Hydrogen permeability of the Pd–Pb system foil of various composition

The purpose of the study was identification of the role of the chemical composition of Pd, Pb-alloys based of palladium in the processes of injection and extraction of atomic hydrogen. The objects of study were Pd-Pb alloy foils with a lead content of 3, 5, 7, 9, and 11 at. %, representing the b-phase of the solid solution. Samples with a thickness of 40 to 62 µm were obtained by cold rolling. Hydrogen permeability was studied by cyclic voltammetry and two-stage cathode-anode chronoamperometry in deaerated solutions of 0.1 M H2SO4. The obtained results were processed according to a mathematical model developed for electrodes of semi-infinite thickness. The dependence of the hydrogen permeability coefficient, as well as the rate constants of the processes of injection and extraction of atomic hydrogen, on the chemical composition of the alloy has been revealed. It was found that the Pd–Pb alloy with a lead content of 5 at.% demonstrates the highest values of hydrogen permeability compared with samples of the same crystal structure, since the rate constant of atomic hydrogen injection is very sensitive to the alloy structure. The latter confirms that the phase-limiting transition of atomic hydrogen into the alloy is the rate-determining stage, at least in the initial period of time

Diagnosing Aging: I. Problem of Reliability of Linear Regression Models of Biological Age

Abstract-The problem of the reliability of linear regression models of biological age assessment was studied using an experimental population of patients of a geroprophylactic center. The main factors of the model quality (interpopulation difference, method of approximation of biological age, and methods of approximation of statistical significance of parameters of biological age models) were tested. New equations were derived for calculating biological age. All parameters of these equations meet the requirements of significance. It was shown that if the nonlinear character of age dynamics of biological markers of aging and the statistical significance of model parameter estimates are taken into account, the model of biological age is substantially simplified and its reliability increases

A NEW METHOD FOR PREDICTING BACTERIAL PNEUMONIA IN PATIENTS WITH INFLUENZA AND OTHER ACUTE RESPIRATORY VIRAL INFECTIONS

Purpose: to develop an effective and affordable method for a practical doctor to predict the development of bacterial pneumonia in patients with influenza and other acute respiratory viral infections. Materials and methods: to develop a method for predicting bacterial pneumonia in patients with influenza and other acute respiratory viral infections, a continuous group of 247 patients was formed: 63 of them were diagnosed with bacterial pneumonia for 5-7 days of illness, and the remaining 184 had verified infectious diseases in uncomplicated form. Evaluation of the effectiveness of the proposed forecast method was performed on 150 patients with influenza and other acute respiratory viral infections. The technical basis of this study was the Extech 110 pH meter, with which the observed acidity of the skin of the lower third of the palmar surface of the forearm was studied on the 1-2, 3-4, 7-10 days of the disease. Results: the developed method for predicting bacterial pneumonia in patients with influenza and other acute respiratory viral infections is characterized by prostate use, as well as high rates of sensitivity, specificity and accuracy.Conclusions: the pH level of the skin of the palmar surface of the lower third of the forearm in patients with influenza and other acute respiratory viral infections of less than 4.80 is a statistically significant prognostic criterion for the development of this category of patients in the next 2-3 days of bacterial pneumonia

Application of Artificial Intelligence in Cardiology : A Bibliometric Analysis

Peer reviewe

A new method of etiopathogenetic treatment of patients with influenza

Purpose: to develop an effective and safe method for the etiopathogenetic treatment of influenza patients, aimed at increasing the effectiveness of the existing standard treatment using the antiviral drug oseltamivir.Materials and methods: 150 patients with a verified diagnosis of influenza were taken under observation. All of the participants were divided by randomization into two groups (n1 = 77, n2 = 73) which had the same initial clinical and laboratory characteristics. I group’s patients received standard antiviral therapy using oseltamivir. Patients of the II group at the same time as oseltamivir additionally received an aqueous solution of rehydron for 5 days. All patients underwent determination of the acidity of the mucous membrane of the oropharynx immediately before the start of antiviral therapy and immediately after its completion.Results: patients additionally receiving rehydron had a more rapid leveling of the main symptoms of influenza and a decrease in the frequency of its complications compared with people who received only standard treatment.Conclusions: the developed method of etiopathogenetic treatment of patients with influenza is characterized by a proven level of effectiveness, which is associated with the corrective effect of rehydron on the acid-base balance of the mucous membranes of the respiratory tract. The data obtained in the course of the study indicate not only the absolute scientific novelty of the developed method, but also its applied significance for practical public health

A Fuzzy Logic Solar Controller with Maximum Power Point Tracking

В статье рассматриваются два алгоритма функционирования контроллера солнечной батареи автономной системы электропитания и проводится их сравнительная оценка. В соответствии с алгоритмами контроллер солнечной батареи может работать как в режиме поиска экстремальной мощности солнечной батареи, так и в режиме заряда аккумуляторной батареи заданным током при ограничении зарядного напряжения. Приведены блок-схемы разработанных алгоритмов заряда аккумуляторной батареи и поиска экстремальной мощности солнечной батареи. Проведено исследование процессов в автономной системе электропитания с использованием физического макета и имитационной модели, показавшее правильность предложенных алгоритмов. Выполнено количественное сравнение эффективности работы системы электропитания при использовании алгоритмов поиска экстремальной мощности с постоянным и переменным шагомThis article presents the discussion and comparison of two solar controller operation algorithms. According to these algorithms, the solar controller can operate in maximum power point tracking mode and battery charging mode, which is characterized by the maintaining an optimal charging current with the limiting of battery voltage. The paper presents the block diagrams of the maximum power point tracking mode algorithm and battery charging algorithm. The study of processes in an autonomous power supply system using the physical layout and simulation model, showed the correctness of the proposed algorithms. A quantitative comparison of the efficiency of the power supply system was made using the constant and variable step maximum power point tracking algorithm