Browsing Facultad de Ciencias Exactas y Naturales by Title
Now showing items 160-179 of 331
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Identificación taxonómica y distribución espacial de quistes de resistencia de dinoflagelados nocivos, en el Golfo de Nicoya, Puntarenas, Costa Rica
(Universidad Nacional, Costa Rica, 2020)El Golfo de Nicoya es uno de los estuarios más productivos del mundo, se le considera un sitio de alto valor biológico, económico y turístico. No obstante, en los últimos años el incremento en los eventos de floraciones ... -
Implant recognition and gender expression following ampoule-androgenic gland implantation in Litopenaeus vannamei females (Penaeidae)
(Aquaculture Vol.468 Part 1. 471-480, 2017-02-01)Indirect evidence indicates that penaeids may have a W/Z sex heritability mechanism with the androgenic gland (AG) mediating masculine differentiation. The present study evaluated the immune response against grafts and the ... -
Implementación de la metodología Six Sigma SDLC para la mejora de la calidad del proceso de desarrollo web.
(2015-06-05)En Accenture Costa Rica, el desarrollo de software web es uno de las líneas de trabajo con mayor auge en la industria de producción digital, en la cual las cargas de trabajo exigen lo mejor de cada uno de los recursos en ... -
Implementación de un proceso innovador para el sistema de localización y verificación de fincas del estado
(2015-11-13)Como parte de su propio accionar, el Estado adquiere, en el marco de la propiedad privada, inmuebles de distintas maneras (compras, expropiaciones, donaciones, entre otras). Por este motivo la situación jurídica de estas ... -
Importancia de la batimetría de las planicies abisales en la propagación de tsunamis transoceánicos
(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 ... -
In vitro digestibility and proteases inhibitory effect of several feedstuffs for Parachromis dovii juveniles and P. dovii hybrid larvae
(Fish Physiology and Biochemistry Vol.42 No.6 1767-1776, 2016)Parachromis dovii, a native cichlid from Costa Rica, is highly appreciated for its size and flesh quality. Further, P. dovii easily accept inert feed from the beginning of exogenous feeding; however, its growth is low ... -
Indicadores ambientales de áreas verdes urbanas para la gestión en dos ciudades de Costa Rica
(2018-08)Abstract: Environmental indicators of urban green areas for management in two cities of Costa Rica. Environmental quality contributes to the physical and mental well-being of the population. In this way, the green areas ... -
Induction of sperm activation in open and closed thelycum penaeoid shrimps
(Aquaculture vol.216 no.1-4 371-381 2003, 2003)A modified egg water (EW) technique for in vitro induction of sperm activation was applied to Trachypenaeus byrdi, Xiphopenaeus riveti (closed thelycum shrimps), and Litopenaeus occidentalis (open thelycum) from a tropical ... -
Information systems management issues in Central America: A multinational and comparative study
(Journal of Strategic Information Systems, 1997-12-03)As businesses move to increased levels of globalization, information systems (IS) management issues in the global economy become increasingly significant. This study identified and evaluated the key IS management issues ... -
Information systems management issues in Central America: A multinational and comparative study
(Journal of Strategic Information Systems, 1997-12-03)As businesses move to increased levels of globalization, information systems (IS) management issues in the global economy become increasingly significant. This study identified and evaluated the key IS management issues ... -
Information technology and sustained competitive advantage: A resource-based analysis
(MIS Quarterly: Management Information Systems, 1995-12)The concept of IT as a powerful competitive weapon has been strongly emphasized in the literature, yet the sustainability of the competitive advantage provided by IT applications is not well-explained. This work discusses ... -
Information technology and sustained competitive advantage: A resource-based analysis
(MIS Quarterly: Management Information Systems, 1995-12)The concept of IT as a powerful competitive weapon has been strongly emphasized in the literature, yet the sustainability of the competitive advantage provided by IT applications is not well-explained. This work discusses ... -
Innovación en la Gestión del Sistema de Planificación de la Universidad Nacional
(2015-06-22)En la Universidad Nacional existe un Sistema de Planificación formalmente constituido y normado desde el Estatuto Universitario. Al igual, existe otra normativa interna y externa que da sustento a su existencia. Sin ... -
Innovación en las empresas de desarrollo de software costarricense: Aplicabilidad del modelo de roles A-F
(Universidad Nacional, 2019)En este artículo se analiza la innovación en empresas de desarrollo de software costarricense y se indaga sobre la aplicabilidad del modelo de roles A-F en dichas empresas. Con base en la información obtenida a través ... -
Innovation management in software: Case studies from the Costa Rican software development industry
(Proceedings of the 2013 39th Latin American Computing Conference, 2013-10-07)We study in this work innovation in several Costa Rican software development companies, in order to associate to each of them a model of innovation management, according to the literature. This is done with the purpose of ... -
Integrated curriculum based on projects: Opportunities and constraints a case study in systems engineering
(39th Latin American Computing Conference, CLEI 2013, 2013)The Universidad Nacional is making significant efforts to improve the professional performance of graduates according to the needs of the society and the industry. In particular, the School of Informatics has been exploring ... -
Isolation and partial purification of a hemolytic sphingomyelin-inhibitable fraction from the sea anemone Anthopleura nigrescens
(2014-03)Actinoporins are highly hemolytic pore-forming proteins with a molecular mass of around 20 kDa and high affinity for sphingomyelin-containing membranes. On the crude extract of the sea anemone Anthopleura nigrescens, the ... -
Isolation of ammonium- and nitrite-oxidizing bacterial strains from soil, and their potential use in the reduction of nitrogen in household waste water
(Universidad de Costa Rica, 2017-12-01)Currently, nitrogen has become the main element of water pollution, causing riverine, lacustrine and coastal eutrophication. The continuous contamination of aquifers and the absence of planned water resource utilization, ...
