Presencia de la literatura fantástica en el cine de David Lynch

Conferencias y Comunicaciones del primer Congreso Internacional de literatura fantástica y ciencia ficción, celebrado del 6 al 9 de mayo de 2008 en la Universidad Carlos III de Madri

Impuesto a los combustibles líquidos

El presente trabajo es un análisis descriptivo del régimen impositivo del impuesto a los combustibles líquidos en Argentina, actualizado hasta el año 2013.Fil: Arroyo, Jorge Carlos Gustavo. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas.Fil: Ramírez, Francisco Guillermo. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas.Fil: Ruiz, Sebastián Alejandro. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas

EVALUACIÓN DE ESFUERZOS RESIDUALESEN SEMIEJE TUBULAR DE JUNTA HOMOCINETICA POR EL METODO DEL ANILLO DIVIDO (EVALUATION OF RESIDUAL STRESSES IN TUBULAR HALF-SHAFTS OF CONSTANT VELOCITY JOINTS BY THE SPLIT-RING METHOD)

Resumen La presente investigación se determinó los esfuerzos residuales generados en un tubo de pared gruesa sin costura de cual se fabrican los semiejes tubulares de las juntas homocinéticas, por el método del anillo dividido (Split Ring) a una probeta de acero aleado modificado de 36 mm de diámetro exterior. El formado de tubos sin costura se realiza por estirado en frío, generando deformación plástica para conformar el tubo con el diámetro y espesor deseado. La deformación plástica genera deformaciones microestructurales en el material, induciendo esfuerzos residuales en el mismo. La industria automotriz, principalmente la industria de la transmisión registra pérdidas millonarias por deformaciones plásticas o elásticas en sus componentes. El tubo de acero aleado sin costuras es utilizado en la industria de la transmisión como flecha homocinética, la cual transmite la fuerza del motor a la caja de cambios y la convierte en rotación al llegar a las ruedas. El objetivo de determinar el esfuerzo residual en un tubo de pared gruesa con el método del anillo divido es obtener una aplicación accesible y económica en el estudio y análisis de los esfuerzos residuales en la industria. La determinación del esfuerzo residual inducido en el tubo se realizará aplicando el método de la ranura (Split Ring) en base al postulado de Crampton y la norma ASTM 1928-13, comparando ambas metodologías para la obtención del esfuerzo residual. El promedio de los esfuerzos residuales obtenidos mediante la norma ASTM y el postulado de Crampton fue de 11923 y 12917 kPa, respectivamente. En base a los resultados se puede concluir son mayores los esfuerzos residuales que se liberan con la longitud que sugiere Crampton, ubicándose en la parte exterior del tubo, ya que el diámetro exterior sufrió una expansión al realizarse la ranura. Palabras clave: Esfuerzos Residuales, Anillo Dividido, Tubo sin costura, Flecha homocinética. Abstract The present investigation determined the residual stresses generated in a thick-walled seamless tube from which the tubular half-shafts of the homokinetic joints are manufactured, by the Split Ring method on a 36 mm outside diameter chromium, nickel and modified molybdenum alloy steel specimen. Seamless tube forming is performed by cold drawing, generating plastic deformation to form the tube with the desired diameter and thickness. The plastic deformation generates microstructural deformations in the material, inducing residual stresses in it. The automotive industry, mainly the transmission industry, records millionaire losses due to plastic or elastic deformations in its components. The seamless alloy steel tube is used in the transmission industry as a homokinetic shaft, which transmits the force from the engine to the gearbox and converts it into rotation when it reaches the wheels. The objective of determining the residual stress in a thick-walled tube with the split ring method is to obtain an accessible and economical application in the study and analysis of residual stresses in industry. The determination of the residual stress induced in the pipe will be carried out by applying the Split Ring method based on Crampton's postulate and the ASTM 1928-13 standard, comparing both methodologies to obtain the residual stress. The average of the residual stresses obtained using the ASTM standard and Crampton's postulate were 11923 and 12917 kPa, respectively. Based on the results, it can be concluded that the residual stresses that are released with the length suggested by Crampton are higher, being located on the outside of the pipe, since the outer diameter underwent an expansion when the groove was made. Keywords: Residual Stresses, Split Ring, Seamless Tube, Homokinetic Arrow

Artificial Intelligence and Dimensionality Reduction: Tools for Approaching Future Communications

ACKNOWLEDGMENT The authors would like to thank the Fraunhofer-Heinrich- Hertz-Institut for acquiring and sharing the data associated to the rooftop and auditorium communication scenarios, the NextG Channel Model Alliance for creating a space to share public databases of propagation measurements, José Francisco Cortés-Gómez for the graphical support, Carmelo García-García for his help in the measurements acquisition, and Sohrab Vafa, Pablo Padilla and Francisco Luna-Valero for their valuable comments.This article presents a novel application of the t-distributed Stochastic Neighbor Embedding (t-SNE) clustering algorithm to the telecommunication field. t-SNE is a dimensionality reduction algorithm that allows the visualization of large dataset into a 2D plot. We present the applicability of this algorithm in a communication channel dataset formed by several scenarios (anechoic, reverberation, indoor and outdoor), and by using six channel features. Applying this artificial intelligence (AI) technique, we are able to separate different environments into several clusters allowing a clear visualization of the scenarios. Throughout the article, it is proved that t-SNE has the ability to cluster into several subclasses, obtaining internal classifications within the scenarios themselves. t-SNE comparison with different dimensionality reduction techniques (PCA, Isomap) is also provided throughout the paper. Furthermore, post-processing techniques are used to modify communication scenarios, recreating a real communication scenario from measurements acquired in an anechoic chamber. The dimensionality reduction and classification by using t-SNE and Variational AutoEncoders show good performance distinguishing between the recreation and the real communication scenario. The combination of these two techniques opens up the possibility for new scenario recreations for future mobile communications. This work shows the potential of AI as a powerful tool for clustering, classification and generation of new 5G propagation scenarios.Spanish Program of Research, Development, and Innovation under Project RTI2018-102002-A-I00Junta de Andalucía under Project B-TIC-402-UGR18 and Project P18.RT.4830Ministerio de Universidades, Gobierno de España under Predoctoral Grant FPU19/0125

Comportamiento de los usuarios WLAN en el campus UPC de Barcelona

A través del proyecto Education Roaming (eduroam), muchas universidades europeas permiten que sus usuarios puedan desplazarse entre ellas, disponiendo en todo momento de los servicios móviles igual que estuviesen en su propia universidad. La Universitat Politècnica de Catalunya (UPC) participa en este proyecto. Analizando los syslog de los puntos de acceso de la biblioteca principal del Campus Nord, se ha estudiado la actividad de los usuarios en la red WLAN de la UPC durante una semana y se ha extraído información sobre el comportamiento de los usuarios. A pesar de la difusión de dispositivos portátiles ligeros que facilitan su uso entre la gente joven mientras se va desplazando, en general los usuarios no se mueven mucho. No obstante la buena cobertura proporcionada por la infraestructura de red, los usuarios sufren muchos problemas de conectividad. Los resultados de nuestro trabajo pueden resultar útiles para mejorar la calidad de la red inalámbrica y para diseñar nuevas aplicaciones que se adapten a los hábitos de los usuarios.Postprint (published version

Optimization of massive connections in 5G networks for IoT

The expected traffic demands for the coming years requires a major technology development. Indeed, from 2017 to 2022, the global annual traffic growth is estimated to reach 220%. This annual growth leads in turn to an increase in the number of users connected to IP networks, going from 2.4 to 3.6 devices connected per person. Currently, 4G networks are capable of handling this load, but the irruption of the 5G breakthroughs, expected to be at full operation by 2020, is visible. However, 5G technologies may come along with a considerable power consumption if they are not devised properly. As a consequence, a key issue in the developing of these networks is to make them energetically sustainable. In this work, a preliminary study of the optimization of various aspects of the 5G system is presented. It addresses the configuration of the different basic parameters of the system and optimizes the power transmitted by the base stations to obtain simultaneous improvements in system capacity and its power consumption for a massive connections scenario. To the best of our knowledge, this is the very first time this type of 5G scenario is optimized with these two performance criteria.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Home‑based prehabilitation improves physical conditions measured by ergospirometry and 6MWT in colorectal cancer patients: a randomized controlled pilot study

Purpose/background Prehabilitation aims to improve physical condition in the preoperative period and, therefore, decrease the loss of cardiopulmonary capacity postoperatively, with the aim of reducing complications and promoting an early recovery. This study aims to evaluate the impact of home-based prehabilitation on the physical condition of patients treated surgically for colorectal cancer. Methods A prospective and randomized clinical study was conducted on 60 patients during two periods from October 2018 to February 2019 and from September 2019 to September 2020, in a single university hospital. Patients were randomized into two study groups (30 per group): prehabilitation vs. standard care. Changes in physical condition, measured at diagnosis, the day before surgery, and at 6–8 weeks after surgery using the cardiopulmonary exercise testing (CPET) and the 6-minute walk test (6MWT) were evaluated. Results Prehabilitation reduced postoperative complications (17.4% vs. 33.3%, p = 0.22) and hospital stay (5.74 vs. 6.67 days, p = 0.30). 6MWT showed a signifcant improvement in the prehabilitation group (+78.9 m). Six weeks after surgery, prehabilitation showed a signifcant improvement in the 6MWT (+68.9 m vs. −27.2 m, p = 0.01). Signifcant diferences were also observed in the ergospirometry between the diagnosis and postoperative study (+0.79 METs vs. −0.84 METs, p = 0.001). A strong correlation was observed between CPET and 6MWT (0.767 (p < 0.001)). Conclusion Home prehabilitation achieved lower overall postoperative complications than standard care and reached signifcant improvements in 6MWT and CET. A strong correlation was observed between CET and 6MWT, which allows validation of 6MWT as a valid and reliable measure of functional exercise capacity in colorectal patients when other, more specifc and expensive tests are not available

KINETICS OF ANTIBODIES AGAINST PRRSV IN WEANING, FATTENING AND FINISHING PIGS IN A FARM IN LIMA, PERU

El objetivo del presente estudio fue determinar la cinética de anticuerpos contra el virus del Síndrome Reproductivo y Respiratorio Porcino (VPRRS) en 30 animales de un lote de 200 de una granja porcina tecnificada de Lima. Se recolectaron muestras de sangre en tres periodos consecutivos a los 32, 61 y 136 días de edad para la determinación de anticuerpos contra el VPRRS mediante la prueba de ELISA indirecta. Adicionalmente, el lote de los 200 animales, incluidos los 30 animales experimentales, fue observado diariamente durante el tiempo que duró el estudio en busca de problemas respiratorios. El 26.7% (8/30) de las muestras de los lechones a los 32 días de edad tuvieron anticuerpos contra el VPRRS, así como una sola muestra a los 61 días de edad, mientras que el 96.7% (29/30) a los 136 días de edad presentaron anticuerpos contra el VPRRS con valores M/P entre 0.4 a 2.0. Durante el periodo de observación in situ de los animales del lote no se observaron signos respiratorios anómalos. Se encontró asociación significativa (p&lt;0.05) entre la presencia de anticuerpos y la edad de los animales.The objective of the present study was to evaluate the kinetic of antibodies againstthe Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) in 30 of a group of200 pigs in a commercial farm in Lima, Peru. Blood samples were collected at 32, 61 and 135days of age for detecting antibodies against PRRSV by indirect ELISA. In addition, the occurrence of respiratory clinical signs was daily recorded in the total group of 200animals including the 30 animals of the study. The 26.7% (8/30) of pigs had antibodiesagainst PRRSV at 32 days of age and only one at 61 days of age, while 96.7% (29/30) hadantibodies against PRRSV at 136 days of age with S/P values between 0.4 and 2.0. Nonrespiratory problems were recorded. The presence of antibodies and age of animals wasstatistically associated (p&lt;0.05)

Lengua española para magisterio

Departament de Filologia i Cultures Europees. Codi assignatura: MI1802, MP180

Long non-coding RNA signatures in the Ileum and Colon of Crohn’s disease patients and effect of Anti-TNF-α treatment on their modulation

Biological therapies only benefit one-third of patients with Crohn’s disease (CD). For this reason, a deeper understanding of the mechanisms by which biologics elicit their effect on intestinal mucosa is needed. Increasing evidence points toward the involvement of long noncoding RNAs (lncRNAs) in the pathogenesis of CD, although their role remains poorly studied. We aimed to characterize lncRNA profiles in the ileum and colon from CD patients and evaluate the effect of anti-TNF-α treatment on their transcription. Terminal ileum and left colon samples from 30 patients (active CD = 10, quiescent CD = 10, and healthy controls (HCs) = 10) were collected for RNA-seq. The patients were classified according to endoscopic activity. Furthermore, biopsies were cultured with infliximab, and their transcriptome was determined by Illumina gene expression array. A total of 678 differentially expressed lncRNAs between the terminal ileum and left colon were identified in HCs, 438 in patients with quiescent CD, and 468 in patients with active CD. Additionally, we identified three new lncRNAs in the ileum associated with CD activity. No differences were observed when comparing the effect of infliximab according to intestinal location, presence of disease (CD vs. HC), and activity (active vs. quiescent). The expression profiles of lncRNAs are associated with the location of intestinal tissue, being very different in the ileum and colon. The presence of CD and disease activity are associated with the differential expression of lncRNAs. No modulatory effect of infliximab has been observed in the lncRNA transcriptom