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Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy
Advanced Engineering Materials, EarlyView.This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb +6 more
wiley +1 more source
Karl Popper and the Mechanisms of Hydrogen Embrittlement
Advanced Engineering Materials, EarlyView.Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
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A universal Polish G-space [PDF]
Topology and Its Applications, 1999 If G is a Polish group, then there is a Polish G-space X which is universal among Polish G-spaces with respect to continuous G-embeddings.
Greg Hjorth
exaly +4 more sources
Polish shop(ping) as Translanguaging Space [PDF]
Social Semiotics, 2017 This article investigates how spatial layout, the display of goods, body movement and gaze work alongside verbalised linguistic codes in\ud creating a Translanguaging Space, using data from a linguistic\ud ethnography project in a family retail shop in East London. We argue\ud that while positioning itself as a “Polski Sklep” (Polish shop) in\ud London,
Li Wei, Hua Zhu, Agnieszka Lyons
exaly +7 more sources
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COMPUTABILITY OF POLISH SPACES UP TO HOMEOMORPHISM
The Journal of Symbolic Logic, 2020AbstractWe study computable Polish spaces and Polish groups up to homeomorphism. We prove a natural effective analogy of Stone duality, and we also develop an effective definability technique which works up to homeomorphism. As an application, we show that there is a $\Delta ^0_2$ Polish space not homeomorphic to a computable one.
Matthew Harrison-Trainor +2 more
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The Space of Simple Configurations is Polish
Mathematical Notes, 2002For a noncompact, locally compact, connected, complete metric space \(M\), let \(\widehat\Gamma\) denote the configuration space with multiple points on \(M\) and let \(\Gamma\) denote the subset of simple configurations. Then the weak topology on \(\widehat\Gamma\) and the subspace topology on \(\Gamma\) are both separable and are both generated by ...
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Computability Theory on Polish Metric Spaces
The Bulletin of Symbolic Logic, 2023AbstractComputability theoretic aspects of Polish metric spaces are studied by adapting notions and methods of computable structure theory. In this dissertation, we mainly investigate index sets and classification problems for computably presentable Polish metric spaces.
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ON “PATHOLOGICAL” SUBSPACES OF POLISH SPACES
AIP Conference Proceedings, 2010Pontryagin gives a well known example of a two—dimensional compact subspaces P and Q; P,Q⊂R5 for which dim(P×Q) = 3. In this note we investigate the conditions for existing of such “exotic” subspaces of an the class of some compact metric spaces (also called often “Polish spaces”); for example—the class of absolutely retracts or the products of ...
Vladimir Todorov +3 more
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1995
A limit point of a topological space is a point that is not isolated, i.e., for every open nbhd U of x there is a point y ∈ U, y≠ x. A space is perfect if all its points are limit points. If P is a subset of a topological space X, we call P perfect in X if P is closed and perfect in its relative topology.
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A limit point of a topological space is a point that is not isolated, i.e., for every open nbhd U of x there is a point y ∈ U, y≠ x. A space is perfect if all its points are limit points. If P is a subset of a topological space X, we call P perfect in X if P is closed and perfect in its relative topology.
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