Errors in the estimation of the distance of fall and angles of impact blood drops.

This paper presents derived equations for the estimation of the variances in the estimated distance of fall and the estimated angle of impact for blood droplets. The derived equation for the variance of the estimated distance of fall predicts that as the blood drop size approaches that of a blood droplet falling at terminal velocity, the variance of the estimate grows without limit. The derived equation for the variance in the estimated angle of impact shows that as the angle of impact approaches 90 degrees, the variance grows without limit. The validity of the equation for the estimated variance of the angle of impact was tested for five angles of impact (15, 30, 45, 60 and 75 degrees); the equation correctly predicted the observed variance up to an angle of 60 degrees.     

Disputes and conflicts inside organizations: A systems approach

Book reviewed in this article: Robert R. Blake and Jane Srygley Mouton , Solving Costly Organizational Conflicts David Ewing , Justice on the Job William L. Ury, Jeanne M. Brett , and Stephen B. Goldberg , Getting Disputes Resolved: Designing Systems to Cut the Costs of Conflict Alan F. Westin and Alfred G. Feliu , Resolving Employment Disputes Without Litigation James T. Ziegenfuss , Organizational Troubleshooters: Resolving Problems with Customers and Employees     

Differentiation of fetal and adult bloodstains by pyrolysis-gas-liquid chromatography

A pyrolysis-gas-liquid chromatographic method has been developed for the differentiation of adult and fetal bloodstains. In a blind-coded study, five adult and three fetal bloodstains were correctly identified on the basis of the pyrograms of stain extracts. The differentiation between adult and fetal bloodstains is based on the peak height ratio of two long-retention-time peaks appearing in their pyrograms. The first of these peaks has been tentatively identified as indole derived from the pyrolysis of tryptophan, while the second peak is an as-yet unidentified molecular fragment produced by the pyrolysis of some component of the hemoglobin molecule other than the amino acids tryptophan, tyrosine, and phenylalanine.     

Errors in the determination of the point of origin of bloodstains

Bloodstain pattern analysts are sometimes called upon to determine the point of origin of a pattern of bloodstains. A derivation of expressions for the uncertainties deltaX and deltaY in the coordinates of the point of origin P(X, Y) of two bloodstains on a surface has recently been published. These uncertainties were expressed in terms of the uncertainties in the measured distance between the bloodstains and the uncertainties in the angles of impact of the bloodstains. This paper extends the derivations in the previous work by expressing the uncertainties in the coordinates of the point of origin of two bloodstains in terms of the uncertainties in the length and width measurements from which the angles of impact of the bloodstains are calculated.     

Falling into Line? The Hostile Environment and the Legend of the ‘Judges’ Revolt’

In 2012 the Government made a number of controversial changes to the Immigration Rules, which it claimed would ‘comprehensively reform the approach taken towards ECHR Article 8 in immigration cases’. This paper examines the judicial response, arguing that the courts ‘fell into line’, adapting human rights law to the government's aims through unprincipled and opportunistic techniques, whilst inflicting hardship and injustice on working-class British citizens in particular. Four key moves are identified. First, the courts created an ‘incapable’ test which immunised the rules from in principle challenges. Second, Lord Bingham's Article 8 test, in which the reasonableness of any family member relocation was a central consideration, was replaced with a far less family-friendly test. Third, the courts adopted an ultra-lax rationality test at common law, even when the ‘fundamental rights’ of British citizens were engaged. Finally, the courts identified immigration policy as the ‘constitutional responsibility’ of the executive.     

Are the major risk/need factors predictive of both female and male reoffending?: a test with the eight domains of the level of service/case management inventory

The Level of Service/Case Management Inventory (LS/CMI) and the Youth version (YLS/CMI) generate an assessment of risk/need across eight domains that are considered to be relevant for girls and boys and for women and men. Aggregated across five data sets, the predictive validity of each of the eight domains was gender-neutral. The composite total score (LS/CMI total risk/need) was strongly associated with the recidivism of males (mean r = .39, mean AUC = .746) and very strongly associated with the recidivism of females (mean r = .53, mean AUC = .827). The enhanced validity of LS total risk/need with females was traced to the exceptional validity of Substance Abuse with females. The intra-data set conclusions survived the introduction of two very large samples composed of female offenders exclusively. Finally, the mean incremental contributions of gender and the gender-by-risk level interactions in the prediction of criminal recidivism were minimal compared to the relatively strong validity of the LS/CMI risk level. Although the variance explained by gender was minimal and although high-risk cases were high-risk cases regardless of gender, the recidivism rates of lower risk females were lower than the recidivism rates of lower risk males, suggesting possible implications for test interpretation and policy.