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.     

The Effect of Temperature and Exposure Time on Stability of Cholesterol and Squalene in Latent Fingermarks Deposited on PVDF Membrane

Cholesterol and squalene are fatty materials of latent fingermarks that can be utilized for dating methodologies and visualization techniques. Previous studies have suggested these compounds undergo degradation in fingermarks as a function of time (days) and light at ambient temperature. However, studies assessing how their composition changes at low and high temperatures over short periods of time (hours) have not been published previously. Here, we performed quantitative analysis of cholesterol and squalene in natural fingermark residue using PVDF membrane, after exposure to a range of temperatures (−20 to 100°C) for 4 and 8 h. We found that levels of both fatty materials remained constant at −20 to 60°C, but both showed significant reduction at 100°C, over short exposure times. These results indicate that cholesterol and squalene are detectable at −20 to 60°C, whereas at 100°C or higher, both are lost due to rapid thermal degradation.     

Direct Democracy and Women's Political Engagement

What are the conditions that promote gender equality in political participation? In this article, I propose that the presence of direct democracy expands gender equality in political participation by signaling the system's openness to women's voice, confirming their political competency, and highlighting their stake in political decisions. To test this argument, I leverage a quasi‐experiment in Sweden in the aftermath of the introduction of universal suffrage, where the type of municipal political institutions was determined by a population threshold. My findings lend strong support to the effect of direct democracy on the political inclusion of women. I find that the gender gap in electoral participation was smaller in municipalities using direct democracy than in similarly sized municipalities that only had representative institutions.     

What matters to citizens in crisis recovery? Being listened to,action, and confidence in government

Policy Sciences - The policy decision-making process in the aftermath of a crisis is a dynamic and iterative process involving circumstances that are emotionally convoluted rather than stable and...     

Measuring the Growth of the Nonprofit Sector: A Longitudinal Analysis

Scholars have examined the effects of various environmental factors on the nonprofit sector to elucidate the role of nonprofits in modern society. However, researchers report a paucity of information on nonprofit growth using longitudinal data, especially outside the United States. This article analyzes 40 years of political, economic, and sociodemographic data in South Korea to test theories of nonprofit growth and to determine whether the concepts and theories developed for Western societies can be successfully applied in South Korea. The results show that demand‐ and supply‐side economic theories account for variations in nonprofit growth, but the existing socioeconomic explanations fail to recognize the political influences on nonprofit development. Nonprofit organizations have emerged from social and economic necessity but have also been nurtured within a political framework.     

全球领导力发展与国际青年交流项目的关系

本文介绍了青年全球领导力发展的影响因素,指出这些因素与国际交流的关系,从而提出国际交流项目的实施对青年全球领导力形成的促进作用,并通过文献研究及问卷调查,对全球领导力发展与国际青年交流项目的关系进行了定一量分析,得出二者的正相关关系,认为应该为本国青年提供多领域、专门化的国际交流项目,以促进青年全球意识的形成.     

Potential Forensic Application of Receptor for Advanced Glycation End Products (RAGE) as a Novel Biomarker for Estimating Postmortem Interval

Studies which estimate the postmortem interval (PMI) based on diatoms or bacterial communities have been well‐conducted. However, predicting the PMI based on microorganisms has limited accuracy. The objective of this study was to discover specific biomarkers for estimating the PMI for drowning. The in vivo experimental model consisted of rats classified into nine groups (seven drowned groups from Day 1 to Day 7 and two control groups). Their lung tissues were analyzed for the receptor for advanced glycation end products (RAGE) mRNA expression determined by qRT‐PCR. RAGE protein levels were determined by Western blotting and immunohistochemical (IHC) staining. RAGE mRNA and protein levels gradually degraded over time. Immunostaining analysis revealed that RAGE in the Day 1 sample was significantly higher than that in the Day 6 or Day 7 samples. These results indicate that RAGE in drowned lungs could be a potential biomarker for the determination of the PMI after drowning.