Results 11 to 20 of about 637,575 (255)
Broadband graphene-based metamaterial absorbers
AIP Advances, 2018 In this paper, a new type of broadband tunable metamaterial absorber is proposed. The structure consists of a single-layer ring graphene and a metal ground plane separated by a dielectric spacer.
Chang Liu, Limei Qi, Xu Zhang
doaj +1 more source
A uniqueness theorem for stable homotopy theory [PDF]
, 1999 In this paper we study the global structure of the stable homotopy theory of spectra. We establish criteria for when the homotopy theory associated to a given stable model category agrees with the classical stable homotopy theory of spectra.
Schwede, Stefan, Shipley, Brooke
core +3 more sources
8-(Pyridin-2-yl)quinolin-7-ol as a Platform for Conjugated Proton Cranes: A DFT Structural Design
Micromachines, 2020 Theoretical design of conjugated proton cranes, based on 7-hydroxyquinoline as a tautomeric sub-unit, has been attempted by using ground and excited state density functional theory (DFT) calculations in various environments.
Anton Georgiev, Liudmil Antonov
doaj +1 more source
Semiconjugate Factorizations of Higher Order Linear Difference Equations in Rings [PDF]
, 2013 We study linear difference equations with variable coefficients in a ring using a new nonlinear method. In a ring with identity, if the homogeneous part of the linear equation has a solution in the unit group of the ring (i.e., a unitary solution) then ...
Sedaghat, H.
core +1 more source
On the identity of the last known stable radical in X-irradiated sucrose [PDF]
, 2017 Identification of radiation-induced radicals in relatively simple molecules is a prerequisite for the understanding of reaction pathways of the radiation chemistry of complex systems.
Callens, Freddy +4 more
core +1 more source
Analysis and Design of a Metamaterial Lens Antenna Using the Theory of Characteristic Modes
International Journal of Antennas and Propagation, 2018 A new single-layer metamaterial lens antenna aimed to operate at 10 GHz is proposed in this paper. The lens antenna consists of twelve capacitively coupled unit cells distributed along a ring and illuminated by an open-ended circular waveguide with a ...
Daniel Santillán-Haro +3 more
doaj +1 more source
Sensors, 2017 A surface plasmon polariton refractive index sensor based on Fano resonances in metal–insulator–metal (MIM) waveguides coupled with rectangular and ring resonators is proposed and numerically investigated using a finite element method.
Yue Tang +6 more
doaj +1 more source
The almost isomorphism relation for simple regular rings [PDF]
, 1992 A longstanding open problem in the theory of von Neumann regular rings is the question of whether every directly finite simple regular ring must be unit-regular. Recent work on this problem has been done by P. Menal, K.C . O'Meara, and the authors.
Ara, Pere,, Goodearl, K. R.
core +2 more sources
AIP Advances, 2022 We explore the stable configurations of atomic species on a hexagonal plane in two-dimensional (2D) binary systems. We investigate configurations for 9 and 16 atomic sites in the unit cell (3 × 3 and 4 × 4 supercells) by using the density-functional ...
Shota Ono
doaj +1 more source
The Journal of Engineering, 2018 A highly efficient integrated transmission unit – external generating wave movable teeth transmission − was proposed and two kinds of typical transmission types were researched.
Yali Yi, Yunfei Gao, Rui Wei, Herong Jin
doaj +1 more source