1,887 research outputs found

    Combining VIVO and Google Scholar data as sources for CERIF linked data: a case in the agricultural domain

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    The needs of global science have fostered open access to the results and contextual information of research organizations at an international scale. This requires the use of standards or shared data models to exchange information preserving its semantics when transferred between systems. In that direction, standards as CERIF or projects as VIVO were developed to exchange or expose the scientific knowledge. Also, there are other sources of scientific information in the Web that are useful to complement institutional repositories and CRISes. The heterogeneity of data models behind each source in turn raises the need for mappings between them to ease interchange and aggregate information. In this paper, we present a tool that integrates three sources of research information and enables their aggregating and export into both VIVO and CERIF models. We present a case study in agriculture using OpenAGRIS, a bibliographic database linked to Web sources with more than 7 million records. Concretely, we describe the methods to combine Google Scholar data for the scholarly content indexed in OpenAGRIS and aggregating new information provided by the first one, using our tool. Finally the information is stored in a VIVO instance and then translated into CERIF using a conversion process mapping both data models. The case demonstrates the possibilities of mapping tools to aggregate and translate CRIS information

    Confinement Effects on the Crystalline Features of Poly(9,9-dioctylfluorene)

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    Typical device architectures in polymer-based optoelectronic devices, such as field effect transistors organic light emitting diodes and photovoltaic cells include sub-100 nm semiconducting polymer thin-film active layers, whose microstructure is likely to be subject to finite-size effects. The aim of this study was to investigate effect of the two-dimensional spatial confinement on the internal structure of the semiconducting polymer poly(9,9-dioctylfluorene) (PFO). PFO melts were confined inside the cylindrical nanopores of anodic aluminium oxide (AAO) templates and crystallized via two crystallization strategies, namely, in the presence or in the absence of a surface bulk reservoir located at the template surface. We show that highly textured semiconducting nanowires with tuneable crystal orientation can be thus produced. Moreover, our results indicate that employing the appropriate crystallization conditions extended-chain crystals can be formed in confinement. The results presented here demonstrate the simple fabrication and crystal engineering of ordered arrays of PFO nanowires; a system with potential applications in devices where anisotropic optical properties are required, such as polarized electroluminescence, waveguiding, optical switching, lasing, etc

    Epidemiología de las fracturas de la extremidad distal del radio en el área de salud de Badajoz

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    Estudiamos la epidemiología de las fracturas de la extremidad distal del radio en el área de salud de Badajoz atendidos en urgencias del Hospital Universitario Infanta Cristina que cubre una población de 237.732 habitantes mayores de 15 años, entre Noviembre de 2003 a Octubre de 2004. Se recogieron los datos de edad, sexo, lateralidad, antecedentes personales, lugar donde ocurrió la fractura, mecanismo de producción. El número total fue de 379, de las que 250 (66%) se produjeron en mujeres. La incidencia en hombres fue de 12,5 por 10000 y en la mujeres de 23,5 por 10.000. La edad media fue de 57 años. El lado más afectado fue el izquierdo con 210 (55,6%), 169 (43%) el derecho y 6 (1,3%) bilaterales. Las enfermedades concomitantes más frecuentes fueron la hipertensión arterial, la enfermedad neurológica y la diabetes. Un 12,9% de los pacientes seguía o tenía algún tipo de tratamiento contra la osteoporosis. La caída casual o deportiva fueron las causas más frecuentes. Hubo una mayor incidencia en los meses de verano.The epidemiology of distal radius fracture has being studied in Badajoz and its sanitary area during November 2003 to October 2004. The population over 15 years old of this area was 237.732. Age, sex, side, comorbility, mechanism of production were studied. Total number was 379, of which 260 (66%) were in women. The annual incidence was 23.5 per 10000 in women and 12.5 in men per 10.000 inhabitant. The median age was 57. The left side was affected in 210 cases and the right in 169, and bilateral in 6. Arterial hypertension, neurological diseases and diabetes were the most frequent associated diseases. Some form of osteoporosis treatment was taken by 12. 9% . Casual and sport falls were the most frequent mechanism. Most of fractures occur during summer

    Development of a novel equine influenza virus live-attenuated vaccine

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    H3N8 equine influenza virus (EIV) is an important and significant respiratory pathogen of horses. EIV is enzootic in Europe and North America, mainly due to the suboptimal efficacy of current vaccines. We describe, for the first time, the generation of a temperature sensitive (ts) H3N8 EIV live-attenuated influenza vaccine (LAIV) using reverse-genetics approaches. Our EIV LAIV was attenuated (att) in vivo and able to induce, upon a single intranasal administration, protection against H3N8 EIV wild-type (WT) challenge in both a mouse model and the natural host, the horse. Notably, since our EIV LAIV was generated using reverse genetics, the vaccine can be easily updated against drifting or emerging strains of EIV using the safety backbone of our EIV LAIV as master donor virus (MDV). These results demonstrate the feasibility of implementing a novel EIV LAIV approach for the prevention and control of currently circulating H3N8 EIVs in horse populations

    Improving the graphical lasso estimation for the precision matrix through roots ot the sample convariance matrix

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    In this paper, we focus on the estimation of a high-dimensional precision matrix. We propose a simple improvement of the graphical lasso framework (glasso) that is able to attain better statistical performance without sacrificing too much the computational cost. The proposed improvement is based on computing a root of the covariance matrix to reduce the spread of the associated eigenvalues, and maintains the original convergence rate. Through extensive numerical results, using both simulated and real datasets, we show the proposed modification outperforms the glasso procedure. Finally, our results show that the square-root improvement may be a reasonable choice in practiceAlonso gratefully acknowledge financial support from the Spanish Ministry of Science and Innovation grants ECO2011-25706 and ECO2012-3844

    D-trace Precision Matrix Estimation Using Adaptive Lasso Penalties

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    An accurate estimation of a precision matrix has a crucial role in the current age of high-dimensional data explosion. To deal with this problem, one of the prominent and commonly used techniques is the l1 norm (Lasso) penalization for a given loss function. This approach guarantees the sparsity of the precision matrix estimator for properly selected penalty parameters. However, the l1 norm penalization often fails to control the bias of the obtained estimator because of its overestimation behavior. In this paper, we introduce two adaptive extensions of the recently proposed l1 norm penalized D-trace loss minimization method. The proposed approaches intend to diminish the produced bias in the estimator. Extensive numerical results, using both simulated and real datasets, show the advantage of our proposed estimators

    Caenibacterium thermophilum gen. nov., sp. nov., isolated from a thermophilic aerobic digester of municipal sludge

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    A bacterial strain, N2-680T (=DSM 15264T=LMG 21760T), isolated from a thermophilic aerobic digester of municipal sludge, was characterized with respect to its morphology, physiology and taxonomy. Phenotypically, the isolate was a Gram-negative rod with a polar flagellum, catalase- and oxidase-positive, containing cytoplasmic inclusions of poly-b-hydroxybutyrate and had an optimal growth temperature of about 47 6C. Strain N2-680T was unable to reduce nitrate and could use organic acids, amino acids and carbohydrates as single carbon sources. Chemotaxonomic analysis revealed that ubiquinone 8 was the major respiratory quinone of this organism and that phosphatidylethanolamine and phosphatidylglycerol were the major polar lipids. At 50 6C, the major components in fatty acid methyl ester analysis were C16 : 0 and cyclo-C17 : 0. The highest 16S rDNA sequence identity of isolate N2-680T was to Leptothrix mobilis and Ideonella dechloratans (95?7%) and to Rubrivivax gelatinosus and Aquabacterium commune (95?6 %). 16S rDNA sequence similarities to species of two related thermophilic genera, Caldimonas manganoxidans and Tepidimonas ignava, were lower (93?6 and 94?7 %). On the basis of phylogenetic analyses and physiological and chemotaxonomic characteristics, it is proposed that isolate N2-680T represents a new genus and species, for which the name Caenibacterium thermophilum gen. nov., sp. nov. is propose

    Tepidiphilus margaritifer gen. nov., sp. nov., isolated from a thermophilic aerobic digester

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    A moderately thermophilic bacterium is described, strain N2-214T, that was isolated from an enrichment culture, growing on caprolactone, obtained from a sample from a water-treatment sludge aerobic digester operating at temperatures around 60 °C. The organism was aerobic, Gram-negative, oxidase- and catalase-positive, with a polar flagellum, and capable of growth at temperatures as high as 61 °C. The major fatty acids of strain N2-214T were C16 : 0, C18 : 1 and cyclo-C19 : 0. The phylogenetic relationships of the strain, derived from 16S rRNA gene sequence comparisons, demonstrated it to be a member of the {beta}-subclass of the Proteobacteria. The highest 16S rDNA sequence similarity of isolate N2-214T was to Azoarcus buckelii (91·9 %), Thauera aromatica (92 %) and Hydrogenophilus thermoluteolus (92·7 %). On the basis of phylogenetic analyses and physiological and chemotaxonomic characteristics, it is proposed that isolate N2-214T (=DSM 15129T=LMG 21637T) represents a new genus and species, Tepidiphilus margaritifer gen. nov., sp. nov
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