Results 61 to 70 of about 11,192,205 (154)
Conformal Killing forms on Riemannian manifolds [PDF]
arXiv, 2002 Conformal Killing forms are a natural generalization of conformal vector fields on Riemannian manifolds. They are defined as sections in the kernel of a conformally invariant first order differential operator. We show the existence of conformal Killing forms on nearly Kaehler and weak G_2-manifolds.
arxiv
Higher-degree Dirac currents of twistor and Killing spinors in supergravity theories [PDF]
, 2015 We show that higher degree Dirac currents of twistor and Killing spinors correspond to the hidden symmetries of the background spacetime which are generalizations of conformal Killing and Killing vector fields respectively.
Ö. Açık, Ü. Ertem
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Prescription drones: On the techno-biopolitical regimes of contemporary ‘ethical killing’
, 2016 As military technologies progress at a pace that challenges human cognitive and reasoning capacities, it is becoming ever more difficult to appraise the ethics of their use.
E. Schwarz
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Copper Reduction and Contact Killing of Bacteria by Iron Surfaces
Applied and Environmental Microbiology, 2015 The well-established killing of bacteria by copper surfaces, also called contact killing, is currently believed to be a combined effect of bacterial contact with the copper surface and the dissolution of copper, resulting in lethal bacterial damage. Iron
S. Mathews, Ranjeet Kumar, M. Solioz
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Conformal Killing forms on nearly Kähler manifolds [PDF]
arXiv, 2019 We study conformal Killing forms on compact 6-dimensional nearly K\"ahler manifolds. Our main result concerns forms of degree 3. Here we give a classification showing that all conformal Killing 3-forms are linear combinations of $d \omega$ and its Hodge dual $* d\omega$ where $\omega$ is the fundamental 2-form of the nearly K\"ahler structure.
arxiv
Short-Form Bomanins Mediate Humoral Immunity in Drosophila
Journal of Innate Immunity, 2018 The Bomanins (Boms) are a family of a dozen secreted peptides that mediate the innate immune response governed by the Drosophila Toll receptor. We recently showed that deleting a cluster of 10 Bom genes blocks Toll-mediated defenses against a range of ...
S. A. Lindsay +2 more
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Transverse conformal Killing forms on Kähler foliations
Journal of Geometry and Physics, 2015 On a closed, connected Riemannian manifold with a K hler foliation of codimension $q=2m$, any transverse Killing $r\ (\geq 2)$-form is parallel (S. D. Jung and M. J. Jung [\ref{JJ2}], Bull. Korean Math. Soc. 49 (2012)). In this paper, we study transverse conformal Killing forms on K hler foliations and prove that if the foliation is minimal, then for
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Journal of Immunology, 2007 To investigate the evolution and immune function of C-type lectin in amphioxus, the primitive representative of the chordate phylum, we identified three C-type lectins consisting solely of a carbohydrate recognition domain and N-terminal signal peptide ...
Yanhong Yu +11 more
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Normal Conformal Killing Forms
, 2004 We introduce in this paper normal twistor equations for differential forms and study their solutions, the so-called normal conformal Killing forms. The twistor equations arise naturally from the canonical normal Cartan connection of conformal geometry. Reductions of its holonomy are related to solutions of the normal twistor equations.
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Higher-dimensional lifts of Killing–Yano forms with torsion [PDF]
Classical and Quantum Gravity, 2016 Using a Kaluza-Klein-type lift, it is shown how Killing-Yano forms with torsion can remain symmetries of a higher-dimensional geometry, subject to an algebraic condition between the Kaluza-Klein field strength and the Killing-Yano form. The lift condition's significance is highlighted, and is satisfied by examples of black holes in supergravity.
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