84 research outputs found
Calibration of the X-ray Diffraction Technique in Measuring In-service Stresses in Corrugated Steel Bars
[EN]The X-ray diffraction technique for determining residual stresses in construction steels has been commonly used in the international scientific community for decades. Taking advantage of the concepts on which the technique is based, the authors have previously calibrated and used the technique for the in situ determination of the stress states of metallic structures in service. This article presents an advance in the latter utility by means of the laboratory calibration of the X-ray diffraction technique in corrugated steel. The interaction between radiation and steel is complex, so, in the scientific community, it is considered pertinent to resort to empirical and experimental calibration processes. Two bars of corrugated steel were subjected to increasing tensile loads. The load states introduced in the testing machine were compared with those determined by X-ray diffraction. The correlation between the values of the loads applied and those determined by the proposed technique is excellent. The experimental conditions of the calibration tests are precisely detailed so that they are easily reproducible. This work represents a necessary first step in employing the technique in the buildings or civil works.Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. National R&D Plan of the Government of Spain and the University of the Basque Country (UPV/EHU). PES 11/32
Localized nonlinear waves in systems with time- and space-modulated nonlinearities
Using similarity transformations we construct explicit nontrivial solutions
of nonlinear Schr\"odinger equations with potentials and nonlinearities
depending on time and on the spatial coordinates. We present the general theory
and use it to calculate explicitly non-trivial solutions such as periodic
(breathers), resonant or quasiperiodically oscillating solitons. Some
implications to the field of matter-waves are also discussed
Drogodependencias: XX Curso de Actualización para Postgraduados en Farmacia
El consumo de drogas es un fenómeno multicausal en el que incide una serie de factores del ámbito personal, familiar, social, y cultural.
En los últimos años, asistimos a cambios tanto en la oferta de drogas como en los patrones de consumo. Así, mientras en los años 80 y primeros 90 la droga emblemática era la heroína, hoy en día su consumo se ha estabilizado, e incluso ha disminuido. Las nuevas formas de estar en sociedad afectan a grupos de jóvenes aceptablemente integrados en su medio familiar y social. A día de hoy, debe considerarse el consumo de otras drogas, fundamentalmente las llamadas drogas de síntesis, y la adopción de nuevos patrones en el consumo de algunas ya establecidas, como es el alcohol.
En este marco se está haciendo frente al fenómeno del consumo de drogas desde diferentes perspectivas que se extienden desde la investigación científica hasta la prevención, la reducción de daños y
la asistencia al drogodependiente.
Entre las estrategias del nuevo Plan Nacional Sobre Drogas (PND) destaca la de normalizar las redes asistenciales a drogodependientes,
integrándolas de forma coordinada en los sistemas públicos de salud y sistemas sociales. Se pretende que los diferentes
recursos que formen parte del denominado sistema de asistencia e integración social de drogodependientes se caractericen por su profesionalización, interdisciplinariedad y fácil accesibilidad.
En este sentido, hay que destacar la participación activa de algunos profesionales farmacéuticos en distintos programas de actuación, prevención y reducción de daños producidos por drogas. Por otra parte, se están realizando esfuerzos importantes en la investigación básica y clínica dirigidos a desentrañar los mecanismos que operan en la adicción a drogas.
Los capítulos que componen este texto son el resultado del trabajo coordinado entre investigadores, docentes, farmacéuticos comunitarios, psicólogos, psiquiatras y otros profesionales implicados en la problemática de las drogodependencias. Su lectura permitirá conocer la actual situación respecto al consumo de drogas, los mecanismos
neurobiológicos implicados en la drogadicción, la farmacología y la toxicología de las diferentes drogas, los riesgos asociados a su consumo, y los recursos disponibles que atienden a la población drogodependiente.
Agradecemos la participación de los profesionales que asisten desde diferentes ámbitos a las personas afectadas directa o indirectamente por los problemas derivados del consumo de drogas, que ha hecho posible integrar aspectos básicos y prácticos de un tema tan complejo como es el de las drogodependencias
Stability and collapse of localized solutions of the controlled three-dimensional Gross-Pitaevskii equation
On the basis of recent investigations, a newly developed analytical procedure
is used for constructing a wide class of localized solutions of the controlled
three-dimensional (3D) Gross-Pitaevskii equation (GPE) that governs the
dynamics of Bose-Einstein condensates (BECs). The controlled 3D GPE is
decomposed into a two-dimensional (2D) linear Schr\"{o}dinger equation and a
one-dimensional (1D) nonlinear Schr\"{o}dinger equation, constrained by a
variational condition for the controlling potential. Then, the above class of
localized solutions are constructed as the product of the solutions of the
transverse and longitudinal equations. On the basis of these exact 3D
analytical solutions, a stability analysis is carried out, focusing our
attention on the physical conditions for having collapsing or non-collapsing
solutions.Comment: 21 pages, 14 figure
Solitary waves for linearly coupled nonlinear Schrodinger equations with inhomogeneous coefficients
Motivated by the study of matter waves in Bose-Einstein condensates and
coupled nonlinear optical systems, we study a system of two coupled nonlinear
Schrodinger equations with inhomogeneous parameters, including a linear
coupling. For that system we prove the existence of two different kinds of
homoclinic solutions to the origin describing solitary waves of physical
relevance. We use a Krasnoselskii fixed point theorem together with a suitable
compactness criterion.Comment: 16 page
La educación interprofesional en la universidad: retos y oportunidades
La educación interprofesional (EIP) es clave para garantizar el aprendizaje integrado de los alumnos de diferentes titulaciones, que ejercerán una labor profesional basada en el cuidado centrado en la persona, de manera conjunta. El proyecto de EIP de la Universidad de Navarra pretende dar a los alumnos de medicina, enfermería y farmacia los conocimientos, habilidades y actitudes necesarias para trabajar de manera interprofesional, centrándonos en trabajo en equipo, conocimiento y respeto de roles, resolución de conflictos y comunicación interprofesional.
Para ello, el equipo de docentes implicados en este proyecto ha tenido que trabajar colaborativamente, experimentando las claves de este trabajo interprofesional, centrado en el alumno, constituyendo una experiencia enriquecedora, constructiva, y que ha aportado las claves del trabajo en equipo necesario para llevar a cabo un proyecto docente de EIP.Interprofessional Education is key to guarantee the integrated learning to different
students, who will exercise together a professional work based on a person-centred care. The
EIP project of the University of Navarra aims to provide to medical, nursing and pharmacy
students with the knowledge, skills and attitudes necessary to work interprofessionally focu-
sing on teamwork, knowledge and respect for roles, conflict resolution and interprofessional
communication.
To achieve this aim, the teachers from the different faculties involved in this project has
worked collaboratively, experiencing the keys of this interprofessional work focused on the
student, constituting an enriching, living a constructive experience and contributing to the
cornerstone of the teamwork necessary to undertake an EIP teaching project
Educación interprofesional: una propuesta de la Universidad de Navarra
La asistencia sanitaria centrada en el paciente es la clave para una atención humana
a la persona y a su familia. La práctica colaborativa en equipos interprofesionales resulta
imprescindible para alcanzar una atención sanitaria de calidad. La universidad tiene la responsabilidad de preparar a sus graduados para trabajar en equipos interprofesionales. Una enseñanza/aprendizaje centrada en la persona, fundamentada en las competencias que definen la educación interprofesional, es clave para que nuestros estudiantes reconozcan la necesidad del trabajo colaborativo. Este artículo detalla un proyecto docente de educación interprofesional de la Universidad de Navarra, donde estudiantes de las facultades de medicina, enfermería y farmacia aprenden juntos y de manera gradual, las claves de cómo trabajar en equipo
Feature selection for automatic analysis of emotional response based on nonlinear speech modeling suitable for diagnosis of Alzheimer׳s disease
Alzheimer׳s disease (AD) is the most common type of dementia among the elderly. This work is part of a larger study that aims to identify novel technologies and biomarkers or features for the early detection of AD and its degree of severity. The diagnosis is made by analyzing several biomarkers and conducting a variety of tests (although only a post-mortem examination of the patients’ brain tissue is considered to provide definitive confirmation). Non-invasive intelligent diagnosis techniques would be a very valuable diagnostic aid. This paper concerns the Automatic Analysis of Emotional Response (AAER) in spontaneous speech based on classical and new emotional speech features: Emotional Temperature (ET) and fractal dimension (FD). This is a pre-clinical study aiming to validate tests and biomarkers for future diagnostic use. The method has the great advantage of being non-invasive, low cost, and without any side effects. The AAER shows very promising results for the definition of features useful in the early diagnosis of AD
The “edge effect” phenomenon: deriving population abundance patterns from individual animal movement decisions
Edge effects have been observed in a vast spectrum of animal populations. They occur where two conjoining habitats interact to create ecological phenomena that are not present in either habitat separately. On the individual-level, an edge effect is a change in behavioral tendency on or near the edge. On the population-level, it is a pattern of population abundance near an edge that cannot be explained in terms of either habitat in isolation. That these two levels of description exist suggests there ought to be a mathematical link between them. Here, we make inroads into providing such a link, deriving analytic expressions describing oft-observed population abundance patterns from a model of movement decisions near edges. Depending on the model parameters, we can see positive, negative, or transitional edge effects emerge. Importantly, the distance over which animals make their decisions to move between habitats turns out to be a key factor in quantifying the magnitude of certain observed edge effects
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