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Compact triplexer with open ring resonators as microstrip trisection bandpass filters for asymmetric response
(Scopus, 2013)
Open loop ring resonators are used as the basic block of a compact planar triplexer, they are used in cascaded trisection (CT) filters, in order to reduce the circuit size. The CT filter has a cross coupling that produces ...
Non-commutative reduction rings
(Universidad Nacuional de Colombia; Sociedad Colombiana de matemáticas, 1999)
Reduction relations are means to express congruences on rings. In the special case of congruences induced by ideals in commutative polynomial rings, the powerful tool of Grabner bases can be characterized by properties of ...
Growth rate and ring width variability of teak, Tectona grandis (Verbenaceae) in an unmanaged forest in East Timor
(Universidad de Costa Rica, 2012)
Central quasipolar rings
(Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Matemáticas - Sociedad Colombiana de Matemáticas, 2015-07-01)
In this paper, we introduce a kind of quasipolarity notion for rings, namely, an element a of a ring R is called central quasipolar if there exists p2 = p ∈ R such that a + p is central in R, and the ring R is called central ...
The isomorphism problem for graph magma algebras
(One-value) graph magma algebras are algebras having a basis B = V boolean OR {1} such that, for all u,v is an element of V, uv is an element of {u,0}. Such bases induce graphs and, conversely, certain types of graphs ...
Computing bases of complete intersection rings in Noether position
(Universidad de San Andrés. Departamento de Matemáticas y Ciencias, 1999-11)
Ring chromosome instability evaluation in six patients with autosomal rings
(FUNPEC-EDITORA, 2010)
Ring chromosomes are often associated with abnormal phenotypes due to loss of genomic material and also because of ring instability at mitosis after sister chromatid exchange events. We investigated ring chromosome instability ...
Properties of galaxies with ring structures
(EDP Sciences, 2021-09)
Aims: We present a statistical analysis of different characteristics of ringed spiral galaxies with the aim of assessing the effects of rings on disk galaxy properties. Methods: We built a catalog of ringed galaxies from ...