Regions in the dominant chamber and nilpotent orbits

We give a geometric description for the dominant characteristic of a nilpotent orbit in an arbitrary finite-dimensional rational G-module. In particular, we obtain a generalization of a recent result of Gunnells-Sommers, see math.RT/0212089.Comment: LaTeX2e, 6 page

DEFENDING ALL-MALE EDUCATION: A NEW CULTURAL MOMENT FOR A RENEWED DEBATE

Although all-female schools still prosper and are defended by members of the academic elite, an all-male college has become a near-extinct species. Many people are surprised such a creature still exists. All-male colleges strike many as vestiges of male privilege. They evoke the traditional bastions of power that precluded women from advancing in public life. Single-sex education is not for everyone, but if our educational system is to be truly pluralistic, such an education should be an option. Single-sex education for both genders can be a constructive way to address problems plaguing not only education but the culture as a whole. Educators are now more willing to reevaluate all-male education. While research on single-sex education focuses on women, its conclusions often show significant gains for both genders. Indeed, those who experience an all-male education are usually eager to talk of its empowering effect. In our society, sex is used and exploited as the primary means of self-expression and ultimate fulfillment. It is possible that the single-sex atmosphere might help put such distorted claims into a better perspective. It is time for a new debate about all-male education

Die Plagegeister des Sommers

In diesen Tagen werden die Deutschen von allerlei Tieren generv

Clustering of sex and substance use behaviours in adolescence

BACKGROUND Adolescents often experiment with substance use and sexual activity, which can impact upon their health and well-being, and establish harmful patterns of behavior which continue into adulthood. While substance use and participation in sexual behaviors often co-occur, few studies have examined whether these behaviors cluster in adolescence. OBJECTIVE To investigate clustering of sexual activity and substance use among youth in Northern Ireland. METHOD Data from 875 young people (aged 16) who participated in the 2008 Northern Ireland Life and Times Survey were used to investigate clustering using the Odds/Expected ratio method. Gender differences in clustering were explored. RESULTS Alcohol consumption was the most prevalent risk behavior (75%), followed by cigarette smoking, sexual intercourse, illicit substance use, and solvent use the least prevalent. Over 40% of young people participated in multiple risk behaviors (2 or more). Several behavior combinations were statistically clustered, for most the reported prevalence was lower than expected, however, participation in all five risk behaviors occurred at a much higher rate than expected, particularly for male youth. CONCLUSIONS While experimentation with risky behaviors is often considered developmentally appropriate in adolescence it is important to understand how young people experience these behaviors, and the potential for multiple risk exposures as a result of participation in substance use and sexual behaviors. These findings highlight the clustering of substance use and sexual behaviors, and indicate variations in vulnerability to participation in multiple risk behaviors by gender