Changes of gas metabolism, gas homeostasis and tissue respiration in rats during prolonged hypokinesia

The oxygen uptake and tissue gas homeostasis of restrained albinic rats remained relatively constant during a 60 day experiment. The gas metabolism in some tissues changed, and O2 consumption increased in the liver and decreased in the myocardium. Capacity for physical work was reduced by five times. Hypokinesia for 60 days resulted in a delay in the animals growth

Прогнозирование тяжести геморрагической лихорадки с почечным синдромом

The aim is to develop a method of early prediction of the severity of hemorrhagic fever with renal syndrome on the basis of clinical and laboratory data.A comprehensive clinical and laboratory examination of 144 patients with hemorrhagic fever with renal syndrome was carried out in the period of 2–5 days from the onset of the disease. Based on the discriminant analysis of the data obtained, a discriminant model for predicting the severity of hemorrhagic fever with renal syndrome was developed. The index of accuracy of prognosis of clinical forms of the disease on the basis of the developed discriminant model is 97.4%.Цель – разработать на основе клинико-лабораторных данных метод раннего прогнозирования тяжести геморрагической лихорадки с почечным синдромом.Осуществлено комплексное клинико-лабораторное обследование 144 пациентов с геморрагической лихорадкой с почечным синдромом в период 2–5 суток от начала заболевания. На основе дискриминантного анализа полученных данных разработана дискриминантная модель прогнозирования тяжести геморрагической лихорадки с почечным синдромом. Индекс точности прогнозирования клинических форм заболевания на основе разработанной дискриминантной модели составляет 97,4%

AN INTERNAL NONLINEAR RESONANCE IN AN OSCILLATION SYSTEM WITH TWO DEGREES OF FREEDOM

Subject and Purpose. The paper is concerned with the behavior of a nonlinear dynamic system that has two degrees of freedom and whose joint nonlinearity is established by all the nonlinear coupling between the degrees of freedom. The purpose is to find out if the Krylov—Bogolyubov—Mitropolsky (KBM) method is applicable to a system of partial differential equations. Methods and Methodology. The consideration of the problem is by the Krylov—Bogolyubov—Mitropolsky method in the first approximation. Then the results are treated using numerical methods. Results. An electromechanical system with two degrees of freedom and a known parametric resonance has been studied using the Krylov—Bogolyubov—Mitropolsky method in the first approximation. The phase space of the system has been described. It has been shown that the obtained solution covers an energy periodic transfer between the two degrees of freedom. The difference between the considered oscillation system and its analogs discussed in the literature lies in that the considered circuit is parametrically excited by an internal force rather than external one. In a similar system of two circuits connected through a diode, the coupling includes a linear component. In the system of present concern, the coupling is all-nonlinear. Conclusion. The obtained results are of interest for the research into internal nonlinear resonances between degrees of freedom in an oscillation system that has two degrees of freedom and whose joint nonlinearity is due to all the nonlinear coupling between the degrees of freedom. The considered system can serve a test example in the development of programs implementing the Krylov—Bo- golyubov—Mitropolsky method as applied to an oscillation system with numerous degrees of freedom and a small nonlinearity

Prediction of severity of hemorrhagic fever with renal syndrome

The aim is to develop a method of early prediction of the severity of hemorrhagic fever with renal syndrome on the basis of clinical and laboratory data.A comprehensive clinical and laboratory examination of 144 patients with hemorrhagic fever with renal syndrome was carried out in the period of 2–5 days from the onset of the disease. Based on the discriminant analysis of the data obtained, a discriminant model for predicting the severity of hemorrhagic fever with renal syndrome was developed. The index of accuracy of prognosis of clinical forms of the disease on the basis of the developed discriminant model is 97.4%