Carlos Mendoza

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In an earlier study in rural Guatemala, 257 households that received flocculant-disinfectant to treat their drinking water had 39% less diarrhea than 257 control households. Three weeks after completion of the study, national marketing of the flocculant-disinfectant was extended into the study communities. Six months later, we assessed frequency of and(More)
In this paper we motivate, deene and illustrate the behavior of four scalar metrics which measure the degree to which microcalciication (Ca++) detection is aaected by lossy compression distortion. The JPEG method is used at various compression rates determined by a single parameter. Our metrics are specifically targeted to measure the degree of invariance(More)
An estimated 1 billion persons in low-income countries do not have access to improved drinking water. Chlorine, a useful water treatment agent, is less effective in turbid water, and lacks a visible effect, limiting its acceptability. A product incorporating precipitation, coagulation, flocculation, and chlorination technology (combined product) to reduce(More)
BACKGROUND We have found that community health workers (CHWs) with appropriate training are able to accurately identify people at high cardiovascular disease (CVD) risk in the community who would benefit from the introduction of preventative management, in Bangladesh, Guatemala, Mexico, and South Africa. This paper examines the attendance pattern for those(More)
The purpose of this study is to develop and test a modification to a previous method of regional seismic event location based on Empirical Green's Functions (EGFs) produced from ambient seismic noise. Elastic EGFs between pairs of seismic stations are determined by cross-correlating long ambient noise time-series recorded at the two stations. The EGFs(More)
History and ideas matter. It is impossible to understand why politicians choose the institutions they do without taking into account the way in which innovation and diffusion of ideas take place. The creation of institutions is, spontaneously or intentionally, the result of a collective enterprise looking for solutions to specific problems. That is, the(More)
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