Results 41 to 50 of about 15,188 (171)

A unified projection formalism for the Al-Pd-Mn quasicrystal Xi-approximants and their metadislocations

open access: yes, 2007
The approximants xi, xi' and xi'_n of the quasicrystal Al-Mn-Pd display most interesting plastic properties as for example phason-induced deformation processes (Klein, H., Audier, M., Boudard, M., de Boissieu, M., Beraha, L., and Duneau, M., 1996, Phil ...
H.-R. Trebin, Klein H, M. Engel
core   +1 more source

Primitive icosahedral quasicrystals in ZnMgLi(Dy, Ho, Er, Tm) systems

open access: yesActa Crystallographica Section A, EarlyView.
The study introduces new primitive icosahedral quasicrystals in Zn–Mg–Li–(Dy, Ho, Er, Tm) systems. Quasicrystals are studied with an X‐ray diffraction technique resolving the local atomic structure.New quasicrystals with rare‐earth elements and Li are synthesized with the self‐flux method. The starting composition involves 62.8 at.% Zn, 28.6 at.% Mg, 3.
Ireneusz Buganski   +6 more
wiley   +1 more source

More absorbers in hyperspaces

open access: yes, 2016
The family of all subcontinua that separate a compact connected $n$-manifold $X$ (with or without boundary), $n\ge 3$, is an $F_\sigma$-absorber in the hyperspace $C(X)$ of nonempty subcontinua of $X$.
Krupski, Paweł, Samulewicz, Alicja
core   +1 more source

Tychonoff's Theorem for Hyperspaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1973
If exp ⁡ ( X i ) ∖ { ∅ } \exp ({X_i})\backslash \{ \emptyset \} is equipped with a topology that preserves the topological convergence of nets of sets for every i ∈ I i \in I , then the ...
openaire   +1 more source

Exploring oxide quasicrystals in internal space

open access: yesActa Crystallographica Section A, EarlyView.
The internal space expansion with variable system size is investigated for three different oxide quasicrystal systems. Patches of 7800, 4800 and 3600 vertices are examined in Ba–Ti–O/Pt(111), Eu–Ti–O/Pd(111) and Sr–Ti–O/Pd(111), respectively. This internal space inspection provides unique structural information for quasicrystalline systems, which goes ...
Sebastian Schenk   +3 more
wiley   +1 more source

Astrotheology: The natural interface between hyperspace and the Trinity

open access: yesActa Theologica, 2023
Over the past few decades, physicists are seeking a unifying theory that could encapsulate the theories of general relativity and quantum mechanics, our understanding of the very big and the infinitesimal small, into one all-inclusive theory. This quest
A.C. Pieterse
doaj   +1 more source

Some remarks on hyperspaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1969
1. The purpose of this paper is to answer a question of R. Schori [3] and to provide simpler arguments for some generalizations of Schori's results. If X is a metric space, the hyperspace of X, denoted 2X, is the space of all nonvoid closed subsets of X with the usual Hausdorff metric.
openaire   +2 more sources

Outcomes of Permanent Tooth Intrusion; Pulp Necrosis, Ankylosis and Tooth Loss

open access: yesDental Traumatology, EarlyView.
ABSTRACT Background/Aim The aim of this study was to examine the timing of pulp necrosis, ankylosis, and tooth loss in intruded permanent teeth based on the stage of root development, degree of intrusion, and initial treatment. Materials and Methods In this retrospective study of intruded permanent teeth between 2013 and 2021, data from 112 teeth in 77
Brittany M. Schweiger   +4 more
wiley   +1 more source

Combined energy -- diffraction data refinement of decagonal AlNiCo

open access: yes, 2003
We incorporate realistic pair potential energies directly into a non-linear least-square fit of diffraction data to quantitatively compare structure models with experiment for the Ni-rich $d$(AlNiCo) quasicrystal. The initial structure models are derived
Abe   +19 more
core   +1 more source

Embedding hyperspaces

open access: yesTopology and its Applications, 2012
For a continuum, i.e. a compact connected metric space, with more than one point, the following hyperspaces are considered. \(C(X)\) consists of all subcontinua of \(X\) and \(F_2(X)\) of all nonempty subsets of \(X\) with at most two points. These hyperspaces are endowed with the Hausdorff metric.
Martínez-de-la-Vega, Verónica   +1 more
openaire   +2 more sources

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