Persistent luminescence mechanisms: human imagination at work

The present status and future progress of the mechanisms of persistent luminescence are critically treated with the present knowledge. The advantages to be achieved by a further need as well as the pitfalls of the excessive use of imagination are shown. As usual, in the beginning of the present era of persistent luminescence since the mid 1990s, the imagination played a more important role than the sparse solid experimental data and the chemical common sense and knowledge was largely ignored. Since some five years, the mechanistic studies seem to have reached the maturity and - perhaps deceivingly - it seems that there are only details to be solved. However, the development of red emitting nanocrystalline materials poses a challenge also to the more fundamental studies and interpretation. The questions still luring in the darkness include the problems how the increased surface area affects the defect structure and how the "persistent energy transfer" really works. There is still some light to be thrown onto these matters starting with agreeing on the terminology: the term phosphorescence should be abandoned altogether. The long lifetime of persistent luminescence is due to trapping of excitation energy, not to the forbidden nature of the luminescent transition. However, the technically well-suited term "afterglow" should be retained for harmful, short persistent luminescence. (C) 2012 Optical Society of America

How does socio economic position link to health behaviour? Sociological pathways and perspectives for health promotion

Socio economic inequalities in adult health behaviour are consistently observed. Despite a well-documented pattern, social determinants of variations in health behaviour have not been sufficiently clarified. This article therefore presents sociological pathways to explain the existing inequalities in health behaviour. At a micro level, control beliefs have been part of several behavioural theories. We suggest that these beliefs might bridge the gap between sociology and psychology by emphasising their roots in fundamental socio-economic environments. At a meso level, social networks and support have not been explicitly considered as behavioural determinants. This contribution states that these social factors influence health behaviour while being unequally distributed across society. At a macro level, characteristics of the neighbourhood environment influence health behaviour of its residents above and beyond their individual background. Providing further opportunity for policy makers, it is shown that peer and school context equalise inequalities in risky behaviour in adolescence. As a conclusion, factors such as control expectations, social networks, neighbourhood characteristics, and school context should be included as strategies to improve health behaviour in socially disadvantaged people.

"Hey, Hey, He Gay, He Gay . . . Okay" . . . Or Is It?: The Sociological Importance of Bruno

Sacha Baron Cohen is a British comedian who has garnered a great deal of controversy over the years. Through his characters, Ali G, Borat, and Bruno, he attempts to trick people into letting down their guards and revealing any prejudices (racism, anti-Semitism, homophobia, misogyny, et cetera) that they may have. In doing so, each of his three characters has sparked a debate concerning the different issues they bring up: with Ali G, it was whether the character was racist or exposed racism; with Borat, it was whether the character was anti-Semitic or revealed anti-Semitism; and with Bruno, it is whether the character reinforces homophobia or mocks it. I am concerned with the last of these three debates, specifically in relation to Baron Cohen's film Bruno. Many say the film reinforces gay stereotypes and is thus harmful for the gay community, while a seemingly equal number of people say it effectively mocks homophobia and is thus beneficial for the gay community. Using the data I collected from thirty-one interviews conducted after five separate screenings of the film, I argue that Bruno is not harmful for the gay community as audiences understood that the Bruno character is based on exaggerated stereotypes of homosexuals. That is, the film did not reinforce any negative stereotypes. But, I also explain that the film did not change any opinions on homosexuality either. Also in this work, I argue that within the world of cinema, Bruno fails to fit into any pre-existing genre, including the 'mock-documentary' genre where it is most commonly placed. Rather, I suggest the film is better categorized as what I call a Real Fake Mock-documentary. While 'mock-documentaries' are made up of fictional characters in fictional situations, this new term encompasses the fact that Bruno involves a fictional character placed into real situations. I conclude by noting that the content, release, and debate surrounding Bruno all reveal that it is still difficult to bring up the issue of homosexuality in American society, even forty years after the Civil Rights era.