Results 41 to 50 of about 145,649 (289)
npj Computational Materials, 2021 The discovery and realization of topological insulators, a phase of matter which hosts metallic boundary states when the d-dimension insulating bulk is confined to (d − 1)-dimensions, led to several potential applications.
Marcio Costa +6 more
doaj +1 more source
Factoriality and the Pin-Reutenauer procedure [PDF]
Discrete Mathematics & Theoretical Computer Science, 2016 We consider implicit signatures over finite semigroups determined by sets of pseudonatural numbers. We prove that, under relatively simple hypotheses on a pseudovariety V of semigroups, the finitely generated free algebra for the largest such signature ...
J. Almeida, J. C. Costa, M. Zeitoun
doaj +1 more source
Dynamical Determination of the Metric Signature in Spacetime of Nontrivial Topology
, 1993 The formalism of Greensite for treating the spacetime signature as a dynamical degree of freedom induced by quantum fields is considered for spacetimes with nontrivial topology of the kind ${\bf R}^{D-1} \times {\bf T}^1$, for varying $D$.
A Romeo +13 more
core +2 more sources
Topological Hall signatures of magnetic hopfions [PDF]
Physical Review Research, 2020 Magnetic hopfions are topologically protected three-dimensional solitons that are constituted by a tube which exhibits a topologically nontrivial spin texture in the cross-section profile and is closed to a torus. Here we show that the hopfion's locally uncompensated emergent field leads to a topological Hall signature, although the topological Hall ...
Börge Göbel +3 more
openaire +4 more sources
A new, unique signature of the true cusp [PDF]
Annales Geophysicae, 2001 The "cusp proper" is generally understood to be the region enclosed by the outermost magnetospheric field lines as they map to low altitudes. It is therefore a weak-field region with continuous contact with magnetosheath plasma.
W. R. Keith +2 more
doaj +1 more source
Spikes in Cosmic Crystallography II: Topological Signature of Compact Flat Universes
, 2000 We study the topological signature of euclidean isometries in pair separations histograms (PSH) and elucidate some unsettled issues regarding distance correlations between cosmic sources in cosmic crystallography.
A.F.F. Teixeira +7 more
core +1 more source
Signatures of topological Josephson junctions
Physical Review B, 2016 Quasiparticle poisoning and diabatic transitions may significantly narrow the window for the experimental observation of the 4π-periodic dc Josephson effect predicted for topological Josephson junctions. Here, we show that switching- current measurements provide accessible and robust signatures for topological superconductivity which persist in the ...
Yang Peng +4 more
openaire +3 more sources
Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity
Molecular Oncology, EarlyView.Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung +17 more
wiley +1 more source
Knot Floer homology and the four-ball genus
, 2003 We use the knot filtration on the Heegaard Floer complex to define an integer invariant tau(K) for knots. Like the classical signature, this invariant gives a homomorphism from the knot concordance group to Z. As such, it gives lower bounds for the slice
Boileau +10 more
core +2 more sources
Molecular Oncology, EarlyView.Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson +9 more
wiley +1 more source