In this paper we give a geometrical interpretation of an extension of mixed Hodge structures (MHS) obtained from the canonical MHS on the group ring of the fundamental group of a hyperelliptic curve modulo the fourth power of its augmentation ideal. We show that the class of this extension coincides with the regulator image of a canonical higher

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We present Keck K-band observations of GX 17+2 which reveal a bright counterpart in the radio error circle of Deutsch et al. (1999), coincident with their star ``A''. These observations imply an amplitude of variability of ~25--40 between our measurements and the IR observations of Deutsch et al. (1999). However, quasi-simultaneous RXTE ASM

``Böhm-Vitense gaps,'' discontinuities in the color distribution of A-F type stars along the main sequence, have traditionally been attributed to the abrupt onset of strong convection (8000 K>=Teff>=6400 K) in stellar atmospheres and envelopes. Using the full spectrum of turbulence model to describe convective transport (Canuto, Goldman, &

A realistic simulation of the stellar system α Cen A+B as it would be seen by MONS satellite has been generated in the "MONS Time-series simulation and analysis Team". The simulation apparently includes all properties known of the stars, instrumental noise sources and sensitivity properties expected. We have been working with this data series

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