Results 31 to 40 of about 45,774 (276)
PLoS ONE, 2014 BackgroundPeriostin was proved to play an important role in extra-cellular matrix remodeling after acute myocardial infarction (AMI). Myocardial periostin was markedly up-regulated after AMI and participated in the maladaptive process of cardiac ...
Lin Ling +3 more
doaj +1 more source
The Investigation of the Impact of the Social Capital Aspects on the Performance of Agricultural and Industrial Cooperatives in Boyer-Ahmad County [PDF]
جامعه شناسی کاربردی, 2017 Introduction Making over tenets and assessments of cooperation and its functions,the mutual relationship between development of cooperativesand various forms of assetsis understood.
Asghar Mirfardi +2 more
doaj +1 more source
On Total Positivity of the Discrete Spline Collocation Matrix
Journal of Approximation Theory, 1996 \textit{R. Q. Jia} [J. Approximation Theory 39, 11-23 (1983; Zbl 0515.41010)] proved that the discrete B-spine collocation matrix is totally positive, and he also gave necessary and sufficient conditions for a minor to be strictly positive. By a counterexample, it is shown in this paper that Jia's necessary and sufficient conditions are not quite ...
openaire +1 more source
Tropical totally positive matrices
, 2018 arXiv:1606.00238International audienceWe investigate the tropical analogues of totally positive and totally nonnegative matrices. These arise when considering the images by the nonarchimedean valuation of the corresponding classes of matrices over a real
Niv, Adi, Gaubert, Stéphane
core +1 more source
Eigenvalue Localization for Symmetric Positive Toeplitz Matrices
AxiomsGiven a real symmetric matrix, several inclusion and exclusion intervals containing its eigenvalues can be given. In this paper, for symmetric positive Toeplitz matrices, we provide an inclusion interval and, under an additional hypothesis, we also give ...
Juan M. Peña
doaj +1 more source
Generalized totally positive matrices
, 2000 We say that a rectangular matrix over a (in general, noncommutative) ring with identity having a positive part is generalized totally positive (GTP) if in all nested sequences of so-called relevant submatrices, the Schur complements are positive. Here, a
Miroslav Fiedler +3 more
core +1 more source
Totally nonpositive completions on partial matrices [PDF]
, 2006 An n £ n real matrix is said to be totally no positive if every minor is no positive. In this paper, we are interested in totally no positive completion problems, that is, does A partial totally no positive matrix have a totally no positive matrix ...
Araújo, C. Mendes +2 more
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Possible spectra of totally positive matrices
, 1984 For any given set S of n distinct positive numbers, we construct a symmetric n-by-n (strictly) totally positive matrix whose spectrum is S. Thus, in order to be the spectrum of an n-by-n totally positive matrix, it is necessary and sufficient that n ...
Johnson, Charles R., Barrett, Wayne W.
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Tau acetylation at K331 has limited impact on tau pathology in vivo
FEBS Letters, EarlyView.We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto +3 more
wiley +1 more source
FEBS Letters, EarlyView.The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson +6 more
wiley +1 more source