Results 1 to 10 of about 459,763 (289)

Interpreting Patterns of Concentric Rings within Small Buoyant River Plumes

open access: yesRemote Sensing, 2021
High-resolution imagery of small buoyant plumes often reveals an extensive pattern of concentric rings spreading outward from near the discharge point. Recent remote sensing studies of plumes from rivers flowing into the Black Sea propose that such rings
George Marmorino, Thomas Evans
doaj   +1 more source

Stacked implantation of two prosthetic iris devices for patients with iris defects: A modified surgical technique

open access: yesAmerican Journal of Ophthalmology Case Reports, 2023
Purpose: Iris pigment deficiency in patients with oculocutaneous albinism (OCA) often causes debilitating photophobia, which is routinely managed by sequential intracapsular insertion of two aniridia rings.
David Ethan Rabinovitch   +2 more
doaj   +1 more source

Ring Origami: Snap‐Folding of Rings with Different Geometries

open access: yesAdvanced Intelligent Systems, 2021
Origami folding and thin structure buckling are intensively studied for structural transformations with large packing ratio for various biomedical, robotic, and aerospace applications.
Shuai Wu   +6 more
doaj   +1 more source

Nonassociative Algebras, Rings and Modules over Them

open access: yesMathematics, 2023
The review is devoted to nonassociative algebras, rings and modules over them. The main actual and recent trends in this area are described. Works are reviewed on radicals in nonassociative rings, nonassociative algebras related with skew polynomials ...
Sergey Victor Ludkowski
doaj   +1 more source

A mechanistic reinterpretation of fast inactivation in voltage-gated Na+ channels

open access: yesNature Communications, 2023
The hinged-lid model was long accepted as the canonical model for fast inactivation in Nav channels. It predicts that the hydrophobic IFM motif acts intracellularly as the gating particle that binds and occludes the pore during fast inactivation. However,
Yichen Liu   +3 more
doaj   +1 more source

Port-Hamiltonian Mathematical Model of a Fluid Ring Attitude System

open access: yesEnergies, 2021
In this article, we propose a mathematical model using the port-Hamiltonian formalism for a satellite’s three-axis attitude system comprising fluid rings.
Juan Cristobal Alcaraz Tapia   +2 more
doaj   +1 more source

Goldie's Theorem for Alternative Rings [PDF]

open access: yesProceedings of the American Mathematical Society, 1994
It is known that the socle of a semiprime Goldie ring is generated by a central idempotent and that a prime Goldie ring with a nonzero socle is a simple artinian ring. We prove the extension of these results to alternative rings. We also give an analogue of Goldie’s theorem for alternative rings.
Essannouni, H., Kaidi, A.
openaire   +2 more sources

The dependence of performance characteristics of roller bearing on material used [PDF]

open access: yesОмский научный вестник, 2021
The main materials for the manufacture of rolling stock bearing assemblies are steel ShKh15, ShKh15SG, ShKh4. The article discusses the possibility of using steels 20Kh2N4A, 95Kh18-Sh, 12Kh18N9T as alternative materials, an assessment of the arising ...
D. B. Grits
doaj   +1 more source

Crystal structure of γ-methyl l-glutamate N-carboxy anhydride

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C7H9NO5, alternative name N-carboxy-l-glutamic anhydride γ-methyl ester, the oxazolidine ring is essentially planar with a maximum deviation of 0.020 (3) Å. In the crystal, molecules are linked by N—H...O hydrogen bonds between the
Hitoshi Kanazawa   +3 more
doaj   +1 more source

A characterization of Fuzzy neighborhood commutative division rings

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1993
We give a characterization of fuzzy neighborhood commutative division ring; and present an alternative formulation of boundedness introduced in fuzzy neighborhood rings. The notion of β-restricted fuzzy set is considered.
T. M. G. Ahsanullah, Fawzi Al-Thukair
doaj   +1 more source

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