The 2.5 GeV Synchrotron Light Source ANKA is now under construction at the Research Center in Karlsruhe. For a designed current of 400 mA, a power of 250 kW is radiated by the circulating e-beam in the 16 dipole magnets. 90% of the synchrotron radiation (SR) is absorbed by the 32 crotch absorbers in the dipole and the adjacent ante chamber, the remaining 10 % by distributed absorbers in the str...

We describe the synthesis of two new dumbbell-shaped small molecules used as near ultra-violet absorbers for transparent organic solar cell application. The electron-donor TAT units, sandwiching central chromophore, constitute very efficient ?-stacking platforms that are nevertheless highly soluble thanks to presence three alkyl chains. units in combination, with a electron donor unit, either c...

We present VLT-UVES echelle spectra of the Lyα emission and absorption in five radio galaxies at redshifts z=2.55–4.1. Together with data from our pilot study, we have a sample of 7 such systems with radio source sizes ∼ 1 − 90 kpc with which to address the origin of the absorbing gas. Echelle resolution again reveals that some systems with NHI > 10 cm in lower resolution data in fact consist o...

The use of solar collectors with coloured absorbers for water heating is an area of particular interest when considering their integration with buildings. By matching the absorber colour with that of the roof or façade of the building, it is possible to achieve an architecturally and visually pleasing result. Despite the potential for the use of coloured absorbers very little work has been unde...

We have carried out a high angular resolution near-infrared imaging study of the fields of 6 quasars with 7 strong absorption line systems at z < 0.5, using the Hokupa’a adaptive optics system and the QUIRC near-infrared camera on the Gemini-North telescope. These absorption systems include 4 classical damped Lyman-alpha absorbers (DLAs), 2 sub-DLAs, and one Lyman-limit system. Images were obta...

This paper presents a numerical model for the calculation of the transmission loss of a panel with an array of tuned vibration absorbers attached. The transmission loss of the panel is calculated for the case of the bare panel, with tuned vibration absorbers attached, and equivalent blocking masses. The theoretical predictions of transmission loss are compared with experimental measurements.

Observations of warm absorbers provided new ways to study the nuclear environments of AGNs. I discuss basic properties of warm absorbers and early developments with ROSAT, ASCA and HST observations. I briefly touch upon recent advances made with Chandra and FUSE. Key-words : quasars: absorption lines– ultraviolet: galaxies– X-rays: galaxies

We have compiled a new and extensive catalog of heavy-element QSO absorption line systems and analyzed the distribution of absorbers in bright and faint QSOs, to search for gravitational lensing of background QSOs by the matter associated with the absorbers. There is a highly significant excess of C iv absorbers in bright QSOs in the redshift range z = 1.2 − 3.2, and this excess increases stron...

We report on a survey for narrow (FWHM < 600 km s) C iv absorption lines in a sample of bright quasars at redshifts 1.8 6 z < 2.25 in the Sloan Digital Sky Survey. Our main goal is to understand the relationship of narrow C iv absorbers to quasar outflows and, more generally, to quasar environments. We determine velocity zeropoints using the broad Mg ii emission line, and then measure the absor...