Citizen experts in environmental risk

In the last two decades, public administrators have increasingly faced groups of people with opposing views about the risks of exposure to environmental contaminants. Because of a series of intriguing studies on risk perception, the situation is frequently seen, by scholars and administrators alike, as a conflict between experts and citizens, and risk communication guidelines are based on this interpretation. But the citizen-expert dichotomy appears fallacious when it is examined in light of the ways citizens actually participate in environmental policy making. The dichotomy overlooks the fact that citizens express their perception of risk largely through organized citizen groups, and that these groups employ and have access to many experts. This essay uses a mainstream environmental group and a number of grassroots environmental groups to illustrate the point. It concludes that the more important conflict is between experts who find environmental pollution safe and those who find it hazardous.     

Case report: Identification of skeletal remains using short-amplicon marker analysis of severely degraded DNA extracted from a decomposed and charred femur

Applying two extraction protocols to isolate DNA from a charred femur recovered after a major forest fire, a range of established and recently developed forensic marker sets that included mini-STRs and SNPs were used to type the sample and confirm identity by comparison to a claimed daughter of the deceased. Identification of the remains suggested that the individual had been dead for 10 years and the DNA was therefore likely to be severely degraded from the combined effects of decomposition and exposure to very high temperatures. We used new marker sets specifically developed to analyze degraded DNA comprising both reduced-length amplicon STR sets and autosomal SNP multiplexes, giving an opportunity to assess the ability of each approach to successfully type highly degraded material from a challenging case. The results also suggest a modified ancient DNA extraction procedure offers improved typing success from degraded skeletal material.     

Analysis of 16 Y-chromosomal STRs in an African descent sample population of Chocó (Colombia)

We studied and established a database and some parameters of forensic importance were calculated of 16 Y-STR (DYS19, DYS385, DYS389I/II, DYS390, DYS391, DYS392, DYS393, DYS437, DYS438, DYS439, DYS460, DYS461, GATA-A10, GATA-H4 and DYS635) in a population of 298 unrelated males of African descent of Chocó (Colombia) and a total of 257 haplotypes were identified using the present set of Y-STR markers, of which 224 were represented only once in the database. Twenty-six haplotypes were presents two times, six haplotypes were presents in three individuals and one haplotype in four men. The haplotype diversity was 0.9987 ± 0.0004. By combining the allelic states of the 16 Y-chromosomal STRs we could construct highly informative haplotypes that allowed the discrimination of 86.2% of the samples tested. With this work we established a database of Y-STR and some parameters of forensic importance. This approach represents a very powerful tool for individual identification and paternity testing in forensic genetic.     

非对称战争与国际人道法

一、引言 在过去的十年里，“军事事务变革”的观念引起了军事思想家们的注意，“不对称”已成为当前的流行用语。但是，不对称很难表示一种本质上新的行动模式，因为在战争的某些特性方面，