Los videojuegos en el aula

Nuestro tema de estudio, los videojuegos, es ciertamente uno de los grandes desconocidos dentro de la psicología infantil y educativa. No existe una teoría especifica para los videojuegos. Sin embargo, podemos utilizar diversas teorías para analizarlos. La elección de éstas dependerá de nuestro objetivo de investigación. En nuestro caso elegimos las teorías de la psicología social y afectiva, que se interesan por los sentimientos y las percepciones de las personas, por cómo ven ellos su propia actuación y cómo se relacionan con los demás

Extending the VEF traces framework to model data center network workloads

Producción CientíficaData centers are a fundamental infrastructure in the Big-Data era, where applications and services demand a high amount of data and minimum response times. The interconnection network is an essential subsystem in the data center, as it must guarantee high communication bandwidth and low latency to the communication operations of applications, otherwise becoming the system bottleneck. Simulation is widely used to model the network functionality and to evaluate its performance under specific workloads. Apart from the network modeling, it is essential to characterize the end-nodes communication pattern, which will help identify bottlenecks and flaws in the network architecture. In previous works, we proposed the VEF traces framework: a set of tools to capture communication traffic of MPI-based applications and generate traffic traces used to feed network simulator tools. In this paper, we extend the VEF traces framework with new communication workloads such as deep-learning training applications and online data-intensive workloads.Ministerio de Ciencia e Innovación y Agencia Estatal de Investigación (MCIN/AEI/10.13039/501100011033) R &D Project Grant (PID2019-109001RA-I00)Publicación en abierto financiada por el Consorcio de Bibliotecas Universitarias de Castilla y León (BUCLE), con cargo al Programa Operativo 2014ES16RFOP009 FEDER 2014-2020 DE CASTILLA Y LEÓN, Actuación:20007-CL - Apoyo Consorcio BUCL

Diseño para una Empresa Familiar de un Sistema Acuapónico con Energía Solar en el Chad

This article describes the design of a single-family aquaponic system powered by solar energy. This technique called “aquaponics” is an activity that blends aquaculture (farming aquatic species) and hydroponics (growing plants in a water-based environment) into one integrated system. A description is given of the elements in the aquaponic circuit, which is sized to scale for a family business, in addition to the budget required for its implementation in Chad. The use of renewable energy offers the possibility of implementing sustainable farming in underdeveloped countries. The objective of this system is to maximize the production of fish and vegetables, taking into account their limitations (20 kg of fish can be produced for every 1,000 liters of water while 8 liters of water are necessary to grow each plant). The fish farmed in this case will be tilapia, as it is technically feasible and has a flavor that is acceptable to the inhabitants of Chad. The cultivated plants include all types of fruits and vegetables, as well as aromatic plants.Este artículo describe el diseño de un sistema acuapónico unifamiliar alimentado con energía solar. Esta técnica llamada “acuaponía”, es una actividad en la que convergen la acuicultura (cría de especies acuáticas) y la hidroponía (cultivo de plantas sobre el agua) en un mismo sistema integrado. Se hace una descripción de los elementos del circuito acuapónico, un dimensionamiento a nivel de empresa familiar así como el presupuesto que permita su implementación en el Chad. Al incluir el uso de energías renovables, nos da la posibilidad de implementar el cultivo sostenible en países subdesarrollados. El objetivo de esta instalación es maximizar la producción de pescados y vegetales, teniendo en cuenta sus limitaciones (se pueden producir 20 kg de peces por cada 1000 litros de agua y son necesarios 8 litros por planta cultivada). El pescado que se criará será la tilapia, ya que técnicamente es factible y su sabor es aceptado por los habitantes del Chad. En cuando al cultivo de plantas, serán todo tipo de frutas y verduras, así como plantas aromáticas

La lengua es mía, pero no solo mía: discursividades sobre las políticas lingüísticas expuestas en el VIII Congreso Internacional de la Lengua Española

Trabajo Final para optar al grado académico de Licenciatura en Comunicación Social, Universidad Nacional de Córdoba (inédita)El propósito de esta tesis es analizar las ideologías lingüísticas en torno al castellano expuestas en las discursividades del VIII Congreso Internacional de la Lengua Española. Desde el enfoque epistemológico de la glotopolítica profundizamos sobre el poder simbólico que se discurre en el espacio y los debates sucedidos acerca de la política lingüística panhispánica, la lengua legítima y el rol de las instituciones normativas. El evento, realizado en la ciudad de Córdoba, Argentina, del 27 al 30 de marzo del año 2019 fue organizado por la Real Academia Española, el Instituto Cervantes y la Asociación de Academias de la Lengua Española en conjunto con la Facultad de Lenguas de la Universidad Nacional de Córdoba y contó con el apoyo del gobierno provincial y nacional de la República Argentina. Allí, casi doscientos cincuenta ponentes debatieron sobre el presente y el futuro de nuestro idioma abordando temáticas como educación, cultura, tecnología y emprendimiento. A partir del interrogante “qué ideologías lingüísticas entran en juego en los discursos de los expositores del VIII Congreso Internacional de la Lengua Española respecto a la política lingüística expuesta en el espacio y cómo se configura la lucha por el poder simbólico de la lengua castellana” desarrollamos cuatro ejes, utilizando como sustento material los discursos emitidos en el acontecimiento: 1. La lengua viva como creencia compartida y punto de origen para los expositores presentes. 2. La lengua como práctica institucional, el rol de los distintos actores participantes y los rituales llevados a cabo en el espacio. 3. La lengua como arma de dominación, recuperando el carácter histórico y colonial de su imposición y enfatizando en su poder simbólico. 4. La lengua como bien de consumo, destacando los usufructos de la industria cultural, su inequidad de distribución y la monopolización del mercado lingüístico.Fil: Iglesias Sánchez, Agostina Belén. Universidad Nacional de Córdoba; Facultad de Ciencias de la Comunicación; Argentina.Fil: Rocha de la Rosa, Leandro Francisco. Universidad Nacional de Córdoba; Facultad de Ciencias de la Comunicación; Argentina

Long-term impact of deficit irrigation on the physical quality of berries in ‘Crimson Seedless’ table grapes

A 3-year study examined the effects of DI strategies on some physical quality attributes of ‘Crimson Seedless’ table grape following harvest, after 28 days of cold storage at 0ºC and after an additional shelf life period of 3 d at 15ºC. Control vines were irrigated to ensure non-limiting water conditions (110% of crop evapotranspiration, ETc), whereas RDI and PRD treatments received 35% less water during post-veraison. The null irrigation treatment (NI) only received natural precipitation (72 % less water than the Control). Total yield and physical quality at harvest were not significantly affected by RDI or PRD. Only the NI treatment, with the worst sensory scores, decreased berry size. After cold storage, increased berry shattering within the PRD treatment was correlated with the lower ABA at the time of harvest. Neither RDI nor PRD had a significant effect on berry quality at the end of cold storage and retail period. Sensory results were similar in RDI and PRD, both providing grapes more acceptable to consumers than the control. Thus, it is possible to decrease irrigation amount by ~30 % of table grapes without adversely affecting berry physical quality.This work was supported by the projects (AGL2010-19201-C04-04) and (FP7-KBBE-2009-3-245159). M.R. Conesa acknowledges her FPU fellowship of the MICINN

A proof-of-concept clinical trial using mesenchymal stem cells for the treatment of corneal epithelial stem cell deficiency

Producción CientíficaOcular stem cell transplantation derived from either autologous or allogeneic donor corneoscleral junction is a functional cell therapy to manage extensive and/or severe limbal stem cell deficiencies that lead to corneal epithelial failure. Mesenchymal stem cells have been properly tested in animal models of this ophthalmic pathology, but never in human eyes despite their potential advantages. We conducted a 6- to 12-month proof-of-concept, randomized, and double-masked pilot trial to test whether allogeneic bone marrow-derived mesenchymal stem cell transplantation (MSCT], n = 17) was as safe and as equally efficient as allogeneic cultivated limbal epithelial transplantation (CLET), (n = 11) to improve corneal epithelial damage due to limbal stem cell deficiency. Primary endpoints demanded combination of symptoms, signs, and the objective improvement of the epithelial phenotype in central cornea by in vivo confocal microscopy. This proof-of-concept trial showed that MSCT was as safe and efficacious as CLET. Global success at 6–12 months was 72.7%–77.8% for CLET cases and 76.5%–85.7% for MSCT cases (not significant differences). Central corneal epithelial phenotype improved in 71.4% and 66.7% of MSCT and CLET cases, respectively at 12 months (P = 1.000). There were no adverse events related to cell products. This trial suggests first evidence that MSCT facilitated improvement of a diseased corneal epithelium due to lack of its stem cells as efficiently as CLET. Consequently, not only CLET but also MSCT deserves more preclinical investigational resources before the favorable results of this proof-of-concept trial could be transformed into the larger numbers of the multicenter trials that would provide stronger evidence. (ClinicalTrials.gov number, NCT01562002.)Ministerio de Sanidad, Consumo y Bienestar Social (project SAS/2481/2009)Centro en Red de Medicina Regenerativa y Terapia Celular de Castilla y León (grant SAN 1178/200)Red de Terapia Celular TerCel (project RD12/0019/0036

Improved efficiency of ibuprofen by cationic carbosilane dendritic conjugates

In order to improve the efficiency of the anti-inflammatory drug ibuprofen, cationic carbosilanedendrimers and dendrons with ibuprofen at their periphery or at their focal point, respectively, havebeen synthesized and the release of the drug was studied using HPLC. Macrophages were used toevaluate the anti-inflammatory effect of the ibuprofen-conjugated dendritic systems and comparedwith mixtures of non-ibuprofen dendritic systems in the presence of the drug. The cationic ibuprofenconjugateddendron was the compound that showed higher anti-inflammatory properties. It reduces the LPS-induced COX-2 expression, decreases the release of several inflammatory cytokines such as TNFalfa, IL-1beta, IL-6 and CCL3. These results open new perspectives in the use of these compounds asdrug carriers.Ministerio de Economía y Empres

Bioactives Overproduction through Operational Strategies in the Ichthyotoxic Microalga Heterosigma akashiwo Culture

The red tide-forming microalga Heterosigma akashiwo has been associated with massive events of fish deaths, both wild and cultured. Culture conditions are responsible for the synthesis or accumulation of some metabolites with different interesting bioactivities. H. akashiwo LC269919 strain was grown in a 10 L bubble column photobioreactor artificially illuminated with multi-coloured LED lights. Growth and production of exopolysaccharides, polyunsaturated fatty acids (PUFAs), and carotenoids were evaluated under different culture modes (batch, fed-batch, semicontinuous, and continuous) at two irradiance levels (300 and 700 µE·s−1·m−2). Continuous mode at the dilution rate of 0.2·day−1 and 700 µE·s−1·m−2 provided the highest production of biomass, PUFAs (132.6 and 2.3 mg·L−1·day−1), and maximum fucoxanthin productivity (0.16 mg·L−1·day−1). The fed-batch mode accumulated exopolysaccharides in a concentration (1.02 g·L−1) 10-fold over the batch mode. An extraction process based on a sequential gradient partition with water and four water-immiscible organic solvents allowed the isolation of bioactive fucoxanthin from methanolic extracts of H. akashiwo. Metabolites present in H. akashiwo, fucoxanthin and polar lipids (i.e., eicosapentaenoic acid (EPA)), or probably such as phytosterol (β-Sitosterol) from other microalgae, were responsible for the antitumor activity obtained.This research was funded by the General Secretariat of Universities, Research and Technology of the Andalusian Government (grant: P18-RT-2477) and the State Research Agency (grants PID2019-109476RB-C22) of the Spanish Ministry of Science, Innovation and Universities

Propiedades Físico-Mecánicas de una Guadua Mexicana (Guadua aculeata)

En este artículo se presentan las propiedades físicas y mecánicas del culmo de Guadua aculeata. El material de estudio se colectó en el predio “Las Margaritas”, Hueytamalco, Puebla, México. El marcado, derribo y ensayo se realizó tomando como referencia las normas ISO 22157-1 ISO e ISO/TR 22157-2. Se presentan valores promedio de los resultados para las secciones inferior, media y superior; se observa que la densidad básica (peso anhidro/volumen verde) varia de 560 a 660 kg/m3 de la base a la parte superior del culmo. Las contracciones totales promedio fueronde 13,9 % en espesor; 7,1 % en diámetro y 0,1 % en longitud. En el caso de las propiedades mecánicas se encontró que el esfuerzo máximo cortante varió de 6,0 a 10,5 MPa; el esfuerzo máximo en compresión paralela a la fibra incrementó de 28,2 a 56,7 MPa de la sección inferior a la superior y su módulo de elasticidad de 13,7 a 20,7 GPa.El módulo de ruptura en flexión de 51,9 a 79,6 MPa y su módulo de elasticidad de 15,1 a 24,1 GPa. La resistencia en tensión paralela a la fibra se incrementó de 58,5 a 92,2 MPa y el módulo de elasticidad en ese esfuerzo de 8,2 a 9,8 GPa. La especie estudiada tiene propiedades físicas, mecánicas y geométricas similares a la G. angustifolia quese utiliza en la construcción en países como Colombia, Costa Rica, Panamá, Venezuela y Ecuador.The physical and mechanical properties of Guadua aculeata culm are shown in this paper. The study material was collected from the locality “Las Margaritas” Hueytamalco, Puebla, Mexico. The marking, felling and testingwas performed with reference to ISO standards ISO 22157-1 and ISO/TR 22157-2. The average values of the results of low, middle and upper sections are shown; the basic density (dry weight / green volume) ranged from 560 to 660 kg/m3 of the lower to upper culm section. The average total contractions were 13,9% in thickness; 7,1% in diameterand 0,1% in length. In the case of mechanical properties were found that the maximum shear stress varies from 6,0 to10,5 MPa; the maximum stress in compression parallel to fiber increased from 28,2 to 56,7 MPa from low to top section and the modulus of elasticity from 13,7 to 20,7 GPa. The modulus of rupture in bending varies from 51,9 to 79,6 MPa and the modulus of elasticity from 15,1 to 24,1 GPa. The strength in tension parallel to the fiber also increased from 58,5 to 92,2 MPa and modulus of elasticity ranged from 8,2 to 9,8 GPa. The studied specie has the same physical, mechanical and geometric properties to G. angustifolia that it is used in the construction in countries how Colombia, Costa Rica, Panama, Venezuela and Ecuador

The thirty gigahertz instrument receiver for the Q-U-I Joint Tenerife experiment: concept and experimental results

This paper presents the analysis, design, and characterization of the thirty gigahertz instrument receiver developed for the Q-U-I Joint Tenerife experiment. The receiver is aimed to obtain polarization data of the cosmic microwave background radiation from the sky, obtaining the Q,U, and I Stokes parameters of the incoming signal simultaneously. A comprehensive analysis of the theory behind the proposed receiver is presented for a linearly polarized input signal, and the functionality tests have demonstrated adequate results in terms of Stokes parameters, which validate the concept of the receiver based on electronic phase switching