Volume element structure and roton-maxon-phonon excitations in superfluid helium beyond the Gross-Pitaevskii approximation

We propose a theory which deals with the structure and interactions of volume elements in liquid helium II. The approach consists of two nested models linked via parametric space. The short-wavelength part describes the interior structure of the fluid element using a non-perturbative approach based on the logarithmic wave equation; it suggests the Gaussian-like behaviour of the element's interior density and interparticle interaction potential. The long-wavelength part is the quantum many-body theory of such elements which deals with their dynamics and interactions. Our approach leads to a unified description of the phonon, maxon and roton excitations, and has noteworthy agreement with experiment: with one essential parameter to fit we reproduce at high accuracy not only the roton minimum but also the neighboring local maximum as well as the sound velocity and structure factor.Comment: 9 pages, 6 figure

Structural Characteristics and Thermophysical Properties of Complex Ceramic Oxides in the System Dy2O3–HfO2

The structure and thermophysical properties of materials formed in the system Dy2O3–HfO2 (molar ratio 1 : 3 to 3 : 1) as a result of isothermal firing of x-ray amorphous mixed hydroxides at temperature to 1600°C are investigated. It is shown that for ratios 1 : 3 to 1 : 1 the crystallization process results in the formation of single-phase solid solutions with the structure of defective fluorite and marked nonequivalence of the parameters of the local environment of the Dy and Hf atoms. It is determined that the ceramic based on dysprosium hafnate (Dy2O3: HfO2 = 1 : 1) possesses low, practically temperature independent (to 800°C), thermal conductivity about 1.4 W/(m · K). © 2016, Springer Science+Business Media New York

Structural Characteristics and Thermophysical Properties of Complex Ceramic Oxides in the System Dy2O3–HfO2

The structure and thermophysical properties of materials formed in the system Dy2O3–HfO2 (molar ratio 1 : 3 to 3 : 1) as a result of isothermal firing of x-ray amorphous mixed hydroxides at temperature to 1600°C are investigated. It is shown that for ratios 1 : 3 to 1 : 1 the crystallization process results in the formation of single-phase solid solutions with the structure of defective fluorite and marked nonequivalence of the parameters of the local environment of the Dy and Hf atoms. It is determined that the ceramic based on dysprosium hafnate (Dy2O3: HfO2 = 1 : 1) possesses low, practically temperature independent (to 800°C), thermal conductivity about 1.4 W/(m · K). © 2016, Springer Science+Business Media New York

Influence of prior treatment on austenite grain formation in 35KhN2MFA steel

15.00; Translated from Russian (Izv. Vyssh. Uchebn. Zaved., Chern. Metall. 1988 (2) p. 90-92)Available from British Library Document Supply Centre- DSC:9022.06(BISI-Trans--26816)T / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Prospects of non-drug approaches to Alzheimer's disease

Despite the urgency of the problem of prevention and treatment of neurodegenerative processes underlying Alzheimer's disease (AD) and other severe disorders of the central nervous system, therapeutic and prophylactic potential of drugs is yet insufficient. Numerous adverse effects of the drugs, which might improve cognitive function in patients with AD substantiate serious consideration of measures enhancing adaptive potential and mobilizing self-defense of the body. It is clear now that endogenous defense systems of the brain can limit progression of AD long after the onset of the disease. The measures mobilizing the self-defense include administration of natural adaptogens and various types of adaptation, such as adaptation to dietary restrictions, promotion of physical and mental activity, and adaptation to hypoxia. This review presents data supporting a hypothesis that non-drug activation of self-defense of the body can prevent cognitive decline induced by neurodegenerative processes in the brain by targeting key points of AD pathogenesis

Prospects of non-drug approaches to Alzheimer's disease

Despite the urgency of the problem of prevention and treatment of neurodegenerative processes underlying Alzheimer's disease (AD) and other severe disorders of the central nervous system, therapeutic and prophylactic potential of drugs is yet insufficient. Numerous adverse effects of the drugs, which might improve cognitive function in patients with AD substantiate serious consideration of measures enhancing adaptive potential and mobilizing self-defense of the body. It is clear now that endogenous defense systems of the brain can limit progression of AD long after the onset of the disease. The measures mobilizing the self-defense include administration of natural adaptogens and various types of adaptation, such as adaptation to dietary restrictions, promotion of physical and mental activity, and adaptation to hypoxia. This review presents data supporting a hypothesis that non-drug activation of self-defense of the body can prevent cognitive decline induced by neurodegenerative processes in the brain by targeting key points of AD pathogenesis

Inclusive production of neutral strange particles in {Mathematical expression} interactions at 32 GeV/c

The inclusive Kn, ¶, and {Mathematical expression} production has been studied in a {Mathematical expression} experiment performed in the Mirabelle bubble chamber at an incident beam momentum of 32.1 GeV/c. Total, topological and differential cross sections are presented and compared with those obtained at other energies. The invariant structure functions have been parametrised in the fragmentation region by a power law and are consistent with the expectations based on quark counting rules. © 1981 Springer-Verlag.SCOPUS: ar.jinfo:eu-repo/semantics/publishe