Arquitectura de software para la aplicación de técnicas de reconocimiento facial a través de dispositivos IoT.

Trabajo de investigación"El reconocimiento facial cada vez se vuelve más importante debido a su amplia gama de aplicaciones, pero sigue siendo un reto cuando se enfrentan a grandes variaciones en las características de los datos biométricos y sobre todo cuando se trata de transportar información a través de la red de internet en el ámbito del internet de las cosas. Este trabajo de grado tiene como objetivo caracterizar los modelos de seguridad referentes al tratamiento de datos biométricos faciales, con la finalidad de proponer una arquitectura de software que contenga requerimientos de seguridad básicos necesarios, para el tratamiento de los datos involucrados en la aplicación de técnicas de reconocimiento facial, orientada a un entorno IoT."1. GENERALIDADES 2. OBGETIVOS 3. DELIMITACIONES 4. CRONOGRAMA 5. INSTRUMENTOS O HERRAMIENTAS UTIILZADAS 6. PRESUPUESTO 7. MARCOS DE REFERENCIA 8. METODOLOGIA 9. PRODUCTOS A ENTREGAR 10. DESARROLLO 11. TRABAJOS FUTUROS 12. CONCLUSIONES BIBLIOGRAFIA ANEXOS INTRODUCCIÓNEspecializaciónEspecialista en Seguridad de la Informació

El marketing sensorial: una aproximación al mundo del retail español

El objetivo de este artículo es conocer la percepción de los decisores de los centros comerciales españoles sobre la aplicación de acciones de marketing sensorial y experiencial. Mediante una encuesta personal realizada en septiembre de 2014 a 171 profesionales del sector, el análisis empírico realizado sirve para responder a las siguientes preguntas ¿Qué grado de conocimiento tienen los gestores sobre el marketing sensorial? ¿Qué acciones se están utilizando en este ámbito con mayor frecuencia? ¿Se están midiendo sus efectos? ¿Con qué herramientas? ¿Qué impacto tienen sobre los resultados del negocio según los decisores? Entre los principales resultados obtenidos destaca el notable grado de conocimiento del concepto de marketing sensorial, si bien hay diferencias en cuanto a las acciones implantadas por tipo de empresa. Asimismo, los decisores valoran notablemente su impacto en los resultados. En definitiva, consideran que la inversión en marketing sensorial resulta rentable y eficaz.Plan Nacional de I+D+i ECO2012-31 51

Predictors of early reading acquisition in children of low socioeconomic status

El presente estudio tuvo por objetivo identificar los predictores de la lectura inicial en niños monolingües de un lenguaje transparente. Ochenta estudiantes que cursaban los grados de transición (M = 5 años, DE = 0.40), primero (M = 6 años, DE = 0.59) y segundo de primaria (M = 7 años, DE = 0.55) en una institución pública, participaron en el estudio. Todos fueron evaluados con la prueba Early Grade Reading Acquisition, un cuestionario sociodemográfico ad hoc y el dominio de Lenguaje de la batería Evaluación Neuropsicológica Infantil. Los análisis de regresión múltiple mostraron que la conciencia fonológica y el grado de escolaridad son los factores que explican el desempeño lector de niños de los primeros grados escolares. Estos hallazgos destacan la importancia de promover habilidades orales previas a la adquisición de la lectura inicial, para mejorar el aprendizaje lector de niños monolingües, con limitadas oportunidades socio-económicas.O presente estudo teve como objetivo identificar os preditores da leitura inicial de uma linguagem transparente em crianças monolíngues. Oitenta alunos pertencentes à educação infantil N3 (M = 5 anos, DE = 0.40), 1ª série (M = 6 anos, DE = 0.59) e 2ª série (M = 7 anos, DE = 0.55) do ensino fundamental participaram do estudo. As crianças foram avaliadas por meio do teste Early Grade Reading Acquisition, por um questionário sociodemográfico ad hoc e apenas pelo Domínio da Linguagem do teste Evaluación Neuropsicológica Infantil. A análise de regressão múltipla mostrou que a consciência fonológica e o nível de escolaridade são os fatores que explicam o desempenho na leitura em crianças nas primeiras séries. Os resultados deste estudo sugerem a importância de promover habilidades orais antes da aquisição da leitura inicial, para melhorar o aprendizado da leitura de crianças monolíngues com limitadas oportunidades socioeconômicas.The aim of the present study was to identify the predictors of early-grade reading acquisition in monolingual speakers of a transparent language. Eighty students attending preschool (M = 5 years, SD = 0.40), first grade (M = 6 years, SD = 0.59) and second grade (M = 7 years, SD = 0.55) in a public institution participated in the study. All were evaluated with the Early Grade Reading Acquisition test, an ad hoc sociodemographic questionnaire and the language domain of the Child Neuropsychological Assessment battery. Multiple regression analysis showed that phonological awareness and years of education are the factors that explain reading performance of children in their early years of school. These findings highlight the importance of improving oral skills prior to early reading acquisition and contribute to enhancing the early reading skills of monolingual children with limited socioeconomic opportunities

Evaluación de sistemas de tratamiento en lixiviados provenientes de un relleno sanitario maduro: caso relleno sanitario Curva de Rodas

RESUMEN: Los lixiviados producidos en el relleno sanitario clausurado Curva de Rodas de la ciudad de Medellín se catalogan como “lixiviados maduros”, estos se caracterizan por ser un residuo poco biodegradable. En este trabajo se evalúa la eficiencia de cinco posibles tratamientos fisicoquímicos: adsorción con 5 tipos de carbón activado granular (CAG), adsorción con Zeolita tipo A, oxidación Fenton, precipitación química con Ca(OH)2 y coagulaciónfloculación con Sulfato de Aluminio Tipo A. Mediante la adsorción con CAG se alcanzaron remociones de hasta 39% para DQO y 50% para Color. En el caso de adsorción con Zeolita tipo A se lograron remociones de hasta 3% en DQO y 7% en Color. En los ensayos de precipitación química se lograron remociones máximas de 16% en DQO y 50% en color y por el proceso de coagulación-floculación hasta del 27% en DQO y del 63% en color. Los mejores resultados se obtuvieron con el proceso de oxidación Fenton, neutralizando con NaOH se lograron remociones máximas de 95% en DQO y 97% en color. Al neutralizar con lixiviado sin tratar las remociones alcanzadas fueron de hasta 79% en DQO y 87% en color.ABSTRACT: Leachates produced in the closed landfill Curva de Rodas in Medellin, Colombia are catalogued as mature leachates. These are characterized as poorly biodegradable waste containing organic compounds such as fulvic and humic acids, heavy metals, ammonia, nitrogen, and salts. In this paper five possible physicochemical leachate treatments are evaluated: adsorption with five types of granular activated carbon (GAC), adsorption with zeolite type A, Fenton oxidation, chemical precipitation by Ca(OH)2, and coagulationflocculation with aluminum sulfide type A. The treatments are compared in terms of their capacity to remove Chemical Oxygen Demand (COD) and color. GAC adsorption removals of up to 39% for COD and 50% for color were achieved. In the case of the adsorption with zeolite type A, negligible removals of COD and color were achieved (3% and 7% respectively). Removals using the Fenton oxidation and neutralization with NaOH reached up to 95% for COD and 97% for color. When additionally neutralized with raw leachate the removals were up to 79% for COD and 87% for color. Finally in the chemical precipitation tests, removals of 27% for COD and 63% for color were achieved. Clearly, Fenton oxidation was identified as the most appropriate treatment process

Caracterización Antropométrica, Maduración Y Alimentación En El Futbolista Colombiano Sub15

Introduction: Nutrition is a determinant factor of performance in high competitive sports; specifically in youth soccer, the development of superior technical qualities is required to face the physical demands of professional soccer. Several investigations have been carried out that have evaluated anthropometry, body composition, and nutritional intake; however, at a national level, publications in the Colombian population that allow the of anthropometric characteristics related to maturation in adolescent soccer players are scarce. Therefore, the objective of this project was to describe and compare the nutritional-anthropometric status, dietary intake and maturation parameters in Colombian soccer players belonging to the U-15 category. Methods: Anthropometric measurements were taken and a nutritional survey was conducted on 44 U-15 players of the Envigado Fútbol Club in Envigado, Antioquia. Anthropometric parameters were measured according to the standard protocols followed by the ISAK manual. Results: Differences were found in the variables weight, height, wingspan, sitting height, and muscle mass in early maturers with respect to average and late maturers, with early maturers having higher values. Goalkeepers presented greater differences in body weight and adipose mass as opposed to the other playing positions, which could be associated with lower energy expenditure. The average nutritional status indicators of Z BMI-Age and Z Height-Age were adequate, however, the early maturers, on average, were classified as very high for their age (Z Height-Age > 2.0) and only one case classified with risk of height-for-age delay is who presented a late maturation. The average energy intake was 1200 and 1700 kcal ± 400 kcal.  Conclusions: Athletes have an adequate nutritional-anthropometric status, a lower energy intake distributed mostly in lipids and carbohydrates and lower in protein than the recommendations for these adolescent athletes.Introducción: La nutrición es un factor determinante del rendimiento en el deporte de alta competición; específicamente en el fútbol juvenil se requiere el desarrollo de cualidades técnicas superiores para enfrentar las exigencias físicas del fútbol profesional. Se han llevado a cabo varias investigaciones que han evaluado la antropometría, composición corporal e ingesta nutricional, sin embargo, a nivel nacional las publicaciones en población colombiana que permitan identificar características antropométricas relacionadas con la maduración en jugadores adolescentes de fútbol son escasas. Por lo tanto, el objetivo de este proyecto fue describir y comparar el estado nutricional-antropométrico, la ingesta alimentaria y los parámetros de maduración en el jugador de fútbol colombiano perteneciente a la categoría sub-15. Método: Se tomaron medidas antropométricas y se realizó una encuesta nutricional en 44 jugadores sub-15 del Envigado Fútbol Club en Envigado, Antioquia. Los parámetros antropométricos se midieron de acuerdo con los protocolos estándar seguidos por el manual ISAK. Resultados: Se encontraron diferencias en las variables peso, talla, envergadura, talla sentada y masa muscular en los maduradores tempranos con respecto a los maduradores promedio y tardío, siendo los maduradores tempranos los que tenían valores más altos. Los porteros presentaron mayores diferencias en el peso corporal y masa adiposa a diferencia de las demás posiciones de juego, la cual podría asociarse al menor gasto energético. Los indicadores de estado nutricional promedio del Z IMC - Edad y Z Talla- Edad fueron adecuados, sin embargo, los maduradores tempranos, en promedio fueron clasificados como muy altos para su edad (Z Talla-Edad > 2,0) y solo un caso clasificado con riesgo de retraso en talla para la edad es quien presentó una maduración tardía. La ingesta energética promedio fue de 1200 y 1700 kcal ± 400 kcal. Conclusiones: Los deportistas tienen un estado nutricional-antropométrico adecuado, una ingesta energética inferior distribuida mayoritariamente en lípidos e hidratos de carbono e inferior en proteínas a las recomendaciones para estos adolescentes deportistas

A novel low-pass filter based on dielectric impedance inverters to enhance the multipactor breakdown threshold

This work presents a novel low-pass filter based on using dielectric materials, in the critical areas of the structure, to prevent high-power space condition adverse effects, like multipactor breakdown. It is shown that the use of dielectric pieces in the inverters of the filter leads to increased gaps between metallic parts in the irises. In addition, by completely filling up the air space in critical gaps, the multipactor breakdown thresholds can be increased. Moreover, they also lead to a volume reduction, increasing compactness of the structure. To demonstrate the proposed concept, a prototype has been manufactured with an aluminum housing and a Teflon dielectric material, and tested for multipactor effect at ESA-VSC Laboratory. Tests confirmed that the manufactured filter has good electrical performance with cut-off frequency 13.6 GHz, insertion losses 0.32 dB, return losses better than 15 dB, and additionally does not show multipactor breakdown up to the maximum power tested in the experimental facility (5.5 kW).This research work has been financially supported by the Spanish Ministerio de Ciencia e Innovación in the frame of the project “Green an Efficient Technologies for Advanced Telecommunication Systems (GRETAS)” with Ref. TPID2019-103982RB-C42

The mRNA degradation factor Xrn1 regulates transcription elongation in parallel to Ccr4

Co-transcriptional imprinting of mRNA by Rpb4 and Rpb7 subunits of RNA polymerase II (RNAPII) and by the Ccr4–Not complex conditions its posttranscriptional fate. In turn, mRNA degradation factors like Xrn1 are able to influence RNAPII-dependent transcription, making a feedback loop that contributes to mRNA homeostasis. In this work, we have used repressible yeast GAL genes to perform accurate measurements of transcription and mRNA degradation in a set of mutants. This genetic analysis uncovered a link from mRNA decay to transcription elongation. We combined this experimental approach with computational multi-agent modelling and tested different possibilities of Xrn1 and Ccr4 action in gene transcription. This double strategy brought us to conclude that both Xrn1-decaysome and Ccr4–Not regulate RNAPII elongation, and that they do it in parallel. We validated this conclusion measuring TFIIS genome-wide recruitment to elongating RNAPII. We found that xrn1Δ and ccr4Δ exhibited very different patterns of TFIIS versus RNAPII occupancy, which confirmed their distinct role in controlling transcription elongation. We also found that the relative influence of Xrn1 and Ccr4 is different in the genes encoding ribosomal proteins as compared to the rest of the genome

TFIIS is required for the balanced expression of the genes encoding ribosomal components under transcriptional stress

Transcription factor IIS (TFIIS) stimulates RNA cleavage by RNA polymerase II by allowing backtracked enzymes to resume transcription elongation. Yeast cells do not require TFIIS for viability, unless they suffer severe transcriptional stress due to NTP-depleting drugs like 6-azauracil or mycophenolic acid. In order to broaden our knowledge on the role of TFIIS under transcriptional stress, we carried out a genetic screening for suppressors of TFIIS-lacking cells’ sensitivity to 6-azauracil and mycophenolic acid. Five suppressors were identified, four of which were related to the transcriptional regulation of those genes encoding ribosomal components [rRNAs and ribosomal proteins (RP)], including global regulator SFP1. This led us to discover that RNA polymerase II is hypersensitive to the absence of TFIIS under NTP scarcity conditions when transcribing RP genes. The absence of Sfp1 led to a profound alteration of the transcriptional response to NTP-depletion, thus allowing the expression of RP genes to resist these stressful conditions in the absence of TFIIS. We discuss the effect of transcriptional stress on ribosome biogenesis and propose that TFIIS contributes to prevent a transcriptional imbalance between rDNA and RP genes.España Ministerio de Economía y competitividad BFU2007-67575-C03-02España Ministerio de Economía y competitividad BFU-2010-21975-C03-03Andalucía, Junta de Andalucía P07-CVI-02623Andalucía, Junta de Andalucía P08-CVI-035

Laparoscopic cholecystectomy and common bile duct exploration using choledochotomy and primary closure following failed endoscopic retrograde cholangiopancreatography: A multicentric comparative study using three-port vs multiport

Background: Laparoscopic surgery has changed many ways in which we as surgeons manage patients, offering better results, quicker recovery, and fewer complications using minimally invasive techniques, especially in common bile duct (CBD) surgery. Not only can laparoscopic techniques be applied to programed surgery but also emergencies and those following failed endoscopic retrograde cholangiopancreatography (ERCP). Objectives and aims: Describe and compare clinical and surgical results of the laparoscopic CBD exploration with primary closure using a 3-port vs multiport approach. Materials and methods: We present a multicentric comparative study of 197 consecutive patients who underwent a laparoscopic gallbladder removal along with CBD exploration with primary closure following failed (ERCP to extract CBD stones; 104 patients were managed by three-port vs 93 multiport laparoscopic surgery in five centers of Bogotá, Colombia, between 2013 and 2017 with follow-up of 1 year. Results: A total of 197 patients were taken to laparoscopic gallbladder removal along with CBD exploration with primary closure, 104 patients via three-port technique and 93 patients via multiport. All (100%) the patients had previously failed ERCP. The average surgical time on the three-port approach was 106 minutes vs 123 minutes on multiport. Only in the multiport technique we had an average conversion of 2%. Mean hospital stay of 2.5 days, less for the three-port approach vs multiport in 5–7 days. There was a need of reintervention in 1% of the patients who underwent three-port exploration. Conclusion: Postoperative pain, use of an additional port, complication rates, operation time, and cost of the three-port technique were similar to those of the conventional approach. Large randomized controlled trials are needed to examine the true benefits of the three-port technique

Amyloid-β impairs the phagocytosis of dystrophic synapses by astrocytes in Alzheimer's disease

Reactive astrocytes and dystrophic neurites, most aberrant presynaptic elements, are found surrounding amyloid-β plaques in Alzheimer's disease (AD). We have previously shown that reactive astrocytes enwrap, phagocytose, and degrade dystrophic synapses in the hippocampus of APP mice and AD patients, but affecting less than 7% of dystrophic neurites, suggesting reduced phagocytic capacity of astrocytes in AD. Here, we aimed to gain insight into the underlying mechanisms by analyzing the capacity of primary astrocyte cultures to phagocytose and degrade isolated synapses (synaptoneurosomes, SNs) from APP (containing dystrophic synapses and amyloid-β peptides), Tau (containing AT8- and AT100-positive phosphorylated Tau) and WT (controls) mice. We found highly reduced phagocytic and degradative capacity of SNs-APP, but not AT8/AT100-positive SNs-Tau, as compared with SNs-WT. The reduced astrocyte phagocytic capacity was verified in hippocampus from 12-month-old APP mice, since only 1.60 ± 3.81% of peri-plaque astrocytes presented phagocytic structures. This low phagocytic capacity did not depend on microglia-mediated astrocyte reactivity, because removal of microglia from the primary astrocyte cultures abrogated the expression of microglia-dependent genes in astrocytes, but did not affect the phagocytic impairment induced by oligomeric amyloid-β alone. Taken together, our data suggest that amyloid-β, but not hyperphosphorylated Tau, directly impairs the capacity of astrocytes to clear the pathological accumulation of oligomeric amyloid-β, as well as of peri-plaque dystrophic synapses containing amyloid-β, perhaps by reducing the expression of phagocytosis receptors such as Mertk and Megf10, thus increasing neuronal damage in AD. Therefore, the potentiation or recovery of astrocytic phagocytosis may be a novel therapeutic avenue in AD.Centro de Invesitgacion Biomedica en Red Enfermedades Neurodegenetativas (CIBERNED). CB06/05/0094 y CB06/05/1116Instituto de Salud Carlos III y fondos FEDER de la Unión Europea. PI18/01556 y PI18/01557Consejería de Economía y Conocimiento de la Junta de Andalucía y el Programa Operativo FEDER 2014-2020. PY18-RT-2233, UMA18-FEDERJA-211 y US-1262734Fundación La Marató-TV3. 20141430, 20141431, 2014143