Efectos de la geometría del hombro de la herramienta sobre las propiedades mecánicas de juntas soldadas por fricción-agitación de aleación de aluminio AA1100

In this work were studied the effects of shoulder geometry of tool on microstructure evolution and mechanical properties of friction stir welded joints of AA1100 aluminum alloy using a milling machine. Three designs of shoulder geometry were evaluated with the aim to induce different distributions of thermal cycles in welding regions. Thermal cycles were measured using thermocouples and a data system acquisition. A microstructural characterization and crystallographic analysis of the welded regions were carried out using optical, scanning electron microscopy, and electron backscattering diffraction. The mechanical properties were measured by transverse tension, guided bend and hardness tests. The weldability behavior was established based on the experimental data. Results showed that the features shoulder tools produced an important effect on the thermal cycles, generating a plasticized wide region and biggest grain size in stir zone when compared with flat shoulder tool.En este trabajo se estudiaron los efectos de la geometría del hombro de la herramienta en la evolución de la microestructura y las propiedades mecánicas de juntas soldadas de aleación de aluminio AA1100 obtenidos por fricción-agitación usando una máquina fresadora. Tres diseños de hombros se evaluaron con el objetivo de inducir distribuciones diferentes de ciclos térmicos en las regiones de soldadura. Los ciclos térmicos se midieron utilizando termopares y un sistema de adquisición de datos. Caracterización microestructural y análisis cristalográfico de las regiones soldadas se hicieron usando, microscopía óptica y electrónica de barrido, además de difracción de electrones retrodispersados. Las propiedades mecánicas se determinaron por ensayos de tracción, doblez guiado y pruebas de dureza. El comportamiento de la soldabilidad se estableció con base en datos experimentales. Los resultados mostraron que las herramientas con hombro configurado tienen un efecto importante en los ciclos térmicos, generando una amplia región plastificada y el mayor tamaño de grano en la zona de agitación en comparación con la herramienta de hombro plano

Effects of shoulder geometry of tool on microstructure and mechanical properties of friction stir welded joints of AA1100 aluminum alloy

In this work were studied the effects of shoulder geometry of tool on microstructure evolution and mechanical properties of friction stir welded joints of AA1100 aluminum alloy using a milling machine. Three designs of shoulder geometry were evaluated with the aim to induce different distributions of thermal cycles in welding regions. Thermal cycles were measured using thermocouples and a data system acquisition. A microstructural characterization and crystallographic analysis of the welded regions were carried out using optical, scanning electron microscopy, and electron backscattering diffraction. The mechanical properties were measured by transverse tension, guided bend and hardness tests. The weldability behavior was established based on the experimental data. Results showed that the features shoulder tools produced an important effect on the thermal cycles, generating a plasticized wide region and biggest grain size in stir zone when compared with flat shoulder tool.En este trabajo se estudiaron los efectos de la geometría del hombro de la herramienta en la evolución de la microestructura y las propiedades mecánicas de juntas soldadas de aleación de aluminio AA1100 obtenidos por fricción-agitación usando una máquina fresadora. Tres diseños de hombros se evaluaron con el objetivo de inducir distribuciones diferentes de ciclos térmicos en las regiones de soldadura. Los ciclos térmicos se midieron utilizando termopares y un sistema de adquisición de datos. Caracterización microestructural y análisis cristalográfico de las regiones soldadas se hicieron usando, microscopía óptica y electrónica de barrido, además de difracción de electrones retrodispersados. Las propiedades mecánicas se determinaron por ensayos de tracción, doblez guiado y pruebas de dureza. El comportamiento de la soldabilidad se estableció con base en datos experimentales. Los resultados mostraron que las herramientas con hombro configurado tienen un efecto importante en los ciclos térmicos, generando una amplia región plastificada y el mayor tamaño de grano en la zona de agitación en comparación con la herramienta de hombro plano

Logística de distribución de productos perecederos fuente de oro (Meta) y Viotá (Cundinamarca)

Red Estructural, Diagrama de FlujoA partir de los diecisiete (17) Objetivos de Desarrollo Sostenible adoptados por las Asamblea General de las Naciones Unidas (2015) en Nueva York [1], en su Objetivo No. 2 que corresponde a Hambre cero, las consideraciones sobre cómo se debe administrar la cadena de suministro para los productos agrícolas han tomado tal relevancia, que en la actualidad se habla de las CSA – Cadenas de Suministro Agroalimentarias [As of seventeen (17) Sustainable Development Goals adopted by the United Nations General Assembly (2015) in New York [1], in Objective No. 2 corresponding to Zero Hunger, considerations on how to administer The supply chain for agricultural products has taken on such relevance, that at present there is talk of CSA - Agrifood Supply Chains [2]. The CSAs, for their analysis, involve the activities carried out in sequence, from the productive centers - farms - to the consumer's table, going through all the stages of activities of the typical supply chains

Propuesta para el desarrollo de un yogurt deslactosado con adición de semilla de chía y frutas.

Este trabajo se desarrolló por medio de la estrategia Food Design, como herramienta para la innovación de un producto alimenticio, el cual parte de una necesidad de los consumidores. Con esta investigación y la estrategia se busca innovar en el mercado con un Yogurt deslactosado, enfocado en aquellas personas intolerantes a la lactosa con el fin de mejorar su calidad de vida y no afectar su salud; por otra parte, con ello se lograría que las demandas de nuevos productos beneficien la economía de la región, debido a la generación de empleo y al crecimiento en los ingresos del sector agrícola y alimentario.This work was carried out through the Food Design strategy, as a tool for the innovation of a food product, which is develpped from a consumer needs. With this research and strategy we seek to innovate in the market with a free- lactose Yogurt, its focused on people who is lactose intolerant in order to improve their quality of life and not affect their health; on the other hand, with this it would be possible that the requests of new products benefit the economy of the region, due to the generation of employment and the growth in the income of the agricultural and food sector

Annual Conference on Formative Research on EFL. Practices thar inspire change.

The conference papers of the Annual Conference on Formative Research on EFL. Practices thar inspire change collect pedagogical experiences, research reports, and reflections about social issues, language teaching, teaching training, interculturality under the panorama of the Covid-19 pandemic. Each paper invites the reader to implement changes in their teaching practice through disruptive pedagogies, reflect on the social and emotional consequences of the lockdown, new paths for teacher training and different approaches for teaching interculturality. We expect to inspire new ways to train pre-service teachers and teach languages in this changing times

Disease: A Hitherto Unexplored Constraint on the Spread of Dogs (Canis lupus familiaris) in Pre-Columbian South America

Although debate continues, there is agreement that dogs (Canis lupus familiaris) were first domesticated in Eurasia, spreading from there to other parts of the world. However, while that expansion already extended as far as Europe, China, and North America by the early Holocene, dogs spread into (and south of) the tropics only much later. In South America, for example, the earliest well attested instances of their presence do not reach back much beyond 3000 cal. BC, and dogs were still absent from large parts of the continent – Amazonia, the Gran Chaco, and much of the Southern Cone – at European contact. Previous explanations for these patterns have focused on cultural choice, the unsuitability of dogs for hunting certain kinds of tropical forest prey, and otherwise unspecified environmental hazards, while acknowledging that Neotropical lowland forests witness high rates of canine mortality. Building on previous work in Sub-Saharan Africa (Mitchell 2015) and noting that the dog’s closest relatives, the grey wolf (C. lupus) and the coyote (C. latrans), were likewise absent from South and most of Central America in Pre- Columbian times, this paper explores instead the possibility that infectious disease constrained the spread of dogs into Neotropical environments. Four diseases are considered, all likely to be native and/or endemic to South America: canine distemper, canine trypanosomiasis, canine rangeliosis, and canine visceral leishmaniasis caused by infection with Leishmania amazonensis and L. colombiensis. The paper concludes by suggesting ways in which the hypothesis that disease constrained the expansion of dogs into South America can be developed further

Propuesta de producto turístico basado en el perfil del turista, los recursos y atractivos turísticos en San Francisco Cundinamarca

El presente trabajo se genera con base al desarrollo del municipio de San Francisco, Cundinamarca en términos de turismo, donde inicialmente se identifica por medio de revisión documental y trabajo de campo la situación actual del lugar y se genera un diagnóstico del mismo. A partir de lo anterior, el propósito central del documento gira en torno al desarrollo del inventario turístico, así como el conocimiento y definición del perfil de turista que visita San Francisco, con el ánimo de proponer el producto turístico con el mayor potencial para el municipio, lo cual principalmente se logra a través de herramientas de investigación tanto cualitativa como cuantitativa que permiten generar un diagnóstico y posteriormente el alcance del objetivo general.The present work is generated based on the development of the municipality of San Francisco, Cundinamarca in terms of tourism, where the current situation of the place is identified by means of documentary review and field work and a diagnosis of it is generated. Based on the above, the central purpose of the document refers to the development of the tourism inventory, as well as the knowledge and definition of the tourist profile visited by San Francisco, with the aim of proposing the tourist product with the greatest potential for the municipality. , which is mainly achieved through qualitative and quantitative research tools that allow generating a diagnosis and then reaching the general objective

Sistemas integrados existosos : Herramientas para el diseño, implementación y desempeño para organizaciones de ingeniería civil y arquitectura

"Este grupo conformado por dos gerentes socios y dos líderes de sistemas de gestión integrada en organizaciones del sector de la ingeniería civil y la arquitectura, buscan tener una transformación de alto nivel en cabeza de gerentes y líderes a partir del diseño y aplicación de sistemas integrados exitosos en sus organizaciones, enfocados primero en ser conscientes que deben planificar y diseñar una operación acorde a sus objetivos, con base en el conocimiento operativo y logar la gestión por procesos en una información documentada que permita colaboradores que basados en las competencias sean eficientes para la organización..." - Extracto del resumen"This group, made up of two managing partners and two leaders of integrated management systems in organizations in the civil engineering and architecture sector, seeks to have a high-level transformation in the heads of managers and leaders based on the design and application of integrated systems. successful in their organizations, focused first on being aware that they must plan and design an operation according to their objectives, based on operational knowledge and achieve process management in a documented information that allows collaborators based on competencies to be efficient for the organization ... "- Summary of the summaryEspecializaciónEspecialista en Gestión Integrada QHS

Effects of shoulder geometry of tool on microstructure and mechanical properties of friction stir welded joints of AA1100 aluminum alloy

In this work were studied the effects of shoulder geometry of tool on microstructure evolution and mechanical properties of friction stir welded joints of AA1100 aluminum alloy using a milling machine. Three designs of shoulder geometry were evaluated with the aim to induce different distributions of thermal cycles in welding regions. Thermal cycles were measured using thermocouples and a data system acquisition. A microstructural characterization and crystallographic analysis of the welded regions were carried out using optical, scanning electron microscopy, and electron backscattering diffraction. The mechanical properties were measured by transverse tension, guided bend and hardness tests. The weldability behavior was established based on the experimental data. Results showed that the features shoulder tools produced an important effect on the thermal cycles, generating a plasticized wide region and biggest grain size in stir zone when compared with flat shoulder tool