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Sturm-Liouville eigenproblems with an interior double pole
ZAMP Zeitschrift f�r angewandte Mathematik und Physik, 1995The paper concerns the selfadjoint Sturm-Liouville eigenproblem \(w''(x)+ p(x) w(x)= 0\), on \([a, b]\), \(w(a)= w(b)= 0\), where the function \(p\) has a double pole and two simple turning points. By using the asymptotic behaviour of Whittaker functions the asymptotic approximation for high order modes is obtained.
Acho, Thomas M., Clemence, Dominic P.
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Periodic poling and waveguide frequency doubling in RbTiOAsO4
Applied Physics Letters, 1996We report the demonstration of a guided-wave nonlinear process in the material rubidium titanyl arsenate (RTA). Quasi-phase-matched frequency doubling of 874.5 nm light was achieved in a Cs:RTA waveguide, with a normalized conversion efficiency of 225%/W cm2. We also report phase matching characteristics for bulk periodically poled RTA.
W. P. Risk, G. M. Loiacono
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Frequency doubling and sensing using poled fiber
35th Australian Conference on Optical Fibre Technology, 2010Applications of poling induced second-order nonlinearity in silica optical fibres for electro-optic switching have been limited. Recent developments show good prospects for applications in frequency doubling and sensing.
S. Fleming +3 more
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The Fourfold: The Double Poles of the Poetic Projection
2018The poetic projection differentiates, in Heidegger’s view, not first in the categories of traditional logic, but in the ‘twofold’ of the ontological difference; secondly, in the three dimensions of time–space; and thirdly, in the ontological basic structure of the world, which Heidegger calls the ‘fourfold’.
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Double poles of theS-matrix in a two-channel model
Journal of Physics A: Mathematical and General, 1997Summary: The poles of the \(S\)-matrix for a two-channel model with square well potentials are calculated. It is found that the trajectories of these poles in the complex \(k\)-plane for varying coupling strength show avoided crossings. At the critical parameters the poles coincide to form a double pole.
Vanroose, W. +3 more
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Remarks on double poles and non-exponential decays
Czechoslovak Journal of Physics, 1969The model of an unstable particle with two internal states, which are able to change from one into the other, is analyzed with the help of the formalism outlined generally in the papers by J. Jersak: Jader fiz. (in press) and M. Lokajicek: Czech. J. Phys.B 19 (1969), 925. This formalism is developed further.
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Quadrature formula for a double-pole singular integral
AIAA Journal, 1988Stark's quadrature formula for cauchy integrals has been extended in a simple manner to evaluate double-pole singular integrals which occur in linear airfoil and wing theory.13;
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POLING FORCES CHANGE WITH POLE LENGTH DURING MAXIMAL DOUBLE POLING IN CROSS-COUNTRY SKIING
Medicine & Science in Sports & Exercise, 2002J Nilsson +4 more
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