Browsing Artículos científicos by Title
Now showing items 46-65 of 114
-
Estructura hidrográfica de la bahía de Bluefields, Nicaragua
(Universidad Nacional (Costa Rica), 2009)En marzo y octubre del 2000, entre las actividades del Proyecto DIPAL II (Proyecto para el Desarrollo Integral de la Pesca Artesanal en la Región Autónoma del Atlántico Sur, Nicaragua), se realizaron dos campañas hidrográficas ... -
Estudio experimental de la radiación global ultravioleta en San José, Costa Rica
(Universidad Nacional (Costa Rica), 1996)Se midieron las radiaciones ultravioleta global y solar global en San José, Costa Rica (latitud: 9°56´, longitud: 84°54´, altitud: 1.172m) durante el periodo de octubre 1993 a enero 1995 y se analizaron en función de su ... -
Estudio experimental y teórico de un horno solar práctico en el clima de Costa Rica
(Universidad Nacional (Costa Rica), 1986-01-01)Alrededor del 40% de la población costarricense utiliza leña para cocinar, lo que ha contribuido en buena medida al problema de la deforestación. Esto, junto con otras razones, le dio una idea al autor para diseñar, construir ... -
Estudio preliminar de tres modelos de destiladores solares para producir sal y agua potable
(Universidad Nacional (Costa Rica), 1986-01-01)Hemos construido tres alambiques solares de 0,5-1,0 m 2 de área para producir agua salada y potable, utilizando tecnología local y materiales locales. Hemos estudiado el rendimiento térmico de estos alambiques en función ... -
Evaluación de fuentes tsunamigénicas en el sur de Centroamérica y la generación de mapas de evacuación en la costa Pacífica de Costa Rica
(Geo - Network of Latinomerican - German alumi (GOAL) 7-10 2015, 2015)Costa Rica se encuentra en el extremo oeste de la placa Caribe, en el sur de América Central. En esta región se da la interacción de cuatro placas tectónicas. La placa Cocos se subduce bajo la placa Caribe y la microplaca ... -
Evaluación de la peligrosidad del tsunami de Chile del 16 de setiembre del 2015 para Costa Rica
(Revista Ciencias Marinas y Costeras vo.8 no.1 113-128 2016, 2016)A Mw 8.3 earthquake took place in Chile on September 16th, 2015 causing a local tsunami. As a consequence, this earthquake prompted the National Tsunami Monitoring System (SINAMOT) in Costa Rica to conduct a tsunami hazard ... -
Evaluación del potencial de tsunamis locales con base en análisis sismo-tectónico en el Caribe de Costa Rica
(Universidad de Costa Rica, 2021-04-22)En Costa Rica, pese a su relativa baja frecuencia, los tsunamis suponen un riesgo en las comunidades costeras. La integración de información geofísica y geológica permite la interpretación de posibles áreas de ruptura para ... -
Evaluating SODA for Indo-Pacific Ocean decadal climate variability studies
(Journal of Geophysical Research: Oceans, 2014-10-31)Estimates of changes in upper ocean temperature, heat content, and sea level are dependent on the coverage of subsurface observations in space and time. Historically, these data are sparse, which has limited our understanding ... -
Evaluation of volume change in rectum and bladder during application of image-guided radiotherapy for prostate carcinoma
(AIP Conference Proceedings, 2016-07-07)All prostate cancer patients from Centro Médico Radioterapia Siglo XXI receive Volumetric Modulated Arc Therapy (VMAT). This therapy uses image-guided radiotherapy (IGRT) with the Cone Beam Computed Tomography (CBCT). This ... -
Experimental And Theoretical Analysis Of A Simple Solar Oven In The Climate Of Costa Rica - I
(Elsevier, 1988)Inexpensive and easy to fabricate solar ovens have been made with available materials. One reflector has also been mounted to increase the input radiation on the hot absorbing plate which can be adjusted manually according ... -
Experimental characterization and Monte Carlo simulations of the dose enhancement on the millimeter scale of PAGAT infused with gadolinium
(Elsevier Ltd, 2021-05-03)This study reports on the determination of the K-edge dose enhancement factor achieved in a polymer gel dosimeter based on acrylamide, known as PAGAT, infused with a high concentration of a clinical gadolinium-based compound. ... -
Experimental validation of gallium production and isotope-dependent positron range correction in PET
(Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment vol.814 110-116 2016, 2016-04-01)Positron range (PR) is one of the important factors that limit the spatial resolution of positron emission tomography (PET) preclinical images. Its blurring effect can be corrected to a large extent if the appropriate ... -
Factores que influyen en la forma de la cola de un tsunami
(UNICIENCIA Vol. 23 65-69, 2009)The propagation speed of a tsunami depends on the depth of the ocean in which it propagates. As the tsunami crosses the abyssal plain, it suffers modifications in its form due to change in the depths of the ocean bottom. ... -
Feasibility of dose enhancement assessment: preliminary results by means of Gd-infused polymer gel dosimeter and Monte Carlo study
(Universidad Nacional (Costa Rica), 2018)This work reports the experimental development of an integral Gd-infused dosimeter suitable for Gd dose enhancement assessment along with Monte Carlo simulations applied to determine the dose enhancement by radioactive ... -
First record of Scapholeberis freyi Dumont and Pen- saert, 1983 (Crustacea:Anomopoda: Daphniidae) from Colombia
(Universidad Nacional Mayor de San Marcos, Perú., 2021)From the analysis of plankton samples from a temporary pond of northern Colombia some female specimen of the daphinid cladoceran Scapholeberis freyi Dumont and Pensaert, 1983 was collected. It represents the first report ... -
Graphene flakes obtained by local electro-exfoliation of graphite with a STM tip
(Physical Chemistry Chemical Physics vol.11 no.19 8061-8068 2017, 2017-02-24)Graphite surfaces can be manipulated by several methods to create graphene structures of different shapes and sizes. Scanning tunneling microscopy (STM) can be used to create these structures either through mechanical ... -
Hidrography and river plumes in Golfo Dulce, South Pacific of Costa Rica
(Universidad de Costa Rica, 2015-07)Oceanographic variables at 33 stations distributed in Golfo Dulce, Costa Rica, during the dry and rainy seasons between 2009 and 2010, were analyzed with CTD profiles, where salinity, temperature, sigma-T and currents were ... -
High Specific Capacity of Lithium–Sulfur Batteries with Carbon Black/Chitosan- and Carbon Black/Polyvinylidene Fluoride-Coated Separators
(MDPI, 2022-03-17)In this research, the shuttle effect and the low sulfur activation of lithium–sulfur batteries were mitigated by coating the cathode side of Celgard 2400 separators with mixtures of carbon black/chitosan or carbon ... -
Historical Tsunamis at the Costa Rican Caribbean Coast
(Universidad de Costa Rica, 2021-04-22)Aún cuando los tsunamis son poco frecuentes en el Caribe de Costa Rica, pueden llegar a ser destructivos. En Costa Rica existe la creencia errónea de que no hemos tenido tsunamis. Sin embargo, los autores encontraron ... -
Impact in Costa Rica of the tsunami caused by the Hunga Tonga - Hunga Ha’apai volcano eruption on 15 January 2022
(Springer, 2023-05-12)Hunga Tonga–Hunga Ha’apai had a large eruption (VEI 5–6) on 15 January 2022, which caused a tsunami recorded in all ocean basins. Costa Rica has made many advances in tsunami preparation over the past 9 years since the ...