由卡特琳娜和丽塔飓风引发的灾难人类学思考

新奥尔良市在2005年所遭受的卡特琳娜和丽塔飓风和水灾袭击,为美国数十年来最大的自然灾害之一。这两次飓风也唤醒了学者对灾难研究的注意力。灾难不仅冲击了社会结构,造成了不同群体聚合或边缘化,也作为一种显示器,昭示在灾难过程中最为脆弱的是穷人群体。人类学家不仅要研究灾难的影响与结果,也应该联合起来,参与救灾活动,直接为受害群体提供援助。     

Extrapolation of Carcinogenicity Between Species: Qualitative and Quantitative Factors

Prediction of human cancer risk from the results of rodent bioassays requires two types of extrapolation: a qualitative extrapolation from short-lived rodent species to long-lived humans, and a quantitative extrapolation from near-toxic doses in the bioassay to low-level human exposures. Experimental evidence on the accuracy of prediction between closely related species tested under similar experimental conditions (rats, mice, and hamsters) indicates that: (1) if a chemical is positive in one species, it will be positive in the second species about 75% of the time; however, since about 50% of test chemicals are positive in each species, by chance alone one would expect a predictive value between species of about 50%. (2) If a chemical induces tumors in a particular target organ in one species, it will induce tumors in the same organ in the second species about 50% of the time. Similar predictive values are obtained in an analysis of prediction from humans to rats or from humans to mice for known human carcinogens. Limitations of bioassay data for use in quantitative extrapolation are discussed, including constraints on both estimates of carcinogenic potency and of the dose-response in experiments with only two doses and a control. Quantitative extrapolation should be based on an understanding of mechanisms of carcinogenesis, particularly mitogenic effects that are present at high and not low doses.     

Investing in Leaving: The Greek Case of International Migration of Professionals

In the last twenty years, the ‘international migration of professionals’ from Greece has increased. This paper is based on an extensive survey of Greek professionals who work or have worked in another country. It is the first ever research on the topic in Greece and the first one in the international literature to include participants who are currently abroad or have repatriated. The aim of the paper is threefold. First, it presents the main characteristics of this phenomenon. Second, to explain why Greece, alongside other peripheral countries, suffers from migration of its professionals: in contrast to a dominant view insisting on an allegedly abundant supply of highly skilled labour, it is argued that the phenomenon is primarily due to their low demand in the Greek labour market. Third, to argue that such migration can have positive implications for a country, not only when these people return but also when they stay abroad.     

Videoconferencing: A Viable Teaching Strategy for Social Work Education?

The findings of a study that examined students' reports about their experience with ITV are presented. The results are based on two different courses with different instructors and different composition of students. Results show that students in both sites report that the use of technology does not compromise their learning but they dislike it. Strategies for future research to understand the nature of the reaction are suggested.     

Is “Walkability” A Useful Concept for Gerontology?

The study tested two hypotheses: that in a walkable neighborhood, residents will exercise more, eat healthier, and suffer from less obesity and that relation between environment and health outcomes will be stronger for the elderly. Health was measured by physical activity, the number of portions of fruits and vegetables eaten daily, and body mass index. Walkability was measured by three distinct environmental factors—distress, amenities, and residential. The three health outcomes were related to the three environmental factors. Age was not a significant predictor of health outcomes. Although the environment does contribute to health outcomes, the ways that contribution is expressed and its relation to age is complex.