Now showing items 47-66 of 82

    • Hidrography and river plumes in Golfo Dulce, South Pacific of Costa Rica 

      Rincón - Alejos, Fernando; Ballestero Sakson, Daniel (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 

      Paniagua-Vásquez, Isaac; Zuluaga-Gómez, Claudia; Chacón-Vargas, Sofía; León, Allan; Sáenz-Arce, Giovanni; Katiyar, Ram; Saavedra-Arias, José (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 

      Chacon-Barrantes, Silvia; Murillo Gutiérrez, Anthony; Rivera Cerdas, Fabio (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 ...
    • Importancia de la batimetría de las planicies abisales en la propagación de tsunamis transoceánicos 

      Chacon-Barrantes, Silvia (Ciencia y tecnología Vol.25,No.1-2 22-33, 2007)
      The initial form of a tsunami originated by an homogeneous seismic source consists on a simple wave front. While the tsunami propagates in deep water, this simple form suffers several modifications ...
    • Influence of the Madden–Julian oscillation on Costa Rican mid-summer drought timing 

      Zhao, Zijie; Oliver, Eric; Ballestero, Daniel; Vargas-Hernández , José Mauro (John Wiley and Sons Ltd, 2019)
      The Central American mid-summer drought (MSD) is the decline of precipitation during the middle of the wet season (July and August) over Central America and southern Mexico. It affects agriculture and favours the initiation ...
    • Infragravity wave energy partitioning in the surf zone in response to wind-sea and swell forcing 

      Contardo, Stephanie; Symonds, Graham; Segura, Laura E; Lowe, Ryan; Hansen, Jeff (MDPI AG, 2019)
      An alongshore array of pressure sensors and a cross-shore array of current velocity and pressure sensors were deployed on a barred beach in southwestern Australia to estimate the relative response of edge waves and leaky ...
    • Las masas de agua del océano Pacifico Tropical frente a Costa Rica (ING) 

      Muñoz Brenes, Carlos L. (Universidad Nacional (Costa Rica), 1984-07-01)
      Utilizando datos de la Expedición EASTROPAC, se estudiaron las principales masas de agua presentes en el Océano Pacifico Tropical frente a Costa Rica. Fueron encontradas el agua superficial tropical (AST), el agua superficial ...
    • Medidas topográficas en superficies atómicamente planas en condiciones ambiente mediante un microscopio de efecto túnel, un enfoque didáctico 

      Delgado Jiménez, Lilliana; Chacón-Vargas, Sofía; Sabater-Piqueres, Carlos; Sáenz-Arce, Giovanni (Universidad Nacional de Costa Rica, 2019-01-31)
      Uno de los grandes avances en la nanotecnología fue el desarrollo del microscopio de efecto túnel, herramienta que ha permitido poder manipular átomos, moléculas, estudiar el transporte electrónico en un solo átomo e incluso ...
    • Metodología para la Evaluación de Rutas de Evacuación en caso de Tsunami Aplicado a la Costa del Pacífico Norte y Central de Costa Rica 

      Rivera, Fabio; Arozarena Llopis, Isabel; Chacon-Barrantes, Silvia; Barrantes Castillo, Gustavo (Revista en Torno a la Prevención no.16 17-26 2016, 2016)
      Se ha diseñado un método con el objetivo de elaborar una cartografía de rutas de evacuación en caso de tsunami a escala 1:10.000, basado en las directrices establecidas por la Comisión Europea. Las áreas de estudio son las ...
    • Modeling a tsunami from the Nicoya, Costa Rica, seismic gap and its potential impact in Puntarenas 

      Chacon-Barrantes, Silvia; Protti, Marino (Journal of South American Earth Sciences .Vol.31 No.4 372-382, 2011)
      Although subduction zones around the world are known to be the source of earthquakes and/or tsunamis, not all segments of these plate boundaries generate destructive earthquakes and catastrophic tsunamis. Costa Rica, in ...
    • Multiparticle emission in the decay of Ar 31 

      Koldste, G.T.; Blank, B.; Borge, M.J.G.; Briz, J.A.; Carmona-Gallardo, M.; Fraile, L.M.; Fynbo, H.O.U.; Giovinazzo, J.; Grann, B.D.; Johansen, J.G.; Jokinen, A.; Jonson, B.; Kurturkian-Nieto, T.; Kusk, J.H.; Nilsson, T.; Perea, A.; Pesudo, V.; Picado, Esteban; Riisager, K.; Saastamoinen, A.; Tengblad, O.; Thomas, J.C.; Van del Walle, J. (American Physical Society, 2014-06-25)
      A multihit capacity setup was used to study the decay of the dripline nucleus 31Ar, produced at the ISOLDE facility at CERN. A spectroscopic analysis of the β-delayed three-proton decay of 31Ar is presented for the first ...
    • Nations work together to size up Caribbean tsunami hazards 

      Lopez-Venegas, Alberto; Chacon-Barrantes, Silvia; Zamora, Natalia; Macías - Sánchez, Jorge (AGU.ORG, 2018-10-04)
      El Caribe es conocido por sus playas tropicales y centros de surf, pero no está exento de terremotos y tsunamis. Durante los últimos 500 años, esta región puede haber estado expuesta a aproximadamente 100 tsunamis, de los ...
    • Numerical Simulations of the 1991 Limón Tsunami, Costa Rica Caribbean Coast 

      Chacon-Barrantes, Silvia; Zamora, Natalia (Pure and Applied Geophysics vol.174 2945-2959 2017, 2017)
      The second largest recorded tsunami along the Caribbean margin of Central America occurred 25 years ago. On April 22nd, 1991, an earthquake with magnitude Mw 7.6 ruptured along the thrust faults that form the North Panama ...
    • Polycrystalline indium films in the percolation threshold regime: Time correlation between electric conduction and optical properties with film morphology 

      Clark, Neville; Vargas, William E.; Azofeifa, Daniel E.; Sáenz-Arce, Giovanni; Solís, Hugo; Ramírez Hidalgo, Gustavo (IOP Publishing Ltd., 2014-02-21)
      Polycrystalline indium films have been deposited at room temperature by electron beam evaporation on amorphous quartz substrates. Once deposited, electrical resistance and specular reflection of the films, for wavelengths ...
    • Polymer gel dosimeter based on itaconic acid 

      Mattea, Facundo; Chacón, David; Vedelago, José; Valente, Mauro; Strumia, Miriam (2015-11)
      A new polymeric dosimeter based on itaconic acid and N, N'-methylenebisacrylamide was studied. The preparation method, compositions of monomer and crosslinking agent and the presence of oxygen in the dosimetric system were ...
    • Properties of low-lying states in 65Co from lifetime measurements 

      Olaizola, Bruno; Fraile, L. M.; Mach, H.; Nowacki, F.; Poves, A.; Aprahamian, A.; Briz, Jose Antonio; Cal-Gonzalez, Jacobo; Ghita, D.; Köster, U.; Kurcewicz, W.; Lesher, S. R.; Pauwels, D.; Picado, Esteban; Radulov, D.; Simpson, G. S.; Udias, Jose (American Physical Society, 2019)
      The low-energy structure of Co65 was studied by means of γ-and fast-timing spectroscopy at the ISOLDE/CERN facility. The known level scheme of Co65 populated following the β-decay of Fe65 was expanded. The experimental ...
    • Raman spectroscopy as a tool to evaluate oxygen effects on the response of polymer gel dosimetry 

      Chacón Obando, David M; Vedelago, J; Strumia, M.C; Valente, M; Mattea, F. (Elsevier, 2019-05-06)
      Currently, advanced dosimeters like polymer gels are capable of obtaining reliable and accurate 3D dose distributions from correlations with the different polymerization degrees induced by incident radiation. Samples of ...
    • Rasgos hidrográficos y batimétricos del Refugio Nacional de Vida Silvestre Ostional y áreas adyacentes, Guanacaste, Costa Rica 

      Brenes Rodríguez, Carlos L.; Márquez-Artavia, Amaru; Quirós, Warner; BENAVIDES, ROSARIO (Universidad Nacional (Costa Rica), 2012-12)
      Entre el 6 y el 11 de febrero del 2012, se realizó un levantamiento hidrográfico y batimétrico en la región situada entre Punta Guiones y Cuajiniquil, en el Pacífico norte de Costa Rica. Las temperaturas superficiales se ...
    • Reverse circulation in Bahía Santa Elena, North Pacific of Costa Rica 

      Tisseaux Navarro, Alexandre; Salazar Ceciliano, Juan Pablo; Cambronero Solano, Sergio; Vargas-Hernández , José Mauro ; Márquez-Artavia, Xiomara (Elsevier B.V., 2021-02-10)
      This work describes the water circulation of Bahía Santa Elena using velocity fields and hydrographic data obtained from a ship-mounted Acoustic Doppler Current Profiler and a vertical profiler Conductivity–Temperature–Depth ...
    • Rotating magnetic shallow water waves and instabilities in a sphere 

      Márquez-Artavia, Xiomara; Jones, Christopher; Tobias, Steven (University of Leeds, United Kingdom, 2017)
      Waves in a thin layer on a rotating sphere are studied. The effect of a toroidal magnetic field is considered, using the shallow water ideal MHD equations. The work is motivated by suggestions that there is a stably ...