Results 61 to 70 of about 1,727 (183)

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, Ryan A. McManamay, Jay A. Oliver, David Young, Preston Bean, Kevin Mayes   +5 more
wiley   +1 more source

Zero Divisor Graph of Quotient Ring

Cauchy: Jurnal Matematika Murni dan Aplikasi
Recently, a lot of research has been carried out regarding graphs built from algebraic structures, including ring structures. One important example of a graph constructed from a ring is the zero divisor graph.
Ayunda Faizatul Musyarrofah, Vira Hari Krisnawati, Noor Hidayat   +2 more
doaj   +1 more source

Regression‐based models for the torsional stiffness reduction factor in reinforced concrete beams under combined torsion and shear

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, Jordlly R. B. Silva, Bernardo Horowitz   +2 more
wiley   +1 more source

Zero divisor graphs of semigroups

Journal of Algebra, 2005
Let \(S\) be a commutative semigroup with \(0\). A simple graph \(G\) whose vertices are the nonzero zero divisors of \(S\) with two distinct vertices joined by an edge in case when their product in \(S\) is \(0\) is called the zero divisor graph of \(S\). In the paper some characterizations of graphs to be zero divisor graphs of a semigroup are given.
DeMeyer, Frank, DeMeyer, Lisa
openaire   +2 more sources

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, Antonin Bergeaud, Richard Blundell, Rachel Griffith   +3 more
wiley   +1 more source

Molecular phylogenetic analysis sheds light on the diversity and evolutionary history of the Neotropical and African Triplophyllum (Tectariaceae)

Journal of Systematics and Evolution, EarlyView.
We used a molecular approach to resolve the evolutionary lineages of Neotropical Triplophyllum, uncovering that current species circumscriptions are hindered by high morphological homoplasy in indument characters. Our results support the recognition of three new species and provide a necessary neotypification for T.
Mauricio Gonçalves Nunes, Amabily Bohn, Jefferson Prado, Regina Y. Hirai, Hanna Tuomisto, Germinal Rouhan, Paulo H. Labiak   +6 more
wiley   +1 more source

Group Action on the Set of Nonunits in Rings

Journal of Mathematics, 2023
Let R be a ring, G be the group of all units of R, and X=R−G∪0. In this paper, we investigate avxx∈X=oxx∈X for a ring R, where avx is the set of all vertices of the zero-divisor graph of R adjacent to x.
Eman S. Almotairi, M. Imran Bhat, Ahmad M. Alghamdi   +2 more
doaj   +1 more source

On Short‐Term Behavior of Implied Volatility for Index Options

Mathematical Finance, EarlyView.
ABSTRACT This paper investigates short‐term behavior of implied volatility of derivatives written on a market index when the index is constructed using a ranking procedure. Even when stock prices follow geometric Brownian motion dynamics, the ranking mechanism can lead to the observed term structure of at‐the‐money (ATM) implied volatility skew for ...
Huy N. Chau, Duy Nguyen, Thai Nguyen
wiley   +1 more source

Adjacency spectra and Laplacian integrality of zero divisor graphs over some rings

Kuwait Journal of Science
Let 𝑅 be a commutative ring and let 𝑍∗ (𝑅) denote the set of non-zero zero divisors of 𝑅. The zero divisor graph 𝛤(𝑅) is defined as the simple graph with vertex set 𝑍∗ (𝑅), where two distinct vertices 𝑥, 𝑦 ∈ 𝑍∗ (𝑅) are adjacent if and only if 𝑥𝑦 = 0.
Bilal Ahmad Rather, Parvez Ali, M. Imran, A. Kothepeda   +3 more
doaj   +1 more source

A characterization of singular endomorphisms of a barrelled Pták space

International Journal of Mathematics and Mathematical Sciences, 1982
The concept of topological divisor of zero has been extended to endomorphisms of a locally convex topological vector space (LCTVS). A characterization of singular endomorphisms, similar to that of Yood [1], is obtained for endomorphisms of a barrelled ...
Damir Franekić
doaj   +1 more source