Fatal craniocerebral trauma in a young child. I: Forensic documentation,model generation and geometric impact conditions

The aim of forensic biomechanics is the reconstruction of traumatic events based on the pathological findings in the victim's morphology and on the traces and shapes of the traumatizing tools. The introduction of Streifenlichttopometrie into forensic science enables 3-dimensional and proportionally accurate documentation of the victim's body and injuring agent with submillimeter precision. The advantages of this method of documentation are the possibilities of producing animated models which correspond exactly to the body's shape and injury topography, and of ascertaining the physical parameters (centers of mass, moments of inertia) of the various body parts and the geometrical impact conditions for the reconstruction of the injury dynamics. This way of proceeding thus enables more precise models than hitherto possible for kinetic and dynamic reconstruction. In the case of an infant who was fatally injured by a wooden sculpture the generation and application of computer aided 3-dimensional reconstruction models are shown.     

Characterization and validation studies of powerPlex 2.1, a nine-locus short tandem repeat (STR) multiplex system and penta D monoplex

In order to increase the power of discrimination for human identification purposes, a nine-locus short tandem repeat (STR) multiplex, the GenePrint PowerPlex 2.1 system (PowerPlex 2.1) developed by Promega Corporation and a separate pentanucleotide-repeat locus, Penta D, were tested. This megaplex system includes the highly polymorphic loci FGA, TPOX, D8S1179, vWA, Penta E, D18S51, D21S11, TH01, and D3S1358 and may be used in combination with the eight-locus STR multiplex, the GenePrint PowerPlex 1.1 system (PowerPlex 1.1) that has been previously developed. Three of the loci, TPOX, TH01 and vWA, have been included in both systems for quality control purposes. As with PowerPlex 1.1, PowerPlex 2.1 is also based on a two-color detection of fluorescent-labeled DNA products amplified by polymerase chain reaction (PCR) and provides a valuable tool for accurate and rapid allele determination. The primer sequences used in the PowerPlex 2.1/Penta D system are also presented in this report. To meet the "Quality Assurance Standards for Forensic DNA Testing Laboratories" (FBI), we tested the efficiency and reproducibility of the PowerPlex 2.1/PentaD system by several validation studies that were conducted as a joint project among seven laboratories. Validation tests included concordance studies, sensitivity, and species specificity determination, as well as performance in forensic and environmentally impacted samples. The results produced from these tests demonstrated the consistency and reliability of the PowerPlex 2.1/Penta D system.     

Analysis of the incidence of pelvic trauma in fatal automobile accidents

Pelvic fractures are frequent complications of motor vehicle accidents, and motor vehicle accidents are the most common cause of pelvic fracture. Although pelvic fractures are associated with considerable morbidity and mortality, there has traditionally been no attempt to grade or classify pelvic fractures during postmortem examination. The authors performed a retrospective study of cases examined at the Jefferson County Coroner/Medical Examiner Office from 1994 to 1996, reviewing investigative reports and autopsy findings. Radiographs were examined for the presence and Tile type of pelvic fracture. Pelvic fractures were identified in 88 of 392 cases (23%). In most (89%), the pelvic fracture was readily classified according to Tile type on the basis of radiographs and the inferred mechanism of injury. This study indicates that current estimates of the mortality of pelvic fractures are low because of the exclusion of individuals who do not survive to hospitalization. Furthermore, pelvic fractures in rapidly fatal motor vehicle accidents tend to be more severe than fractures in individuals who have a significant interval of survival. The presence and classification of pelvic fractures may be readily determined by radiographs in most cases. The Tile classification scheme is easy to apply and has important implications in the comparison of study groups.     

Cyanide fatalities: case studies of four suicides and one homicide

Deaths due to cyanide poisoning are relatively rare, largely owing to the restricted availability of cyanide. Nevertheless, the authors report five cases of cyanide fatalities occurring within a few months. Cyanide is one of the most rapidly acting poisons known and is still used for suicide and homicide. The discussion focuses on the circumstances, metabolic changes, pathophysiology, blood levels, diagnosis, and management of cyanide poisoning.     

The Structure and Dynamics of Group Politics: 1964–1992

In the realm of politics the relevance of groups derives from their centrality to government institutions, the policy process, and election campaigns. In addition, individuals have a predisposition to rely on cues and shortcuts when making choices and forming preferences; groups are ideal for this purpose. Groups help orient individuals to their social world by providing standards, supplying information, and defining friend and foe. If groups are central to politics and political cognition then we should find an underlying political structure within which group attitudes can be organized, and through which other political attitudes, coalitions, and behaviors can be viewed. In our analysis we apply Rabinowitz (1976) Line of Sight method for ordering object pairs consistent with the Euclidean spatial model to the complete series of group thermometer ratings from the NES Presidential Election Studies, 1964 through 1992. The resulting eight group by group matrices are subjected to a series of multidimensional scaling models to determine the underlying structure of the group spatial distances. Our findings suggest that orientations toward groups can be satisfactorily mapped into a two-dimensional space defined by partisan and affective axes. Over this 30-year period we find that attitudes toward groups have become more emotional and less partisan in nature. Interpretation of the group space is further aided by the use of ideal-point regressions that make it possible to place voters, members of the New Deal coalition, and issue publics in the space defined by group attitudes.     

When Can a News Organization Lead Public Opinion? – Ideology Versus Market Forces in Decisions to Make News

Public Choice - Do news organizations purposefullylead the public to support a particularideological agenda? When debating thisquestion, many analysts draw conclusionsfrom weak empirical evidence....     

The Federal Accounting Standards Advisory Board: A View of Its Role One Year Later

The secretary of the Treasury, the Director of the Office of Management and Budget (OMB) and the comptroller general established the Federal Accounting Standards Advisory Board (FASAB) at the end of 1990. The Board recommends accounting principles for the United States government, including those to implement the Chief Financial Officers Act. This article reviews some results of research conducted by the Board during the past year and presents a conceptual framework for understanding the role of the Board and how it differs from the roles of FASB and GASB.     

The Performance-Verbal IQ discrepancy in differentiated subgroups of delinquent adolescent boys

Evidence for Wechsler's Performance-Verbal IQ sign of adolescent psychopathy in the test results of undifferentiated groups of delinquents has been variable. In view of the heterogeneity of delinquency as a clinical syndrome, the validity of Wechsler's sign was reexamined for psychopathic, neurotic, and subcultural delinquent boys defined according to Quay 's behavioral classification system. Only the psychopathic group scored significantly higher on the Performance Scale than on the Verbal Scale. However, the number of adolescents in each group obtaining higher Performance than Verbal IQs did not significantly differ. Additional group comparisons indicated that the psychopaths earned markedly lower scores on the Comprehension subtest that did the other groups. The findings were interpreted in light of characteristics common to most delinquents regardless of personality orientation.Received his Ph.D. in clinical psychology from the University of Texas at Austin. Major interests are clinical child and developmental psychology.