Results 111 to 120 of about 6,151,667 (279)

Different parts of the mussel Gigantidas haimaensis holobiont responded differently to deep‐sea sampling stress

open access: yesIntegrative Zoology, EarlyView.
Symbiotic gill and nonsymbiotic mantle of mussel Gigantidas haimaensis responded differently to deep‐sea sampling stress caused by acute environmental changes. Sharply increased transcription factors potentially play key roles in initiating the response of sampled deep‐sea macrobenthos to the sampling stress.
Guoyong YAN   +4 more
wiley   +1 more source

The rarity of mutations and the inflation of bacterial effective population sizes

open access: yesMethods in Ecology and Evolution, Volume 16, Issue 4, Page 722-732, April 2025.
Abstract Mutations are fundamental for evolution, and their mathematical modelling in population genetics heavily relies on our perception of their frequency and the timescale over which they occur. A common assumption is that mutations are infrequent, so when a new mutation arises, the previous one has either become fixed or lost.
Rui Borges
wiley   +1 more source

An improved bound for negative binomial approximation with -functions

open access: yesAKCE International Journal of Graphs and Combinatorics, 2017
In this article, we use Stein’s method together with -functions to give an improved bound for the total variation distance between the distribution of a non-negative integer-valued random variable and the negative binomial distribution with parameters ...
K. Teerapabolarn
doaj   +1 more source

Similarities and differences in the gene expression signatures of physiological age versus future lifespan

open access: yesAging Cell, Volume 24, Issue 4, April 2025.
The source of variability in lifespan among genetically identical Caenorhabditis elegans is a mystery. We used biomarkers of aging to isolate prospectively long‐lived and short‐lived individuals from the same population. We then used transcriptomic approaches to characterize these long‐ and short‐lived sub‐populations against the average physiological ...
Matthew C. Mosley   +6 more
wiley   +1 more source

Beta-hypergeometric distributions and random continued fractions

open access: yesStatistics & Probability Letters, 2008
In this paper an enlargement of the beta family of distributions on (0, 1) is presented. Distributions in this class are characterized as being the laws of certain random continued fractions associated with products of independent random matrices of order 2 whose entries are either constant or beta distributed. The result can be proved by a famous 1879
ASCI, CLAUDIO   +2 more
openaire   +4 more sources

Phenotypic upregulation of hexocylceramides and ether‐linked phosphocholines as markers of human extreme longevity

open access: yesAging Cell, Volume 24, Issue 4, April 2025.
Mass spectrometry analysis of 569 lipid species showed that ceramide‐to‐hexosylceramide conversion and the preservation of ether‐linked PC levels are key phenotypic traits ensuring extreme longevity. This lipidomic signature is shaped by an intrinsic adaptive program that maintains protective mechanisms and cellular identity.
Anna Fernàndez‐Bernal   +10 more
wiley   +1 more source

Multilevel Fixed and Sequential Acceptance Sampling: The R Package MFSAS

open access: yesJournal of Statistical Software, 2011
Multilevel acceptance sampling for attributes is used to decide whether a lot from an incoming shipment or outgoing production is accepted or rejected when the product has multiple levels of product quality or multiple types of (mutually exclusive ...
Aaron Childs, Yalin Chen
doaj  

Distribution of LRC for testing sphericity of a complex multivariate Gaussian model

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1985
In this paper, exact null distribution of the likelihood ratio criterion for testing sphericity structure in a complex multivariate normal covariance matrix is obtained in computable series form.
D. K. Nagar, S. K. Jain, A. K. Gupta
doaj   +1 more source

HyperQuick algorithm for discrete hypergeometric distribution

open access: yesJournal of Discrete Algorithms, 2007
AbstractBased on the binomial identity∑k=0x(Mk)(N−Mn−k)=∑m=MN−n+x(mx)(N−1−mN−m−n+x) we present an algorithm for computing the cumulative distribution function of a random variable with discrete hypergeometric distribution. For any accuracy ϵ⩾0 the required number of computational cycles is less then N−n, where N is the size of the population and n is ...
openaire   +2 more sources

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