Linear Aggregation of SSB Utility Functionals

A necessary and sufficient condition for linear aggregation of SSB utility functionals is presented. Harsanyi's social aggregation theorem for von Neumann–Morgenstern utility functions is shown to be a corollary to this result. Two generalizations of Fishburn and Gehrlein's conditional linear aggregation theorem for SSB utility functionals are also established.     

Sleep and Its Association With Socioeconomic Status,Health, and Risky Behaviors Among Ghanaian School Children

Socioeconomic differences in sleep and how sleep relates to health and risky behaviors among 12‐ to 18‐year‐old Ghanaians (N = 1,195) were investigated. Overall, 49.2% of boys and 60.8% of girls had inadequate sleep. Girls (OR = 1.6, 95% CI = 1.3–2.0) and older (16‐ to 18‐year‐olds) adolescents (OR = 1.6, 95% CI = 1.3–2.1) had higher probability of inadequate sleep than boys and younger (12‐ to 15‐year‐old) adolescents, respectively. High material affluence, low parental education, low parental occupational grade, drunkenness, marijuana use, drug use, and not having plans to continue schooling after graduation decreased the chances of inadequate sleep, while low school performance, low fruit and vegetable intake, and tiredness during daytime increased the probability of inadequate sleep. Promotion of adequate sleep and gender equality should be taken into consideration in adolescent health promotion programs.     

Procedures for preventing juvenile violence in Switzerland: the Zurich model

The Swiss legal system places strong emphasis on risk assessment and treatment of potentially violent offenders. Especially after the 2001 Zug massacre, there is close cooperation between the judicial and mental health systems to prevent violence through early detection and intervention. A case study of a risk management program for a dangerous seventeen-year-old delinquent youth illustrates this approach.     

Fast tensorial JADE

We propose a novel method for tensorial‐independent component analysis. Our approach is based on TJADE and k‐JADE, two recently proposed generalizations of the classical JADE algorithm. Our novel method achieves the consistency and the limiting distribution of TJADE under mild assumptions and at the same time offers notable improvement in computational speed. Detailed mathematical proofs of the statistical properties of our method are given and, as a special case, a conjecture on the properties of k‐JADE is resolved. Simulations and timing comparisons demonstrate remarkable gain in speed. Moreover, the desired efficiency is obtained approximately for finite samples. The method is applied successfully to large‐scale video data, for which neither TJADE nor k‐JADE is feasible. Finally, an experimental procedure is proposed to select the values of a set of tuning parameters. Supplementary material including the R‐code for running the examples and the proofs of the theoretical results is available online.     

Whose history should be dealt with in a pluricultural context – immigrant adolescents’ approach

This study focuses on migrant adolescents’ perspective on history education with special reference to their families’ home country. The data consist of qualitative interviews with 36 students from various migrant groups (aged 14–16 years). The history of the home country seemed to be significant for the students and they would have wanted to hear about it in school; but in most cases, the main source of information had been family or media.     

Analyzing the Cost of Screening Selectee and Non-Selectee Baggage

Determining how to effectively operate security devices is as important to overall system performance as developing more sensitive security devices. In light of recent federal mandates for 100% screening of all checked baggage, this research studies the trade-offs between screening only selectee checked baggage and screening both selectee and non-selectee checked baggage for a single baggage screening security device deployed at an airport. This trade-off is represented using a cost model that incorporates the cost of the baggage screening security device, the volume of checked baggage processed through the device, and the outcomes that occur when the device is used. The cost model captures the cost of deploying, maintaining, and operating a single baggage screening security device over a one-year period. The study concludes that as excess baggage screening capacity is used to screen non-selectee checked bags, the expected annual cost increases, the expected annual cost per checked bag screened decreases, and the expected annual cost per expected number of threats detected in the checked bags screened increases. These results indicate that the marginal increase in security per dollar spent is significantly lower when non-selectee checked bags are screened than when only selectee checked bags are screened.     

Learning to teach history in culturally diverse classrooms

This paper examines prospective history teachers’ thinking about ethnic and cultural diversity and their experiences of learning to teach about history in multicultural classrooms. The paper reviews the findings of a follow‐up study of 22 Finnish student teachers during their nine‐month teacher education programme. The data consist of questionnaire data and various written assignments of this sample, plus interviews with nine selected persons. According to the results, signs of continuity and transformation are apparent in the student teachers’ thinking. The informants frequently described problems related to diversity, although most of them did not see diversity as changing their way of teaching history as such.     

Aesthetic leadership

We introduce aesthetic leadership as a promising approach in leadership studies. Two current movements in leadership research, the inclusion of followers in leadership models and the exploration of subjective leadership qualities, make taking an aesthetic perspective in leadership especially attractive and timely. Aesthetics relates to felt meaning generated from sensory perceptions, and involves subjective, tacit knowledge rooted in feeling and emotion. We believe the aesthetics of leadership is an important, but little understood, aspect of organizational life. For example, while we know followers must attribute leadership qualities such as charisma and authenticity to leaders to allow for social influence, we know little about how these processes operate. We propose that followers use their aesthetic senses in making these assessments. We relate aesthetic leadership to several current topics in leadership research, and outline the assumptions and methods of aesthetic leadership.