the water hammer phenomenon in hydroelectric power plant’s penstock is one of the famous troubles which have been an interest for researchers. hence this phenomenon can cause many harmful effects on pipe lines and turbine, it is essential that effects of these surges along with line and turbine have been studied and suitable methods for controlling presented. in this way one of the most effecti...

The article presents the ability of technical condition buildings and structures energy facilities in areas with unstable soil a high level groundwater. A method for determining falling hammer when pile is immersed ground, height speed fall impact part hammer, as well constant (J/kg) α (J/s), on which all calculations are based, considered. Calculations testing driven piles given. static load. ...

C hange control. For me, this vital issue in software project management immediately conjures the image of the famous 1984 Macintosh commercial. Remember that one? Gray drudges standing row upon row, staring with numb compliance at a lecturing bureaucrat , set free by a hero who bursts in and hurls a hammer that breaks the spell of Big Bad Brother. This image depicts my personal struggle with t...