A framework for estimating probability of a match in forensic bite mark identification

In forensic dentistry, a human expert typically does the comparison and identification based on bite marks. Unlike DNA analysis, however, there is no quantitative basis with which to assign a probability for this given match. This paper proposes a framework for empirically estimating the probability of such a bite mark match and reports on initial experimental results. The methodology involved collection of dental population data (3D dental casts and bite mark images), image analysis for quantitatively measuring the degree of match (based on chamfer distance), and performing a logistic regression analysis using the collected population data to estimate the probability of match from the calculated degree of match. The model correctly predicted 35 of the 42 matches and 585 of the 588 mismatches. The method also has potential for use in other forensic applications in which the assignment of quantitative probabilities is important.     

The Foreign Policy Beliefs of Political Campaign Contributors

Since the Vietnam War, scholarly interest in public and elite opinion of U.S. foreign policy has grown. Because elites generally have greater access to policy makers and more consistent political views, most work on this topic has focused on elite opinions of foreign policy. Most research has defined the term elite broadly, often placing more emphasis on social status than political power. We will reexamine elite foreign policy beliefs using a different elite, presidential campaign contributors. We have two main goals in this article. First, we will assess the differences between the foreign policy outlooks of political campaign contributors and other elites. While many types of elites may influence policy, political contributors are particularly likely to gain access to policy makers. The second part of this research note offers some food for thought on the origins of these beliefs. We present evidence that foreign policy beliefs are related to the same ideological orientations that shape contributors' views on domestic issues. The origins of foreign and domestic policy views should probably be considered together.     

County impact fee adoptions as policy innovations: a search for theory

This study documents the importance of employing an integrated model to explain innovative policy making among county governments in Florida. Specifically, it suggests that both internal determinants and regional diffusion factors influence the adoption of county impact fees. While rapid growth and impending county commission elections appear to be factors motivating adoption, the tendency to adopt can be offset by a substantial low-income population. Nevertheless, obstacles to adoption can be overcome where cities within the county have previously adopted an impact fee.     

Opposition research: some theories and practice

Abstract. An institution unique to parliamentary systems of government oper-ates within the Canadian House of Commons: a set of research offices serving each of the major opposition party caucuses but financed by public funds under the government's control, The writer, who was the organizing director of the largest of these 'counter-bureaucracies, examines the origins of the institution, delineates the competing role definitions considered for adoption, recounts operating difficulties, and tries to analyse some of the traceable conse- quences for the conduct of parliamentary business and party affairs. While the Research Office makes a discernible impact in a number of secondary dimen- sions, the characteristics of the members of the opposition and of their leader are found to be the major determinants of their parliamentary performance. Sommaire. Une institution qui est unique parmi les systèmes parlementaires de gouvernement fonctionne au sein de la chambre des communes. Il s'agit de bureaux de recherche au service des principaux partis en opposition, mais financés par les fonds publics sous le contrôle du gouvernement. L'auteur qui était directeur-organisateur de la plus grande de ces « bureaucraties parallèes » examine les origines de cette institution, expose les définitions du rôle compétitif considérées pour adoption, explique les difficdtés pratiques et essaie d'analyser quelques-unes des conséquences certaines sur la conduite des affaires parlementaires et de celles des partis. Bien que le bureau de recherche ait une influence indéniable sur un certain nombre de décisions secondaires, c'est le caractère particulier des membres de l'opposition et de leurs chefs qui est I'élément détenninant de leur comportement parlementaire.     

Orthodontic Treatment: Real Risk for Dental Age Estimation in Adults?

Dental age estimation becomes a challenge once the root formation is concluded. In living adults, one dental age indicator is the formation of secondary dentine, also associated with orthodontic treatment as well as root shortening. The aim of this study was to establish whether these secondary effects of orthodontic treatment could generate a statistically significant difference in dental age estimations when using Kvaal's method. The study sample included 34 pairs of pre‐ and postorthodontic panoramic radiographs, from different individuals with exactly the same age and sex distribution. Females 65%, median age 17.5 years, and males 35%, median age 22.5 years, were included. After data collection, dental age was estimated per tooth using formulae previously published. The risk of obtaining over‐estimation of age was calculated. (RR = 1.007). The changes caused by orthodontic treatment do not have any significant effect on age estimation when Kvaal et al.'s method is applied on panoramic radiographs.