Results 251 to 260 of about 8,071 (302)
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Scour and Erosion, 2010
Rock scour by wall jets downstream of dams can compromise dam safety. The potential for such scour and its extent can be quantified by making use of the Erodibility Index Method (Annandale 1995; 2006). This method is based on a relationship between the stream power of flowing water and a geo-mechanical index representing the erosion resistance of the ...
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Rock scour by wall jets downstream of dams can compromise dam safety. The potential for such scour and its extent can be quantified by making use of the Erodibility Index Method (Annandale 1995; 2006). This method is based on a relationship between the stream power of flowing water and a geo-mechanical index representing the erosion resistance of the ...
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Evaporation Rates on Rock Canyon Walls
Botanical Gazette, 19231. This study is of the evaporation rates at four different heights, representing increasing degrees of exposure, on the walls of a precipitous canyon in the Starved Rock, Illinois, region. 2. Observations covering a period between July 1 and September 20 showed a similar seasonal march in evaporation rates for all four stations, with the high point in
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On the Rocking Behavior of CLT Wall Assemblies
2018In the design of buildings in earthquake-prone areas, it is crucial to identify the dissipative regions, namely areas where energy will be dissipated to ensure the structural integrity during a seismic event. It is important to evaluate the number of dissipative elements, their location within the structure and, wherever possible, to assess their ...
Tamagnone, G., Fragiacomo, M.
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Did rock smash the wall? The role of rock in political transition
Popular Music, 1994A conviction that rock is the central manifestation of the post-War mass culture and the most common form of mass cultural activity, seems undoubted for rock analysts. The question as to whether rock music is able to play any significant role in a process of political change evokes, however, scepticism rather than endorsement (Rosselson 1979; Hibbard ...
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Out‐of‐plane seismic behaviour of rocking masonry walls
Earthquake Engineering & Structural Dynamics, 2011SUMMARYThe evaluation of the out‐of‐plane behaviour of unreinforced walls is one of the most debated topics in the seismic assessment of existing masonry buildings. The discontinuous nature of masonry and its interaction with the remainder of the building make the dynamic modelling of out‐of‐plane response troublesome.
AL SHAWA, OMAR +3 more
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Wall-rock metasomatism of carbonaceous terrigenous rocks in the Lena gold district
Geology of Ore Deposits, 2008The Lena gold district is situated in the fold-and-shear belt of the southern framework of the Siberian Platform. The gold deposits are hosted in the Riphean-Vendian Khomolkho and Aunakit formations, revealing the strict control of ore mineralization by folding and shearing.
V. L. Rusinov +5 more
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Photographing rock‐walls and casings of boreholes
Eos, Transactions American Geophysical Union, 1939Whether or not a camera should be classed as a geophysical instrument may be open to question. When it is adapted to making stratigraphic studies, however, there is some reason for including it at least as an adjunct to geophysical techniques, such as electrical logging, designed for investigating deep‐lying strata.
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Radiowave propagation in a coal seam with inhomogeneous rock walls
IEEE Transactions on Geoscience and Remote Sensing, 1991An idealized slab model of a horizontal coal seam is adopted. The structure is laterally uniform, but the media within and outside the slab are allowed to be inhomogeneous in the vertical direction. A general mode equation is obtained, and simplifications are made to facilitate computation of the propagation constant of the dominant mode.
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Hydrothermal Processes and Wall Rock Alteration
2009In this chapter, I discuss the effects that hydrothermal fluids derived from internal processes have on the ambient lithologies. I begin by describing the main components of a hydrothermal system and models of magmatic-related hydrothermal processes. Circulation of these hydrothermal solutions or fluids, produces physico-chemical changes in the rocks ...
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