Capturing surface appearance is important for a large number of applications. Appearance of real world surfaces is dif cult to model as it varies with the direction of illumination as well as the direction from which it is viewed. Consequently, measurements of the BRDF (bidirectional reectance distribution function) have been important. In addition, many applications require measuring how the e...

Unpleasant odor emissions have traditionally occupied an important role in environmental concern. In this paper, twin biotrickling filters (BTFs) packed with different packing materials, seeded with Bacillus cereus GIGAN2, were successfully constructed to purify gaseous dimethyl disulfide (DMDS). The maifanite-packed BTF showed superior biodegradation capability to the ceramic-packed counterpar...

BACKGROUND High-frequency pressure oscillations created by gas bubbling through an underwater seal during bubble CPAP may enhance ventilation and aid in lung recruitment in premature infants. We hypothesized that there are no differences in the magnitude of oscillations in lung volume (ΔV) in a preterm neonatal lung model when different bubble CPAP systems are used. METHODS An anatomically re...

The system of equations, usually employed for unsteady liquid/gas flows, has complex characteristics. This as well as other facts have led to the search for a more accurate description of effects associated with relative motion. For liquid/bubble systems the fluctuations resulting from hydrodynamic interaction between the bubbles may be taken into account in the same way as particle interaction...

Collective instabilities are a potential limiting factor for the performance of the FAIR rings at GSI Darmstadt. Here, we discuss results of numerical investigations for SIS 100 and for the SIS 18 Upgrade together with experimental investigations in the SIS 18 synchrotron. Within our experimental investigations, the first measurement of the transverse Beam Transfer Function (BTF) in SIS 18 were...

The effect of distributed bubble nuclei sizes on shock propagation in dilute bubbly liquids is computed using a continuum two-phase model. An ensemble-averaging technique is employed to derive the statistically averaged equations and a finitevolume method is used to solve the model equations. The bubble dynamics are incorporated using a Rayleigh-Plesset-type equation which includes the effects ...

The accuracy of the numerical simulation in the prediction of cavita-tion in cryogenic fluids is of critical importance for the efficient design and performance of turbopumps in rocket propulsion systems. One of the main challenges remains the efficiency in modeling the physics, handling the multi-scale properties and developing robust numerical methodologies. Such flows involve thermodynamic p...

Visual effects play an important role in the film and game industry, In both, the observer immerses into a virtual world which comes already amazingly close to the real world. One approach is to collect parts of the real world and reassamble them at will. When following this approach for complicated surface materials, the material must be recorded for many different viewing and illumination con...