Results 31 to 40 of about 836,642 (337)

Progress for the development of antibacterial surface based on surface modification technology

open access: yesSupramolecular Materials, 2022
With the increasing requirement for antibacterial surface especially in biomedical apparatus, constructing the new material surface with bactericidal activity for combating the infection caused by multi-resistant microbials possesses great significance ...
Lin Huang, Chuan-Jun Liu
doaj   +1 more source

Computation of the conformal algebra of 1+3 decomposable spacetimes [PDF]

open access: yes, 1998
The conformal algebra of a 1+3 decomposable spacetime can be computed from the conformal Killing vectors (CKV) of the 3-space. It is shown that the general form of such a 3-CKV is the sum of a gradient CKV and a Killing or homothetic 3-vector.
Capocci M S   +7 more
core   +2 more sources

Killing superalgebras for lorentzian five-manifolds

open access: yesJournal of High Energy Physics, 2021
We calculate the relevant Spencer cohomology of the minimal Poincaré superalgebra in 5 spacetime dimensions and use it to define Killing spinors via a connection on the spinor bundle of a 5-dimensional lorentzian spin manifold.
Andrew Beckett   +1 more
doaj   +1 more source

A Criminological Study of the Meseritz-Obrawalde Nurses During the Second Euthanasia Phase

open access: yesContemporary Challenges, 2023
The euthanasia programme was established by the Nazi government in 1939 and lasted until the end of the Second World War in 1945. The programme took form as either killing centres or psychiatric institutions, situated all over Nazi Germany and its ...
Lilli Mathilde Sofie Wolland Blomberg
doaj   +1 more source

Killing spinor-valued forms and the cone construction [PDF]

open access: yesArchivum Mathematicum, 2016
On a pseudo-Riemannian manifold $\mathcal{M}$ we introduce a system of partial differential Killing type equations for spinor-valued differential forms, and study their basic properties. We discuss the relationship between solutions of Killing equations on $\mathcal{M}$ and parallel fields on the metric cone over $\mathcal{M}$ for spinor-valued forms.
Somberg, Petr, Zima, Petr
openaire   +3 more sources

On the Tachibana numbers of closed manifolds with pinched negative sectional curvature

open access: yesДифференциальная геометрия многообразий фигур, 2020
Conformal Killing form is a natural generalization of con­formal Killing vector field. These forms were exten­si­vely studied by many geometricians. These considerations we­re motivated by existence of various applications for the­se forms.
S.E. Stepanov, I. I. Tsyganok
doaj   +1 more source

Killing vector fields and harmonic forms [PDF]

open access: yesTransactions of the American Mathematical Society, 1974
The paper is concerned with harmonic ( p , q ) (p,q) -forms on compact Kähler manifolds which admit Killing vector fields with discrete zero sets. Let h p , q {h^{p,q}} denote the dimension of the space of ...
openaire   +1 more source

Generalized hidden symmetries and the Kerr-Sen black hole [PDF]

open access: yes, 2010
We elaborate on basic properties of generalized Killing-Yano tensors which naturally extend Killing-Yano symmetry in the presence of skew-symmetric torsion.
Houri, T   +3 more
core   +2 more sources

Euclidean supersymmetric solutions with the self-dual Weyl tensor

open access: yesPhysics Letters B, 2017
We explore the Euclidean supersymmetric solutions admitting the self-dual gauge field in the framework of N=2 minimal gauged supergravity in four dimensions.
Masato Nozawa
doaj   +1 more source

Bacterial killing by complement requires direct anchoring of membrane attack complex precursor C5b-7.

open access: yesPLoS Pathogens, 2020
An important effector function of the human complement system is to directly kill Gram-negative bacteria via Membrane Attack Complex (MAC) pores. MAC pores are assembled when surface-bound convertase enzymes convert C5 into C5b, which together with C6 ...
Dennis J Doorduijn   +7 more
doaj   +1 more source

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