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

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)

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

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

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

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

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

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

Towards a full understanding of the growth dynamics and optical response of self-assembled photonic colloidal crystal films

Recent advances in the comprehension of the growth dynamics of colloidal crystal films opens the door to rational design of experiments aiming at fabricating lattices in which the density of intrinsic defects is minimized. Since such imperfections have a dramatic effect on scattered light of wavelength smaller than the lattice constant, the evaluation of the experimental optical response at those energy ranges, based on the comparison to rigorous calculations, is identified as the most sensitive guide to accurately evaluate the progress towards the actual realization of defect-free colloidal crystals.Ministerio de Ciencia y Educación MAT200503028Consejo Superior de Investigaciones Científicas 2005AR007

Interplay between crystal-size and disorder effects in the high-energy optical response of photonic crystal slabs

Experimental reflectance spectra have been obtained for colloidal crystals whose widths ranged from one to several sphere monolayers, and their features in the higher order band energy range have been reproduced theoretically. In order to fit the measured data, optical extinction has been introduced in the theoretical model, which accounts for structure imperfections and disorder, the main sources of losses in an actual measurement. A complex spectrum in the high frequency region is observed even for one ordered monolayer, being this peak structure gradually modified as more layers are piled up. This allowed us to identify which peaks are reminiscent of the optical reflectance features of a single close-packed layer and which are the result of building up a three dimensional periodicity. A clear correlation between the amount of extinction introduced in the fitting and the slab width has been found, which demonstrates that wider real crystals produce less diffusely scattered light. At the same time, we find that the optical response of thinner crystals is more robust against the introduction of extinction than that of thicker ones, for which the effect is dramatic.Consejo Superior de Investigaciones Científicas 2005AR0070Universidad de Buenos Aires ANPCYT-BID 802Agencia Nacional de Promoción Científica y Tecnológica OC-AR03-14099Ministerio de Ciencia y Educación MAT2005-0302

Physical origin of the high energy optical response of three-dimensional photonic crystals

The physical origin of the optical response observed in three-dimensional photonic crystals when the photon wavelength is equal or lower than the lattice parameter still remains unsatisfactorily explained and is the subject of an intense and interesting debate. Herein we demonstrate for the first time that all optical spectra features in this high energy region of photonic crystals arise from electromagnetic resonances within the ordered array, modified by the interplay between these resonances with the opening of diffraction channels, the presence of imperfections and finite size effects. AU these four phenomena are taken into account in our theoretical approach to the problem, which allows us to provide a full description of the observed optical response based on fundamental phenomena as well as to attain fair fittings of experimental results.Consejo Superior de Investigaciones Científicas 2005AR0070Universidad de Buenos Aires ANPCYT-BID 802Agencia Nacional de Promoción Científica y Tecnológica OC-AR03-14099Ministerio de Ciencia y Educación MAT2005-0302

Optimización de la respuesta a la selección artificial

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