Results 81 to 90 of about 23,658,748 (362)

A minimalistic pure spinor sigma-model in AdS

Journal of High Energy Physics, 2018
The b-ghost of the pure spinor formalism in a general curved background is not holomorphic. For such theories, the construction of the string measure requires the knowledge of the action of diffeomorphisms on the BV phase space.
Andrei Mikhailov
doaj   +1 more source

On the Spectrum of Superspheres [PDF]

, 2014
Sigma models on coset superspaces, such as odd dimensional superspheres, play an important role in physics and in particular the AdS/CFT correspondence. In this work we apply recent general results on the spectrum of coset space models and on supergroup ...
Cagnazzo, Alessandra, Schomerus, Volker, Tlapak, Vaclav   +2 more
core   +3 more sources

Tropological sigma models

Journal of High Energy Physics
Abstract With the use of mathematical techniques of tropical geometry, it was shown by Mikhalkin some twenty years ago that certain Gromov-Witten invariants associated with topological quantum field theories of pseudoholomorphic maps can be computed by going to the tropical limit of the geometries in question.
Emil Albrychiewicz, Kai-Isaak Ellers, Andrés Franco Valiente, Petr Hořava   +3 more
openaire   +3 more sources

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   +3 more sources

Ablation of LRP6 in alpha‐smooth muscle actin‐expressing cells abrogates lung inflammation and fibrosis upon bleomycin‐induced lung injury

FEBS Letters, EarlyView.
Low‐density lipoprotein receptor‐related protein 6 (LRP6) is a key receptor for the Wnt antagonist Dickkopf1 (DKK1). DKK1 protein expression is induced in a bleomycin (BLM)‐induced lung injury model. We show that DKK1 induces proinflammatory and profibrotic genes in lung fibroblasts.
Eun‐Ah Sung, Mikhail G. Dozmorov, SuJeong Song, Theingi Aung, Min Hee Park, Patricia J. Sime, Wook‐Jin Chae   +6 more
wiley   +1 more source

Combined constraints on modified Chaplygin gas model from cosmological observed data: Markov Chain Monte Carlo approach

, 2011
We use the Markov Chain Monte Carlo method to investigate a global constraints on the modified Chaplygin gas (MCG) model as the unification of dark matter and dark energy from the latest observational data: the Union2 dataset of type supernovae Ia (SNIa),
A. Dev, A.C. Pope, A.C.C. Guimaraes, A.G. Riess, A.Y. Kamenshchik, B. Feng, B. Ratra, D. Rapetti, D.J. Eisenstein, D.J. Eisenstein, D.J. Eisenstein, D.N. Spergel, E. Di Pietro, F.C. Santos, H. Spinrad, J. Dunlop, J. Simon, J. Simon, J.B. Lu, J.B. Lu, J.B. Lu, J.B. Lu, J.D. Barrow, J.R. Bond, Jianbo Lu, L. Amendola, L. Perivolaropoulos, L. Samushia, L.A. Nolan, L.X. Xu, Lixin Xu, M. Bouhmadi-Lopez, M. Hicken, M. Li, M. Makler, M. Makler, M. Szydlowski, M.C. Bento, M.C. Bento, M.L. Bedran, Molin Liu, P.T. Silva, P.X. Wu, R. Bean, R. Jimenez, R. Jimenez, R. Jimenez, R.G. Abraham, R.G. Abraham, R.R. Caldwell, S. Li, S. Nesseris, S. Nesseris, S. Nesseris, S. Nesseris, S. Perlmutter, S. Weinberg, S.W. Allen, T. Barreiro, T. Treu, T. Treu, T. Treu, U. Alam, U. Alam, U. Debnath, W. Hu, W. Hu, W. Hu, W.J. Percival, Y.G. Gong, Y.G. Gong, Y.T. Wang, Yabo Wu, Z.H. Zhu, Z.L. Yi, Z.X. Zhai   +75 more
core   +1 more source

Topological sigma models [PDF]

Communications in Mathematical Physics, 1988
A variant of the usual supersymmetric nonlinear sigma model is described, governing maps from a Riemann surfaceΣ to an arbitrary almost complex manifoldM. It possesses a fermionic BRST-like symmetry, conserved for arbitraryΣ, and obeyingQ 2=0. In a suitable version, the quantum ground states are the 1+1 dimensional Floer groups.
openaire   +3 more sources

Taurine promotes glucagon‐like peptide‐1 secretion in enteroendocrine L cells

FEBS Letters, EarlyView.
Taurine, a sulfur‐containing amino acid, is likely taken up by enteroendocrine L cells via the taurine transporter. This process increases the levels of cytosolic ATP. The increase in intracellular Ca2+ concentrations and glucagon‐like peptide‐1 secretion through membrane depolarization is caused by the closure of ATP‐sensitive potassium channels ...
Yuri Osuga, Kazuki Harada, Takuya Yamauchi, Tetsuya Kitaguchi, Masami Yokota Hirai, Mitsuharu Matsumoto, Takashi Tsuboi   +6 more
wiley   +1 more source

Spherically-symmetric non-linear sigma model: the exact solutions obtained with isometrical embedding method

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2011
The method to generate exact cosmological solutions in the frame of the spherically-symmetric non-linear sigma model offered in the present paper. This method is based on the isometrical embeddings of the target space (non-linear sigma-model fields ...
Yu. A. Svistunova, S. V. Chervon
doaj   +3 more sources

Structural Analysis of Bacillus subtilis Sigma Factors

Microorganisms, 2023
Bacteria use an array of sigma factors to regulate gene expression during different stages of their life cycles. Full-length, atomic-level structures of sigma factors have been challenging to obtain experimentally as a result of their many regions of ...
Katherine M. Collins, Nicola J. Evans, James H. Torpey, Jonathon M. Harris, Bethany A. Haynes, Amy H. Camp, Rivka L. Isaacson   +6 more
doaj   +1 more source