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Recent Submissions
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Chia: From Tribute to Super Food
(2017)This chapter uses world-systems analysis to explain how Chia production evolved from constituting a staple food in the Aztec "world empire" to become integrated in the world-economy system. The first section explains its ... -
Proceedings of the NSF/UCR U.S.-Costa Rica Workshop on the Costa Rica earthquakes of 1990-1991 : Effects on soils and structures
(1993-01)On April 22, 1991 a major earthquake (Ms= 7.5) shook the eastern part of Costa Rica and northeastern Panama. The earthquake caused 53 deaths, left 30,000 people homeless, and caused over half a billion dollars in property ... -
Ginsenosides and other Phytochemicals of Panax spp. Properties and uses in the pharmaceutical field
(2021)Introduction: Ginseng has been used since ancient times, for its medicinal properties. This plant comes from the genus Panax, and the most representative species are Panax quinquefolium, Panax ginseng, and Panax ... -
Soil Fungal Community Composition Correlates with Site-Specific Abiotic Factors, Tree Community Structure, and Forest Age in Regenerating Tropical Rainforests
(2021)Successional dynamics of plants and animals during tropical forest regeneration have been thoroughly studied, while fungal compositional dynamics during tropical forest succession remain unknown, despite the crucial roles ... -
Low CyaA expression and anti‐cooperative binding of cAMP to CRP frames the scope of the cognate regulon of Pseudomonas putida
(2021-03)Although the soil bacterium Pseudomonas putida KT2440 bears a bona fide adenylate cyclase gene (cyaA), intracellular concentrations of 30,50-cyclic adenosine monophosphate (cAMP) are barely detectable. By using reporter ... -
Peligros geomorfológicos: inundaciones y procesos de ladera en la cuenca alta del río General, Pérez Zeledón, Costa Rica
(2016-04)La cuenca alta del río General se localiza en el centro-sur de Costa Rica, a 80 km al SE de San José. Esta región está sujeta a una declaratoria oficial por parte de la Comisión Nacional de Prevención de Riesgos y Atención ... -
Condición de uso de la tierra para el período 2003 – 2005 del distrito San Vito, Coto Brus, Puntarenas
(2010)San Vito es el distrito primero del cantón de Coto Brus y en el mismo se presentan los mayores problemas medioambientales como son la presencia de un tajo, varios beneficios de café, el botadero municipal, el hospital y ... -
Condición de uso de la tierra del distrito San Vito, Coto Brus, Puntarenas
(2013)San Vito es el distrito primero del cantón de Coto Brus, provincia de Puntarenas. Según la división político – administrativa de Costa Rica es un distrito; por lo tanto, no se puede desarrollar un plan regulador. Constituye ... -
El impacto socioambiental de la actividad cafetalera en el cantón de Coto Brus, Costa Rica (1940-2015)
(2016)El presente trabajo sintetiza el impacto social y ambiental que trajo consigo la introducción y el desarrollo del café como principal actividad productiva del cantón de Coto Brus entre 1940 y 2015. -
An Experimental Study on Speech Enhancement Based on a Combination of Wavelets and Deep Learning
(2022-06-20)The purpose of speech enhancement is to improve the quality of speech signals degraded by noise, reverberation, or other artifacts that can affect the intelligibility, automatic recognition, or other attributes involved ... -
Identification of Costa Rican speaker’s age group based on acoustic vowel analysis
(2022-04-22)The identification of the speaker’s age is a fundamental task in human-computer interaction. In particular, the recognition of children has drawn attention from the research community due to the vulnerability of se persons ... -
Reconfiguration of metabolic fluxes in Pseudomonas putida as a response to sub-lethal oxidative stress
(2021-01-11)As a frequent inhabitant of sites polluted with toxic chemicals, the soil bacterium and plant-root colonizer Pseudomonas putida can tolerate high levels of endogenous and exogenous oxidative stress. Yet, the ultimate ... -
Felicidade Instrumental em Organizações Cooperativas Costarriquenhas: entre a gestão individualista e o sentido cooperativo
(2021)Esta pesquisa constitui uma crítica à felicidade como compreendida e exercida no âmbito do trabalho. Objetiva-se analisar a lógica da felicidade instrumental em um grupo de organizações cooperativas dedicadas à produção, ... -
Orbitals in general chemistry, Part III: Consequences for Teaching
(2021)In Part III of this series, we undertake a critique of the nature of application of orbitals to describe or to explain the structure and the binding within molecules and materials. Teaching orbitals in introductory chemistry ... -
Orbitals in general chemistry, Part II: Mathematical Realities
(2021)In Part II of a three-part series, we discuss two factors absent from textbooks of general chemistry that are important in a discussion of teaching orbitals. First, atomic orbitals are shown systematically to comprise ... -
Orbitals in general chemistry, Part I: The great debate
(2020-08)In Part I of a three-part series, we present an objective survey of the technical literature discussing the inclusion of orbitals in highschool and post-secondary general chemistry. We start with the definition of orbitals. ... -
Norstictic Acid Is a Selective Allosteric Transcriptional Regulator
(2021-06-17)Inhibitors of transcriptional protein–protein interactions (PPIs) have high value both as tools and for therapeutic applications. The PPI network mediated by the transcriptional coactivator Med25, for example, regulates ... -
Vulnerabilidad sísmica de los puentes de la red vial del Gran Area Metropolitana de San José, Costa Rica
(2006-07-27)La ocurrencia de un evento sísmico de gran intensidad conlleva grandes pérdidas humanas y materiales en una región. Este impacto se podría reducir mediante el reforzamiento de las estructuras más vulnerables a la acción ... -
Stochastic Integration With Respect to Cylindrical Semimartingales
(2021)In this work we introduce a theory of stochastic integration with respect to general cylindrical semimartingales defined on a locally convex space Φ. Our construction of the stochastic integral is based on the theory of ... -
Strengthening one’s socio-cultural skills in a foreign language through video conferencing
(2017)The use of different technological aids in educational settings such as the video conferencing equipment has increased throughout the last years. This article reports the benefits that a group of twenty-four advanced ...
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