Dictionary » S » Skew



1. Turned or twisted to one side; situated obliquely; skewed; chiefly used in technical phrases. Skew arch, an oblique arch.

2. (Science: geometry) A ruled surface such that in general two successive generating straight lines do not intersect; a warped surface; as, the helicoid is a skew surface.

3. (Science: mathematics) Skew symmetrical determinant, a determinant in which the elements in each column of the matrix are equal to the elements of the corresponding row of the matrix with the signs changed.

This requires that the numbers in the diagonal from the upper left to lower right corner be zeros. A like determinant in which the numbers in the diagonal are not zeros is a skew determinant, as in (2), above.

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Evolutionary advantage of seeing 'upright'

... imply it's quite a useful trait. All I could think of was that there's some sort of outside property (like gravity for a bad example) that would skew the process of evolution in a display of sort of coincidental bias but then that wouldn't account for the fact our brains seem to have a preferred ...

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by Beany
Thu May 03, 2012 6:22 am
Forum: Evolution
Topic: Evolutionary advantage of seeing 'upright'
Replies: 17
Views: 9320

Re: glass cuvette cleaning

... you measuring? I answered as though you plan to measure bacterial turbidities, for which some trace contamination on the glassware is unlikely to skew the measurement. If you are measuring chemical aggregates which might be flocculated or disrupted by chemicals in the pipet, more rigorous cleaning ...

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by jonmoulton
Tue Mar 06, 2012 4:50 pm
Forum: General Discussion
Topic: glass cuvette cleaning
Replies: 2
Views: 3394

strand biases in mitochondrial genomes

... are in the tail of the sperm which rarely enter the egg. You ask about strand bias- if i understand you correctly, you mean what is termed GC skew - this is very odd terminology - as G always pairs with C with the exception of the temporary induction of mispaired mutations. GC skew means more ...

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by merv
Sun Oct 02, 2011 6:06 pm
Forum: Bioinformatics
Topic: strand biases in mitochondrial genomes
Replies: 4
Views: 6145

Human Bodily Processes

... information from nutrition sites, or dietary sites, or anything of the sort that could be manipulated by theories, opinions, or be slightly off skew...I want strait hard facts that can be proven by science itself! Help me out!

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by gregorybajorek
Fri Jul 16, 2010 10:05 pm
Forum: Human Biology
Topic: Human Bodily Processes
Replies: 2
Views: 3093

Re: Diversifying selection

... The right and left edges are still in the same place. In order to see a change in variation, you need directional selection, which will then skew the standard curve one direction or another.

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by AstusAleator
Sun Jul 12, 2009 5:41 am
Forum: Evolution
Topic: Diversifying selection
Replies: 15
Views: 33081
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