Results 81 to 90 of about 27,057,635 (304)
On regular splittings of an M-matrix
Linear Algebra and its Applications, 1989 Some results on regular splittings of M-matrices are proved. The study is motivated by a recent work of \textit{H. Schneider} [ibid. 58, 407-424 (1984; Zbl 0561.65020)]. It is shown, first, that if A is a nonsingular M-matrix and \(A=M-N\) is a regular splitting then this splitting is a graph compatible one, and if A is just an M-matrix but \(A=M-N ...
openaire +2 more sources
Ligand‐dependent transcriptional heterogeneity in cell cycle gene expression delays G1/S entry
FEBS Letters, EarlyView.EGF and HRG induce distinct G1/S progression programs in ErbB2‐amplified BT474 breast cancer cells. Despite activating the potent ErbB2–ErbB3 heterodimer, HRG does not accelerate cell‐cycle entry. Instead, EGF promotes earlier restriction‐point passage via ERK–FOS signaling, whereas HRG activates the AKT–MYC axis, driving transcriptional heterogeneity ...
Ririn Rahmala Febri +5 more
wiley +1 more source
Emerging experimental and computational methods for studying redox‐regulated structural transitions
FEBS Letters, EarlyView.Redox reactions can reshape proteins and alter how they behave in cells, with important consequences for health and disease. This review explores emerging experimental and computational approaches for discovering these redox‐sensitive protein switches, revealing their structural effects, and predicting their behavior, opening new opportunities to ...
Tasneem Rass +2 more
wiley +1 more source
Innate immune responses induced by the saponin adjuvant Matrix-M in specific pathogen free pigs
Veterinary Research, 2017 Saponin-based adjuvants have been widely used to enhance humoral and cellular immune responses in many species, but their mode of action is not fully understood.
Viktor Ahlberg +5 more
doaj +1 more source
Linear Algebra and its Applications, 1977 AbstractOne aspect of the inverse M-matrix problem can be posed as follows. Given a positive n × n matrix A=(aij) which has been scaled to have unit diagonal elements and off-diagonal elements which satisfy 0 < y ⩽ aij ⩽ x < 1, what additional element conditions will guarantee that the inverse of A exists and is an M-matrix?
openaire +2 more sources
Sign determinacy of M-matrix minors
Linear Algebra and its Applications, 1987 Let A be a (singular or non-singular) M-matrix, and let G(A) denote its undirected graph. The main result is that if the longest simple cycle of G(A) has length not exceeding 3 then the sign of any minor of A depends only on G(A) and not on the magnitude of the entries of A.
Johnson, Charles R. +3 more
openaire +2 more sources
Metastatic niche shaped by host factors influences disseminated cancer cell fate
FEBS Letters, EarlyView.Metastasis is shaped not only by cancer cells but also by the environments they encounter. This review explores how factors such as aging, diet, the microbiome, lifestyle, and environmental exposures remodel organ‐specific niches in the lung, liver, bone, and brain, influencing where metastatic cells survive, remain dormant, or grow, and ultimately ...
Gwennan Delyth Ward +2 more
wiley +1 more source
In this note we consider the question under which conditions all entries of the matrix I-(I+X)-1 are nonnegative in case matrix X is a real positive definite matrix.Sufficient conditions are presented as well as some necessary conditions.One sufficient ...
Engwerda, J.C.
core
A Columnwise Update Algorithm for Sparse Stochastic Matrix Factorization
, 2022 Nonnegative matrix factorization arises widely in machine learning and data analysis. In this paper, for a given factorization of rank r, we consider the sparse stochastic matrix factorization (SSMF) of decomposing a prescribed m-by-n stochastic matrix V
Ching, W, Bai, Z, Xiao, G
core +1 more source
Precipitation of M23C6 Secondary Carbide Particles in Fe-Cr-Mn-C Alloy during Heat Treatment Process
Metals, 2020 The initial as-cast microstructure of high-chromium white cast iron (2.08% C, 12.1% Cr), including austenitic dendrites in a matrix of a eutectic mixture of austenite and M7C3 carbides.
Nguyen Thi Hoang Oanh +1 more
doaj +1 more source