Detection and Classification of Ignitable Liquid Residues in the Presence of Matrix Interferences by Using Direct Analysis in Real Time Mass Spectrometry,

Conventional Gas Chromatography‐Mass Spectrometry (GC‐MS) methods for the analysis of ignitable liquids (ILs) are usually time‐consuming, and the data produced are difficult to interpret. A fast IL screening method using direct analysis in real time mass spectrometry (DART‐MS) is proposed in this study. GC‐MS, QuickStrip DART‐MS, and thermal desorption DART‐MS methods were used to analyze neat ILs and thermal desorption DART‐MS without extraction was used to analyze ILs on five substrates (e.g., carpet, wood, cloth, sand, and paper). Compared to GC‐MS, DART‐MS methods generated different spectral profiles for neat ILs with more peaks in the higher mass range and also provided better detection of less volatile compounds. ILs on substrates were successfully classified (98 ± 1%) using partial least squares discriminant analysis (PLS‐DA) models based on thermal desorption DART‐MS data. This study shows that DART‐MS has great potential for the high‐throughput screening of ILs on substrates.     

A genealogy of hostility: parental alienation in England and Wales

ABSTRACT

This article explores the emergence and development of parental alienation (PA) in England and Wales. It considers the background into which PA first appeared in private law proceedings concerning children in England and Wales, and examines how it progressed in the case law through the changing political and discursive context of private family law from 2000 to the end of March 2019. A clear pattern emerged of, initially, parental alienation syndrome and subsequently PA being raised in family proceedings and in political and popular arenas in response to concerns about and measures to address domestic abuse. The case law revealed a high incidence of domestic abuse perpetrated by parents (principally fathers) who were claiming that the resident parents (principally mothers) had alienated the children against them, which raises questions about the purpose of PA. More recently, a PA ‘industry’ appears to have amassed comprising experts, therapists and lawyers, advocating transfers of children’s care from ‘alienating’ mothers to non-resident fathers, as well as PA therapy for children and parents. While PA has had a chequered history and is not without its critics, it has become part of the discursive repertoire of current family law, with increasingly harsh consequences for women and children.     

How useful are psychometric scores in predicting recidivism for treated sex offenders?

This study examined the relationship between psychometric test scores, psychometric test profiles, and sexual and/or violent reconviction. A sample of 3,402 convicted sexual offenders who attended a probation service-run sexual offender treatment programme in the community completed a battery of psychometric tests pre- and posttreatment. Using Cox regression, posttreatment scores on measures of self-esteem, an ability to relate to fictional characters, and recognition of risk factors were, individually, predictive of recidivism. When psychometric tests were grouped into dynamic risk domains, only the pretreatment scores of the domain labelled socioaffective functioning (SAF) predicted recidivism and added predictive power to a static risk assessment. The number of risk domains that were dysfunctional pretreatment also predicted recidivism outcome; however, this did not add predictive power to a static risk assessment tool. Possible explanations for the superiority of pre- over posttreatment scores in predicting reconviction are discussed, and directions for further research considered.     

On urban homicide: A statistical analysis

A statistical analysis is made of homicide rates in the 50 largest American cities for four different years. It is shown that differences in recent murder growth among the cities can largely be explained as typical random fluctuations about a common trend. It is also found that the changing age profile of the American people explains no more than ten percent of the increase in homicide since 1964. Several mathematical models for future homicide growth are proposed from the analysis, and under each the probability of death by murder and corresponding drop in life expectancy are estimated for individuals born now in each of the 50 cities.