1,136 research outputs found

    Multi-granular, multi-purpose and multi-Gb/s monitoring on off-the-shelf systems

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    This is the accepted version of the following article: [Moreno, V., Santiago del Río, P. M., Ramos, J., Muelas, D., García-Dorado, J. L., Gomez-Arribas, F. J. and Aracil, J. (2014), Multi-granular, multi-purpose and multi-Gb/s monitoring on off-the-shelf systems. Int. J. Network Mgmt., 24: 221–234. doi: 10.1002/nem.1861, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/nem.1861/abstractAs an attempt to make network managers’ life easier, we present M3Omon, a system architecture that helps to develop monitoring applications and perform network diagnosis. M3Omon behaves as an intermediate layer between the traffic and monitoring applications that provides advanced features, high performance and low cost. Such advanced features leverage a multi-granular and multi-purpose approach to the monitoring problem. Multi-granular monitoring gives answer to tasks that use traffic aggregates to identify an event, and requires either flow records or packet data or even both to understand it and, eventually, take the convenient countermeasures. M3Omon provides a simple API to access traffic simultaneously at several different granularities—i.e., packet-level, flow-level and aggregate statistics. The multi-purposed design of M3Omon allows not only performing tasks in parallel that are specifically targeted to different traffic-related purposes (e.g., traffic classification and intrusion detection) but also sharing granularities between applications—e.g., several concurrent applications fed from flow records that are provided by M3Omon. Finally, the low-cost characteristic is brought by off-the-shelf systems (the combination of open-source software and commodity hardware) and the high performance is achieved thanks to modifications in the standard NIC driver, low-level hardware interaction, efficient memory management and programming optimization

    Funeral rites and socio-religious projection of the Chapter of Priests and Incumbents of Toledo (1436-1488)

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    El presente artículo tiene por objeto principal el estudio de los ritos funerarios solicitados por las élites toledanas al Cabido de Curas y Beneficiados, entre 1436 y 1488. En concreto, este trabajo se centra en el papel que jugaron las mandas fúnebres en la construcción de la memo-ria y escenificación del poder de las oligarquías urbanas, durante la Baja Edad Media. Mediante el estudio de siete obituarios, pretendemos mostrar cómo las honras fúnebres sirvieron como reflejo de su estatus social. A su vez, prestaremos una especial atención al impacto que tales encargos supusieron en la evolución económica e institucional del Cabildo de Curas y Beneficia-dos de ToledoThe main of this paper is the study of funeral rites requested by the elites of Toledo to the Chapter of Priests and Incumbents between 1436 and 1488. It focuses specifically on how these rituals helped to build the memory and represent the power of urban oligarchies during the Late Middle Ages. Seven obituaries are studied in order to prove that funeral rites were a reflection of the social status of the elites. In addition, special attention is paid to the impact those requests had on the economic and institutional progress of the Chapter of Priests and Incumbents of Toled

    Optimización de la respuesta a la selección artificial

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    Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Biológicas, leída en 1984.Fac. de Ciencias BiológicasTRUEProQuestpu

    Optimización de la respuesta a la selección artificial

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    Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Biológicas, leída en 1984.Fac. de Ciencias BiológicasTRUEProQuestpu

    Effect of extinction on the high-energy optical response of photonic crystals

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    An analysis of the optical response of photonic crystals in the high-order band energy range is herein presented. High and abruptly fluctuating specular reflectance is predicted for perfect lattices at those energies even in the absence of any photonic gap or pseudogap. As optical extinction is gradually introduced, it is possible to reproduce experimental results found in the literature and which have recently been the subject of an intense debate. Band structure calculations demonstrate that extinction is extraordinarily amplified in the high-energy range and is responsible for the features so far observed in that range in real crystalsConsejo Superior de Investigaciones Científicas 2005AR0070Universidad de Buenos Aires ANPCYT-BID 802Agencia Nacional de Promoción Científica y Tecnológica OC-AR03-14099Ministerio de Educación y Ciencia MAT2005-0302

    Development and Assessment of the Competence Creativity Applied to Technical Drawing

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    The results obtained after incorporating the competence “creativity” to the subject Technical Drawing of the first course of the Degree in Forestry, Technical University of Madrid, are presented in this study.At first, learning activities which could serve two functions at the same time -developing students’ creativity and developing other specific competences of the subject- were considered. Besides, changes in the assessment procedure were made and a method which analyzes two aspects of the assessment of the competence creativity was established. On the one hand, the products are evaluated by analyzing the outcomes obtained by students in the essays suggested and by establishing a parameter to assess the creativity expressed in those essays. On the other, an assessment of the student is directly carried out through a psychometric test which has been previously chosen by the team.Moreover, these results can be applied to similar or could be of general applicatio

    Inspección y análisis científico de las torres atalaya que defendieron el último reino islámico de la Península Ibérica

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    The Islamic Nasrid kingdom of Granada occupied the mountainous areas of the south-eastern area of the Iberian Peninsula. The Baetic mountain range worked as a natural frontier between the Nasrid kingdom and the Christian kingdom of Castile from 1232 to 1492. An extensive network of watchtowers was built by Nasrid to control this frontier stablishing visual communication between them and the Nasrid centre at the Alhambra citadel. Many of them are still standing, disperse through the provinces of Granada, Malaga, Almeria and the eastern parts of Jaen, Cordoba and Cadiz. Even being this military architecture protected by Spanish Heritage law, many of these medieval towers and their cultural landscapes are in severe risk. There are studies of individual towers, but any global comparative study has been developed. For this reason, within the framework of the R&D project called ‘Las atalayas que defendieron el reino nazarí de Granada. Análisis y documentación científica (Nazalaya)” (HAR2016-79689-P) financed by the Ministry of Economy, Industry and Competitiveness of Spain, the towers are being studied as individual exemplars as well as components of the same typological group. This generates a complete documentation constituted by a homogenous and exhaustively planimetry which supplements the existing information and enabling comparative analysis. Furthermore complete architectural surveys are being carried out using techniques as photogrammetry. In addition to the analysis of construction systems, the structural safety of these towers is evaluated formulating guidelines for its restoration.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Proyecto del Plan Nacional I+D+i (Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia) entitled ‘Las atalayas que defendieron el reino nazarí de Granada. Análisis y documentación científica (Nazalaya)’ (HAR2016-79689-P) Proyecto de Investigación Precompetitivo (mod. A) del Plan Propio de la Universidad de Málaga ‘La construcción de un paisaje: arquitectura de tapial en la Alta Andalucía en el siglo XIII. Estudio y análisis del sistema de torres andalusíes en el valle de Segura de la Sierra’ X Convocatoria de Proyectos de Investigación de la Fundación Pública Andaluza Centro de Estudios Andaluces en la modalidad de proyectos individuales, PRY/259/17 ‘Torres medievales y modernas conservadas en Andalucía. Documentación gráfica, análisis científico e interrelaciones

    Flow-concurrence and bandwidth ratio on the Internet

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    The relevance of flow-based monitoring in tasks such as the detection of anomalies and denial of use attacks, traffic reporting, performance evaluation, software routing among others motivates the study of the Internet traffic in terms of flows. However, by the time a network manager or practitioner start any of these tasks, they face the challenge of planning probes’ capacities, which depends on the number of concurrent flows. Unfortunately, while the bandwidth of a network or link, both in operation and in future deployments, can be known, or at least estimated in advance, nothing is known about the load in terms of concurrent flows. We aimed at filling this gap by studying the concurrence of flows with respect to the bandwidth normalized by factors such as protocol shares, timeouts, applications, time and years among others. As a result, we provide the research community with several models, based on lognormal distributions, and parameter estimates in such a way that any player in the Internet arena can estimate the number of concurrent flows in their own infrastructure. Moreover, such results emerge from a diverse set of network traces so making the extrapolation of conclusions viableThis work was partially funded by the Spanish Ministry of Economyand Competitiveness through the research project TRAFICA(MINECO/FEDER TEC2015-69417-C2-1-R

    Pre-diseño, cálculo y evolución del chasis de una motocicleta de competición

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    Este proyecto engloba una propuesta de diseño de chasis, sub-chasis y su integración con el motor mediante una placa de sujeción para una motocicleta de competición de la categoría Moto3 del mundial de motociclismo. Se comienza viendo la evolución y tipos de bastidores que ha habido a lo largo de la historia de las motocicletas, seguido de su funcionamiento y comportamiento ante diferentes solicitaciones. Con esta introducción se presentan varias propuestas de diseño de chasis, y se muestra su evolución hasta llegar a un chasis definitivo que se desarrolla y se mejora para que cumpla los requisitos de una motocicleta apta para la competición. Después se hace un proceso similar para el sub-chasis y para la placa que une el chasis al motor. Finalmente se calculan los elementos auxiliares que necesitará el conjunto y se escogerán los más aptos para completar el diseño del conjunto. ______________________________________________________________________________________________________________A design of chassis, subchassis and its integration with the engine through a holding plate is proposed in this project. The project is focused on a competition motorbike suitable for the Moto3 World Championship. At the beginning we start knowing the types and development of chassis which throughout the history of motorcycles, followed by their operation and behavior under different stresses. This introduction presents several chassis design proposals, and shows its evolution until a final chassis which is developed and improved to fulfill the requirements of our particular motorcycle. Then a similar process is done for the subchassis and the connecting plate between chassis and engine until it fulfills the requirements of the motorcycle. Finally, the needed auxiliary elements are calculated and chosen to fit the final design.Ingeniería Técnica en Mecánic
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