Aplicación de la Tecnología Building Information Modeling para obtener mejoras en la elaboración del proyecto Oficinas Matucana - Huarochirí, Lima - 2019

El presente estudio tiene como título “Aplicación de la Tecnología Building Information Modeling para obtener mejoras en la elaboración del proyecto Oficinas Matucana – Huarochirí, Lima – 2019”. Esta investigación tuvo como objetivo aplicar la tecnología Building Information Modeling para obtener mejoras en la elaboración del proyecto oficinas Matucana donde se tomará en cuenta las dimensiones de calidad, costo y tiempo. Brindar procedimientos para elaborar un modelo BIM 3D, plantillas de metrados en el modelo elaborado con el programa REVIT, realizar una construcción virtual llamado también modelo BIM 4D con el programa NAVISWORK manage 2018, dar una mejor visualización del proyecto para elaborar el cronograma de obra, además mostrar el modelo BIM 5D que fue ejecutado con el programa CPOC para elaborar el presupuesto total del proyecto. El presente estudio está enfocado en una metodología aplicada, con un diseño no experimental de nivel descriptivo, Se aplicó como instrumento la recolección de datos mediante los resultados de los modelos BIM. Los resultados probaran la síntesis del contenido, llegando a las conclusiones de poder resolver la problemática encontrada, realizando recomendaciones que permitan mejorar la calidad de los proyectos futuros en proyectos civiles

Development of a moisture-in-solid-insulation sensor for power transformers

Moisture is an important variable that must be kept under control to guarantee a safe operation of power transformers. Because of the hydrophilic character of cellulose, water mainly remains in the solid insulation, while just a few parts per million are dissolved in oil. The distribution of moisture between paper and oil is not static, but varies depending on the insulation temperature, and thus, water migration processes take place continuously during transformers operation. In this work, a sensor is presented that allows the determination of the moisture content of the transformer solid insulation in the steady state and during the moisture migration processes. The main objective of the design is that the electrodes of the sensor should not obstruct the movement of water from the solid insulation to the oil, so the proposed prototype uses a metallic-mesh electrode to do the measurements. The measurement setup is based on the characterization of the insulation dielectric response by means of the frequency dielectric spectroscopy (FDS) method. The sensitivity of the proposed sensor has been tested on samples with a moisture content within 1% to 5%, demonstrating the good sensitivity and repeatability of the measurements.This work has been supported by the Spanish Government under Contract DPI2012-35819

COMPARACIÓN ENTRE ALGORITMOS DE ORDENAMIENTO PARALELIZADOS EN JAVA (COMPARISON BETWEEN SORTING ALGORITHMS PARALLELIZED IN JAVA)

ResumenSe analiza el rendimiento en tiempo, de los algoritmos de ordenamiento Bubble Sort, Odd Even Sort, Rank Sort, Counting Sort, Radix Sort, Merge Sort, Bitonic Sort y Quick Sort; paralelizados y ejecutados en una instancia de la Máquina Virtual de Java (JVM).En el caso de Odd Even Sort, la sincronización al esperar en la barrera cíclica reduce la ventaja de procesamiento adquirida al incrementar la cantidad de núcleos. En cambio, Bubble Sort y Rank Sort, mejoran su rendimiento global al incrementar los núcleos y requerir menor sincronización.Por otra parte, Bitonic Sort, Merge Sort y Quick Sort, tienen un tiempo de ejecución muy bajo al utilizarse en un solo núcleo, puede notarse que se obtiene un beneficio de múltiples núcleos, sin embargo, al acercarse al tiempo necesario en la JVM para lanzar los hilos, el beneficio de escalar la cantidad de núcleos deja de producir un beneficio.Palabras Clave: comparación, multi-núcleo, ordenamiento.AbstractThis analyses the time performance of sorting algorithms Bubble Sort, Odd Even Sort, Rank Sort, Counting Sort, Radix Sort, Merge Sort, Bitonic Sort and Quick Sort; parallelized and executed in an instance of the Java Virtual Machine (JVM).In the case of Odd Even Sort, the wait at the synchronization cyclic barrier reduce the processing advantage acquired by incrementing the quantity of cores. In contrast, Bubble Sort and rank Sort, increase their global performance with the increment of number of cores and requiring less synchronization.On the other hand, Bitonic Sort Merge Sort and Quick Sort, have a very low execution time when used in a single core, it can be noticed that a benefit of multiple cores, however, when approaching the necessary time in the JVM to launch threads, the benefit of scaling the number of cores stops producing a benefit.Keywords: comparison, multi-core, sorting

Habitat differences filter functional diversity of low dispersive microscopic animals (Acari, Halacaridae)

We are starting to appreciate that microscopic animals are not as widespread as previously thought, but we still ignore to what extent and through which mechanisms the environment selects for specific communities or traits in microscopic animals. We here analyse the functional diversity of marine mite communities living in a seagrass meadow across two habitats: the leaves and the matte. The strictly benthic lifestyle and the conserved morphology of mites allow for unambiguous characterisation of their functional traits, while the discrete nature of the two habitats alleviates the uncertainty in their ecological characterisation. Our results show that habitat filters the distribution of certain traits favouring a higher diversity, dispersion, and evenness of functional traits in the matte than in the leaves. We further observed temporal variations in the functional diversity of communities, following the changes in biomass and structure of seagrass leaves. However, despite the stark differences between the two habitats, the filtering effect is partial and affects mostly relative species abundances. Our study emphasises the need of moving from a taxonomical towards a functional view of ecological studies of microscopic organisms. This integrative approach is key to achieve a mechanistic understanding of their habitat and distribution patterns.Peer reviewe

Unveiling the Dynamics of the Universe

We explore the dynamics and evolution of the Universe at early and late times, focusing on both dark energy and extended gravity models and their astrophysical and cosmological consequences. Modified theories of gravity not only provide an alternative explanation for the recent expansion history of the universe, but they also offer a paradigm fundamentally distinct from the simplest dark energy models of cosmic acceleration. In this review, we perform a detailed theoretical and phenomenological analysis of different modified gravity models and investigate their consistency. We also consider the cosmological implications of well motivated physical models of the early universe with a particular emphasis on inflation and topological defects. Astrophysical and cosmological tests over a wide range of scales, from the solar system to the observable horizon, severely restrict the allowed models of the Universe. Here, we review several observational probes -- including gravitational lensing, galaxy clusters, cosmic microwave background temperature and polarization, supernova and baryon acoustic oscillations measurements -- and their relevance in constraining our cosmological description of the Universe.Comment: 94 pages, 14 figures. Review paper accepted for publication in a Special Issue of Symmetry. "Symmetry: Feature Papers 2016". V2: Matches published version, now 79 pages (new format

Induction of DNA double-strand breaks and cellular senescence by human respiratory syncytial virus

Human respiratory syncytial virus (HRSV) accounts for the majority of lower respiratory tract infections during infancy and childhood and is associated with significant morbidity and mortality. HRSV provokes a proliferation arrest and characteristic syncytia in cellular systems such as immortalized epithelial cells. We show here that HRSV induces the expression of DNA damage markers and proliferation arrest such as P-TP53, P-ATM, CDKN1A and γH2AFX in cultured cells secondary to the production of mitochondrial reactive oxygen species (ROS). The DNA damage foci contained γH2AFX and TP53BP1, indicative of double-strand breaks (DSBs) and could be reversed by antioxidant treatments such as N-Acetylcysteine (NAC) or reduced glutathione ethyl ester (GSHee). The damage observed is associated with the accumulation of senescent cells, displaying a canonical senescent phenotype in both mononuclear cells and syncytia. In addition, we show signs of DNA damage and aging such as γH2AFX and CDKN2A expression in the respiratory epithelia of infected mice long after viral clearance. Altogether, these results show that HRSV triggers a DNA damage-mediated cellular senescence program probably mediated by oxidative stress. The results also suggest that this program might contribute to the physiopathology of the infection, tissue remodeling and aging, and might be associated to long-term consequences of HRSV infections.This work was supported by Grants MPY-1038/14 to Alberto Zambrano, PI 11/00590 to Isidoro Martínez and RD12/0036/0030 to Ana Aranda from FIS (Instituto de Salud Carlos III) and Grant BFU2011-28958, from Ministerio de Economía y Competitividad to Ana Aranda. The authors have no conflicting financial interests

Hardware para interfaz cerebro computador

Las interfaces cerebro computador, han empezado a verse en múltiples aplicaciones. Existen dispositivos comerciales para ser utilizados como sistemas de captura para esta tecnología, el problema radica en los costos de los mismos. En este artículo, se presenta la construcción de un equipo de captura de electroencefalografía de bajo costo que se conecta al computador para poder ser utilizado con este fin

Hardware para interfaz cerebro computador

Las interfaces cerebro computador, han empezado a verse en múltiples aplicaciones. Existen dispositivos comerciales para ser utilizados como sistemas de captura para esta tecnología, el problema radica en los costos de los mismos. En este artículo, se presenta la construcción de un equipo de captura de electroencefalografía de bajo costo que se conecta al computador para poder ser utilizado con este fin