The evolution of the structure of galaxies as a function of redshift is investigated using two parameters : the metric radius of the galaxy and the power at high spatial frequencies in the disk of the (Rg) galaxy (s). A direct comparison is made between nearby (zD 0) and distant galaxies by (0.2[ z[ 1) following a Ðxed range in rest frame wavelengths. The data of the nearby galaxies comprise 13...

This paper deals with the leader-follower formation control problem while communication constraint in data transmitting is considered. From a practical point of view, we study the case in which unmanned vehicles are subject to the limited sensing, and communication is of a particular interest. A three-dimensional formation flight of multi-unmanned aerial vehicles with leader-follower configurat...

the molybdenum dicilicide is an intermetallic compound with two allotropies tetragonal ?-mosi2 and hexagonal ?-mosi2.the ?-mosi2 phase is established to 1900 ?c and ?-mosi2 phase from 1900 to 2050 ?c. this material has considerable properties that provide different applications in different industries such as air-space industry and gas turbines. the molybdenum synthesis can be down in various w...

We study the patterns generated in finite-time sweeps across symmetry-breaking bifurcations in individual-based models. Similar to the well-known Kibble-Zurek scenario of defect formation, large-scale patterns are generated when model parameters are varied slowly, whereas fast sweeps produce a large number of small domains. The symmetry breaking is triggered by intrinsic noise, originating from...

In the present work a detailed numerical study of parameters influencing droplet formation in flow-focusing microfluidic device are made. First, an extensive verification simulations with data from literature is carried out. Influence like viscosity and inflow velocity compared results showing good agreement. Some differences attributed to different techniques used: pure volume-of-fluid method ...