Abnormalities of the lower oesophageal sphincter may facilitate excessive reflux of gastric contents including acid and sometimes bile from the stomach into the oesophagus. Bile is particularly caustic and reflux of duodenal contents is more troublesome than reflux of gastric contents alone. There is little correlation between severity of symptoms and findings on endoscopy. Sometimes drugs that...

The purpose of this study was to determine the effects of video-game experience and flight-stick position on flying performance. The study divided participants into 2 groups; center- and side-stick groups, which were further divided into high and low level of video-game experience subgroups. The experiment consisted of 7 sessions of simulated flying, and in the last session, the flight stick co...

The stick index of a knot is the least number of line segments required to build the knot in space. We define two analogous 2-dimensional invariants, the planar stick index and the spherical stick index. We find bounds on these quantities in terms of other knot invariants, and give planar stick and spherical stick constructions for torus knots and for compositions of trefoils.

In the last decade, dramatic changes in lacrosse stick design are believed to be associated with changes in the play of the game; however, there is a limited understanding of how the lacrosse stick propels the ball. We predicted that the lacrosse stick would perform as a passive extension of the player's hand and hypothesized that ball shot speed would be equal to the speed at the tip of the st...

This article describes the use of a newly invented compound stick gun to take impressions for complete denture. The border molding process involves loading the modeling compound in an electric heating device and applying an even thickness of compound on the flange of a custom tray at a proper temperature without hot water tempering. This method provides a quicker and easier border molding proce...

background : accidental needle-stick injuries (nsis) are a hazard for health-care workers and general public health. nursing workers are at high risk for occupational exposure to blood-borne pathogens (such as hbv, hcv and hiv) via sharp injuries of needle stick. methods : this descriptive analytical cross-sectional study was done on 158 nursing workers of khanevadeh hospital in tehran to study...

The peculiarities of nanocapillary flows are studied in the framework Newtonian and micropolar fluid models. classical problem a steady flow driven by constant pressure gradient is formulated for cylindrical with radius much smaller than its length. All possible boundary conditions (slip, no-slip, stick-slip) exploited model fluid, two alternative value problems (hyper-stick no-slip nonzero spi...

We investigated the acquisition of skill in balancing a stick (52 cm, 34 g) on the fingertip in nine participants using three-dimensional motion analysis. After 3.5 h of practice over 6 wk, the participants could more consistently balance the stick for longer durations with greatly reduced magnitude and speed of stick and finger movements. Irrespective of level of skill, the balanced stick beha...