Biosignatures from Earth-Like Planets Around M Dwarfs

Coupled one-dimensional photochemical-climate calculations have been performed for hypothetical Earth-like planets around M dwarfs. Visible, near-infrared and thermal-infrared synthetic spectra of these planets were generated to determine which biosignature gases might be observed by a future, space-based telescope. Our star sample included two observed active M dwarfs, AD Leo and GJ 643, and three quiescent model stars. The spectral distribution of these stars in the ultraviolet generates a different photochemistry on these planets. As a result, the biogenic gases CH4, N2O, and CH3Cl have substantially longer lifetimes and higher mixing ratios than on Earth, making them potentially observable by space-based telescopes. On the active M-star planets, an ozone layer similar to Earth's was developed that resulted in a spectroscopic signature comparable to the terrestrial one. The simultaneous detection of O2 (or O3) and a reduced gas in a planet's atmosphere has been suggested as strong evidence for life. Planets circling M stars may be good locations to search for such evidence.Comment: 34 pages, 10 figures, Astrobiology, in pres

Learning and Teaching in Social Work Education: Assessment

No abstract available

Social work and faith-based agencies in Sweden and Australia

The roles which faith-based agencies play in social work provision vary between countries. This article provides an overview of social work provision by the Church of Sweden in Sweden and the Catholic Church in Australia and explores how different relationships between faith-based organizations and professional social work practice have emerged in different countries. The article concludes with questions about the role of faith-based agencies which readers can reflect upon in their own contexts

Social work and spirituality in a secular society

&bull; Summary: In an increasingly secular era which finds only a small minority of the population regularly participating in organized religion, there is emerging interest in how spirituality can be incorporated into social work practice. This article proposes one way in which this might occur in `deliberately secular\u27 nations such as Australia.&bull; Findings: A framework in which spirituality is considered to be an aspect of lived experience is proposed. Dimensions of life which can be incorporated into such a framework include life rituals, creativity, social action, and sense of place.&bull; Applications : Conceptualizing spirituality in a way which does not use specifically religious language or concepts, may enable discussion of spiritual issues to be incorporated into social work practice when either practitioners or service users have or no religious background or affiliation or no shared religious background.<br /

The Relationship Between Gambling Cognitions, Psychological States, and Gambling: A Cross-Cultural Study of Chinese and Caucasians in Australia

High rates of gambling and problem gambling among the Chinese have been well documented in anecdotal and empirical reports. However, there is a lack of research on the relationship between important gambling correlates (e.g., gambling cognitions and psychological states) and gambling. This study investigated the role of gambling cognitions and psychological states on problem gambling behavior among 501 participants (306 Caucasians and 195 Chinese living in Australia). Participants completed the South Oaks Gambling Screen, the Depression, Anxiety and Stress Scale (DASS), and the Gambling Related Cognitions Scale (GRCS). A significant positive relationship between GRCS and DASS on problem gambling behavior was found for both groups. Further gender disparities in anxiety, stress, and illusion of control were revealed for both ethnicities. Implications of these findings and possible future research are discussed

The attractions and risks of Internet gambling for women: a qualitative study

In this qualitative study, 25 females were interviewed who gambled frequently on the Internet. This paper describes the women’s views about the Internet as a place to gamble and the associated risks. Volunteers were recruited from a wide range of sources in the UK and included 16 problem gamblers and 9 frequent gamblers. The women identified a number of features of the Internet that made it easy to gamble, such as its accessibility from home, its anonymity, and its privacy. The Internet was seen as less of a male domain and a place where women could learn to gamble. Frequent gamblers saw Internet gambling as a fun and social activity. All women recognised that they were at risk of excessive Internet gambling, and frequent gamblers had developed strategies to reduce these risks. The paper concludes with some measures that could identify and support those at risk