dilatation

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dilatation

[‚dil·ə′tā·shən]
(physics)
The increase in volume per unit volume of any continuous substance, caused by deformation.
References in periodicals archive ?
Laryngeal mask airway or endotracheal tube for percutaneous dilatational tracheostomy: a comparison of visibility of intratracheal structures.
Early percutaneous dilatational tracheostomy leads to improved outcomes in critically ill medical patients as compared to delayed tracheostomy.
In addition, the displacement, dilatational, rotational and strain inhomogeneous wave equations need further investigation.
Bodenham, "Portable ultrasonic scanning of the anterior neck before percutaneous dilatational tracheostomy," Anaesthesia, vol.
Comparison of open versus bedside percutaneous dilatational tracheostomy in the cardiothoracic surgical patient: Outcomes and financial analysis.
The results support the hypothesis that TOF measurement in standing trees is likely dominated by dilatational or quasi-dilatational waves rather than one-dimensional plane waves as in the case of logs.
Acupuncture was performed using the following instruments and parameters: needle: 0.25 mm in diameter x 25 mm in length Huatuo stainless steel filiform needle (Suzhou Medical Supplies Co., Ltd., China) and HAN's Acupoint Nerve Stimulator (Nanjing Jisheng Medical Treatment Technology Co., Ltd., China): 2/15 Hz dilatational wave of frequency with automatically shifting between 2 Hz and 15 Hz stimulation for 3 s each, with current intensity 2 [+ or -] 1 mA (causing slight vibration of muscles around acupoints and keeping quiet), lasting for 30 min, once in the morning, five times every week, with break at weekend, and the treatment continued for 4 weeks.
Its components on the main diagonal: [[epsilon].sub.11] = [partial derivative][u.sub.x]/[partial derivative]x, [[epilon].sub.22] = [partial derivative][u.sub.y]/[partial derivative]y are interpreted as strains in the axis of the accepted system of coordinates, and the components beyond axis [[epsilon].sub.12] = [[epsilon].sub.21] = [1/2] are interpreted as dilatational strains.
3 represent the deviatoric and dilatational response of the viscoelastic material with respect to the elapsed time (t - [tau]).
Solutions of elastic state due to a spherical or ellipsoidal inclusion containing pure dilatational eigenstrains have been obtained by Mindlin and Cheng [4] and by Seo and Mura [5], respectively, through integration of Green's functions of a point force acting in the interior of a semi-infinite solid [6].
The rotational part corresponds to a dilatational or compressional wave and the irrotational part corresponds to a shearing wave.