Results 11 to 20 of about 1,346,227 (289)

Check List of Identified Lepidoptera Collected at Mud Lake State Nature Preserve, Williams County, Ohio [PDF]

open access: yes, 2018
A total of 696 species ofLepidoptera is reported from the Mud Lake State Nature Preserve, Williams County, Ohio. This preserve is only a few miles from both the Indiana and Michigan state borders.
Rings, Roy W
core   +3 more sources

An improvement of competitive exercises performing on the rings by 10–12 year old gymnasts using special physical training

open access: yesСлобожанський науково-спортивний вісник, 2017
Purpose: to reveal the influence of the level of special physical readiness of gymnasts of 10–12 years on the technique of performing exercises on rings. Material & Methods: for the task of testing the level of special physical and technical preparedness
Alfiya Deyneko
doaj   +1 more source

Quasi self-dual codes over non-unital rings from three-class association schemes

open access: yesAIMS Mathematics, 2023
Let $ E $ and $ I $ denote the two non-unital rings of order 4 in the notation of (Fine, 93) defined by generators and relations as $ E = \langle a, b \mid 2a = 2b = 0, a^2 = a, b^2 = b, ab = a, ba = b\rangle $ and $ I = \langle a, b \mid 2a = 2b = 0, a ...
Adel Alahmadi   +2 more
doaj   +1 more source

Traces on Semigroup Rings and Leavitt Path Algebras [PDF]

open access: yes, 2015
The trace on matrix rings, along with the augmentation map and Kaplansky trace on group rings, are some of the many examples of linear functions on algebras that vanish on all commutators.
Mesyan, Zachary, Vas, Lia
core   +1 more source

Theoretical model for double-skinned concrete-filledsteel-tubular columns with external confinement

open access: yesJournal of Civil Engineering and Management, 2015
Recent advances in the production of super-fine cement and filler technology has made the production of high-strength concrete (HSC) of 120 MPa practicable in the industry.
Chun Xiao Dong, Johnny Ching Ming Ho
doaj   +1 more source

Lepidoptera Recorded From the Islands of Western Lake Erie, With a Brief Account of Geology and Flora [PDF]

open access: yes, 2017
A list of Lepidoptera from the islands of western Lake Erie is presented along with a brief account of the geology, flora, and human activities in the area. The checklist contains 169 species representing 27 families.
Horns, David J   +2 more
core   +2 more sources

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

Branch rings, thinned rings, tree enveloping rings [PDF]

open access: yesIsrael Journal of Mathematics, 2006
We develop the theory of ``branch algebras'', which are infinite-dimensional associative algebras that are isomorphic, up to taking subrings of finite codimension, to a matrix ring over themselves. The main examples come from groups acting on trees. In particular, for every field k we construct a k-algebra K which (1) is finitely generated and infinite-
openaire   +4 more sources

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

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

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