283 resultados para Ruíz, Domingo, (Logroño)
Resumo:
The main objective of this paper aims at developing a methodology that takes into account the human factor extracted from the data base used by the recommender systems, and which allow to resolve the specific problems of prediction and recommendation. In this work, we propose to extract the user's human values scale from the data base of the users, to improve their suitability in open environments, such as the recommender systems. For this purpose, the methodology is applied with the data of the user after interacting with the system. The methodology is exemplified with a case study
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In the B-ISDN there is a provision for four classes of services, all of them supported by a single transport network (the ATM network). Three of these services, the connected oriented (CO) ones, permit connection access control (CAC) but the fourth, the connectionless oriented (CLO) one, does not. Therefore, when CLO service and CO services have to share the same ATM link, a conflict may arise. This is because a bandwidth allocation to obtain maximum statistical gain can damage the contracted ATM quality of service (QOS); and vice versa, in order to guarantee the contracted QOS, the statistical gain have to be sacrificed. The paper presents a performance evaluation study of the influence of the CLO service on a CO service (a circuit emulation service or a variable bit-rate service) when sharing the same link
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This paper focuses on one of the methods for bandwidth allocation in an ATM network: the convolution approach. The convolution approach permits an accurate study of the system load in statistical terms by accumulated calculations, since probabilistic results of the bandwidth allocation can be obtained. Nevertheless, the convolution approach has a high cost in terms of calculation and storage requirements. This aspect makes real-time calculations difficult, so many authors do not consider this approach. With the aim of reducing the cost we propose to use the multinomial distribution function: the enhanced convolution approach (ECA). This permits direct computation of the associated probabilities of the instantaneous bandwidth requirements and makes a simple deconvolution process possible. The ECA is used in connection acceptance control, and some results are presented
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This paper proposes a multicast implementation based on adaptive routing with anticipated calculation. Three different cost measures for a point-to-multipoint connection: bandwidth cost, connection establishment cost and switching cost can be considered. The application of the method based on pre-evaluated routing tables makes possible the reduction of bandwidth cost and connection establishment cost individually
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The authors focus on one of the methods for connection acceptance control (CAC) in an ATM network: the convolution approach. With the aim of reducing the cost in terms of calculation and storage requirements, they propose the use of the multinomial distribution function. This permits direct computation of the associated probabilities of the instantaneous bandwidth requirements. This in turn makes possible a simple deconvolution process. Moreover, under certain conditions additional improvements may be achieved
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In Catalonia, according to the nitrate directive (91/676/EU), nine areas have been declared as vulnerable to nitrate pollution from agricultural sources (Decret 283/1998 and Decret 479/2004). Five of these areas have been studied coupling hydro chemical data with a multi-isotopic approach (Vitòria et al. 2005, Otero et al. 2007, Puig et al. 2007), in an ongoing research project looking for an integrated application of classical hydrochemistry data, with a comprehensive isotopic characterisation (δ15N and δ18O of dissolved nitrate, δ34S and δ18O of dissolved sulphate, δ13C of dissolved inorganic carbon, and δD and δ18O of water). Within this general frame, the contribution presented explores compositional ways of: (i) distinguish agrochemicals and manure N pollution, (ii) quantify natural attenuation of nitrate (denitrification), and identify possible controlling factors.To achieve this two-fold goal, the following techniques have been used. Separate biplots of each suite of data show that each studied region has a distinct δ34S and pH signatures, but they are homogeneous with regard to NO3- related variables. Also, the geochemical variables were projected onto the compositional directions associated with the possible denitrification reactions in each region. The resulting balances can be plot together with some isotopes, to assess their likelihood of occurrence
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L’estemsiliosi de la perera és una malaltia fúngica d’una gran importància econòmica a la zona del centre i sud d’Europa. És comparable al motejat de la pomera i pot arribar a assolir el 90 % de pèrdues en pressions elevades de la malaltia. S’ha comprovat que els tractaments amb fungicides presenten una eficàcia de control limitada, i que les mesures sanitàries i de control biològic generen resultats que plantegem com a una eina més a utilitzar en en la integració de mètodes de control. L’objectiu del treball és determinar l’eficàcia de control de Stemphylium vesicarium a partir de diferents soques de Bacilus subtilis en assatjos en situacions controlades
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Estudio descriptivo de los principales motivos de ingreso y síntomas más frecuentes del paciente oncológico. Se obtienen datos demográficos, clínicos y patológicos del paciente; así como el principal motivo de ingreso y la sintomatología que asocia. Resultados: El principal motivo de ingreso han sido las complicaciones derivadas de la neoplasia (56%), siendo el dolor mal controlado la principal causa. La sintomatología más prevalente ha sido la sequedad bucal (63%), dolor (60%) y la anorexia (55%). El dolor fue considerado el síntoma principal, sin embargo, el 63% de los pacientes que presentaban dolor, estaba mal o muy mal controlado (EVA>4).
Resumo:
Estudi descriptiu dels principals motius d´ingrés i símptomes més freqüents del pacient oncològic. S´obtenen dades demogràfiques, clíniques i patològiques del pacient; així com el principal motiu d´ingrés i la simptomatologia que associa. Resultats: El principal motiu d´ingrés han estat les complicacions derivades de la neoplàsia (84 %), sent el dolor mal controlat la principal causa. La simptomatologia més prevalent ha estat l´anorèxia (69 %), dolor (60 %) i la perduda de pes (40 %). El dolor va ser considerat el símptoma principal, no obstant això, el 60 % dels pacients que presentaven dolor, estava mal o molt mal controlat (EVA>4).
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We developed a procedure that combines three complementary computational methodologies to improve the theoretical description of the electronic structure of nickel oxide. The starting point is a Car-Parrinello molecular dynamics simulation to incorporate vibrorotational degrees of freedom into the material model. By means ofcomplete active space self-consistent field second-order perturbation theory (CASPT2) calculations on embedded clusters extracted from the resulting trajectory, we describe localized spectroscopic phenomena on NiO with an efficient treatment of electron correlation. The inclusion of thermal motion into the theoretical description allowsus to study electronic transitions that, otherwise, would be dipole forbidden in the ideal structure and results in a natural reproduction of the band broadening. Moreover, we improved the embedded cluster model by incorporating self-consistently at the complete active space self-consistent field (CASSCF) level a discrete (or direct) reaction field (DRF) in the cluster surroundings. The DRF approach offers an efficient treatment ofelectric response effects of the crystalline embedding to the electronic transitions localized in the cluster. We offer accurate theoretical estimates of the absorption spectrum and the density of states around the Fermi level of NiO, and a comprehensive explanation of the source of the broadening and the relaxation of the charge transferstates due to the adaptation of the environment
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S'analitza la usabilitat de diverses pàgines web d'inici d'àmbit català en diferents sectors com televisió, institucions, diaris, etc.
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Desenvolupament d'un sistema consistent en un software per la recopilació de dades GPS per a Windows Mobile, un servidor de comunicacions, un server web i una plana web de consulta de les posicions en temps real de les PDA's.
Resumo:
Este proyecto estudia la tecnología Radio Cognitiva. El concepto clave de esta tecnología es que permite a usuarios sin licencia compartir el espectro radioeléctrico de forma oportunista con los usuarios con licencia. Para empezar, se analizarán las características principales, su funcionamiento y como coexisten con los usuarios principales. Más adelante, se explicaran los métodos que se usan para la gestión del espectro radioeléctrico y las actividades de estandarización para la implementación de las redes de radio cognitiva. Por último, se analizara la posibilidad de la implementación de esta tecnología en España, analizando las ventajas e inconvenientes de inicializar un mercado secundario del espectro radioeléctrico.
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Four methods were tested to assess the fire-blight disease response on grafted pear plants. The leaves of the plants were inoculated with Erwinia amylovora suspensions by pricking with clamps, cutting with scissors, local infiltration, and painting a bacterial suspension onto the leaves with a paintbrush. The effects of the inoculation methods were studied in dose-time-response experiments carried out in climate chambers under quarantine conditions. A modified Gompertz model was used to analyze the disease-time relatiobbnships and provided information on the rate of infection progression (rg) and time delay to the start of symptoms (t0). The disease-pathogen-dose relationships were analyzed according to a hyperbolic saturation model in which the median effective dose (ED50) of the pathogen and maximum disease level (ymax) were determined. Localized infiltration into the leaf mesophile resulted in the early (short t0) but slow (low rg) development of infection whereas in leaves pricked with clamps disease symptoms developed late (long t0) but rapidly (high rg). Paintbrush inoculation of the plants resulted in an incubation period of medium length, a moderate rate of infection progression, and low ymax values. In leaves inoculated with scissors, fire-blight symptoms developed early (short t0) and rapidly (high rg), and with the lowest ED50 and the highest ymax
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Aquest treball parteix de l’anàlisi de les dades sobre informes d’adequació de l’habitatge per a l’obtenció d’una autorització de reagrupament familiar realitzats per l’Ajuntament de Barcelona des de 2005 fins 2009, i del registre administratiu de les sol•licituds de reagrupament familiar presentades a les quatre subdelegacions del Govern a Catalunya des de 2004 fins 2010. Per a procedir a la seva anàlisi s’ha hagut de fer un important treball de depuració, harmonització i anonimització d’unes dades procedents de registres administratius no pensades per la seva explotació estadística. L’anàlisi demogràfica ha posat en relleu la importància dels rols de gènere en les estratègies familiars que acabaran conformant el perfil sociodemogràfic tant de les persones reagrupades com de les reagrupadores. També s’ha pogut veure com no hi ha una relació directa entre les persones estrangeres residents en cada municipi i les pautes de reagrupament familiar. La davallada del reagrupament familiar és deguda en bona part a la crisi econòmica, no obstant per a entendre la seva evolució en conjunt cal tenir en compte a més els factors legislatius (la Normalització del 2005 que explica el creixement de 2006 i 2007, però també l’entrada dels romanesos a la UE en 2007), així com la pròpia dinàmica familiar de la població immigrada, amb un esgotament del potencial reagrupadors per a les nacionalitats que precisament protagonitzaren el boom migratori (llatinoamericans). La legislació en matèria de reagrupament familiar s’ha basat en tres principis que han tingut un efecte indubtable i de vegades contrari a l’esperat: 1) la discriminació entre raons econòmiques i familiars en les migracions; 2) La restricció del dret de reagrupar a la definició nuclear de la família; i, 3) L’assumpció de la formació pre-migratòria de la família a reagrupar. Els resultats d’aquest informe aporten indicis que aquesta aproximació apriorística ha tingut efectes perversos, començant pel volum considerable de reagrupacions de facto.