Implementació d'una xarxa social Android per a viatgers

El projecte tracta del desenvolupament d'una xarxa social per a dispositius Android dirigida a viatgers. El software pretén facilitar la vida de les persones que els hi agrada viatjar. L'aplicació es desenvoluparà utilitzant Android Studio junt amb dos serveis externs, Firebase i Google Places.The project is about the development of a social network for Android devices aimed at travellers. The software is intended to make life easier for people who like to travel. The application will be developed using Android Studio plus the external services Firebase and Google Places

Spatial Adaptive Speckle Filtering Driven by Temporal Polarimetric Statistics and Its Application to PSI

Persistent scatterer (PS) interferometry (PSI) techniques are designed to measure ground deformations using satellite synthetic aperture radar (SAR) data. They rely on the identification of pixels not severely affected by spatial or temporal decorrelation, which, in general, correspond to pointlike PSs commonly found in urban areas. However, in urban areas, we can find not only PSs but also distributed scatterers (DSs) whose phase information may be exploited for PSI applications. Estimation of DS parameters requires speckle filtering to be applied to the complex SAR data, but conventional speckle filtering approaches tend to mask PS information due to spatial averaging. In the context of single-polarization PSI, adaptive speckle filtering strategies based on the exploitation of amplitude temporal statistics have been proposed, which seek to avoid spatial filtering on nonhomogeneous areas. Given the growing interest on polarimetric PSI techniques, i.e., those using polarimetric diversity to increase performance over conventional single-polarization PSI, in this paper, we propose an adaptive spatial filter driven by polarimetric temporal statistics, rather than single-polarization amplitudes. The proposed approach is able to filter DS while preserving PS information. In addition, a new methodology for the joint processing of PS and DS in the context of PSI is introduced. The technique has been tested for two different urban data sets: 41 dual-polarization TerraSAR-X images of Murcia (Spain) and 31 full-polarization Radarsat-2 images of Barcelona (Spain). Results show an important improvement in terms of number of pixels with valid deformation information, hence denser area coverage.This work was supported in part by the Spanish Ministerio de Economía y Competitividad and in part by the European Union FEDER funds under Project TEC2011-28201-C02-02

Gestión de recursos humanos y uso del software GP5 en el Ministerio de Cultura 2019

En la investigación titulada: Gestión de Recursos Humanos y el Uso del Software GP5 en el Ministerio de Cultura Lima 2019. Donde su objetivo general de investigación fue Determinar la relación que existe entre la Gestión de Recursos Humanos y el uso del Software GP5 del Ministerio de Cultura Lima 2019. El tipo de investigación es básica, el nivel de investigación es descriptivo correlacional, el diseño de la investigación es no experimental transversal y el enfoque es cuantitativo. La muestra estuvo conformada por 120 colaboradores de Ministerio de Cultura. La técnica que se utilizó es la encuesta y los instrumentos de recolección de datos fueron dos cuestionarios aplicados a los colaboradores. Para la validez de los instrumentos se utilizó el juicio de expertos y para la confiabilidad de cada instrumento se utilizó el alfa de Cronbach que salió muy alta en ambas variables: Variable 1 Gestión de Recursos Humanos 0,932 y variable 2 Uso del Software GP5 0,923. Con referencia al objetivo general: Determinar la relación que existe entre la Gestión de Recursos Humanos y el Uso del Software GP5, según los trabajadores del ministerio de cultura Lima 2019; se concluye, que existe relación directa y significativa entre la Identificación institucional y uso del Software GP5. Lo que se demuestra con el estadístico de Rho Spearman (sig. bilateral = .000 < 0.01; Rho = .857**)

Mejora de proceso para aumentar la productividad en la línea de soldadura de válvulas en la empresa HIGH TECH SERVICE S.A.C., San Juan de Lurigancho, 2019

La presente investigación trata de la mejora de procesos para aumentar la productividad en la línea de soldadura de válvulas en la empresa HIGH TECH SERVICE S.A.C., San Juan de Lurigancho, 2019, con el fin de solucionar los problemas que afectan el rendimiento de la productividad. La investigación por su finalidad es de tipo aplicada, por su nivel explicativo, enfoque cuantitativo, por su diseño es cuasi experimental y de alcance temporal longitudinal. La unidad de estudio es el proceso de soldeo de válvulas, la población está definida como la producción diaria de válvulas, basado en veinte días para un cliente específico relacionado en un mes, así mismo la implementación de la mejora de propuesta se desarrolló durante el mes de octubre, ya que presentaba muchos problemas en los tiempos de entrega de trabajos, insumos de baja calidad, ubicación inadecuada de insumos, iluminación insuficiente, subcontrato de maquinaria produciendo constantes reprocesos que afectaban la producción, por lo que se realizó una mejora del proceso dividido en cada sección a trabajarse, para tener un tiempo estándar de cada tarea a ser ejecutada, logrando así la eliminación, sustitución y/o reducción de aquellas actividades que no agregan valor al servicio. Se utilizó el programa de Microsoft Excel y el SPSS V. 24, para procesar datos del test antes y test después, de la forma descriptiva e inferencial. Para la aplicación de la mejora de proceso se desarrolló en base al estudio del trabajo empleando los ocho pasos de Kanawaty, así mismo se basó en las dimensiones, de estudio de métodos y estudio de tiempos, obteniendo así un tiempo estándar de 173.96 para una toma antes y de 120.70 una toma después, basado en cálculos de tolerancias de 80% y calificación del 15%. Según valores frecuentados por la OIT. Con la finalidad de contrastar la hipótesis de investigación se produjo primero un análisis de normalidad para verificar el comportamiento de la serie de los datos aplicando el estadígrafo de Shapiro Wilk, dado que los datos arrojaron un comportamiento no paramétrico se utilizó el estadígrafo de Wilcoxon para la contratación de la hipótesis general y específicas. Por último, se pudo concluir que la mejora de proceso en la línea de soldadura de válvulas en la empresa HIGH TECH SERVICE S.A.C., hubo in aumento de la productividad, eficiencia y eficacia, por tal motivo es que se le recomienda la utilización de esta herramienta en los demás procesos, para la compañía

Security Assessment of the Spanish Contactless Identity Card

The theft of personal information to assume the identity of a person is a common threat. Individual criminals, terrorists, or crime rings normally do it to commit fraud or other felonies. Recently, the Spanish identity card, which provides enough information to hire on-line products such as mortgages or loans, was updated to incorporate a Near Field Communication (NFC) chip as electronic passports do. This contactless interface brings a new attack vector for these criminals, who might take advantage of the RFID communication to secretly steal personal information. In this paper, we assess the security of contactless Spanish identity card against identity theft. In particular, we evaluated the resistance of one of the contactless access protocol against brute-force attacks and found that no defenses were incorporated. We suggest how to avoid brute-force attacks. Furthermore, we also analyzed the pseudo-random number generator within the card, which passed all performed tests with good results.MINECO CyCriSec (TIN2014-58457-R).University of Zaragoza and Centro Universitario de la Defensa UZCUD2016-TEC-06.Project TEC2015-69665-R (MINECO/FEDER, UE)

Polarimetric Approaches for Persistent Scatterers Interferometry

In previous works, a general framework to exploit polarimetric diversity to optimize the results of persistent scatterers interferometry (PSI) was presented, but tested only with dual-pol data. In this paper, the performance of these algorithms is assessed using fully polarimetric data, acquired by the Radarsat-2 satellite over the urban area of Barcelona, Spain. In addition, two new highly efficient polarimetric optimization methods, mean intensity polarimetric optimization and joint diagonalization-based polarimetric optimization, are introduced and evaluated. Given the variety of dual-pol configurations provided by current polarimetric satellites, such as TerraSAR-X and Radarsat-2, and the upcoming launch of Sentinel-1, ALOS-2, and Radarsat Constellation Mission, a study has been also carried out to determine the best performing dual-pol configurations for polarimetric PSI. Subsidence maps of the area of study are computed for single-pol, dual-pol, and full-pol data, which show the increase in pixel density with valid deformation results as more polarimetric information is made available. In particular, for full-pol data we get an increase of up to 2.5 times more pixels for coherence-based PSI techniques (degraded resolution), and over four times more for amplitude-based approaches (full resolution), in comparison with single-pol data. Both higher density and quality of pixels yield better results in terms of coverage and accuracy.This work was supported in part by the Spanish Ministerio de Economía y Competitividad and European Union FEDER funds under Project TEC2011-28201-C02-02

Artificial intelligence tools for academic management: assigning students to academic supervisors

[EN] In the last few years, there has been a broad range of research focusing on how learning should take place both in the classroom and outside the classroom. Even though academic dissertations are a vital step in the academic life of both students, as they get to employ all their knowledge and skills in an original project, there has been limited research on this topic. In this paper we explore the topic of allocating students to supervisors, a time-consuming and complex task faced by many academic departments across the world. Firstly, we discuss the advantages and disadvantages of employing different allocation strategies from the point of view of students and supervisors. Then, we describe an artificial intelligence tool that overcomes many of the limitations of the strategies described in the article, and that solves the problem of allocating students to supervisors. The tool is capable of allocating students to supervisors by considering the preferences of both students and supervisors with regards to research topics, the maximum supervision quota of supervisors, and the workload balance of supervisors.Sanchez-Anguix, V.; Chalumuri, R.; Alberola Oltra, JM.; Aydogan, R. (2020). Artificial intelligence tools for academic management: assigning students to academic supervisors. IATED. 4638-4644. https://doi.org/10.21125/inted.2020.1284S4638464

Changing students' attitudes towards statistics through project-based learning in aerospace engineering

[EN] The application of project-based learning (PBL) in a course of statistics in the BSc. Degree in Aerospace Engineering at the Higher Technical School of Design Engineering at Universitat Politècnica de València has led to a significant and positive change in students¿ attitude towards learning and acquisition of statistical concepts. More specifically, PBL has provided the opportunity for students to overcome the limitations and preconceived barriers of classic learning methodologies and lectures, by applying statistical tools to improve the design of a cardboard glider. The PBL strategy is implemented by means of a long-term project that is carried out in teams ranging from three to four students. The project is closely supervised by the laboratory lecturers, who act as mentors to the students throughout the whole term. At the initial stage, all the teams are given the same initial design of a cardboard glider, and students apply descriptive statistics to characterize and describe the flight of the original design. Then, students are given a flight benchmark that they should improve with their final designs. By applying inference, regression, and design of experiment tools, students modify the original design to beat the benchmark. The results of a survey that has been conducted suggest that, through this methodology, students not only apply and experiment with the concepts that they learn, but their motivation, engagement, and interest in statistics is also increased.The authors would like to thank the UPV and their support by funding this article with Education Improvement and Innovation Project (PIME-185).Trull, O.; Sempere-Ferre, F.; Martínez Alzamora, MN.; Sanchez-Anguix, V. (2021). Changing students' attitudes towards statistics through project-based learning in aerospace engineering. IATED Academy. 11540-11545. https://doi.org/10.21125/edulearn.2021.2416S115401154

Reaching unanimous agreements within agent-based negotiation teams with linear and monotonic utility functions

[EN] In this article, an agent-based negotiation model for negotiation teams that negotiate a deal with an opponent is presented. Agent-based negotiation teams are groups of agents that join together as a single negotiation party because they share an interest that is related to the negotiation process. The model relies on a trusted mediator that coordinates and helps team members in the decisions that they have to take during the negotiation process: which offer is sent to the opponent, and whether the offers received from the opponent are accepted. The main strength of the proposed negotiation model is the fact that it guarantees unanimity within team decisions since decisions report a utility to team members that is greater than or equal to their aspiration levels at each negotiation round. This work analyzes how unanimous decisions are taken within the team and the robustness of the model against different types of manipulations. An empirical evaluation is also performed to study the impact of the different parameters of the model.This work is supported by TIN2008-04446, PROMETEO/2008/051, TIN2009-13839-C03-01, CSD2007-00022 of the Spanish government, and FPU Grant AP2008-00600 awarded to Victor Sanchez-Anguix. This paper was recommended by Associate Editor X. Wang.Sanchez-Anguix, V.; Julian Inglada, VJ.; Botti, V.; García-Fornes, A. (2012). Reaching unanimous agreements within agent-based negotiation teams with linear and monotonic utility functions. IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics. 42(3):778-792. https://doi.org/10.1109/TSMCB.2011.2177658S77879242

Analysis of MBLOCA and LBLOCA success criteria in VVER-1000/V320 reactors. New proposals for PSA Level 1

The specific configuration of the safety systems in VVER-1000/V320 reactors allows a comprehensive study of the Loss of Coolant Accident (LOCA). In the present paper, a verification of the success criteria of the event trees headers for the medium and large break LOCA sequences is conducted. A detailed TRACEV5P5 thermal-hydraulic model of the reactor has been developed, including all safety systems. When analyzing the results of all sequences, some conservatism is observed in certain specific configurations as the success criterion of some headers is not consistent with the classic PSA level 1. Therefore, new proposals for the LOCA event trees are performed based on a reconfiguration of LOCA break ranges and the use of the expanded event trees approach