Browsing Facultad de Ciencias Exactas y Naturales by Title
Now showing items 2530-2549 of 2624
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Understory bat roosts, availability and occupation patterns in a Neotropical rainforest of Costa Rica
(Revista de Biología Tropical, 2016-07-03)The strong link between bats and their roosts is widely recognized as being particularly significant. Despite this, roosting ecology of bats is poorly understood and much of the basic information is still unknown. In this ... -
Unexplored Character Diversity in Onychophora (Velvet Worms): A Comparative Study of Three Peripatid Species
(Sars International Centre for Marine Molecular Biology, Norway, 2012-12-17)Low character variation among onychophoran species has been an obstacle for taxonomic and phylogenetic studies in the past, however we have identified a number of new and informative characters using morphological, molecular, ... -
Uniciencia journal adopts the continuous publication model
(Universidad Nacional (Costa Rica), 2021) -
Unión interuniversitaria para el fortalecimiento de las Olimpiadas Costarricenses de Ciencias Biológicas como proceso de formación de los futuros profesionales en el área de las ciencias y la actualización de los conocimientos de los y las docentes de secundaria sobre biología
(Universidad Estatal a Distancia (UNED) (Costa Rica), 2015-04-28)Las Olimpiadas Costarricenses de Ciencias Biológicas promueven el estudio activo, participativo y significativo de las ciencias biológicas a nivel de la enseñanza media y preuniversitaria y potencian el nivel cognitivo ... -
La unión y formación de poros de las actinoporinas están determinadas por las propiedades fisicoquímicas de la membrana
(Academia de Ciencias de Cuba (Cuba), 2022)Introducción. Las actinoporinas (AP) son proteínas formadoras de poro (PFP) que se asocian a membranas conduciendo a la muerte celular. Sticholysinas I y II (St, StI/II) se encuentran entre las AP más potentes descritas ... -
Unveiling the hidden bat diversity of a neotropical montane forest
(PLOS ONE Vol.11 No.10, 2016-10-05)Mountain environments, characterized by high levels of endemism, are at risk of experiencing significant biodiversity loss due to current trends in global warming. While many acknowledge their importance and vulnerability, ... -
Usage and limitations of free and open-source software in Costa Rican local governments
(IEEE Explore, 2013-10-07)This paper presents results about the use and barriers that face free and open source software in the local governments in Costa Rica. Through an electronic survey, information was gathered from such governments, allowing ... -
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 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, ... -
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 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 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 ... -
Uso alternativo de residuos de caña de azúcar obtención de espumas rígidas de poliuretano
(Universidad Nacional (Costa Rica), 2004)En este trabajo se realizó un estudio para comprobar la efectiva sustitución parcial de los reactivos de uso común en la elaboración de espumas rígidas de poliuretano, por materiales lignocelulósicos provenientes de la ... -
Uso de algunos constructos del modelo de Competencias y Conocimientos Didáctico-Matemático para el estudio de informes de práctica de futuros profesores de matemáticas.
(Comité Interamericano de Educación Matemática, CIAEM, 2019-05)El Modelo de Competencias y Conocimientos Didáctico-Matemático ha permitido el abordaje de problemas de la didáctica de las matemáticas y en particular, el análisis didáctico. El objetivo de este taller es utilizar algunos ... -
Uso de argumentación y analogías en los procesos de preparación para las Olimpiadas Internacionales de Biología y sus aportes a la promoción de competencias de pensamiento científico en estudiantes costarricenses
(Universidad Nacional (Costa Rica), 2020-01)La presente investigación tiene como propósito identificar las competencias de pensamiento científico, como la argumentación y el uso de analogías, fomentadas en el estudiantado costarricense participante en las Olimpiadas ...