576 research outputs found

    Using Fuzzy Logic Algorithms and Growing Hierarchical Self-Organizing Maps to Define Efficient Security Inspection Strategies in a Container Terminal

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    Maritime transport is one of the oldest methods of moving various types of goods, and it continues to have an important role in our modern society. More than 20 million containers are transported across the oceans daily. However, this form of transportation is constantly threatened by illegal operations, such as the smuggling of goods or people and merchandise theft. Port security departments must be prepared to face the different threats and challenges that accompany the use of innovative techniques and devices to achieve efficient inspection strategies. Two inspection strategies are presented in this study. The first strategy is based on fuzzy logic (FL), and the second strategy is based on the growing hierarchical self-organizing map (GHSOM) approach. The weight variation and security index (SI) of a container and the readings from certain technologies, such as radio-frequency identification (RFID) and X-ray scanning, are considered as the input data. To minimize the inspection time and considering the costs associated with the security inspections of containers, the results of both inspection strategies are compared and analyzed. The findings indicate there is potential for improving the effectiveness of security inspections by employing both techniques, and the specific relevance in the case of GHSOMs is discussed.Programa Estatal de Investigación, Desarrollo e Innovación Orientada a los Retos de la Sociedad - “Estrategias de diseño microelectronico para IOT en escenarios hostiles” TEC2016-80396-C2-2-

    Does family matter? A study of parents’ influence on the entrepreneurial intention of technical degrees students in Spain

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    The purpose of this study is to verify the parental influence on the entrepreneurial intention of technical degrees students in Spain. In an economic crisis context such as the one Spain is currently suffering, entrepreneurship is often regarded as an opportunity for productivity increase and wealth generation, especially if it is technology-based. Therefore, the research of factors that may determine young engineers’ attitude towards entrepreneurship is of great interest. Special attention is paid to parents’ role as knowledge transferors, as their experience may have a positive effect on the entrepreneurial intention of their children

    TCP-Based distributed offloading architecture for the future of untethered immersive experiences in wireless networks

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    IMX '22: ACM International Conference on Interactive Media Experiences, 22-24 June 2022, Aveiro, Portugal.Task offloading has become a key term in the field of immersive media technologies: it can enable lighter and cheaper devices while providing them higher remote computational capabilities. In this paper we present our TCP-based offloading architecture. The architecture, has been specifically designed for immersive media offloading tasks with a particular care in reducing any processing overhead which can degrade the network performance. We tested the architecture for different offloading scenarios and conditions on two different wireless networks: WiFi and 5G millimeter wave technologies. Besides, to test the network on alternative millimeter wave configurations, currently not available on the actual 5G millimeter rollouts, we used a 5G Radio Access Network (RAN) real-time emulator. This emulator was also used to test the offloading architecture for an simulated immersive user sharing network resources with other users. We provide insights of the importance of user prioritization techniques for successful immersive media offloading. The results show a great performance for the tested immersive media scenarios, highlighting the relevance of millimeter wave technology for the future of immersive media applications.This work has received funding from the European Union (EU) Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie ETN TeamUp5G, grant agreement No. 813391

    A influência de diferentes metodologias de ensino-aprendizagem-treinamento no basquetebol sobre o nível de conhecimento tático processual

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    O objetivo do presente estudo foi observar e descrever o processo de ensino-aprendizagem-treinamento (E-A-T) técnico-tático aplicado no basquetebol na categoria mini-basquete (10-12 anos) e analisar sua influência no nível de rendimento do conhecimento tático processual (CTP). A amostra deste estudo foi constituída por 40 praticantes, do sexo masculino, da modalidade esportiva basquetebol, pertencentes a três grupos (A, B e C) de práticas diferentes. Para determinar a metodologia utilizada, as sessões de treinamento foram filmadas e categorizadas conforme o protocolo de Stefanello (1999). Os parâmetros táticos oferecer-se e orientar-se (OO) e reconhecer espaços (RE) foram analisados e avaliados conforme a manifestação do pensamento convergente (inteligência de jogo). Confirmou-se que no grupo "A" foi utilizado um processo de E-A-T com ênfase no método situacional-global (SG). Já no grupo "B" predominou a utilização do método situacional e do método misto (SM). No grupo "C" houve uma ênfase na utilização do método analítico (MA). No nível de rendimento do CTP, confirmou-se que o método SG oportunizou uma melhoria dos parâmetros OO convergente (p = 0,000) e RE convergente (p = 0,000). Pode-se dizer que o método SG contribuiu positivamente para o desenvolvimento da inteligência tática dos participantes deste estudo.The objective of the present study was to observe and to describe the technical-tactical teaching-learning-training process (T-L-T) applied in basketball from 10 to 12 years old) and to analyze its influence in the level of income of the procedural tactical knowledge (PTK). The sample of this study was constituted of 40 male basketball players pertaining to three different practice groups (A, B and C). In order to determine the used methodology, the training sessions were filmed and categorized in agreement to Stefanello's (1999) protocol. The tactical parameters to offer themselves and to orient themselves (OO) and to recognize spaces (RS) were analyzed and evaluated as the manifestation of the convergent thought (game intelligence). It was confirmed that a process of T-L-T with emphasis in the situational-global (SG) method was used in the group "A". The use of situational and mixing (SM) method prevailed in the group "B". In the group "C", it was observed an emphasis in the use of the analytical method (AM). In the level of income of the CTP, it was confirmed that SG method propitiated an improvement of convergent OO (p = 0.000) and convergent RS (p = 0.000) parameters. It is possible to infer that SG method positively contributed to the development of the tactical intelligence of the participants of this study

    Olive grove intensification negatively affects wintering bird communities in central Spain

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    Agricultural intensification is a persistent and growing threat to biodiversity worldwide. Olive groves cover extensive areas in the Mediterranean basin and play a fundamental role as refuge and wintering quarters for many bird species, but the effects of their current intensification on bird communities remain unclear. This study aims to evaluate the response of wintering birds to the management of olive groves with different degrees of intensification (traditional, intensive and super-intensive management) in central Spain. Based on two bird censuses conducted in 25 groves in early and late winter, we examined the influence of habitat structure and composition at different spatial scales on species richness and abundance of the entire farmland bird community, and of the diet-based functional groups. Total species richness tended to decrease with intensive olive grove management, probably due to reduced habitat heterogeneity, whereas total abundance did not, indicating the capacity of intensive and super-intensive olive groves to sustain large numbers of wintering birds. The negative effect of intensification was particularly evident in frugivore species richness, while frugivore abundance was positively (but marginally) associated with olive fruit availability. Granivorous species were positively associated with lower vegetation cover, but insectivorous species did not respond to intensification gradients. Species richness and abundance (total and by diet-based functional groups) also decreased from early to late winter, which may be due to the effect of olive harvest, but also to an extreme cold event. Overall, our findings show how olive grove intensification and the associated management practices result in significant changes in habitat structure and composition at different spatial scales, thus affecting wintering bird communitiesWe thank the Faculty of Sciences from Universidad Autónoma de Madrid for their financial support through their TFM support line. D.L. acknowledges a postdoctoral grant provided by the Comunidad de Madrid (2020-T1/ AMB-20636, Atraccion de Talento Investigador, Spain). This paper is a contribution to REMEDINAL-TE project (P2018/EMT-4338; Madrid Regional Government and EU Social Fund

    Las emociones, la genética y la neurociencia en la atención educativa a la diversidad

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    The following monograph aims to determine the relationship between genetics, neuroscience and emotions and their importance in educational attention to diversity. Only a few decades ago the scientific community has not begun to take seriously the importance of emotions in the processes of reason, and their repercussions, in all areas of human life. In this sense, the question consists not only in informing about the need to know how emotions work in the body-mind unit of the human organism and in the interaction with the environment, but also in assuming educational responsibility in this regard. There is no mental function without a brain and a social context, so emotions are the product of the organism encoded by its genome in adaptation to social experience. La siguiente monografía tiene como objetivo determinar la relación que existe entre la genética, la neurociencia y las emociones y su importancia en la atención educativa a la diversidad. Hace tan sólo unas décadas la comunidad científica no ha comenzado a tomar en serio la importancia de las emociones en los procesos de la razón, y sus repercusiones, en todos los ámbitos de la vida humana. En este sentido, la cuestión consiste no sólo en informar sobre la necesidad de conocer cómo funcionan las emociones en la unidad cuerpo-mente del organismo humano y en la interacción con el entorno, sino también en asumir la responsabilidad educativa al respecto. No hay función mental sin un cerebro y un contexto social, por lo que las emociones son producto del organismo codificado por su genoma en adaptación a la experiencia social

    Main viruses in sweet cherry plantations of Central-Western Spain

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    Sweet cherry trees (Prunus avium L.) are susceptible to a range of diseases, but there have been no studies to date about the viral infection of sweet cherry trees in Spain. To determine the phytosanitary status of Spanish sweet cherry plantations, the incidence and leaf symptoms induced by Prune dwarf (PDV), Prunus necrotic ringspot (PNRSV) and Apple chlorotic leaf spot (ACLSV) viruses were investigated during 2009. Young leaf samples were taken from 350 sweet cherry trees, corresponding to 17 cultivars, and were analysed by double antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA). To associate the leaf symptoms with the virus, 50 mature leaves from each infected tree were visually inspected during the summer. The ELISA results revealed that 72 % of sweet cherry trees were infected by at least one of the viruses. PDV occurred in all sampled cultivars and presented the highest infection rate, followed by ACLSV and PNRSV. A high number of trees showed asymptomatic, in both single and mixed infections. The leaf symptoms associated with the viruses involved generalized chlorosis around the midvein (PDV), chlorotic and dark brown necrotic ringspots on both secondary veins and intervein regions (PNRSV), chlorotic and reddish necrotic ringspots (ACLSV) and generalized interveinal chlorosis (PDV-PNRSV)

    Arrested dynamics of the dipolar hard-sphere model

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    We report the combined results of molecular dynamics simulations and theoretical calculations concerning various dynamical arrest transitions in a model system representing a dipolar fluid, namely, N (softcore) rigid spheres interacting through a truncated dipole-dipole potential. By exploring different regimes of concentration and temperature, we find three distinct scenarios for the slowing down of the dynamics of the translational and orientational degrees of freedom: At low ({η\eta} = 0.2) and intermediate (η{\eta} = 0.4) volume fractions, both dynamics are strongly coupled and become simultaneously arrested upon cooling. At high concentrations ({η\eta} <\lt 0.6), the translational dynamics shows the features of an ordinary glass transition, either by compressing or cooling down the system, but with the orientations remaining ergodic, thus indicating the existence of partially arrested states. In this density regime, but at lower temperatures, the relaxation of the orientational dynamics also freezes. The physical scenario provided by the simulations is discussed and compared against results obtained with the self-consistent generalized Langevin equation theory, and both provide a consistent description of the dynamical arrest transitions in the system. Our results are summarized in an arrested states diagram which qualitatively organizes the simulation data and provides a generic picture of the glass transitions of a dipolar fluid

    El sevillano “capitán” Marcos de Cabrera: personaje enigmático, notable escultor. Revisión histórico-artística y técnica

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    Sculptor Marcos de Cabrera is a Sevillian artist from the 17th century whose shortage of works and news referring to it, turn complicated the study about him. This has motivated the development of hypothesis, many of them erroneous, leading to confusions. This study is a critical review that tries to establish links among as many data as possible, providing at the same time a series of reflections upon the biographical ground and the artistic and technical one, as well.El escultor Marcos de Cabrera es un artista sevillano del siglo XVI de estudio complicado debido a la escasez de obras y noticias que lo refieran. Ello ha motivado la elaboración de hipótesis, muchas de ellas erróneas, llevándonos a desconciertos. Este estudio es una “revisión crítica” que intenta relacionar los mayores datos posibles, proporcionando a su vez una serie de reflexiones tanto en el plano biográfico como histórico y artístico-técnico
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