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Showing 1 to 12 of 12 entries
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Dynamics of two-dimensional coherent structures in nonlocal nonlinear media.

Physical review. E, Statistical, nonlinear, and soft matter physics

Yakimenko AI, Lashkin VM, Prikhodko OO.
PMID: 16906995
Phys Rev E Stat Nonlin Soft Matter Phys. 2006 Jun;73(6):066605. doi: 10.1103/PhysRevE.73.066605. Epub 2006 Jun 06.

We study stability and dynamics of the single cylindrically symmetric solitary structures and dipolar solitonic molecules in spatially nonlocal media. The main properties of the solitons, vortex solitons, and dipolar solitons are investigated analytically and numerically. The vortices and...

Coherent and incoherent components of a synchrotron radiation spot produced by separate capillaries.

Applied optics

Dabagov SB, Marcelli A, Murashova VA, Svyatoslavsky NL, Fedorchuk RV, Yakimenko MN.
PMID: 18349902
Appl Opt. 2000 Jul 01;39(19):3338-43. doi: 10.1364/ao.39.003338.

We discuss soft-x-ray focusing properties of separate capillaries. It is shown that a nonnegligible fraction of the synchrotron radiation beam transmitted by the capillary is modal. Experimental and theoretical data are discussed to explain the superposition pattern of x...

Stable vortex solitons in nonlocal self-focusing nonlinear media.

Physical review. E, Statistical, nonlinear, and soft matter physics

Yakimenko AI, Zaliznyak YA, Kivshar Y.
PMID: 16089812
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Jun;71(6):065603. doi: 10.1103/PhysRevE.71.065603. Epub 2005 Jun 30.

We reveal that spatially localized vortex solitons become stable in self-focusing nonlinear media when the vortex symmetry-breaking azimuthal instability is eliminated by a nonlocal nonlinear response. We study the main properties of different types of vortex beams and discuss...

Josephson oscillations of edge quasi-solitons in a photonic-topological coupler.

Optics letters

Bazhan N, Malomed B, Yakimenko A.
PMID: 34913919
Opt Lett. 2021 Dec 15;46(24):6067-6070. doi: 10.1364/OL.445298.

We introduce a scheme of a photonic coupler built of two parallel topological-insulator slab waveguides with the intrinsic Kerr nonlinearity, separated by a lattice spacing. Josephson oscillations (JOs) of a single edge quasi-soliton (QS) created in one slab, and...

[The positional specificity of individual triglycerides-substrates for lipase action. The oleic triglycerides of palm oil, palmitic triglycerides of milk, ions of calcium and magnesium.].

Klinicheskaia laboratornaia diagnostika

Titov VN, Aripovsky AV, Samokhodskaya LM, Kotlovsky MV, Yakimenko AV, Kukharchuk VV.
PMID: 31536689
Klin Lab Diagn. 2016;61(12):800-809. doi: 10.18821/0869-2084-2016-61-12-800-809.

The counter-insulin effect of surplus of palmitic fatty acid in food is implemented under: a) formation in vivo of palmitic type of fatty acids metabolism with deficiency of substrate for ATP synthesis and permanent shortage of energy for accomplishment...

[The positional isomers of palmitic and oleic triglycerides, lipolysis, conformation of apoB-100, formation of apoE/B-100 ligand and absorption of lipoproteins of very low density by insulin-dependent cells under action of statins.].

Klinicheskaia laboratornaia diagnostika

Titov VN, Yakimenko AV, Kotlovskii MY, Aripovskii AV, Smirnov GP, Malishev PP.
PMID: 31532941
Klin Lab Diagn. 2016;61(11):736-743. doi: 10.18821/0869-2084-2016-61-11-736-743.

The study was carried out to trace back quantitative alterations of positional isomers, oleic and palmitic triglycerides and individual fatty acids in blood serum. After two weeks of taking of Simvastatin (40, 80 mg), analysis of blood serum established...

Observation of Interference Effects at the Focus of an X-ray Lens.

Journal of synchrotron radiation

Dabagov SB, Kumakhov MA, Nikitina SV, Murashova VA, Fedorchuk RV, Yakimenko MN.
PMID: 16714804
J Synchrotron Radiat. 1995 May 01;2:132-5. doi: 10.1107/S0909049595003864.

During an experiment on synchrotron radiation focusing with a capillary lens, an interference structure was observed at the focal spot of the lens, despite the fact that the lens capillary diameter is about a million times greater than the...

Distribution of superconducting energy gaps in GdBa2Cu3O7 obtained from point-contact spectroscopy.

Physical review. B, Condensed matter

Akimenko AI, Goll G, Gudimenko VA, Löhneysen Hv.
PMID: 10002328
Phys Rev B Condens Matter. 1992 Sep 01;46(10):6409-6412. doi: 10.1103/physrevb.46.6409.

No abstract available.

Spontaneous and engineered transformations of topological structures in nonlinear media with gain and loss.

Physical review. E

Kochetov BA, Chelpanova OG, Tuz VR, Yakimenko AI.
PMID: 31962499
Phys Rev E. 2019 Dec;100(6):062202. doi: 10.1103/PhysRevE.100.062202.

In contrast to conservative systems, in nonlinear media with gain and loss the dynamics of localized topological structures exhibit many unique features that can be controlled externally. We propose a robust mechanism to perform topological transformations changing characteristics of...

Two-dimensional solitons and vortices in normal and anomalous dispersive media.

Physical review. E, Statistical, nonlinear, and soft matter physics

Davydova TA, Yakimenko AI, Zaliznyak YA.
PMID: 12636817
Phys Rev E Stat Nonlin Soft Matter Phys. 2003 Feb;67(2):026402. doi: 10.1103/PhysRevE.67.026402. Epub 2003 Feb 05.

We study solitons and vortices described by the (2+1)-dimensional fourth-order generalized nonlinear Schrödinger equation with cubic-quintic nonlinearity. Necessary conditions for the existence of such structures are investigated analytically using conservation laws and asymptotic behavior of localized solutions. We derive...

Bright vector solitons in cross-defocusing nonlinear media.

Physical review. E, Statistical, nonlinear, and soft matter physics

Yakimenko AI, Prikhodko OO, Vilchynskyi SI.
PMID: 20866753
Phys Rev E Stat Nonlin Soft Matter Phys. 2010 Jul;82(1):016605. doi: 10.1103/PhysRevE.82.016605. Epub 2010 Jul 28.

We study two-dimensional soliton-soliton vector pairs in media with self-focusing nonlinearities and defocusing cross interactions. The general properties of the stationary states and their stability are investigated. The different scenarios of instability are observed using numerical simulations. The quasistable...

Josephson oscillations of edge quasi-solitons in a photonic-topological coupler.

Optics letters

Bazhan N, Malomed B, Yakimenko A.
PMID: 34913919
Opt Lett. 2021 Dec 15;46(24):6067-6070. doi: 10.1364/OL.445298.

We introduce a scheme of a photonic coupler built of two parallel topological-insulator slab waveguides with the intrinsic Kerr nonlinearity, separated by a lattice spacing. Josephson oscillations (JOs) of a single edge quasi-soliton (QS) created in one slab, and...

Showing 1 to 12 of 12 entries