Portable high‐resolution automated 3D imaging for footwear and tire impression capture

The forensic science community raised the need for improved evidence recognition, collection, and visualization analytical instrumentation for field and laboratory use. While the 3D optical techniques for imaging static objects have been extensively studied, there is still a major gap between current knowledge and collecting high‐quality footwear and tire impression evidence. Among optical means for 3D imaging, digital fringe projection (DFP) techniques reconstruct 3D shape from phase information, achieving camera‐pixel spatial resolution. This paper presents a high‐resolution 3D imaging technology using DFP techniques dedicated to footwear and tire impression capture. We developed fully automated software algorithms and a graphical user interface (GUI) that allow anyone without training to operate for high‐quality 3D data capture. We performed accuracy evaluations and comparisons comparing with the commercial high‐end 3D scanner and carried out qualitative tests for various impressions comparing with the current practices. Overall, our technology achieves similar levels of accuracy and resolution with a high‐end commercially available 3D scanner, while having the merits of being (1) more affordable; (2) much easier to operate; and (3) more robust. Compared with the current practice of casting, our technology demonstrates its superiority because it (1) is non‐destructive; (2) collects more evidence detail than casts, especially when an impression is fragile; (3) requires less time and money to collect each piece of evidence; and (4) results in a digital file that can easily be shared with other examiners.     

Estimating Individual Contributions to Complex DNA SNP Mixtures.,

High‐throughput sequencing (HTS) of large panels of single nucleotide polymorphisms (SNPs) provides an alternative or complimentary approach to short tandem repeats (STRs) panels for the analysis of complex DNA mixture forensic samples. For STRs, methods to estimate individual contribution concentrations compare capillary electrophoresis peak heights, peak areas, or HTS allele read counts within a mixture. This article introduces three approaches (mean, median, and slope methods) for estimating individual DNA contributions to forensic mixtures for HTS/massively parallel sequencing (MPS) SNP panels. For SNPs, the major:minor allele ratios or counts, unique to each contributor, were compared to estimate contributor proportion within the mixture using the mean, median, and slope intercept for these alleles. The estimates for these three methods were typically within 5% of planned experimental contributions for defined mixtures.     

EU issue voting and the 2014 European Parliament elections: a dynamic perspective

EU issue voting in European Parliament elections has been shown to be highly conditional upon levels of EU politicization. The present study analyzes this conditionality over time, hypothesizing that the effect of EU attitudes on EP vote preferences is catalyzed as EP elections draw closer. In contrast to extant cross-sectional post-election studies, we use a four-wave panel study covering the six months leading up to the Dutch EP elections of 2014, differentiating between party groups (pro, anti, mixed) and five EU attitude dimensions. We find that EU issue voting occurs for both anti- and pro-EU parties, but only increases for the latter. For mixed parties we find no effect of EU attitudes, yet their support base shifts in the anti-EU direction as the elections draw closer. The overarching image, however, is one of surprising stability: EU attitudes form a consistent part of EP voting motivations even outside EP election times.     

Why electoral reform might improve representation and why it might make it worse

The debate over electoral reform has largely focused on representation in Parliament. However, the government largely controls policy‐making in parliamentary systems like Canada. This article shows that a more proportional system would increase the likelihood of coalitions. Because the dominant approach to studying representation in government, ideological congruence, suggests that reforming the electoral system would make no change to the level of representation, this article focuses instead on the representation of party preferences. It shows that multi‐party cabinets, common under proportional systems, involve a trade‐off between including more citizens’ preferred parties in government, while reducing the overall level of party preference representation.     

Militarism,states and resistance in Africa: exploring colonial patterns in stabilisation missions

ABSTRACT

The article explores how stabilisation missions reproduce the patterns that constituted colonial states. Following African historiography, the article argues that stabilisation’s militarised approach to neutralising resistance, its racialisation of targets and its aim to constitute and reform state authority evoke how colonial states were forged by the inseparable relationship between authority, force, race, production and resistance. However, it will be shown that those patterns cannot be fully understood without an account of the broader structure of coloniality and imperialism. In so doing, the article aims to contribute to bring together different literatures on contemporary peace-building interventions and contemporary militarism by examining the relation between militarism, coloniality and imperialism. It focuses on the Democratic Republic of Congo to show how an intensified use of force against resistance, added to frames that see Congolese politics as deviant, has guided the goal of restoration of state authority, and with it, different economic reforms, all of which have reinforced the military and economic power of national and international elites, without reporting significant benefits to the population at large.     

L'offre active de services de santé mentale en français en Ontario et au Manitoba : les rôles clés des instruments et des outils

This article is based on the results of a survey carried out in 2019 to document health managers and professionals’ knowledge concerning their linguistic obligations and the tools promoting active offer in the field of mental health in French, in Ontario and Manitoba. The working hypothesis is that knowledge of the obligations and available tools can contribute to a successful offer of services in French. The more professionals and managers understand their obligations, the more tools they can use to fulfill them. The study shows that there is indeed a link between knowledge of obligations and the use of tools to provide an active offer of mental health services in French. It also highlights the key role of tools to provide French services actively.