Model checking of open pushdown systems (OPD) w.r.t. standard branching temporal logics (pushdown module checking or PMC) has been recently investigated in the literature, both in the context of environments with perfect and imperfect information about the system (in the last case, the environment has only a partial view of the system’s control states and stack content). For standard CTL, PMC w...

We describe a free-space common-path polarization Sagnac interferometer. The polarization Sagnac interferometer is used in a symmetric fashion with detection on the dark fringe of the interference to avoid photodetector saturation when high-powered illumination is used. By modulating the carrier field that is reflected from the interferometer, we generate a local oscillator for heterodyne detec...

Other comments: Chromosomal location is unknown for the nine markers. The loci containing imperfect repeats (namely Sat4, Sat5 and Sat8) showed the greatest variability in allele size. Mutations leading to such differences in number of repeats probably involve processes other than mispairing slippage, which generates convergent mutations less frequently. Differences in allele size of Nine polym...

Major W. M. Hoddicu, of the Royal Engineers, has published a very interesting little pamphlet* on the work done by drainage and other works in St. Lucia in the West Indies in the years 1902-03. St. Lucia, like all other islands and ports in the West Indies, is gravely threatened by yellow fever, and as we have on another occasion noticed that the fear of this deadly fever has made anti-mosquito...