Multivariate statistical technique over QoS variables to analyze video quality metrics on IEEE 802.11ac networks

[EN] We present the results from a measurementbasedperformance evaluation of wireless networks basedon IEEE 802.11ac standard in an indoor environment, withthe aim to analyze their performance under high definitionstreaming video applications. We focus our study on analyzingthe highest performance of these standards using off-theshelfequipment as well as the behavior of Quality of Servicevariables and how they affect to the video quality. Thus, wehave analyzed and measured these variables and have applieda multivariate statistical technique, called Factor Analysis,and finally discuss their behavior.This work was supported by the Universitat de Valencia under the projects UV-INV-PRECOMP14-207134, UVINVAE15-339582, by the Generalitat Valenciana under the project GV-2016-002 and by the Ministry of Economy under the project BIA2016-76957-C3-1-RGarcía-Pineda, M.; Felici-Castell, S.; Segura-Garcia, J. (2018). Multivariate statistical technique over QoS variables to analyze video quality metrics on IEEE 802.11ac networks. En XIII Jornadas de Ingeniería telemática (JITEL 2017). Libro de actas. Editorial Universitat Politècnica de València. 152-159. https://doi.org/10.4995/JITEL2017.2017.6572OCS15215

Subjective symptoms related to GSM radiation from mobile phone base stations : a cross-sectional study

Objectives: We performed a reanalysis of the data from Navarro et al., 2003, in which health symptoms related to microwave exposure from mobile phone base stations (BS) were explored, including data obtained in a retrospective inquiry about fear of exposure from BS. Design: Cross-sectional study. Setting: La Ñora (Murcia), Spain. Participants: Participants with known illness in 2003 were subsequently disregarded: 88 participants instead of 101 (in 2003) were analysed. Since weather circumstances can influence exposure, we restricted data to measurements made under similar weather conditions. Outcomes and methods: A statistical method indifferent to the assumption of normality was employed: namely, binary logistic regression for modelling a binary response (e.g. suffering fatigue (1) or not (0)), and so exposure was introduced as a predictor variable. This analysis was carried out on a regular basis and bootstrapping [95% percentile method] was used to provide more accurate confidence intervals. Main outcome measures Results: The symptoms most related to exposure were: lack of appetite [odds ratio (OR)] = 1.58, 95% confidence interval (95%CI) = 1.23-2.03; lack of concentration [OR = 1.54, 95% CI = 1.25- 1.89]; irritability [OR = 1.51, 95% CI = 1.23-1.85]; and trouble sleeping [OR = 1.49, 95% CI = 1.20-1.84]. Changes in -2 log likelihood showed similar results. Concerns about the BS were strongly related with trouble sleeping [OR = 3.12, 95% CI = 1.10-8.86]. The exposure variable remained statistically significant in the multivariate analysis. The bootstrapped values were similar to the asymptotic confidence intervals. Conclusion: This study confirms our preliminary results. We observed that the incidence of most of the symptoms was related to exposure levels ¿ independently of the demographic variables and some possible risk factors. Concerns about adverse effects from exposure, despite being strongly related with sleep disturbances, do not influence the direct association between exposure and sleep

Physician-perceived utility of the EORTC QLQ-GINET21 questionnaire in the treatment of patients with gastrointestinal neuroendocrine tumours: a multicentre, cross-sectional survey (QUALINETS)

Qualitat de vida relacionada amb la salut; Tumors neuroendocrins; Qüestionari QLQ-GINET21Calidad de vida relacionada con la salud; Tumores neuroendocrinos; Cuestionario QLQ-GINET21Health-related quality of life; Neuroendocrine tumours; QLQ-GINET21 questionnaireBackground and objective Patient-reported outcome measures can provide clinicians with valuable information to improve doctor-patient communication and inform clinical decision-making. The aim of this study was to evaluate the physician-perceived utility of the QLQ-GINET21 in routine clinical practice in patients with gastrointestinal neuroendocrine tumours (GI-NETs). Secondary aims were to explore the patient, clinician, and/or centre-related variables potentially associated with perceived clinical utility. Methods Non-interventional, cross-sectional, multicentre study conducted at 34 hospitals in Spain and Portugal (NCT02853422). Patients diagnosed with GI-NETs completed two health-related quality of life (HRQoL) questionnaires (QLQ-C30, QLQ-GINET21) during a single routine visit. Physicians completed a 14-item ad hoc survey to rate the clinical utility of QLQ-GINET21 on three dimensions: 1)therapeutic and clinical decision-making, 2)doctor-patient communication, 3)questionnaire characteristics. Results A total of 199 patients at 34 centres were enrolled by 36 participating clinicians. The highest rated dimension on the QLQ-GINET21 was questionnaire characteristics (86.9% of responses indicating “high utility”), followed by doctor-patient communication (74.4%), and therapeutic and clinical decision-making (65.8%). One physician-related variable (GI-NET patient volume > 30 patients/year) was associated with high clinical utility and two variables (older age/less experience treating GI-NETs) with low clinical utility. Conclusions Clinician-perceived clinical utility of QLQ-GINET21 is high. Clinicians valued the instruments’ capacity to provide a better understanding of patient perspectives and to identify the factors that had the largest influence on patient HRQoL.This study was sponsored by Ipsen

Cost-Effective eHealth System Based on a Multi-Sensor System-on-Chip Platform and Data Fusion in Cloud for Sport Activity Monitoring

eHealth systems provide medical support to users and contribute to the development of mobile and quality health care. They also provide results on the prevention and follow-up of diseases by monitoring health-status indicators and methodical data gathering in patients. Telematic management of health services by means of the Internet of Things provides immediate support and it is cheaper than conventional physical presence methods. Currently, wireless communications and sensor networks allow a person or group to be monitored remotely. The aim of this paper is to develop and assess a system for monitoring physiological parameters to be applied in different scenarios, such as health or sports. This system is based on a distributed architecture, where physiological data of a person are collected by several sensors; next, a Raspberry Pi joins the information and makes a standardization process; then, these data are sent to the Cloud to be processed. Our Cloud system stores the received data and makes a data fusion process in order to indicate the athlete's fatigue status at every moment. This system has been tested in collaboration with a small group of voluntary tri-athletes. A network simulation has been performed to plan a monitoring network for a bigger group of athletes. Finally, we have found that this system is useful for medium-term monitoring of the sports activitie

MediaDASH Tool: Plataforma Web para la Codificación, Difusión y Recepción de Videos DASH

[ES] Hoy en día el tráfico de video de internetsignifica alrededor del 65-70% del tráfico total. Se prevéque en 2019 aumente hasta el 80%. Debido a esto se hacenecesario optimizar y mejorar las tecnologías relacionadascon la transmisión de video para garantizar una calidad deexperiencia adecuada. Es por ello que se están desarrollando nuevos protocolos de transmisión de videoadaptativos basados en DASH. Debido a que su uso estáaumentando en los últimos años para realizar streamingsobre HTTP. En este artículo presentamos la herramientaMediaDASH Tool, la cual es una aplicación web quepermite de manera muy intuitiva poder comprimir ypreparar videos para su difusión con DASH. Así como suposterior visualización a través de la misma plataforma.Esta herramienta puede ser de gran utilidad para usuariosfinales que quieran disponer de su sistema DASH comotambién para investigadores que quieran testear suscontenidos multimedia haciendo uso de estos protocolos.Este trabajo ha sido parcialmente subvencionado por la Universitat de València a través de los proyectos UVINV-PRECOMP14-207134, UV-INVAE15-339582, por la Generalitat Valenciana a través del proyecto GV2016-002 y por el Ministerio de Economía a través del proyecto BIA2016-76957-C3-1-R.García-Pineda, M.; García-Costa, D.; Hannecke-Esteve, J.; Felici-Castell, S.; Segura-García, J. (2018). MediaDASH Tool: Plataforma Web para la Codificación, Difusión y Recepción de Videos DASH. En XIII Jornadas de Ingeniería telemática (JITEL 2017). Libro de actas. Editorial Universitat Politècnica de València. 7-14. https://doi.org/10.4995/JITEL2017.2017.6575OCS71

Más allá de la Realidad Virtual. Reconstrucción Acústica Virtual de antiguos teatros del Siglo de Oro. Hacia una vivencia virtual del teatro en los albores de la ultra-realidad

Nowadays, the virtual reconstruction of old and lost buildings is a hot-topic in cultural heritage. Traditionally, this reconstruction has been made with 3D graphical information, but the feeling of immersion can significantly increase with the addition of other senses. Moreover, the inclusion of emotional and cognitive dimensions to multisensory virtual perception is what will bring the concept of ultra-reality. The aim of this paper is to show the work on a virtual acoustic system, which combines graphical and acoustic rendering (using a graphical engine and an audio engine). This system was implemented to render binaural auralizations and has been used for the rendering of a 16th century Valencian theatre, the so-called 'Corral de l'Olivera', which was rebuilt several times until the 18th century. It has been modeled graphically and for acoustic simulation. In addition, the auralization of diverse theatrical extracts of diverse Spanish authors was carried out. The consequences of this work will be reflected in future contributions on immersive theatre with greater immersive and emotional sensation. Thus, we contribute to the immersive virtual recovery of theatres that are historical cultural heritage

Uso de software-defined radio en la enseñanza de sistemas de comunicaciones

En la docencia de sistemas de comunicación hay una componente teórica elevada. La percepción de los estudiantes al estudiar estas asignaturas es negativa. Este trabajo trata de explicar la motivación y la estrategia seguida para reorientar esta percepción a partir de la introducción de elementos de “Software-Defined Radio” (SDR) y “Universal Software Radio Peripherals” (USRP) en diferentes asignaturas del Grado en Ingeniería Telemática de la Universitat de València.UVSFPIE_ RMD15-314373RACHEL TEC2013-47141-C4-4-

Active learning in digital communications with low-cost software defined radio

Las comunicaciones digitales se enseñan tradicionalmente en sesiones de laboratorio desde un punto de vista teórico, utilizando plataformas de simulación. Sin embargo, el sistema de Acreditación Académica incluye la dimensión de "lo que se espera que los estudiantes sean capaces de hacer", lo que plantea la necesidad de disminuir la brecha entre las sesiones de laboratorio simuladas y un enfoque más práctico y realista. En este trabajo, proponemos una metodología para mejorar el aprendizaje de los aspectos prácticos relacionados con los cursos de Comunicaciones Digitales, así como para aumentar la motivación de los estudiantes, mediante el uso de dispositivos de radio definida por software de bajo coste. Esta metodología se ha aplicado en el Grado en Ingeniería Telemática de la Escuela Técnica Superior de Ingeniería de la Universidad de Valencia, España. Con el objetivo de mejorar el compromiso de los estudiantes de máster y de grado, se ha implementado una metodología de aprendizaje basado en proyectos. En el trabajo se describe la metodología, se describen varias actividades de laboratorio basadas en el estándar 802.11 y se dan recomendaciones para la implementación de esta metodología.UV-SFPIE PID-1353656Digital Communications have been traditionally taught in laboratory sessions from a theoretical point of view, using simulation platforms. However, current Academic Accreditation includes the dimension of “what students are expected to be able to do”, which poses the need of decreasing the gap between standard simulated laboratory sessions and more practical and realistic approaches. In this paper, we propose a methodology to enhance the learning of practical aspects related to Digital Communications courses, as well as increasing the student’s engagement, via the use of low-cost software defined radio devices. This methodology has been applied in the Degree in Telematics Engineering at the School of Engineering from the University of Valencia, Spain. With the aim of improving the engagement of both master and undergraduate students, a project based learning methodology has been implemented. In the paper, the methodology is described, several laboratory activities based on the 802.11 standard are presented, and recommendations for practice are given