A variable reactant transducer to study the oscillations of a pendulum and the value of local gravity

<p>[EN]We describe a method for studying the classicalexperiment of the simple pendulum, consisting of a body of magnetic material oscillating through a thin conducting coil (magnetic pendulum), which according to Faraday&rsquo;s law of induction generates a fluctuating current in the coil that can be transferred into a periodic signal in an oscilloscope. The set up described here allows to study the motion of the pendulum beyond what is normally considered in more basic settings, including a detailed analysis of both small and large oscillations, and the determination of the value of the acceleration of gravity.</p>

Numerical Model for the Dynamic Analysis of Pile Foundations

Programa de doctorado: Sistemas Inteligentes y Aplicaciones Numéricas en Ingeniería Instituto Universitario (SIANI)

Cuestiones de geografía física

<p>[ES] La presente obra recoge una nutrida relación de preguntas sobre diversos aspectos de la Geografía que los autores se han planteado a lo largo de su ejercicio docente y cuyo planteamiento refleja un estilo reflexivo, muy personal si se quiere, de transmitir las Ciencias de la Tierra. Dos motivos alentaron, desde un primer momento, la redacción de estas páginas; por una parte, la creciente sensibilidad por el medio ambiente, por conocer y comprender los procesos que modifican la geografía terrestre y por otra parte, la excesiva carga descriptiva de la que sigue adoleciendo la ciencia geográfica. Por esta razón, el objetivo propuesto al redactar el libro ha sido racionalizar las principales situaciones descritas por la Geografía Física para abordar su explicación con un enfoque netamente reflexivo. El lector tipo al que se dirige esta obra sería el estudiante de primer año de universidad o último de bachillerato, que curse materias relacionadas con las Ciencias de la Tierra y del Medio Ambiente. Esta circunstancia ha condicionado la metodología seguida y la estructura dada a la obra.</p>

Advances in the study of soil-structure interaction effects on the dynamic response of piled structures

<p>[EN]This Ph. D. thesis presents a simple and stable procedure for the estimation of periods and dampings of pile shear buildings taking soil-structure interaction into account. The coupled-system response is obtained by using a substructuring model. A boundary element-finite element coupling formulation is used to compute impedances and kinematic interaction factors of the pile group configurations under investigation. The proposed procedure is applied to perform parametric analyses to determine the influence of the main parameters of soil-structure interaction problems on the dynamic response of the superstructure. The scope of this thesis also encompasses the study of foundations including battered piles.</p>

Dynamic structure-soil-structure interaction between nearby piled buildings under seismic excitation by BEM-FEM model

<p>[EN]The dynamic throug-soil interaction between nearby pile supported structures in a viscoelastic half-space, under incident S and Rayleigh waves, is numerically studied. To this end, a three-dimensional viscoelastic BEM-FEM formulation for the dynamic analysis of piles and pile groups in the frequency domain is used, where soil is modelled by BEM and piles are simulated by one-dimensional finite elements as Bernouilli beams.</p>

Influence of type wave and angle of incidence on seismic bending moments in pile foundations.

<p>[EN]When analysing the seismic response of pile groups, a vertically-incident wavefiel is usually employed even though it doesnot necessarily correspond to the worst case scenario. This work aims to study the influence of both type of seismic body wave and its angle of incidence on the dynamic response of pile foundations.</p>

On soil-structurae interaction in large non-slender partially buried structures.

<p>[EN]This paper addresses the seismic analysis of a deeply embedded non-slender structure hosting the pumping unit of a reservoir. The dynamic response in this type of problems is usually studied under the assumption of a perfectly rigid structure using a sub-structuring procedure (three-step solution) proposed specifically for this hypothesis.</p>

Structure-soil-structure interaction effects on the dynamic response of piled structures under obliquely-incident seismic shear waves.

<p>[EN] This work studies the structure-soil-structure interaction (SSSI) effects on the dynamic response of nearby piled structures under obliquely-incident shear waves. For this purpose, a three-dimensional, frequency-domain, coupled boundary element-finite (BEM-FEM) model is used to analyse the response of configuration of three buildings aligned parallel to the horizontal component of the wave propagation direction.</p>

Influence of pile inclination angle on the dynamic properties and seismic response of piled structures.

<p>[EN] This paper aims to contribute to clarify whether the use of battered piles has a positive or negative influence on the dynamic response of deep foundations and superstructures. For this purpose, the dynamic response of slender and non-slender structures supported on several configurations of 2X2 and 3X3 pile groups including battered elements is obtained through a procedure based on a substructuring model whick takes soil-structure interaction into account.</p>

Kinematic interaction factors of deep foundations with inclined piles.

<p>[EN]The beneficial or detrimental role of battered piles on the dynamic response of piled foundations has not been yet fully elucidated. In order to shed more light on this aspect, kinematic interaction factors of deep foundations with inclined piles, are provided for single battered piles, as well as for 2X2 and 3X3 groups of piles subjected to vertically incident plane shear S waves.</p>

Effects of soil-structure interaction on the dynamic properties and seismic response of piled structures.

<p>[EN]This paper presents a simple and stable procedure for the estimation of periods and dampings of piled shear buildings taking soil-structure interaction into account. A substructuring methodology that incluedes the three-dimensional character of the foundations is used.</p>

Polimorfismos de los genes TNF, LTA, IL-1RN y TNFR2: papel en la susceptibilidad, gravedad y pronóstico de la neumonía adquirida en la comunidad

Eliminadas las páginas en blanco del pdf

Polimorfismos de los genes "FER Y FoxO3": papel en la susceptibilidad, gravedad y pronóstico de la neumonía adquirida en la comunidad

Programa de doctorado: Avances en Medicina Interna. La fecha de publicación es la fecha de lectura