135 research outputs found

    An intelligent strategy for tactical movements of UAVs in disaster scenarios

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    Unmanned Aerial Vehicles (UAVs) are envisioned as flexible and fast-deploying communication network for disaster scenarios, where the typical communication infrastructure is likely to be malfunctioning. A few works propose UAVs for building communication links autonomously between rescue team’s members in disaster scenarios. The techniques used are usually based on navigation, positioning, and signal strength processing. However, these techniques may not be enough if the objective is to provide communication services to the maximum number of victims and rescuers and not only to a few rescuers. In this situation, dissimilarity metrics, like the Jaccard distance, can provide information about whether the communication service provided to victims is efficient or not (e.g., providing a better distribution of the victims assigned to each UAV acting as service provider). We propose an intelligent strategy that allows UAVs to perform tactical movements in a disaster scenario, combining the Jaccard distance and artificial intelligence algorithms like hill climbing and simulated annealing. Our strategy maximizes the number of victims that are serviced by the UAVs while avoiding network disconnections. Also, a mobility model specifically developed for modelling the victims’ movements within the incident site of a disaster scenario is propose

    An evaluation methodology for reliable simulation based studies of routing protocols in VANETs

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    Vehicular Ad hoc networks (VANETs) have attracted much attention in the last decade. Many routing protocols have been proposed for VANETs and their performance is usually evaluated and compared using simulation-based studies. However, conducting reliable simulation studies is not a trivial task since many simulation parameters must be configured correctly. The selected parameters configuration can considerably affect the simulation results. This paper presents a methodology for conducting reliable simulations of routing protocols in VANETs urban scenarios. The proposed methodology includes relevant simulation aspects such as measurement period, selection of source-destination pairs for the communication traffic flows, number of simulations, mobility models based on road city maps, performance metrics and different analyses to evaluate routing protocols under different conditions. The proposed methodology is validated by comparing the simulation results obtained for Ad Hoc On-Demand Distance Vector (AODV) routing protocol with and without using the proposed methodology. The obtained results confirm that by using the proposed methodology, we can achieve more reliable simulations of VANETs routing protocols.Universidad de Sevilla. V Plan Propio de InvestigaciónMinisterio de Economía y Competitividad DPI2013-44278-

    On-siteDriverID: A secure authentication scheme based on Spanish eID cards for vehicular ad hoc networks

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    Security in Vehicle Ad Hoc Networks (VANETs) has been a topic of interest since the origins of vehicular communications. Different approaches have been followed as new security threats have emerged in the last few years. The approach of conditional privacy has been widely used as it guarantees authentication among vehicles but not revealing their real identities. Although the real identity of the vehicle can be traced by the authorities, the process to do that is time consuming and typically involves several entities (for instance road authorities that request the identification, license plate records bodies, a judge to allow revealing the identity associated to a license plate…). Moreover, this process is always subsequent to the detection of a road situation that requires knowing the real vehicle identities. However, in vehicular scenarios, authorities would beneficiate from knowing the real drivers’ identity in advance. We propose in this paper On-SiteDriverID, a secure protocol and its application which allows authorities’ vehicles to obtain drivers’ real identities rapidly and on demand on VANET scenarios. Thus, authorities would be able to gather information about drivers and vehicles, allowing them to act in a safer and better manner in situations such as traffic control duties or emergencies. The obtained simulation results in real VANET scenarios based on real maps guarantee that in the 60–70% of cases the proposed On-SiteDriverID successfully obtains the identity of the driver

    Los proyectos de Ingeniería electrónica en el marco de los resultados de aprendizaje EUR-ACE

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    El sello EUR-ACE® es un certificado que una agencia autorizada (en España ANECA) otorga a un título de grado o máster en ingeniería que cumple unos determinados estándares de calidad. Se trata de una marca de calidad internacionalmente reconocida que facilita la movilidad y el reconocimiento de los titulados. Uno de los resultados de aprendizaje más importantes e incluido como requisito específico del sello es el relativo a Proyectos de Ingeniería. Este artículo presenta este resultado de aprendizaje en el ámbito de las titulaciones de grado y muestra cómo puede incluirse en el caso concreto de varias asignaturas relacionadas con la Ingeniería Electrónica

    Queymi N° 16

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    Revista de difusión cultural, publicada por el INC, filial Ancash, en diciembre de 1981. Cuenta con la colaboración de autores locales y notas informativas sobre la actividad institucional del INC-FA. Contiene: Nota editorial -- Ancash en la Historia. Huaraz visto por los viajeros extranjeros, por Manuel Reyna Loli – Ancash en la historia. Dimensión integral de Chavín, por Martín Flores G. -- Monografía. Distrito de Yúngar, por José Obregón -- Actividades del INC-FA -- 2do Encuentro de teatro “Ancash 81” -- Arte Popular, por Rubén Almendradez – Comentario. En otoño después de mil año de Marcos Yauri M (reproducción del postfacio de la obra en mención, escrito por Laszzlo Schoolz) -- Doña Ñati, por Martin Flores G. -- Noche de paz (poema de Franz Gruber) - Grupos de teatros que participaron en “Ancash 81” – Crusiancash

    Queymi N° 21

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    Revista de difusión cultural, publicada por el INC, filial Ancash, en marzo de 1983. Cuenta con la colaboración de autores locales y notas informativas sobre la actividad institucional del INC-FA. Contenido: Nota Editorial – Cartas -- Personajes. El presbítero Isidro Buenaventura Mendoza Sánchez, por Augusto Alba Herrera -- Ladislao Meza en el recuerdo, por Gamaniel Palomino -- A sus órdenes, Jacinto Palacios, por Mauricio Mejía Moreno -- Opinión. Águila harpía y con cóndor, por Martin Flórez García -- Folclor. Artes populares en las fiestas del Callejón de Huaylas, por Francisco Gonzáles -- Transcripciones. Corresponsales ancashinos de Palma, por Manuel S. Reyna L. -- Literaria. Apocalipsis, por Roberto Rosario

    Queymi N° 23

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    Revista de difusión cultural, publicada por el INC, filial Ancash, en setiembre de 1983. Cuenta con la colaboración de autores locales y notas informativas sobre la actividad institucional del INC-FA. Contiene: Nota Editorial – Cartas -- Homenaje al libertador Simón Bolívar en el Bicentenario de su nacimiento – Discurso de orden, 21 de julio. Carás, por Francisco Gonzáles -- Discurso de orden, 24 de julio. Plazuela Bolívar de Huarás, por Francisco Gonzáles – Itinerario y cronología de Bolívar en el norte del Perú, por Manuel S. Reyna L. – Bolívar y la amistad, por Sergio Quijada Jara – La última frase de Bolívar – tradición de Ricardo Palma – Actividades del INC-DA – Ancash en la historia. El ambiente revolucionario en Ancash a la llegada de Luzuriaga, por Augusto Alba Herrera – Personajes. Ladislao F. Meza, por Pedro Barrantes – Aurelio Arnao Loli, por Juan de Dios Alba

    Plataforma basada en microprocesador para el aprendizaje de tecnologías inalámbricas RFID, NFC y Bluetooth

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    El Congreso TAEE 2010, organizado por la Universidad Nacional de Educación a Distancia (UNED) y la Universidad Politécnica de Madrid (UPM), se ha celebrado entre el 13 y el 15 de abril de 2010.En este trabajo se presenta el desarrollo de una plataforma, basada en un microprocesador de bajo coste, que pretende acercar a los alumnos al uso y desarrollo de aplicaciones basadas en las tecnologías inalámbricas RFID y Bluetooth. Mientras que el estándar NFC representa el ejemplo más claro del elevado crecimiento que están experimentado recientemente los dispositivos RFID, Bluetooth personifica el grado de desarrollo y uso que pueden alcanzar estas tecnologías inalámbricas gracias a los dispositivos electrónicos de uso cotidiano como son teléfonos mó viles, PDAs y PCs portátiles. Para mostrar a los alumnos el interés de ambas tecnologías, se ha desarrollado un sistema simple para la realización de trabajos prácticos en una asignatura denominada “Laboratorio de Instrumentación Electrónica”, adscrita a la titulación de Ingeniería de telecomunicaciones en la Escuela Superior de Ingenieros de la Universidad de Sevill

    A multi-stage genome-wide association study of bladder cancer identifies multiple susceptibility loci.

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    We conducted a multi-stage, genome-wide association study of bladder cancer with a primary scan of 591,637 SNPs in 3,532 affected individuals (cases) and 5,120 controls of European descent from five studies followed by a replication strategy, which included 8,382 cases and 48,275 controls from 16 studies. In a combined analysis, we identified three new regions associated with bladder cancer on chromosomes 22q13.1, 19q12 and 2q37.1: rs1014971, (P = 8 × 10⁻¹²) maps to a non-genic region of chromosome 22q13.1, rs8102137 (P = 2 × 10⁻¹¹) on 19q12 maps to CCNE1 and rs11892031 (P = 1 × 10⁻⁷) maps to the UGT1A cluster on 2q37.1. We confirmed four previously identified genome-wide associations on chromosomes 3q28, 4p16.3, 8q24.21 and 8q24.3, validated previous candidate associations for the GSTM1 deletion (P = 4 × 10⁻¹¹) and a tag SNP for NAT2 acetylation status (P = 4 × 10⁻¹¹), and found interactions with smoking in both regions. Our findings on common variants associated with bladder cancer risk should provide new insights into the mechanisms of carcinogenesis

    Current preventive strategies and management of Epstein-Barr virus-related post-transplant lymphoproliferative disease in solid organ transplantation in Europe. Results of the ESGICH Questionnaire-based Cross-sectional Survey

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    There is limited clinical evidence on the utility of the monitoring of Epstein-Barr virus (EBV) DNAemia in the pre-emptive management of post-transplant lymphoproliferative disease (PTLD) in solid organ transplant (SOT) recipients. We investigated current preventive measures against EBV-related PTLD through a web-based questionnaire sent to 669 SOT programmes in 35 European countries. This study was performed on behalf of the ESGICH study group from the European Society of Clinical Microbiology and Infectious Diseases. A total of 71 SOT programmes from 15 European countries participated in the study. EBV serostatus of the recipient is routinely obtained in 69/71 centres (97%) and 64 (90%) have access to EBV DNAemia assays. EBV monitoring is routinely used in 85.9% of the programmes and 77.4% reported performing pre-emptive treatment for patients with significant EBV DNAemia levels. Pre-emptive treatment for EBV DNAemia included reduction of immunosuppression in 50.9%, switch to mammalian target of rapamycin inhibitors in 30.9%, and use of rituximab in 14.5% of programmes. Imaging by whole-body 18-fluoro-deoxyglucose positron emission tomography (FDG-PET) is used in 60.9% of centres to rule out PTLD and complemented computer tomography is used in 50%. In 10.9% of centres, FDG-PET is included in the first-line diagnostic workup in patients with high-risk EBV DNAemia. Despite the lack of definitive evidence, EBV load measurements are frequently used in Europe to guide diagnostic workup and pre-emptive reduction of immunosuppression. We need prospective and controlled studies to define the impact of EBV monitoring in reducing the risk of PTLD in SOT recipients
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