Analysis of Positive Control STR Experiments Reveals that Results Obtained for FGA,D3S1358, and D13S317 Condition the Success Rate of the Analysis of Routine Reference Samples

About 120,000 reference samples are analyzed each year in the Forensic Laboratory of Lyon. A total of 1640 positive control experiments used to validate and optimize the analytical method in the routine process were submitted to a multivariate exploratory data analysis approach with the aim of better understanding the underlying sources of variability. The peak heights of the 16 genetic markers targeted by the AmpF?STR^® Identifiler^® STR kit were used as variables of interest. Six different 3130xl genetic analyzers located in the same controlled environment were involved. Two major sources of variability were found: (i) the DNA load of the sample modulates all peak heights in a similar way so that the 16 markers are highly correlated, (ii) the genetic analyzer used with a locus‐specific response for peak height and a better sensitivity for the most recently acquired. Three markers (FGA, D3S1358, and D13S317) were found to be of special interest to predict the success rate observed in the routine process.     

Can Stable Isotopes and Radiocarbon Dating Provide a Forensic Solution for Curbing Illegal Harvesting of Threatened Cycads?

Cycads in South Africa are facing an extinction crisis due to the illegal extraction of plants from the wild. Proving wild origin of suspect ex situ cycads to the satisfaction of a court of law is difficult, limiting law enforcement efforts. We investigated the feasibility of using multiple stable isotopes to identify specimens removed from the wild. Relocated and wild specimens from two species in the African genus Encephalartos (E. lebomboensis and E. arenarius) were sampled. ¹⁴C analysis indicated that a ± 30‐year chronology could be reliably obtained from the cycads. For E. arenarius, pre‐relocation tissue was consistent with a wild origin, whereas tissue grown post‐relocation was isotopically distinct from the wild for ⁸⁷Sr/⁸⁶Sr and δ¹⁵N. For E. lebomboensis, δ³⁴S, δ¹⁸O, and ⁸⁷Sr/⁸⁶Sr were different between relocated and control plants, consistent with the >30 years since relocation. Our findings demonstrate the potential for a forensic isotope approach to identify illegal ex situ cycads.     

Working women in France,nineteenth and twentieth centuries. Where,when, and which women were in work at marriage?

We look at women's labour force participation for the whole of France in the nineteenth and twentieth centuries. We study to what extent young women were working at the time of their marriage, in which occupations, and how differences in labour force participation might be explained. Using a sample of 53,451 marriage records from the TRA project, we identify regional and temporal differences in rates of female labour force participation and in types of work in France between 1860 and 1986.We observe rather stable levels of female labour force participation between 1860 and 1950 of about 60 per cent, but higher levels in the second half of the twentieth century. Over time, women started to work across virtually all occupational sectors. Regional differences declined over time but continued to exist in the late twentieth century. We formulate a set of hypotheses to explain which women worked, taking into account their resources, as well as their expectations, in a male-breadwinner-dominated society. The results of our hierarchical logistic analysis indicate that women with fewer parental resources were more likely to work.     

Rethinking the English–Arabic Legal Translation Course: Restructuring for Specific Competence Acquisition

International Journal for the Semiotics of Law - Revue internationale de Sémiotique juridique - The standards for translating texts in specialized fields have become particularly rigorous with...     

Voting in the rain: the impact of rain on participation in open-air assemblies

ABSTRACT

The analysis of how weather conditions influence participation at the ballot and whether bad weather influences ballot decisions has recently gained momentum. This paper analyses the influence of rain on participation in the Landsgemeinde – the main decision-making body of two Swiss cantons, wherein citizens meet on the main square in order to debate and decide bindingly on political matters of all sorts. We rely on a survey with an in-built conjoint experiment that presents citizens with several hypothetical Landsgemeinde situations characterized by randomly varied combinations of weather and other conditions such as outcome favorability, the expected closeness of the vote and the company available during the event. We find that rain not only decreases overall participation but it also lowers participation when votes are expected to be uncontested and for individuals who do not primarily attend the Landsgemeinde for political reasons.     

追溯体系对食品国际贸易的影响分析

食品安全是食品贸易的焦点问题,而追溯体系是保障食品安全性的重要举措。文章从追溯的内涵和种类出发,深入分析追溯体系的产生原因以及对食品国际贸易的影响。研究发现,消费者、企业和政府共同推动了可追溯体系的产生;追溯体系的发展提高了出口产品的竞争力、促进了食品产业链的合作交流与产业内贸易的发展;然而各国追溯体系发展的不平衡也给国际贸易带来挑战,我国作为食品生产和出口大国,也应积极推广追溯体系,提高食品的安全竞争力。     

Estimating the Number of Contributors to Forensic DNA Mixtures: Does Maximum Likelihood Perform Better Than Maximum Allele Count?

Abstract: Determining the number of contributors to a forensic DNA mixture using maximum allele count is a common practice in many forensic laboratories. In this paper, we compare this method to a maximum likelihood estimator, previously proposed by Egeland et al., that we extend to the cases of multiallelic loci and population subdivision. We compared both methods’ efficiency for identifying mixtures of two to five individuals in the case of uncertainty about the population allele frequencies and partial profiles. The proportion of correctly resolved mixtures was >90% for both estimators for two‐ and three‐person mixtures, while likelihood maximization yielded success rates 2‐ to 15‐fold higher for four‐ and five‐person mixtures. Comparable results were obtained in the cases of uncertain allele frequencies and partial profiles. Our results support the use of the maximum likelihood estimator to report the number of contributors when dealing with complex DNA mixtures.