Results 21 to 30 of about 4,605,487 (285)
The twistor space of a quaternionic contact manifold [PDF]
, 2010 We show that the CR structure on the twistor space of a quaternionic contact structure described by Biquard is normal if and only if the Ricci curvature of the Biquard connection commutes with the endomorphisms in the quaternionic structure of the ...
Davidov, Johann +2 more
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Contact between Adjacent Structures
Journal of Structural Engineering, 1991 In this paper, the static contact forces developed between adjacent structures are studied. Activation of a unilateral contact situation between adjacent buildings can be caused by external horizontal loading, e.g., the case of a design static loading representing an earthquake motion as in the pseudostatic method of analysis for earthquake‐resistant ...
Σταυρουλακης Γεωργιος(http://users.isc.tuc.gr/~gestavroulakis) +2 more
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Sasakian structures a foliated approach
Demonstratio Mathematica, 2017 Recent renewed interest in Sasakian manifolds is due mainly to the fact that they can provide examples of generalized Einstein manifolds, manifolds which are of great interest in mathematical models of various aspects of physical phenomena.
Wolak Robert A.
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Reeb vector field of almost contact metric structure as affine motion
Дифференциальная геометрия многообразий фигур, 2022 Smooth manifold with almost contact metric structure (i. e., almost contact metric manifold) was considered in this paper. We used a modern version of Cartan’s method of external forms to conduct our study.
L.A. Ignatochkina
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Aurelia aurita (Cnidaria) oocytes' contact plate structure and development. [PDF]
PLoS ONE, 2012 One of the A. aurita medusa main mesoglea polypeptides, mesoglein, has been described previously. Mesoglein belongs to ZP-domain protein family and therefore we focused on A.aurita oogenesis.
Leonid S Adonin +2 more
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Estimating within-school contact networks to understand influenza transmission [PDF]
, 2012 Many epidemic models approximate social contact behavior by assuming random mixing within mixing groups (e.g., homes, schools and workplaces). The effect of more realistic social network structure on estimates of epidemic parameters is an open area of ...
Halloran, M. Elizabeth +3 more
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Indirect interactions influence contact network structure and diffusion dynamics [PDF]
Royal Society Open Science, 2019 Interaction patterns at the individual level influence the behaviour of diffusion over contact networks. Most of the current diffusion models only consider direct interactions, capable of transferring infectious items among individuals, to build ...
Md Shahzamal +3 more
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Orderable contact structures on Liouville-fillable contact manifolds [PDF]
Journal of Symplectic Geometry, 2015 We study the existence of positive loops of contactomorphisms on a Liouville-fillable contact manifold $( , =\ker( ))$. Previous results show that a large class of Liouville-fillable contact manifolds admit contractible positive loops. In contrast, we show that for any Liouville-fillable $( , )$ with $\dim( ) \geq 7$, there exists a Liouville ...
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Cartan Structures on Contact Manifolds [PDF]
Transactions of the American Mathematical Society, 1981 Owing to the existence of a dilatation generator of eigenvalues ± 2 , ± 1 , 0 \pm 2, \pm 1,0 the symplectic Lie algebra is considered as a | 2 | |2| -graded Lie algebra.
Burdet, G., Perrin, M.
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The Lattice Structure of L-Contact Relations
Advances in Fuzzy Systems, 2016 From the point of view of graded truth approach, we define the notion of a contact relation on the collection of all L-sets, discuss the connection to the set of all close, reflexive, and symmetric relations on all L-ultrafilters on X, and investigate ...
Xueyou Chen
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