603 research outputs found

    3x3 Multibeam Network for a Triangular Array of Three Radiating Elements

    Get PDF
    A multibeam antenna study based on Butler network will be undertaken in this document. These antenna designs combines phase shift systems with multibeam networks to optimize multiple channel systems. The system will work at 1.7 GHz with circular polarization. Specifically, result simulations and measurements of 3 element triangular subarray will be shown. A 45 element triangular array will be formed by the subarrays. Using triangular subarrays, side lobes and crossing points are reduced

    Fast Algorithm for Impact Point Selection in Semiparametric Functional Models

    Get PDF
    [Abstract] A new sparse semiparametric functional model is proposed, which tries to incorporate the influence of two functional variables in a scalar response in a quite simple and interpretable way. One of the functional variables is included trough a single-index structure and the other one linearly, but trough the high-dimensional vector of its discretized observations. For this model, a new algorithm for impact point selection in the linear part and for the model estimation is proposed. This procedure is based on the functional origin of the linear covariates. Some asymptotic results will ensure the good performance of the method. The computational efficiency of the algorithm, without loss of predictive power, will be showed trough a simulation study and a real data application, by comparing its results with those obtained trough the standard PLS method.Ministerio de Economía y Competitividad; MTM2014-52876-RMinisterio de Economía y Competitividad; MTM2017-82724-RXunta de Galicia; ED431G/01 2016-2019Xunta de Galicia; ED431C2016-015Xunta de Galicia; ED481A-2018/19

    Stimulating Creative Entrepreneurial Initiatives: A flow diagram for strategic planning

    Get PDF
    [Abstract]: This paper contributes to the organizational study of the creativity applied to business innovation through the analysis of three propositions: (1) there are substantial differences between Creative Entrepreneurial Initiatives (CEIs) and non-CEIs, regarding to human capital factors, structural capital factors, intellectual property and creative value chain; (2) there are institutional, financial and educational barriers that limits the creation of CEIs in South Europe (Portugal, France, Spain), and (3) the adaptation of organizational measures of stimulus to the specificity of CEIs through a flow diagram can reduce the limiting effect of the barriers detected by CEIs. From this approach, researchers and policy makers can obtain a better understanding of the specificities of the CIEs from a sectoral, strategic and organizational focus

    The role of MEN (mitosis exit network) proteins in the cytokinesis of Saccharomyces cerevisiae

    Get PDF
    At the latest stages of their cell cycle, cells carry out crucial processes for the correct segregation of their genetic and cytoplasmic material. In this work, we provide evidence demonstrating that the cell cycle arrest of some MEN (mitosis exit network) mutants in the anaphase-telophase transition is bypassed. In addition, the ability of cdc15 diploid mutant strains to develop non-septated chains of cells, supported by nuclear division, is shown. This phenotype is also displayed by haploid cdc15 mutant strains when cell lysis is prevented by osmotic protection, and shared by other MEN mutants. By contrast, anaphase-telophase arrest is strictly observed in double MEN-FEAR (fourteen early anaphase release) mutants. In this context, the overexpression of a FEAR component, SPO12, in a MEN mutant background enhances the ability of MEN mutants to bypass cell cycle arrest. Taken together, these data suggest a critical role of Cdc15 and other MEN proteins in cytokinesis, allowing a new model for their cellular function to be proposed. [Int Microbiol 2005; 8(1):33-42

    Smart cities for wellbeing: youth employment and their skills on computers

    Get PDF
    [Abstract]: The smart cities can be understood as an inclusive space for each and everyone to achieve their best options, within the framework of sustainable development, where institutions boost information and technology environments which help to achieve the highest individual and social well-being with the aim of improving the lives of citizens. The youth group (between 15 and 24 years) was sternly affected for the crisis. In this paper the youth employability, in relation to the new challenges of smart cities, is analyzed in the EU, with the aim of assessing the influence of ICTs skills on youth employability. By means of a mean analysis and a Structural Equation Modelling the differences between the Euro Area and the other countries in the EU is analyzed, as well as the importance of information technologies and the computers skills for increasing youth employability. The results indicate that awareness of the importance of IT skills is greater in the euro area and that computer skills and highly significant to explain the employability of young people. The achieved conclusions point out to the training on computers skills as a key factor for boosting youth employment. This paper contribution could help to increase social wellbeing by means of giving support to policy makers to make decisions to increase youth employment and to provide the qualified workforce to those companies arose among the smart cities. The main original value is to link the computer skills to the employment for the specific youth group in the EU

    La violencia de los hijos hacia los padres y de los padres hacia los hijos: una revisión metaanalítica

    Get PDF
    In order to examine the literature on the relationship between child-to-parent violence and parent-to-child violence, a meta-analytic review was designed with 26 effect sizes assessing the relationship between child-to-parent and parentto-child violence in 19 primary studies. Correlational effect sizes were computed and corrected for sampling error, and predictor and criterion unreliability. The results showed a significantly positive, medium magnitude (ρ = .36) mean true effect size for the relationship between child-to-parent violence and parent-to-child violence. Similar results were found for direct and vicarious victimization. The probability of developing child-to-parent violence for children victimized by parents increased 71% as compared to non-victimized children. The child-to parent violence type (physical or psychological), and the population (judicial or community) were analysed as moderators. The results revealed similar effects in both types of child-to-parent violence and in both populations: a significantly positive, medium in magnitude mean true effect size. The theoretical and practical implications for measuring child-to parent violence are discussed.Con el propósito de examinar la literatura sobre la relación entre la violencia de hijos a padres y la violencia de padres a hijos, se diseñó una revisión metaanalítica con 26 tamaños del efecto que evalúan la relación de la violencia entre hijos y padres y padres e hijos en 19 estudios principales. Se calcularon y corrigieron los tamaños del efecto correlacional para el error de muestreo y la predicción y la fiabilidad del criterio. Los resultados mostraron una magnitud media significativamente positiva (ρ = .36), que significa el tamaño verdadero del efecto para la relación entre la violencia de hijos a padres y la violencia de padres a hijos. Se encontraron resultados similares para la victimización directa e indirecta. La probabilidad de desarrollar violencia de hijos a padres para los niños victimizados por los padres aumentó 71% en comparación con los niños no victimizados. El tipo de violencia del niño hacia el padre (física o psicológica) y la población (judicial o comunitaria) se analizaron como moderadores. Los resultados revelaron efectos similares en ambos tipos de violencia entre padres e hijos en ambas poblaciones: un nivel de efecto medio significativamente positivo, de magnitud media. Se discuten las implicaciones teóricas y prácticas para medir la violencia de los hijos hacia sus padres.Financiado polo Ministerio de Economía, Industria e Competitividade de España (PSI2017-87278-R).S

    Host-Guest Complexation Studied by Fluorescence Correlation Spectroscopy: Adamantane–Cyclodextrin Inclusion

    Get PDF
    The host-guest complexation between an Alexa 488 labelled adamantane derivative and β-cyclodextrin is studied by Fluorescence Correlation Spectroscopy (FCS). A 1:1 complex stoichiometry and a high association equilibrium constant of K = 5.2 × 104 M−1 are obtained in aqueous solution at 25 °C and pH = 6. The necessary experimental conditions are discussed. FCS proves to be an excellent method for the determination of stoichiometry and association equilibrium constant of this type of complexes, where both host and guest are nonfluorescent and which are therefore not easily amenable to standard fluorescence spectroscopic methods

    Mito y violencia en Oldboy

    Get PDF
    The present study proposes an approach to the film Oldboy (올드보이) (Park Chan Wook, 2003). The resemantization of the myth in the film, the cultural landscapes that contaminate the discourse of the film, and the violence as an expression of this resemantization of the myth and the mythopoetic attitudes of the characters involved in the plot are analyzed. Several theoretical models were taken into consideration to analyze the work under study, although, fundamentally, the proposal developed by Zavala to study violence in cinematographic language was followed. Finally, it is concluded that the film is a proposal in which violence is surreal, excessive and tragicomic. It is another piece in which Park Chan Wook intends to show revenge and violence as a futile, destructive and senseless act. The object of desire lost is irreparable through violence, there is no redemption for those who execute it, only the invocation of an irremediable loss of themselves by consummating their acts of blood.El presente estudio propone un acercamiento a la película Oldboy (올드보이) (Park Chan Wook, 2003). Se analiza la resemantización del mito en la película, los paisajes culturales que contaminan el discurso del filme y la violencia como una expresión de esa resemantización del mito y de las actitudes mitopoiética de los personajes que intervienen en la trama. Se tomaron en consideración varios modelos teóricos para analizar la obra objeto de estudio, aunque, en lo fundamental, se siguió la propuesta desarrollada por Zavala para estudiar la violencia en el lenguaje cinematográfico. Finalmente, se concluye que el filme supone una propuesta en la que la violencia es surrealista, desmedida y tragicómica. Es otra de las piezas en la que Park Chan Wook pretende mostrar la venganza y la violencia como acto fútil, destructivo y carente de sentido. El objeto de deseo perdido es irreparable por medio de la violencia, no hay redención para quienes la ejecutan, solo la invocación de una irremediable pérdida de sí mismos al consumar sus actos de sangre

    Forestry applications of ground-penetrating radar

    Get PDF
    Ground-penetrating radar (GPR) is a geophysical and close-range remote sensing technique based on the use of radar pulses to obtain cross-section images of underground features. This method is characterized by the transmission of an electromagnetic short length pulse (1-2 ns), presenting a centre frequency ranging from 10 MHz to 2.5 GHz. The principles of GPR operation are based on the ability of low frequency radar waves to penetrate into a non-conductive medium, usually subsoil, but also walls, concrete or wood. Those waves are detected after suffering a reflection in electromagnetic discontinuities of the propagation medium. Therefore, this is a suitable method to study changes in those physical properties, and also to characterize different mediums and the reflective targets providing information about their physical properties. The aim of this work is to describe and demonstrate different applications of GPR in forestry, showing the obtained results together with their interpretation. Firstly, in this paper, it is illustrated how GPR is able to map shallow bedrock, subsoil stratigraphy and also to estimate shallow watertable depth. Secondly, different tree trunks as well as dry timber are analyzed, evaluating the different radar data obtained in each particular case, and observing differences in their electromagnetic properties related to the GPR response. Finally, several measurements were taken in order to analyze the use of GPR to detect tree root systems using polarimetric techniques, being possible to detect medium and big size roots, together with groups of small roots. Key words: GPR, remote sensing, bedrock, watertable, trunk, root system.Postprint (published version
    corecore