Hans-Åke Nordström Hans-Åke Nordström Hans-Åke Nordström (born c. 1934) is a Swedish archaeologist and professor at Uppsala University. His work has included excavations in parts of Nubia, submerged since the construction of the Aswan Dam, and the development of the Vienna System for classifying Egyptian pottery. Hans-Åke Nordström was born around 1934. During the 1960s he excavated parts of Nubia, an area between Aswan in Egypt and Khartoum in Sudan, which were submerged following the construction of the Aswan Dam. In 1972 he received his Ph.D., on the basis of his thesis "Ceramic Ecology and Ceramic Technology. Early Nubian Cultures from the
Hydropower policy in the United States of 90% efficiency. More importantly, Francis's mathematical and graphical calculation methods advanced turbine design and engineering and allowed confident design of high efficiency turbines to exactly match a site's flow conditions. In the 1870s and deriving from uses in the mining industry, the high efficiency Pelton wheel impulse turbine was developed to use hydropower under very different flow and pressure conditions. Advances in dam design also progressed, with the completion of Old Aswan Dam being considered a milestone of engineering over nature. At the time of its construction, nothing of such scale had ever been attempted: it also became one