PURPOSE To determine whether prior instillation of amethocaine would increase the rate and magnitude of tropicamide-induced pupillary dilatation in darkly pigmented irides. METHOD A total of 50 healthy Africans aged 18-40 years, with darkly pigmented irides, received a drop of amethocaine in one eye and a drop of placebo in the contralateral eye, followed by two drops of tropicamide in both e...

The pressure drop of refrigerant R-134a flow boiling inside a horizontal tube has been investigated experimentally. The test set-up which was used in this investigation is a well instrumented vapor compression refrigeration system. These instruments are thermocouples, flow meter, pressure gauges and the pressure drop measuring apparatus. This system consisted of three electrically heated evapor...

Multiphase flows are commonly encountered in oil and gas industries. The transport of multiphase flow causes the formation of slug, the increase of pressure drop and the possibility of phase changes therefore, a set of simulation runs was performed to predict flow regimes in a horizontal pipeline, and the results were compared with the Baker chart. The effects of small downward inclinations of ...

abstract the saturated hydraulic conductivity (ks) is an important physical property of soil. the direct measurement of this property in soils is a difficult and time consuming process. pedotransfer functions (ptfs) provide an alternative by estimating soil parameters from more readily available soil data. the objective of this study is to determine effective factors on soil hydraulic conductiv...

It is important to study the characteristics of nozzle deluge spray comply with standards developed by petroleum industry for offshore installations in Norway. Due stochastic nature decomposition processes and geometrical features within nozzle, has a complex flow field. Since field determines performance spray, present performs an experimental characterization medium velocity validation comput...

An accurate prediction of the interphase behaviors vertical gas-liquid subcooled boiling flow is meaningful for first loop a nuclear power plant (NPP). Therefore, including bubble size distribution in NPP are analyzed, evaluated, and validated using various wall models coupled with population balance model (PBM) kernels this paper. Firstly, nondimensional numbers DEBORA (Development Borehole Se...

State-of-the-art axisymmetric drop shape analysis (ADSA) techniques for the computation of interfacial tensions and contact angles by fitting the Laplace equation of capillarity to the shape and dimensions of pendant and sessile drops are presented. More accurate, efficient, and reliable versions of the technique for the measurement of contact angles from the volume and diameter of sessile drop...