We summarize photometric and spectroscopic observations of V463 Sct (Nova Sct 2000), which was originally thought to be a red variable. The spectrum taken on 2000 March 16.81 UT showed prominent emission lines with a FHWM of 990 km s (Hα). The light curve shows a conspicuous premaximum halt lasting at least for 24 d, and a late-phase flare-like maximum. The nova then started rapidly fading at a...

(Grossman and Helpman 2004) have emphasized that the incompleteness of contracts in distant input-output linkages fosters agglomeration of downstream and upstream firms in the core region despite wage differential favoring to the periphery. Following this argument, this paper introduces uncertainty in input-output linkages in a NEG framework. We argue that uncertainty involves a coordination co...

HIV/AIDS has spread hard and fast in Africa over the past two decades, over seventy percent of all new HIV infections take place in Africa (UNAIDS, 2003). Sub-Saharan Africa has been especially affected, where several countries, such as Botswana, Malawi and Swaziland, have reached adult prevalence rates of 20% and over. As the disease is increasingly impacting on the social, economic, cultural ...

We describe an improved method for dating buried paleosols using measurements of the cosmic-ray-produced radionuclides Be and Al in quartz grains, and apply it to a sequence of intercalated tills and paleosols in central Missouri, USA, that record Plio-Pleistocene advances of the Laurentide Ice Sheet. A buried paleosol implies a period of surface exposure and nuclide accumulation, followed by b...