Reinvention As Reform: Assessing the National Performance Review

The conclusion of the Clinton Administration presents an opportune time to investigate the outcomes of the National Performance Review (NPR). Any such evaluation, however, is complicated by the nature of the objectives sought, many of which relate to subtle and elusive elements of organizational life: empowering employees, inducing a less risk-adverse culture, and enhancing the quality of service delivery. The strategy employed here as a means of gaining insight into such phenomena was to couple a broad review of government-wide survey results with an in-depth investigation into the impact of NPR on a single agency, the Social Security Administration. A conclusion is that many of the NPR's "higher-order" objectives have not been met on a systemic basis. While a variety of proximate explanations for this finding can be identified, a more fundamental explanation relates to a failure by the sponsors to adjust their strategy to account for basic differences between NPR and past reforms.     

A novel histological technique for distinguishing between epithelial cells in forensic casework

There are a number of forensic cases in which the identification of the epithelial cell type from which DNA originated would provide important probative evidence. This study aimed to develop a technique using histological staining of fixed cells to distinguish between skin, buccal and vaginal epithelium. First, 11 different stains were screened on formalin-fixed, wax-embedded cells from five women. Samples were analysed qualitatively by examining staining patterns (colour) and morphology (absence or presence of nuclei). Three of the staining methods – Dane's, Csaba's and Ayoub-Shklar – were successful in distinguishing skin epithelial cells from buccal and vaginal. Second, cells were smeared directly onto slides, fixed with one of five fixatives and stained with one of the three stains mentioned above. Methanol fixation, coupled with the Dane's staining method, specific to keratin, was the only technique that distinguished between all three cell types. Skin cells stained magenta, red and orange and lacked nuclei; buccal cells stained predominantly orange–pink with red nuclei; while vaginal cells stained bright orange with orange nuclei and a blue extracellular hue. This staining pattern in vaginal cells was consistent in samples collected from 50 women aged between 18 and 67. Identification of cell type from unlabelled micrographs by 10 trained observers showed a mean success rate of 95%. The results of this study demonstrate that histological staining may provide forensic scientists with a technique for distinguishing between skin, buccal and vaginal epithelial cells and thus would enable more conclusive analyses when investigating sexual assault cases.     

Judging Bias: Juror Confidence and Judicial Rulings on Challenges for Cause

The judge in a jury trial is charged with excusing prospective jurors who will not be impartial. To assess impartiality, prospective jurors are typically asked whether they can be fair. Using an experimental paradigm, we found that small changes in jurors' self‐reported confidence in their ability to be fair affected judges' decisions about bias but did not affect the judgments of either attorneys or jurors. We suggest why a judge's role and unique relationship with jurors is likely to foster a decision strategy based on reported juror confidence, and we discuss the implications of our analysis for current legal debates over jury selection practices. Unexpected patterns in our results also highlight the ways in which perceptions of impartiality are affected, in part, by the social characteristics of the observer.     

Regional Information: MESQUITE: BUSH OF MANY USES--A SUDAN EXPERIMENT

This title introduces a new and what is hoped may be a permanentsection of the journal. So far, we have to a large extent dependedupon summaries at second-hand; in this section, we hope to publishfirst-hand information, too short for an article and perhapstoo long for a letter, from all parts of Africa, and on allkinds of topics, with special emphasis on the progress of developmentschemes. Needless to say, the use of the section will be madeor marred by the response of members in the field     

Two examples of null alleles at the D19S433 locus due to the same 4 bp deletion in the presumptive primer binding site of the AmpFlSTR Identifiler kit

Two cases of allelic loss at the D19S433 locus after multiplex PCR with the AmpFlSTR Identifiler kit (Applied Biosystems) are described. In both cases the failure of PCR resulted in genetic inconsistencies due to opposite homozygosity. After singleplex PCR with published primers additional alleles were observed and Mendelian inheritance was restored. These PCR products were sequenced and in both cases the same 4 bp deletion near the 3′ end of the repeat region was detected in two alleles of different length. The frequency of these null alleles (two events in 1026 allelic transfers) amounts to 0.0019 (95% confidence limits: 0.0002-0.0070).     

Interrogation of short tandem repeats using fluorescent probes and melting curve analysis: A step towards rapid DNA identity screening

Current forensic DNA profiling methods rely on the analysis of samples at specialised laboratories with an average turnaround time of several days. The ability to rapidly determine a partial profile of short tandem repeats at the point-of-arrest would be of great benefit to police forces around the world, for example enabling a suspect to be rapidly included or excluded from an investigation. We have developed a homogeneous PCR method for the interrogation of STR loci utilising fluorescent oligonucleotide probes and melting curve analysis. Alleles of the D18S51, TH01 and D8S1179 loci were differentiated and identified on the basis of target length and probe melting temperature. Assay performance was evaluated by comparing melting peak data with the AmpFlSTR^® SGM Plus^® system. The method is compatible with direct analysis of unpurified buccal swab samples, enabling a partial STR profile to be generated within 1 h.