15 research outputs found
Population dynamics in compressible flows
Organisms often grow, migrate and compete in liquid environments, as well as
on solid surfaces. However, relatively little is known about what happens when
competing species are mixed and compressed by fluid turbulence. In these
lectures we review our recent work on population dynamics and population
genetics in compressible velocity fields of one and two dimensions. We discuss
why compressible turbulence is relevant for population dynamics in the ocean
and we consider cases both where the velocity field is turbulent and when it is
static. Furthermore, we investigate populations in terms of a continuos density
field and when the populations are treated via discrete particles. In the last
case we focus on the competition and fixation of one species compared to
anotherComment: 16 pages, talk delivered at the Geilo Winter School 201
Study of the fractional composition of electroerosive powder materials of the tungsten nickel iron alloy obtained in lighting kerosene
The article presents the results of experimental research aimed at studying the fractional composition of electroerosive powder materials of the tungsten nickel iron alloy obtained in lighting kerosene. It has been found that more than half of the total number of particles is particles with a size of less than 47.7 microns. It was also noted that particles with a size less than or equal to 29.37 microns in the powder include 20.0% of the total volume. The conducted research makes it possible to determine the most relevant field of application of the obtained powder materials and will improve the quality of scientific and technical developments in the field of application of electroerosive powder materials
Study of the fractional composition of electroerosive powder materials of the tungsten nickel iron alloy obtained in lighting kerosene
The article presents the results of experimental research aimed at studying the fractional composition of electroerosive powder materials of the tungsten nickel iron alloy obtained in lighting kerosene. It has been found that more than half of the total number of particles is particles with a size of less than 47.7 microns. It was also noted that particles with a size less than or equal to 29.37 microns in the powder include 20.0% of the total volume. The conducted research makes it possible to determine the most relevant field of application of the obtained powder materials and will improve the quality of scientific and technical developments in the field of application of electroerosive powder materials