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DIALNET OAI Articles (560,995 recursos)
Dialnet (Difusión de Alertas en la Red) es una plataforma de recursos y servicios documentales, cuyo objetivo fundamental se centra en mejorar la visibilidad y el acceso a la literatura científica hispana a través de Internet.

Tecnologías

Mostrando recursos 1 - 20 de 27,582

1. Estado de la gestión municipal de los residuos sólidos en la provincia de Cartago - Soto Córdoba, Silvia M.; Gaviria Montoya, Lilliana
This paper resumes the principals results obtained by the grant EUROPEAID/126635/M/ACT/CR”, that was realized by FUNDATEC, and whose bene­ficiary was the “Federación de Municipalidades de Cartago, Costa Rica”, the Project received a funding of 74,920 euros. We work with all the Municipalities of the Cartago Province. In addition, we show the results of the interviews of social actors, visits to the recycle sites, visits of municipalities, during the years 2010, 2011 and 2012, and the review of literature. We describe the actual situation of the management of solid waste in Cartago, determinate the gene­ration rates by person and identified the...

2. Definición del proceso de elaboración de una bebida fermentada a partir de pulpa del café (broza) - Arguedas Gamboa, Patricia
Weather and soil conditions of Costa Rica give to the country the possibility of having an economy based in agricultural activities. Coffee had been for centuries the most important crop for economic and social development in Costa Rica. However, international agreements avoid coffee producers to give an attractive added value to the grain. They have to export the product as a dried grain. They get prices that depend of weather con­ditions in other countries that produce coffee. Furthermore the coffee activity produces a big quantity of agricultural residues. It is estimated that every year, around 400 000 tons of pulp...

3. Recurso Hídrico Superficial en la Cuenca del río Tempisque, Costa Rica: Escenarios de Disponibilidad y Demanda - Guzmán-Arias, Isabel
This paper describes the status of water resources availability and demand in the upper and middle Tempisque watershed projected up to 2030 and the proposed actions to start a planning process. The resource availability scenarios incorporate the modifications inwater flows due to land use and cli­mate changes; these combined effects increases the problems of water shortages during the dry season. The resource demand scenarios include projections provided by the major users in the watershed, of which very few can envision growth expectations in terms of water consumption. The proposed resource planning process integrates the analysis conducted in this thesis and...

4. Vigas tipo I para la construcción civil fabricadas con madera de plantaciones de rápido crecimiento en Costa Rica - Tenorio Monge, Carolina; Moya, Róger; Carranza, Mauricio
Recently, the timber market in Costa Rica has been supplied with fast growing trees from forest planta­tions. However, there are some problems relationed to design and development of high technology products. In order to introduce the forest planta­tions woods in the market, the main objective of this study was to determinate the design stress (bending, shear and bending stiffness) from I-beams fabricated with Gmelina arborea wood using lumber for the flanges and 12 mm plywood for web. Three types of profiles were developed (24 cm, 16 cm and 10 cm in high) and two quality types (A and B). The...

5. Comparación de métodos de exposición dermal a plaguicidas en una muestra de floricultores y productores de palmito y chayote en Costa Rica - Medina Escobar, María de Lourdes; Rodríguez Zamora, María Gabriela; Zamora Rodríguez, Paula
Costa Rica exports a wide variety of agricultural products such as chayote, palm hearts, flowers and ferns. Different methods are used for pest control, including chemical based pesticides, even though they could be damaging the farmer’s health. This exploratory study, aimed to compare, in a sample of farmers from each of these crops, three different techniques for dermal exposure assessment: the algorithm quantitative approach method (AQAM), fluorescent tracer and dermal patches. From the algorithmic the intensity levels of exposure were obtained, with fluorescent tracer technique (FTT), deposition of pesticides on workers skin was estima­ted during application and with absorbent patches...

6. Pasos críticos en la estimación de pose en cámara: una evaluación usando la biblioteca LTI-LIB2 - Cabrera Quirós, Laura; Campos Gómez, Rafael; Castro Godínez, Jorge
An evaluation of camera pose estimation methods using a chessboard pattern is presented. Steps evaluated in the estimation process are landmark point detection and camera parameter estimation, due to their critical role in the entire process. The ChESS method and a custom heuristic method are compared for chessboard pattern detection.  Both methods are objectively contrasted using True Positive and False Negative criteria. Meanwhile, Zhang’s method for pose estimation based on planar surface point distribution is used as a first approach, and then refined with a nonlinear regression through the Levenberg-Marquardt algorithm. This pose estimation algorithm is evaluated through a comparison...

7. Evaluación en el agua para consumo humano de subproductos de cloración y su relación como inductores de mutagénesis (mutaciones celulares) - Montero Campos, Virginia; Chinchilla Montero, Rodrigo; Coy Herrera, Ricardo; Agüero Hernández, Ana Laura; Jiménez Antillón, Joaquín
In the chlorination process produces a series of chemical reactions between the chlorine used in the disinfection and the organic matter present in the water to be treated. The nature and concen­tration of the compounds formed, are dependent physicochemical variables of soil organic matter, which react with chlorine added products origina­ting from different compounds, are toxic, mutagenic and carcinogenic including, all together are known as chlorination byproducts (acronym SPD), which include compounds called trihalomethanes (THM’s). It was investigated the presence of these types of products in costa rican waters by the technique of solid phase microextraction (HEADSPACE / SPME Solid...

8. Esferas precolombinas de la zona sur en Costa Rica: cultura y poder en la tecnología de la piedra - De-Simone, Alexandra
This article seeks to articulate a reflection on culture and power, taking as object the Spheres produced by an ancient culture of America, in what is now the southern of Costa Rican territory. In the first part, we describe some of the symbolic dynamics of power in wich these enigmatic objects have been involved: as media spectacle, as a reinforcer of natio­nal identity, as the object of a banana community mobilization, with mention of the institutional pro­blems around archaeological heritage. In the second part, we develop a set of notes for interpretive aesthetic analysis of the spheres, using categories of...

9. Las comunidades de nematodos como indicadores ambientales - Varela Benavides, Ingrid
The use of environmental indicators is a topic of current interest. It allows us to describe the con­dition of an ecosystem and the pressures that is being subject. And at the same time indicate the effectiveness of the mitigation practices. Nematodes are among the organisms that have been studied for their potential as environmental indicators. These animals are cosmopolitan and play an impor­tant role in all ecosystems. Furthermore the nema­tode community predictably changes with the disturbances to the environment. These changes are related to indicators of ecosystems functions. There are taxa indicative of conditions in particular and indices have been...

10. Resultados preliminares de la investigación “Las emprendedoras y los emprendedores en Ciencia y Tecnología en Costa Rica un contraste de realidades de género” - Ferreto-Gutiérrez, Eugenia; Picado Arroyo, Rytha
The project is an investigation that seeks to demons­trate the contrasts of gender entrepreneurship on companies focused in Science and Technology in Costa Rica. By consulting secondary sources and experts on the topic, and deepen the field of Science and Technology. We have found a lack of documented information to take appropriate actions to guide the various actors involved at the level of Government, private sector and academia. In 2010, the Ministry of Economy, Industry and Commerce (MEIC) launches two public policy of promoting SMEs and other enterprises to which state the issue of gender as a crosscutting issue. In...

11. Impacto que genera un proyecto sobre oratoria en estudiantes de primaria de zonas rurales de Cartago - Amador Solano, María Gabriela
This article aims at showing the development and relevance of an extension project in seven rural schools located in “circuito 05” in the central area of Cartago. The main goal is to enhance oral commu­nication in elementary school students. The project was designed as a training workshop for the teach­ers in the chosen schools in order to be taught to students by implementing an oratory club. In each student´s dissertation, the researchers observed the enthusiasm that the project caused in the schools. Objectives, contents, activities, assessment and observations were designed in a didactic plan to be used upon needs of...

12. Razonamiento estratégico que promueve el comportamiento persistente: un enfoque experimental - Torres Carballo, Federico; Sandoval Sánchez, Yarima
This research aims to apply experimental techniques used to study the strategic behavior in games of Hide and Seek, as a framework for representing business situations more realistic and elaborate. To promote strategic thinking and persistence, repeated matching games between strangers are applied, and one with fixed an allocation (down payment decreases each round) with the possibility of abandonment in any round and keeping the rest of the initial allocation. In fact, the strategic reasoning is the diversion of random choices along of repetition and dropout rates of gambling, loss aversion and cultural differences that seem to frame various strategic...

13. Condición actual del mercado del abono orgánico en el cantón de Alvarado, Cartago - Brenes Peralta, Laura; Jiménez Morales, María Fernanda
Market conditions, such as the supply, the demand and the prices, are vital to establish a marketing strategy in any kind of product, and compost should not escape this practice. The idea of creating this study was born due to the Municipalidad de Alvarado´s Solid Waste Management Program. This local government, located in Cartago, Costa Rica has achieved important progress in environmental education, residues classification and separation, and domestic organic residues recycling through composting practices. This last process was initiated by pilot trials, developed by Fabián Marín Rivas, an Agribusiness student from TEC in his Graduation Project. Since the obtained...

14. Dibujando 2D en iOS (Nota técnica) - Hernández Castro, Franklin; Monge Fallas, Jorge
This paper explains basic concepts that are needed to draw in two dimensions in iOS, in other words, to drawing in two dimensions for iPhone and iPads in the programming language Objective-C. This environment offers several alternatives for this purpose and this article covers the generalities necessary to understand which of them are used in each case. It also offers a couple of examples of how to implement some of these possibilities. 

15. Factores críticos en una extensión tecnológica. El caso de Talamanca en el Programa de Regionalización Interuniversitario - Ruiz Fernández, Ana Rosa
This article is aimed at identifying the critical factors that have allowed us to develop the extension socio-productive-technological in the Talamanca indigenous territory with funds of the regionalization program inter-university, administered by the Vice-rectory for Research and Extension. The Academic Model adopted in the III Congress of Institutional Technological Institute of Costa Rica defines and characterizes the extension. An extension designed as a respectful dialog with the national sectors and of mutual feedback whose actions must be based on interdisciplinarity,-institutionality, the communal leadership and academic excellence. Based on this framework and the experience developed from 2007 to 2012 in the Talamanca...

16. Experiencia de producción de lechuga americana (Lactuca sativa) hidropónica, tipo NFT - Brenes Peralta, Laura; Jiménez Morales, María Fernanda
Hydroponics is considered to be the study of plant growth in the absence of soil. Nowadays it is used with commercial purposes in which different plants are set in an environment where a nutrient solution is added so that the plant can grow. NFT is a kind of hydroponic agriculture, that means Nutrient Film Tecnique. There is an established NFT system at the Centro de Prácticas Docentes e Investigación Agropecuaria, from the Agribusiness School at Instituto Tecnológico de Costa Rica. Therefore a research project was started in 2013, to promote this type of Agriculture, and create an experience that resulted...

17. Cultivo in vitro del tomate de árbol (Cyphomandra betacea (Cav.) Sendt. (Fenotipo naranja) proveniente de Costa Rica - Chacón Cerda, Randall; Flores-Mora, Dora; Alvarado Marchena, Luis; Schmidt Durán, Alexander; Alvarado Ulloa, Carlos
Tamarillo or tree tomato (Cyphomandra betacea), is a fruit plant of commercial importance in countries such as Bolivia, Colombia, Ecuador, and Peru, where it is consumed as a fresh or processed fruit. Traditionally, it is grown through seeds or plant cuttings, leading to problems regarding heterogeneity and quality of the planting material. In this research, an in vitro micropropagation protocol was developed for a domestic tree tomato, from Costa Rica, and of the orange phenotype; which has considerable potential for its use in agroindustry and in agricultural diversification. Two different in vitro disinfection treatments were evaluated, with variations of 2,5%...

18. Estudio preliminar del potencial bioactivo de la Annona cherimola (anona) y Prunus domestica (ciruelo) cultivadas en Costa Rica - Navarro Hoyos, Mirtha; Moreira González, Ileana; Arnáez Serrano, Elizabeth; Murillo Masís, Renato; Quesada Mora, Silvia; Zamora Ramírez, William; Cordero Hernández, Meliza
The nutritional and health benefits of bioactive metabolites such as alkaloids, triterpenes and more recently of polyphenols have increased at international level the intake of natural products that constitute potential sources of such compounds as well as the importance of structural characterization in correlation with their bioactivity. The present research involved the study of fruit species Annona cherimola (cherimola) and Prunus domestica (plum) cultivated in Costa Rica due to their traditional use related to their antioxidant potential and also based on results of international studies that demonstrated the health benefits of polyphenols in relation to cardiovascular diseases, anti-inflammatory, anticancer, neuroprotective and...

19. Estructura y composición florística del bosque nuboso de la Isla del Coco - Porras Jiménez, Michael Antonio; Acosta Vargas, Luis Guillermo; Castillo Ugalde, Marvin; Quesada Monge, Ruperto
In Isla del Coco National Park (also known as Cocos Island), on 2012, six Permanent Sample Plots of 2500 m2 were established, near to Cerro Yglesias (630 mosl) and Cerro Pelón (560 mosl), with the aim to characterize the structure and floristic composition of this forest; where humidity and cloudiness developed a type of plant association, considered the cloud forest at lowest altitude in the world, between 300 and 630 musl. All plants with a DBH>5 cm were measured. Also total height, crow position, crow shaped and lianas were recorded. Sixteen plant species were found, six of them are endemic. Species...

20. Conocimiento de la dinámica fluvial como herramienta para la planificación territorial. Caso río Volcán, Buenos Aires, Puntarenas, Costa Rica - Segura Serrano, Laura
Costa Rica has a high water supply and an extensive hydrographic network. Nevertheless studies of ri-vers dynamics are not consider as a tool for decision making in urban planning. This has led to negative consequences on environmental risks. The community of Volcán, Buenos Aires, Puntarenas, Costa Rica wanted to validate the risk map of the National Emergency Comission (CNE) though a technical study. Through the project “Management Plan river basin Volcán” we were able to study the hydraulic response of the river Volcán to different flow data. The study revealed which were the areas with the greatest flood threat. This information is...

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