Flume LES of a glued spheres layer – Detailed analysis of initial motions of a single grain

River morphodynamics and sediment transportMechanics of sediment transpor

Perylene dye@SiO 2 core–shell nanoparticles with intense fluorescence

PD/CC@SiO2 core–shell nanoparticles (PD: perylene dye, CC: cholecalciferol/vitamin D3) were prepared using a water-based injection method. Specifically, a solution of the PD (fluorescent red (FR), fluorescent orange (FO), fluorescent yellow (FY)), CC, and octyltriethoxysilane (OTES) as a silica precursor in ethanol was injected in water at 70 °C and pH 5. The core–shell nanoparticles exhibited an outer particle diameter of 29 ± 11 nm and an inner core of 12 ± 4 nm. Suspensions (up to 10 mg mL−1) were colloidally highly stable due to the negative surface charging (−40 to −50 mV). CC efficiently allowed disturbing of the π-stacking of the PD, such that, e.g., FR/CC@SiO2 nanoparticles with 10 wt% FR showed intense emission with quantum yields near unity (98%) and without any concentration quenching. In contrast to the freely-dissolved dyes, PD in the nanoparticle core did not show any photobleaching even after 20 hours of continuous UV illumination (280 nm). As proof-of-the-concept, suspensions and thin films were realised showing intense emission from red to yellow. Exemplarily, FR/CC@SiO2 core–shell nanoparticles were examined in detail, including electron microscopy, element mapping, dynamic light scattering, infrared spectroscopy, elemental analysis, UV-Vis spectroscopy, and photoluminescence spectroscopy

Numerical simulation of scour development due to submerged horizontal jet

River engineeringNumerical modelling in river engineerin

Implementation of a new Layer-Subroutine for fractional sediment transport in SISYPHE

Water Qualit

One- and three-dimensional modeling of surge generated during operation of the hydropower plants Mühlbach and Maiermühle in Landsberg on the Lech River

River hydrodynamicsInteraction with structure

Brain activation during dichoptic presentation of optic flow stimuli

The processing of optic flow fields in motion-sensitive areas in human visual cortex was studied with BOLD (blood oxygen level dependent) contrast in functional magnetic resonance imaging (fMRI). Subjects binocularly viewed optic flow fields in plane (monoptic) or in stereo depth (dichoptic) with various degrees of disparity and increasing radial speed. By varying the directional properties of the stimuli (expansion, spiral motion, random), we explored whether the BOLD effect reflected neuronal responses to these different forms of optic flow. The results suggest that BOLD contrast as assessed by fMRI methods reflects the neural processing of optic flow information in motion-sensitive cortical areas. Furthermore, small but replicable disparity-selective responses were found in parts of Brodmann's area 19