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Since cartilage contains neither blood nor lymph vessels, diffusion is the most important transport process for the supply of cartilage with nutrients and for the removal of metabolic waste products. Therefore, diffusion measurements are of high interest in cartilage research. Different techniques of diffusion measurements exist. Here we describe methods(More)
Rheumatic diseases are accompanied by a progressive destruction of the cartilage layer of the joints. Despite the frequency of the disease, degradation mechanisms are not yet understood and methods for early diagnosis are not available. Although some information on pathogenesis could be obtained from the analysis of degradation products of cartilage(More)
Pulsed field gradient (PFG) nuclear magnetic resonance (NMR) was used to investigate the self-diffusion behaviour of polymers in cartilage. Polyethylene glycol and dextran with different molecular weights and in different concentrations were used as model compounds to mimic the diffusion behaviour of metabolites of cartilage. The polymer self-diffusion(More)
Rheumatic diseases are accompanied by a progressive destruction of the cartilage layers of the joints. Although the number of patients suffering from rheumatic diseases is steadily increasing, degradation mechanisms of cartilage are not yet understood, and methods for early diagnosis are not available. Although some information on pathogenesis could be(More)
Segregation structures of granular mixtures in rotating drums represent classical examples of pattern formation in granular material. We investigate the coarsening of axial segregation patterns of slurries in a long horizontally rotating cylinder. The dynamics and the three-dimensional geometry of the segregation structures are analyzed with optical methods(More)
Zusammenfassung. Statistical parametric mapping (SPM) ist ein umfangreiches, auf Matlab basierendes Softwarepaket zur bildgestützten Analyse in der funktionellen Hirnbildgebung. Es dient zum Nachweis von Aktivitätsänderungen in Hirnarealen bei Durchführung definierter Aufgaben und Wahrnehmung sensorischer Stimuli mittels fMRT, SPECT oder PET. Je nach(More)
In software radio systems, a digital IIR filter offers good roll-off and transition bandwidth characteristics using a low amount of arithmetic components, thus simplifying hardware implementation. However, IIR filter structures are very sensitive to finite precision compared to FIR filter structures. In order to design a high quality, low component count,(More)
We report the formation of axial segregation patterns of bidisperse granular mixtures of glass beads in a spherical container which is rotated about a central axis. When the rotation axis is horizontal, three distinct segregation bands are formed for a broad range of geometrical and dynamical parameters. We find two distinct regimes: at low fill levels the(More)
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