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Now showing items 13221-13240 of 13648
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Usando la red de estaciones SIRGAS de Costa Rica para la cuantificación de las discrepancias respecto de un procesamiento PPP en línea
(Universidad Nacional (Costa Rica), 2017-02)Se cuantificaron las discrepancias en las coordenadas geocéntricas [X,Y,Z] obtenidas entre soluciones GPS procesadas en línea con el software del Canadian Space Reference System (CSRS) bajo la modalidad de Posicionamiento ... -
Use and perception of open source by students of the national university in non IT careers
(Institute of Electrical and Electronics Engineers Inc., 2019-08-20)This paper discloses some initiatives that have been carried out by the National University with open source and an exploratory study of the use and perception of a part of the students of the National University that are ... -
Use and Perception of Open Source by Students of the National University in non IT Careers
(Instituto of Electrical and Electronica Engineers (IEEE), 2019)This paper discloses some initiatives that have been carried out by the National University with open source and an exploratory study of the use and perception of a part of the students of the National University that are ... -
Use of cholinesterase activity as a biomarker of pesticide exposure used on Costa Rican banana plantations in the native tropical fish Astyanax aeneus (Günther, 1860)
(Journal of Environmental Biology, 2014-01)In Costa Rica, thousands of tones of agricultural pesticides have been used for decades and their use is continuously increasing due to intensive and expanding production of coffee, pineapple, rice, ornamental plants and ... -
Use of food and spatial resources by two frogs of the genus Dendropsophus (anura: Hylidae) from La Selva, Costa Rica
(Universidade de Sao Paulo, 2012-06)Differences in the use of resources by similar species have been related to a reduction in the interspecific competition that allows coexistence. Also, other factors, such as high availability of resources in the environment, ... -
Usefulness of the working conditions and health survey in central America in prevention. Author response to comments by Jensen
(BMJ Publishing Group, 2015-06-05)We appreciate Dr Jensen's comments1 on the Central American Survey on Working Conditions and Health (ECCTS)2 and his concern that our sampling methodology may have produced biased results. The ECCTS has broadly followed ... -
USEWRITE: Useful Writing Techniques to Improve High-School Students' Descriptive Writing
(Editorial Universidad Nacional, 2010-05-30)Se analizan y recomiendan algunas técnicas de redacción, para promover la escritura de párrafos descriptivos, entre estudiantes de secundaria o principiantes. El estudio parte de los resultados obtenidos en una investigación ... -
Using authentic materials for teaching reading comprehension in a meaningful way
(Universidad Nacional, Costa Rica, 2013)La elección de materiales es una tarea difícil y los profesores deben conocer muchos aspectos antes de elegir material específico para sus alumnos. Por ejemplo, si el nivel es apropiado, las actividades significativas, el ... -
Using authentic materials to teach reading comprehension
(2012-11-09) -
Using Authentic Readings in the Ninth Grade in the Public School System of Costa Rica, to Develop EFL Classroom Activities to Enhance Students Competence
(Universidad Nacional, Costa Rica, 2006)Tomando en consideración los cambios emanados de la Asesoría Nacional de Inglés en el año 1991, del Ministerio de Educación Pública, donde se institucionaliza la utilización del enfoque comunicativo en la enseñanza ... -
Using Flashcards as a Didactic Resource for Teaching Statistics: The Experience in a Particular Didactics Course
(Universidad Estatal a Distancia, 2024-01-01)The aim of the systematization was to create a collection of cards by a group of students. These cards would serve as a didactic resource in teaching statistical or probabilistic concepts in the Costa Rican secondary education ... -
Using Flashcards as a Didactic Resource for Teaching Statistics: The Experience in a Particular Didactics Course
(Universidad Estatal a Distancia, 2024)The aim of the systematization was to create a collection of cards by a group of students. These cards would serve as a didactic resource in teaching statistical or probabilistic concepts in the Costa Rican secondary education ... -
Using interary ECPA (Interactive-Literary English Consonant Pronunciation Activities) to improve the comprehensibility in the pronunciation of english consonant sounds in a group of senior citizens from the gerontology program at UNED: a research study
(Universidad Nacional, Costa Rica, 2015)This research project is aimed at exploring to which extent Interary ECPA (Interactive-Literary English Consonant Pronunciation Activities) improved the pronunciation comprehensibility of older learners. The study was ... -
Using Sniffer4D and SnifferV portable gas detectors for UAS monitoring of degassing at the Turrialba Volcano Costa Rica
(Advanced UAV, 2023)Since the completion of the first Sniffer UAS payload research article titled; Using UAS with Sniffer4D Payload to Document Volcanic Gas Emissions for Volcanic Surveillance: In this study the UAS system deployed carried ... -
Using songs to improve EFL students' pronunciation
(2012-11-09) -
Using the sulfide replacement petrology in lunar breccia 67915 to construct a thermodynamic model of S-bearing fluid in the lunar crust
(Elsevier, 2015-12-15)In this work, we investigate the compositions and origin of metasomatic fluids responsible for the formation of sulfide replacement textures in Mg-Suite lithologies of lunar samples 67915-149 and 67915-150. We have constructed ... -
Using UAS for monitoring the summit of the Arenal Volcano Costa Rica
(Mersin Üniversitesi (Turquía), 2023)The Arenal summit is seldom studied for several reasons. First, the eruptive activity has stopped since October 2010, second the active summit crater C is difficult to reach due to an intense steep climb through the tropical ... -
Using UAS with Sniffer4D payload to document volcanic gas emissions for volcanic surveillance
(Advanced UAV, 2022)A consistent volcanic monitoring program is crucial to the safety of the population and the efficiency of the nation. Costa Rica´s National Commission for Risk Prevention the CNE helps manage this responsibility. The ... -
Using visible-near-infrared spectroscopy to classify lichens at a Neotropical Dry Forest
(Elsevier B.V., 2020-04)The optical properties of lichens have been traditionally explored in the context of geological mapping where the encrustation of lichens on rocks may influence the detection of minerals of interest. As of today, few studies ... -
Uso alternativo de excedentes agroindustriales en la formulación de fertilizantes orgánicos foliares
(Universidad Nacional (Costa Rica), 2003)Debido a la reciente demanda de alimentos a nivel mundial provocado por la explosión demográfica que ha dado en las últimas décadas, la calidad de plaguicidas y fertilizantes químicos empleados ha aumentado a un ritmo ...