In this paper, a novel four-level single-phase multilevel converter is introduced, consisting of six active switches arranged in quasi-nested configuration. The proposed topology synthesizes its output voltage levels with respect to floating neutral point, using four cascaded capacitors identical levels. contains reduced number components compared the point clamped (NPC) or active-NPC topologie...

We consider the Dirac cones and higher-order topological phases in quasi-continuous media of classical waves (e.g., photonic sonic crystals). Using crystals as prototype examples, we revisit some known systems study acoustics. show emergence various band gaps same motherboard by tuning geometry system. provide a pedagogical review underlying physics methodology via bulk-edge-corner corresponden...

The purpose of the present notes is to examine following issues related Chernoff estimate: (1) For contractions on a Banach space we modify $\sqrt{n}$-estimate and apply it in proof product formula for $C_0$-semigroups \textit{strong} operator topology. (2) We use idea {probabilistic} approach, proving estimate strong topology, uplift \textit{operator-norm} \textit{quasi-sectorial} contraction ...

Phase singularities appear ubiquitously in wavefields, regardless of the wave equation. Such topological defects can lead to wavefront dislocations, as observed a humongous number classical experiments. functions are also at heart classification gapped phases matter. Despite identical singular features, insulators and waves remain two distinct fields. Realising 1D microwave insulators, we exper...

Among the various parameters and constraints considered that are affected by optimal deployments, performance as per the mac layer has attained limited attention. This article is aimed at two things. Firstly, it aims to understand the packet delivery parameters for convergecast communication pattern ideal for Zigbee based wireless sensor networks. It also compares the mac layer metrics for the ...

In this paper, by means of operations (is called in [1, 2, 3] φ,ψ) we shall define φψ-continuity between two L-fuzzy quasi-uniform spaces. We shall prove that φψ-continuity between two L-fuzzy quasi-uniformity induces φψ-continuity between L-fuzzy topology generated by them. We shall investigate some Theorems on L-fuzzy uniform spaces. 2000 Mathematics Subject Classification:54A40, 03E72

The weightable quasi-pseudo-metric spaces have been introduced by Matthews as part of the study of the denotational semantics of dataflow networks (e.g. [Mat92] and [Mat92a]). The study of these spaces has been continued in the context of Nonsymmetric Topology by Kunzi and Vajner ([KV93] and [Kün93]). We introduce and motivate the class of upper weightable quasi-pseudo-metric spaces. The relati...

208 NOTICES OF THE AMS VOLUME 51, NUMBER 2 As far as I know, the notion of a quasi-morphism does not have much to do with category theory. This very natural idea underlies several interesting recent developments at the crossroads of algebra, topology, geometry, and dynamics. Other, perhaps better, names currently in use for the same concept are quasi-homomorphism and pseudo-character. Let G be ...