Results 41 to 50 of about 612 (101)

M-theory Compactifications on Manifolds with G2 Structure

, 2004
In this paper we study M-theory compactifications on manifolds of G2 structure. By computing the gravitino mass term in four dimensions we derive the general form for the superpotential which appears in such compactifications and show that beside the ...
Acharya B S, Acharya B S, Acharya B Witten E, Alexander S Becker K Becker M Dasgupta K Knauf A Tatar R, Andrei Micu, Atiyah M, Barrett A B Lukas A, Beasley C, Becker K, Becker K, Becker K Becker M Dasgupta K Tatar R, Becker M, Becker M Dasgupta K, Behrndt K, Behrndt K Cvetic M, Behrndt K Cvetic M, Cardoso G L, Carlos B de Lukas A Morris S, Cascales J F G, Cvetic M Shiu G Uranga A M, Dall'Agata G, Frey A R, Gauntlett J P, Gauntlett J P, Gauntlett J P Martelli D Sparks J Waldram D, Grana M, Gurrieri S, Gurrieri S, House T Lukas A, Joyce D D, Kachru S, Kaste P, Kaste P, Lukas A, Lukas A Saffin P M, Martelli D, Mayer C Mohaupt T, Micu A, Serone M, Thomas House, Wess J, Witten E, Witten E   +42 more
core   +3 more sources

A transferable approach for quantifying benthic fish sizes and densities in annotated underwater images

Methods in Ecology and Evolution, Volume 16, Issue 1, Page 145-159, January 2025.
Abstract Benthic fishes are a common target of scientific monitoring but are difficult to quantify because of their close association to bottom habitats that are hard to access. Advances in image‐acquisition technologies, machine vision and deep learning have made capturing and quantifying fishes with cameras increasingly feasible.
Peter C. Esselman, Shadi Moradi, Joseph Geisz, Christopher Roussi   +3 more
wiley   +1 more source

Rigidity theorems of Lagrangian submanifolds in the homogeneous nearly K\"ahler $\mathbb{S}^6(1)$

, 2019
In this paper, we study Lagrangian submanifolds of the homogeneous nearly K\"ahler $6$-dimensional unit sphere $\mathbb{S}^6(1)$. As the main result, we derive a Simons' type integral inequality in terms of the second fundamental form for compact ...
Hu, Zejun, Yin, Bangchao, Yin, Jiabin
core   +1 more source

Generic Riemannian Submersions from nearly K¨aehler Manifolds

Journal of the Tensor Society, 2007
We study generic Riemannian submersions from nearly K¨aehler manifolds onto Riemannian manifolds. We investigate conditions for the integrability of various distributions arising for generic Riemannian submersions and also obtain conditions for leaves to be totally geodesic foliations.
Kaushal, Rupali, Sachdeva, Rashmi, Kumar, Rakesh, Nagaich, R. K.   +3 more
openaire   +2 more sources

Effects of pre‐treatment, historical age, and sample characteristics on the stable isotope analyses of killer whale (Orcinus orca) bone

Rapid Communications in Mass Spectrometry, Volume 38, Issue 19, 15 October 2024.
Rationale Stable isotope analysis of bone provides insight into animal foraging and allows for ecological reconstructions over time, however pre‐treatment is required to isolate collagen. Pre‐treatments typically consist of demineralization to remove inorganic components and/or lipid extraction to remove fats, but these protocols can differentially ...
Kelly R. Bowen, Carolyn M. Kurle
wiley   +1 more source

What Is the Ideal Dimension of Law?

Ratio Juris, Volume 37, Issue 3, Page 210-229, September 2024.
Abstract Various authors have claimed that law has an ideal dimension owed to a claim to correctness. Against this thesis, this article argues that there are several ideal dimensions of law, namely, a moral, a legal, and an ontological one. All of them are independent of a claim to correctness.
Lorenz Kaehler
wiley   +1 more source

Nongeometric Flux Compactifications

, 2005
We investigate a simple class of type II string compactifications which incorporate nongeometric "fluxes" in addition to "geometric flux" and the usual H-field and R-R fluxes. These compactifications are nongeometric analogues of the twisted torus.
A. Dabholkar, A.R. Frey, B. de Carlos, Brian Wecht, C.M. Hull, C.M. Hull, C.M. Hull, D.-E. Diaconescu, D.-E. Diaconescu, D.S. Freed, E. Witten, G. Villadoro, G.L. Cardoso, G.W. Moore, I.V. Lavrinenko, J. de Boer ., J. Gray, J. Scherk, J. Shelton, Jessie Shelton, K. Becker, K. Becker, K. Dasgupta, M. Becker, M. Grana, M. Grana, M. Serone, M.B. Schulz, N. Hitchin, N. Kaloper, O. DeWolfe, O. DeWolfe, P. Bouwknegt, P. Horava, P.G. Camara, P.K. Tripathy, R. Minasian, S. Gurrieri, S. Hellerman, S. Kachru, S. Kachru, S. Kachru, V. Mathai, V. Mathai, V. Mathai, Washington Taylor   +45 more
core   +4 more sources

The convenience yield under commodity financialization

Journal of Futures Markets, Volume 44, Issue 4, Page 631-652, April 2024.
Abstract A number of papers have dealt with commodity financialization finding strong evidence for its existence and its effect on commodity prices and volatility. We chose convenience yield (CY) to study the effect of commodity financialization based on the theory of storage and on the argument that CY resembles a call option.
Nikolaos T. Milonas, Evangelia K. Photina   +1 more
wiley   +1 more source

SU(3)-instantons and $G_2, Spin(7)$-heterotic string solitons

, 2005
Necessary and sufficient conditions to the existence of a hermitian connection with totally skew-symmetric torsion and holonomy contained in SU(3) are given.
Agricola, Alessandrini, Alexandrov, Alexandrov, Apostolov, Becker, Belgun, Bismut, Bonan, Bryant, Bryant, Cabrera, Cabrera, Cardoso, Carrin, Corrigan, Fernandez, Fernandez, Fernández, Freedman, Friedrich, Friedrich, Friedrich, Friedrich, Fubini, Gauduchon, Gauntlett, Gauntlett, Gibbons, Gillard, Goldstein, Gray, Gray, Gurrieri, Gutowski, Günaydin, Harvey, Harvey, Ivanov, Ivanov, Joyce, Joyce, Kachru, Kirichenko, Kovalev, Malcev, Petar Ivanov, Stefan Ivanov, Strominger, Ugarte, Wit   +50 more
core   +1 more source

Yang-Mills Flows on Nearly Kähler Manifolds and G 2-Instantons [PDF]

Communications in Mathematical Physics, 2010
We consider Lie(G)-valued G-invariant connections on bundles over spaces G/H, RxG/H and R^2xG/H, where G/H is a compact nearly Kaehler six-dimensional homogeneous space, and the manifolds RxG/H and R^2xG/H carry G_2- and Spin(7)-structures, respectively.
Harland, Derek, Ivanova, Tatiana A., Lechtenfeld, Olaf, Popov, Alexander D.   +3 more
openaire   +3 more sources