Electricity microgeneration in pressure hydraulic networks

The aim of this study is to analyze and evaluate the installation of microturbines placed at selected points of water distribution systems to generating electricity from excess and unused hydraulic energy. In order to achieve this objective, we have considered some alternatives to installation in hydraulic pressurized networks of two municipalities in the province of Huelva: Cañaveral de León and Aracena. These water distribution systems are managed by the public company Giahsa. An economic feasibility analysis of the proposed installation alternatives as well as a proposal for amortization of the investment were shown in this work

Onde est@o os meus livros... ou a bibliotea nas nuvens?

At present, access to information is almost as valuable as information itself. Over the years, the role of libraries has usually been considered to include collection development, cataloging and access, and user services namely the loan of books, magazines and journals. However, this falls short in the contemporary context. That is why in addition to these functions, libraries are now information access facilitators, i.e. they make all kinds of knowledge and information easily available to users. Higher education library users may show different degrees of proficiency in the way they access both information and documents available at the libraries of their higher education institutions. This may often be related to the way libraries are able to fulfil their role of sharing information about existing library resources and their use. Bearing in mind this context, the topic of this conference presentation is our library and the different library resources available for use. This includes: the characteristics of library resources; how these library resources work, namely the abstract and citation database of peer-reviewed literature SCOPUS, which is the latest resource available from the library; the b-on platform (i.e. Online library of knowledge); Open-Access resources and tutorials available on the library webpage

Solving the Location Area Problem by Using Differential Evolution

In mobile networks, one of the hard tasks is to determine the best partitioning in the Location Area problem, but it is also an important strategy to try to reduce all the involved management costs. In this paper we present a new approach to solve the location management problem based on the Location Area partitioning, as a cost optimization problem. We use a Differential Evolution based algorithm to find the best configuration to the Location Areas in a mobile network. We try to find the best values for the Differential Evolution parameters as well as define the scheme that enables us to obtain better results, when compared to classical strategies and to other authors’ results. To obtain the best solution we develop four distinct experiments, each one applied to one Differential Evolution parameter. This is a new approach to this problem that has given us good results

Métodos rápidos para la identificación y confirmación de neisserias patógenas y especies relacionadas

Algunas especies de neisserias como Neisseria meningitidis y Neisseria gonorrhoeae son agentes infecciosos de gran importancia clínica, lo que obliga a un diagnóstico microbiológico correcto. Recientemente se ban descrito dos nuevas especies con características bioquímicas, morfológicas y de cultivo similares a las de aquéllas. Así, Neisseria cinérea, un comensal de las mucosas orofa- rigena y, en menor medida, genitourinaria que se ha asociado esporádicamente en patología humana en un caso de proctitis y otro de neumonía en un paciente con SIDA. La importancia radica en los errores de identificación que se producen con N. gonorrhoeae hasta el punto de haberse planteado problemas médico legales. Algo parecido ocurre con Neisseria polysaccha- rea, especie de reciente descripción, no incluida en la 9a. edición del Manual Bergey. Este microorganismo es un comensal de la orofaringe humana no asociado, por ahora, con patología. Es indistinguible de N. meningitidis por su patrón sacarolítico, características de cultivo, y porque comparte con el meningococo la localización faríngea, lo que ha ocasionado errores en la estimación del estado de portador.Facultad de Ciencias Veterinaria

Metaheuristic approaches for optimal broadcasting design in metropolitan MANETs

11th International Conference on Computer Aided Systems Theory. Las Palmas de Gran Canaria, Spain, February 12-16, 2007Mobile Ad-hoc Networks (MANETs) are composed of a set of communicating devices which are able to spontaneously interconnect without any pre-existing infrastructure. In such scenario, broadcasting becomes an operation of tremendous importance for the own existence and operation of the network. Optimizing a broadcasting strategy in MANETs is a multiobjective problem accounting for three goals: reaching as many stations as possible, minimizing the network utilization, and reducing the duration of the operation itself. This research, which has been developed within the OPLINK project (http://oplink.lcc.uma.es), faces a wide study about this problem in metropolitan MANETs with up to seven different advanced multiobjective metaheuristics. They all compute Pareto fronts of solutions which empower a human designer with the ability of choosing the preferred configuration for the network. The quality of these fronts is evaluated by using the hypervolume metric. The obtained results show that the SPEA2 algorithm is the most accurate metaheuristic for solving the broadcasting problem.Publicad

Nearby normal and luminous infrared galaxies with the SKA

The SKA will routinely provide µJy sensitivity and sub-arcsecond angular resolutions at radio wavelengths. Planned SKA surveys will image vast numbers of nearby galaxies, which are expected to provide a cornerstone in our understanding of star-formation and accretion activity in the local Universe. Here, we outline some of the key continuum and molecular line studies of local galaxies, where the SKA will have a significant scientific impact and where the Spanish astrophysical community is particularly active.MAPT, AA, and RHI acknowledge support from the Spanish Ministerio de Economía y Competitividad (MINECO) through grant AYA2012-38491-C02-02. S.G.B. acknowledges support from the Spanish MINECO through grants AYA2010-15169, AYA2012-32295, and program CONSOLIDER INGENIO 2010, under grant Molecular Astrophysics: The Herschel and ALMA EraASTROMOL (ref CSD2009-00038). S.G.B also acknowledges support from the Junta de Andalucia through TIC-114 and the Excellence Project P08-TIC-03531. A.A.H. and LC acknowledge support from the Spanish MINECO through grants AYA-2012-31447 and AYA-2012-32295. JHK acknowledges financial support to the DAGAL network from the People Programme (Marie Curie Actions) of the European Unions Seventh Framework Programme FP7/2007-2013/ under REA grant agreement number PITNGA-2011-289313, and from the Spanish MINECO under grant number AYA2013-41243-P.Peer Reviewe

The nuclear and extended infrared emission of the Seyfert galaxy NGC 2992 and the interacting system Arp 245

We present subarcsecond resolution infrared (IR) imaging and mid-IR spectroscopic observations of the Seyfert 1.9 galaxy NGC 2992, obtained with the Gemini North Telescope and the Gran Telescopio CANARIAS (GTC). The N-band image reveals faint extended emission out to ~3 kpc, and the PAH features detected in the GTC/CanariCam 7.5-13 micron spectrum indicate that the bulk of this extended emission is dust heated by star formation. We also report arcsecond resolution MIR and far-IR imaging of the interacting system Arp 245, taken with the Spitzer Space Telescope and the Herschel Space Observatory. Using these data, we obtain nuclear fluxes using different methods and find that we can only recover the nuclear fluxes obtained from the subarcsecond data at 20-25 micron, where the AGN emission dominates. We fitted the nuclear IR spectral energy distribution of NGC 2992, including the GTC/CanariCam nuclear spectrum (~50 pc), with clumpy torus models. We then used the best-fitting torus model to decompose the Spitzer/IRS 5-30 spectrum (~630 pc) in AGN and starburst components, using different starburst templates. We find that, whereas at shorter mid-IR wavelengths the starburst component dominates (64% at 6 micron), the AGN component reaches 90% at 20 micron. We finally obtained dust masses, temperatures and star formation rates for the different components of the Arp 245 system and find similar values for NGC 2992 and NGC 2993. These measurements are within those reported for other interacting systems in the first stages of the interaction.Comment: 20 pages, 12 figures, accepted by MNRA

Enseñanza de Arquitecturas de Memorias Caché mediante Simuladores

En este trabajo se presentan dos experiencias docentes en la enseñanza de arquitecturas de memoria caché para la titulación de Ingeniería Informática de la Universidad de Extremadura. Estas experiencias se desarrollan desde dos puntos de vista: Sistemas caché multinivel para una asignatura de carácter fundamental ("Estructura de Computadores"), y sistemas de memoria caché en multiprocesadores, para una asignatura de carácter avanzado ("Arquitectura de Computadores")

La asignatura AIC y su adaptación al EEES

La asignatura Arquitectura e Ingeniería de Computadores (AIC), impartida en la Universidad de Extremadura (UEx), pertenece al plan de estudios de la titulación de Ingeniería en Informática. Los autores presentan una propuesta de adaptación de dicha asignatura al Espacio Europeo de Educación Superior (EEES), con el ánimo de darla a conocer a otros profesores, y buscando siempre el intercambio de ideas y experiencias. En este artículo se detallan aspectos como las competencias que se pretenden fomentar con la asignatura AIC, la interrelación de AIC con otras asignaturas actuales en la titulación, los contenidos que se proponen para la asignatura teniendo en cuenta su adaptación al EEES, la dedicación que implicaría en créditos ECTS tanto para el alumno como para el profesor, las actividades e instrumentos de evaluación propuestos, etc