Browsing Investigación by Author "Fábrega, José"
Now showing items 1-19 of 19
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Caracterización morfológica y espectral de 6 variedades criollas de arroz (Oryza sativa L.) en Panamá
Jiménez, José Ulises; Quirós-McIntire, Evelyn Itzel; Camargo-García, Víctor; Serrano, Jorge; Sánchez-Galán, Javier; Fábrega, José (2018-07-19)El presente trabajo forma parte del proyecto SENACYT IDDS 15-184 titulado “Diseño de un sistema experto basado en firmas espectrales de coberturas agropecuarias en Panamá”. El sitio de estudio se localiza en el Sub-centro ... -
Clasificacion Supervisada de Firmas Espectrales de ´ Coberturas Agropecuarias en Panama Utilizando el ´ Mapeo del Angulo Espectral
Sanchez-Galan, Javier; Jiménez, José Ulises; Fábrega, José; Serrano, Jorge; Quirós-McIntire, Evelyn Itzel (XLV CONFERENCIA LATINOAMERICANA DE INFORMÁTICAXLV CONFERENCIA LATINOAMERICANA DE INFORMÁTICA, 2019-10-30)En este trabajo se presentan consideraciones el desarrollo de una base de datos de firmas espectrales georreferenciadas de coberturas de cultivos agropecuarios y vegetación baja, conocida como biblioteca de firmas espectrales, ... -
Composition, Diversity, and Tree Structure of a Tropical Moist Forest in Gamboa, Colon, Panama
Jiménez, José Ulises; Fábrega, José; Mora, Dafni; Tejedor, Nathalia; Sánchez, Marilyn (2016-03-22)This study focuses on the floristic diversity of the forest trees found at Cerro Pelado Tropical Hydrology Observatory in Gamboa, Colon, Panama. Field work for the quantitative inventory was carried out in November 2012. ... -
Detección de índice de área foliar por firma espectral de cultivo de arroz (Oryza sativa L.)
Serrano Reyes, Jorge; Fábrega, José; Quirós, Evelyn; Jiménez, José Ulises; SanchezGalan, Javier (2018-07-19)El objetivo del estudio fue determinar las longitudes para la detección espectral del índice de área foliar en cultivo de arroz variedad IDIAP 52-05. Se realizaron mediciones de campo con un espectrorradiómetro y medidas ... -
Estimates of biomass and fixed carbon at a rainforest in Panama
Pinzón, Reinhardt; Fábrega, José; Vega, David; Vallester, Erick; Aizprúa, Rafael; López Serrano, Francisco; Ogden, Fred; Espino, Kleveer (2012-10)This paper presents an estimation of the quantity of carbon fixed in trees in a one hectare (ha) plot at the Cerro Pelado-Gamboa Hydrology Tropical Observatory, which is located in the province of Colon, Panama. The ... -
Estimates of Biomass and Fixed Carbon at a Rainforest in Panama
Pinzón, Reinhardt; Fábrega, José; Vega, David; Vallester, Erick; Aizprúa, Rafael; López-Serrano, Francisco; Ogden, Fred; Espino, Kleveer (2012-10-03)This paper presents an estimation of the quantity of carbon fixed in trees in a one hectare (ha) plot at the Cerro Pelado-Gamboa Hydrology Tropical Observatory, which is located in the province of Colon, Panama. The ... -
Heterogeneous photochemical reactions of decabromodiphenyl ether
Fábrega, José (11/03/2009)Brominated diphenyl ethers area major class of brominated flame retardants, with production of decabromodiphenyl ether (DBDPE) contributing significantly to this total. Although little is known about the mechanisms and ... -
Hydroclimate projections for Panama in the late 21st Century
Fábrega, José; Nakaegawa, Tosiyuki; Pinzón, Reinhardt; Nakayama, Keisuke; Arakawa, Osamu (2013-03-31)This work analyzes hydroclimate projections in Panama toward the end of the 21st century by employing the MRIAGCM3.1 model. Understanding the impact of climate change on water resources is fundamental for a number of economic ... -
Increase In Simple Precipitation Intensity Index In Panama
NAKAYAMA, Keisuke; BEITIA, Carlos; VALLESTER, Erick; PINZON, Reinhardt; Fábrega, José; NAKAEGAWA, Toshiyuki; MARUYA, Yasuyuki; ESPINOSA, Jorge; OLMEDO, Berta; KATO, Junko; KOMAI, Katsuaki (2011-09-30)The paper describes trends in climate change indices in the Republic of Panama by using long-term meteorological data sets from the Panama Canal and MRI-AGCM. Simple precipitation intensity index from eleven climate change ... -
Induced Desorption of DDT, DDD, and DDE from a Contaminated Sediment
Jafvert, Chad; Vogt, Beth; Fábrega, José (1997-03-01)Release profiles of p,p′-DDT, p,p′-DDD, and p,p′-DDE from sediment collected from Indian Creek, Alabama, were measured with a gas purge-induced desorption technique and compared to a model developed in this work. DDT entered ... -
Modeling Abiotic Processes of Aniline in Water-Saturated Soils
Fábrega, José; Jafvert, Chad; Li, Hui; Lee, Linda (03/18/2000)The long-term interactions of aromatic amines with soils are important in defining the fate and transport of these compounds in the environment. Abiotic loss of aniline from the aqueous phase to the soil phase occurs with ... -
Modeling Competitive Cation Exchange of Aromatic Amines in Water-Saturated Soils
Fábrega, José; Jafvert, Chad; Li, Hui; Lee, Linda (06/01/2001)Competitive association to several components of soil through ion exchange processes influences the fate of organic cations in the environment. To examine these processes, the distributions of aniline and 1-aminonaphthalene ... -
Modeling Short-Term Soil−Water Distribution of Aromatic Amines
Fábrega, José; Li, Hui; Jafvert, Chad; Lee, Linda (1998-12-08)The applicability of a distributed parameter model for describing the distribution of aniline and α-naphthylamine between soil and aqueous phases at short contact times was assessed. Mass action equations considered in the ... -
Participación de estudiantes de escuelas primarias en el proceso de muestreo climatológico en la Ciudad de Panamá
Roman, Anelly; Fábrega, José (2011-11)Esta investigación representa el primer paso en el desarrollo de una metodología que permita complementar la información meteorológica recolectada en la Ciudad de Panamá, con el aporte de centros educativos. Este trabajo ... -
Remote sensing of temperature changes in Panama canal watershed from landsat
Ureña, Grimaldo; Fábrega, José (2010-09)La temperatura de superficie es un factor central, como variable de control en los estudios de cambio climático, balance de calor y modelos climáticos. El conocimiento de la temperatura de superficie es importante para ... -
Role of pH in partitioning and cation exchange of aromatic amines on water-saturated soils
Li, Hui; Lee, Linda; Fábrega, José; Jafvert, Chad (08/04/2001)Predicting the reversible interactions between aromatic amines and soil is essential for assessing the mobility, bioavailability and exposure from contaminated sites. Reversible sorption mechanisms of aniline and α-naphthylamine ... -
Scintillometer networks for calibration and validation of energy balance and soil moisture remote sensing algorithms
Hendrickx, Jan; Kleissl, Jan; Gómez Vélez, Jesús; Hong, Sung-ho; Fábrega, José; Vega, David; Moreno Ramírez, Hernán; Ogden, Fred (05/07/2007)Accurate estimation of sensible and latent heat fluxes as well as soil moisture from remotely sensed satellite images poses a great challenge. Yet, it is critical to face this challenge since the estimation of spatial and ... -
Study of Seasonal Rainfall Infiltration Via Time-Lapse Surface Electrical Resistivity Tomography: Case Study of Gamboa Area, Panama Canal Watershed
Mojica, Alexis; Díaz, Irving; Ho, Carlos A.; Ogden, Fred; Pinzón, Reinhardt; Fábrega, José; Vega, David; Hendrickx, Jan (2013-12-18)The present investigation was focused on the variations in rainwater infiltration experienced by soils of Gamboa zone (Panama Canal Watershed) during various seasons of the year, employing a time-lapse analysis of electrical ... -
Study of Seasonal Rainfall Infiltration Via Time-Lapse Surface Electrical Resistivity Tomography: Case Study of Gamboa Area, Panama Canal Watershed
Mojica, Alexis; Díaz, Irving; Ho, Carlos; Ogden, Fred; Pinzón, Reinhardt; Fábrega, José; Vega, David; Hendrickx, Jan (2013-12-18)The present investigation was focused on the variations in rainwater infiltration experienced by soils of Gamboa zone (Panama Canal Watershed) during various seasons of the year, employing a time-lapse analysis of electrical ...