نتایج جستجو برای: geographic distribution mapping
تعداد نتایج: 848725 فیلتر نتایج به سال:
Descriptive review of geographic mapping of severe acute respiratory syndrome (SARS) on the Internet
From geographic mapping at different scales to location-based alerting services, geoinformatics plays an important role in the study and control of global outbreaks like severe acute respiratory syndrome (SARS). This paper reviews several geographic mapping efforts of SARS on the Internet that employ a variety of techniques like choropleth rendering, graduated circles, graduated pie charts, buf...
The problem of the distribution of dairy products, which is classified as a combinatorial optimization problem, cannot be solved in polynomial time. In this paper, an algorithm based on Ant Colony Hybrid meta-heuristic system and Geographic Information System (GIS) was used to find a near-optimal solution to this problem. Using the former method, the nearest neighbor heuristic algorithm was use...
Marine taxa are threatened by anthropogenic impacts, but knowledge of their extinction vulnerabilities is limited. The fossil record provides rich information on past extinctions that can help predict biotic responses. We show that over 23 million years, taxonomic membership and geographic range size consistently explain a large proportion of extinction risk variation in six major taxonomic gro...
results of 1818 hcv rna positive samples, hcv genotypes pcr fragments were detected in 1552 (85.5%) samples. hcv genotype 3a was the predominant genotype (39.4%) followed by genotype 2a (24.93%). hcv genotype 3 was the predominant genotype in punjab and sindh regions, while genotype 2 was the most predominant genotype in khyber pakhtunkhwa region and the second predominant genotype after genoty...
BACKGROUND There is no comprehensive database of pediatric anesthesiologists, their demographic characteristics, or geographic location in the United States. METHODS We endeavored to create a comprehensive database of pediatric anesthesiologists by merging individuals identified as US pediatric anesthesiologists by the American Board of Anesthesiology, National Provider Identifier registry, H...
Aiming at the shortcomings of current Canny edge detection method in terms noise removal, threshold setting, and recognition, this paper proposes a for improving by geo-information mapping. The traditional are analyzed using optimal criterion Tobler's First Law, which points out direction optimization difference between properties properties. property characteristics spatial distribution rules ...
Standard measures of poverty concentration based on census tracts may not accurately reflect neighborhood conditions because they offer a weak link to the underlying geography of a neighborhood. Changes in the spatial configuration of land use within a census tract can have the effect of increasing or decreasing the density of poverty. This study uses a dasymetric mapping technique in a raster ...
BACKGROUND Leptospirosis has recently been discussed as an emerging infectious disease in many contexts, including changes in environmental drivers of disease transmission and the emergence of serovars. In this paper, we report the epidemiology of leptospiral serovars from our study of human leptospirosis in American Samoa in 2010, present evidence of recent serovar emergence, and discuss the p...
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