Results 31 to 40 of about 2,444,013 (293)

Coexistence of Dirac points and nodal chains in photonic metacrystal

open access: yes, 2023
Gapless topological phases, i.e. topological semimetals, come in various forms such as Weyl/Dirac semimetals, nodal line/chain semimetals, and surface-node semimetals. However, the coexistence of two or more topological phases in a single system is still
Long, S   +17 more
core   +1 more source

Two-dimensional hourglass Weyl nodal loop in monolayer Pb(ClO2)2 and Sr(ClO2)2

open access: yesNew Journal of Physics, 2022
The hourglass fermions in solid-state materials have been attracting significant interest recently. However, realistic two-dimensional (2D) materials with hourglass-shaped band structures are still very scarce.
Xin-Yue Kang   +3 more
doaj   +1 more source

Unstable Points, Ergodicity and Born’s Rule in 2d Bohmian Systems

open access: yesEntropy, 2023
We study the role of unstable points in the Bohmian flow of a 2d system composed of two non-interacting harmonic oscillators. In particular, we study the unstable points in the inertial frame of reference as well as in the frame of reference of the ...
Athanasios C. Tzemos, George Contopoulos
doaj   +1 more source

(Dis)trust, (un)sefety and Cohesion: Discourses of Vaccinations in Ukraine

open access: yesУкраїнський соціологічний журнал, 2021
The article is devoted to the analysis of vaccination discourses as ways of constructing and transforming social reality. Vaccination is considered, firstly, as a direction of state policy in the social and medical sphere; secondly, as a basis for ...
Olga Filippova, Oleksandra Deineko
doaj   +1 more source

Hex acts with beta-catenin to regulate anteroposterior patterning via a Groucho-related co-repressor and Nodal [PDF]

open access: yes, 2006
In Xenopus, the establishment of the anteroposterior axis involves two key signalling pathways, canonical Wnt and Nodal-related TGFbeta. There are also a number of transcription factors that feedback upon these pathways.
Gardner, Clare E   +11 more
core   +1 more source

Magnonic triply-degenerate nodal points

open access: yes, 2017
We generalize the concept of triply-degenerate nodal points to non-collinear antiferromagnets. Here, we introduce this concept to insulating quantum antiferromagnets on the decorated honeycomb lattice, with spin-1 bosonic quasiparticle excitations known ...
S. A. Owerre
core   +1 more source

Nodal-link semimetals [PDF]

open access: yes, 2017
In topological semimetals, the valance band and conduction band meet at zero-dimensional nodal points or one-dimensional nodal rings, which are protected by band topology and symmetries.
Ling Lu   +11 more
core   +1 more source

Ionic basis of a differential effect of adenosine on refractoriness in rabbit AV nodal and atrial isolated myocytes [PDF]

open access: yes, 1999
Methods: The whole cell patch clamp technique was used to record action potentials and ion currents in AV nodal and left atrial myocytes isolated enzymatically from rabbit hearts.
Kane, K.A., Rankin, A.C., Workman, A.J.
core   +1 more source

Spectrum, trace and nodal points of a sturm-liouville type delayed differential operator with interface conditions

open access: yes, 2021
A formula for regularized sums of eigenvalues of a Sturm–Liouville problem with delayed argument at the point of discontinuity is obtained. Moreover, nodal points of the related problem are investigated.
Şen, Erdoğan, Erdoğan Şen
core   +1 more source

Left-right asymmetry: Nodal points [PDF]

open access: yesJournal of Cell Science, 2003
The striking left-right asymmetry of visceral organs is known to depend on left- and right-side-specific cascades of gene expression during early embryogenesis. Now, developmental biologists are characterizing the earliest steps in asymmetry determination that dictate the sidedness of asymmetric gene expression.
openaire   +2 more sources

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