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81.
Rogers Adam A. Padilla-Walker Laura M. McLean Ryan D. Hurst Jeffrey L. 《Journal of youth and adolescence》2020,49(1):136-149
Journal of Youth and Adolescence - Theory and research indicate considerable changes in parental control across adolescence (e.g., declining behavioral control), but the developmental course and... 相似文献
82.
Christopher V. Hawkins 《国际公共行政管理杂志》2020,43(7):563-572
ABSTRACTIn the United States, competition among cities for economic development tends to be the norm. Cities are also collaborating more to improve their economic advantage. However, transaction costs inhibit various of interlocal agreements from being formed. This study examines the role of multilateral institutions in facilitating interlocal agreements for economic development. An analysis of survey data collected from city governments in eleven US metropolitan areas highlights the importance of regional institutions in moderating the effect of coordination problems on the formation of developmental joint venture agreements. The findings complement extant research on the governance mechanisms that mitigate transaction costs of collective action. 相似文献
83.
Youngmin Kim M.S. Won-sil Choi Ph.D. Byoungjun Jeon B.S. Tae Hyun Choi M.D. Ph.D. 《Journal of forensic sciences》2020,65(2):458-464
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. 相似文献
84.
Ayşegül Erdoğan Ph.D. Meral Esen Ph.D. Robin Simpson Ph.D. 《Journal of forensic sciences》2020,65(5):1730-1735
X-ray photoelectron spectroscopy (XPS) is a widely used technique to characterize the surface chemistry of materials. It plays a crucial role in accessing qualitative and quantitative information and in detecting the presence of chemical functional groups on the surface of any material. The forensic methods available to detect and identify elements and organic/inorganic compounds are often destructive, so evidence cannot be re-analyzed. However, XPS allows rapid analysis of samples without damaging them. Recently, an increasing number of forensic researchers have begun to study certain chemical information on fingermarks. In this study, the authors aimed to present the applicability and power of XPS imaging in fingermark analysis which can also provide specific information about the fingermark chemical composition. Herein, monochromated X-ray (Al Kα) spot size was fixed at 50 μm. XPS mapping resulted in the acquisition of spectra at each pixel, in an array of 41 × 30 pixels with a step size of 50 μm. Then, a simple discussion has been made about how the scanned surface spectrum and basic snapshot spectra are used to identify different components at a fingertip of a scanned surface area (~3 mm2). Hence, a fingermark pattern contaminated with caffeine, TiO2, and Pb/PbO deposited on the silicon wafer can be chemically mapped and visualized by XPS using principal component analysis (PCA). Thus, the present study showed the possible applicability of XPS for the identification of illicit drugs of abuse, gunshot residue, and skin care products on latent fingermark by mimicking a crime scene evidence. 相似文献
85.
Oliver P. Richmond 《Third world quarterly》2020,41(2):207-227
Abstract1Recently there have been calls from policymakers around the world for practically engaged research to produce evidence-based policy for peace, security and development. Policymakers aim to align three types of methodological approaches to knowledge about peace, security and development in international order: methodological liberalism at state and international levels, aligned with ‘methodological everydayism’ in order to constrain methodological nationalism. Policy operates through broad forms of intervention, spanning military, governmental and developmental processes, which scholarship is expected to refine. Critical scholarship is sensitive about the subsequent ‘interventionary order’, often connecting methodological everydayism with global justice frameworks rather than methodological nationalism or liberalism.
86.
87.
Reina C. Neufeldt Mary Lou Klassen John Danboyi Jessica Dyck Mugu Zakka Bako 《Third world quarterly》2020,41(7):1103-1121
ABSTRACTThe emphasis on local or hybrid efforts in peacebuilding literature brings front and centre the importance of being rooted within a particular context, with leadership and vision for social change and justice proffered by local actors. This is the same emphasis found in development literature and a necessary foundation for transformation. Scholars and practitioners nevertheless also note a role for outsiders in supporting local efforts (eg Lederach in 2005). Yet a significant challenge arises for outsiders, and to some extent local actors: how do you know what was tried or is underway that you might support or from which you might learn? This paper reports findings from a collaborative research project that examined the gap between the practice of peacebuilding locally and internationally available ‘knowledge’ via publications produced on local peacebuilding in Jos, Nigeria, between 2001 and 2008. It identifies a staggering gap between efforts and knowledge in the form of publications. The paper discusses the implications of the findings in terms of what it means for outsiders when thinking about helping resource local transformation efforts. 相似文献
88.
When a bullet punctures a surface, it leaves behind a bullet impact, which can be analyzed in order to determine the origin and trajectory path from which a bullet was discharged using many different scientific methods to reconstruct a shooting scene. The purpose of the research was to test the accuracy and repeatability of reconstructing the impact angle of single bullet impacts using the ellipse method. The research was conducted by firing various calibers of ammunition into drywall panels positioned at varying angles of incidence from 88° until ricochet occurred. This was done in order to determine which caliber type and angle of incidence are most accurate and precise for reconstructing a shooting scene. The study examined four caliber types fired into drywall panels, with 5 repeated shots for each of the 11 angles of incidence (n = 220). Furthermore, 31 participants partook in the study to estimate a bullet impact angle of incidence utilizing the ellipse method. The results show that the best performance (accuracy and repeatability) is seen with the measurements of the 0.45 caliber ammunition. When angle of incidences is low (<64°), the performance (accuracy and repeatability) was seen to be better in all caliber ammunitions. Overall, the data provided for single bullet impacts deposited in drywall show that the ellipse method is useful in providing measurements for most crime scene reconstruction purposes and has also demonstrated that results vary depending on the type of ammunition, firearm, and angle of incidence being examined. 相似文献
89.
Charlotte Murphy Ph.D. June Kenna M.Sc. Lorna Flanagan Ph.D. Marce Lee Gorman B.Sc. Clara Boland Ph.D. Jennifer Ryan Ph.D. 《Journal of forensic sciences》2020,65(2):399-405
This study is the first to examine the background level of male DNA on underpants worn by females in the absence of sexual contact. Here, we examined 103 samples from the inside front of underpants from 85 female volunteers. Samples were examined for the presence of male DNA using NGM SElect and PowerPlex Y23 kits. Only five samples gave a “complete” Y-STR profile, even though 83.5% of our volunteers cohabited with a male. In all cases where a partner reference sample was available, the Y-STR profile matched the cohabiting partner. We have demonstrated that a Y-STR profile is not expected on the inside front of underpants worn by females after social contact alone. The results of this study are informative for evaluating the significance of a Y-STR profile on underpants in cases of alleged sexual assault. 相似文献
90.
Yoshinori Nishiwaki Ph.D. Sadao Honda M.S. Takuma Yamato M.S. Ryosuke Kondo M.S. Atsunori Kaneda M.S. Shinjiro Hayakawa Ph.D. 《Journal of forensic sciences》2020,65(5):1474-1479
In this study, the nondestructive differentiation of individual white polyester clothing fibers was accomplished via synchrotron radiation microbeam X-ray fluorescence (SR-μ-XRF) analysis. SR-μ-XRF with vertical focusing is a useful nondestructive method for the analysis of a single polyester clothing fiber. Kirkpatrick–Baez (KB) mirror was used to vertically focus 20 keV X-rays for the analysis of 22 individual white polyester fibers taken from clothing commonly sold in Japan. SR-μ-XRF with a vertical focused 2 μm (V) × 300 μm (H) beam was approximately 12.8 times more sensitive than SR-XRF with an unfocused 300 μm (V) × 300 μm (H) beam for the detection of elements in single fibers. The minimum detection limits (MDLs) of the SR-μ-XRF method were 8.15 ppm for Cl and 0.06 ppm for Br. In addition to Ti in TiO2 delustering agents, Zr and Nb impurities in the delustering agents were detected in individual fibers. Sb from a polymerization catalyst and Co from a transesterification catalyst were also detected in individual fibers. Comparing the Ti Kβ/Sb Lα,β and Zr Kα/Nb Kα X-ray intensity ratios was a useful way to distinguish individual clothing fibers, and 98% of the fibers were differentiated when additional trace elements were used as discrimination indicators. 相似文献