Methods for the analysis of hard dental tissues exposed to high temperatures

The preservation of teeth that have been exposed to a heat source is a key factor in order to keep their value as evidence. This research paper presents some methods under development for the analysis of dental evidence after exposure to high temperatures; it also establishes age related alterations of young and aged teeth which have been exposed to direct heat. A total of thirty permanent healthy teeth (young=15 and old=15) were submitted to direct heat (n=14) and to a controlled raise of temperature (n=16); they were embedded in polymethylmetacrilate. For the macroscopic study, blocks were cut in half, polished and their surfaces were digitalized. Subsequently, blocks were put in slides, worn away and observed through a photomicroscope. The study of the colorimetric pattern was done by Corel Photo Paint 12.0 and Image J. software. All teeth submitted to the gradual raise of temperature presented a degree of structural damage lower than those exposed to direct heat. The internal surface of young teeth exposed to direct heat showed lines of fracture oblique to the long axis of the tooth; in contrast, a reticular pattern was observed on aged teeth. All teeth exposed to direct heat showed some matte-black coloration areas, while those submitted to a gradual increment of temperature showed a greyish colour in the enamel and a chalky-white in the cementum. By using both thermal treatments in young teeth, the amelodentinal junction was lost, thus preserving the integrity of each tissue. In aged teeth, the separation of this junction was produced because of the breakdown of the dentine. Microscopically, in teeth exposed to direct heat, it was neither possible to differentiate the dentin from the cementum, nor to distinguish the incremental lines of the latter; while in those submitted to a controlled increment of temperature, the corresponding morphology in the tissues was observed. A significant statistical difference was obtained for black colour among young and aged teeth exposed to direct heat, as well as among the means of all colours obtained from the teeth exposed to both treatments. The structural changes observed allow locating a tooth in the studied age groups. Our results show the viability of the applied method for the processing of samples, allowing their preservation as evidence during an indefinite time.     

A follow-up investigation on the quality of medical documents from examinations of Basque incommunicado detainees: the role of the medical doctors and national and international authorities in the prevention of ill-treatment and torture

According to the United Nations and the European Committee for the Prevention of Torture (CPT), torture and ill-treatment continues to be a problem during incommunicado detentions in Spain. CPT has visited Spain and published recommendations for improvements of preventive medical examinations. However, no scientific assessment of the impact of such recommendations exists. The objectives of this study were to assess the quality of documents from preventive medical examinations and the prevalence of alleged ill-treatment and compare findings with similar data from a previous study. Documents issued by state employed doctors describing medical examination of Basques held incommunicado during 2000-2005 were reviewed. The analysis covered allegations of ill-treatment and existence and quality of information essential for medical appraisal of allegations of ill-treatment. The material was collected by a non-governmental organisation. Of 425 documents concerning 118 persons, 85% had no formal structure and the format recommended by CPT was never used. None of 127 documents, concerning 70 persons with allegations of ill-treatment had an overall conclusion on the likelihood of ill-treatment. Twelve to 68% of necessary data were totally missing, and only 13-38% of existing information was sufficient. There was significant variation between the reporting of individual doctors, but in general the quality was unacceptable, although somewhat higher than in the previous study. The prevalence of allegations of ill-treatment was as high as previously. There were more reports of psychological ill-treatment and procedures of forced physical exhaustion, but fewer reports of beatings. In conclusion, there was no indication that the conditions of incommunicado detainees have improved substantially over the past 15 years and the standard of medical reporting was unacceptable. The Spanish authorities should give clear objectives and guidelines for medical examinations of detainees. An independent forensic specialist with the overall academic responsibility for preventive medical examinations of detainees should be employed to supervise state employed doctors. The present article shows the necessity for harmonization of medical practice in documentation of torture.     

Sacral fusion as an aid in age estimation

The degree of fusion at the anterior aspect of the sacral vertebrae has been scored in 242 male and female skeletons from the Lisbon documented collection, ranging from 16 to 59 years old in age. Statistical tests indicate a sex difference towards earlier fusion in young females compared with young males, as well as a clear association between degree of fusion and age. Similar results have been found by other authors in documented skeletal samples from Coimbra and Sassari, and the recommendations stated by these authors regarding age estimation have been positively tested in the Lisbon collection. Although more research from geographically diverse samples is required, a general picture of the pattern of sacral fusion and its associations with age and sex is emerging. We also provide a practical example of the usefulness of the sacrum for age estimation in a forensic setting, a mass grave from the Spanish Civil War. It is concluded that the scoring of the degree of fusion of the sacral vertebrae, specially of S(1-2), can be a simple tool for assigning skeletons to broad age groups, and it should be implemented as another resource for age estimation in the study of human skeletal remains.     

Service Innovation in Developing Economies: Evidence from Latin America and the Caribbean

This paper proposes a framework for understanding key aspects of service innovation in developing economies, based on four dimensions: first, the integration of services in national innovation systems; second, competences and preferences; third, networking and cooperation; and, fourth, outcomes in terms of socio-economic impacts. This conceptual framework is matched with new evidence from case studies performed in six different Latin America and the Caribbean countries (Argentina, Chile, Brazil, Uruguay, Costa Rica and Jamaica) and nine sectors (tourism, software-ICT, outsourcing, mining, logistics, retail, creative services, sport services and biotech services). The results reveal the importance of specificities in service innovation and suggest policy and managerial implications.     

Improving large-scale implementations by applying research and data analysis: A case study on First 5 LA's implementation of PCIT in Los Angeles County

This paper presents the case of First 5 LA's 5-year countywide implementation of the Parent–Child Interaction Therapy (PCIT) program. Enthusiasts of PCIT point to it as a high-quality parenting program with the potential to positively influence child behavior, reduce recidivism into the child welfare system, and increase caregiver's confidence and self-esteem. In September 2012, First 5 LA, an independent County agency in Los Angeles that advocates on behalf of parents with young children, began a $20 million countywide implementation of PCIT. The collaborative effort between First 5 LA, the Los Angeles County Department of Mental Health, the Los Angeles County Department of Children and Family Services, and the University of California, Davis demonstrates the role that research and data analysis can play in improving large-scale implementations. The authors of this paper were contracted to conduct an evaluation of the implementation of the countywide PCIT program, and preliminary outcomes were analyzed after the first round of data collection in early 2015. This paper will discuss this case and provide examples of how research and data analysis were used effectively to make key improvements to the design and implementation of the program. The paper will then discuss bureaucratic challenges and constraints with the collaborative use of research and data. The paper will conclude with some recommendations on how research and data can effectively be used to influence policy implementation in large-scale implementations involving collaboration among multiple organizations.     

Trends and Constraints of Partial Democracy in Latin America

This article analyses the mixed forms and results of the institutionalisation of partial democracy in conjunction with free market policies in the last two decades in Latin America. It assesses trends and constrains in domains with important implications for the quality of democracy in the region, by asking the following questions: Is there an unequivocally new political and administrative culture or are older cultures proving to be resilient? Are the new means of delivering what have hitherto been regarded as public goods facilitating democracy, or hindering it? And are new constitutional arrangements and their legal corollaries and consequences facilitating participation and the formation of democratic public spheres? Posing these questions and looking for answers in the actual processes of democratisation and the introduction of free-market policies, moves analysis from the realm of models of democracy to the realm of democratic practice and highlights the ensuing tensions with the models of democracy adopted and shared with the core countries of the developed West. This research was supported by a generous grant from the US-Israel Binational Science Foundation (1999-2002), which is gratefully acknowledged. The authors would like to thank the participants of the workshop on 'Limits of politics, market crises and social disintegration' (Centre for Latin American Studies, Cambridge University, 29-30 November 2002), as well as the editorial board of Cambridge Review of International Affairs and the anonymous readers, for their criticisms and constructive remarks.     

Criminal justice and the law in Mexico

Law enforcement in Mexico has not effectively prosecuted participants in organized crime and drug trafficking. Enforcing current laws to prosecutecriminals is difficult because members of the cartels have infiltrated andcorrupted the law enforcement organizations that are supposed to prosecutethem, such as the Office of the Attorney General. Changes in Mexican criminallaw in 1996, like harsher sentences for those who participate in organized crime, offer a legal foundation for improvement; additional changes shouldbe considered.     

Varieties of Radicalism: Examining the Diversity of Radical Left Parties and Voters in Western Europe

Radical left parties (RLPs) are diverse and several RLP subtypes have been distinguished in the literature. However, the degree to which these subtypes are linked to significantly different policy proposals has not been analysed, and little is known about whether subtypes are associated with differences in their respective voters’ characteristics. This article analyses the policy positions of RLPs across a number of issues, using manifesto and expert survey data, allowing insights into the differentiation between types of RLPs. RLPs differ in the extent to which they adopt New Politics issues, and the article proposes a classification of Traditional and New Left RLPs. Using cross-national survey data from the European Election Studies series and multilevel multinomial models, the article examines the ideological, policy and social differences in the electorates of the various types of RLPs. It finds socio-demographic and attitudinal differences between the voters of Traditional and New Left RLPs that are consistent with the programmatic differences of the parties.     

Dworkin on external skepticism and moral permissions

This article discusses Ronald Dworkin’s first objection against what he calls external moral skepticism, the view that denies truth-value to moral judgments. According to that objection, an external skeptic denies that substantive moral judgments can be true. But, at the same time, the objection goes, what follows from the skeptical view is that all actions are morally permissible, which is in itself a substantive moral judgment. We call this ‘the self-defeating argument.’ We argue that the objection’s success depends on how we interpret the idea of moral permission, an issue Dworkin does not clearly resolve. Against his objection, we advance two different arguments. First, once we learn what role the idea of moral permission plays in morality, we can see that any plausible view of some agent’s moral permission must acknowledge its complex character, and that the existence of a moral permission must have some impact on the balance of moral reasons for other agents. On this understanding, it is false that it follows solely from external skepticism that everything is permissible. Second, we argue that even if permissions have a simple character, not a complex one, they are plausible only when framed within a moral constellation of rights and obligations. So understood, it is, again, false that it follows from external skepticism that everything is permissible.     

Deep learning for sex determination: Analyzing over 200,000 panoramic radiographs

The objective of this study is to assess the performance of an innovative AI-powered tool for sex determination using panoramic radiographs (PR) and to explore factors affecting the performance of the convolutional neural network (CNN). The study involved 207,946 panoramic dental X-rays and their corresponding reports from 15 clinical centers in São Paulo, Brazil. The PRs were acquired with four different devices, and 58% of the patients were female. Data preprocessing included anonymizing the exams, extracting pertinent information from the reports, such as sex, age, type of dentition, and number of missing teeth, and organizing the data into a PostgreSQL database. Two neural network architectures, a standard CNN and a ResNet, were utilized for sex classification, with both undergoing hyperparameter tuning and cross-validation to ensure optimal performance. The CNN model achieved 95.02% accuracy in sex estimation, with image resolution being a significant influencing factor. The ResNet model attained over 86% accuracy in subjects older than 6 years and over 96% in those over 16 years. The algorithm performed better on female images, and the area under the curve (AUC) exceeded 96% for most age groups, except the youngest. Accuracy values were also assessed for different dentition types (deciduous, mixed, and permanent) and missing teeth. This study demonstrates the effectiveness of an AI-driven tool for sex determination using PR and emphasizes the role of image resolution, age, and sex in determining the algorithm's performance.