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Comparison of steel stirrup and GFRP stirrup with specific reference to structural feasibility, self-weight,and cost using ‘Ansys’ software.
Full text linkTo get in collaboration with modern infrastructure; various research studies indicate for sustainable replacement of steel rebar with glass fibre reinforced polymer (GFRP) rebars. In standard column, share of steel is up to 8%. The steel reinforced structures create problems such as handling of steel, transportation, self-weight of steel, and importantly its cost whereas GFRP rebar has properties like high strength, corrosion resistance, durability, and light weight & cost effective in nature. This research paper enhances replacing the steel stirrups in Column with GFRP stirrups, investigates the feasibility through structural behaviour using ANSYS Software, checks reduction of self-weight & Cost and is ultimately targeted to light weight structures or floating offshore structures.
To check the feasibility of replacement, reduction of self-weight and cost, this research is divided into three stages. In first and second stage, it shows selection of GFRP as replacement material and structural feasibility. In further stage, it shows comparison between square, rectangular and circular column having conventional reinforcement, Semi GFRP and full GFRP reinforcement, to check effective self-weight and cost reduction.
When Conventional Column compared with Semi GFRP and full GFRP reinforced column, effective reduction showed in full GFRP column and self-weight reduced up to 6 % and cost decreased by 42%. The effective reduction percentage was noticed in rectangular column as compared to other shapes where slightly less reduction is observed
NDVI and NDMI indices based land use and land cover change analysis of Charaideu District, Assam, India.
Full text linkA transformation of natural environment to man-made environment causes Land use and Land cover change (LULC). These changes have been taking place due to human’s unethical uses of natural resources. Remote Sensing and GIS are the essential techniques to identify land use land cover change in an area. Normalized Difference Vegetation Index (NDVI) and Normalized Difference Moisture Index (NDMI) indices have been used to study the Land use changes in Charaideu District. The objectives of this paper are to analyse the spatio-temporal LULC, NDVI and NDMI changes and the impact of LULC change in NDVI and NDMI. Three multi-temporal satellite imageries for the years 1995, 2010, and 2020 were acquired from the United States Geological Survey website to meet the study's aims.The supervised classification method has been applied to prepare land use and land cover maps using Maximum Likelihood Algorithm and also the NDVI and NDMI maps for depicting vegetation pattern and moisture condition of the study area. It is revealed from the study that the areas under built-up land and agricultural hand have been increasing during the period 1995-2020. On the other hand, area under dense vegetation has decreased due to increasing population which leads to changes in vegetation pattern and moisture condition in the study area
Keywords: Land use land cover, Remote sensing, Normalized Difference Vegetation Index, Normalized Difference Moisture Index, Supervised classification, Maximum likelihood algorith
Climate Change Impact on Insect Pest Prevalence and Sustainable Adaptation Strategies for their Management
Full text linkClimate change has a pronounced impact on agriculture. A pan-India study on climate change impact on insect pest prevalence was conducted on paddy, cotton, pulses, wheat, mustard and barley cultivating marginalized farmers (n=280). The systematic random sampling methodology was adopted for sample population identification. A specially designed, developed and field tested questionnaire was used to elicit the information from the respondent. The findings revealed that during the crop growth stage insect pest prevalence has increased, new types of insects affecting the crops, more weed growth affecting the crops, and the cost of insecticides and pesticides use has increased several folds. To manage these insect pests, synthetic insecticides and pesticides are used which have the number of disadvantages associated with them. To overcome these, sustainable adaptation strategies for insect pest management are identified from the literature and are described in this paper. These strategies include intercropping, poly-culture, cover crop, rice-fish agriculture system, organic mulches, bio-fumigation, trap cropping etc. Farmers’ awareness, training, and workshops are required for the dissemination of these strategies for insect pest management for transforming subsistence farming into sustainable farming
Rainfall Variability Analysis of Jodhpur Tehsil, Jodhpur, Rajasthan, India
Full text linkRainfall in India shows remarkable temporal and spatial variations. This characteristic affects the ground water levels and water levels of surface water bodies as well. This paper attempts to map and analyse the rainfall patterns of 30 years for Jodhpur tehsil by calculating the rainfall deviation with an intent to understand the impact on water logging and availability of water in the region
Conservacionismo internacional y problemas locales: las investigaciones sobre pingüinos en la Patagonia
Full text linkIn Argentina, until the 1970s, Magellanic penguins were investigated by local scientists as species of "commercial interest." A short time later, the situation changed drastically: penguins became a threatened species that needed to be conserved. This article investigates the role of the Wildlife Conservation Society (WCS), one of the largest NGOs in the world, in changing the way of problematizing, investigating and intervening penguins. Through the case study, I dialogue with various studies that investigate the “neocolonizing” effects of the internationalization of conservation-oriented research in Latin America, as a peripheral region. I argue with these studies insofar as they only observe that international cooperation tends to make invisible, subordinate and control local ways of thinking and intervene on nature. Instead, I propose that international cooperation also allows global recentralization of research from peripheral territories. To do this, I investigate three aspects of research on penguins: a) how it was positioned, from Patagonia, as an indicator of climate change as a global problem, b) how the diversification of international scientific funding allowed the development of innovative research for the field of conservation of penguins, c) how the conservation movement allowed the Patagonian coast to be positioned as a world center for wildlife-based tourism. This research uses various qualitative methodologies based on interviews, field observations, institutional documents, researcher curricula, and funding data from Web of Science.En Argentina, hasta la década de 1970, los pingüinos de Magallanes fueron investigados por científicos locales como especies de “interés comercial.” Poco tiempo después, la situación cambió drásticamente: los pingüinos pasaron a ser una especie “amenazada” que era necesario conservar. El presente artículo indaga el rol de Wildlife Conservation Society (WCS), una de las ONGs más grandes del mundo, en el cambio de la forma de problematizar, investigar e intervenir sobre los pingüinos. A través del caso de estudio, dialogo con diversos estudios que indagan los efectos “neocolonizadores” de la internacionalización de las investigaciones orientadas a conservación en América Latina, en tanto región periférica. Discuto con estos estudios ya que solo observan que la cooperación internacional tiende a invisibilizar, subordinar y controlar las formas locales de pensar e intervenir sobre la naturaleza. Propongo, en cambio, que la cooperación internacional también permite recentralizar a nivel global las investigaciones desde territorios periféricos. Para ello, indago tres aspectos de las investigaciones sobre pingüinos: a) cómo fue posicionado desde la Patagonia como indicador del cambio climático como problemática global, b) cómo la diversificación del financiamiento científico internacional permitió el desarrollo de investigaciones novedosas para el campo de la conservación de pingüinos, c) cómo el movimiento conservacionista permitió posicionar al litoral patagónico como un centro mundial del turismo basado en fauna. La investigación utiliza diversas metodologías cualitativas en base a entrevistas, observaciones de campo, documentos institucionales, curriculums de investigadores y datos sobre financiamiento extraídos de Web of Science
Contrarrevolución en las fronteras. El liderazgo de los hermanos Pincheira en la guerrilla del Sur americano (1818-1832). Carla Manara. (2021) Prohistoria, Rosario, Argentina.
Full text linkLo Sociocultural en la Optica de la Producción Científica y Tecnológica Regional: Una Lectura Crítica
No full textLas reflexiones que en el presente texto se elaboran son resultado de un proceso de investigación que busca develar la interacción existente entre ciencia, tecnología y sociedad en el escenario sociocultural de la IXRegión de la Araucania, Chile. El análisis de la imagen y el tipo de relación que las producciones cientrjiicas establecen con la realidad sociocultural regional marcan los objetivos del estudio. Algunos insumos de orden cuantitativo que consideramos, ilustrativos en relación a la lógica e intencionalidad de los proyectos de investigación e innovación tecnológica ejecutados, sirven de base para indagar en tomo a cómo se configura lo sociocultural desde la racionalidad científica. El estudio se ha centrado en los proyectos FONDECYT Y FONDEF desde 1994 (existen otros "actores" que se abocan aldesarrollo científico en la región), ya que éstos representan la mayor producción y más legitima desde el discurso de la ciencia normal como ciencia oficial a nivel de desarrollo científico e innovación tecnológica. Las interpretaciones construidas tienen como referente teórico principal los Estudios Sociales de Ciencia y Tecnologia, apoyándose igualmente en consideraciones provenientes de la Filosofía de la Ciencia y el Análisis Sociocultural
Mapuches en la mira de las racionalidades políticas
No full textEn este ariícuio exploramos las perspectivas de la utiiización de los conceptos de poder y dominación de Michel Foucault aplicándolos a la relaciones inter-étnicas entre los mapuche y los conquistadores españoles y el Estado chileno respectivamente. No sólo fijándonos en la diferencia entre el poder soberano y el poder disciplinario proponemos abrir la discusión con el concepto foucauldiano de la gubernamentalidad hacía múltiples formaciones de poder históricas-espaciales. En este sentido podemos distinguir las formaciones siguientes según sus racionalidades políticas: poder soberano, poder pastoral y razón del Estado, la comunidad pura, la sociedad disciplinada, gubernamentalidad neoliberal
Juan Luis Carrellán (Editor). La Guerra Civil Española: Estudios y reflexiones desde Chile. Santiago, Bicentenario, 2018
Full text linkReseña del Libro:Juan Luis Carrellán (Editor). La Guerra Civil Española: Estudios y reflexiones desde Chile. Santiago, Bicentenario, 2018