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
Detecting and avoiding likely false-positive findings - a practical guide.
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
Valid population inference for information-based imaging: From the second-level <ce:italic>t</ce:italic>-test to prevalence inference
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 and estimation of population differentiation.
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
Testing the null hypothesis of stationarity against the alternative of a unit root
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
Defective LPS signaling in C3H/HeJ and C57BL/10ScCr mice: mutations in Tlr4 gene.
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
Regulation of skeletal muscle mass in mice by a new TGF-p superfamily member
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
Heterozygous embryonic lethality induced by targeted inactivation of the VEGF gene
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
The C. elegans heterochronic gene lin-4 encodes small RNAs with antisense complementarity to lin-14.
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
Mice deficient for p53 are developmentally normal but susceptible to spontaneous tumours
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
Adaptive noise cancelling: Principles and applications
This paper describes the concept of adaptive noise cancelling, an alternative method of estimating signals corrupted by additive… (More)
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