Caracterización de las propiedades mecánicas de materiales compuestos elaborados a partir de residuos industriales

CD-T 676.289 G16;86 p.La investigación consiste en ensayar probetas elaboradas a base de lodo papelero, adicionando en diferentes porcentajes yeso, cemento y arcilla; comparando los resultados obtenidos en pruebas de compresión y absorción de agua, bajo distintas condiciones de humedad y tiempo de curado de 28 días.Universidad Libre Seccional Pereir

Above- and below-ground trait coordination in tree seedlings depend on the most limiting resource: a test comparing a wet and a dry tropical forest in Mexico

The study of above- and below-ground organ plant coordination is crucial for understanding the biophysical constraints and trade-offs involved in species’ performance under different environmental conditions. Environmental stress is expected to increase constraints on species trait combinations, resulting in stronger coordination among the organs involved in the acquisition and processing of the most limiting resource. To test this hypothesis, we compared the coordination of trait combinations in 94 tree seedling species from two tropical forest systems in Mexico: dry and moist. In general, we expected that the water limitation experienced by dry forest species would result in stronger leaf-stem-root coordination than light limitation experienced by moist forest species. Using multiple correlations analyses and tools derived from network theory, we found similar functional trait coordination between forests. However, the most important traits differed between the forest types. While in the dry forest the most central traits were all related to water storage (leaf and stem water content and root thickness), in the moist forest they were related to the capacity to store water in leaves (leaf water content), root efficiency to capture resources (specific root length), and stem toughness (wood density). Our findings indicate that there is a shift in the relative importance of mechanisms to face the most limiting resource in contrasting tropical forests

Guía de Curso PISE DM 2020-3

El Proyecto Integrador de Semestre (PISE) como estrategia pedagógica institucional, ha permitido fomentar en el programa de Diseño de Modas la investigación formativa a partir de diferentes temáticas universales, para hacer un descubrimiento y reconocimiento a aquellos saberes que puedan aportarle al proceso creativo de sus estudiantes, propiciando la innovación. La guía de trabajo 2020-3 presenta los resultados de este semestre como experiencias significativas obtenidas a partir de la investigación-creación, el ABP (aprendizaje basado en proyectos) y el Modelo de Aprendizaje Aumentado Areandina, para compartirlos con la comunidad académica. El tema general de investigación se orientó hacia “Reconquistar nuestro proceso creativo”; a través de un ejercicio de observación y análisis sobre los siguientes hechos: los enigmas de la naturaleza y la regeneración de ciertos animales que han sido tema de estudio para la ciencia y el diseño; el legado y técnica de los tejidos ancestrales que forman parte de una cultura especifica; el simbolismo de la literatura en el mundo y que se ha revitalizado en el tiempo; el desafío que realiza la arquitectura al renovarse manteniendo la esencia de sus edificaciones; la reinvención y sensualidad de las artes en el Renacimiento y finalmente el estudio de aquellas marcas y diseñadores que han evolucionado y mantienen su impronta; temas fundamentales y un reto para los jóvenes creadores de Areandina. El reconocimiento a las directivas, docentes y estudiantes por las entregas finales de los proyectos que se desarrollaron satisfactoriamente desde la didáctica, en tiempos de cambios abruptos por la contingencia de salubridad mundial

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear understanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5,6,7 vast areas of the tropics remain understudied.8,9,10,11 In the American tropics, Amazonia stands out as the world's most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepresented in biodiversity databases.13,14,15 To worsen this situation, human-induced modifications16,17 may eliminate pieces of the Amazon's biodiversity puzzle before we can use them to understand how ecological communities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple organism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region's vulnerability to environmental change. 15%–18% of the most neglected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lost

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear understanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5,6,7 vast areas of the tropics remain understudied.8,9,10,11 In the American tropics, Amazonia stands out as the world's most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepresented in biodiversity databases.13,14,15 To worsen this situation, human-induced modifications16,17 may eliminate pieces of the Amazon's biodiversity puzzle before we can use them to understand how ecological communities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple organism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region's vulnerability to environmental change. 15%–18% of the most neglected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lost

Evaluación de la predación de semillas en la región del embalse de Chisacá, Usme, Cundinamarca (Colombia)

Se evaluaron las tasas de predación post-dispersión de semillas de seis especies nativas: Lupinus bogotensis (Fabaceae), Hesperomeles goudotiana (Rosaceae), Phytolacca bogotensis (Phytolaccaceae), Solanum oblongifolium (Solananceae), Vallea stipularis (Elaeocarpaceae) y Salpichroa tristis (Solanaceae), en tres hábitats (corredor ripariopotrerizado, plantación de coníferas y matorral), y sobre diferentes sustratos (arena, suelo con vegetación y suelo sin vegetación), en sectores aledaños al embalse de Chisacá (Usme, Cundinamarca, Colombia). Se presentó una relación entre la proporción de semillas predadas y su tamaño, siendo las semillas de menor tamaño (S.  tristis, V. stipularis y P. bogotensis) las más predadas. Se presentaron diferencias significativas en las tasas de predación comparadas entre especies (F=78,91;

Estrategias de intervención más usadas en el afrontamiento de duelo materno por pérdida perinatal

El presente artículo expone conceptos clave relacionados a la muerte perinatal y las estrategias de intervención más usadas en el afrontamiento de duelo materno, lo anterior se llevó a cabo con una búsqueda bibliográfica realizada a nivel nacional e internacional, encontrando inicialmente que la mortalidad perinatal se define como las muertes ocurridas desde la semana 22 de gestación, hasta los primeros 7 días del nacimiento; el objetivo es mencionar las estrategias de intervención más usadas en el afrontamiento de duelo materno cuando se produce pérdida perinatal, a través del método investigativo, donde se realiza una búsqueda en bases de datos como Mendeley, Dialnet, E-libro, Proquest, Redalyc.org y repositorio de la Universidad Cooperativa de Colombia entre otras, las cuales permiten acercarse al tema de la investigación consiguiendo afianzar y apropiar conceptos. Durante el desarrollo de la investigación se logró evidenciar las diferentes estrategias de intervención que se manejan cuando existe una perdida perinatal, encontrando inicialmente que el duelo materno que atraviesa cada persona es diferente y por ello la estrategia de intervención se debe plantear a partir de esta singularidad, de allí no existe una estrategia estándar; no obstante durante la revisión bibliográfica se identificó en tres de los artículos revisados emitidos en España, que una de las estrategias más usadas para este tipo de duelo es el ritual de la caja de recuerdos. Y se concluye que hay pocas investigaciones en cuanto al afrontamiento del duelo materno en Colombia, dejando como evidencia que hacen falta más protocolos de atención.This article exposes key concepts related to perinatal death and the most used intervention strategies in coping with maternal grief, it was carried out throughout a national and international bibliographic search, finding that perinatal mortality is defined such as deaths that occurred from the 22nd week of gestation to the first 7 days of birth; the objective of this research Project is is to mention the most used intervention strategies in coping with maternal grief when perinatal loss occurs, using the research method, in which,the search is made in different databases such as Mendeley, Dialnet, E-book, Proquest, Redalyc. Org, the repository of the Universidad Cooperativa de Colombia, among others; this strategie allow us to bring near the theme of the research and the appropriation of concepts During the development of the research, it was possible to demonstrate the different intervention strategies that are handled when there is a perinatal loss, finding first that people face the maternal grief in different ways and for this reason the intervention strategy should be proposed based on this uniqueness Hence, there is no exist a standard strategy; however, during the bibliographic review, it was identified in three of the reviewed articles issued in Spain, that one of the most used strategies for this type of mourning is the ritual of the memory box. And it is concluded that there is little research regarding coping with maternal grief in Colombia, leaving as evidence that it’s necessary to create more and effective care protocols.Resumen. -- Abstract. -- Introducción. -- Objetivo general. -- Marco Teórico. -- Mortalidad Perinatal. -- El Duelo. -- Etapas del duelo. -- Negación. -- La Ira. -- Negociación. -- La Depresión. -- Aceptación. -- Proceso del duelo. -- Aspectos clínicos específicos del duelo perinatal. -- Fases y protocolo duelo perinatal en España. -- Después de comunicar la noticia. -- Dentro del ámbito sanitario. -- Fuera del ámbito sanitario. -- Apoyo ante la muerte del bebé. -- Estrategias de intervención más usadas en el afrontamiento de duelo materno por pérdida perinatal. -- Aceptación y compromiso. -- Dialogo socrático. -- Intención paradójica. -- Mindfulness para duelo. -- Metodología. -- Resultados. -- Conclusiones. -- Reflexiones y Sugerencias. -- Bibliografí[email protected]@[email protected]