Anthropogenic Space Weather

Anthropogenic effects on the space environment started in the late 19th century and reached their peak in the 1960s when high-altitude nuclear explosions were carried out by the USA and the Soviet Union. These explosions created artificial radiation belts near Earth that resulted in major damages to several satellites. Another, unexpected impact of the high-altitude nuclear tests was the electromagnetic pulse (EMP) that can have devastating effects over a large geographic area (as large as the continental United States). Other anthropogenic impacts on the space environment include chemical release ex- periments, high-frequency wave heating of the ionosphere and the interaction of VLF waves with the radiation belts. This paper reviews the fundamental physical process behind these phenomena and discusses the observations of their impacts.Comment: 71 pages, 35 figure

Learning strategies in reading and writing: EAP contexts

Presently, the importance of culture and context is becoming a significant feature of research in the field of learning strategies. To date, there has been little research into learning strategies utilized for reading and writing in Asian EAP (English for Academic Purposes) contexts, and in particular in the Thai context. With this in mind, this research investigated learning strategies employed by undergraduate students at a Thai university studying EAP reading and writing courses. The research aimed to identify the most frequently used strategies and different strategy use between ‘successful’ and ‘less successful’ learners. Learning strategies were classified following Oxford’s (1990) six category taxonomy and an additional category of negative strategies. The results revealed metacognitive, cognitive and compensation as the most frequently used strategies overall. Differences in strategy use for successful and less successful readers and writers were also demonstrated. A number of affective and social strategies were identified in the quantitative analysis which needed further investigation. Furthermore, various strategies investigated in earlier learner strategy research seemed, based on this research, to be culturally inappropriate in the Thai context