Population genetic and dispersal modeling data for Bathymodiolus mussels from the Mid-Atlantic Ridge

The zip folder comprises a text file and a gzipped tar archive. 1) The text file contains individual genotype data for 90 SNPs, 9 microsatellites and the mitochondrial ND4 gene that were determined in deep-sea hydrothermal vent mussels from the Mid-Atlantic Ridge (genus Bathymodiolus). Mussel specimens are grouped according to the population (pop)/location from which they have been sampled (first column). The remaining columns contain the respective allele/haplotype codes for the different genetic loci (names in the header line). The data file is in CONVERT format and can be directly transformed into different input files for population genetic statistics. 2) The tar archive contains NetCDF files with larval dispersal probabilities for simulated annual larval releases between 1998 and 2007. For each simulated vent location (Menez Gwen, Lucky Strike, Rainbow, Vent 1-10) two NetCDF files are given, one for an assumed pelagic larval duration of 1 year and the other one for an assumed pelagic larval duration of 6 months (6m).

Physical and mathematical modeling of wave propagation in the Ariane 5 VEB structure

The separation of the lower stage of the ARIANE 5 Vehicle Equipment Bay (VEB) Structure is to be done using a pyrotechnic device. The wave propagation effects produced by the explosion can affect the electronic equipment, so it was decided to analyze, using both physical and numerical modeling, a small piece of the structure to determine the distribution of the accelerations and the relative importance of damping, stiffness, connections, etc. on the response of the equipment.

Counting Highly Cited Papers for University Research Assessment: Conceptual and Technical Issues

A Kuhnian approach to research assessment requires us to consider that the important scientific breakthroughs that drive scientific progress are infrequent and that the progress of science does not depend on normal research. Consequently, indicators of research performance based on the total number of papers do not accurately measure scientific progress. Similarly, those universities with the best reputations in terms of scientific progress differ widely from other universities in terms of the scale of investments made in research and in the higher concentrations of outstanding scientists present, but less so in terms of the total number of papers or citations. This study argues that indicators for the 1% high-citation tail of the citation distribution reveal the contribution of universities to the progress of science and provide quantifiable justification for the large investments in research made by elite research universities. In this tail, which follows a power low, the number of the less frequent and highly cited important breakthroughs can be predicted from the frequencies of papers in the upper part of the tail. This study quantifies the false impression of excellence produced by multinational papers, and by other types of papers that do not contribute to the progress of science. Many of these papers are concentrated in and dominate lists of highly cited papers, especially in lower-ranked universities. The h-index obscures the differences between higher- and lower-ranked universities because the proportion of h-core papers in the 1% high-citation tail is not proportional to the value of the h-index.

Mathematical and Numerical Modeling in Maritime Geomechanics

A theoretical and numerical framework to model the foundation of marine offshore structures is presented. The theoretical model is composed by a system of partial differential equations describing coupling between seabed solid skeleton and pore fluids (water, air, oil,…) combined with a system of ordinary differential equations describing the specific constitutive relation of the seabed soil skeleton. Once the theoretical model is described, the finite element numerical procedure to achieve an approximate solution of the governing equations is outlined. In order to validate the proposed theoretical and numerical framework the seaward tilt mechanism induced by the action of breaking waves over a vertical breakwater is numerically reproduced. The results numerically attained are in agreement with the main conclusions drawn from the literature associated with this failure mechanism

Development of a wake model for wind farms based on an open source CFD solver. Strategies on parabolization and turbulence modeling

Wake effect represents one of the most important aspects to be analyzed at the engineering phase of every wind farm since it supposes an important power deficit and an increase of turbulence levels with the consequent decrease of the lifetime. It depends on the wind farm design, wind turbine type and the atmospheric conditions prevailing at the site. Traditionally industry has used analytical models, quick and robust, which allow carry out at the preliminary stages wind farm engineering in a flexible way. However, new models based on Computational Fluid Dynamics (CFD) are needed. These models must increase the accuracy of the output variables avoiding at the same time an increase in the computational time. Among them, the elliptic models based on the actuator disk technique have reached an extended use during the last years. These models present three important problems in case of being used by default for the solution of large wind farms: the estimation of the reference wind speed upstream of each rotor disk, turbulence modeling and computational time. In order to minimize the consequence of these problems, this PhD Thesis proposes solutions implemented under the open source CFD solver OpenFOAM and adapted for each type of site: a correction on the reference wind speed for the general elliptic models, the semi-parabollic model for large offshore wind farms and the hybrid model for wind farms in complex terrain. All the models are validated in terms of power ratios by means of experimental data derived from real operating wind farms.

Participatory design and business modeling

En este proyecto miraremos como los campos de Diseño Participativo de las tecnologías de la información (DP, Participatory IT Design) y el diseño empresarial de modelos de negocio interactúan entre sí. Exploraremos el hueco que existe en los asuntos que aborda un proyecto de DP señalado por Kyng (2010). DP es una forma de enfocar el diseño para diseñar sistemas informáticos que tiene su propia ideología, haciendo mucho hincapié en la participación de los usuarios en el proceso. Esta ideología propia de DP da paso a un conjunto de métodos y herramientas para diseñar. DP tiene sus orígenes en Escandinavia en la década de los setenta cuando cambios de progreso social de la sociedad se introdujeron en el lugar de trabajo. Ya hay algunos investigadores del campo de DP que empiezan a estudiar este hueco señalado por Kyng. Un modelo de negocios es la forma en que un negocio crea, entrega y captura valor. En las últimas décadas las empresas informáticas han cambiado su modelo de negocios, transformándose en una oferta de servicios informáticos mayoritariamente. El mundo empresarial ya conoce los beneficios de las metodologías de diseño orientadas al usuario, sin embargo no acaban de ser adoptadas por las empresas informáticas. En el proyecto buscamos responder a las preguntas que surgen al juntar estas dos áreas de estudio. ¿Cómo interpreta la comunidad de DP el mundo empresarial? ¿La teoría empresarial como trata la metodología de diseño orientado al usuario? ¿Cómo afecta en una compañía real su política de usuario a su modelo de negocio y que técnicas utilizan para involucrar al usuario? ¿Qué intereses comunes y opuestos existen entre DP y el mundo empresarial? ¿Cuál es el futuro de DP en el mundo empresarial? En cuanto a la metodología del proyecto realice un estudio de la literatura de los campos de DP y el mundo empresarial usando fuentes recomendadas por expertos de cada área así como trabajos encontrados por mi propia cuenta que eran relevantes al tema tratado. Además realice un estudio de compañías desarrolladoras de software locales a Copenhague. Mediante una serie de visitas y entrevistas con esas compañías obtuve información del modelo de negocio y proceso de desarrollo de software de las mismas. También dialogamos en cuanto a su visión de DP y metodologías de diseño orientado al usuario y como se podrían beneficiar de ellas. Durante el desarrollo del proyecto he encontrado que DP y el mundo empresarial tienen dos visiones muy diferentes. Mientras uno busca obtener el máximo beneficio el otro busca apoderar a los usuarios en su área de trabajo. Aunque al igual que DP las empresas necesitan obtener información acerca de los usuario como sus necesidades, gustos, etc. Está claro que el software producido para el mundo empresarial tiene mucho espacio para mejorar ya que suele venir con manuales de instrucciones extensos y es necesario un entrenamiento previo para su utilización. Un problema importante de la introducción de DP en las empresas es la falta de predisposición de los usuarios en colaborar en el proceso de desarrollo ya que no hay demasiada tendencia a usuarios a dar feedback. El trabajo de investigacion de Timpka y Vimarlund (1998) Participatory Design In Economic Terms: A Theoretical Discussion llega a la conclusión de que DP es económicamente favorable para los desarrolladores. Pero omite muchos factores críticos de la economía de una empresa. En cuanto al futuro de DP en el mundo empresarial, DP tiene que adaptarse a las compañías desarrolladoras de software. A sus necesidades y teniendo en cuenta sus límites de recursos. Pero hay ciertos aspectos que deben ser abordados. El primer aspecto es el uso de recursos en las técnicas de DP, ya que utilizan demasiados. Otro aspecto que debería abordar es el uso de las nuevas tecnologías de comunicación y redes sociales, ya que apenas se han utilizado en DP. Mientras que otras áreas de estudio han hecho uso de estas nuevas tecnologías y se han revolucionado DP no ha sido capaz de integrarlas en sus técnicas. Por último en el proyecto realizo una comparativa del actual modelo de negocios y proceso de desarrollo de software de la compañía Forecast.it. En esta comparativa miro como cambiaria el negocio en el caso de que se produjeran cambios en ella al introducir la ideología de DP. Donde más se notan los cambios seria en su esquema de desarrollo de software ya que habría que hacer hueco para nuevos factores y pasos.

Mutational analysis and molecular modeling of the nonapeptide hormone binding domains of the [Arg8]vasotocin receptor.

To identify determinants that form nonapeptide hormone binding domains of the white sucker Catostomus commersoni [Arg8]vasotocin receptor, chimeric constructs encoding parts of the vasotocin receptor and parts of the isotocin receptor have been analyzed by [(3,5-3H)Tyr2, Arg8]vasotocin binding to membranes of human embryonic kidney cells previously transfected with the different cDNA constructs and by functional expression studies in Xenopus laevis oocytes injected with mutant cRNAs. The results indicate that the N terminus and a region spanning the second extracellular loop and its flanking transmembrane segments, which contains a number of amino acid residues that are conserved throughout the nonapeptide receptor family, contribute to the affinity of the receptor for its ligand. Nonapeptide selectivity, however, is mainly defined by transmembrane region VI and the third extracellular loop. These results are complemented by a molecular model of the vasotocin receptor obtained by aligning its sequence with those of other G-protein coupled receptors as well as that of bacteriorhodopsin. The model indicates that amino acid residues of transmembrane regions II-VII that are located close to the extracellular surface also contribute to the binding of vasotocin.

Physical characterization and numerical modeling of a WEST-like tokamak divertor plasma

Il presente elaborato è incentrato sulla modellizzazione del plasma di bordo nei dispositivi per la produzione di energia da fusione nucleare noti come tokamak. La tecnologia che nel corso di tutta la seconda metà del XX secolo fino ad oggi è stata sviluppata a questo fine deve necessariamente scontrarsi con alcuni limiti. Nei tokamak il confinamento del plasma è di tipo magnetico e vincola le particelle a muoversi di moto elicoidale all'interno del vessel, tuttavia il confinamento non risulta perfetto e parte dell'energia si scarica sulle pareti della camera, rischiando pertanto di fondere i materiali. Alcune strategie possono essere messe in atto per limitare questo problema, per esempio agendo sulla geometria del tokamak, oppure sulla fisica, inducendo nel plasma una data concentrazione di impurezze che ionizzino irraggiando parte dell'energia di plasma. Proprio tale meccanismo di perdita è stato simulato in un modello monodimensionale di plasma monofluido di bordo. I risultati del codice numerico relativo al modello dimostrano che per concentrazioni di impurezze crescenti è possibile diminuire in modo significativo flusso di calore e temperatura al divertore. Per di più risulta possibile controllare la posizione del fronte di irraggiamento per mezzo di parametri di controllo del plasma quali la pressione. Si osserva inoltre l'insorgere del cosiddetto fenomeno di biforcazione alle basse temperature di divertore, fenomeno in cui il plasma si comporta in modo instabile a causa di fenomeni fisici tipici delle basse energie ("detachment") e a seguito del quale può improvvisamente spegnersi (disruzione). Infine lo stesso modello è stato migliorato inserendo l'ipotesi di plasma bifluido. Anche per gli ioni viene osservato il fenomeno di biforcazione. I risultati numerici evidenziano le dinamiche dello scambio energetico fra le specie gettando le basi di una progettazione efficiente della chimica del plasma finalizzata al raffreddamento del divertore.

Results of a joint U.S.A./U.S.S.R. hydrodynamic and transport modeling project /

"February 1979."

Arithmetic unit of Illiac III: simulation and logical design, part II,

Pt 1, by Daniel E. Atkins, issued as File no. 713 of the University of Illinois Dept. of Computer Science in 1966.

Grammatical and logical analysis of the English language : for the use of grammar schools, high schools, normal schools and academies /

"In two parts."

Heat transfer and thermodynamic modeling,

"62-11604."