Total Ion Spectra versus Segmented Total Ion Spectra as Preprocessing Tools for Gas Chromatography – Mass Spectrometry Data

Alignment of fire debris data from GC‐MS for chemometric analysis is challenged by highly variable, uncontrolled sample and matrix composition. The total ion spectrum (TIS) obviates the need for alignment but loses all separation information. We introduce the segmented total ion spectrum (STIS), which retains the advantages of TIS while retaining some retention information. We compare the performance of STIS with TIS for the classification of casework fire debris samples. TIS and STIS achieve good model prediction accuracies of 96% and 98%, respectively. Baseline removal improved model prediction accuracies for both TIS and STIS to 97% and 99%, respectively. The importance of maintaining some chromatographic information to aid in deciphering the underlying chemistry of the results and reasons for false positive/negative results was also examined.     

A Brief History of Personality Assessment in Police Psychology: 1916–2008

Since the 1960s, the application of psychological services and research to law enforcement settings (known as “police psychology”) evolved from being practically nonexistent to almost universal in a relatively short period of time (Scrivner 2006). Currently, psychologists provide a variety of services to law enforcement agencies, including performing evaluations for pre-employment selection, “fitness-for-duty” evaluations (FFDE), and counseling/treatment for psychologically troubled officers and first responders. The extensive use of personality assessment instruments in police psychology is not surprising given the fact psychologists have traditionally concerned themselves with issues of psychological measurement and test construction. In the contemporary practice of police psychology, assessment using personality measures is essential, being utilized in all of the abovementioned evaluations, in addition to other occasional applications (Weiss et al. 2008). This article provides a brief history of personality assessment in police and public safety psychology as it developed from 1916 to 2008.     

Critical Review of Research Evidence of Parenting Coordination's Effectiveness

Parenting coordination (PC) has been in use since the mid‐1980s, but research on its effectiveness is sorely lacking. We review the extant research organized by three themes: (1) parenting coordinators’ perceptions of their role and function; (2) professionals’ and parents’ views and perceptions of PC; and (3) outcomes of PC, including some measures of effectiveness of the PC process. While these studies provide some insight into PC effectiveness, there is still a lack of research that uses objective outcome measures of efficacy and that considers characteristics of the co‐parent dyad, personality difficulties, or the professional discipline of the parenting coordinator. Future research recommendations are discussed.     

Adapting the environmental impact statement process to inform decision makers

The environmental impact statement (EIS) process is central to the assessment of environmentally significant actions. Yet decisions about what matters in the environment and what gets studied as part of an EIS are based on values that are largely implicit and come primarily from technical experts. In this article we propose using the techniques of decision analysis (DA) to articulate values explicitly and make the EIS process more effective as an aid to decisionmakers in developing defensible environmental policies. We identify five major sources of problems with the current EIS approach, propose a new environmental decision process that incorporates DA in the EIS framework, and consider the merits, problems, and feasibility of implementing the suggested policy improvements.     

The effect of time after body discovery on the accuracy of retrospective weather station ambient temperature corrections in forensic entomology

Weather station data are used by forensic entomologists to estimate ambient temperatures at body discovery sites. Correlation data from sites may also be collected to correct for site and station differences. This experiment tested the accuracy over time of retrospective weather data correction using linear regression between stations and sites. Temperatures were logged at six hypothetical body discovery sites during a seven-day period for which a hypothetical body lay in situ, and a further four correlation periods. The accuracy of weather data for hypothetical body in situ periods improved after correction in 22 of 24 correlations; however, mean predicted body in situ temperatures for sites differed significantly between correlation periods. Predicted temperatures generally rose with time after body removal, which correlated with rising site temperatures accompanying seasonal change. Therefore, practitioners should be cautious in making correlations if weather patterns during correlation differ greatly from those while the body was in situ.     

Drug abuse's smallest victims: in utero drug exposure

The social and economic impact of drug use on our global population continues to increase leaving no geographical, social or cultural group untouched. The National Institute on Drug Abuse (NIDA), in one of the few large surveys of maternal abuse, found that 5.5% of mothers reported taking an illicit substance during gestation. These figures certainly are underestimates due to the stigma of drug use during pregnancy and the accompanying legal, ethical and economic issues. Although drugs of choice and routes of administration vary by country, exposure of our most valuable resource, our children, to the developmental effects of drugs is an enormous problem. In utero drug exposure can have a severe impact not only on the development of the fetus, but also on the child during later stages of life. More than 75% of infants exposed to drugs have major medical problems as compared to 27% of unexposed infants. The cost of treating drug-affected infants was twice the cost of non-affected infants. Obstetrical complications including placental insufficiency, miscarriage, intrauterine death, and increased incidence of infectious and sexually-transmitted diseases are higher in the drug-abusing mother. Treatment for pregnant addicts should be a high priority for our governments. Increased awareness and improvement in our understanding of drug abuse in the medical, legal and social realms will enable us to reduce the barriers to treatment for this important population.Accurate identification of in utero drug exposure has important implications for the care of the mother and child, but can raise difficult legal issues. Society discourages prenatal care with the infliction of harsh criminal penalties. Maternal drug use during pregnancy can be monitored with urine, sweat, oral fluid and/or hair testing. Detection of in utero drug exposure has traditionally been accomplished through urine testing; however, the window of detection is short, reflecting drug use for only a few days before delivery. Monitoring exposure through testing of alternative matrices, such as neonatal meconium and hair, offers advantages including non-invasive collection and detection earlier in gestation. There are many unresolved issues in monitoring in utero drug exposure that urgently require research. These can be divided into research to definitively differentiate drug exposed and non-drug-exposed fetuses, determine the most efficient methods to routinely monitor women's drug use, and determine how these drug test results relate to neonatal and maternal outcomes. Research in this area is difficult and expensive to perform, but necessary to assess accurately drug effects on the fetus. By increasing our understanding of the physiological, biochemical and behavioral effects of gestational drug exposure, we may ultimately provide solutions for better drug prevention, treatment and a reduction in the number of drug-exposed children.