Different flow patterns of downward gas-liquid two-phaseflow using simple mixer are studied in an experimental manner. An experimental setup is designed and fabricated to allow the visual observation of downward two-phase flow patterns and their transitions. The flow patterns are recorded by a 1200 frames per second high speed video camera. The quality of downward two-phase flow patterns photos...

the quantitative analysis of cardiac motions in echocardiography images is a noteworthy issue in processing of these images. cardiac motions can be estimated by optical flow (of) computation in different regions of image which is based on the assumption that the intensity of a moving pattern remains constant in consecutive frames. however, in echocardiographic sequences this assumption may be v...

objective: the aim of the present study was to evaluate unstimulated salivary flow rate and oral symptoms in menopausal women. materials and methods: a total of 200 individuals including 100 women in their menopause (case group) and 100 men in the same age range (control group) participated in this analytic descriptive investigation. none of the patients were being treated for any systemic dise...

the mechanisms underlying cerebral vasodilatation during hypercapnia are not fully understood. to examine the role of nerves and prostaglandins in the regulation of basal blood flow and in hypercapnia-induced vasodilatation in the cerebral blood vessels of rabbit. cerebral blood flow was measured by laser doppler flow-meter in 18 nzw rabbits anesthetized with sodium pentobarbital.  tetrodetoxin...