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<h1> Hockey-Stick kinetics </h1>
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<div class="span8">
<h2>Usage</h2>
<pre><div>HS.solution(t, parent.0, k1, k2, tb)</div></pre>
<h2>Arguments</h2>
<dl>
<dt>t</dt>
<dd> Time. </dd>
<dt>parent.0</dt>
<dd> Starting value for the response variable at time zero. </dd>
<dt>k1</dt>
<dd> First kinetic constant. </dd>
<dt>k2</dt>
<dd> Second kinetic constant. </dd>
<dt>tb</dt>
<dd> Break point. Before this time, exponential decline according
to <code>k1</code> is calculated, after this time, exponential decline proceeds
according to <code>k2</code>. </dd>
</dl>
<div class="Description">
<h2>Description</h2>
<p>Function describing two exponential decline functions with a break point
between them.</p>
</div>
<div class="Value">
<h2>Value</h2>
<p><dl>
The value of the response variable at time <code>t</code>.
</dl></p>
</div>
<div class="References">
<h2>References</h2>
<p>FOCUS (2006) “Guidance Document on Estimating Persistence and
Degradation Kinetics from Environmental Fate Studies on Pesticides in EU
Registration” Report of the FOCUS Work Group on Degradation Kinetics,
EC Document Reference Sanco/10058/2005 version 2.0, 434 pp,
<a href = 'http://focus.jrc.ec.europa.eu/dk'>http://focus.jrc.ec.europa.eu/dk</a></p>
</div>
<h2 id="examples">Examples</h2>
<pre class="examples"><div class='input'> plot(function(x) HS.solution(x, 100, 2, 0.3, 0.5), 0, 2, ylim=c(0,100))
</div>
<p><img src='HS.solution-2.png' alt='' width='540' height='400' /></p></pre>
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