Three-dimensional modeling of the various volumes of canines to determine age and sex: a preliminary study

Canines are usually used in anthropological and forensic sciences for sex and age determination. The best methods to estimate age are based on secondary dentine apposition, evaluated from periapical X-rays. The aim of this study was to propose a new method of sex and age estimation using 3D models to obtain more precise predictions using tooth volumes. Fifty-eight dental CT scans of patients aged 14-74 with a well-balanced sex ratio composed the sample. One hundred and thirty-three healthy canines were modeled (Mimics 12.0). The sample was divided into a training sample and a validation sample. An age formula was determined using the "pulp volume/tooth volume" ratio. Sex prediction was adjusted with total volumes. Applying the equations to the validation sample, no significant difference was found between the real and predicted ages, and 100% of the sex predictions were correct. This preliminary study gives interesting results, and this method is worth being tested on a larger data sample.     

Scanning electron microscopy analysis of experimental bone hacking trauma of the mandible

The authors report on a macroscopic and microscopic study of human mandible bone lesions achieved by a single-blade knife and a hatchet. The aim of this work was to complete the previous data (scanning electron microscopy analysis of bone lesions made by a single-blade knife and a hatchet, on human femurs) and to compare the lesions of the femur with those of the mandible. The results indicate that the mandible is a more fragile bone, but the features observed on the mandible are quite similar to those previously observed on the femur. This work spells out the main scanning electron microscopy characteristics of sharp (bone cutting) and blunt (exerting a pressure on the bone) mechanisms on human bone. Weapon characteristics serve to explain all of these features.     

US police officers’ knowledge regarding behaviors indicative of deception: Implications for eradicating erroneous beliefs through training

Abstract

The current study surveyed a random sample of Texas law enforcement officers (n?=?109) about their knowledge regarding behaviors indicative of deception. The officers were not highly knowledgeable about this topic, overall performing at a chance level in assessing how various behavioral cues relate to deception. Confidence in one's skill was unrelated to accuracy, and officers who reported receiving the most training and utilizing these skills more often were more confident but no more accurate in their knowledge of the behaviors that typically betray deception. The authors compare these results to previous studies that have examined officers’ beliefs in other countries and discuss the implication of these results in terms of developing future training programs that may debunk the common misconceptions that officers possess.     

MERCOSUR enlargement: predicting the effects on trade in primary agricultural commodities

This article estimates the effects of a hypothetical enlargement of the Mercado Común del Sur (MERCOSUR), depicted by granting MERCOSUR associate member countries a full membership status, on trade in primary agricultural commodities. The empirical investigation is implemented through the multiplicative form of the gravity model. The estimated gravity parameters are used to carry out scenarios that predict the effects of MERCOSUR enlargement on trade in primary agricultural commodities. The predictions reveal that MERCOSUR enlargement would generate significant increases in exports from the full members to the associate members. The predictions also show relatively smaller increases in exports from the associate members to the full members (in value terms), but some important increases in trade among the associate members. Trade diversion effects of MERCOSUR enlargement, which influence trade between full members and from non-member countries to full and associate members, are found to be limited.     

Setting the Standard in Performance Measurement Systems

A fundamental challenge in the design of performance measurement and incentive systems is the establishment of appropriate benchmark levels of performance, also known as performance standards. Drawing from the information economics, contract theory and public administration literatures, we derive theoretical implications for the construction of performance standards. We then assess alternative methods that are commonly used to construct performance standards and consider their application in performance measurement systems in public programs. We draw out important lessons for the establishment of performance benchmarks and other implications for performance standards system design in public organizations.     

Discrete Traits of the Sternum and Ribs: A Useful Contribution to Identification in Forensic Anthropology and Medicine

During forensic anthropological investigation, biological profile is determined by age, sex, ancestry, and stature. However, several individuals may share the same profile. Observation of discrete traits can yield useful information and contribute to identification. This research establishes the frequency of discrete traits of the sternum and ribs in a modern population in southern France, using 500 computer tomography (CT) scans of individuals aged 15–60 years. Only discrete traits with a frequency lower than 10% according to the literature were considered, a total of eight traits. All scans examined were three‐dimensional (3D) volume renderings from DICOM images. In our population, the frequency of all the discrete traits was lower than 5%. None were associated with sex or age, with the exception of a single trait, the end of the xiphoid process. Our findings can usefully be applied for identification purposes in forensic anthropology and medicine.     

Odontological Approach to Sexual Dimorphism in Southeastern France

Abstract: The aim of this study was to establish a prediction formula to allow for the determination of sex among the southeastern French population using dental measurements. The sample consisted of 105 individuals (57 males and 48 females, aged between 18 and 25 years). Dental measurements were calculated using Euclidean distances, in three‐dimensional space, from point coordinates obtained by a Microscribe. A multiple logistic regression analysis was performed to establish the prediction formula. Among 12 selected dental distances, a stepwise logistic regression analysis highlighted the two most significant discriminate predictors of sex: one located at the mandible and the other at the maxilla. A cutpoint was proposed to prediction of true sex. The prediction formula was then tested on a validation sample (20 males and 34 females, aged between 18 and 62 years and with a history of orthodontics or restorative care) to evaluate the accuracy of the method.     

Public interest law revisited 1

This article undertakes a detailed examination of the practical desirability and legal validity of arbitration clauses under the Nigerian legal regime. This involves navigating through provisions of the relevant Rent Control and Recovery of Premises Law. Areas of incompatibility (including those bordering on jurisdiction, penal provisions and enforcement of awards) between the latter law and arbitration clauses are then discussed. Finally, recommendations are made to the effect that the Rent Control and Recovery of Premises Law should be amended.     

导入ISO9001:2000背景下地方政府绩效考核指标体系述评

地方政府在导入ISO质量管理体系的背景下,其绩效如何考核?国际标准化组织设计了一套完整的指标体系,包括"好政府的制度发展、经济的可持续发展、全面的社会发展和环境的可持续发展"等四个维度。本文对这套指标进行了介绍,并结合中国的具体情况进行了分析,目的在于为地方政府导入ISO质量管理体系进行理论上的指导。文章认为,导入这套指标体系符合我国建设和谐社会和落实科学发展观的要求,有利于促进政府职能转变,有利于解决当前我国的社会问题。因此,它在我国具有相当强的可适用性。