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Nomenclatura Unesco > (22) Física

Mostrando recursos 61 - 80 de 71,961

61. La coordinación motriz en la Adolescencia y su relación con el IMC, hábitos de práctica y motivación en E.F: Estudio transversal y longitudinal - Ramón Otero, Irene
En las últimas décadas, ha aumentado el interés de la investigación sobre el desarrollo de la coordinación motriz en la adolescencia por ser una etapa sensible, crítica y crucial para la adquisición de hábitos y conductas saludables de vida. Estos estudios han mostrado que la adquisición de unos niveles óptimos de coordinación y competencia motriz van a ser determinantes para el bienestar del adolescente y van a estar relacionados e influidos por otras dimensiones del desarrollo de la persona. Recientes investigaciones han sacado a la luz datos alarmantes sobre el aumento de problemas de coordinación motriz en la población infantil...

62. Resistencia a la rotura dúctil en uniones soldadas estructurales de acero de construcción - Moreno Pérez, Rafael
El trabajo fin de máster realizado tiene como objetivo verificar cuantitativamente si el riesgo de rotura no dúctil de un detalle estructural de acero de construcción se incrementa significativamente al aplicar un procedimiento de reparación diseñado para corregir una discrepancia con el proyecto en la ejecución de una unión soldada. El detalle estructural es la conexión entre dos pilares de edificación mediante uniones soldadas, el inferior una sección armada y el superior un perfil HEA 400. La metodología seguida en el desarrollo del trabajo ha consistido en realizar ensayos de fractura con probetas extraídas de dos series de réplicas del...

63. Viver e comer bem dos 3 aos 5 : caracterização das crianças do jardim de infância da Biquinha - Cardoso, Bianca Raquel
Introdução: A obesidade é hoje um dos problemas de saúde pública que assola as sociedades ditas desenvolvidas sendo transversal a todas as faixas etárias. Uma criança obesa tem maior probabilidade de vir a ser um adulto obeso, com repercussões inerentes na saúde e compromisso da sua longevidade. A família evidencia-se como um pilar fundamental para as crianças no que concerne à aquisição de hábitos e comportamentos saudáveis. Objetivo: Caraterizar as crianças de uma instituição de ensino pré-escolar – Creche e Jardim de Infância da Biquinha - quanto ao género e dados antropométricos. Identificar a frequência de crianças com excesso de peso e obesidade. Identificar a perceção parental relativamente à...

64. A mulher mastectomizada : o enfermeiro de reabilitação na promoção do autocuidado - Camões, Maria João
O cancro da mama e os tratamentos que lhe estão associados afetam a condição de saúde física, psicológica e social da mulher, com compromisso do autocuidado. No âmbito do seu exercício profissional compete aos profissionais de enfermagem, e particularmente aos da área de enfermagem de reabilitação a promoção do autocuidado no sentido de promover o bem-estar e qualidade de vida. Objetivos: conhecer as intervenções de enfermagem de reabilitação implementadas à mulher submetida a mastectomia; identificar as principais dificuldades encontradas pelos enfermeiros na sua implementação; analisar as sugestões dos enfermeiros de reabilitação relativamente às intervenções implementadas e refletir sobre o papel da...

65. On twistor solutions of the DKP equation - Guil Guerrero, Francisco; Mañas Baena, Manuel; Martínez Alonso, Luis
The factorization problem for the group of canonical transformations close to the identity and the corresponding twistor equations for an ample family of canonical variables are considered. A method to deal with these reductions is developed for the construction of classes of nontrivial solutions of the dKP equation.

66. On the r-th dispersionless Toda hierarchy I: Factorization problem, symmetries and some solutions - Mañas Baena, Manuel
For a family of Poisson algebras, parametrized by r is an element of Z, and an associated Lie algebraic splitting, we consider the factorization of given canonical transformations. In this context, we rederive the recently found rth dispersionless modified KP hierarchies and rth dispersionless Dym hierarchies, giving a new Miura map among them. We also found a new integrable hierarchy which we call the rth dispersionless Toda hierarchy. Moreover, additional symmetries for these hierarchies are studied in detail and new symmetries depending on arbitrary functions are explicitly constructed for the rth dispersionless KP, rth dispersionless Dym and rth dispersionless Toda...

67. S-functions, reductions and hodograph solutions of the r-th dispersionless modified KP and Dym hierarchies - Mañas Baena, Manuel
We introduce an S-function formulation for the recently found rth dispersionless modified KP and rth dispersionless Dym hierarchies, giving also a connection of these S-functions with the Orlov functions of the hierarchies. Then, we discuss a reduction scheme for the hierarchies that together with the S-function formulation leads to hodograph systems for the associated solutions. We consider also the connection of these reductions with those of the dispersionless KP hierarchy and with hydrodynamic-type systems. In particular, for the one-component and two-component reduction we derive, for both hierarchies, ample sets of examples of explicit solutions.

68. On the Whitham hierarchy: dressing scheme, string equations and additional symmetries - Mañas Baena, Manuel; Medina, Elena; Martínez Alonso, Luis
A new description of the universal Whitham hierarchy in terms of a factorization problem in the Lie group of canonical transformations is provided. This scheme allows us to give a natural description of dressing transformations, string equations and additional symmetries for the Whitham hierarchy. We show how to dress any given solution and prove that any solution of the hierarchy may be undressed, and therefore comes from a factorization of a canonical transformation. A particularly important function, related to the tau-function, appears as a potential of the hierarchy. We introduce a class of string equations which extends and contains previous...

69. Generating quadrilateral and circular lattices in KP theory - Doliwa, Adam; Mañas Baena, Manuel; Martínez Alonso, Luis
The bilinear equations of the N-component KP and BKP hierarchies and a corresponding extended Miwa transformation allow us to generate quadrilateral and circular lattices from conjugate and orthogonal nets, respectively. The main geometrical objects are expressed in terms of Baker functions.

70. Scaling self-similar formulation of the string equations of the hermitian one-matrix model - Mañas Baena, Manuel
The string equation appearing in the double scaling limit of the Hermitian one–matrix model, which corresponds to a Galilean self–similar condition for the KdV hierarchy, is reformulated as a scaling self–similar condition for the Ur–KdV hierarchy. A non– scaling limit analysis of the one–matrix model has led to the complexified NLS hierarchy and a string equation. We show that this corresponds to the Galilean self– similarity condition for the AKNS hierarchy and also its equivalence to a scaling self– similar condition for the Heisenberg ferromagnet hierarchy.

71. String equations for the unitary matrix model and the periodic flag manifold - Mañas Baena, Manuel; Guha, Partha
The periodic flag manifold (in the Sato Grassmannian context) description of the modified Korteweg-de Vries hierarchy is used to analyse the translational and scaling self-similar solutions of this hierarchy. These solutions are characterized by the string equations appearing in the double scaling limit of the symmetric unitary matrix model with boundary terms. The moduli space is a double covering of the moduli space in the Sato Grassmannian for the corresponding self-similar solutions of the Korteweg-de Vries hierarchy, i.e. of stable 2D quantum gravity. The potential modified Korteweg-de Vries hierarchy, which can be described in terms of a line bundle over...

72. AKNS hierarchy, self-similarity, string equations and the Grassmannian - Guil Guerrero, Francisco; Mañas Baena, Manuel
In this paper the Galilean, scaling and translational self-similarity conditions for the AKNS hierarchy are analysed geometrically in terms of the infinite-dimensional Grassmannian. The string equations of the one-matrix model correspond to the Galilean self-similarity condition for this hierarchy. We describe, in terms of the initial data for the zero-curvature 1 -form of the AKNS hierarchy, the moduli space of these self-similar solutions in the Sato Grassmannian. As a by-product we characterize the points in the Segal-Wilson Grassmannian corresponding to the Sachs rational solutions of the AKNS equation and to the Nakamura-Hirota rational solutions of the NLS equation.

73. Bounds on the density of sources of ultra-high energy cosmic rays from the Pierre Auger Observatory. - Arqueros Martínez, Fernando; Blanco Ramos, Francisco; García Pinto, Diego; Minaya Flores, Ignacio Andrés; Ortiz Ramis, Montserrat; Rosado Vélez, Jaime; Vázquez Peñas, José Ramón
We derive lower bounds on the density of sources of ultra-high energy cosmic rays from the lack of significant clustering in the arrival directions of the highest energy events detected at the Pierre Auger Observatory. The density of uniformly distributed sources of equal intrinsic intensity was found to be larger than similar to (0.06 - 5) x 10(-4) Mpc(-3) at 95% CL, depending on the magnitude of the magnetic defections. Similar bounds, in the range (0.2 - 7) x 10(-4) Mpc(-3), were obtained for sources following the local matter distribution.

74. Additional symmetries and solutions of the dispersionless KP hierarchy - Martínez Alonso, Luis; Mañas Baena, Manuel
The dispersionless KP hierarchy is considered from the point of view of the twistor formalism. A set of explicit additional symmetries is characterized and its action on the solutions of the twistor equations is studied. A method for dealing with the twistor equations by taking advantage of hodograph type equations is proposed. This method is applied for determining the orbits of solutions satisfying reduction constraints of Gelfand-Dikii type under the action of additional symmetries.

75. Possible new resonance from W_L W_L-hh interchannel coupling - Delgado López, Rafael; Dobado González, Antonio; Llanes Estrada, Felipe José
We propose and theoretically study a possible new resonance caused by strong coupling between the Higgs-Higgs and the W_LW_L (Z_L Z_L) scattering channels, without regard to the intensity of the elastic interaction in either channel at low energy (that could be weak as in the standard model). We expose this channel-coupling resonance from unitarity and dispersion relations encoded in the inverse amplitude method, applied to the electroweak chiral Lagrangian with a scalar Higgs boson.

76. Auditoría energética: Aplicación en centro docente "Ramón Laporta" de Quart de Poblet. - NOFUENTES PRIETO, ÁLVARO
[ES] Partiendo de la toma de datos de todos los parámetros del edificio relacionados con el consumo de energía, realizar un diagnóstico y planteamiento de medidas de mejora, con el análisis detallado de las relacionadas con la climatización del edificio desde los puntos de factibilidad física/técnica y económica. Determinación de la calificación energética del edificio y los niveles de mejora.

77. Estudio de las relaciones de Gordonia con parámetros operacionales y físico-químicos en EDAR de la Comunidad Valenciana - Nuñez Cabezas, Jose Miguel
[EN] Hundreds of thousands of different types of microorganisms grow in conventional wastewater treatment processes which, when found in biological reactors, constitute real ecosystems. These exhibit changing dynamics due to the characteristics of the effluent, environmental factors and others which are specific to the species of that ecosystem. Sludge population dynamics evolve extremely quickly as those microorganisms that compose them develop new generations in days and sometimes within hours. Population imbalances can cause many problems in the development of purification processes, ranging from the inability of the sludge settleability, to foaming, which eventually alters the desired effluent quality. Foaming occurs in...

78. Estudio de características físicas, biológicas y de movilidad de Semanotus laurasii (Lucas, 1851) (Coleoptera: Cerambycidae - Martínez Blay, Victoria
[EN] Semanotus laurasii (Lucas, 1851) (Coleoptera: Cerambycidae) is a bark borer that has been identified causing important damage to Cupressaceae in the city of Valencia. Larvae feed producing subcortical galleries that can lead to the collapse of the trees. Lack of information about important traits of this cerambycid, such as biology and its flying abilities and dispersion, makes necessary to deepen in these aspects in order to can improve the strategies for controlling this pest. The objectives of this study focus on analyzing the variability in adult sizes of S. laurasii, expand our knowledge on its reproductive traits and study...

79. Provisión de infraestructura pública en medio urbano de baja densidad. Marco institucional, financiación y costes - Prieto, Ángel M.; Consejo Superior de Investigaciones Científicas; Zofío, José L.; Universidad Autónoma de Madrid; Álvarez, Inmaculada; Universidad Autónoma de Madrid
Este trabajo plantea la provisión de infraestructura pública local desde una perspectiva técnica y económica en asentamientos urbanos, municipios, que bajo el denominador de “áreas dispersas”, se catalogan como desfavorecidas por la Unión Europea y excéntricas y/o remotas por la OCDE y desfavorecidas, periféricas y en peligro real de despoblamiento por el saber popular. Analiza cómo se comportan los municipios en la provisión de infraestructura física, las trasferencias del Estado para financiarlas y la racionalidad de la provisión mediante funciones de costes con el objeto de obtener tamaños mínimos y densidades deseables u óptimas para la provisión de infraestructura básica...

80. Estudio de genes KIR y HLA-C y de polimorfismos de citoquinas en pacientes con psoriasis - Pardo Sánchez, José
La psoriasis es una enfermedad de curso crónico caracterizada por la presencia de lesiones cutáneas eritemato-escamosas, y constituye uno de los procesos dermatológicos más frecuentes. Su curso clínico es dinámico e impredecible, y en algunos casos el impacto emocional y físico en el paciente que la sufre puede ser muy importante. Su inmunopatología se basa en mecanismos complejos, donde intervienen tanto una respuesta inmunitaria adaptativa, mediada fundamentalmente por células TH17, como innata, con la participación de elementos como el TNF-α o los receptores KIR (del inglés, Killer Immunoglobulin-like Receptors). Estos receptores son expresados fundamentalmente por las células NK, y su...

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