Optimization of unequal error protection AL-FEC scheme via adapted simulated annealing

We adapt simulated annealing for speeding up the search of optimal configurations for protecting video transmission over IP networks. The considered protection scheme is a version of the Pro-MPEG COP3 FEC codes, consisting in using several matrices of unequal size per FEC block

Adaptive protection scheme for MVC-encoded stereoscopic video streaming in IP-based networks

We present an adaptive unequal error protection (UEP) strategy built on the 1-D interleaved parity Application Layer Forward Error Correction (AL-FEC) code for protecting the transmission of stereoscopic 3D video content encoded with Multiview Video Coding (MVC) through IP-based networks. Our scheme targets the minimization of quality degradation produced by packet losses during video transmission in time-sensitive application scenarios. To that end, based on a novel packet-level distortion model, it selects in real time the most suitable packets within each Group of Pictures (GOP) to be protected and the most convenient FEC technique parameters, i.e., the size of the FEC generator matrix. In order to make these decisions, it considers the relevance of the packet, the behavior of the channel, and the available bitrate for protection purposes. Simulation results validate both the distortion model introduced to estimate the importance of packets and the optimization of the FEC technique parameter values

The architecture in the catalan textile industry: Can Bagaria and the iron constructive techniques

[EN] The present paper focuses on the historic Can Bagaria factory in Cornellá de Llobregat, Barcelona. From its contextualization and constructive characterization, the culminating moment of construction is exemplified in a time characterized by the industrial boom and technological innovation (19th and 20th centuries). The development of iron and cast iron structures, in combination with traditional brick masonry, helped the gestation of a new type of porticoed, bidirectional and isostatic architectural type, of which Can Bagaria is found to represent one of the most evolved examples, through the analysis of its various structural components and the knowledge of its typological and technological precedents.[ES] El presente artículo se centra en la fábrica histórica de Can Bagaria en Cornellà de Llobregat, Barcelona. A partir de su contextualización y caracterización constructiva se ejemplifica el momento culmen de la construcción en una época marcada por el auge industrial y la innovación tecnológica que experimenta Cataluña (cambio del s. XIX al s. XX). El desarrollo de las estructuras de hierro y fundición, en combinación con las tradicionales fábricas de ladrillo, llevaron a la gestación de un nuevo tipo arquitectónico porticado, bidireccional e isostático, del cual Can Bagaria representa uno de los ejemplos más evolucionados, tal como se constata a través del análisis de sus componentes estructurales y del conocimiento de sus precedentes tipológicos y tecnológicos.Ayuntamiento de Cornellà de LlobregatMartín, E.; Cornadó, C.; Díaz, C.; Ravetllat, P.; Vima-Grau, S. (2022). La arquitectura de la industria textil catalana: Can Bagaria y las técnicas constructivas en hierro. Loggia, Arquitectura & Restauración. (35):94-113. https://doi.org/10.4995/loggia.2022.16975941133

Perceptual distortion modeling for side-by-side 3D video delivery

A frame-level distortion model based on perceptual features of the human visual system is proposed to improve the performance of unequal error protection strategies and provide better quality of experience to users in Side-by-Side 3D video delivery systems

ViCoCoS-3D: Videoconferencing common scenes

This paper presents a 3D video dataset containing sequences with typical content from videoconferencing scenarios. The objective of this dataset is to provide freely-available sequences for the research community to support the develop-ment and evaluation of processing techniques applicable to 3D videoconferencing systems. Therefore, a detailed description of the generation process and the content characteristics is provided, together with insights of possible applications of the datase

High Efficiency Power Amplifier Based on Envelope Elimination and Restoration Technique

Due to complex envelope and phase modulation employed in modern transmitters it is necessary to use power amplifiers that have high linearity. Linear power amplifiers (classes A, B and AB) are commonly used, but they suffer from low efficiency especially if the transmitted signal has high peak to average power ratio (PAPR). Kahn's technique based on envelope elimination and restoration (EER) is based on idea that high efficiency power supply (envelope amplifier) could be used to modulate the envelope of high efficient non linear power amplifiers (classes D or E). This paper presents solutions for power amplifier that performs envelope modulation and class E amplifier that is used as a non linear amplifier. The envelope amplifier is implemented as a multilevel converter in series with linear regulator and can provide up to 100 W of instantaneous power and reproduce 2 MHz sine wave. The implemented Class E amplifier can operate at 120 MHz with efficiency near to 85%. The envelope amplifier and class E amplifier have been integrated and efficiency and linearity of the implemented transmitter has been measured and presente

Aprendiendo ética con simulación. Perspectiva de los alumnos sobre el aprendizaje experiencial y reflexivo de la bioética

El modo en que se adquiere la competencia ética en ciencias de la salud es motivo de debate. La simulación clínica podría ser la respuesta a dicha necesidad de formación. El objetivo del estudio fue valorar las opiniones de los alumnos sobre la Simulación clínica como metodología de aprendizaje de bioética en enfermería. Se realizó un estudio cuantitativo después de experimentar 6 escenarios simulados con contenidos éticos en alumnos de 4º de enfermería (n=30). Las variables del estudio fueron: valoración previa del conocimiento ético, aprendizaje, percepción y emociones, satisfacción y preferencia de contenidos. Las situaciones simuladas fueron diseñadas para contener cuestiones éticas. Las encuestas se analizaron con estadísticos descriptivos. Resultados. La perspectiva de los estudiantes acerca de su aprendizaje con simulación fue positiva (puntuaciones altas/muy altas en las diferentes dimensiones medidas en la encuesta). El contenido mejor valorado fue la “actuación ante sospecha de maltrato” y el menos valorado fue “aspectos sobre la cooperación al mal”. Discusión. Las competencias exploradas en este trabajo pueden ser ampliadas para lograr articular un plan de estudios con la simulación clínica como modelo para trabajar aspectos éticos. Las opiniones de los alumnos refuerzan el uso de la simulación para el aprendizaje de la éticaEnfermerí

DNA variation in myoMIRs of the 1, 133, and 208 families in hypertrophic cardiomyopathy

MicroRNAs (miRNAs) are small RNAs that bind to mRNAs and regulate gene expression. MyoMirs are miRNAs implicated in cardiogenesis. Some MyoMirs have been found deregulated in hearts from patients with left ventricular hypertrophy (LVH). DNA variants at these miRNAs could contribute to the risk of developing hypertrophic cardiomyopathy (HCM). To test this hypothesis we used single strand conformation analysis and direct sequencing to search for DNA variants in the mir-208a, miR-208b, miR-133a-1, miR-133a-2, miR-133b, miR-1-1, and miR-1-2 genes in patients with HCM (n=245), LVH secondary to hypertension (n=120), and healthy controls (n=250). We found several nucleotide variants. Genotyping of patients and healthy controls showed significantly associations between a 133a-1 polymorphism and HCM and a 133b polymorphism and hypertensive-LVH. We concluded that rare variants in these mature miRNAs would be rarely found among HCM patients, but miR-133a-1 and 133b polymorphisms could contribute to the risk of developing cardiac hypertrophy.this work was supported by grants from the Spanish Fondo de Investigaciones Sanitarias-Fondos FEDER European Union (FIS-00/0172), and Red de Investigación Renal-REDINREN (RD06/0016). MP a predoctoral fellow from FICYT-Principado de Asturias. MD is the recipient of a Contrato de Apoyo a la Investigación- Fondo de Investigaciones Sanitarias

Modelización Matemática para la predicción de la siniestralidad laboral

El artículo es un intento de avanzar más allá del mero análisis de las estadísticas y, por medio de conocidas técnicas de diseño industrial, desarrollar modelos matemáticos de predicción de la siniestralidad laboral por sectores económicos, que permitan identificar, comparativa y cualitativamente, que factores o variables son los que más contribuyen en los accidentes con baja ayudando a focalizar en estos las medidas preventivasConsejo Colombiano de seguridad2021-2

Effects of Cervico-Mandibular Manual Therapy in Patients with Temporomandibular Pain Disorders and Associated Somatic Tinnitus: A Randomized Clinical Trial.

Objective. This randomized clinical trial investigated the effects of adding cervico-mandibular manual therapies into an exercise and educational program on clinical outcomes in individuals with tinnitus associated with temporomandibular disorders (TMDs). Methods. Sixty-one patients with tinnitus attributed to TMD were randomized into the physiotherapy and manual therapy group or physiotherapy alone group. All patients received six sessions of physiotherapy treatment including cranio-cervical and temporomandibular joint (TMJ) exercises, self-massage, and patient education for a period of one month. Patients allocated to the manual therapy group also received cervicomandibular manual therapies targeting the TMJ and cervical and masticatory muscles. Primary outcomes included TMD pain intensity and tinnitus severity. Secondary outcomes included tinnitus-related handicap (Tinnitus Handicap Inventory [THI]), TMD-related disability (Craniofacial Pain and Disability Inventory [CF-PDI]), self-rated quality of life (12-item Short Form Health Survey [SF-12]), depressive symptoms (Beck Depression Inventory [BDI-II]), pressure pain thresholds (PPTs), and mandibular range of motion. Patients were assessed at baseline, one week, three months, and six months after intervention by a blinded assessor. Results. The adjusted analyses showed better outcomes (all, P < 0.001) in the exercise/education plus manual therapy group (large effect sizes) for TMD pain (g 2 P ¼ 0.153), tinnitus severity (g 2 P ¼ 0.233), THI (g 2 P ¼ 0.501), CF-PDI (g 2 P ¼ 0.395), BDI-II (g 2 P ¼ 0.194), PPTs (0.363< g 2 P < 0.415), and range of motion (g 2 P ¼ 0.350), but similar changes for the SF-12 (P ¼ 0.622, g 2 P ¼ 0.01) as the exercise/education alone group. Conclusions. This clinical trial found that application of cervico-mandibular manual therapies in combination with exercise and education resulted in better outcomes than application of exercise/ education alone in individuals with tinnitus attributed to TMD.post-print543 K