1,471 research outputs found
Performance of Hollow Load Process Challenge Devices (HLPCDs) for the determination of air removal and steam penetration in porous load steam sterilization processes: Part 1 β The evolution of HLPCDs in standards and a review of the current supporting published evidence
Steam sterilization Process Challenge Devices (PCDs) are devices which present a defined challenge to a sterilization process. In part one of a two part series the authors review the published literature covering studies evaluating the removal of air and penetration of steam into hollow tubular devices and then discuss the relevance of the material in support of the current custom and practice of utilising simple tubular PCDs (Hollow Load Process Challenge Devices HLPCDs) as a means of monitoring production loads for adequacy of air removal and steam penetration. This review places such data in the context of the evolution of HLPCDs in the standards for small and large porous load steam sterilizers. With regard to the apparent acceptance of the HLPCD in EN 867-5 into custom and practice for batch monitoring the literature suggests this may be misleading. The literature review concludes that there is an urgent need for an International Standard which describes how a HLPCD can be developed and tested against real medical devices in a range of sterilization processes representing current state of the art in full load conditions
Z-stability and finite dimensional tracial boundaries
We show that a simple separable unital nuclear nonelementary Cβ-algebra whose tracial state space has a compact extreme boundary with finite covering dimension admits uniformly tracially large order zero maps from matrix algebras into its central sequence algebra. As a consequence, strict comparison implies Z-stability for these algebras
The Cuntz semigroup and stability of close C*-algebras
We prove that separable C*-algebras which are completely close in a natural
uniform sense have isomorphic Cuntz semigroups, continuing a line of research
developed by Kadison - Kastler, Christensen, and Khoshkam. This result has
several applications: we are able to prove that the property of stability is
preserved by close C*-algebras provided that one algebra has stable rank one;
close C*-algebras must have affinely homeomorphic spaces of
lower-semicontinuous quasitraces; strict comparison is preserved by sufficient
closeness of C*-algebras. We also examine C*-algebras which have a positive
answer to Kadison's Similarity Problem, as these algebras are completely close
whenever they are close. A sample consequence is that sufficiently close
C*-algebras have isomorphic Cuntz semigroups when one algebra absorbs the
Jiang-Su algebra tensorially.Comment: 26 pages; typos fixe
Marshall University Department of Music presents a Senior Recital Andrew Winter
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