I found the following equation in an article and I don't understand what the "in" term means. It's not a variable nor a parameter.
The article can be found in http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2980374/#FD4 (equation 15).
Thanks.
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You'll need to link to the article. – goblin GONE Oct 21 '15 at 04:50
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inch? I really have no clue without context. – Zelos Malum Oct 21 '15 at 04:54
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Or at least mention the topic of the article. Does the equation have a name; are any of the terms identified. What are $\sf P_E$, and $\sf V_{A_{Rel}}$ ? Give us something to work with so someone might recognise it. @Alejandro – Graham Kemp Oct 21 '15 at 04:55
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Right. I posted the article. – Alejandro Oct 21 '15 at 04:55
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7Perhaps it is a typo and they meant "ln" for the logarithm – just a wild guess. – Martin R Oct 21 '15 at 04:59
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I can find nothing that defines it. You will probably have to look up the article by Smith and Stamenovic that the paper is pulling this from. – Paul Sinclair Oct 21 '15 at 05:00
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@MartinR - good guess! that is likely the answer - particularly as they are quoting this result from another paper. – Paul Sinclair Oct 21 '15 at 05:01
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2Right. Elastic pressure. It's a typographical error. That curve is a log relation, They meant $\ln$ , the natural log. – Graham Kemp Oct 21 '15 at 05:01
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Looks like typo for $-ln$ – true blue anil Oct 21 '15 at 05:01
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The original article can't be read online. I will test with logarithm. Thanks! – Alejandro Oct 21 '15 at 05:03
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As Martin said in a comment and as was agreed upon by other commenters, the authors almost certainly meant to write "$\ln$". That makes sense, given that they say that the equation is the curve fit of the graph directly above it, which looks like a logarithmic fit if I've ever seen one.
Robert Howard
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