main objectives of reservoir flood control management.
Psychometric properties of the Spanish validation of the Five Facets of Mindfulness Questionnaire (FFMQ)
Cebolla,A.; García-Palacios,A.; Soler,J.; Guillen,V.; Ba?os,R.; Botella,C.;
The European Journal of Psychiatry , 2012, DOI: 10.4321/S0213-61632012000200005
Abstract: background and objectives: mindfulness-based therapies have demonstrated effectiveness in many clinical contexts. various therapies that train mindfulness skills have proliferated in recent years. there is increasing interest in mindfulness-based therapies and in incorporating instruments that measure mindfulness in order to understand its role in clinical and basic research. the five facets of mindfulness questionnaire (ffmq) is a questionnaire for measuring mindfulness; it was derived from a factor analysis of five different questionnaires that measure a trait-like general tendency to be mindful in daily life. the objective of this study is to validate the ffmq in a spanish sample. methods: the ffmq was administered to a sample of 462 subjects ranging from 18 to 63 years (x = 27.9; sd = 9.75). the sample was composed by clinical (n = 146) and non-clinical (n = 226) subsamples. results: the internal reliability of the scales ranged from acceptable to very good. convergent analysis was conducted by computing pearson's correlations, showing high correlations. the factorial structure is the same as that proposed by baer et al. conclusions: the ffmq proved to be an effective instrument for measuring mindfulness in clinical and non-clinical spanish samples.
Psychometric properties of the Spanish validation of the Five Facets of Mindfulness Questionnaire (FFMQ)
A. Cebolla,A. García-Palacios,J. Soler,V. Guillen
The European Journal of Psychiatry , 2012,
Abstract: Background and Objectives: Mindfulness-based therapies have demonstrated effectiveness in many clinical contexts. Various therapies that train mindfulness skills have proliferated in recent years. There is increasing interest in mindfulness-based therapies and in incorporating instruments that measure mindfulness in order to understand its role in clinical and basic research. The Five Facets of Mindfulness Questionnaire (FFMQ) is a questionnaire for measuring mindfulness; it was derived from a factor analysis of five different questionnaires that measure a trait-like general tendency to be mindful in daily life. The objective of this study is to validate the FFMQ in a Spanish sample. Methods: The FFMQ was administered to a sample of 462 subjects ranging from 18 to 63 years (X = 27.9; SD = 9.75). The sample was composed by clinical (n = 146) and non-clinical (n = 226) subsamples. Results: The internal reliability of the scales ranged from acceptable to very good. Convergent analysis was conducted by computing Pearson's correlations, showing high correlations. The factorial structure is the same as that proposed by Baer et al. Conclusions: The FFMQ proved to be an effective instrument for measuring mindfulness in clinical and non-clinical Spanish samples.
Impacto de distintas enfermedades en la calidad de vida relacionada con la salud (CVRS) en una población laboral
Láinez,M. J. A.; Domínguez,M.; Rejas,J.; Arriaza,E.; García-García,M.; Palacios,G.;
Anales de Medicina Interna , 2007, DOI: 10.4321/S0212-71992007000100002
Abstract: foundation and objective: to make a comparative study of the degree of impact of different diseases in the health related quality of life (hrqol) of workers. material and methods: a questionnaire including the measure of hrqol sf-36, was sent by mail and fulfilled by employees of the pfizer company in spain. differences in the impact in hrqol between subjects with and without several characteristics, with less or more degree of work productivity and with and without antecedents of several diseases and current treatment, were assessed by means of statistical tests of u mann-whitney and kruskal-wallis. results: in a sample of 399 valuable subjects, 35.8±6.5 years (mean±standard deviation), with a 63.7% of men, worst hrqol scores in the physical summary component of sf-36 were observed among subjects with history of some disease (52.6±5.9 days versus 55.9±2.6), migraine (46.2±5.9 versus 54.7±4.1), musculoskeletal (49.7±7.2 versus 53.9±5.1) and digestive diseases (51.5±6.6 versus 54.1±4.9), and/or taking some current treatment (50.2±6.4 versus 55.0±4.4); p<0.05 for all comparisons. in the physical summary component of sf-36 worst hrqol scores were observed among subjects with history of some disease (51.4±7.1 versus 53.4±5.9), digestive (49.9±8.3 versus 52.5±6.3) and mental disorders (46.0±8.8 versus 52.4±6.4); p<0.05 for all comparisons. conclusions: the impact of the disease in the hrqol was associated to the type of pathological antecedents, being migraine that hit more negatively in the physical health, and mental disorders in the mental health.
Nonlinear dynamic susceptibilities of interacting and noninteracting nanoparticle systems
P. J?nsson,T. Jonsson,J. L. García-Palacios,P. Svedlindh
Physics , 1998, DOI: 10.1016/S0304-8853(00)00557-6
Abstract: The linear and cubic dynamic susceptibilities of solid dispersions of nano-sized maghemite particles have been measured for three samples with a volume concentration of magnetic particles ranging from 0.3 % to 17 %, in order to study the effect of dipole-dipole interactions. Significant differences between the dynamic response of the three samples are observed. The dynamic susceptibilities of the most dilute sample compare reasonably well with an existing theory for the linear and cubic dynamic susceptibilities of an assembly of noninteracting, uniaxial magnetic particles. The nonlinear dynamic response of the most concentrated sample exhibits at low temperatures some of the features observed in a Ag(11 at.% Mn) spin glass.
Equivalence of Faddeev-Jackiw and Dirac approaches for gauge theories
J. Antonio García,Josep M. Pons
Physics , 1996, DOI: 10.1142/S0217751X97000505
Abstract: The equivalence between the Dirac method and Faddeev-Jackiw analysis for gauge theories is proved. In particular we trace out, in a stage by stage procedure, the standard classification of first and second class constraints of Dirac's method in the F-J approach. We also find that the Darboux transformation implied in the F-J reduction process can be viewed as a canonical transformation in Dirac approach. Unlike Dirac's method the F-J analysis is a classical reduction procedure, then the quantization can be achieved only in the framework of reduce and then quantize approach with all the know problems that this type of procedures presents. Finally we illustrate the equivalence by means of a particular example.
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