Coherent Dicke Narrowing of Absorption Spectra,Collapse and Revival: Second-Derivative Processing

Journal of Experimental and Theoretical Physics - The coherent Dicke narrowing (CDN) of the absorption spectrum in an Rb, Cs, K, or Na atomic vapor column of thickness L = (2n + 1)λ/2 (when n...     

Magnetically Induced Transitions in Spectral Vicinity of the D2 Line of Cs Atoms: Giant Growth of Transition Probabilities and Different Asymptotic Behavior in Increasing Transverse Magnetic Field

Optics and Spectroscopy - Two types of magnetically induced (MI) transitions in cesium atoms were studied experimentally and theoretically. The MI transitions are forbidden in the absence of...     

Formation of Narrow-Band N-Type Optical Resonance in Vapors of Potassium Atoms

Journal of Applied Spectroscopy - An N-type optical resonance that formed in the Λ-system of potassium atoms (D1 lines) using two CW narrow-band lasers and a spectroscopic cell with a length...     

Electrosynthesis of nanocomposite polymer coatings based on 1-vinyl-1,2,4-triazole–crotonaldehyde copolymers

Russian Journal of Applied Chemistry - The possibility of electrochemical preparation of metal–polymer nanocomposites and coatings on pure iron and steel electrode by combining the...     

Nonexistence of Levi-degenerate hypersurfaces of constant signature in CP n

Let M be a smooth hypersurface of constant signature in CP ⁿ , n≥3. We prove the regularity for on M in bidegree (0,1). As a consequence, we show that there exists no smooth hypersurface in CP ⁿ , n≥3, whose Levi form has at least two zero-eigenvalues.     

Asymptotics for the logarithm of the number of (k, l)-sum-free sets in groups of prime order

The subset A of a group G is (k, l)-sum-free if x ₁ + ?? + x _k ? x _{k + 1} ? ?? ? x _k+l?1 does not belong to the set A for any x ₁, ??, x _k+l?1 ?? A. Asymptotics for the logarithm of the number of sets (k, l)-sum-free in groups of prime order is obtained.     

General theory of micropolar elastic thin shells

The paper formulates general hypotheses of micropolar elastic thin shells that are given asymptotic validation. Using these hypotheses and three-dimensional Cosserat (micropolar, asymmetric) theory of elasticity, general two-dimensional applied models of micropolar elastic thin shells with independent displacement and rotation fields, constrained rotation and low shear rigidity are constructed to suit dimensionless physical parameters of the shell material. The constructed micropolar shell models take into complete account transverse shear strain and related strain. Models of micropolar elastic thin plates and beams are particular cases of the constructed micropolar shell models. An axially symmetric stress-strain state problem of a hinged cylindrical micropolar shell is considered. Numerical analysis is used to demonstrate effective strength and rigidity characteristics of micropolar elastic shells.     

Synthesis and Antibacterial Activity of New Oxadiazolylbenzodioxane Derivatives

Russian Journal of Organic Chemistry - Reactions of 5-(1,4-benzodioxan-2-yl)-1,3,4-oxadiazole-2-thiol with N-substituted chloroacetamides gave a series of the corresponding derivatives at the...