This paper presents a classification of cavitation damage levels on spillway surface. Two important factors influencing cavitation damage have been considered in this study, flow velocity and cavitation index. Based on these factors, five different damage levels from no cavitation damage to major cavitation damage have been determined. The method was applied to data of the Shahid Abbaspour dam ...

Tire de sa these, le livre Pierre Guidi couvre un demi-siecle l’histoire l’Ethiopie, par dela la Revolution 1974, depuis restauration Hayla Sellase, en 1941, jusqu’a chute Mangestu Maryam, 1991. Il demontre combien les politiques d’education decidees a Addis Ababa contribuerent au faconnement d’une « conscience nationale ethiopienne » Walaytta. Ce royaume du sud-ouest conquis Menilek personne 1...

FEED manufacturers are often forced by circumstances to focus on short-term concerns such as: How many tons were produced this week? How many customers do I have, or how much down time did I have this week? While important, short-term problems can cause manufacturers to focus on solving problems rather than pursuing the company’s mission. Manufacturers who regularly examine their company’s miss...

Monitoring and providing warnings for coal mine rockburst disasters is a worldwide problem. Several accidents have occurred in 1301 belt transport chute near 1300 fully mechanized caving face. To address this issue, an empirical study of the occurrence mechanism rockbursts adjacent area top-coal face was carried out. This paper mainly addresses following issues: (1) based on microseismic monito...

With the milk to feed ratio at 2.36 in February, 2008, dairy managers must carefully reviewing feed inputs relative to milk yield. A milk to feed ratio under 3 is a signal to reduce feed inputs. Feed efficiency (also referred to as milk performance efficiency and dairy efficiency) can be defined as pounds of 3.5%FCM (fat corrected milk) produced per pound of dry matter (DM) consumed. Monitoring...