Aleksander G. Chefranov

The paper describes some concepts on processes occurring in the neuroendocrine and immune systems during development of general unspecific adaptational…

A shortcoming common to all existing designs of mechanical cardiac valve prostheses is an increased trombogenicity caused, among other factors,…

Research methodology and methods used in experiment Mars-500 held at the Institute of Biomedical Problems of the Russian Academy of…

It is shown that initiated by action of molecular viscosity impulse flow, directed usually from the moving fluid to limiting…

Aleksander G. Chefranov

This paper deals with solving of a century-old paradox of linear stability for the Hagen-Poiseuille flow. A new mechanism of dissipative hydrodynamic instability has been established herein, and a basis for the forming of helical structural organization of bloodstream and respective energy effectiveness of the cardiovascular system functioning has been defined by the authors.

Leonardo da Vinci perhaps was the first who paid attention to the energetic efficiency of existence of vortices emerging near sines of Valsalva and defining normal functioning (opening) of aortal valve. However up to now a fundamental problem of defining of mechanisms of mysterious energetic efficiency of functioning of cardio-vascular system (CVS) of blood feeding of the organism is still remaining significantly not solved and this is, for example, one of the main restriction for the creation of artificial heart and corresponding valve systems.

In the suggested here linear theory of hydrodynamic instability of the Hagen - Poiseuille flow it is counted the possibility of quasi periodic longitudinal variations, when there is no separation of the longitudinal and radial variables in the description of the disturbances field.

The limitations of capabilities of the existing mathematical weather prediction (including forecasting for weather-sensitive individuals) cannot be duly realized nowadays due to the fact that till now there is no proof of the existence and uniqueness of smooth solutions of the three-dimensional (3D) Navier-Stokes equation (in any finite period of time).

Our book in WoS™ Core Collection

We are glad to inform you that the book "Theoretical principles of heart cycle phase analysis" written by researchers from Russian New University has been accepted and indexed in The Book Citation Index in Web of Science™ Core Collection

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