317,900 research outputs found
r-costa/sbml2hyb: v1.0.1
No full texta tool to automatically convert models between HMOD files and SBML forma
Tipos de orquidáceas brenesianas, descritas por R. Schlechter, en el Herbario Nacional de Costa Rica
No full textEsta nota revela la existencia, en el Herbario Nacional de Costa Rica (CR), de siete tipos de orquídeas brenesianas descritas por R. Schlechter, que no habían sido comunicados previamente. This note informs about the presence of seven Brenesian orchid types, described by R. Schlechter, in the Herbario Nacional de Costa Rica (CR) type collection, whose existence was unknown.
Innovation, R&D and Productivity in the Costa Rican ICT Sector: A Case Study
No full textThis paper addresses the relationships between innovation, research and development (R&D) and productivity in domestic ICT firms in Costa Rica. Factors considered were the types of innovation outputs produced by domestic ICT firms, the relative importance of innovation inputs, the impacts of innovation on firm productivity, the protection of innovations, and impediments to innovation. While most firms engaged in all types of output and input innovations, they appear to be driven by retaining or increasing market share rather than increasing productivity. Half of firms do not formally protect the intellectual property created by their innovations, are not familiar with methods for protecting innovation or the availability of government grants for such purposes, and face barriers associated with the Costa Rican Patent Office. Other impediments include lack of knowledge about financial resources available and scarcity of human resources. There is also evidence of knowledge spillovers through worker mobility from multinationals operating in Costa Rica to domestic ICT firms.Research and development, Information communications technology, Innovation, Costa Rica
Catálogo revisado y anotado de las Orchidaceae de Costa Rica
No full textSe presenta una compilación actualizada de todas las especies de orquídeas (Orchidaceae) conocidas en Costa Rica y documentadas por un testigo citado en el texto. Las especies se presentan en orden alfabético. Para cada especie se incluyen los sinónimos aceptados, los nombres usados en tratamientos anteriores y sus re- ferencias bibliográficas. Para algunos táxones se proporcionan también breves observaciones taxonómicas. La sinopsis incluye 1360 especies en 180 géneros; 287 especies son informes nuevos con respecto a listas ante- riores. Las especies endémicas de Costa Rica representan el 26% del total de las especies comunicadas. Se pro- ponen la nueva combinación Echinella vittata y el nuevo nombre Stelis megachlamys. A c o m p l e t e c o m p i l a t i o n o f a l l c u r r e n t l y r e c o g n i z e d s p e c i e s o f o r c h i d s ( O r c h i d a c e a e ) k n o w n f r o m Costa Rica, and documented by a voucher specimen cited in the text, is presented. Species are listed in alphabeti- cal order. For each especies the accepted synonyms and species names used in older treatments are included, together with bibliographical references. For some of the critical taxa brief taxonomic observations are given. The synopsis includes 1360 species in 180 genera, of which 287 species are recently described or were not reported in earlier studies. The species endemic to Costa Rica represent 26% of the reported species. The new combination Echinella vittata and the new name Stelis megachlamys are proposed.
Sistema general de reclamos: Bridgestone/Firestone de Costa Rica S.A.
No full textAchío Garita, W. & Garita Herrera, R. (2002). Sistema general de reclamos: Bridgestone/Firestone de Costa Rica S.A. [Tesis de Licenciatura]. Universidad Nacional, Costa Rica.Durante el año de 1999 los medios de comunicación colectiva, principalmente escritos, dan a conocer una serie de accidentes automovilísticos con trágicas pérdidas de vidas humanas; donde el factor común involucra a vehículos marca Ford Explorer que utilizaban llantas marca Firestone (Ver Anexos). Todas las observaciones preliminares indican que la causa principal de todos estos fatales accidentes, es el desprendimiento de la banda de rodamiento de una de las llantas traseras del vehículo. Conforme se estudian y analizan los accidentes, principalmente ocurridos en los Estados Unidos y otros países de Latinoamérica, se aprecia que en la mayoría de los caos la llanta que sufre este tipo de problema es la situada al lado izquierdo en la parte trasera del vehículo. Sin embargo, estudios realizados en otros países como Venezuela, determinan que los accidentes han ocurrido también con llantas de otras marcas, dentro de las cuales podemos citar: Good Year, Michellin y General, todas con el mismo vehículo.During 1999, the mass media, mainly written, publicized a series of automobile accidents with tragic loss of human life; where the common factor involves Ford Explorer brand vehicles that used Firestone brand tires (See Annexes). All preliminary observations indicate that the main cause of all these fatal accidents is the detachment of the tread from one of the vehicle's rear tires. As accidents are studied and analyzed, mainly those occurring in the United States and other Latin American countries, it can be seen that in most cases the tire that suffers from this type of problem is the one located on the left side at the rear of the vehicle. However, studies carried out in other countries such as Venezuela, determine that accidents have also occurred with tires from other brands, among which we can cite: Good Year, Michellin and General, all with the same vehicle.Universidad Nacional, Costa RicaEscuela de Informátic
Fundamentos Democráticos del Sistema Político Costarricense
No full textEl presente trabajo, no tiene por finalidad hacer un amilisis exhaustivo de un tema que por si, merece un estudio mucho mas profundo que el que con esta explicacion iniciamos.Sin embargo, hemos querido penetrar un poco en esta problematica por considerarla basica, logicamente, para poder comprender el desarrollo político de Costa Rica, desde el inicio de su vida independlente
Costa Rican gut fungi (Trichomycetes) infecting lotic insect larvae
No full textTrichomycetes infecting freshwater Ephemeroptera and Díptera (Siínuliidae, Chironomidae) in various life zones oC Cósta Rica were studied. Insect populations in 36 streams were sampled, a few repeatedly, at four different . perlods of time over seven years. Eleven new species of Harpellales are reported, plus six species known to occur also in n ontropical parts oí the world. Included are new species of Harpella and Pennella, a new monotypic genus (Graminelloides), and four new species of the previously monotypic genera Spartiella and Genistellospora. Seven new Smittiúm species, including three that are not named at this time, were cultured axenically. A new Amoebidium (Amoebidiales) was found in a stream polluted with organic matter. In the same polluted stream more species of dipteran larvae and a greater number of gut fungi were present than in stretclies of unpolluted water upstream. The overall diversity of Harpellales and their aquatic insect hosts in most Costa Rican streams appeared to be lower than what the author has found in many lotic habitats in more northem and southem regions of the world, and thus this order of fungi may be an exception to the 'latitudinal species diversity gradient' concept as it applies to many other tropical organisms. A key to all 23 Tric homycetes now known to be present in Costa Rica is providedTrichomycetes infecting freshwater Ephemeroptera and Díptera (Siínuliidae, Chironomidae) in various life zones oC Cósta Rica were studied. Insect populations in 36 streams were sampled, a few repeatedly, at four different . perlods of time over seven years. Eleven new species of Harpellales are reported, plus six species known to occur also in n ontropical parts oí the world. Included are new species of Harpella and Pennella, a new monotypic genus (Graminelloides), and four new species of the previously monotypic genera Spartiella and Genistellospora. Seven new Smittiúm species, including three that are not named at this time, were cultured axenically. A new Amoebidium (Amoebidiales) was found in a stream polluted with organic matter. In the same polluted stream more species of dipteran larvae and a greater number of gut fungi were present than in stretclies of unpolluted water upstream. The overall diversity of Harpellales and their aquatic insect hosts in most Costa Rican streams appeared to be lower than what the author has found in many lotic habitats in more northem and southem regions of the world, and thus this order of fungi may be an exception to the 'latitudinal species diversity gradient' concept as it applies to many other tropical organisms. A key to all 23 Tric homycetes now k n o w n to be present in Costa R i c a is provide
Epidendrum tolimense Lindl. (Orchidaceae), una especie sudamericana encontrada en Costa Rica
No full textU n a e s p e c i e p r e v i a m e n t e c o n o c i d a d e s u r A m é r i c a h a s i d o e n c o n t r a d a e n l a C o r d i l l e r a d e Talamanca, Costa Rica. Epidendrum tolimense pertenece al Grupo Elleanthoides y es la primera especie de este grupo que se encuentra fuera de los Andes. A species previously known from South America is found in the Cordillera de Talamanca, Costa Rica. Epidendrum tolimense belongs to the Elleanthoides Group, and is the first species of this group to be found outside the Andes.
Crustal Velocity Anomalies in Costa Rica from Ambient Noise Tomography
No full textWe derive group velocity maps for crustal Rayleigh waves across Costa Rica and corresponding 3-D shear-wave velocity structure from ambient noise cross-correlations between 56 seismic broadband stations. The daily inter-station cross-correlations for the period 2010–2015 of 56 seismic broadband stations are stacked and analysed to warrant a robust extraction of empirical Green’s functions which then are used to measure fundamental mode Rayleigh wave group velocities. Rayleigh wave dispersion curves show consistent patterns within the different geological domains in Costa Rica. Dispersion curves were evaluated in the microseism band from 5- to 17-s period and inverted for group velocity maps using iterative nonlinear travel time tomography. The group velocities at each grid point were inverted for 1-D profiles using a non-linear simulated annealing approach, and transformed into the 3-D velocity structure. The final tomographic model shows clearly the main velocity anomalies associated with tectonic and volcanic activity in Costa Rica. Three localized negative velocity anomalies are seen at all periods (5–17 s) consistent with deep-routed crustal-scale magmatic systems located beneath the Rincón de la Vieja-Miravalles, Arenal-Poás and Turrialba-Irazú volcanic systems, that showed activity over the last 100 years. High velocities can be found beneath the Talamanca arc in southeastern Costa Rica, where active volcanism stopped in the late Miocene. Significant along-strike variations in the morphology of the subducting Cocos plate are imaged consistently by velocity variations in the forearc.We received support from Mineco/Feder Project CGL2015-67130-C2-2-R, Junta de Andalucía research group RNM 104, and CGL2013-48601-C2-1-R (MISTERIOS). This study benefitted greatly from networking within the EU-funded COST action ES1401 TIDES (TIme DEpendent Seismology). In particular E.N. acknowledges to Universidad Nacional de Costa Rica (UNA) for the scholarship to complete her Ph.D. (grant number A-JB-002-2012)
Estudio Preliminar Sobre El Control Químico de Los Gusanos de la Raíz del Maíz Diabrotica SPP. (Chysomelidae Coleptera)
No full textLos conocidos gusanos de la raíz, estados inmaduros de los insectos pertenecientes al género Diabrotic.a, atacan el sistema radical de las plantas de maíz ocasionando su volcamiento. Investigaciones con el propósito de determinar las especies responsables del daño y los insecticidas más efectivos para su control, fueron conducidas en 1959 en la Estación Experimental Agrícola San Fernando de la Facultad de Agronomía de la Universidad de Costa Rica, como parte de un programa cooperativo entre ésta Institución y el Departamento de Agronomía del Ministerio de Agricultura e Industrias
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