Results 21 to 30 of about 623,249 (296)

Tunable Delay Lines in Silicon Photonics: Coupled Resonators and Photonic Crystals, a Comparison

open access: yesIEEE Photonics Journal, 2010
In this paper, we report a direct comparison between coupled resonator optical waveguides (CROWs) and photonic crystal waveguides (PhCWs), which have both been exploited as tunable delay lines.
A. Melloni   +8 more
doaj   +1 more source

Smarandache Non-Associative (SNA-) rings [PDF]

open access: yes, 2005
In this paper we introduce the concept of Smarandache non-associative rings, which we shortly denote as SNA-rings as derived from the general definition of a Smarandache Structure (i.e., a set A embedded with a week structure W such that a proper subset ...
Vasantha Kandasamy, W.B.
core   +1 more source

Weakly quadratent rings

open access: yesJournal of Taibah University for Science, 2019
We completely characterize up to an isomorphism those rings whose elements satisfy the equations $ x^4=x $ or $ x^4=-x $ . Specifically, it is proved that a ring is weakly quadratent if, and only if, it is isomorphic to either K, $ \mathbb {Z}_3 ...
Peter V. Danchev
doaj   +1 more source

EFFECT OF NATURAL CABBAGE and TARO EXTRACTS ON OXIDATIVE ENZYMES ACTIVITY OF FROZEN AND DRIED BANANA PRODUCTS [PDF]

open access: yesJournal of Food and Dairy Sciences, 2009
In this study, effect of taro peel and taro pulp extracts pre-treatments compared with those of cabbage on oxidative enzyme activities of frozen banana pulp and dried banana rings was investigated.
A. M. Helmy   +5 more
doaj   +1 more source

Unification Theories: Rings, Boolean Algebras and Yang–Baxter Systems

open access: yesAxioms, 2023
This paper continues a series of papers on unification constructions. After a short discussion on the Euler’s relation, we introduce a matrix version of the Euler’s relation, E I π+U=O.
Florin F. Nichita
doaj   +1 more source

Universal Enveloping Commutative Rota–Baxter Algebras of Pre- and Post-Commutative Algebras

open access: yesAxioms, 2017
Universal enveloping commutative Rota–Baxter algebras of pre- and post-commutative algebras are constructed. The pair of varieties (RBλCom, postCom) is proved to be a Poincaré–Birkhoff–Witt-pair (PBW)-pair and the pair (RBCom, preCom) is proven not to be.
Vsevolod Gubarev
doaj   +1 more source

Technical elements on the rings in men’s artistic gymnastics—a systematic review [PDF]

open access: yesJournal of Men's Health, 2023
Although rings can move freely in all possible directions, by which they differ from all other apparatuses, physical performance at highest level is essetial in men’s artistic gymnastics to fulfill the exercise’s technical requirements in the interest
Dušan Đorđević   +10 more
doaj   +1 more source

Medieval jewelry at the “Palace Center – East” site in Pliska

open access: yesПриноси към българската археология, 2021
This paper presents jewelry falling into two categories, divided by their material composition – a group of metal items, and a group made from glass. They were found during archaeological excavations of the “Palace Center – East” site in Pliska.
Valeri Grigorov
doaj   +3 more sources

La otra cara de la inmigración: imágenes del latinoamericano en el cine español contemporáneo. Presentación

open access: yesIberoamericana. América Latina - España - Portugal, 2014
Presentación al ...
Guido Rings
doaj   +1 more source

Bounds for Coding Theory over Rings

open access: yesEntropy, 2022
Coding theory where the alphabet is identified with the elements of a ring or a module has become an important research topic over the last 30 years. It has been well established that, with the generalization of the algebraic structure to rings, there is
Niklas Gassner   +3 more
doaj   +1 more source

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