Datación de sedimentos recientes utilizando isótopos radioactivos en el río Verde, en el estado de Oaxaca, México

Dating of recent sediments using radioactive isotopes in the Rio Verde, Oaxaca state, Mexico

José Alfredo González Verdugo EDITH ROSALBA SALCEDO SANCHEZ MARIA JOSELINA CLEMENCIA ESPINOZA AYALA MANUEL MARTINEZ MORALES (2013)

Con objeto de conocer la evolución de los procesos sedimentarios en la parte baja del río Verde, Oaxaca, se realizaron mediciones en dos núcleos de sedimentos. El fechado y determinación de la tasa de sedimentación, se realizó utilizando los isótopos radioactivos Plomo-210 y Cesio-137, que sirven como indicadores de períodos de deposición de los últimos 100 años. La velocidad de sedimentación en el Río Verde obtenida por medio del isótopo Pb -210 es 0.69 a 0.89 cm/año. Por otro lado, la velocidad de sedimentación en la zona de estudio mediante el isótopo Cs-137 es del orden de 0.61 cm/año y 0.87 cm/año. El método de Cesio-137 proporciona marcadores distintivos de eventos, mientras que el método de Plomo-210 proporciona pendientes de concentración, que al aplicarse de manera conjunta proporcionan una validación de ambos métodos. En este estudio, los dos métodos coinciden en los valores de sedimentación para la zona del Río Verde. Los resultados de este trabajo permiten conocer la dinámica de los procesos de transporte de sedimentos en la zona, información que resulta útil para la planeación de obras hidráulicas y estimación de los impactos ambientales, así como la implementación de las medidas de mitigación correspondientes.

Article

Sedimentación Datación Isótopos radiactivos Marcadores Morfología de ríos CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA

“We place our hope in the land”: defense of the territory against mining in Ixtacamaxtitlán, Puebla

Veronica Vazquez_Garcia Esteban Martínez Vásquez (2023)

Mexico occupies first place in mining exploration in Latin America, a situation that has caused alarm among native peoples because the implementation of extractive projects threatens their vital space. The objective of this paper is to analyze the actions of Corporate Social Responsibility (CSR) of the Ixtaca Project in Ixtacamaxtitlán, Puebla, as well as the strategies of territorial defense undertaken by the communities to stop its expansion. Data was gathered through one survey, one workshop and various interviews conducted in three communities affected by the project. Results discuss three actions of CSR: 1) job offers; 2) investment in community infrastructure; 3) support for social events. Three main defense strategies were identified: 1) collective agreements refusing to sell water to the company; 2) legal litigations in favor of the right to be consulted as native peoples; 3) the strengthening of peasant agriculture thanks to the defense of the ejido, the conservation of irrigation water and the support received from the federal program Sembrando Vida. The paper concludes that, despite the negative impacts of RCS actions, these strategies have proven effective because mining concessions have been cancelled and some families have returned to agriculture.  

Article

Artículo

native peoples peasantry mining OIT Convention socioenvironmental conflict pueblos originarios campesinado minería Convenio OIT conflicto socioambiental CIENCIAS SOCIALES CIENCIAS SOCIALES

Implementation of a Nickel-Electroless Coating in Heat Exchanger Pipes Considering the Problem of the Environmental Conditions ofthe Cooling Water Without Recirculation to Increase the Effectiveness Under Uncertainty

VICTOR MANUEL ZEZATTI FLORES GUSTAVO URQUIZA BELTRAN MIGUEL ANGEL BASURTO PENSADO LAURA LILIA CASTRO GOMEZ JUAN CARLOS GARCIA CASTREJON (2022)

This research is based on the operation tube heat exchangers, their use and problematic on hydroelectric power plants. It is based on the design heat exchanger tubes for industrial use, which took the parameters of operation, design, working fluids (air and water) and conditions to assemble a monitoring equipment at appropriate scale for the laboratory, with the necessary measurement instruments to analyze the behavior of heat energy transfer by means of thermocouples, the velocity of the air with a hot wire anemometer and the flow of water with a turbine flow meter, in pipes of different materials: copper, steel 1018 and stainless steel 316L, all in ideal conditions, and with this to found a comparative parameter with pipes of the same materials but under conditions of deterioration with the presence of forced oxidation and with the data mining and support vector machine can be minimized the corrosion problems in pipes.

Article

INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS Data mining, Support Vector Machine, Pattern Recognition and Decision Support System, Heat exchangers

OPTIMIZING THE TRANSFER OF ENERGY IN A HEAT EXCHANGER MINIMIZING THE CORROSION PROBLEMS IN PIPES IN A HYDROELECTRIC POWER STATION USING DATA MINING AND SUPPORT VECTOR MACHINE

VICTOR MANUEL ZEZATTI FLORES GUSTAVO URQUIZA BELTRAN MIGUEL ANGEL BASURTO PENSADO LAURA LILIA CASTRO GOMEZ (2019)

This research is based on the operation tube heat exchangers, their use and problematic on hydroelectric power plants. It is based on the design heat exchanger tubes for industrial use, which took the parameters of operation, design, working fluids (air and water) and conditions to assemble a monitoring equipment at appropriate scale for the laboratory, with the necessary measurement instruments to analyze the behavior of heat energy transfer by means of thermocouples, the velocity of the air with a hot wire anemometer and the flow of water with a turbine flow meter, in pipes of different materials: copper, steel 1018 and stainless steel 316L, all in ideal conditions, and with this to found a comparative parameter with pipes of the same materials but under conditions of deterioration with the presence of forced oxidation and with the data mining and support vector machine can be minimized the corrosion problems in pipes.

Article

INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS Data Mining, Support Vector Machine, Pattern Recognition and Decision Support System, heat exchangers.

International Winter Wheat nurseries data: Facultative and Winter Wheat Observation Nurseries and International Winter Wheat yield trials for semi-arid and irrigated conditions

Mesut KESER fatih ozdemir Pietro Bartolini (2022)

Article

Germplasm Exchange International Nurseries Multi-Locations CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA WINTER WHEAT BREEDING GERMPLASM YIELDS DATA

Disruptive approach to integrate data in a digital environment: progress report CIMMYT-Bluenumber 2023

Andrea Gardeazabal (2023)

This report describes the process carried out a pilot project to evaluate a scalable disruptive approach to integrating data for agronomy research that also incentivizes sustainable production and enables traceability using open data sharing protocol with self-sovereign identity (SSI).

Working paper

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA DIGITAL TECHNOLOGY DATA AGRICULTURAL RESEARCH

Digital artifacts reveal development and diffusion of climate research

Bia Carneiro Tek Sapkota (2022)

Article

Accessible Knowledge Impact of Outputs Traditional Bibliometric Analyses Hyperlink Analysis CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CLIMATE DIFFUSION MAIZE MINING ORGANIZATION SOCIAL MEDIA SOCIAL NETWORK ANALYSIS WHEAT TEXT MINING

Product development for Eastern Africa: EA-PP1

&

EA-PP2

Berhanu Tadesse Ertiro Aparna Das Yoseph Beyene Dan Makumbi Manje Gowda Suresh L.M. Anani Bruce Walter Chivasa Vijay Chaikam Juan Burgueño Prasanna Boddupalli (2023)

Conference object

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA PRODUCT DEVELOPMENT TESTING DATA MAIZE

Editorial: Genome wide association studies and genomic selection for crop improvement in the era of Big Data

Alison Bentley Charles Chen Nunzio D'Agostino (2022)

Article

Allele Mining High-Throughput Phenotyping Genomic Estimated Breeding Value CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CROP IMPROVEMENT DNA CHROMOSOME MAPPING GENETIC LINKAGE GENOMES GENOTYPING GERMINATION HEAT STRESS QUALITY CONTROL SINGLE NUCLEOTIDE POLYMORPHISM TRITICUM AESTIVUM GENETIC DIVERSITY (AS RESOURCE) HIGH-THROUGHPUT SEQUENCING

Evaluation of multiple satellite precipitation products for rainfed maize production systems over Vietnam

Paresh Shirsath Dakshina Murthy Kadiyala (2022)

Article

Rainfall Datasets Satellite Rainfall Estimates CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA RAIN RAINFED FARMING DATA SATELLITES