Results 41 to 50 of about 1,177 (152)
Reduction of a pair of matrices to a special triangular form over a ring of almost stable range 1 (in Ukrainian) [PDF]
Математичні Студії, 2012 In the paper it is considered a notion of a ring of almost stable range 1. It is shown that an arbitrary pair of matrices over commutative Bezout domain of almost stable range 1, where at least one of the matrices is not a zero divisor, reduced to a ...
S. I. Bilavska, I. S. Vasyunyk
doaj
A Novel Two‐Stage Flexible Flow Shop Batch Scheduling Model for Grinding Workshops
Naval Research Logistics (NRL), EarlyView.ABSTRACT The growing need for data storage in data centers has increased the demand for mechanical hard disks due to their low cost and high reliability. Aluminum substrates are the most popular base plates for mechanical hard disks because of their high hardness and low cost.
Jun Xu +4 more
wiley +1 more source
Rapid Communications in Mass Spectrometry, EarlyView.ABSTRACT Rationale Ions trapped within a Penning cell (ICR) travel periodic orbits whose frequencies are dependent on their mass‐to‐charge ratio and the value of the magnetic field passing through the trap. Fourier transformation (FT‐ICR) decomposes the signal induced in the detection circuit by the rotation of the ions in the cell after the ...
Patrick Arpino, Michel Heninger
wiley +1 more source
On characterizing potential friends of 20
Annals of the West University of Timisoara: Mathematics and Computer ScienceDoes 20 have a friend? Or is it a solitary number? A folklore conjecture asserts that 20 has no friends, i.e., it is a solitary number. In this article, we prove that a friend N of 20 is of the form N = 2 · 52a ·m2, with (3;m) = (7;m) = 1 and it has at ...
Chatterjee Tapas +2 more
doaj +1 more source
Reconstructing Long‐Term Historical Hydrologic Alteration to Support Environmental Flows in Texas
River Research and Applications, EarlyView.ABSTRACT Understanding and quantifying hydrologic alteration is essential for effective watershed management and ecological conservation. This study developed a modeling framework to predict reference hydrology and assess and model hydrologic alteration across Texas using publicly available geospatial datasets.
Mark B. Lueders +5 more
wiley +1 more source
Structural Concrete, EarlyView.Abstract This paper presents a regression‐based methodology to estimate the Torsional Stiffness Reduction Factor (TSRF) of reinforced concrete beams under combined torsion and shear. A numerical database of 6816 samples was generated using the Combined Action Softened Truss Model (CA‐STM) implemented in Python, considering design guidelines prescribed ...
Khrys K. S. Medeiros +2 more
wiley +1 more source
The k-Zero-Divisor Hypergraph of a Commutative Ring
International Journal of Mathematics and Mathematical Sciences, 2007 The concept of the zero-divisor graph of a commutative ring has been studied by many authors, and the k-zero-divisor hypergraph of a commutative ring is a nice abstraction of this concept.
Ch. Eslahchi, A. M. Rahimi
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Prime divisors of some shifted products
International Journal of Mathematics and Mathematical Sciences, 2005 We study prime divisors of various sequences of positive integers A(n)+1, n=1,…,N, such that the ratios a(n)=A(n)/A(n−1) have some number-theoretic or combinatorial meaning.
Eric Levieil +2 more
doaj +1 more source
Wage growth of less educated workers: the importance of social skills
Fiscal Studies, EarlyView.Abstract We use matched employee–employer data from the UK to investigate the importance of social skills – in particular, teamwork and communication with co‐workers – as a driver of wage growth for workers with lower formal education. We find that in social skill tasks, a significant fraction of less educated workers enjoy wage progression with tenure,
Philippe Aghion +3 more
wiley +1 more source
A characterization of the algebra of holomorphic functions on a simply connected domain
International Journal of Mathematics and Mathematical Sciences, 1989 Let A be a singly-generated ℱ-algebra. It is shown that A isomorphic to H(Ω) where Ω is a simply connected domain in ℂ if and only if A has no topological divisors of zero.
Derming Wang, Saleem Watson
doaj +1 more source