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Full-Text Articles in Medicine and Health Sciences
Comparative Records Of Occupation In The Keep River Region Of The Eastern Kimberley, Northwestern Australia, Ingrid Ward
Comparative Records Of Occupation In The Keep River Region Of The Eastern Kimberley, Northwestern Australia, Ingrid Ward
Faculty of Science, Medicine and Health - Papers: part A
This paper considers the record of occupation in the Keep River region of the eastern Kimberley, and whether archaeological records are equally preserved within as well as between regions. Luminescence dating, radiocarbon dating and archaeological evidence from eight rock shelter sequences provide only late Holocene (5 - 0 ky BP) occupation sequences, whereas luminescence dating and archaeological evidence for three sand-sheet sequences indicate occupation dating to 18 ky BP. Given that rock shelters and sand sheet excavations can produce such different chronologies, it is questioned to what extent the representative records for the eastern Kimberley, and the adjacent western Kimberley, …
Minimum Energy As The General Form Of Critical Flow And Maximum Flow Efficiency And For Explaining Variations In River Channel Pattern, He Qing Huang, Howard H. Chang, Gerald Nanson
Minimum Energy As The General Form Of Critical Flow And Maximum Flow Efficiency And For Explaining Variations In River Channel Pattern, He Qing Huang, Howard H. Chang, Gerald Nanson
Faculty of Science, Medicine and Health - Papers: part A
Although the Bélanger-Böss theorem of critical flow has been widely applied in open channel hydraulics, it was derived from the laws governing ideal frictionless flow. This study explores a more general expression of this theorem and examines its applicability to flow with friction and sediment transport. It demonstrates that the theorem can be more generally presented as the principle of minimum energy (PME), with maximum efficiency of energy use and minimum friction or minimum energy dissipation as its equivalents. Critical flow depth under frictionless conditions, the best hydraulic section where friction is introduced, and the most efficient alluvial channel geometry …