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Re-emerging threat of Trypanosoma cruzi vector transmission in El Salvador, update from 2018 to 2020

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Infectious Diseases of Poverty 2022年第4期11卷 101-102页

作者： Marvin Stanley Rodriguez Yuko Nitahara Michelle Cornejo Kevin Siliezar Rafael Grande Ana Gonzalez Kotaro Tasaki Yu Nakagama Yu Michimuko Yoko Onizuka Junko Nakajima-Shimada Jose Eduardo Romero Jose ricardo palacios Carmen Elena Arias Wilam Mejia Yasutoshi Kido ricardo Cardona Alvarenga Department of Virology and Parasitology Graduate School of MedicineOsaka Metropolitan University1-4-3 Asahi-machiAbeno-kuOsaka 545-8585 Japan 不详

Background:Since the late twentieth century,Chagas disease gained global attention to suppress the vector burden as a main control strategy in endemic *** Central America,multi-national initiative successfully achieved significant reduction in the estimated disease prevalence as well as elimination of the region's principal vector species at the time in *** the last decade has witnessed significant changes in ecosystem-such as urbanization and replacement of the main vector species-that can possibly affect the vector's habitation and residual transmission,the up-to-date vector burden in the region has not been evaluated thoroughly due to the cessation of active vector *** aim of this study was to update the risk of vector-borne Trypanosoma cruzi infection in El Salvador,the top Chagas disease-endemic country in Central ***:A nationwide vector survey was conducted in the domestic environment of El Salvador from September 2018 to November *** selection of the houses for inspection was based on expert purposeful *** for *** was examined by microscopic observation of the insects'feces,followed by a species confrmation using *** data were analyzed using R software version *** estimates with 95%confidence intervals were inferred using the Jeffrey's method provided under the epiR ***:A total of 1529 Triatoma dimidiata was captured from 107 houses(infestation rate,34.4%;107/311)in all the fourteen departments of the country visited within the period;prevalence of *** infection was as high as 10%(153/1529).In the country,domestic *** infestation was distributed ubiquitously,while *** infection rates varied across the *** out of fourteen departments showed higher infection rates than the average,suggesting sporadic high-risk areas in the ***:Our comprehensive study revealed substantial *** infection of *** across the country,in

关键词： Chagas disease Vector transmission Triatomine Trypanosoma cruzi Triatoma dimidiata

Trends in Nitrate Concentrations and Determination of its Origin Using Stable Isotopes (^(18)O and ^(15)N) in Groundwater of the Western Central Valley,Costa Rica

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AMBIO－人类环境杂志 2006年第5期35卷 229-236页

作者： Jenny Reynolds-Vargas Julio Fraile-merino ricardo Hirata 丁莉（译）环境水文学实验室圣保罗大学不详

本研究对哥斯达黎加中西部山谷蓄水层地下水中的硝酸盐浓度的长期变化趋势进行了评估，并采用稳定性同位素（^18ONO3^-和^15NNO3^-）技术设法识别其来源。该地区有超过100万人口依赖地下水满足日常需求。来自20个地点在4～17年的时间内... 详细信息

本研究对哥斯达黎加中西部山谷蓄水层地下水中的硝酸盐浓度的长期变化趋势进行了评估，并采用稳定性同位素（^18ONO3^-和^15NNO3^-）技术设法识别其来源。该地区有超过100万人口依赖地下水满足日常需求。来自20个地点在4～17年的时间内定期采集的样品的数据表明有5个地点的硝酸盐浓度呈现增长的趋势，这些地点在未来10到40年的时间内将会超过推荐最大浓度。同位素分析的结果表明了土地利用方式和地下水中硝酸盐的同位素特征之间的相关性，并且显示缺乏相应废水处理系统的城市化进程，以硬咖啡种植固的施肥操作，正在威胁着该地区的水质。我们得出的结论是该区域的地下水管理并不是可持续的，土地利用方式从农业活动到不具备适当污水排放系统的生活居住的变化过程可能导致硝酸盐污染物负荷的显著增长。

关键词：硝酸盐浓度地下水管理稳定性同位素哥斯达黎加中西部山谷土地利用方式并用

Influence of Soil Physical Properties on Grapevine Yield and Maturity Components in an Ultic Palexeralf Soils, Central-Southern, Chile

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Open Journal of Soil Science 2014年第4期4卷 127-135页

作者： Celerino Quezada Maria A. Soriano José Díaz ricardo merino Alejandro Chandía Jorge Campos Marco Sandoval Department of Agronomy University of Cordoba Cordoba Spain Faculty of Agronomy University of Concepcion Chillan Chile

The effects of soil physical properties on yield components, grape quality and grapevine yield cv. Cabernet Sauvignon in Ultic Palexeralf soils located in Central Southern Chile were assessed. The experimental design was completely randomized with three treatments of soil texture: clayey, sandy clay and clayey loam. The higher yield was obtained in the sandy clay and clayey loam soils. The increase of bulk density, penetration resistance and clay content decreased the number of clusters per vine, number of berries per cluster and grapevine yield. Soil texture had not effects on the yield of shoots, berry diameter and total acidity. However, soluble solids were higher in the clayey soil. Shoot orientation only had positive effects on the cluster weight, number of berries per cluster, and grapevine yield, being higher in the upward shoots. This research remarked the importance of soil physical properties on the selection of sites with viticultural aptitude.

关键词： Penetration Resistance Bulk Density Vineyard Upward Shoots

Improving N Calculation of the RSI Financial Indicator Using Neural Networks

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Improving N Calculation of the RSI Financial Indicator Using...

Water Flow Path Characterization in Shallow Vadose Zone Using Tensiometers

2010 2nd IEEE International Conference on Information and Financial Engineering(ICIFE2010)

作者： Alejandro Rodríguez-González Fernando GuldrisIglesias ricardo Colomo-palacios Giner Alor-Hernandez Ruben Posada-Gomez Computer Science Department Universidad Carlos Ⅲ de Madrid Leganés Spain

Trading and Stock Behavioral Analysis Systems require efficient Artificial Intelligence techniques for analyzing large financial datasets and have become in the current economic landscape a significant challenge for multidisciplinary ***,Trading-oriented Decision Support Systems based on the Chartist or Technical Analysis Relative Strength Indicator（RSI） have been published and used ***,its combination with Neural Networks as a branch of evolutionary computing which can outperform previous results remain a relevant approach which has not deserved enough *** this paper,we present the Chartist Analysis Platform for Trading（CAST,in short） platform,a proof-of-concept architecture and implementation of a Trading Decision Support System based on the RSI N value calculation and Feed-Forward Neural Networks（FFNN）.CAST provides a set of relatively more accurate financial decisions yielded by the combination of Artificial Intelligence techniques to the N calculation for RSI and a more precise and improved upshot obtained from feed-forward algorithms application to stock value datasets.

关键词： neural networks RSI trading prediction

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Journal of Water Resource and Protection 2017年第9期9卷 1082-1096页

作者： Mohammad Hassan Rezaie-Boroon Omar Acosta Rodrigo Chipres Cheryl Cox Frank Diemel Norman Ho Shaonan Li ricardo Lopez Matthew Luque Mayra Martinez Dennis palacios James Wright Geosciences and Environment Department California State University Los s Angeles USA

In this project, we will present the findings of a study using Tensiometer systems designed to investigate the water flow path pattern in shallow vadose zone. The purpose of this paper is to evaluate water flow path in shallow vadose zone and to calculate the infiltration rate and hydraulic conductivity of a soil using Tensiometer. We have measured the subsurface water flow paths in sandy clay loam soil following infiltration experiment using Tensiometers. The matric potential and hydraulic conductivity measurements show that subsequent infiltration and water movement in unsaturated (vadose) zone are vertical, but it can have large lateral component under steady condition. This shows that water moves generally from high water content to lower water content region. Average pressure head for the percolation test conduction locations EB and HB was -30 and -80 cm respectively. Hysteresis produces another interesting situation when the soil is drained. We found that the wetter portion of the soil in vadose zone could be at a lower potential (head) than the dryer portions, resulting in lateral driving force for a preferential flow of water from the dryer to the wet soil. The infiltration rate for the 5 cm ponded water was calculated at 5.45 cm/hr. The infiltration rate curve shows that the rate of infiltration decreases with the time. When infiltration first starts, the wetting front is steep and very close to the surface. Similarly, due to the pressure head gradient, large value for infiltration is recorded. Under these conditions, we believe that the gradient in pressure head is responsible for the rapid movement of water into the dry soil. The effect of gravity is less on water during the initial stages of infiltration;however, it is more effective for preferential flow pattern. In the latter infiltration event, the wetting front has moved deeper into the soil. As a result, the pressure head gradient at the surface is much smaller and consequently has little effect. Wh

关键词： Tensiometer Water Pollution Contamination Migration Infiltration Vadose Zone