Geometrically nonlinear analysis of thin circular plates on Winkler elastic foundations has been studied in this paper. The nonlinear partial differential equations obtained from von Karman’s large deflection plate theory have been solved by using the discrete singular convolution (DSC) in the space domain and the harmonic differential quadrature (HDQ) method in the time domain.

Dynamics of a chain of interacting parity-time-invariant nonlinear dimers is investigated. A dimer is built as a pair of coupled elements with equal gain and loss. A relation between stationary soliton solutions of the model and solitons of the discrete nonlinear Schrödinger (DNLS) equation is demonstrated. Approximate solutions for solitons whose width is large in comparison to the lattice spa...

The traditional definition of a confidence interval requires the coverage probability at any value of the parameter to be at least the nominal confidence level. In constructing such intervals for parameters in discrete distributions, less conservative behavior results from inverting a single two-sided test than inverting two separate one-sided tests of half the nominal level each. We illustrate...

WATHEN the physician encounters a patient in whom the clinical examination, the electrocardiogram, and roentgenograms indicate the presence of combined aortic stenosis and regurgitation, he will usually attribute these findings to an aortic valve that has been rendered both stenotic and regurgitant by rheumatic valvulitis and its sequelae. Indeed, in the vast majority of patients, this clinicop...

structive hypertrophic cardiomyopathy. J Clin Invest 66: 1369, 1980 30. Stefadouros MA, Canedo MI, Karayannis E, Abdulla A, Frank MJ: Internally recorded systolic time intervals in hypertrophic subaortic stenosis. Am J Cardiol 40: 700, 1977 31. Nesje OA, Enge I: External carotid pulse recordings in hypertrophic obstructive cardiomyopathy. Acta Med Scand 202: 197, 1977 32. Henry WL, Clark CE, Gr...

We herein report a rare case of subaortic stenosis in association with a previous tetralogy of Fallot (TOF) surgical repair, which was not taken into account as a differential diagnosis. Echocardiography plays a pivotal role in identification of this rare combination. Therefore, echocardiography should be performed periodically during follow-up of patients with surgically corrected TOF. Given t...

OBSTRUCTION to left ventricular outflow has been considered a characteristic and functionally important feature of "hypertrophic subaortic stenosis." The presence of obstruction has been inferred from the finding of a pressure gradient within the left ventricle during catheterization of the left heart in certain patients with idiopathic left ventricular hypertrophy. Indeed, the disease was not ...

The clinical and morphologic features of tunnel subaortic stenosis, an unusual form of obstruction to left ventricular outflow, are described in 11 patients. Although patients with tunnel subaortic stenosis demonstrate a variety of cardiovascular malformations, the most characteristic anatomic feature is fibromuscular tubular narrowing of the outflow tract that remains relatively unchanged duri...

structive hypertrophic cardiomyopathy. J Clin Invest 66: 1369, 1980 30. Stefadouros MA, Canedo MI, Karayannis E, Abdulla A, Frank MJ: Internally recorded systolic time intervals in hypertrophic subaortic stenosis. Am J Cardiol 40: 700, 1977 31. Nesje OA, Enge I: External carotid pulse recordings in hypertrophic obstructive cardiomyopathy. Acta Med Scand 202: 197, 1977 32. Henry WL, Clark CE, Gr...