newby-jay

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                           Version 2.0, January 2004
                        http://www.apache.org/licenses/

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      "License" shall mean the terms and conditions for use, reproduction,
      and distribution as defined by Sections 1 through 9 of this document.

newby-jay

Effects of moderate noise on a limit cycle oscillator: Counterrotation and bistability (Phys. Rev. Lett., 2014)

newby-jay

This is an animation representing the Morris-Lecar model of a neuron driven by stochastic ion channels. Ion channels open and close randomly through time, and they are visible while open. The fast sodium channels are colored orange, and the slow potassium channels are colored blue.

newby-jay

<style>
  html, body { margin: 0; padding: 0;}
</style>
<canvas id="canvas"></canvas>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var num = 1e4;
var canvas = document.getElementById("canvas");
var width = canvas.width = 960;
var height = canvas.height = 500;

newby-jay

(function () {
    var canvas = document.getElementById("canvas"),
	width = canvas.width = 960,
	height = canvas.height = 500,
	g = canvas.getContext("2d");
    var	reactionRadius2 = 2,
	alpha = 0.007, // fraction of A molecules made per step
	gamma = alpha/1.5, // fraction of B molecules that decay per step
	randIC = function (i) {
	    return [width*Math.random(), height*Math.random()];

newby-jay

(function anim () {
    var sigma = 0.4,
    dt = 0.05,
    x = -1,
    t = 0,
    nSamples = 1,
    rn = d3.random.normal(0, sigma*Math.sqrt(dt));
    function evolveSimulation() {
        var i = 0;
        while (i++ < 25) {