Raman spectroscopy and microspectrophotometry of reactive dyes on cotton fibres: Analysis and detection limits

A collaborative study on Raman spectroscopy and microspectrophotometry (MSP) was carried out by members of the ENFSI (European Network of Forensic Science Institutes) European Fibres Group (EFG) on different dyed cotton fabrics. The detection limits of the two methods were tested on two cotton sets with a dye concentration ranging from 0.5 to 0.005% (w/w). This survey shows that it is possible to detect the presence of dye in fibres with concentrations below that detectable by the traditional methods of light microscopy and microspectrophotometry (MSP). The MSP detection limit for the dyes used in this study was found to be a concentration of 0.5% (w/w). At this concentration, the fibres appear colourless with light microscopy. Raman spectroscopy clearly shows a higher potential to detect concentrations of dyes as low as 0.05% for the yellow dye RY145 and 0.005% for the blue dye RB221. This detection limit was found to depend both on the chemical composition of the dye itself and on the analytical conditions, particularly the laser wavelength. Furthermore, analysis of binary mixtures of dyes showed that while the minor dye was detected at 1.5% (w/w) (30% of the total dye concentration) using microspectrophotometry, it was detected at a level as low as 0.05% (w/w) (10% of the total dye concentration) using Raman spectroscopy. This work also highlights the importance of a flexible Raman instrument equipped with several lasers at different wavelengths for the analysis of dyed fibres. The operator and the set up of the analytical conditions are also of prime importance in order to obtain high quality spectra. Changing the laser wavelength is important to detect different dyes in a mixture.     

Climate resilience in fragile and conflict-affected societies: concepts and approaches

To understand resilience to climate and environmental changes in fragile and conflict-affected societies is particularly important but equally challenging. In this paper, we first develop a conceptual framework to explore the climate-fragility-conflict and climate-resilience-peace nexus. Second, we discuss approaches to promote pathways from climatic changes to peace. We draw on the relevant literature and International Alert's experience in fragile and conflict-affected societies to stress the key role of resilience. To build resilience, climate, development, peacebuilding, and government actors would have to overcome bureaucratic and institutional barriers and cooperate across thematic and regional silos.     

American evangelicals and domestic versus international climate policy

Because a significant portion of the American electorate identify themselves as evangelical Christians, the evangelical position on climate policy is important to determining the role the United States could play in global climate cooperation. Do evangelicals oppose all climate policies, or are they particularly opposed to certain types of policies? We argue that American evangelicals oppose climate policy due to their distrust of international cooperation and institutions, which has been a prominent feature of evangelical politics since the beginning of the Cold War. Using data from the 2011 Faith and Global Policy Challenges survey and the 2010 Chicago Council Global View survey, we find support for the theory. Evangelicals are equally likely to support domestic climate policy as other Americans, but they are significantly less likely to support international treaties on climate cooperation. The findings suggest that proponents of climate policy could win more evangelicals to their side by focusing on domestic action, instead of multilateral negotiations or international institutions.     

How “Standardized” is Standardized? A Validation of Postcranial Landmark Locations

Since the mid‐1990s, osteometrics have been a major aspect in forensic anthropology. However, recent evidence has shown that practitioners have been using differing points to establish certain measurements; namely those involving the clavicle, scapula, ulna, femur, and tibia. Engaging 61 practitioners, this study examined and confirmed how extensive this discord is. The highest consistency rate among practitioners was the scapular breadth (62.3%), followed by the femoral anteroposterior subtrochanteric diameter (55%). All other levels fell below these, particularly the physiological length of the ulna which was the most inconsistently measured bone. Furthermore, these low consistency rates yielded percent mean differences between two and 20% of the measurement length, with ranges averaging 14 mm. In light of these results, it is recommended that the field take steps to improve the standardization of such problematic measurements, including reexamining all measurements currently listed in osteometric texts, reassessing the utility of each, and reissuing a comprehensive guide.     

An Examination of Defendant Sex Disparity in Capital Sentencing: A Propensity Score Matching Approach

Although much prior work has examined the influence of extralegal factors on jury capital sentencing decision-making, the influence of defendant sex has been largely omitted from previous investigations. Using propensity score matching methods, the current study analyzes data from the North Carolina Capital Sentencing Project to examine whether “sex matters” in capital sentencing. Findings demonstrated that prior to matching there was a significant difference in the likelihood of receiving the death penalty for female and male defendant cases; however, after matching cases on an array of legal and extralegal case characteristics, these differences were no longer significant. Further results revealed that male defendants’ cases included different aggravating and mitigating factors than female defendants’ cases and that female defendants had limited “paths” to capital trials. Findings suggest that any apparent sex effects that are observed in capital sentencing stem from real differences in the case characteristics found in female and male defendants’ cases rather than any direct effects of defendant sex on jury decision-making. Study limitations and implications for death penalty research are also discussed.     

Injecting Drug Use and the Performance of Rural Femininity: An Ethnographic Study of Female Injecting Drug Users in Rural North Wales

In this article I explore, through the analysis of ethnographic data, the demands of gender and place as they play themselves out in the lives of female injecting drug users (IDUs) in the rural communities of North Wales. The findings point to the array of role-relationships which women (attempt to) manage whilst also pursuing an IDU career and highlight how living in a rural community of place shapes how women attribute meaning to, and experience, injecting drug use. By incorporating theoretical ideas around gender performativity and gender spatiality, the analysis provides some understanding of how female IDUs construct their ‘risk’ behaviour within their own socially embedded and culturally meaningful discourses. The findings suggest the importance of an understanding of gender and place dynamics in the development of effective intervention strategies.     

The relationship between investigative interviewing experience and open-ended question usage

We present three studies examining the role of prior job experience in interviewing and interviewers' ability to learn open-ended questions during a training program. We predicted a negative relationship such that more experienced interviewers would perform worse after training than less experienced interviewers, and that (irrespective of baseline performance) the more experienced interviewers would improve the least during training. These predictions were made for two reasons. First, specific questions are commonly used in the workplace (i.e. open-ended questioning constitutes new learning). Second, experience in the use of specific questions potentially interferes with newly learned open-ended questions. Overall, our predictions were supported across different participant samples (including police officers specialized in child abuse investigation and social workers from the child protection area), time delays, and modes of training. The results highlight the need for investment in ongoing investigative interviewing training commencing early during professionals' careers, prior to the establishment of long-term habits in the use of specific questions.     

Impact of Intimate Partner Violence on Women’s Mental Health

This study aimed to explore the mental health needs of women residing in domestic violence shelters; more specifically, we aimed to identify commonalities and differences among their mental health needs. For this purpose, qualitative and quantitative data was collected from 35 women from a Midwestern domestic violence shelter. Hierarchical clustering was applied to quantitative data, and the analysis indicated a three-cluster solution. Data from the qualitative analysis also supported the differentiation of women into three distinct groups, which were interpreted as: (A) ready to change, (B) focused on negative symptoms, and (C) focused on feelings of guilt and self-blame.     

Emotional Dysregulation and Negative Affect Mediate the Relationship Between Maternal History of Child Maltreatment and Maternal Child Abuse Potential

Risk for committing child abuse is frequently attributed to an intergenerational “cycle of violence” through which abuse as a child increases risk for committing abuse as a parent. While this hypothesis has support, more research is needed to understand the factors that account for this pattern of risk. Given literature suggesting that adults with a history of child maltreatment have increased risk for a wide range of psychopathology, this study examined the role of two behavioral endophenotypes, emotional dysregulation and negative affect, in the association between maternal experiences of childhood maltreatment and maternal child abuse potential among 83 low-income, primarily African-American mothers of elementary school age children. Results indicate that a mother’s experience of abuse as a child predicts later risk for abusive parenting as measured by child abuse potential scores. However, our data also indicate that the relationship between maternal experience of child abuse and later child abuse potential is mediated by maternal emotional dysregulation and negative affect.