Phase formation and structural characteristics of Cd-Pb-S nanopowder compositions produced by modification of CdS powder in a citrate-ammonia solution of a lead salt

Nanopowders obtained by modification of a cadmium sulfide powder in a citrate-ammonia solution of lead acetate have been studied by X-ray diffraction, electron microscopy, and thermal analysis. The type of crystal structure and composition of Cd-Pb-S nanopowders depend on the conditions of their synthesis. The thermoanalytical curves show a well-defined endotherm in the temperature range 284-321 C. The position of this endotherm depends on the duration of contact of a CdS powder with an aqueous solution of a lead salt. Heating nanopowders to 600 C in an argon flow leads to formation of oxygen-containing phases: lead sulfate and cadmium oxide. © 2013 Pleiades Publishing, Ltd

Observation of narrow baryon resonance decaying into pKs0pK^0_s in pA-interactions at 70GeV/c70 GeV/c with SVD-2 setup

SVD-2 experiment data have been analyzed to search for an exotic baryon state, the $\Theta^+$-baryon, in a $pK^0_s$ decay mode at $70 GeV/c$ on IHEP accelerator. The reaction $pA \to pK^0_s+X$ with a limited multiplicity was used in the analysis. The $pK^0_s$ invariant mass spectrum shows a resonant structure with $M=1526\pm3(stat.)\pm 3(syst.) MeV/c^2$ and $\Gamma < 24 MeV/c^2$. The statistical significance of this peak was estimated to be of $5.6 \sigma$. The mass and width of the resonance is compatible with the recently reported $\Theta^+$- baryon with positive strangeness which was predicted as an exotic pentaquark ($uudd\bar{s}$) baryon state. The total cross section for $\Theta^+$ production in pN-interactions for $X_F\ge 0$ was estimated to be $(30\div120) \mu b$ and no essential deviation from A-dependence for inelastic events $(\sim A^{0.7})$ was found.Comment: 8 pages, 7 figures, To be submitted to Yadernaya Fizika. v3-v5 - Some references added, minor typos correcte

Anisotropic Bose-Einstein condensates and completely integrable dynamical systems

A Gaussian ansatz for the wave function of two-dimensional harmonically trapped anisotropic Bose-Einstein condensates is shown to lead, via a variational procedure, to a coupled system of two second-order, nonlinear ordinary differential equations. This dynamical system is shown to be in the general class of Ermakov systems. Complete integrability of the resulting Ermakov system is proven. Using the exact solution, collapse of the condensate is analyzed in detail. Time-dependence of the trapping potential is allowed

Properties of Neutral Charmed Mesons in Proton--Nucleus Interactions at 70 GeV

The results of treatment of data obtained in the SERP-E-184experiment "Investigation of mechanisms of the production of charmed particles in proton-nucleus interactions at 70 GeV and their decays" by irradiating the active target of the SVD-2 facility consisting of carbon, silicon, and lead plates, are presented. After separating a signal from the two-particle decay of neutral charmed mesons and estimating the cross section for charm production at a threshold energy {\sigma}(c\v{c})=7.1 \pm 2.4(stat.) \pm 1.4(syst.) \mub/nucleon, some properties of D mesons are investigated. These include the dependence of the cross section on the target mass number (its A dependence); the behavior of the differential cross sections d{\sigma}/dpt2 and d{\sigma}/dxF; and the dependence of the parameter {\alpha} on the kinematical variables xF, pt2, and plab. The experimental results in question are compared with predictions obtained on the basis of the FRITIOF7.02 code.Comment: 9 pages, 9 figures,3 table

Cosmic Dynamics of Bose-Einstein Condensates

A dynamical correspondence is established between positively curved, isotropic, perfect fluid cosmologies and quasi-two-dimensional, harmonically trapped Bose-Einstein condensates by mapping the equations of motion for both systems onto the one-dimensional Ermakov system. Parameters that characterize the physical properties of the condensate wavepacket, such as its width, momentum and energy, may be identified with the scale factor, Hubble expansion parameter and energy density of the universe, respectively. Different forms of cosmic matter correspond to different choices for the time-dependent trapping frequency of the condensate. The trapping frequency that mimics a radiation-dominated universe is determined.Comment: 12 pages, no figures. Extended discussion. In Press, Classical and Quantum Gravit

Natural Principles of Politics and Power: are they Relevant Today?

Политика и отправление государственной власти обычно считаются исключительно рациональными видами деятельности человека, определяемыми спектром целей, задач и проблем, которые решает общество в целом. Однако в критические, переломные моменты истории в этих интеллектуальных сферах проявляются очевиднее и масштабнее природные, естественные факторы, понимание значения и роли которых помогает не только улучшить прогноз важных общественных событий и трендов, но и эффективнее ими управлять.Politics and the exercise of state power are usually considered exclusively rational human activities, determined by the range of goals, objectives and problems that society as a whole solves. However, at critical, turning points in history, natural factors manifest themselves on a larger scale in these intellectual spheres, understanding the significance and role of which helps not only to better predict social events and trends, but also to manage them more effectively

Personal Sovereignty: how to Protect Yourself from Mind Manipulation

Статья поступила в редакцию 26.10.2023 г.В статье раскрываются основания зависимости индивидуального сознания от сознания общественного, такие как отсутствие тождества их содержания, разные объемы и динамика, «молчаливый» характер бытия отдельного индивида, господство в актуальной культуре социальных способов понимания и чувствования реальности, смысловой интерпретации общественных фактов и событий. Утверждается, что сегодня для противостояния агрессии манипуляций сознанием человеку необходимо осваивать технику духовной безопасности, включающую конкретные приемы защиты мыслительной и эмоциональной автономии его личности.The article reveals the reasons for the dependence of individual consciousness on social consciousness, lack of identity regarding the content, the “silent” nature of life activity of an individual, the dominance culture of social ways of understanding and feeling reality in the current, and meaningful interpretation of social facts and events. It is argued that today, in order to resist the aggression of consciousness manipulation, a person needs to master the technique of spiritual security, which includes specific techniques to protect the thought and emotional autonomy of his personality