Null Value

Known as: None, Null 
A special value that may be stored in some database columns to represent an unknown, missing, not applicable, or undefined value.(from Free On-Line… (More)
National Institutes of Health

Papers overview

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Review
2017
Review
2017
Recently there has been a growing concern that many published research findings do not hold up in attempts to replicate them. We… (More)
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Review
2016
Review
2016
In multivariate pattern analysis of neuroimaging data, 'second-level' inference is often performed by entering classification… (More)
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Highly Cited
2007
Highly Cited
2007
Microsatellite null alleles are commonly encountered in population genetics studies, yet little is known about their impact on… (More)
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Highly Cited
2002
Highly Cited
2002
We propose a test of the null hypothesis that an observable series is stationary around a deterministic trend. The series is… (More)
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Highly Cited
1998
Highly Cited
1998
Mutations of the gene Lps selectively impede lipopolysaccharide (LPS) signal transduction in C3H/HeJ and C57BL/10ScCr mice… (More)
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Highly Cited
1997
Highly Cited
1997
The transforming growth factor-β (TGF-β) superfamily encompasses a large group of growth and differentiation factors playing… (More)
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Highly Cited
1996
Highly Cited
1996
ANGIOGENESIS is required for a wide variety of physiological and pathological processes1. The endothelial cell-specific mitogen… (More)
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Highly Cited
1993
Highly Cited
1993
lin-4 is essential for the normal temporal control of diverse postembryonic developmental events in C. elegans. lin-4 acts by… (More)
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Highly Cited
1992
Highly Cited
1992
Mutations in the p53 tumour-suppressor gene are the most frequently observed genetic lesions in human cancers. To investigate the… (More)
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Highly Cited
1975
Highly Cited
1975
This paper describes the concept of adaptive noise cancelling, an alternative method of estimating signals corrupted by additive… (More)
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