Review and assessment of the potential of post-IR IRSL dating methods to circumvent the problem of anomalous fading in feldspar luminescence

Quartz has been the main mineral used for optically stimulated luminescence (OSL) dating of sediments over the last decade. The quartz OSL signal, however, has been shown to saturate at relatively low doses of ～200–400 Gy, making it difficult to be used for dating beyond about 200 thou-sand years (ka), unless the environmental dose rate is low. The infrared stimulated luminescence (IRSL) from feldspars has been shown to continue to grow to higher dose levels than quartz OSL. The application of IRSL dating of feldspars, however, has long been hampered by the anomalous fading effect. Recent progress in understanding anomalous fading of the infrared stimulated luminescence (IRSL) signals in potassium-feldspar has led to the development of post-IR IRSL (pIRIR) protocols and also a multiple elevated temperature (MET) stimulation (MET-pIRIR) protocol. These procedures have raised the prospect of isolating a non-fading IRSL component for dating Quaternary deposits containing feldspars. In this study, we review the recent progress made on (1) overcoming anomalous fading of feldspar, and (2) the development of pIRIR dating techniques for feldspar. The potential and problems associated with these methods are discussed.     

Psychosurgery in Sweden 1944-1964

This study presents results on hitherto unknown data on lobotomies performed at the former State Mental Hospital of Umedalen (from here on called simply "Umedalen") in the north of Sweden. More than 700 operations were carried out from 1947 through 1960, and we calculated the average rate of postoperative mortality to 7.4 percent, and that 63 percent of those who were operated were women. By considering annual hospital reports to the National Board of Health (Medicinalstyrelsen), we also made the first mapping of early psychosurgery in Sweden; approximately 4,500 lobotomies were performed between 1944 and 1966. Statistical analysis, qualitative content analysis, and discourse analysis were used. The study supports earlier findings of female preponderance in the number of lobotomy operations.     

Taiwan: Changes and Challenges

In January and March 2008, Taiwan's citizens voted primarily for domestic political reasons to oust the Democratic Progressive Party administration and promulgate the second peaceful transfer of power in Taiwan's relatively young democracy. Surveys suggest that the new administration of President Ma Ying-jeou in its first few months in office has failed to meet voter expectations. Taiwan's new international relations with the United States, Japan and China have also raised concerns both within Taiwan and overseas.