Recursos de colección

RiuNet. Repositorio institucional de la Universitat de Valencia (99.709 recursos)

RiuNet es el Repositorio Institucional de la Universitat Politècnica de València, gestionado por la Biblioteca, cuyo objetivo es ofrecer acceso en Internet a la producción científica, académica y corporativa de la comunidad universitaria con la finalidad de aumentar su visibilidad y hacerla accesible y preservable.

Mostrando recursos 1 - 20 de 21

  1. The regulation of aromatase and androgen receptor expression during gonad development in male and female European eel

    Peñaranda, D.S.; Mazzeo, Ilaria; Gallego Albiach, Victor; Hildahl, Jon; Nourizadeh-Lillabadi, Rasoul; Pérez Igualada, Luz María; Weltzien, Finn Arne; Asturiano Nemesio, Juan Francisco
    [EN] This research investigated the regulation of aromatase and androgen receptor gene expression in the brain–pituitary– gonad (BPG) axis of male and female European eels (Anguilla anguilla) during induced sexual maturation. Complete A. anguilla aromatase (aa-cyp19a1) and partial androgen receptor a and b (aa-ara and aa-arb) sequences were isolated, and qPCR assays were validated and used for quantification of transcript levels for these three genes. Expression levels of the genes varied with sex, tissue and stage of maturation. aa-arb was expressed at higher levels than aa-ara in the pituitary and gonad in both sexes, suggesting aa-arb is the physiologically most important androgen receptor in these tissues. In the female brain, a decrease...

  2. Guiding Classical Biological Control of an Invasive Mealybug Using Integrative Taxonomy

    Beltrà Ivars, Aleixandre; Addison, Pia; Ávalos Masó, Juan Antonio; Crochard, Didier; Garcia Marí, Ferran; Guerrieri, Emilio; Giliomee, Jan H.; Malausa, Thibaut; Navarro Campos, Cristina; Palero, Ferran; Soto Sánchez, Antonia Isabel
    The analysed sequences were deposited in Genbank under accession numbers KP771926-KP771972. Mealybug slides are available at the Polytechnic University of Valencia (Valencia, Spain). Parasitoid slides are deposited at Università degli Studi di Napoli Federico II (Portici, Italy).

  3. Determination of photostability, biocompatibility and efficiency as photo-Fenton auxiliaries of three different types of soluble bio-based substances (SBO)

    Gomis, Juan; Gonçalves, Mayara G.; Vercher Aznar, Rosa; Sabater Marco, Consuelo; Castillo López, Mª Ángeles; Prevot, Alessandra Bianco; Amat Payá, Ana María; Arqués Sanz, Antonio
    [EN] The aim of this work is to determine the photostability biocompatibility and efficiency of water soluble bio-based substances (SBO) in photo-oxidative processes for wastewater treatment. Three batches of SBO, isolated from different sources, have been investigated. Differences in the functional groups present in these substances can explain major trends in their physical/chemical properties. Bioassays have proven those materials to be non-toxic but to show poor biodegradability. Their ability to enhance a photo-Fenton process at milder pH (5.2) has been investigated using a mixture of emerging compounds in wastewaters. All the tested SBO were able to remove all pollutants in...

  4. Evaluación de la revisión de transcripciones y traducciones automáticas de vídeos poliMedia

    Valor Miró, Juan Daniel; Turró Ribalta, Carlos; Civera Saiz, Jorge; Juan Císcar, Alfonso
    [ES] Los vídeos docentes son una herramienta de gran aceptación en el mundo universitario, que se integran en metodologías activas y innovadoras, dando pie a plataformas como poliMedia, plataforma de la Universitat Politècnica de València (UPV) que permite la creación, publicación y difusión de este tipo de contenido multimedia. En el marco del proyecto europeo transLectures, la UPV ha generado automáticamente transcripciones y traducciones en español, catalán e inglés para todos los vídeos incluidos en el repositorio poliMedia. Las transcripciones y traducciones automáticas generadas tienen una alta calidad. Sin embargo, estas transcripciones y traducciones poseen errores inherentes al proceso automático de...

  5. Enabling HPC for QoS-sensitive applications: the MANGO approach

    Flich Cardo, José; Agosta, Giovanni; Ampletzer, Philipp; Atienza Alonso, David; Brandolese, Carlo; Cilardo, Alessandro; Fornaciari, William; Hoornenborg, Ynse; Kovac, Mario; Maitre, Bruno; Massari, Giuseppe; Mlinaric, Hrvoje; Papastefanakis, Ermis; Roudet, Fabrice; Tornero, Rafael; Zoni, Davide
    In this paper, we provide an overview of the MANGO project and its goal. The MANGO project aims at addressing power, performance and predictability (the PPP space) in future High-Performance Computing systems. It starts from the fundamental intuition that effective techniques for all three goals ultimately rely on customization to adapt the computing resources to reach the desired Quality of Service (QoS). From this starting point, MANGO will explore different but interrelated mechanisms at various architectural levels, as well as at the level of the system software. In particular, to explore a new positioning across the PPP space, MANGO will...

  6. Using automatic speech transcriptions in lecture recommendation systems

    Pérez González de Martos, Alejandro Manuel; Silvestre Cerdà, Joan Albert; Rihtar, M.; Juan Císcar, Alfonso; Civera Saiz, Jorge
    One problem created by the success of video lecture repositories is the difficulty faced by individual users when choosing the most suitable video for their learning needs from among the vast numbers available on a given site. Recommender systems have become extremely common in recent years and are used in many areas. In the particular case of video lectures, automatic speech transcriptions can be used to zoom in on user interests at a semantic level, thereby improving the quality of the recommendations made. In this paper, we describe a video lecture recommender system that uses automatic speech transcriptions, alongside other relevant text resources, to generate semantic lecture and user models....

  7. Simultaneous existence of phononic and photonic band gaps in periodic crystal slabs

    Pennec, Y.; Rouhani, B. Djafari; El Boudouti. E. H.; Li, C.; El Hassouani, Y.; Vasseur, J. O.; Papanikolaou, Nikos; BENCHABANE, SAMIR; LAUDE, VINCENT; Martínez Abietar, Alejandro José
    We discuss the simultaneous existence of phononic and photonic band gaps in a periodic array of holes drilled in a Si membrane. We investigate in detail both the centered square lattice and the boron nitride (BN) lattice with two atoms per unit cell which include the simple square, triangular and honeycomb lattices as particular cases. We show that complete phononic and photonic band gaps can be obtained from the honeycomb lattice as well as BN lattices close to honeycomb. Otherwise, all investigated structures present the possibility of a complete phononic gap together with a photonic band gap of a given...

  8. Broadband true time delay for microwave signal processing, using slow light based on stimulated Brillouin scattering in optical fibers

    Chin, Sanghoon; Thevenaz, Luc; Sancho Durá, Juan; Sales Maicas, Salvador; Capmany Francoy, José; Berger, Perrine; Bourderionnet, Jerome; Dolfi, Daniel
    We experimentally demonstrate a novel technique to process broadband microwave signals, using all-optically tunable true time delay in optical fibers. The configuration to achieve true time delay basically consists of two main stages: photonic RF phase shifter and slow light, based on stimulated Brillouin scattering in fibers. Dispersion properties of fibers are controlled, separately at optical carrier frequency and in the vicinity of microwave signal bandwidth. This way time delay induced within the signal bandwidth can be manipulated to correctly act as true time delay with a proper phase compensation introduced to the optical carrier. We completely analyzed the generated...

  9. Staphylococcus aureus nasal carriage could be a risk for development of clinical infections in rabbits

    Selva Martínez, Laura; Viana, David; Corpa Arenas, Juan Manuel
    [EN] Although nasal carriage has been described as a risk factor for Staphylococcus aureus infections in humans, there is a scarcity of studies about S. aureus nasal carriers in animals. In rabbits, S. aureus is one of the most important pathogens responsible for a number of different types of infections. This study was designed to determine the extent of staphylococcal nasal carriage and to establish whether a relationship exists between nasal carriage and development of lesions. One hundred and sixteen rabbits with and without chronic signs of staphylococcosis from 6 industrial rabbitries were monitored. Nasal swabs for microbiological assessments were obtained from all animals. Microbiological results...

  10. Effects of rearing feeding programme on the young rabbit females’ behaviour and welfare indicators

    Martinez Paredes, Eugenio Melchor; Ródenas Martínez, Luis; Pascual Amorós, Juan José; Blas Ferrer, Enrique; Brecchia, G.; Boiti, C.; Cervera Fras, Mª Concepción
    [EN] Restriction of young rabbit females during rearing is a widespread management technique that could have negative consequences on their welfare and behaviour. In the present work, a total of 24 young rabbit females aged 9 wk were used to evaluate 3 rearing feeding programmes until first parturition: CAL, fed ad libitum with a control diet [C: 11.0 MJ digestible energy (DE) and 114 g digestible protein (DP) per kg dry matter (DM)]; CR, receiving the C diet restricted (140 g/d) from 12 wk of age; and F, fed ad libitum with a low energy/high fibre diet [F: 8.7 MJ DE and 88 g DP...

  11. Ambient and fire behavior of eccentrically loaded elliptical slender concrete-filled tubular columns

    Espinós Capilla, Ana; Romero, Manuel L.; Portolés Flag, Jose Manuel; Hospitaler Pérez, Antonio
    This paper presents the results of an experimental program carried out on slender elliptical hollow section columns filled with concrete. Given the reduced number of experimental results found in the literature on concrete filled tubular columns with elliptical cross-section, the main objective of this paper is to compare the behavior of such innovative cross-sections under ambient and high temperatures. The test parameters covered in this experimental program were the load eccentricity (0, 20 and 50 mm) and the type of infill (plain concrete or bar-reinforced concrete). Six room temperature tests were performed, while other six tests were carried out at...

  12. Improving the Reproducibility of PAN s Shared Tasks

    Potthast, Martin; Gollub, Tim; Rangel, Francisco; Rosso, Paolo; Stamatatos, Efstathios; Stein, Benno
    This paper reports on the PAN 2014 evaluation lab which hosts three shared tasks on plagiarism detection, author identification, and author profiling. To improve the reproducibility of shared tasks in general, and PAN’s tasks in particular, the Webis group developed a new web service called TIRA, which facilitates software submissions. Unlike many other labs, PAN asks participants to submit running softwares instead of their run output. To deal with the organizational overhead involved in handling software submissions, the TIRA experimentation platform helps to significantly reduce the workload for both participants and organizers, whereas the submitted softwares are kept in a running state. This year, we addressed the matter of...

  13. Structured fibrous carbon-based catalyst for continuous nitrate removal from natural water

    Yuranova, T.; Franch Martí, Cristina; Palomares Gimeno, Antonio Eduardo; García-Bordejé, E.; Kiwi-Minsker, L.
    Bimetallic (Pd–Cu, Pd–Sn) nanoparticles supported on structured fibrous carbons (activated carbon fibers and carbon nanofibers grown on sintered metal fibers) were tested in nitrate removal of natural polluted water by hydrogen (a batch and continuous mode). Dependence of the activity/selectivity on catalyst chemical composition, promoter nature and metal particle size was studied. Sn-modified Pd nanoparticles showed higher N2 selectivity as compared to Cu-modified ones. The structured (Pd–Sn) nanoparticles supported on carbon nanofibers grown on Inconel sintered metal fibers demonstrated the best catalytic performance in an open flow reactor, providing optimal hydrodynamics properties.

  14. Intervention concepts for energy saving, recovery and generation from the urban water system

    Frijns, Jos; Monteiro, António; de Graaff, Marthe; Carriço, Nelson; Covas, Dídia; Cabrera Marcet, Enrique; Lausund, Erlend; Seip, Nils Darre; Saegrov, Sveinung; Hofman, Jan; Roest, Kees; Samora, Irene; Bolognesi, Andrea; Bragalli, Cristiana; Makropoulos, Christos; Baki, Sandra; Ramos, Helena; Salqueiro, Teresa
    There are numerous options for energy measures in the water sector ranging from water conservation and process efficiency improvements to new technologies and redesigning water systems. Next to energy efficiency improvements, there is a need for new concepts in which water is viewed as a carrier of energy. Municipal wastewater is a potential source of chemical energy, i.e. organic carbon that can be recovered as biogas in sludge digestion. Even more so, domestic (waste)water is a source of thermal energy. And in areas with altitude differences, installing micro-hydro technologies in water distribution systems can convert energy from the pressure and...

  15. Optimization of ODHE membrane reactor based on mixed ionic electronicconductor using soft computing techniques

    Lobera González, Maria Pilar; Valero Cubas, Soledad; Serra Alfaro, José Manuel; Escolástico Rozalén, Sonia; Argente Villaplana, Estefanía; Botti Navarro, Vicente Juan
    This work presents the optimization of the operating conditions of a membrane reactor for the oxidative dehydrogenation of ethane. The catalytic membrane reactor is based on a mixed ionic-electronic conducting material, i.e. Ba(0.5)Sr(0.5)Co(0.8)Fe(0.2)O(delta-3), which presents high oxygen flux above 750 degrees C under sufficient chemical potential gradient. Specifically, diluted ethane is fed into the reactor chamber and air (or diluted air) is flushed to the other side of the membrane. A framework based on Soft Computing techniques has been used to maximize the ethylene yield by simultaneously varying five operation variables: nominal reactor temperature (Temp); gas flow in the reaction...

  16. Plagiarism meets paraphrasing: insights for the next generation in automatic plagiarism detection

    Barrón Cedeño, Luis Alberto; Vila, Marta; Martí, M. Antònia; Rosso, Paolo
    Although paraphrasing is the linguistic mechanism underlying many plagiarism cases, little attention has been paid to its analysis in the framework of automatic plagiarism detection. Therefore, state-of-the-art plagiarism detectors find it difficult to detect cases of paraphrase plagiarism. In this article, we analyze the relationship between paraphrasing and plagiarism, paying special attention to which paraphrase phenomena underlie acts of plagiarism and which of them are detected by plagiarism detection systems. With this aim in mind, we created the P4P corpus, a new resource that uses a paraphrase typology to annotate a subset of the PAN-PC-10 corpus for automatic plagiarism detection....

  17. Radiopurity control in the NEXT-100 double beta decay experiment: procedures and initial measurements

    Alvarez, V.; Bandac, I.; Bettini, A.; Borges, F. I. G. M.; Carcel, S.; Castel, J.; Cebrian, S.; Cervera, A.; Conde, C. A. N.; Dafni, T.; Esteve Bosch, Raul; MARÍ ROMERO, ANTONIO FRANCISCO; Mora Mas, Francisco José; Palma, R.; Pérez Aparicio, José Luis; Toledo Alarcón, José Francisco
    The "Neutrino Experiment with a Xenon Time-Projection Chamber" (NEXT) is intended to investigate the neutrinoless double beta decay of Xe-136, which requires a severe suppression of potential backgrounds. An extensive screening and material selection process is underway for NEXT since the control of the radiopurity levels of the materials to be used in the experimental set-up is a must for rare event searches. First measurements based on Glow Discharge Mass Spectrometry and gamma-ray spectroscopy using ultra-low background germanium detectors at the Laboratorio Subterraneo de Canfranc (Spain) are described here. Activity results for natural radioactive chains and other common radionuclides are...

  18. 10 Gbit/s error-free DPSK modulation using a push-pull dual-drive silicon modulator

    AAMER, MARIAM; Thomson, D. J.; Gutiérrez Campo, Ana María; Brimont, Antoine Christian Jacques; Gardes, F. Y.; Reed, G. T.; Fedeli, J. M.; Håkansson, Ola Andreas; Sanchis Kilders, Pablo
    We experimentally demonstrate a high-speed differential phase shift keying (DPSK) modulation using a silicon push-pull operated dual-drive Mach Zehnder modulator (MZM) based on carrier depletion. 5 Gbit/s and 10 Gbit/s error-free modulation is demonstrated by demodulating the generated DPSK modulated signal using a demodulation circuit based on a polarization delay interferometer through the use of a differential group delay (DGD). Furthermore, the potential for higher DPSK modulation speeds up to 20 Gbit/s is also demonstrated. The obtained results validate the potential to achieve higher order modulation formats, such as quadrature phase shift keying (QPSK), by arranging the MZM in a...

  19. Development of an acoustic transceiver for the KM3NeT positioning system

    LAROSA, GIUSEPPINA; Ardid Ramírez, Miguel; Llorens Alvarez, Carlos David; Bou Cabo, Manuel; Martínez Mora, Juan Antonio; Adrián Martínez, Silvia; KM3NeT Consortium
    In this paper we describe an acoustic transceiver developed for the KM3NeT positioning system. The acoustic transceiver is composed of a commercial free flooded transducer, which works mainly in the 20-40 kHz frequency range and withstands high pressures (up to 500 bars). A sound emission board was developed that is adapted to the characteristics of the transducer and meets all requirements: low power consumption, high intensity of emission, low intrinsic noise, arbitrary signals for emission and the capacity of acquiring the receiving signals with very good timing precision. The results of the different tests made with the transceiver in the...

  20. Silicon Differential Receiver With Zero-Biased Balanced Detection for Access Networks

    AAMER, MARIAM; Sotiropoulos, Nikolaos; Brimont, Antoine Christian Jacques; Fedeli, Jean-Marc; Marris-Morini, Delphine; Cassan, Eric; Vivien, Laurent; Ribaud, Karen; Grosse, Philippe; Hartmann, Jean Michel; Vermeulen, Diedrik; Roelkens, Gunther; Sanchis Kilders, Pablo; Håkansson, Ola Andreas
    We present an optimized differential receiver in silicon with a minimized footprint and balanced zero-biased Ge photodiodes. The receiver integrates a delay-line with a 2 ¿ 4 multimode interferometer 90° hybrid and two balanced photodiodes for differential quadrature phase-shift keying demodulation. Two receivers are tested, for 10 and 20 Gb/s operation, and well opened eye-diagrams and symbol constellations are obtained with error vector magnitude values as low as 12.5% and 19.57%, respectively. The results confirm the potential of integrated silicon receivers to become key building blocks for future passive optical access networks based on advanced modulation formats. © 1989-2012 IEEE.

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