This paper presents efficient algorithms for free path sampling in heterogeneous participating media defined either by high-resolution voxel arrays or generated procedurally. The method is based on the concept of mixing “virtual” material or particles to the medium, augmenting the extinction coefficient to a function for which the free path can be sampled in a straightforward way. The virtual m...

A strain of Clostridium welchii produced spores in ordinary blood agar plates. Investigations confirmed that it was the character of this particular strain and that the laboratory media were not inducing sporulation. During a period of 12 months a total of 100 strains of Cl. welchii were studied. None of them produced spores in ordinary laboratory media and conditions when examined microscopica...

In this paper, free vibration analysis of a polymer-based nano-composite beam reinforced by boron-nitride nanotubes and subjected on elastic foundation, is studied. Smooth and defect-free nanotubes with uniform and directly- orientated in matrix are intended. Also, nanotubes’ distribution in the thickness direction of beam is regarded as a uniform distribution of the three different targeted on...

Erythromycin production is clearly enhanced by the addition of vegetable oils. However,whether this positive effect is brought about by the triglyceride or non-triglyceride fraction, isnot clear. The non-triglyceride portions of the oils accumulate in the waste during the refiningprocess leaving mainly triglycerides in the refined oil. In this research, sub-fractions of soybeanoil, including le...

Dusty gas flow through isotropic porous media is considered. The equations governing dusty gas flow through free space are intrinsically averaged in order to derive a comprehensive model that describes flow of a dusty gas through porous media. The developed model is capable of describing flow of mixtures with non-uniform number density through variable porosity media, while taking into account ...

This study was designed to quantitatively demonstrate via three-dimensional (3D) images, through the Synchrotron Radiation Phase-Contrast Microtomography (SR-PhC-MicroCT), the osteoinductive properties of a cortico-cancellous scaffold (Osteobiol Dual Block-DB) cultured with human Periodontal Ligament Stem Cells (hPDLSCs) in xeno-free media. In vitro cultures of hPDLSCs, obtained from alveolar c...

Mr. DEUTSCH. Mr. Speaker, as Russia prepares for Parliamentary and Presidential elections, there are alarming signals that the Kremlin is cracking down on privately owned news outlets who have been critical of government policies. In particular, I understand that the independent and highly regarded television station, NTV, has been pressured by officials who are displeased with its news coverag...

Mr. DEUTSCH. Mr. Speaker, as Russia prepares for Parliamentary and Presidential elections, there are alarming signals that the Kremlin is cracking down on privately owned news outlets who have been critical of government policies. In particular, I understand that the independent and highly regarded television station, NTV, has been pressured by officials who are displeased with its news coverag...

The diffraction of pulsed beams of light is formulated as an anomalously dispersive phenomenon. In a dispersive material, the effects of material group-velocity dispersion and diffraction on pulsed beam propagation can mutually cancel if the transverse profile of the pulse is suitably chosen.

Mr. DEUTSCH. Mr. Speaker, as Russia prepares for Parliamentary and Presidential elections, there are alarming signals that the Kremlin is cracking down on privately owned news outlets who have been critical of government policies. In particular, I understand that the independent and highly regarded television station, NTV, has been pressured by officials who are displeased with its news coverag...