Seasonal concentration of cruise tourism in the Mediterranean

This research delves into analyzing the seasonality of cruise tourism in the Mediterranean by using the decomposition of the Gini index, used in the field of cruise tourism for the first time in literature. This study specifically used the decomposition to evaluate the contribution degree of each port to the global seasonal concentration of each Mediterranean region. Moreover, a cluster analysis technique (bootstrapped bagged clustering) was applied to classify the ports into homogeneous groups according to their seasonal patterns given the significant heterogeneity revealed in the major regions of the Mediterranean. The methodology applied can serve as a control and monitoring tool for measuring seasonal concentration levels in cruise tourism, allowing for policies against seasonality to be tailored in the cruise tourism segment.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Programa de FPU del Ministerio de Educació

Refrigeration Capacity and Effect of Ageing on the Operation of Cellulose Evaporative Cooling Pads, by Wind Tunnel Analysis

This study investigates the temperature reduction capacity and water consumption of a fan-pad system installed in a greenhouse located in the coastal regions of Almería. The suitability of this system for coastal zones with high environmental humidity during the summer is analyzed. Historical temperature and relative humidity series are studied, obtaining the thermal difference and maximum, medium, and minimum monthly water consumption of the pads based on the operation data of the pads. Despite the high relative humidity of the air in the hottest hours of the day, a decrease of 5.92 ºC in the mean temperature and a water consumption of 13.55 l/h per square meter of an evaporative cooling pad are obtained in the month of August. Additionally, the operation of a cellulose evaporative cooling pad installed for 3 years in a greenhouse is analyzed in a wind tunnel and compared with that of a new pad of the same model. Over time and with low maintenance, the porosity of the pad decreases due to salt incrustation. The salt incrustation makes airflow more difficult in the pad, increasing the pressure drop by 170.04%; however, the air saturation efficiency of the pad increases by 6.6% due to the greater contact time between the air and the waterMinisterio de Economía y Competitividad de España AGL2015-68050-RUnión Europea (FEDER) AGL2015-68050-

RDF-TR: Exploiting structural redundancies to boost RDF compression

The number and volume of semantic data have grown impressively over the last decade, promoting compression as an essential tool for RDF preservation, sharing and management. In contrast to universal compressors, RDF compression techniques are able to detect and exploit specific forms of redundancy in RDF data. Thus, state-of-the-art RDF compressors excel at exploiting syntactic and semantic redundancies, i.e., repetitions in the serialization format and information that can be inferred implicitly. However, little attention has been paid to the existence of structural patterns within the RDF dataset; i.e. structural redundancy. In this paper, we analyze structural regularities in real-world datasets, and show three schema-based sources of redundancies that underpin the schema-relaxed nature of RDF. Then, we propose RDF-Tr (RDF Triples Reorganizer), a preprocessing technique that discovers and removes this kind of redundancy before the RDF dataset is effectively compressed. In particular, RDF-Tr groups subjects that are described by the same predicates, and locally re-codes the objects related to these predicates. Finally, we integrate RDF-Tr with two RDF compressors, HDT and k2-triples. Our experiments show that using RDF-Tr with these compressors improves by up to 2.3 times their original effectiveness, outperforming the most prominent state-of-the-art techniques

Real interpolation of compact bilinear operators

We establish an analog for bilinear operators of the compactness interpolation result for bounded linear operators proved by Cwikel and Cobos, Kühn and Schonbek. We work with the assumption that : (A0+ A1)×(B0+ B1) −→ E0+E1 is bounded, but we also study the case when this does not hold. Applications are given to compactness of convolution operators and compactness of commutators of bilinear Calderón–Zygmund operators.Ministerio de Economía y Competitividad | Ref. MTM2013-42220-

Energy Efficiency in Greenhouse Evaporative Cooling Techniques: Cooling Boxes versus Cellulose Pads

Evaporative cooling systems using a combination of evaporative pads and extractor fans require greenhouses to be hermetic. The greatest concentration of greenhouses in the world is located in southeast Spain, but these tend not to be hermetic structures and consequently can only rely on fogging systems as evaporative cooling techniques. Evaporative cooling boxes provide an alternative to such systems. Using a low-speed wind tunnel, the present work has compared the performance of this system with four pads of differing geometry and thickness manufactured by two different companies. The results obtained show that the plastic packing in the cooling unit produces a pressure drop of 11.05 Pa at 2 m·s−1, which is between 51.27% and 94.87% lower than that produced by the cellulose pads. This pressure drop was not influenced by increases in the water flow. The evaporative cooling boxes presented greater saturation efficiency at the same flow, namely 82.63%, as opposed to an average figure of 65% for the cellulose pads; and also had a lower specific consumption of water, at around 3.05 L·h−1·m−2·°C−1. Consequently, we conclude that evaporative cooling boxes are a good option for cooling non-hermetic greenhouses such as those most frequently used in the Mediterranean basin

Gobierno de las Tecnologías de la Información en Universidades

Las Tecnologías de la Información (TI) se han convertido en un componente crítico de las universidades en todos sus ámbitos (docencia, investigación y administración). Las TI son un elemento táctico que proporciona soporte a los principales servicios universitarios, pero en el futuro están llamadas a convertirse en un elemento estratégico para la universidad. Las TI deben formar parte de la planificación institucional y ser gobernadas de manera conjunta. Hay que establecer objetivos estratégicos y seleccionar las decisiones que vamos a tomar sobre dónde, cuándo y cómo invertir en la tecnología para lograr alcanzar dichos objetivos de manera que se mejore la competitividad y la eficacia de la universidad.Comisión Sectorial de Tecnologías de la Información y las Comunicaciones de la Conferencia de Rectores de las Universidades Españolas

Acoplamiento flexible de seguridad frente a impactos

Número de publicación: ES2470915 A1 (24.06.2014) También publicado como: ES2470915 B2 (20.01.2015) Número de Solicitud: Consulta de Expedientes OEPM (C.E.O.) P201300030 (21.12.2012)Acoplamiento flexible de seguridad frente a impactos, del tipo de los utilizados en eslabones de brazos robóticos y que incorporan algún mecanismo que permite variar el nivel de carga a partir del cual entra en funcionamiento la flexibilidad del acoplamiento. El acoplamiento incorpora una pieza (1) y una pieza (2) cilíndricas huevas enfrentadas por sus bases, las cuales disponen de una multitud de hendiduras (5) y protuberancias (6) que insertan perfectamente. Un resorte helicoidal (3) apoya en la cara interior de la base de la pieza (1) y en el otro extremo del resorte (3) se fija el extremo de un cable (8), el cual atraviesa las bases de las piezas (1) y (2). El otro extremo del cable (8) se fija a la cabeza de un tornillo (7) roscado a la base de la pieza (2) y que permite tensar el cable (8) y comprimir el resorte (3).Universidad de Almerí

Localization Operators and an Uncertainty Principle for the Discrete Short Time Fourier Transform

Localization operators in the discrete setting are used to obtain information on a signal f from the knowledge on the support of its short time Fourier transform. In particular, the extremal functions of the uncertainty principle for the discrete short time Fourier transform are characterized and their connection with functions that generate a time-frequency basis is studied

Assessing the Genetic Influence of Ancient Sociopolitical Structure: Micro-differentiation Patterns in the Population of Asturias (Northern Spain)

Las poblaciones humanas de la Península Ibérica son el diverso resultado de una compleja mezcla de culturas a lo largo de la historia, y están separadas por claras barreras sociales, culturales, lingüísticas y geográficas. Las mayores diferencias genéticas entre poblaciones cercanas y relacionadas se encuentran en el tercio norte de España, y se definen por un fenómeno comúnmente llamado "micro-diferenciación". Se ha discutido cómo esta forma de estructuración genética puede relacionarse con el abrupto terreno y las sociedades antiguas del norte de Iberia, pero esto es difícil de probar en muchas regiones debido a la intensa movilidad humana de los siglos anteriores. Aun así, la comunidad autónoma española de Asturias muestra una compleja historia que parece indicar un cierto aislamiento de su población. Esto, junto con su difícil terreno lleno de profundos valles y altas montañas, la hace adecuada para realizar un estudio de estructuración genética, basado en ADN mitocondrial y marcadores del Cromosoma-Y. Nuestros análisis no sólo muestran que existen patrones de micro-diferenciación dentro del territorio asturiano, si no que estos patrones son sorprendentemente similares entre ambos marcadores. La inferencia de barreras al flujo génico también indica que las poblaciones asturianas del norte costero y del sur montañoso parecen estar relativamente aisladas del resto del territorio. Estos hallazgos se discuten a la luz de datos históricos y geográficos que, junto con evidencias anteriores, muestran que el origen de la estructuración genética actual bien pudiera estar en divisiones sociopolíticas de las eras romana y pre-romana

IOBSERVER: species recognition via computer vision

This paper is about the design of an automated computer vision system that is able to recognize the species of fish individuals that are classified into a fishing vessel and produces a report file with that information. This system is called iObserver and it is a part of project Life-iSEAS (Life program).A very first version of the system has been tested at the oceanographic vessel “Miguel Oliver”. At the time of writing a more advanced prototype is being tested onboard other oceanographic vessel: “Vizconde de Eza”. We will describe the hardware design and the algorithms used by the computer vision software.Peer Reviewe