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Search Results: 1 - 10 of 45140 matches for " René Bernardo Elías Cabrera-Cruz "
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Comparative Analysis of Carbon Monoxide Modeling from Vehicular Sources in Puebla City, México  [PDF]
Sthephany Sede?o-Cisneros, María Auxilio Osorio-Lama, Miguel ángel Valera-Pérez, René Bernardo Elías Cabrera-Cruz
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.61009
Abstract: The results of dispersion modeling of carbon monoxide are reported in this paper. The results of applying the technique of Rapid Assessment of Sources of Environmental Pollution (RASEP) database and the Air Monitoring State System in the City of Puebla, México, were employed. Concentrations of carbon monoxide emitted by cars inferred by RASAP technique with those reported by the environmental monitoring station “Nymphs”, were compared. The date of 21 June 2005-2010 was selected during the peak hour traffic flow. The dispersion of carbon monoxide was modeled by software DISPER and SCRI software, in order to infer the exposure levels of carbon monoxide in the study area. The estimated and monitored concentrations were evaluated with the Mexican regulations for population’s health protection. Regarding the dispersion model, SCRI was discarded for the target validation because it only allows modeling on specific areas. Moreover, the modeling software allowed DISPER simulations with linear sources of car exhaust, so this advantage is considered appropriate to continue using this program. Both estimates obtained by RASEP, as modeled by DISPER and recorded by the monitoring system exceed the maximum permissible limits of NOM-021-SSA1-1993 getting an impermissible for the area of influence of the assessment monitoring station. The DISPER software has potential use for such evaluations, but more work is required on the system for their inferences can be validated by reproducible physical and chemical measurements.
Comparative Analysis of Carbon Monoxide Modeling from Vehicular Sources in Puebla City, México  [PDF]
Sthephany Sede?o-Cisneros, María Auxilio Osorio-Lama, Miguel ángel Valera-Pérez, René Bernardo Elías Cabrera-Cruz
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.61009
Abstract: The results of dispersion modeling of carbon monoxide are reported in this paper. The results of applying the technique of Rapid Assessment of Sources of Environmental Pollution (RASEP) database and the Air Monitoring State System in the City of Puebla, México, were employed. Concentrations of carbon monoxide emitted by cars inferred by RASAP technique with those reported by the environmental monitoring station “Nymphs”, were compared. The date of 21 June 2005-2010 was selected during the peak hour traffic flow. The dispersion of carbon monoxide was modeled by software DISPER and SCRI software, in order to infer the exposure levels of carbon monoxide in the study area. The estimated and monitored concentrations were evaluated with the Mexican regulations for population’s health protection. Regarding the dispersion model, SCRI was discarded for the target validation because it only allows modeling on specific areas. Moreover, the modeling software allowed DISPER simulations with linear sources of car exhaust, so this advantage is considered appropriate to continue using this program. Both estimates obtained by RASEP, as modeled by DISPER and recorded by the monitoring system exceed the maximum permissible limits of NOM-021-SSA1-1993 getting an impermissible for the area of influence of the assessment monitoring station. The DISPER software has potential use for such evaluations, but more work is required on the system for their inferences can be validated by reproducible physical and chemical measurements.
Perspectives of Waste Electrical and Electronic Equipment in Tampico, Mexico  [PDF]
René Bernardo Elías Cabrera-Cruz, María Esther Bautista-Vargas, Julio César Rolón-Aguilar, Ricardo Tobías-Jaramillo, Alberto José Gordillo-Martínez
Journal of Environmental Protection (JEP) , 2014, DOI: 10.4236/jep.2014.512120
Abstract: Waste electrical and electronic equipment (WEEE) has brought negative effects to the environment produced by the materials that compose them. The proper implementation of management plans of WEEE should integrate measures to prevent, mitigate and correct these affectations. As an initial step, it is necessary to make a diagnosis of the current situation of WEEE management which is the objective of this work. The studied zone was composed by the municipalities of Tampico, Ciudad Madero and Altamira located in southeast Tamaulipas, Mexico. The descriptive analysis of technical and regulatory aspects of the current management system in the study area was developed, including generation rates and analysis of waste streams. Among the main results, the generation of WEEE was estimated in 2040.38 tons/year for 2013, distributed in the municipalities of Tampico with 830.93 tons/year, Altamira with 650.18 tons/year, and Ciudad Madero with 559.27 tons/year. This calculation was estimated using Mexico’s WEEE generation indicators. The analysis of waste streams includes five categories of WEEE, Televisions with 61% of the total generation, followed by sound devices with 18%, personal computers with 17%; mobile phones with 2% as well as fixed phones with 1%. In the study area, reports of Tampico’s municipality indicated that 96 tons of WEEE was collected in the city of Tampico in 2013. In México, the national legislation considers WEEE in the category of waste requiring special handling (WRSH), however, it exists an inadequacy in the environmental laws about the specific classification of this kind of debris that makes their effective management more difficult. No companies who provide a management or treatment operations for WEEE are reported in Tampico, or in the near region. In addition, despite an initial interest for the municipality to attend the WEEE problematic, it exists a lack of sensibility of the population in the absence of environmental education programs.
Developing Ontology Systems as a Base of an Environmental Quality Management Model in México  [PDF]
René Bernardo Elías Cabrera-Cruz, Erika Alarcón-Ruiz, Julio César Rolón-Aguilar, Salvador W. Nava-Díaz, Elena María Otazo-Sánchez, Ricardo Pérez Aviléz
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.69095
Abstract: The process of identifying the attributes and relationships considered in an ontology is a complex task because there are many factors involved in the deterioration of environmental quality, the diversity of sources and data dispersion. This work presents an ontology that integrates the data required by an Environmental Quality Synoptic System (EQSS), which to date scatters in different Internet sites and concentrates by different agencies for example INEGI, CONABIO, SEMARNAT, CNA, among others. The methodology process consists of the collection of environmental information in Mexico through the application of computational techniques resulting ontology with environmental knowledge that will be processed by the system EQSS. Among the main advantages is than the selection and structure of information allow the automated generation of results in an environmental statement. The ontology proposal is based on knowledge of EQSS system that is based on the architecture of expert systems and through this important information for decision-making in regard to environmental quality and interaction with Geographic Information System (GIS) is obtained.
Inventario de contaminación emitida a suelo, agua y aire en 14 municipios del estado de Hidalgo, México
René Bernardo Elías Cabrera Cruz,Alberto José Gordillo Martínez,álvaro Cerón Beltrán
Revista internacional de contaminación ambiental , 2003,
Abstract: En el presente trabajo se realizó el inventario de las fuentes de contaminación en 14 municipios del estado de Hidalgo, México. Es importante determinar cualitativa y cuantitativamente las emisiones contaminantes en esta parte del estado que concentra alrededor de 40 % de la población, las principales vías de comunicación, los servicios y parques industriales. La metodología empleada está basada en la técnica de evaluación rápida de fuentes de contaminación ambiental. Esta técnica permite evaluar de manera rápida y económica las principales fuentes y zonas de contaminación; se utilizaron coeficientes y cálculos de aportes contaminantes basados en datos de producción industrial e información estadística. Se determinó el número de fuentes contaminadoras, su naturaleza y la cantidad de las emisiones a suelo, agua y aire en el área de estudio. Los resultados se agrupan de acuerdo con la clase de fuentes de contaminación por municipio, sector generador y tipo de contaminantes, esto permite la jerarquización de la problemática ambiental de Hidalgo y proporciona elementos para formular políticas de combate y prevención de la contaminación al ambiente en esta entidad.
EVALUACIóN REGIONAL DEL IMPACTO ANTROPOGéNICO SOBRE AIRE, AGUA Y SUELO. CASO: HUASTECA HIDALGUENSE, MéXICO
Alberto José GORDILLO MARTíNEZ,René Bernardo Elías CABRERA CRUZ,Marisol HERNáNDEZ MARIANO,Erick GALINDO
Revista internacional de contaminación ambiental , 2010,
Abstract: El estado de Hidalgo, México presenta una importante problemática ambiental que se manifiesta de manera heterogénea a lo largo de su territorio. Existe la necesidad de conocer las fuentes, tipos de agentes contaminantes y su magnitud. En este trabajo se realizó un inventario de la contaminación emitida por fuentes de origen industrial y doméstico en aire, agua y suelo en diez municipios de la región de la Huasteca por medio de la técnica de Evaluación Rápida de Fuentes de Contaminación Ambiental (ERFCA). El total de la contaminación emitida fue de 116 978.95 ton/a o. Las emisiones al aire por vehículos a gasolina fueron un total de 11 039 ton/a o, los vehículos a diesel emitieron 1521 ton/a o. Para agua, las fuentes industriales aportaron 22 496 ton/a o, las domésticas 15 776 ton/a o. La contaminación emitida al suelo por residuos sólidos industriales fue de 4025 ton/a o, los residuos sólidos urbanos emitieron 62 121 ton/a o. Por municipio, Huejutla de Reyes fue el más contaminado en aire, agua y suelo con 53 % del total. A partir de estos resultados fue evaluada la calidad ambiental de cada medio, que con base en la normatividad mexicana, no es admisible para agua y suelo. Se construyó una base de datos con información relevante que apoyará el manejo eficiente de las emisiones contaminantes, la realización de estudios complementarios y promoverá la futura conservación de la calidad ambiental y la riqueza biológica de la zona.
Inventario de residuos peligrosos industriales en 17 municipios del Estado de Hidalgo, México
René Bernardo Elías Cabrera Cruz,Alberto José Gordillo Martínez,álvaro Cerón Beltrán
Revista internacional de contaminación ambiental , 2004,
Abstract: El objetivo del presente trabajo consistió en la realización de un inventario de residuos peligrosos en 17 municipios del estado de Hidalgo, México. Los resultados obtenidos son los primeros en su tipo y cumplen con el propósito fundamental de complementar y precisar la información sobre este tema; además, permitirán la formulación de acciones tales como programas de control y monitoreo de emisiones de residuos peligrosos, transporte adecuado, tratamiento y disposición final, tendientes a la mejora de la situación del ambiente en Hidalgo. La zona de estudio corresponde al 12.5% de la superficie total del estado y al 40.5% de su población; además concentra a todos los parques industriales y a las industrias más representativas de esta entidad. La metodología utilizada fue la Evaluación Rápida de Fuentes de Contaminación Ambiental. El estudio permitió identificar a las fuentes emisoras de residuos peligrosos y determinar sus clases, tipos y cantidades.
Soaring Migratory Birds Avoid Wind Farm in the Isthmus of Tehuantepec, Southern Mexico
Rafael Villegas-Patraca, Sergio A. Cabrera-Cruz, Leonel Herrera-Alsina
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0092462
Abstract: The number of wind farms operating in the Isthmus of Tehuantepec, southern Mexico, has rapidly increased in recent years; yet, this region serves as a major migration route for various soaring birds, including Turkey Vultures (Cathartes aura) and Swainson's Hawks (Buteo swainsoni). We analyzed the flight trajectories of soaring migrant birds passing the La Venta II wind farm during the two migratory seasons of 2011, to determine whether an avoidance pattern existed or not. We recorded three polar coordinates for the flight path of migrating soaring birds that were detected using marine radar, plotted the flight trajectories and estimated the number of trajectories that intersected the polygon defined by the wind turbines of La Venta II. Finally, we estimated the actual number of intersections per kilometer and compared this value with the null distributions obtained by running 10,000 simulations of our datasets. The observed number of intersections per kilometer fell within or beyond the lower end of the null distributions in the five models proposed for the fall season and in three of the four models proposed for the spring season. Flight trajectories had a non-random distribution around La Venta II, suggesting a strong avoidance pattern during fall and a possible avoidance pattern during spring. We suggest that a nearby ridgeline plays an important role in this pattern, an issue that may be incorporated into strategies to minimize the potential negative impacts of future wind farms on soaring birds. Studies evaluating these issues in the Isthmus of Tehuantepec have not been previously published; hence this work contributes important baseline information about the movement patterns of soaring birds and its relationship to wind farms in the region.
Evaluación regional del impacto antrópico sobre aire, agua y suelo. Caso: huasteca hidalguense, México
GORDILLO MARTíNEZ, Alberto José;CABRERA CRUZ, René Bernardo Elías;HERNáNDEZ MARIANO, Marisol;GALINDO, Erick;OTAZO, Elena;PRIETO, Francisco;
Revista internacional de contaminación ambiental , 2010,
Abstract: the state of hidalgo, mexico presents an important environmental problem that manifests itself in different ways. to identify the sources, types and the magnitude of pollutants, an inventory of sources of industrial and domestic pollution for air, water and soil in ten municipalities of the huasteca region of the state was carried out using the technique of rapid assessment of sources of environmental pollution and the results are reported in this paper. a total of combined pollutants emitted was 116 978.95 tons/year. gasoline vehicles contributed 11 039 tons/year of air pollutants and diesel vehicles 1521 tons/year. for water, industrial sources contributed 22 496 tons/year and domestic effluents 15 776 tons/year. soil pollution was a result of industrial solid waste, 4025 tons/year, and municipal solid waste, 62 121 tons/year. by municipality, huejutla de reyes is the most polluted in air, water and soil, with 53 % of the regional total. these results were evaluated in relation to environmental quality of each medium based on the mexican regulations; these levels are above permissible limits for water and soil. a database with relevant information was prepared as a support for efficient management of pollutant emissions, provide base mark data for complementary studies, and to promote the future conservation of environmental quality and the biological richness of the area.
Resultados de la Convocatoria 2007 para investigaciones en el sector de la salud
Cabrera Cruz,Niviola; álvarez Blanco,Adolfo; González Elías,Amador García;
Revista Cubana de Salud Pública , 2008, DOI: 10.1590/S0864-34662008000300017
Abstract: the present article showed the organizational characteristics of the evaluation process of the research and innovation projects submitted to the 2007 announcement of the scientific and technical branch programs of the ministry of public health led by the science and technology division. the phases that make up the structure of such process as well as the importance of assuring that every project be subjected to a strict evaluation process were described. the above-mentioned process takes into account the project priorities, the protection of results, anticipated scientific production, relevance of the proposal, project manager's experience, project excellence, capacities to be developed, coherence, quality, impact and sustainability of the project proposal. the evaluation as such includes two aspects, that is, a qualitative evaluation and a quantitative evaluation. in this 2007 announcement, a project was considered as approved when its success index was over 70 points. three hundred and seventy six out of the 565 projects that were submitted managed to reach this score. this result demonstrated that 66.5 % of projects had the required quality to be implemented. it was demonstrated that the management and evaluation process of projects is susceptible of improvement in the future.
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