Coupled-oscillator theory of dispersion and Casimir-Polder interactions

2014 ◽  
Vol 141 (16) ◽  
pp. 164105 ◽  
Author(s):  
P. R. Berman ◽  
G. W. Ford ◽  
P. W. Milonni
Keyword(s):  
Coupled Oscillator ◽  
Oscillator Theory

scholarly journals Effects of gap junction inhibition on contraction waves in the murine small intestine in relation to coupled oscillator theory

2015 ◽  
Vol 308 (4) ◽  
pp. G287-G297 ◽  
Author(s):  
Sean P. Parsons ◽  
Jan D. Huizinga
Keyword(s):  
Small Intestine ◽  
Gap Junction ◽  
Interstitial Cells Of Cajal ◽  
Interstitial Cells ◽  
Coupled Oscillator ◽  
Motor Patterns ◽  
Mapping System ◽  
Murine Small Intestine ◽  
Cells Of Cajal ◽  
Oscillator Theory

Waves of contraction in the small intestine correlate with slow waves generated by the myenteric network of interstitial cells of Cajal. Coupled oscillator theory has been used to explain steplike gradients in the frequency (frequency plateaux) of contraction waves along the length of the small intestine. Inhibition of gap junction coupling between oscillators should lead to predictable effects on these plateaux and the wave dislocation (wave drop) phenomena associated with their boundaries. It is these predictions that we wished to test. We used a novel multicamera diameter-mapping system to measure contraction along 25- to 30-cm lengths of murine small intestine. There were typically two to three plateaux per length of intestine. Dislocations could be limited to the wavefronts immediately about the terminated wave, giving the appearance of a three-pronged fork, i.e., a fork dislocation; additionally, localized decreases in velocity developed across a number of wavefronts, ending with the terminated wave, which could appear as a fork, i.e., slip dislocations. The gap junction inhibitor carbenoxolone increased the number of plateaux and dislocations and decreased contraction wave velocity. In some cases, the usual frequency gradient was reversed, with a plateau at a higher frequency than its proximal neighbor; thus fork dislocations were inverted, and the direction of propagation was reversed. Heptanol had no effect on the frequency or velocity of contractions but did reduce their amplitude. To understand intestinal motor patterns, the pacemaker network of the interstitial cells of Cajal is best evaluated as a system of coupled oscillators.

scholarly journals Recent advances in coupled oscillator theory

2019 ◽  
Vol 377 (2160) ◽  
pp. 20190092 ◽  
Author(s):  
Bard Ermentrout ◽  
Youngmin Park ◽  
Dan Wilson
Keyword(s):  
Social Sciences ◽  
Coupled Oscillators ◽  
Weak Coupling ◽  
Standard Theory ◽  
Theme Issue ◽  
Coupled Oscillator ◽  
Dynamical Interaction ◽  
Weakly Coupled ◽  
The Stability ◽  
Oscillator Theory

We review the theory of weakly coupled oscillators for smooth systems. We then examine situations where application of the standard theory falls short and illustrate how it can be extended. Specific examples are given to non-smooth systems with applications to the Izhikevich neuron. We then introduce the idea of isostable reduction to explore behaviours that the weak coupling paradigm cannot explain. In an additional example, we show how bifurcations that change the stability of phase-locked solutions in a pair of identical coupled neurons can be understood using the notion of isostable reduction. This article is part of the theme issue ‘Coupling functions: dynamical interaction mechanisms in the physical, biological and social sciences’.

Absolute configuration of gossypol

1988 ◽  
Vol 53 (11) ◽  
pp. 2664-2666 ◽  
Author(s):  
Liang Huang ◽  
Yi-Kang Si ◽  
Günther Snatzke ◽  
Duo-Kai Zheng ◽  
Jin Zhou
Keyword(s):  
Absolute Configuration ◽  
Coupled Oscillator ◽  
The Absolute ◽  
Oscillator Theory

The absolute configuration of the physiologically active (-)-gossypol has been suggested to be M by application of the coupled oscillator theory to its CD.

The absolute configuration of the orsellinate of armillol; application of the coupled oscillator theory

1984 ◽  
pp. 222-223 ◽  
Author(s):  
Dervilla M. X. Donnelly ◽  
Judith Polonsky ◽  
Thierry Prangé ◽  
Günther Snatzke ◽  
Ulrich Wagner
Keyword(s):  
Absolute Configuration ◽  
Coupled Oscillator ◽  
The Absolute ◽  
Oscillator Theory

Synchronization Phenomena Observed in Coupled Oscillator with Interrupted Characteristics

2009 ◽  
Vol 129 (7) ◽  
pp. 1444-1450
Author(s):  
Shingo Tomonaga ◽  
Hiroyuki Kitajima ◽  
Takuji Kousaka
Keyword(s):  
Coupled Oscillator

scholarly journals Time delay effect in a three coupled oscillator system of the physarum plasmodium

2000 ◽  
Vol 40 (supplement) ◽  
pp. S100
Author(s):  
A. Takamatsu ◽  
T. Fujii ◽  
I. Endo
Keyword(s):  
Time Delay ◽  
Delay Effect ◽  
Coupled Oscillator ◽  
Oscillator System ◽  
Time Delay Effect
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