Results 11 to 20 of about 37,521 (247)

Quasi-k-normal ring

open access: yes, 2023
In [4] Wei and Libin defined Quasi normal ring. In this paper we attempt to define Quasi-k-normal ring by using the action of k-potent element. A ring is called Quasi-k-normal ring if ae = 0 ⇒ eaRe = 0 for a ∈ N(R)and e ∈ K(R), where K(R) = {e ∈ R|ek = e}
Saikia, Helen K.   +2 more
core   +1 more source

Smarandache rings [PDF]

open access: yes, 2002
Over the past 25 years, I have been immersed in research in Algebra and more particularly in ring theory. I embarked on writing this book on Smarandache rings (Srings) specially to motivate both ring theorists and Smarandache algebraists to develop and ...
Vasantha, Kandasamy
core   +1 more source

Disentangling global and local ring currents

open access: yes, 2022
Magnetic field-induced ring currents in aromatic and antiaromatic molecules cause characteristic shielding and deshielding effects in the molecules’ NMR spectra. However, it is difficult to analyze (anti)aromaticity directly from experimental NMR data if
David, Bradley   +3 more
core   +1 more source

A survey of low-velocity collisional features in Saturn's F ring [PDF]

open access: yes, 2014
Small (~50km scale), irregular features seen in Cassini images to be emanating from Saturn's F ring have been termed mini-jets by Attree et al. (2012). One particular mini-jet was tracked over half an orbital period, revealing its evolution with time and
Murray, Carl D   +7 more
core   +1 more source

A NOTE ON SIMPLE MODULES OVER QUASI-LOCAL RINGS

open access: yesInternational Electronic Journal of Algebra, 2018
Dedicated to John ...
CARVALHO,, Paula A. A. B.   +2 more
openaire   +5 more sources

An Elitist Learning Particle Swarm Optimization With Scaling Mutation and Ring Topology

open access: yesIEEE Access, 2018
Particle swarm optimization (PSO) is an evolutionary algorithm that is well known for its simplicity and effectiveness. It usually has strong global search capability but has the drawback of being easily trapped by local optima.
Guangzhi Xu   +4 more
doaj   +1 more source

Mass and Angular Momentum Transport in a Gravitationally Unstable Protoplanetary Disk with Improved 3D Radiative Hydrodynamics

open access: yesThe Astrophysical Journal, 2023
During early phases of a protoplanetary disk's life, gravitational instabilities (GIs) can produce significant mass transport, can dramatically alter disk structure, can mix and shock-process gas and solids, and may be instrumental in planet formation ...
Thomas Y. Steiman-Cameron   +5 more
doaj   +1 more source

Influence of Rotational Stiffness Modeling on the Joint Behavior of Quasi-Rectangular Shield Tunnel Linings

open access: yesApplied Sciences, 2020
A beam-spring model with constant rotational stiffness is a practical tool for the prediction of the general deformations and bending moments in circular tunnel linings.
Weixi Zhang   +3 more
doaj   +1 more source

Spatial distribution model of the filling and diffusion pressure of synchronous grouting in a quasi-rectangular shield and its experimental verification

open access: yesUnderground Space, 2021
Considering that the particular geometric shape of a quasi-rectangular shield, the grout flowing law and its motion process are more complicated than those of a conventional circular shield.
Jun Liu   +5 more
doaj   +1 more source

On quasi-local noetherian rings [PDF]

open access: yesProceedings of the American Mathematical Society, 1969
It is the purpose of this note to show that each semiprime, quasilocal, noetherian ring with gl. dim R?2 is Morita equivalent to a quasi-local noetherian domain D with gl. dim D < 2 (cf. Theorem 1). All rings considered here have an identity element; all modules are assumed to be unitary.
openaire   +1 more source

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