Models of Numerical Analysis Using Exchange Files

[Resumen] El presente artículo describe los avances efectuados en el ámbito de la generación de modelos de análisis numérico, combinando técnicas de diseño asistido por ordenador y de programación para lograr un intercambio de información entre aplicaciones de diferente propósito. Esto permite mejorar el proceso, usando en cada fase las herramientasque específicamente pueden optimizarla. El planteamiento ha resultado especialmente útil en estudios de estabilidad realizados sobre edificaciones con valor histórico o con singularidades geométricas de todo tipo. En estos casos, la gran complejidad del modelo dificulta extraordinariamente su introducción, si sólo se utilizan las herramientas de preproceso convencionales.[Abstract] This work describes the advancements made in the development of models of numerical analysis, combining Computer-Aided Design (CAD) and programming to exchange information between different applications. This allows improvements in the process, given specific tools can be used to optimize each phase. This approach has been especially useful in studies of stability performed on historical buildings. In these cases it is extremely difficult to develop a model given its complexity if only conventional preprocessing tools are to be used

The opening of schools to your environment: secondary education centres

La sociedad actual plantea nuevos retos a las organizaciones educativas, sus demandas reflejan la necesidad de capacitar al alumnado para el mundo laboral, lo que plantea la importancia de participar, trabajar en equipo y colaborar juntamente. Así los Centros Educativos, sobre todo los que ofertan enseñanzas secundarias, se plantean la necesidad de establecer relaciones de colaboración con el entorno. Debido a esta realidad, nuestro estudio persigue como objetivo dar a conocer las relaciones de colaboración que los centros de educación secundaria de Andalucía mantienen con el entorno. Para ello, se ha utilizado una metodología cuantitativa, que mediante el uso del cuestionario nos ayudó a contextualizar el problema de investigación. Los resultados reflejan que las relaciones más destacadas son las establecidas con otros centros educativos de la ciudad y con las instituciones locales, y dentro de las menos destacadas, se encuentran las relaciones establecidas con los sindicatos y agentes sociales.Current society poses new challenges to educational organizations, their demands reflect the need to train the students for the workplace, raising the importance of participation, teamwork and working together. So schools, especially those that offer secondary teaching, raises the need to establish collaborative relationships with the environment. Due to this fact, our study aims to present objective partnerships that secondary schools in Andalusia have with the environment. To do this, we used a quantitative methodology, that by using the questionnaire helped to contextualize the research problem. The results show that the most important relationships are established with other schools in the city and local institutions, and within less prominent, are established relationships with unions and social partners

Eco‐Holonic 4.0 Circular Business Model to Conceptualize Sustainable Value Chain Towards Digital Transition

The purpose of this paper is to conceptualize a circular business model based on an Eco-Holonic Architecture, through the integration of circular economy and holonic principles. A conceptual model is developed to manage the complexity of integrating circular economy principles, digital transformation, and tools and frameworks for sustainability into business models. The proposed architecture is multilevel and multiscale in order to achieve the instantiation of the sustainable value chain in any territory. The architecture promotes the incorporation of circular economy and holonic principles into new circular business models. This integrated perspective of business model can support the design and upgrade of the manufacturing companies in their respective industrial sectors. The conceptual model proposed is based on activity theory that considers the interactions between technical and social systems and allows the mitigation of the metabolic rift that exists between natural and social metabolism. This study contributes to the existing literature on circular economy, circular business models and activity theory by considering holonic paradigm concerns, which have not been explored yet. This research also offers a unique holonic architecture of circular business model by considering different levels, relationships, dynamism and contextualization (territory) aspects

Regional Spillovers of Transport Infrastructure Investment: A Territorial Cohesion Analysis

Territorial cohesion is a routine part of the job of spatial planners. However, it has not always been measured using a valid and solid methodology. This paper addresses conceptually how regional spillovers of transport investments of the Spanish master plan (‘‘Plan Estratégico de Infraestructuras y Transporte’’ 2005–2020) affect territorial cohesion. Different periods undergo analysis using the ‘‘extraction method’’. We calculate regional spillovers by accessibility gains measured in economic potential units (gravitational method using GDPs for each centroid under analysis). Two different typologies of regional spillovers are given, according to the direction of the effects: upstream and downstream. We conclude that the ‘Plan Estratégico’ favours territorial cohesion of Spain, but the degree of territorial cohesion produced by each region is not uniform. The end of the paper raises a number of suggestions for further research on the interaction of regional spillovers with territorial cohesion

Diseño de soporte de bajo coste para la corrección de la displasia de cadera en perros medianos y grandes

Hip dysplasia is a disease that affects medium and large dogs. It is produced by different causes such as genetics, weight and care of the pet. Currently, in Colombia there are not specialized mechanisms that provide comfort to their lives. Therefore, in the present study, a versatile and standard device was designed to help improve the quality of life of these animals, taking as a reference the breed "German Shepherd". The average weight of the previous one is 28 kilograms and of medium-large size between 45 and 70 centimeters. The device was made considering the health and welfare of the animals considering the mobility and safety of their limbs. Likewise, this mechanism adapts to the canine condition, promoting the use and mobility of its hind legs until mobility is completely lost. Its design and manufacturing cost was 100 USD.La displasia de cadera es una enfermedad que afecta a perros medianos y grandes. Es producido por diferentes causas como la genética, el peso y el cuidado de la mascota. Actualmente, en Colombia no existen mecanismos especializados que brinden comodidad a sus vidas. Por lo tanto, en el presente estudio, se diseñó un dispositivo versátil y estándar para ayudar a mejorar la calidad de vida de estos animales, tomando como referencia la raza "Pastor Alemán". El peso medio del anterior es de 28 kilogramos y de tamaño mediano-grande entre 45 y 70 centímetros. El dispositivo se hizo teniendo en cuenta la salud y el bienestar de los animales teniendo en cuenta la movilidad y la seguridad de sus extremidades. Asimismo, este mecanismo se adapta a la condición canina, promoviendo el uso y movilidad de sus patas traseras hasta que la movilidad se pierde por completo. Su costo de diseño y fabricación fue de 100 USD

Synthesis of Enantiopure Oxygen- and Nitrogen-Containing Heterocycles by Diastereoselective Ring-Closing Metathesis Reaction in Perhydro-1,3-benzoxazine Derivatives

Producción CientíficaDiastereoselective ring‐closing metathesis reactions on chiral trienic perhydro‐1,3‐benzoxazines derived from (−)‐8‐aminomenthol featuring two diastereotopic olefin chains is described. The diastereochemical outcome of the cyclization appeared to be dependent on the length and position of the olefin chains in perhydro‐1,3‐benzoxazine, the degree of substitution of the double bonds and the ruthenium catalyst used. After separation of the diastereomers, and removal of the chiral auxiliary, enantiopure oxygen‐ and nitrogen‐containing heterocycles were obtained.Ministerio de Economía, Industria y Competitividad (Project FEDER-CTQ2014-59870-P)Junta de Castilla y León (Ref. Project FEDER-VA115P17

Spatial analysis of the competitiveness of the high-speed train and air transport: The role of access to terminals in the Madrid? Barcelona corridor

This paper analyzes the effect of access and egress time to transport terminals over the spatial competiveness of the high-speed train (HST) in the Madrid–Barcelona (Spain) corridor, one of the densest airline domestic markets in the world. Applying spatial data from 2010 provided by a geographical information system (GIS) to a mode choice model estimated with sample travelers in this corridor, the present study examines whether and how the level-of-service of transport terminals spatially affects the competitiveness or modal distribution of HST and air transport in the provinces of Madrid and Barcelona; and, in particular, the degree of competitiveness that can be accrued by the access time provided by private car and transit in different market segments, especially mandatory and leisure trips. In a number of urban zones near train stations and airports, terminal accessibility clearly favors one transport mode in comparison to the other. Improving terminal accessibility via private car or public transit not only affects the relative access to terminals, but also represents a key strategy for readjusting the market shares of the competing modes in the corridor

Structural modelling of medieval walls

International Seminar on Structural Analysis of Historical Constructions (3º 2001 Guimaraens)Sistemas constructivos medievales a menudo involucrados la construcción de múltiples capas paredes formadas por dos caras de sillería o mampostería con un relleno central que consiste en escombros ligada con mortero, generalmente cal-basado. Se trata de una construcción simple y eficiente sistema que se siguió utilizando en los siglos posteriores. Sin embargo, el modelado estructural de este tipo de pared no es fácil de lograr. Los dos pared caras no están vinculados rígidamente y, por otro lado, las bóvedas son normalmente compatibles sólo en el la cara interna, lo que resulta en la eficiencia reducida de la unidad de pared. Modelos comunes de elementos finitos no son capaces de resolver muchos de los problemas que surgen cuando se aplican a una monumental construcción. En este trabajo se aborda el problema y propone varias posibilidades de solución con diferentes tipos de elementos .. También proporciona dos ejemplos de monumentos góticos en Galicia (España) en el que comportamiento estructural se ha estudiado el uso de algunos de estos modelos de cálculo: las iglesias de Guimaraens y Cambados.[Abstract]Medieval construction systems usually involved the construction of multi-layer walls formed by two faces of ashlar work or masonry with a central infilling consisting of rubble bound with mortar, generally lime-based. It is a simple and efficient construction system which continued to be used in subsequent centuries. Nevertheless, structural modelling of this type of wall is not easy to achieve. The two wall faces are not rigidly bound and on the other hand, vaults are normally supported only on the intemal face, resulting in reduced efficiency of the wall unit. Common models of finite elements are unable to solve many of the problems that arise when they are applied to a monumental construction. This paper tackles the problem and puts forward various possibilities of solution with different element types.. It also provides two examples of Gothic monuments in Galicia (Spain) in which structural behaviour was studied using some of these calculation models: the churches of Guimarei and Cambados

DNA methylation in ciliates: implications in differentiation processes

Much experimental evidence on the role of DNA methylation in gene expression has been reported. Here we review reports on DNA methylation in ciliated protozoa, emphasizing its implications in cell differentiation processes. Both types of methylated bases (adenine and cytosine) can be found in macronuclear DNA. The division cycle and conjugation have been studied with regard to adenine methylation, and several different functions have been assigned to the methylation changes detected in these processes. Cytosine methylation changes were analyzed during stomatogenesis of Paramecium and encystment of Colpoda inflata. A comparative analysis with other similar microbial eukaryotic differentiation processes is carried out

Hidrógeno electrolítico para la gestión de la red eléctrica

La variabilidad de la demanda a lo largo de las horas del día y las estaciones del año, junto a la generación aleatoria de la mayoría de las fuentes de energía renovable, sitúan al sistema eléctrico ante un nuevo y fascinante paradigma; ello resulta especialmente relevante en redes relativamente aisladas y con una notable penetración de los parques eólicos, como sucede actualmente en España. La figura 1 muestra una curva típica, con dos puntas que reflejan sobretodo las necesidades de climatización durante las horas cálidas del estío e iluminación en los días cortos del invierno