Results 81 to 90 of about 1,563,307 (153)

Reconfigurable Rectangular Filter With Continuously Tunable Bandwidth and Wavelength

IEEE Photonics Journal, 2020
We propose and demonstrate a rectangular optical lattice filter with reconfigurable bandwidth and wavelength. The proposed reconfigurable rectangular lattice filter consists of three-stage cascaded ring-assisted Mach-Zehnder interferometers (RAMZIs), and
Jiachen Li, Sigang Yang, Hongwei Chen, Minghua Chen   +3 more
doaj   +1 more source

Group rings whose group of units is hyperbolic [PDF]

arXiv, 2010
We study those group rings whose group of units is hyperbolic.
arxiv  

Synthesis, crystal structure at 219 K and Hirshfeld surface analyses of 1,4,6-trimethylquinoxaline-2,3(1H,4H)-dione monohydrate

Acta Crystallographica Section E: Crystallographic Communications, 2020
The asymmetric unit of the title compound, C11H12N2O2·H2O, contains a molecule of 1,4,6-trimethyl-1,4-dihydroquinoxaline-2,3-dione and a solvent water molecule. Four atoms of the benzene ring are disordered over two sets of sites in a 0.706 (7):0.294 (7)
Ayman Zouitini, Md. Serajul Haque Faizi, Younes Ouzidan, Fouad Ouazzani Chahdi, Jérôme Marrot, Damien Prim, Necmi Dege, Ashraf Mashrai   +7 more
doaj   +1 more source

Unit Groups of Representation Rings and their Ghost Rings as Inflation Functors [PDF]

arXiv, 2016
The theory of biset functors developed by Serge Bouc has been instrumental in the study of the unit group of the Burnside ring of a finite group, in particular for the case of p-groups. The ghost ring of the Burnside ring defines an inflation functor, and becomes a useful tool in studying the Burnside ring functor itself.
arxiv  

The Fundamental System of Units for Cubic Number Fields [PDF]

, 2020
Let $K$ be a number field of degree $n$. An element $\alpha \in K$ is called integral, if the minimal polynomial of $\alpha$ has integer coefficients. The set of all integral elements of $K$ is denoted by $\mathcal{O}_K$. We will prove several properties
Huth, Janik
core   +1 more source

Synthesis of Unsymmetrically Condensed Benzo- and Thienotriazologermoles

Molecules
Germoles and siloles unsymmetrically condensed with heteroaromatic units are attracting much interest. In this study, compounds containing a triazologermole core unit condensed with a benzene or thiophene ring were prepared.
Cong-Huan Wang, Yohei Adachi, Joji Ohshita   +2 more
doaj   +1 more source

Torsion units in integral group rings of Conway simple groups [PDF]

arXiv, 2010
Using the Luthar--Passi method, we investigate the possible orders and partial augmentations of torsion units of the normalized unit group of integral group rings of Conway simple groups $Co_1$, $Co_2$ and $Co_3$.
arxiv  

Metamaterial superstrate microstrip patch antenna for 5G wireless communication based on the theory of characteristic modes

Journal of Electrical Engineering, 2019
Metamaterials (MTMs) have received considerable attention due to their novel electromagnetic properties. Their applications include enhancing gain and bandwidth in microstrip antennas.
E. Hamad, Ahmed Abdelaziz
semanticscholar   +1 more source

Invertible unital bimodules over rings with local units, and related exact sequences of groups [PDF]

arXiv, 2009
Given an extension $R \subseteq S$ of rings with same set of local units, inspired by the works of Miyashita, we construct four exact sequences of groups relating Picard's groups of $R$ and $S$.
arxiv  

Action Type Geometrical Equivalence of Representations of Groups [PDF]

, 2005
For every variety of algebras and every algebras in these variety we can consider an algebraic geometry. Algebras may be many sorted (not necessarily one sorted) algebras. A set of sorts is fixed for each variety.
Plotkin, B., Tsurkov, A.
core   +1 more source