We add the effect of turbulent viscosity via the α−prescription to models of the self-consistent formation and evolution of protostellar discs. Our models are nonaxisymmetric and carried out using the thin-disc approximation. Self-gravity plays an important role in the early evolution of a disc, and the later evolution is determined by the relative importance of gravitational and viscous torque...

Abstract Eggleston (Approximation to plane convex curves. I. Dowker-type theorems. Proc. Lond. Math. Soc. 7 , 351–377 (1957)) proved that in the Euclidean best approximating n -gon a disc K is always inscribed if we measure distance by perimeter deviation. We prove analogue of Eggleston’s statement holds hyperbolic plane, and give an example showing it fails on sphere.

OBJECTIVE To assess the frequency of phenotypic expression of inducible resistance of clindamycin due to expression of erm genes, in clinical isolates of Staphylococcus aureus (S. aureus), by double disk diffusion test (D-test). METHOD This was a cross sectional study conducted in the clinical laboratory of Aga Khan University Hospital, Karachi. A total of 2432, non duplicate clinical isolate...

In this paper we derive several quasi steady-state approximations (QSSAs) to the stochastic reaction network describing the Michaelis-Menten enzyme kinetics. We show how the different assumptions about chemical species abundance and reaction rates lead to the standard QSSA (sQSSA), the total QSSA (tQSSA), and the reverse QSSA (rQSSA) approximations. These three QSSAs have been widely studied in...

BACKGROUND AmpC type β-lactamases are commonly isolated from extended-spectrum Cephalosporin-resistant Gram-negative bacteria. Also, resistance appeared in bacterial species not naturally producing AmpC enzymes. Therefore, a standard test for the detection of the plasmid-mediated AmpC enzyme and new breakpoints for extended spectrum Cephalosporins are urgently necessary. OBJECTIVES To detect ...

[Purpose] The present study investigated the effects of wearing germanium-coated functional clothing on tympanic temperature, thermal sensation, heat shock protein 70 (Hsp70), and lactate during endurance exercise. [Subjects and Methods] Nine healthy and untrained male subjects were enrolled. Subjects ran for 60 min on a treadmill (75% heart rate reserve) in the following 2 tests: 1) control te...

Fastidious organisms present problems in antimicrobial susceptibility testing related to particular cultural requirements or slow growth. Methods for commonly isolated fastidious organisms, including haemolytic streptococci, Neisseria spp. and Haemophilus spp., are included in the description of the standardized disc diffusion method. However, some further information is given here for Haemophi...

The article presents the results of research a railway disc brake in evaluation weight wear friction pads. tests were carried out on certified stand where and mechanical characteristics are determined. was additionally equipped with thermal imaging camera to observe contact pads disc. Attention also paid examining influence such parameters braking process as surface pad disc, thickness determin...