Results 101 to 110 of about 2,302,822 (346)
BRST symmetry of doubled membrane sigma-models
, 2019 Courant sigma-models encode the geometric and non-geometric fluxes of compactified closed string theory as generalized Wess-Zumino terms and exhibit their relation to Courant algebroids.
Chatzistavrakidis, Athanasios +4 more
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Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie, 2013 We replace the classical string theory notions of mapping between parameter space and world-time with noncommutative tori mapping between these spaces. The dynamics of mappings between different noncommutative tori are studied and noncommutative versions of the Polyakov action and the Euler-Lagrange equations are derived.
openaire +3 more sources
Molecular Oncology, EarlyView.A‐to‐I editing of miRNAs, particularly miR‐200b‐3p, contributes to HGSOC progression by enhancing cancer cell proliferation, migration and 3D growth. The edited form is linked to poorer patient survival and the identification of novel molecular targets.
Magdalena Niemira +14 more
wiley +1 more source
Asymptotic behavior of solutions of a Fisher equation with free boundaries and nonlocal term
Electronic Journal of Qualitative Theory of Differential Equations, 2019 We study the asymptotic behavior of solutions of a Fisher equation with free boundaries and the nonlocal term (an integral convolution in space). This problem can model the spreading of a biological or chemical species, where free boundaries represent ...
Jingjing Cai +3 more
doaj +1 more source
H\"uckel--Hubbard-Ohno modeling of $\boldsymbol{\pi}$-bonds in ethene and ethyne with application to trans-polyacetylene [PDF]
, 2015 Quantum chemistry calculations provide the potential energy between two carbon atoms in ethane (H$_3$C$-$CH$_3$), ethene (H$_2$C$=$CH$_2$), and ethyne (HC$\equiv$CH) as a function of the atomic distance. Based on the energy function for the $\sigma$-bond
Barcza, Gergely +4 more
core +2 more sources
Singular supersymmetric sigma models
, 2003 Supersymmetric non-linear sigma-models are described by a field dependent Kaehler metric determining the kinetic terms. In general it is not guaranteed that this metric is always invertible. Our aim is to investigate the symmetry structure of supersymmetric models in four dimensional space-time in which metric singularities occur.
Nyawelo, T. S. +3 more
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Molecular Oncology, EarlyView.This study indicates that Merkel cell carcinoma (MCC) does not originate from Merkel cells, and identifies gene, protein & cellular expression of immune‐linked and neuroendocrine markers in primary and metastatic Merkel cell carcinoma (MCC) tumor samples, linked to Merkel cell polyomavirus (MCPyV) status, with enrichment of B‐cell and other immune cell
Richie Jeremian +10 more
wiley +1 more source
Fractional particle and sigma model
Journal of High Energy PhysicsWe introduce a classical fractional particle model in ℝ n , extending the Newtonian particle concept with the incorporation of the fractional Laplacian.
Ion V. Vancea
doaj +1 more source
Model companions of theories with an automorphism
, 1998 For a theory $T$ in $L, T_\sigma$ is the theory of the models of $T$ with an automorphism $\sigma$. If $T$ is an unstable model complete theory without the independence property, then $T_\sigma$ has no model companion.
Kikyo, Hirotaka
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Integrability in sigma-models [PDF]
, 2019 Abstract The following topics are covered in this chapter: (1) Homogeneous spaces, (2) Classical integrability of sigma-models in two dimensions, (3) Topological terms, (4) Background-field method and beta-function, (5) S-matrix bootstrap in the O(N) model, (6) Supersymmetric coset models and strings on AdS(d) x X.
openaire +2 more sources