An integrated technique for the analysis of skin bite marks

The high number of murder, rape, and child abuse cases in South Africa has led to increased numbers of bite mark cases being heard in high courts. Objective analysis to match perpetrators to bite marks at crime scenes must be able to withstand vigorous cross-examination to be of value in conviction of perpetrators. An analysis technique is described in four stages, namely determination of the mark to be a human bite mark, pattern association analysis, metric analysis and comparison with the population data, and illustrated by a real case study. New and accepted techniques are combined to determine the likelihood ratio of guilt expressed as one of a range of conclusions described in the paper. Each stage of the analysis adds to the confirmation (or rejection) of concordance between the dental features present on the victim and the dentition of the suspect. The results illustrate identification to a high degree of certainty.     

Dental age estimation of Norwegian adults — A comparison of different methods

Age estimations were performed on 100 teeth according to the methods of Bang and Ramm (unsectioned and sectioned teeth), Miles, Johanson, and Dalitz, and in addition by visual examination of the unsectioned teeth. Mean error as well as standard and mean deviations were calculated. The method of Johanson was found to be slightly more reliable than the others. Visual estimation was also in some respects better than the other three methods. All methods resulted in the largest number of overestimates in teeth from persons below 40 years, from males, from the maxilla, and in teeth removed from corpses. Underestimates were predominant in teeth from persons above 50 years.     

A technique to capture, analyze, and quantify anterior teeth rotations for application in court cases involving tooth marks

Anterior teeth within the human dentition have a specific numerical rotation value. Bite marks show an array of angled indentations, abrasions, microlacerations, and contusions. These marks generally represent the incisal surfaces of the suspect's dentition reflecting the rotation values of the teeth in the dental arch. This study described a method for capturing and analyzing anterior dental rotations. The rotations of individual anterior teeth within the study population were categorized as common, uncommon, and very uncommon according to Allen's classification. In the absence of a large number of incisal patterns present in a bite mark, a single but heavily weighted tooth rotation could be of equal discriminatory potential to several common rotation values. No prevalence studies quantifying individual tooth rotations are available. The measurement of each individual tooth rotation together with its individual discrimination potential will enhance the evaluation of the concordant features observed in bite marks.     

Learning by doing in contests

We introduce learning by doing in a dynamic contest. Contestants compete in an early round and can use the experience gained to reduce effort cost in a subsequent contest. A contest designer can decide how much of the prize mass to distribute in the early contest and how much to leave for the later one in order to maximize total efforts. We show how this division affects effort at each stage, and present conditions that characterize the optimal split. There is a trade off here, since a large early prize increases first period efforts leading to a substantial reduction in second round effort cost; on the other hand, there is less of the prize mass to fight over in the second round, reducing effort at that stage. The results are indicative of the fact that the designer often prefers to leave most of the prize mass for the second contest to reap the gains from the learning by doing effect.     

Non-destructive dental-age calculation methods in adults: intra- and inter-observer effects

The aim of the present study was to obtain data on the reliability and reproducibility of two non-destructive dental-age estimation methods in adults by calculating inter- and intra-observer effects. Both a morphological and a radiological technique available in the scientific literature were evaluated on a number of recently extracted teeth: the morphological technique was evaluated on a total of 160 teeth by two examiners, while three examiners applied the radiological technique on apical radiographs of 72 extracted teeth. Paired t-tests were used to calculate intra- and inter-observer differences. For the morphological method, both examiners were able to produce dental-age estimations that did not differ significantly from the real age of the teeth, obtaining a mean error between 0.5 and 1.8 years and a standard deviation of this error between 9.0 and 11.3 years. When using the radiological technique according to the original protocol, all three examiners produced age estimations that were statistically comparable to the real age of the teeth with a mean error of 0.5-2.5 years and a standard deviation of 4.6-9.8 years. For both techniques, intra-observer differences were observed. Based on the results of this study, it can be concluded that both non-destructive dental-age estimation techniques were able to produce reasonably accurate dental-age estimations, at least when these techniques were applied appropriately. However, the forensic odontologist is recommended to use different age estimation techniques and perform repetitive measurements in order to verify the reproducibility of the calculations performed.     

Assessing suicide risk in cluster C personality disorders

The aim of the study was to assess suicide risk in psychiatric outpatients with specific cluster C personality disorders (avoidant, dependent, and obsessive-compulsive). A sample of 142 psychiatric outpatients was used for the study. The sample was composed of 87 outpatients meeting diagnostic criteria for a personality disorder and 53 psychiatric outpatients meeting criteria for an axis I disorder only. The results showed that dependent, but not avoidant or obsessive-compulsive, personality disorders, as well as the clusters A and B personality disorders, were significantly associated with suicide attempts. This association remained significant after controlling for both a lifetime depressive disorder and severity of depression for the cluster A and the cluster B personality disorders, but not for dependent personality disorder. The results underline the importance of assessing suicide risk in patients with cluster A and cluster B personality disorders, while the assessment of suicide risk in patients with cluster C personality disorders seems to be irrelevant as long as assessment of a comorbid depressive disorder is appropriately conducted.     

Local Elections and Local Government Performance

Over the past couple of decades, the level of turnout in Norwegian local elections has shown a steady d. This decline is paralleled by a greater range of variation in turnout across Norwegian municipalities. Arguing from the perspective of rational utility-maximizing voters, the article examines to what extent such variations in the level of turnout may be accounted for by the policy performance of local authorities – in addition to certain structural features of the municipalities and local communities. Using aggregate data on turnout and measures of policy performance. the analysis testifies to the suggestion that policy exerts an influence in determining the level of turnout, indicating a turn in the direction of more rational voting behaviour as far as local elections arc concerned. It is also evident from the analysis that the appearance of smaller single-issue parties does have a mobilizing effect in local elections while the Downsian suggestion about the effect of party competition on turnout levels is not supported by the mule of the analysis.     

Dreams and disillusionment: engagement in and disengagement from militant extremist groups

People engage in terrorism and similar forms of violent extremism for a variety of reasons, political or non-political. The frequent failure to achieve what they expected or dreamed about is also usually the source of their disillusionment, and subsequently, a main reason to disengage from violent extremism. Individuals involved in terrorism often come from a diversity of social backgrounds und have undergone rather different processes of violent radicalisation. Profiles of terrorists do not work as a tool to identify actual or potential terrorists because such profiles fail to capture the diversity and how people change when they become involved in militant extremism. This study suggests a more dynamic typology of participants in militant groups, based on dimensions which represent dynamic continuums rather than static positions. During their extremist careers individuals may move from resembling one type initially into acquiring more of the characteristics of other types at later stages. When it comes to prevention and intervention measures, one size does not fit them all. The typology may be used as an aid to develop more specific and targeted strategies for preventing violent radicalisation and facilitating disengagement, taking into account the diversity and specific drivers behind different types of activists.     

Extreme nationalism and violent discourses in Scandinavia: ‘the resistance’, ‘traitors’, and ‘foreign invaders’

This is a comparative analysis of neo‐Nazis and anti‐immigration activists in Norway, Denmark and Sweden with regard to their rhetoric and justifications for violence against ‘foreigners’ and political opponents, and actual patterns of violence and harassment. Different traditions of nationalism in the three Scandinavian countries, and highly dissimilar historical experiences ‐ especially during World War II ‐influence the rhetorical strategies of the two types of extreme nationalists, and their respective abilities to appropriate national symbols. However, based on divergent historical analogies, most extreme nationalist groups present themselves as a ‘resistance movement’ fighting ‘foreign invaders’ and ‘traitors’.