Results 51 to 60 of about 461 (146)

Geometric visual hallucinations, Euclidean symmetry and the functional architecture of striate cortex [PDF]

open access: yes, 2001
This paper is concerned with a striking visual experience: that of seeing geometric visual hallucinations. Hallucinatory images were classified by Klüver into four groups called form constants comprising (i) gratings, lattices, fretworks, filigrees ...
Golubitsky, Martin   +9 more
core   +1 more source

Approximation properties for discrete groups

open access: yes, 2006
We give an overview of approximation properties in the context of operator algebras associated with ...
Brodzki, Jacek, Niblo, Graham A.
core   +1 more source

Advanced imaging and multi‐omics to characterize cardiomyocyte ageing and its electrocardiographic imprint in PKP2 arrhythmogenic cardiomyopathy

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend We used a murine model of cardiomyocyte‐specific conditional knockout of plakophilin 2 (PKP2cKO, middle panel). Using advanced imaging technology, we unveiled distinct hallmarks of premature ageing in PKP2cKO cardiomyocytes, including DNA damage and loss of repressed heterochromatin at the nuclear periphery, and mitochondrial ...
Giorgia Bertoli   +12 more
wiley   +1 more source

Cohomology and the subgroup structure of a finite soluble group [PDF]

open access: yes
The main topic of this thesis is the discovery and study of a cohomological property of the subgroups called F-normalizers in finite soluble groups; namely, the property that with certain coefficient modules the restriction map in cohomology from a ...
Wilde, Thomas Stephen
core  

Smarandache rings [PDF]

open access: yes, 2002
Over the past 25 years, I have been immersed in research in Algebra and more particularly in ring theory. I embarked on writing this book on Smarandache rings (Srings) specially to motivate both ring theorists and Smarandache algebraists to develop and ...
Vasantha, Kandasamy
core   +1 more source

Two matrix group algorithms with applications to computing the automorphism group of a finite p-group [PDF]

open access: yes, 2000
A theoretical description of an algorithm to determine the automorphism group of a finite p-group P was first given by Newman. Implementations of this algorithm with substantial improvements by O’Brien are available in GAP and Magma.
Schwingel, R
core   +3 more sources

Computational Design and Theoretical Evaluation of Novel Heterocyclic Energetic Materials Based on 5‐H‐Imidazo‐[4,5‐c]‐Pyridazine and 1,2,4‐Triazolo‐[4,3‐a]‐Pyrazine Scaffolds

open access: yesJournal of Computational Chemistry, Volume 47, Issue 23, September 5, 2026.
Eighty‐eight novel energetic compounds based on 5‐H‐imidazo‐[4,5‐c]pyridazine and 1,2,4‐triazolo‐[4,3‐a]pyrazine scaffolds, functionalized with nitro, nitramino, azido, and nitrate ester groups, were theoretically evaluated by DFT. Nine candidates surpassed RDX in density and detonation performance while maintaining acceptable impact sensitivity.
Luciana Amorim da Silva   +3 more
wiley   +1 more source

Elucidating the Effect of Ferroelectricity in Bismuth Ferrite Solar Cells

open access: yesAdvanced Physics Research, Volume 5, Issue 9, September 2026.
The polarization of Bi0.9Ca0.1FeO3‐δ in metal‐ferroelectric‐metal (MFM) devices creates asymmetric Schottky barriers that leverage directional photocurrents under illumination. The effect disappears and the Schottky barriers become almost symmetric upon enhanced calcium substitution (Bi0.7Ca0.3FeO3‐δ) and thus transition to the nonferroelectric phase ...
Marcel Habrik   +3 more
wiley   +1 more source

On pro-isomorphic zeta functions of $D^*$-groups of even Hirsch length [PDF]

open access: yes, 2023
The pro-isomorphic zeta function of a finitely generated nilpotent group is a Dirichlet generating series that enumerates all finite-index subgroups whose profinite completion is isomorphic to that of the ambient group.
Onn, Uri   +2 more
core   +1 more source

A Linear Generalization of the Nearly Gorenstein Property, With Applications to Veronese Subalgebras

open access: yesMathematische Nachrichten, Volume 299, Issue 9, Page 2436-2451, September 2026.
ABSTRACT We study the nearly Gorenstein property for Veronese subalgebras of (semi‐)standard graded algebras. We introduce a condition (♮)$(\natural)$ for Cohen–Macaulay semi‐standard graded rings, motivated by the study of Ehrhart rings. We show that if a semi‐standard graded algebra R$ R$ satisfies (♮)$(\natural)$, then its Veronese subalgebras R(k)$
Sora Miyashita
wiley   +1 more source

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