Escuelas y Departamentos: Envíos recientes
Mostrando ítems 201-220 de 565
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IBA efficiency on mini-cutting rooting from teak (Tectona grandis Linn F.) clones
(Revista Arvore, 2016)This study aimed to evaluate IBA efficiency in mini-cuttings rooting based on four Tectona grandis clones. Vegetative samples were collected in a hydroponic mini-clonal hedge in Verde Novo reforestation company at Colider, ... -
Generalized brillinger-like transforms
(IEEE Signal Processing Letters, 2016)We propose novel transforms of stochastic vectors, called the generalized Brillinger transforms (GBT1 and GBT2), which are generalizations of the Brillinger transform (BT). The GBT1 extends the BT to the cases when the ... -
Optical performance of finished and unfinished tropical timbers exposed to ultraviolet light in the field in Costa Rica
(Wood Material Science & Engineering, 2016)This study evaluated wood color change (ΔE*) and the surface quality in 10 tropical wood species painted with three finishes (composed of wax and polyurethane). Two weathering conditions were tested: natural weathering ... -
Implementation of stellarator of Costa Rica 1 SCR-1
(26th IEEE Symposium on Fusion Engineering, SOFE 2015, 2015)The SCR-1 is a small modular stellarator designed, constructed and is being implemented at Instituto Tecnológico de Costa Rica. The project is its final phase of commissioning and it is expected to be operational in June ... -
Molecular identification of Trichoderma spp. in garlic and onion fields and In Vitro antagonism trials on Sclerotium cepivorum
(Revista Brasileira de Ciencia do Solo, 2016)Trichoderma species are non-pathogenic microorganisms that protect against fungal diseases and contribute to increased crop yields. However, not all Trichoderma species have the same effects on crop or a pathogen, whereby ... -
Model reduction of a flexible-joint robot: a port-Hamiltonian approach
(IFAC-PapersOnLine, 2016)In this paper we explore the methodology of model order reduction based on singular perturbations for a flexible-joint robot within the port-Hamiltonian framework. We show that a flexible-joint robot has a port-Hamiltonian ... -
Kiln drying behavior utilizing drying rate of lumber from six fast-growth plantation species in Costa Rica
(Drying Technology, 2016)The objective was to study the effect of the drying time and moisture content variations on the drying rate during kiln drying. The moisture content is a good predictor of the variation in drying rate; to determine the ... -
Ganho genético esperado para melina (Gmelina arborea roxb.) em cordoba (Colômbia)
(Revista Arvore, 2016)El Departamento de Córdoba (Colombia) planea plantar 200000 ha para el 2025 y Gmelina arborea es una de las opciones dada su alta producción de biomasa en turnos cortos. El objetivo del estudio fue estimar el potencial ... -
Experiences of educational use of technologies a case of facebook, google plus and the use of blogs
(Proceedings - 2016 11th Latin American Conference on Learning Objects and Technology, LACLO, 2016)This workshop considers to share some experiences of educational practice of technologies used in English courses at the Technological Institute of Costa Rica, known in Spanish by its abbreviation (ITCR) throughout three ... -
ESACEM: estudio de la autoconfianza matemática en estudiantes de educación media
(Instituto Tecnológico de Costa Rica. Escuela de Matemática, 2016)El proyecto de investigación plantea el estudio de la “autoconfianza matemática” de los/as estudiantes de la educación media costarricense. La “autoconfianza matemática” es una creencia sobre la propia competencia ... -
Evaluation of wood properties from six native species of forest plantations in Costa Rica
(Bosque, 2016)This study details information about physical, chemical and mechanical properties, drying, preservation and workability of wood from Cordia alliodora, Dipteryx panamensis, Enterolobium cyclocarpum, Hieronyma alchorneoides, ... -
Effects on density, shrinking, color changing and chemical surface analysis through FTIR of Tectona grandis thermo-treated: Density, shrinking, color changing and chemical analysis by FTIR of the thermally-treated teak wood
(Forest Sciences, 2016)Thermal-treatment wood is used as an option to improve durability of wood in recent years. This study evaluated the effect of temperature in thermally treated Tectona grandis wood in density, shrinking, color changing ... -
Effect of pretreatment temperature on the surface modification of diatomite with trimethylchlorosilane
(Journal of Porous Materials, 2016)Diatomite samples from Costa Rica were purified using acidic treatments with hydrochloric acid, thermally treated (400–1000 C) and then silylated with trimethylchlorosilane in toluene under inert atmosphere. The ... -
Effect of an energy supplementation, weaning and oestrous synchronisation on ovarian activity and ovulation in early postpartum primiparous Bos indicus cows raised in the tropics of Costa Rica
(Animal Production Science, 2016)To evaluate the effect of an energy supplementation, 26 postpartum Bos indicus cows were assigned either to receive an energy diet supplementation (n = 11, SSD) or no supplementation (n = 15, NSSD). Cows in the SSD ... -
Polyphenolic composition and antioxidant activity of aqueous and ethanolic extracts from Uncaria tomentosa bark and leaves
(Instituto Tecnológico de Costa Rica, 2018)Uncaria tomentosa constitutes an important source of secondary metabolites with diverse biological activities mainly attributed until recently to alkaloids and triterpenes. We have previously reported for the first-time ... -
E-bridge 3.0: A strategic approach to structural health monitoring of bridges in Costa Rica
(IFIP Advances in Information and Communication Technology, 2016)The general condition of road infrastructure is a major weakness of the Costa Rican economy. In particular, a significant percentage of national bridges show an average or critical condition regarding parts of their ... -
Development of the HBV-TEC hydrological model
(Elsevier, 2016)In this paper, the HBV-TEC hydrological model is presented. The development of this model version, aims to provide researchers and scholars with a stable and robust implementation of the HBV hydrological model based on the ... -
Comparative study of the optical behavior of a porphyrin encapsulated in sol-gel silica coatings and in solution as a function of pH
(Elsevier, 2016)We report a comparative optical spectral study as a function of pH on a porphyrin encapsulated in a solgel matrix and in methanol solution. Its response has been discussed in terms of pH-sensitivity as a function of the ... -
Characteristics and properties of torrefied biomass pellets from Gmelina arborea and Dipterix panamensis at different times
(Revista Chapingo, Serie Ciencias Forestales y del Ambiente, 2016)Torrefaction and pelletizing were studied in the generation of energy from lignocellulosic residues to increase the energy properties of the biomass. The aim of this study was torrefied sawdust from Gmelina arborea and ... -
Automated plant species identification: Challenges and Opportunities
(IFIP Advances in Information and Communication Technology, 2016)The number of species of macro organisms on the planet is estimated at about 10 million. This staggering diversity and the need to better understand it led inevitably to the development of classification schemes called ...