Novetats

Analisis y propuesta de ampliación de la terminal corporativa del aeropuerto de Barcelona-El Prat

UPCommons - dv., 07/14/2017 - 11:02
Analisis y propuesta de ampliación de la terminal corporativa del aeropuerto de Barcelona-El Prat Marin Garcia, Alba This document carries out the theoretical project of extension of the corporate terminal of the Barcelona-El Prat's Airport. This project has two aims: In one hand tries to determine the prognosis of corporate traffic for the airport in an average horizon of design following the indications of the pertinent aeronautical organisms. In the other, use the data obtained to project an extension of the currentterminalbuildingthatfollowfulfillingalltheaeronauticalrulesandthatitcanabsorb the new traffic, as well as place the offices of the companies that operate in the building. Tocarryoutthefirstpoint, theprognosisandthepertinentdiagnostic, asearchofthemost extended methods for the forecast calculation is done. Then which is better for the horizon proposed is chosen and the projection is done. Once we have the results, following the percentages of use of the terminal, the new percentages of use expected for the future are calculated. We analyze if the current building will be able to house all the traffic, and we obtain that it is not, so we propose the extension. In the second part, the part of design of the extension, we analyse the two terrain options available. Once chosen the terrain, we project a smaller continuation of the current terminal. As now there are two terminals joined, we propose to do a separation of fluxes to do even more exclusive the terminal, due to the fact that the passengers will use only the existent terminal, and the new will house new offices where the companies and/or AENA will work. We then design the new spaces to fulfil the new needs. Once done the design, we calculate the structure and the foundation. We opt for a metallic structure. Later on we calculate the cover. Also we calculate the closings because they fulfil the thermal requirements. Finally we do the planning of the work with the use of Gantt's Diagram. This planning is accompanied by an approximated budget of what would cost to carry this project out. Wepresentinthisprojectallthenecessarydocumentstojustifythedesignandcalculation, as well as to carry out his building. The project is presented in an academic field, as a requirement for the obtention of the title of Grau en Enginyeria en Aeronavegaci´o/ Grau en Enginyeria en Aeroports.
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Fabricació de nanopartícules d'òxids de ferro mitjançant mòlta mecànica

UPCommons - dv., 07/14/2017 - 10:58
Fabricació de nanopartícules d'òxids de ferro mitjançant mòlta mecànica Navalón Sancho, Marc L’ús dels òxids de ferro per a tractament d'aigües i sòls contaminats ha estat investigat per la seva gran adsorció de contaminants com el arsènic. En aquest treball s’ha reduït la mida de dos minerals d’òxid de ferro (hematita) des d’una grandària micronitzada fins a escala propera a la nanomètrica mitjançant la mòlta mecànica en un medi humit. La finalitat és obtenir un mètode general que permeti una efectiva reducció de la mida de partícula per millorar la reactivitat final del producte. Les variables estudiades en el procés de molturació han estat el temps de mòlta i el comportament del additiu poliacrilat de sodi que actua com a dispersant. El producte molturat s'ha caracteritzat per difracció làser, obtenint una distribució de mida de les partícules compresa entre 100 i 200 nm amb només 10 hores de mòlta. A més, mitjançant la microscòpia electrònica de rastreig (SEM) s’ha estudiat la morfologia de les partícules. Treballant amb diverses concentracions de dispersants, s’ha observat que amb una de 0,5 g/l s’aconsegueix una bona dispersió. Uns altres aspectes estudiats són l’estabilitat del mineral en presència del dispersant i la separació del producte molturat per permetre estudiar propietats importants com ara la superfície específica.
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Procesado de espectros raman mediante técnicas de máxima entropía y ajuste por mínimos cuadrados

UPCommons - dv., 07/14/2017 - 10:56
Procesado de espectros raman mediante técnicas de máxima entropía y ajuste por mínimos cuadrados Ramos, A; Rey, A; Yúfera Gomez, José Manuel; Ruiz Moreno, Sergio
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01. Emila Summer Workshop

UPCommons - dc., 07/12/2017 - 11:42
01. Emila Summer Workshop Mascaró, Josep Primera part de la sessió amb la conferència de Josep Mascaró, Cap de Serveis, Projectes i Obres del Consorci Parc de Collsarola, per EMILA Summer Workshop.
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Análisis frecuencial del campo eléctrico que recorre un amplificador óptico semiconductor no lineal de onda progresiva

UPCommons - dc., 07/12/2017 - 11:34
Análisis frecuencial del campo eléctrico que recorre un amplificador óptico semiconductor no lineal de onda progresiva Pont, J; Ruiz Moreno, Sergio
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1Gb/s service planning on standard PON technologies

UPCommons - dc., 07/12/2017 - 11:22
1Gb/s service planning on standard PON technologies Larrabeiti, David; Sánchez, Rafael; Hernández, José A. Tutorial impartit dins del marc del 2nd International Workshop on Elastic Networks Design and Optimisation (ELASTICNETS 2017).
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18. Sense sostre ni llei

UPCommons - dc., 07/12/2017 - 11:21
18. Sense sostre ni llei Delgado, Manuel Conferència de Manuel Delgado, Antropòleg (UB) pel cicle Slowinfo 2na edició.
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Topology spectrum metrics-based resource assignment strategies in EONs

UPCommons - dc., 07/12/2017 - 11:02
Topology spectrum metrics-based resource assignment strategies in EONs Amazonas, José Roberto Tutorial impartit dins del marc del 2nd International Workshop on Elastic Networks Design and Optimisation (ELASTICNETS 2017).
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Combining Fog and cloud : a novel opportunity for IoT services deployment

UPCommons - dc., 07/12/2017 - 10:48
Combining Fog and cloud : a novel opportunity for IoT services deployment Marín Tordera, Eva Tutorial impartit dins del marc del 2nd International Workshop on Elastic Networks Design and Optimisation (ELASTICNETS 2017).
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Reducing false positives in network applications with adaptive cuckoo filters

UPCommons - dc., 07/12/2017 - 10:37
Reducing false positives in network applications with adaptive cuckoo filters Reviriego, Pedro Tutorial impartit dins del marc del 2nd International Workshop on Elastic Networks Design and Optimisation (ELASTICNETS 2017).
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Time correlation of the intercell to intracell interference ratio in a W-CDMA network

UPCommons - dc., 07/12/2017 - 10:27
Time correlation of the intercell to intracell interference ratio in a W-CDMA network Adelantado, Ferran; Sallent Roig, José Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon W-CDMA performance is tightly coupled to the amount of interference in the air interface and eventually depends on many strongly interrelated system parameters that need to be suitably managed through radio resource management (RRM) strategies in order to achieve a high efficiency. Interference characterisation in terms of average and standard deviation, which are suitable for radio network planning, may not suffice for a proper RRM design because of its inherently dynamic nature. The time correlation of the interference and the main system level parameters affecting its dynamics are raised: shadow fading, mobile speed, traffic characteristics and cell load.
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Managing radio network congestion in UTRA FDD

UPCommons - dc., 07/12/2017 - 10:22
Managing radio network congestion in UTRA FDD Pérez Romero, Jordi; Sallent Roig, José Oriol; Agustí Comes, Ramon; Sánchez, Juan The presence of different service classes in the context of 3G mobile communication systems opens up new possibilities to exploit the spectrum in an efficient way. In the search of such a high efficiency, radio network congestion may arise and it is mandatory to include suitable algorithms to deal with these situations. Here, congestion control mechanisms in the radio interface of UTRA FDD are proposed and analysed. Results show that under congestion it seems more suitable to adopt firm and strict rate control decisions rather than softer policies.
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A novel distributed fiber-optic strain sensor

UPCommons - dc., 07/12/2017 - 10:11
A novel distributed fiber-optic strain sensor García Hernández, Miguel J.; Ortega Redondo, Juan Antonio; Chávez Domínguez, Juan Antonio; Salazar Soler, Jorge; Turó Peroy, Antonio The theory of operation of a fiber-optic-based strain sensor system, suitable for long structures, is described. The proposed sensor design is composed of several hundreds of sections separated by reflectors in order to monitor structures of more than 1 km of length. A quasi-distributed sensor structure accomplishes the best condition monitoring, where each section of the sensor integrates the measured magnitude, obtaining a value associated to the average shortening or elongation in this section. Tools for the design of the optical reflectors of the sensor are also provided, including a study of the optical noise due to multireflection within the system.
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Dynamic configuration of partitioning in spark applications

UPCommons - dl., 07/10/2017 - 11:44
Dynamic configuration of partitioning in spark applications Gounaris, Anastasios; Kougka, Georgia; Tous Liesa, Rubén; Tripiana, Carlos; Torres Viñals, Jordi Spark has become one of the main options for large-scale analytics running on top of shared-nothing clusters. This work aims to make a deep dive into the parallelism configuration and shed light on the behavior of parallel spark jobs. It is motivated by the fact that running a Spark application on all the available processors does not necessarily imply lower running time, while may entail waste of resources. We first propose analytical models for expressing the running time as a function of the number of machines employed. We then take another step, namely to present novel algorithms for configuring dynamic partitioning with a view to minimizing resource consumption without sacrificing running time beyond a user-defined limit. The problem we target is NP-hard. To tackle it, we propose a greedy approach after introducing the notions of dependency graphs and of the benefit from modifying the degree of partitioning at a stage; complementarily, we investigate a randomized approach. Our polynomial solutions are capable of judiciously use the resources that are potentially at user's disposal and strike interesting trade-offs between running time and resource consumption. Their efficiency is thoroughly investigated through experiments based on real execution data.
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Advanced CFD&HT numerical modeling of solar tower receivers

UPCommons - dl., 07/10/2017 - 11:29
Advanced CFD&HT numerical modeling of solar tower receivers Colomer Rey, Guillem; Chiva Segura, Jorge; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio This paper presents an advanced methodology for the detailed modeling of the heat transfer and fluid dynamics phenomena in solar tower receivers. It has been carried out in the framework of a more ambitious enterprise which aims at modeling all the complex heat transfer and fluid dynamics phenomena present in central solar receivers. The global model is composed of 4 sub-models (heat conduction, two-phase flow, thermal radiation and natural convection) which are described.
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An invitation to singular symplectic geometry

UPCommons - dl., 07/10/2017 - 11:18
An invitation to singular symplectic geometry Miranda Galcerán, Eva; Delshams Valdés, Amadeu; Planas Bahi, Arnau; Oms, Cedric; Dempsey Bradell, Roisin Mary In this paper we analyze in detail a collection of motivating examples to consider bm- symplectic forms and folded-type symplectic structures. In particular, we provide models in Celestial Mechanics for every bm-symplectic structure. At the end of the paper, we introduce the odd-dimensional analogue to b-symplectic manifolds: b-contact manifolds.
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Optimal level sets for representing a bivariate density function

UPCommons - dl., 07/10/2017 - 10:40
Optimal level sets for representing a bivariate density function Delicado Useros, Pedro Francisco; Vieu, Philippe We deal with the problem of representing a bivariate density function by level sets. The choice of which levels are used in this representation are commonly arbitrary (most usual choices being those with probability contents .25, .5 and .75). Choosing which level is (or which levels are) of most interest is an important practical question which depends on the kind of problem one has to deal with as well as the kind of feature one wishes to highlight in the density. The approach we develop is based on minimum distance ideas.
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BASS: boundary-aware superpixel segmentation

UPCommons - dl., 07/10/2017 - 09:58
BASS: boundary-aware superpixel segmentation Rubio Romano, Antonio; Yu, Longlong; Simó Serra, Edgar; Moreno-Noguer, Francesc We propose a new superpixel algorithm based on exploiting the boundary information of an image, as objects in images can generally be described by their boundaries. Our proposed approach initially estimates the boundaries and uses them to place superpixel seeds in the areas in which they are more dense. Afterwards, we minimize an energy function in order to expand the seeds into full superpixels. In addition to standard terms such as color consistency and compactness, we propose using the geodesic distance which concentrates small superpixels in regions of the image with more information, while letting larger superpixels cover more homogeneous regions. By both improving the initialization using the boundaries and coherency of the superpixels with geodesic distances, we are able to maintain the coherency of the image structure with fewer superpixels than other approaches. We show the resulting algorithm to yield smaller Variation of Information metrics in seven different datasets while maintaining Undersegmentation Error values similar to the state-of-the-art methods. © 20xx IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
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Reasoning about river basins: WaWO+ revisited

UPCommons - dl., 07/10/2017 - 08:56
Reasoning about river basins: WaWO+ revisited Oliva Felipe, Luís Javier; Gómez Sebastià, Ignasi; Verdaguer, M.; Sànchez-Marrè, Miquel; Poch Espallargas, Manel; Cortés García, Claudio Ulises This paper characterizes part of an interdisciplinary research effort on Artificial Intelligence (AI) techniques and tools applied to Environmental Decision-Support Systems (EDSS). WaWO+ the ontology we present here, provides a set of concepts that are queried, advertised and used to support reasoning about and the management of urban water resources in complex scenarios as a River Basin. The goal of this research is to increase efficiency in Data and Knowledge interoperability and data integration among heterogeneous environmental data sources (e.g., software agents) using an explicit, machine understandable ontology to facilitate urban water resources management within a River Basin. © . This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
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Dielectric spectroscopy studies of low-disorder and low-dimensional materials

UPCommons - dl., 07/10/2017 - 02:33
Dielectric spectroscopy studies of low-disorder and low-dimensional materials Tripathi, Pragya In this thesis we employ dielectric spectroscopy (in different implementations) to study the dielectric properties of different materials ranging from completely disordered supercooled liquids to low-disorder solids with only ratcheting reorientational motions, to low-dimensional systems such as thin films or needle-like crystals. The probed material properties include the electrical conductivity, the space-charge processes due to sample heterogeneities, molecular dynamics, hydrogen-bond dynamics, and phase-transition temperature and kinetics. To study materials in thin film form, we implement silicon-based interdigital electrode devices, which we calibrate to obtain their equivalent capacity in vacuum. We also probe two-dimensional samples obtained by intercalating (sandwiching) organic molecules between parallel graphite oxide sheets. We study both organic and hybrid (organic-inorganic) films, and compared the results with the bulk counterpart of the same materials. Rhodamine films are deposited by two different procedures starting from rhodamine 6G chloride: solution-deposited films are ionic and ordered, while vacuum-deposited films consist of a different, neutral species, namely rhodamine19, due to decomposition of rhodamine 6G upon sublimation. Both types of films display variable-range hopping electronic conduction, and a conductivity-induced space-charge relaxation. Solution deposited films display a dipolar relaxation, absent in rhodamine 19 films. We assign the dipolar relaxation to some intramolecular motion involving the charged nitrogen of the Rhodamine and the chlorine counter-ion. We also performed studies on hybrid films of cadmium iodide covalently attached to ethylamine (CdI2EA), deposited by the Langmuir-Blodgett process. Bulk CdI2EA material has a solid-to-solid (structural) phase transition, which in the Langmuir-Blodgett films occurs 5 degrees higher in temperature. The films displayed a dielectric relaxation dynamics absent in the bulk, and which is either due to the existence of molecular motions in the looser structure of the film, or to the motion of teh surfactant covalently attached to CdI2EA for Langmuir-Blodgett film deposition. Another example of low-dimensional material is biclotymol, whose supercooled liquid form crystallizes into a metastable solid phase which consists of one-dimensional needle-like crystallites. The crystallization kinetics of bicotymol is a textbook example of the Avrami law with exponent n = 2 resulting from a temperature independent nucleation rate of the crystallites followed by unidimensional growth. The instability of the supercooled liquid phase may be related to the existence of fast secondary relaxation dynamics. The last two chapters of the thesis focus on ethane derivatives with distinct side groups, namely tetrachloroethane and ethanolamine. The solid phase of tetrachloroethane displays three distinct relaxation processes. We carry out molecular dynamic simulations to identify the three processes: the slowest is a cooperative reorientational dynamics whereby the molecules rotate by passing through an intermediate equivalent state; such collective relaxation is accompanied by a ¿precursor¿ single-molecule relaxation. The third process is a non-cooperative ratcheting motion between the equilibrium orientation and a high-energy orientation. In ethanolamine we observe the existence of a metastable solid phase besides the known stable one. A very prominent relaxation process is observed in both solid phases and in the liquid. The ubiquity of this relaxation indicates that it is related to local fluctuations of the hydrogen-bond network between the molecules. The same relaxation is also present when ethanolamine is sandwiched between graphite oxide sheets, but it is slower and characterized by a broader distribution of relaxation times due to the interaction with the graphite oxide matrix.; En esta tesis utilizamos la espectroscopia dieléctrica para estudiar las propiedades dieléctricas de diferentes materiales que van desde líquidos subenfriados completamente desordenados a sólidos de bajo desorden con movimiento de reorientación, hasta sistemas de baja dimensionalidad tales como películas delgadas o cristales casi unidimensionales. Las propiedades estudiadas incluyen la conductividad eléctrica, los procesos de carga espacial debido a las heterogeneidades de la muestra, la dinámica molecular, la dinámica de enlaces por puente de hidrógeno, y la cinética de cristalización. Para el estudio de materiales en forma de película delgada, se han implementado nuevos dispositivos de electrodo interdigital a base de silicio. Muestras bidimensionales han sido obtenidas también por intercalación de moléculas orgánicas entre planos atómicos de óxido de grafito. Estudiamos películas orgánicas e híbridas orgánicas-inorgánicas depositadas mediante procedimientos diferentes, y comparamos los resultados con las fases puras de los mismos materiales. Obtenemos películas ordenadas de rodamina 6G clorada por crecimiento desde solución, y películas amorfas de rodamina 19 por condensación de vapor en vacío. Ambos tipos de películas presentan una conducción electrónica por salto de electrones y una relajación de carga espacial. Las películas de rodamina 6G clorada muestran además una relajación dipolar, que se asigna a movimientos intramoleculares que involucran la carga asociada al nitrógeno de la rodamina 6G y al átomo de cloro. También se han estudiado películas híbridas de ioduro de cadmio covalentemente unido a etilamina (CdI2EA), depositadas mediante el método Langmuir-Blodgett. El material en fase “bulk” presenta una transición estructural, que en la película delgada aparece a una temperatura superior de unos 5 K. Las películas presentan una relajación dinámica ausente en el material puro y que es debida a la existencia de movimientos moleculares en la estructura de la película (menos densa), o bien al movimiento del surfactante que ha sido enlazado químicamente al CdI2EA para lograr la deposición. Otro ejemplo distinto de material de baja dimensionalidad es el biclotymol, para el que el líquido subenfriado cristaliza en una fase sólida que consiste en cristales unidimensionales (en forma de aguja). La cinética de cristalización del bicotymol es un ejemplo perfecto de la ley de Avrami con exponente n = 2, resultante de una tasa de nucleación independiente de la temperatura, seguida por un crecimiento unidimensional. La inestabilidad de la fase líquida subenfriada puede estar relacionada con la existencia de dinámicas moleculares rápidas. Los dos últimos capítulos de la tesis se centran en dos derivados del etano con grupos laterales distintos, a saber, tetracloroetano y etanolamina. La fase sólida del tetracloroetano muestra tres procesos de relajación distintos. Mediante simulaciones moleculares se han podido identificar los tres procesos: el más lento es un proceso cooperativo en el que las moléculas “giran” sobre si mismas pasando por un estado equivalente intermedio; esta relajación colectiva se acompaña de una relajación "precursora", correspondiente al movimiento de una sola molécula. El tercer proceso es una rotación, no cooperativa, entre la orientación de equilibrio y una orientación de alta energía.
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