Observing a telluric standard star for correcting the absorption lines of spectrum will take significant amount precious telescope time, especially in long-term spectral monitoring project. Beyond that, it's difficult to select suitable near both time and airmass scientific object. In this paper, we present method by combining advantages long slit spectroscopy. By rotating slit, observed object...

The acoustical comfort is now a comfort’s criterion which is taken into from the conception. The designers need therefore accurate tools to predict the acoustic quality of enclosures. Most of the acoustical comfort criteria are based on the reverberation time. When the room has proportionate dimensions and an uniform absorption, the statistical theory through Sabine or Eyring formulas allows go...

By careful definition of polymer environment, heparin i.r. spectra were examined in a region (750-950 cm-1) in which sulphate half-ester absorptions occur. Changes seen in this region when metal ion-heparin complexes are converted into heparinic acid, when heparin is carboxy-group-reduced and when various concentrations of Li(+)-heparin are examined are tentatively interpreted in terms of chang...

We have detected weak absorption features produced by the strong ν3 methane band at 3.3 μm in two L dwarfs, 2MASSW J1507476-162738 and 2MASSI J0825196+211552, classified by Kirkpatrick et al. (2000) as spectral types L5 and L7.5 respectively. These absorptions occur in objects warmer than any in which methane previously has been detected, and mark the first appearance of methane in the ultracoo...