in the first part of this thesis we explored wetting and its dynamics for small droplets. first, we showed how a simple feature of water droplets on a surface, i.e. laplace pressure, can be exploited to build a micropump. we investigated capillary pumping in microchannels both experimentally and numerically. putting two droplets of different sizes at the in/outlet of a microchannel, will ge...

today the image of a permanent skeletal space of cities affected by some forces or mechanisms is put in time with social-economic development and while imposes a new face and perspective to physical anatomy of cities, and prepares field to changes in content and social- economic structures of cities too. simultaneously with quitting villages in order to settle in cities by villagers, the phen...

The Egypt army as a powerful institution has always played an important role in the political scene in Egypt and is now at the helm in the government is facing with important challenges. From one side, Egypt›s military rule has the main responsibility of maintaining the security and on the other hand, it is faced with internal pressures in its attempt to make the necessary changes and refining ...