Results 31 to 40 of about 1,563,307 (153)
Acta Crystallographica Section E: Crystallographic Communications, 2021 The title molecule, C20H15NO3, adopts a Z-shaped conformation with the carboxyl group nearly coplanar with the dihydroquinoline unit. In the crystal, corrugated layers are formed by C—H...O hydrogen bonds and are stacked by C—H...π(ring) interactions ...
Younos Bouzian +5 more
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
Angewandte Chemie, 2023 Artificial H2O2 photosynthesis by covalent organic frameworks (COFs) photocatalysts is promising for wastewater treatment. The effect of linkage chemistry of COFs as functional basis to photoelectrochemical properties and photocatalysis remains a ...
Yi Mou +9 more
semanticscholar +1 more source
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
International journal of RF and microwave computer-aided engineering, 2020 This paper presents a compact 5G multiple‐input multiple‐output (MIMO) microstrip antenna with isolation enhancement based on a slotted complementary split‐ring resonator (SCSRR) and the theory of characteristic modes (TCMs).
Ahmed Abdelaziz, E. Hamad
semanticscholar +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
International Journal of Distributed Sensor Networks, 2022 As the most important segment of the spindle unit angular contact ball bearing, the preload significantly influences the bearing characteristics. Thus, the thermal-induced preload derived from the thermal expansion of spindle unit components also affects
Yanfang Dong, Feifan Chen, Ming Qiu
doaj +1 more source
Pumping a Ring-Sliding Molecular Motion by a Light-Powered Molecular Motor.
Journal of Organic Chemistry, 2019 Designing artificial molecular machines to execute complex mechanical tasks, like coupling rotation and translation to accomplish transmission of motion, continues to provide important challenges.
Jing‐Jing Yu +11 more
semanticscholar +1 more source