Akteure literarischer Kommunikation

Bogdal K-M. Akteure literarischer Kommunikation. In: Fohrmann J, Müller H, eds. Literaturwissenschaft. München; 1995: 273-296

Particle transport processes at slope environments - event driven flux across the Barents Sea continental margin

Recent studies of the vertical flux of organic matter into the deep ocean have prompted the search for key organic compounds (biomarkers) as tracers for its production, flux and burial into the sediment. Particulate matter was collected with sediment traps moored at the Barents Sea continental margin (75°11.78′N/12°29.21′E; water depth 2050 m) at 610, 1840 and 1950 m depth. The compositions of the organic material in the two bottoms near traps differ significantly. This difference cannot be the result of a change of the vertical sedimentation alone. A combination of biomarker analyses, quantitative microscopy and bulk parameter determinations on water and sediment trap samples is used in this study to demonstrate that a turbidity plume event at the shelf edge is a vehicle to transport organic and lithogenic particles at high velocities to the benthos of the lower continental margin. It is suggested that fine particles were advected into the trap at 1850 m, whereas the coarser fraction of higher settling velocities, passing several resuspension loops entered the lower trap

A propos Doktor Faustus. Briefwechsel Arnold Schönberg - Thomas Mann, Tagebücher, Aufsätze 1930-1951. Übers. von S. Müller u. E. Schwägerle. E. Randol Schoenberg (Hg.), Wien 2009

Rencension

The Large Cylindrical Drift Chamber of Tasso

We have built and operated a large cylindrical drift chamber for the TASSO experiment at the DESY storage ring, PETRA. The chamber has a length of 3.5 m, a diameter of 2.5 m, and a total of 2340 drift cells. The cells are arranged in 15 concentric layers such that tracks can be reconstructed in three dimensions. A spatial resolution of 220 μm has been achieved for tracks of normal incidence on the drift cells

The Tasso Gas and Aerogel Cherenkov Counters

We describe the gas and erogel threshold Cherenkov counters built for the TASSO experiment at the DESY $e^+ e^−$ storage ring PETRA. The counters are arranged in two diametrically opposed groups as part of the two hadron arms. The gas counters contain Freon 114 and CO$_2$ respectively; 128 ellipsoidal mirrors focus the Cherenkov light through funnels onto Philips 5″ photomultipliers coated with wavelength shifter. $\beta$ = 1 charged particles are detected with at least 99.9% efficiency. The aerogel counters are of the diffusing wall type. They have a sensitive area of 12 m$^2$, divided into 32 cells and use a total of 192 RCA Quantacon 5″ photomultipliers. The average aerogel refractive index is around 1.025. The efficiency for $\beta$ = 1 charged particles is 98%. Design considerations, prototype evaluation, construction details, and performance of the final counter system are described

The TASSO gas and aerogel Cerenkov counters

Submitted to Nuclear Instruments and Methods.SIGLEDEGerman