Quantum tunneling between paramagnetic and superconducting states of a nanometer-scale superconducting grain placed in a magnetic field

We consider the process of quantum tunneling between the superconducting and paramagnetic states of a nanometer-scale superconducting grain placed in a magnetic field. The grain is supposed to be coupled via tunneling junction to a normal metallic contact that plays a role of the spin reservoir. Using the instanton method we find the probability of the quantum tunneling process and express it in terms of the applied magnetic field, order parameter of the superconducting grain and conductance of the tunneling junction between the grain and metallic contact

OPTIMIZATION OF METHODS OF SURGICAL TREATMENT OF CHRONIC LARYNGITIS, LARYNX PRE-MALIGNANT CONDITIONS

The aim of the research was to optimize the existing methods of surgical treatment of chronic laryngitis, obligate and facultative pre-malignant conditions of the larynx. Surgical treatment of patients with chronic laryngitis, obligate and facultative pre-malignant conditions of the larynx treated in the department of otolaryngology of Municipal Clinical Hospital N 1 of Novokuznetsk and in the department of otolaryngology of Regional Clinical Hospital of War Veterans of Kemerovo during 2009-2012 was conducted. Patients of thefirstgroup had endolaryngeal surgery with direct microlaryngoscopy using surgical microscope and microsurgical tools, patients of the second groups - with indirect laryngoscopy. Assessment of the results of surgical treatment was carried out on the basis of the re-examination of patients in one year (surveys, examination and fibrolaryngoscopy). It was established that use of direct microlaryngoscopy with surgical microscope and microsurgical tools with staining of changed parts of larynx mucous membrane allowed to achieve better visualization when conducting surgical treatment and as a result to reduce the percentage of patients with the development cancerous process in the larynx significantly. Comparison of treatment outcomes in two groups with and without use of microsurgical technique confirms the reliability of this conclusion

Instanton approach to the Langevin motion of a particle in a random potential

We develop an instanton approach to the non-equilibrium dynamics in one-dimensional random environments. The long time behavior is controlled by rare fluctuations of the disorder potential and, accordingly, by the tail of the distribution function for the time a particle needs to propagate along the system (the delay time). The proposed method allows us to find the tail of the delay time distribution function and delay time moments, providing thus an exact description of the long-time dynamics. We analyze arbitrary environments covering different types of glassy dynamics: dynamics in a short-range random field, creep, and Sinai's motion.Comment: 4 pages, 1 figur

Thermal transport in granular metals

We study the electron thermal transport in granular metals at large tunnel conductance between the grains, $g_T \gg 1$ and not too low a temperature $T > g_T\delta$, where $\delta$ is the mean energy level spacing for a single grain. Taking into account the electron-electron interaction effects we calculate the thermal conductivity and show that the Wiedemann-Franz law is violated for granular metals. We find that interaction effects suppress the thermal conductivity less than the electrical conductivity.Comment: Replaced with published versio

Hall effect in quasi one-dimensional organic conductors

We study the Hall effect in a system of weakly coupled Luttinger Liquid chains, using a Memory function approach to compute the Hall constant in the presence of umklapp scattering along the chains. In this approximation, the Hall constant decomposes into two terms: a high-frequency term and a Memory function term. For the case of zero umklapp scattering, where the Memory function vanishes, the Hall constant is simply the band value, in agreement with former results in a similar model with no dissipation along the chains. With umklapp scattering along the chains, we find a power-law temperature dependance of the Hall constant. We discuss the applications to quasi 1D organic conductors at high temperatures.Comment: Proceedings of the ISCOM conference "Sixth International Symposium on Crystalline Organic Metals, Superconductors, and Ferromagnets", Key West, Florida, USA (Sept. 2005), to be plublished in the Journal of Low Temperature Physic

Hall Effect in a Quasi-One-Dimensional System

We consider the Hall effect in a system of weakly coupled one-dimensional chains with Luttinger interaction within each chain. We construct a perturbation theory in the inter-chain hopping term and find that there is a power law dependence of the Hall conductivity on the magnetic field with an exponent depending on the interaction constant. We show that this perturbation theory becomes valid if the magnetic field is sufficiently large.Comment: 20 page

Order via Nonlinearity in Randomly Confined Bose Gases

A Hartree-Fock mean-field theory of a weakly interacting Bose-gas in a quenched white noise disorder potential is presented. A direct continuous transition from the normal gas to a localized Bose-glass phase is found which has localized short-lived excitations with a gapless density of states and vanishing superfluid density. The critical temperature of this transition is as for an ideal gas undergoing Bose-Einstein condensation. Increasing the particle-number density a first-order transition from the localized state to a superfluid phase perturbed by disorder is found. At intermediate number densities both phases can coexist.Comment: Author Information under http://www.theo-phys.uni-essen.de/tp/ags/pelster_dir/. International Journal of Bifurcation and Chaos (in press

Thermodynamics of the superfluid dilute Bose gas with disorder

We generalize the Beliaev-Popov diagrammatic technique for the problem of interacting dilute Bose gas with weak disorder. Averaging over disorder is implemented by the replica method. Low energy asymptotic form of the Green function confirms that the low energy excitations of the superfluid dirty Boson system are sound waves with velocity renormalized by the disorder and additional dissipation due to the impurity scattering. We find the thermodynamic potential and the superfluid density at any temperature below the superfluid transition temperature and derive the phase diagram in temperature vs. disorder plane.Comment: 4 page

Заместительная терапия препаратами антитромбина в комплексном лечении сепсиса

Purpose — to assess the efficacy of supplementation therapy for antithrombin deficiency in the combined treatment of sepsis.Materials and methods. A prospective-retrospective study of the efficacy of supplementation therapy for antithrombin deficiency during sepsis was carried out; 90 patients were examined. The patients were split into two groups whether antithrombin deficiency correction was or was not undertaken. The composite outcome — the incidence of cardiovascular complications as of day 28 from the therapy commencement — was chosen as the primary endpoint of the study. The secondary endpoints of the study were prevalence of adverse events as of day 28 from the therapy commencement and 180-day mortality.Results. There was no difference between the groups either in respect of 28-day mortality or composite outcome. Analysis of secondary endpoints revealed that in the group of patients who received antithrombin supplementation therapy, the risk of development of an acute renal injury was significantly lower on day 28 and 180 from therapy commencement: OR 3.5 [95% CI 1.05–11.66] at P=0.04 and OR 2.92 [95% CI 1.02–8.31] at P=0.045, respectively.Conclusion. Correction of antithrombin level to activity level ‘over 61%’ is associated with decreased incidence degree III acute kidney failure (KDIGO).Цель работы — оценить эффективность применения заместительной терапии недостаточности антитромбина при комплексном лечении сепсиса.Материал и методы. Провели проспективно — ретроспективное исследования эффективности заместительной терапии недостаточности антитромбина при сепсисе; обследованы 90 пациентов. В зависимости от того, проводили ли коррекцию недостаточности антитромбина, пациентов разделили на две группы. Первичной точкой исследования выбрали композитный исход — частоту развития осложнений со стороны сердечно-сосудистой системы через 28 дней после начала лечения. Вторичные точки исследования — частота развития неблагоприятных событий на 28 день от начала лечения и 180 дневная летальность.Результаты. Группы не различались между собой ни по 28-дневной летальности, ни по композитному исходу. При анализе вторичных точек выявили, что в группе пациентов получавших заместительную терапию антитромбином, риск развития острого почечного повреждения был существенно ниже на 28 и 180 сутки от начала лечения: OR 3,5 [95% CI 1,05–11,66] при р=0,04 и OR 2,92 [95% CI 1,02–8,31] при р=0,045, соответственно.Заключение. Коррекция уровня антитромбина до уровня активности «более 61%» ассоциирована со снижением частоты развития острой почечной недостаточности III cт. (KDIGO)