OBJECTIVE To compare the outcome of a modified onlay island flap (MOIF) with that of the Mathieu urethroplasty for distal hypospadias repair. PATIENTS AND METHODS In a prospective randomised study, 60 patients with coronal, subcoronal and distal penile hypospadias, with a urethral plate width of ⩽6 mm, and minimal or no chordee, underwent either MOIF using a midline longitudinal outer preputi...

Copyright © 2011 S. Karger AG, Basel Fax +41 61 306 12 34 E-Mail [email protected] www.karger.com © 2011 S. Karger AG, Basel 1015–9770/11/0054–0169$26.00/0 Accessible online at: www.karger.com/cur Hypospadias • Uroflowmetry • Snodgrass urethroplasty • Mathieu urethroplasty Background: To assess two different operative techniques in hypospadias with special emphasis on urinary flow with the help ...

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In this paper we investigate numerically the spectrum of some representative examples of discrete one-dimensional Schrödinger operators with quasi-periodic potential in terms of a perturbative constant b and the spectral parameter a. Our examples include the well-known Almost Mathieu model, other trigonometric potentials with a single quasi-periodic frequency and generalisations with two and th...

Asymptotic stability of finite-dimensional linear continuous-time periodic (FDLCP) systems is studied by the harmonic analysis. It is first shown that stability can be examined with what we call the harmonic Lyapunov equation. Another necessary and sufficient stability criterion is developed via this generalized Lyapunov equation, which reduces the stability test into that of an approximate FDL...

Standard methods of nonlinear dynamics are used to investigate the stability of particles, branes and D-branes of abelian Born–Infeld theory. In particular the equation of small fluctuations about the D–brane is derived and converted into a modified Mathieu equation and – complementing earlier low–energy investigations in the case of the dilaton–axion system – studied in the high–energy domain....

Hill's one-dimensional three-element model has often been used for formulating a three-dimensional skeletal muscle constitutive model, which generally involves several material parameters. However, only few of these parameters have physical meanings and can be experimentally determined. In this paper, a parametric study of a Hill-type hyperelastic skeletal muscle model is performed. First, the ...