On the low-temperature lattice thermal transport in nanowires

We propose a theory of low temperature thermal transport in nano-wires in the regime where a competition between phonon and flexural modes governs the relaxation processes. Starting with the standard kinetic equations for two different types of quasiparticles we derive a general expression for the coefficient of thermal conductivity. The underlying physics of thermal conductance is completely determined by the corresponding relaxation times, which can be calculated directly for any dispersion of quasiparticles depending on the size of a system. We show that if the considered relaxation mechanism is dominant, then at small wire diameters the temperature dependence of thermal conductivity experiences a crossover from $T^{1/2}$ to $T^3$-dependence. Quantitative analysis shows reasonable agreement with resent experimental results.Comment: 12 pages, 3 eps figure

Cholera: Epidemiological Situation around the World in 2005-2014, and Prognosis for 2015

Cholera epidemiological situation around the world (2005-2014) has been assessed. Distribution of infection in the territory of African, Asian, and American countries, as well as in the Caribbean Region has been shown. Interstate and inter-continental importations of cholera in Europe, Australia, and America, including USA and Canada have taken place during this period. Epidemic process is spatially disseminated (with involvement and affection of new countries and administrative territories) and temporally chronic (America, the Caribbean Region; Africa) due to occurring of natural or social emergency situations. Alongside epidemics and outbreaks of the disease, caused by genetically altered variants of V. cholerae O1 El Tor and strains with multiple drug resistance, outbreaks with isolation of clinical strains of V. cholerae O139 serogroup take place in the Southeast Asia (China) on an annual basis. The forecast for 2015, as regards cholera in the world, stays unfavorable, which in its turn allows for the possibility to import this infection in the territory of the Russian Federation

Exploring new frontiers in the pulsed power laboratory: Recent progress

One of the most fundamental processes in the Universe, nucleosynthesis of elements drives energy production in stars as well as the creation of all atoms heavier than hydrogen. To harness this process and open new ways for energy production, we must recreate some of the extreme conditions in which it occurs. We present results of experiments using a pulsed power facility to induce collective nuclear interactions producing stable nuclei of virtually every element in the periodic table. A high-power electron beam pulse striking a small metallic target is used to create the extreme dynamic environment. Material analysis studies detect an anomalously high presence of new chemical elements in the remnants of the exploded target supporting theoretical conjectures of the experiment. These results provide strong motivation to continue our research looking for additional proofs that heavy element nucleosynthesis is possible in pulsed power laboratory