Low Complexity Time Synchronization Algorithm for OFDM Systems with Repetitive Preambles

In this paper, a new time synchronization algorithm for OFDM systems with repetitive preamble is proposed. This algorithm makes use of coarse and fine time estimation; the fine time estimation is performed using a cross-correlation similar to previous proposals in the literature, whereas the coarse time estimation is made using a new metric and an iterative search of the last sample of the repetitive preamble. A complete analysis of the new metric is included, as well as a wide performance comparison, for multipath channel and carrier frequency offset, with the main time synchronization algorithms found in the literature. Finally, the complexity of the VLSI implementation of this proposal is discussed. © 2011 Springer Science+Business Media, LLC.This work was supported by the Spanish Ministerio de Educacion y Ciencia under grants TEC2006-14204-C02-01 and TEC2008-06787.Canet Subiela, MJ.; Almenar Terre, V.; Flores Asenjo, SJ.; Valls Coquillat, J. (2012). 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DVD Fuentes de energía. Aspectos técnicos, medioambientales y legislativos

En este artículo se describe básicamente la planificación, metodología, ejecución, así como los resultados obtenidos en la elaboración del DVD sobre fuentes de energía convencionales y alternativas. El proyecto ha sido dirigido y coordinado por el profesor Ramón Mª Mujal (ETSEIT Terrassa), y en el cual han colaborado un grupo de profesores de los departamentos de ingeniería eléctrica, ingeniería mecánica e ingeniería química de la Escuela Técnica Superior de Ingeniería Industrial de Terrassa (UPC). Para llevar a cabo el mismo, se ha contado con la valiosa ayuda de alumnos becados y técnicos en multimedia de la misma universidad pertenecientes al servicio de multimedia “La Factoría” de la Biblioteca del Campus de Terrassa. En principio, el DVD pretende ser un entorno virtual de aprendizaje para los alumnos de carreras semipresenciales, que no disponen de tantas horas de clase teóricas como los alumnos presenciales, aunque es ampliable a otro tipo de usuarios y niveles docentes

Metabolome and proteome changes in skeletal muscle and blood of pre-weaning calves fed leucine and threonine supplemented diets

In pre-weaning calves, both leucine and threonine play important roles in growth and muscle metabolism. In this study, metabolomics, proteomics and clinical chemistry were used to assess the effects of leucine and threonine supplementation added to milk replacer on 14 newborn Holstein male calves: 7 were fed a control diet (Ctrl) and 7 were fed the Ctrl diet supplemented with 0.3% leucine and 0.3% threonine (LT) from 5.6 days of age to 53.6 days. At this time, blood and semitendinosus muscle biopsies were collected for analysis. Integrated metabolomics and proteomics showed that branched-chain amino acids (BCAA) degradation and mitochondrial oxidative metabolism (citrate cycle and respiratory chain) were the main activated pathways in muscle because of the supplementation. BCAA derivatives and metabolites related to lipid mobilization showed the major changes. The deleterious effects of activated oxidative phosphorylation were balanced by the upregulation of antioxidant proteins. An increase in protein synthesis was indicated by elevated aminoacyl-tRNA biosynthesis and increased S6 ribosomal protein phosphorylation in skeletal muscle. In conclusion, LT group showed greater BCAA availability and mitochondrial oxidative activity; as the muscle cells undergo greater aerobic metabolism, antioxidant defenses were activated to compensate for possible cell damage. Data are available via ProteomeXchange (PXD016098)info:eu-repo/semantics/acceptedVersio

Skeletal muscle metabolomics and blood biochemistry analysis reveal metabolic changes associated with dietary amino acid supplementation in dairy calves

The effects of different amino acid (AA) supplementations of milk protein-based milk replacers in pre-ruminant calves from 3 days to 7 weeks of age were studied. Animals were divided into 4 groups: Ctrl) Control group fed with milk protein-based milk replacer without supplementation; GP) supplementation with 0.1% glycine and 0.3% proline; FY) supplementation with 0.2% phenylalanine and 0.2% tyrosine; MKT) supplementation with 0.62% lysine, 0.22% methionine and 0.61% threonine. For statistical analysis, t-test was used to compare AA-supplemented animals to the Ctrl group. At week 7, body weight and average daily gain (ADG) were measured and blood samples and skeletal muscle biopsies were taken. Blood biochemistry analytes related to energy metabolism were determined and it was shown that MKT group had higher serum creatinine and higher plasma concentration of three supplemented AAs as well as arginine compared with the Ctrl group. GP group had similar glycine/proline plasma concentration compared with the other groups while in FY group only plasma phenylalanine concentration was higher compared with Control. Although the AA supplementations in the GP and FY groups did not affect average daily gain and metabolic health profile from serum, the metabolome analysis from skeletal muscle biopsy revealed several differences between the GP-FY groups and the Ctrl-MKT groups, suggesting a metabolic adaptation especially in GP and FY groupsinfo:eu-repo/semantics/publishedVersio

Competencia trabajo en equipo (CTE): modelo GIOTEI. Una representación gráfica

El Grupo de Innovación Docente Consolidado (GIDC) GIOTEI (Grup Infermeria Orientat a Tècniques Educatives Innovadores) trabaja en una línea sobre la CTE (competencia trabajo en equipo) (tercer proyecto PMID2014PID-UB/053). Se pretende implementar un cuestionario de evaluación de la CTE elaborado anteriormente y vincularlo al desarrollo de una rúbrica, adecuándola a los cuatro cursos del Grado de Enfermería

Competencia trabajo en equipo (CTE): modelo GIOTEI una representación gráfica (Comunicación)

Podeu consultar la Vuitena trobada de professorat de Ciències de la Salut completa a: http://hdl.handle.net/2445/66524El Grupo de Innovación Docente Consolidado (GIDC) GIOTEI (Grup Infermeria Orientat a Tècniques Educatives Innovadores) trabaja en una línea sobre la CTE (competencia trabajo en equipo) (tercer proyecto PMID2014PID-UB/053). Se pretende implementar un cuestionario de evaluación de la CTE elaborado anteriormente y vincularlo al desarrollo de una rúbrica, adecuándola a los cuatro cursos del Grado de Enfermería. El trabajo en equipo se investiga desde los años setenta, sin embargo, las investigaciones sobre la CTE son mucho más recientes y escasas sus publicaciones. Ello dificulta la identificación de un modelo teórico afín a las dimensiones de dicha competencia propuestas por nuestro grupo. La consideración de la multidimensionalidad y la perspectiva sistémica del trabajo en equipo parecen ofrecer pocas dudas. Sin embargo, no hay acuerdo en la conceptualización de las dimensiones que configuran la CTE. Además, las divergencias terminológicas empleadas en la categorización de contenidos (uso indiferenciado de categorías, funciones, capacidades) dificultan identificar su especificidad. Por ello se escoge el modelo híbrido de representación jerárquica (Rousseau et al. 2006) al que ajustamos nuestra propuesta a partir de las categorías: 1) Comportamientos del trabajo en equipo: 1a) Regulación de la actuación del equipo 1b) Gestión del mantenimiento del equipo. En estas dos clasificaciones se integran las dimensiones que componen nuestro modelo: 1) Planificación de tareas 2) Gestión del tiempo 3) Colaboración 4) Comunicación 5