Escuelas y Departamentos: Envíos recientes
Mostrando ítems 341-360 de 565
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Evaluación de la gestión de la ASADA de Santiago, Santiago, Paraíso, desde una perspectiva del uso sostenible del recurso hídrico
(Instituto Tecnológico de Costa Rica. Vicerrectoría de Investigación y Extensión (VIE). Escuela de Química. Centro de Investigación en Protección Ambiental (CIPA), 2016)La sostenibilidad de la distribución del agua potable en las diferentes ASADAs del país es un tema complejo, multifactorial y dependiente de muchos actores y condiciones ambientales. A la fecha los principales esfuerzos ... -
Evaluación de la gestión de la ASADA de Santa Cristina, La Suiza, Turrialba, desde una perspectiva del uso sostenible del recurso hídrico
(Instituto Tecnológico de Costa Rica. Vicerrectoría de Investigación y Extensión (VIE). Escuela de Química. Centro de Investigación en Protección Ambiental (CIPA), 2016)La sostenibilidad de la distribución del agua potable en las diferentes ASADAs del país es un tema complejo, multifactorial y dependiente de muchos actores y condiciones ambientales. A la fecha los principales esfuerzos ... -
Micropropagación y organogénesis in vitro de Gloxinia sp
(2002)Se estableció un protocolo para la micropropagación de gloxinia y se evaluó en cinco fenotipos. Se realizó un estudio histológico al microscopio electrónico de barrido para determinar el origen de los brotes producidos, ... -
Micropropagación de chayote (Sechium edule) a partir de brotes vegetativos
(2002)El chayote (Sechium edule) es una importante fuente de divisas para los países exportadores, entre los que Costa Rica mantiene el liderazgo mundial. Entre los factores más limitantes para su producción se encuentra el ... -
Cryopreservation of chayote (Sechium edule JACQ.SW.) zygotic embryos and shoot-tips from in vitroplantlets
(2002)This paper presents the development of cryopreservation protocols for zygotic embryos and apices of chayote (Sechium edule Jacq. Sw.), a tropical plant species with recalcitrant seeds. Zygotic embryos of two cultivars, ... -
El consorcio cooperativo de comercialización R.L. Costa Rica: Frijol
(1999)El ingreso de Costa Rica a la Organización Mundial del Comercio, la firma del Tratado Bilateral de Libre Comercio con México y acuerdos multilaterales a nivel Centroamericano generaron cambios importantes en los sistemas ... -
Crioconservación de plantas, estado actual de la investigación en Costa Rica
(1999)En Costa Rica, la investigación en crioconservación es reciente. Inició en 1990 con un proyecto en bananos y plátanos desarrollado en el Centro Agronómico Tropical de Investigación y Enseñanza (CATIE), seguido por proyectos ... -
LaGeR workbench: A language and framework for the representation and implementation of device-agnostic gestural interactions in 2D and 3D
(Springer Verlag, 2015)The recent rise of virtual and augmented reality applications, ambient intelligence, as well as video games have encouraged the proliferation of gestural input devices such as the Razer Hydra, Leap Motion Controller, and ... -
Mineral content in relation to radial position, altitude, chemical properties and density of persian ironwood
(Universidade Federal de Sao Carlos, 2015)Persian ironwood (Parrotia persica) is native species from Iran and covers 10,54% of the commercial volume. Its wood structure and its chemical composition are affected by growth conditions. The aim of the study was to ... -
Performance of Two Hydrological Models in Predicting Daily Flow under a Climate Change Scenario for Mountainous Catchments in Northwestern Costa Rica
(International Mountain Society, 2015)(Figure Presented) Tropical mountain regions contain the main headwaters of important rivers in Central America. We selected 2 contrasting catchments located in a mountainous region to evaluate the precision of daily flow ... -
Physical properties and fiber dimension in Stem, Branch and root of Alder Wood
(Parlar Scientific Publications, 2015-01)The aim of this study was to determine physical properties and fiber dimensions in stem, branch and root wood for alder (Alnus glutinosa L) species. For this purpose, three normal alder trees were selected from Khanican ... -
Analysis of source separation algorithms in industrial acoustic environments
(Institute of Electrical and Electronics Engineers Inc., 2015)This paper shows the results from the computation cost evaluation of three blind source separation algorithms. The algorithms tested were: FastICA, Adaptive Algorithm Based on Natural Gradient, and Adaptive EASI Based on ... -
A WDM-Compatible 4 × 32-Gb/s CMOS-driven electro-absorption modulator array
(OSA - The Optical Society, 2015)A four-channel electro-absorption-modulator array, driven by 32-nm CMOS drivers providing 2-V peak-to-peak output swing, operates with BER < 10-12 at a data rate of 4 × 32 Gb/s and dissipates 170 mW of power. -
A WDM 4x28Gbps integrated silicon photonic transmitter driven by 32nm CMOS driver ICs
(OSA - The Optical Society, 2015)A four-channel WDM silicon photonic transmitter with integrated lasers and modulators driven by low-power 32nm CMOS drivers, is demonstrated to operate at a data rate of 4×28Gb/s with BER<10-12 and power consumption of 10.0pJ/bit. -
Quality of pellets made from agricultural and forestry crops in costa rican tropical climates
(North Carolina State University, 2015)Pellets may be produced with different types of agriculture or forestry crops in Costa Rica. This work evaluated the energy, physical, and mechanical properties of pellets fabricated from 12 types of agricultural and ... -
Not-from-concentrate pilot plant ‘Wonderful’ cultivar pomegranate juice changes: Volatiles
(Elsevier, 2017)Pilot plant ultrafiltration was used to mimic the dominant U.S. commercial pomegranate juice extraction method (hydraulic pressing whole fruit), to deliver a not-from-concentrate (NFC) juice that was high-temperature ... -
Reducing warp and checking in 4 by 4 beams from small-diameter tropical species (tectona grandis, gmelina arborea, and cordia alliodora) obtained by turning the pith inside out.
(Forest Products Society, 2015)Small-diameter logs from plantation trees are prone to warp and to produce checks due to the presence of juvenile wood, growth stresses, and asymmetric shrinkage during the drying process. In the present study, we analyzed ... -
Sensibility analysis of the Trace Transform on land coverage images
(Institute of Electrical and Electronics Engineers Inc., 2015)Aerial or satellital images may be used to produce terrain coverage maps, which in time are a very useful and important tool for decision-making in several fields including biodiversity, telecommunications and natural ... -
The dilemma of combining positive and negative items in scales
(Colegio Oficial de Psicologos Asturias, 2015)Background: This study analyzed the advantages and disadvantages of combining negative and positive items in scales in a Spanish-speaking context. Method: Three telephone surveys of 233 people each were carried out. In ... -
Tree species composition, breeding systems, and pollination and dispersal syndromes in three forest successional stages in a tropical dry forest in Mesoamerica
(Mongaby.com e-journal, 2015)Tropical dry forests (TDF) in Mesoamerica are highly endangered by the expansion of human activities (e.g., agriculture and cattle ranching). In contrast, TDF in Costa Rica have experienced outstanding restoration due to ...