Age estimation from teeth in children and adolescents

The aim of this cross-sectional study was to evaluate the dental formulas according to age because of possible changes during the last decades. From these dental formulas, the median age of emergence for the permanent teeth was deduced. The study population corresponded to the 1 to 15 year-old children who had consulted either a pediatric dentist or orthodontist in the city of Nice (France). Data were collected from the 5,848 patients' charts that included an orthopantomography. This permitted the observation of emerged teeth and agenesis. Bar charts were used to indicate the dental formula according to age. There was no significant difference in the emergence pattern of both controlateral maxillary and mandibular teeth. Only the anterior tooth emergence significantly differed according to the maxillary. The lower central incisor was the lone tooth with a median age earlier than others; the remaining teeth had an age equivalent to those of previously estimates.     

The workplace as a context for the socialization of youth

A number of respected social critics, including the President's Science Advisory Committee (PSAC), have recommended the earlier integration of adolescents into the workplace. The PSAC Panel on Youth (1973) claims that work settings provide opportunities for developing and exercising personal responsibility, taking responsibility for the welfare of others, and establishing more extensive instrumental and social relations with nonfamilial adults. This study of naturally occurring employment among high school students examines these claims about the nature of the workplace. Drawing on interview, questionnaire, and observational data, we argue that the PSAC's expectations are somewhat optimistic. With respect to personal responsibility taking, although many adolescent workers have opportunities for self-management and report performing assigned tasks dependably, very few report going beyond the call of duty. With respect to social responsibility, workers experience only modest levels of task interdependence and centrality to a team effort; yet substantial numbers of adolescent workers feel that their work serves a socially useful purpose. Finally, with respect to intergenerational contact, the workplace fails to induce meaningful interaction with adults. Taken together, the results of this study suggest that if the workplace is to become a truly vital context for adolescent socialization, it needs to be designed more deliberately with such aims in mind.This study is part of a large-scale investigation of the cost and benefits of working to adolescent development. The research program is supported by the National Institute of Education and the Spencer Foundation; dissemination of policy-oriented papers is supported by the Ford Foundation. The authors, who are Co-Principal Investigators of the research program, share equal responsibility for this report.Received Ph.D. in clinical psychology from Harvard University. Main research interests are adolescence and social institutions, life-span development, and social policy.Received Ph.D. in human development and family studies from Cornell University. Main research interests are adolescent development, life-span development, and social policy.     

READING BETWEEN THE LINES

正Alibaba’s artificial intelligence technology beats humans at reading comprehension in a world first Chinese technology and e-commerce giant Alibaba has developed artificial intelligence(AI)software capable of outperforming humans on a rigorous global     

A World ofDifference

正One of the great foreign misconceptions about China is its homogeneity.The idea that China’s vast lands are populated by nearly 1.4 billion members of an identical culture,that there is somehow an archetypal Chinese landscape,a Chinese person,or that spoken Chinese is a singular language,rather than a family of languages at least comparable to that of the entire European continent,are all at times prevalent concepts in the West.Despite     

Public preferences for rehabilitation versus incarceration of juvenile offenders

While juvenile justice policy in the United States has become more punitive in recent years, it remains unclear whether the public actually favors this response in lieu of more rehabilitation-oriented services. Public opinion polling generally shows that the public favors less punitive responses than policymakers often suppose, but significant questions remain about the accuracy of these perceptions generally, and in how they have been assessed in particular. Data from four states (Illinois, Louisiana, Pennsylvania, and Washington) aimed at assessing public preferences for rehabilitation and incarceration as a response to serious juvenile crime indicated that, for the most part, the public was willing to pay more in taxes for rehabilitation than incarceration.     

The ‘puzzle’ of autocratic resilience/regime collapse: the case of Cuba

Why do some authoritarian regimes abruptly collapse, whereas others display remarkable resilience and durability? This article addresses one particularly striking example. Why did the Batista regime in Cuba unexpectedly and suddenly disintegrate in 1958 under challenge from the small guerrilla force that Fidel Castro had established in the Sierra Maestra, whereas – over half a century later – the Castro regime has not only survived as the most long-lasting system of personalist rule in existence but has actually displayed a plausible capacity to perpetuate itself after the inevitably approaching death of its founders?     

From “frozen conflict” to enduring rivalry: reassessing the Nagorny Karabakh conflict

This article draws on international relations theory to attempt a reframing of the Armenian–Azerbaijani conflict in Nagorny Karabakh as an enduring rivalry (ER): a particular kind of interstate conflict known for its longevity and stability. The article begins by identifying a number of conceptual deficits circulating around this conflict, notably the notion that it is a “frozen conflict,” before introducing the ER framework and its analytical dividends for this case. Different layers of the ER between Armenia and Azerbaijan are then explored at systemic, interstate, domestic, decision-maker, and temporal levels, with a view more toward identifying directions for future research than conclusive findings. Among the article's tentative conclusions are the primacy of endogenous over exogenous factors in explaining the durability of the rivalry between Armenia and Azerbaijan, the impacts of the passage of time on the human and physical geography of the territory under dispute, and the convergence of conflict dynamics across disparate levels.