531 research outputs found

    Reporte de formación complementaria en área de concentración de sistemas digitales

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    El presente trabajo contiene proyectos enfocados en el diseño de sistemas digitales utilizando principalmente herramientas utilizadas en la industria, tales como: OVM, UVM, SystemVerilog, ModelSim, QuestaSim y FPGAs. Los proyectos presentados a continuación se enfocan en arquitectura de computadoras modernas. Se desarrolló un sistema RISC, basado en arquitectura MIPS segmentado (pipeline), predictor de saltos (Jump Predictor Unit), detector de errores (Hazzard Unit), unidad de acarreo (Fordward Unit) y con un sistema de memoria temporal (cache). También se implementó el protocolo MESI para mantener la coherencia de la memoria cache con la memoria principal (RAM). Además cada proyecto se elaboró en base a estándares usados en la industria. Incluyendo el orden en el proceso de diseño de un circuito integrado: la generación de especificaciones de diseño (Hardware Architecture Specification HAS), creación de un plan de pruebas (test plan), creación de un ambiente de verificación formal en System Verilog (test bench), creación de las pruebas, ejecución de las pruebas y por último detección de errores en el diseño y corrección de los mismos

    Educación inclusiva en el contexto de un colegio jesuita

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    La institución educativa en la que se realizó la intervención pretende otorgar una formación integral a sus estudiantes, por lo que en los últimos años ha recibido a alumnos con discapacidad motriz que enfrentan diversas problemáticas, tanto dentro del aula como fuera de ella, pues para participar de manera activa en las diversas actividades, el centro aún debe trabajar muchos aspectos para eliminar barreras sociales y de comunicación. El proyecto de Escuela Inclusiva que se presenta a continuación pretende sensibilizar y formar al cuerpo docente de secundaria para la atención de estos alumnos, y con el cual se logra concretar procesos de formación para la atención de la diversidad, particularmente de alumnos con discapacidad.ITESO, A. C

    Hybrids Provide More Options for Fine-Tuning Flowering Time Responses of Winter Barley

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    Crop adaptation requires matching resource availability to plant development. Tight coordination of the plant cycle with prevailing environmental conditions is crucial to maximizing yield. It is expected that winters in temperate areas will become warmer, so the vernalization requirements of current cultivars can be desynchronized with the environment’s vernalizing potential. Therefore, current phenological ideotypes may not be optimum for future climatic conditions. Major genes conferring vernalization sensitivity and phenological responses in barley (Hordeum vulgare L.) are known, but some allelic combinations remain insufficiently evaluated. Furthermore, there is a lack of knowledge about flowering time in a hybrid context. To honor the promise of increased yield potentials, hybrid barley phenology must be studied, and the knowledge deployed in new cultivars. A set of three male and two female barley lines, as well as their six F1 hybrids, were studied in growth chambers, subjected to three vernalization treatments: complete (8 weeks), moderate (4 weeks), and low (2 weeks). Development was recorded up to flowering, and expression of major genes was assayed at key stages. We observed a gradation in responses to vernalization, mostly additive, concentrated in the phase until the initiation of stem elongation, and proportional to the allele constitution and dosage present in VRN-H1. These responses were further modulated by the presence of PPD-H2. The duration of the late reproductive phase presented more dominance toward earliness and was affected by the rich variety of alleles at VRN-H3. Our results provide further opportunities for fine-tuning total and phasal growth duration in hybrid barley, beyond what is currently feasible in inbred cultivars.his research was supported by the contract “Iberia region hybrid barley variety development and understanding effects of adaptation genes in hybrids,” between CSIC and Syngenta (Basel, Switzerland) Crop Protection AG, which included funding for MF-C scholarship

    Railway rolling noise mitigation through optimal track design

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    [EN] The main goal of the present work lies in the identification of the railway track properties that influence acoustic radiation, as well as in the analysis of these properties for the reduction of sound levels. This is achieved through a dynamic model of the railway wheel and track that allows the study of rolling noise, produced as a result of the wheel/rail interaction. Once the vibrational response of the railway components is determined, the sound power radiated by them is evaluated. The influence of the track properties on the sound radiation is determined by analysing the acoustic power results of different track configurations. From the results obtained, a number of guidelines are presented for noise mitigation of the involved railway elements. Between the worst and the best track design, there are differences of approximately 7.4 dB(A) in the radiation considering the wheel, rail and sleeper noise.The authors gratefully acknowledge the financial support of Agencia Estatal de Investigación and European Regional Development Fund (grant FPU18/03999, project TRA2017-84701-R and project PID2020-112886RA-I00)Andrés Ruiz, V.; Martínez Casas, J.; Carballeira Morado, J.; Denia Guzmán, F.; Thompson, DJ. (2022). Railway rolling noise mitigation through optimal track design. En Proceedings of the YIC 2021 - VI ECCOMAS Young Investigators Conference. Editorial Universitat Politècnica de València. 313-319. https://doi.org/10.4995/YIC2021.2021.12583OCS31331

    Clinical Application of Optical Coherence Tomography in the Corneal Degenerations

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    Anterior segment optical coherence tomography (AS-OCT) has become an essential tool in the diagnosis and management of corneal degenerations. AS-OCT optical findings and thickness measurements are useful for the proper evaluation of the ocular surface diseases. AS-OCT imaging provides noninvasive information necessary to decide clinical and surgical management. This device helps to achieve a correct pre-intervention investigation and will allow physicians to compare the corneal status after the surgical process. Thus, it is useful to evaluate the corneal thickness, areas of hyper-reflective material, and corneal fibrosis in certain disorders such as Salzmann’s nodular degeneration (SND) and Terrien’s marginal degeneration (TMD), before and following the surgical process

    Energy efficiency and lighting design in courtyards and atriums: A predictive method for daylight factors

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    The proper design of courtyards and atriums is key in providing sufficient daylight inside buildings as well as major energy savings in electric lighting. Although a suitable design requires calculations using lighting simulation software or complex algorithms, architects lack a quick and precise procedure to determine proper design. The aim of this research is therefore to offer a fast accurate method for determining the daylight factor for different points on a rectangular courtyard or the central space of an atrium, based on the variable geometry and reflectance of the inner surfaces. Firstly, daylight factors are defined using measurements in scale models in an artificial sky and values obtained in real courtyards under real overcast skies. The sky component is subsequently defined based on earlier studies and Tregenza algorithms in order to quantify the reflected component. Following the curve fitting process, a predictive method of daylight factors is defined and compared with the previous measures. The comparison demonstrates that the predictive method offers an average accuracy of over 90% based on a quick and easy calculation. Finally, the energy saving in electric lighting is quantified following the predictive method established

    Water Stress Enhances the Progression of Branch Dieback and Almond Decline under Field Conditions

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    Branch dieback and tree decline have been described as a common complex disease worldwide in woody crops, with Botryosphaeriaceae and Diaporthaceae being considered the most frequent fungi associated with the disease symptoms. Their behaviour is still uncertain, since they are considered endophytes becoming pathogenic in weakened hosts when stress conditions, such as water deficiency occur. Therefore, the main goal of this study was to determine if water stress enhances general decline on weakened almond trees subjected to different irrigation treatments under natural field conditions. In parallel, the occurrence of fungal species associated with almond decline was also determined in relation to disease progression by fungal isolation, and morphological and molecular based-methods. The symptoms of branch dieback and general decline were observed over time, mainly in the experimental plots subjected to high water deficiency. Botryosphaeriaceae were the most consistently isolated fungi, and Botryosphaeria dothidea was the most frequent. Collophorina hispanica was the second most frequent species and Diaporthe and Cytospora species were isolated in a low frequency. Most of them were recovered from both asymptomatic and symptomatic trees, with their consistency of isolation increasing with the disease severity. This work reveals the need to elucidate the role of biotic and abiotic factors which increase the rate of infection of fungal trunk pathogens, in order to generate important knowledge on their life cycle

    Elevated temperature may reduce functional but not taxonomic diversity of fungal assemblages on decomposing leaf litter in streams

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    First published: 15 October 2021Mounting evidence points to a linkage between biodiversity and ecosystem functioning (B-EF). Global drivers, such as warming and nutrient enrichment, can alter species richness and composition of aquatic fungal assemblages associated with leaf-litter decomposition, a key ecosystem process in headwater streams. However, effects of biodiversity changes on ecosystem functions might be countered by the presumed high functional redundancy of fungal species. Here, we examined how environmental variables and leaf-litter traits (based on leaf chemistry) affect taxonomic and functional alpha- and beta-diversity of fungal decomposers. We analysed taxonomic diversity (DNA-fingerprinting profiles) and functional diversity (community-level physiological profiles) of fungal communities in four leaf-litter species from four subregions differing in stream-water characteristics and riparian vegetation. We hypothesized that increasing stream-water temperature and nutrients would alter taxonomic diversity more than functional diversity due to the functional redundancy among aquatic fungi. Contrary to our expectations, fungal taxonomic diversity varied little with stream-water characteristics across subregions, and instead taxon replacement occurred. Overall taxonomic beta-diversity was fourfold higher than functional diversity, suggesting a high degree of functional redundancy among aquatic fungi. Elevated temperature appeared to boost assemblage uniqueness by increasing beta-diversity while the increase in nutrient concentrations appeared to homogenize fungal assemblages. Functional richness showed a negative relationship with temperature. Nonetheless, a positive relationship between leaf-litter decomposition and functional richness suggests higher carbon use efficiency of fungal communities in cold waters.Spanish Ministry of Education, Culture and Sports, Grant/Award Number: EST16/00771 and FPU13/01021; Spanish Ministry of Science and Innovation, Grant/Award Number: CGL2012-39635; 2014-2020 FEDER Operative Program Andalusia, Grant/Award Number: FEDER-UAL18-RNM-B006-B; Portuguese Foundation for Science and Technology; COMPETE2020 - Programa Operacional Competitividade e Internacionalizacao (POCI), Grant/Award Number: PTDC/ CTA-AMB/31245/201
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