1,387 research outputs found
Gammon Quartet, 1912
No full textThe Gammon Quartette in 1912.Written on recto: P.R. Vauls, J. D. Rice, R. N. Brooks, I.C. Snowden. Text from slide presentation: Cultural events at the college provided entertainment for the community and the park-like campus provided a place to stroll and picnic
Gammon Quartet, 1912
No full textThe Gammon Quartette in 1912.Written on recto: P.R. Vauls, J. D. Rice, R. N. Brooks, I.C. Snowden. Text from slide presentation: Cultural events at the college provided entertainment for the community and the park-like campus provided a place to stroll and picnic
Direct numerical simulation of turbulent Couette-Poiseuille flow with zero skin friction
No full textThe near-wall scaling of mean velocity U(y) is addressed for the case of zero skin friction on one wall of a fully turbulent channel flow. The present DNS results can be added to the evidence in support of the conjecture that U is proportional to √yw in the region just above the wall at which the mean shear dU/dy = 0
Scaling and intermittency in ocean turbulence: analysis of coastal water optical properties and sea surface temperature (SST)
No full textWe consider here some scaling and intermittency properties of oceanic turbulence, with a general aim of considering the impact of turbulence on the bio-optical dynamics. For that purpose, we tried two different approaches, using in situ and satellite data. For the in situ study we adopted one dimensional and for the satellite two dimensional approaches. Different techniques such as Fourier power spectrum, Empirical mode of decomposition (EMD), Hilbert spectral analysis (HSA) have been used for analyzing the intermittency characteristics of the in situ data. For analyzing the multi-scale properties of the satellite images, we have considered Structure functions (SF) and Fourier power spectrum (1D and 2D). The general objective is to understand the multi-scale oceanic variability using scaling tools developed in the field of intermittent turbulence studies
The middle Pleistocene Merced-2 and -3 sequences from Ocean Beach, San Francisco
No full textR.M Carter, S.T Abbott, I.J Graham, T.R Naish, P.R Gammo
The organization of industry in the P.R. China: A new start or resort to old concepts?
No full textThe Chinese have let it be known since the death of Mao Zedong and the purge of the “Gang of Four” that they would in future draw on credits from foreign governments as well as other sources to finance imports of technology. According to western conjectures China’s capital requirements may be between US $ 25 and 50 bn or even a good deal higher. Many observers have taken the view that the Chinese have thereby put all their former development principles behind them. The author of the following article was in the P.R. China about the middle of this year at the invitation of the National Planning Commission. His assessment is that the P.R. China is far from embarking on an entirely new course in its development policy
Facies and sequence stratigraphy of eocene palaeovalley fills in the eastern Eucla Basin, South Australia
No full textCopyright © 2003 Elsevier B.V. All rights reserved.The Eocene succession filling palaeovalleys in the northeastern Eucla Basin, South Australia, is interpreted using facies and sequence-stratigraphic models based on relative sea-level changes. The dominantly fluvial sediments were deposited in incised valleys which graded basinwards to an estuarine coastal plain under warm and humid palaeoclimatic conditions. Sedimentological examination suggests a tidal influence in this fluvial succession. Fluvial-estuarine-shoreline facies associations can be recognised in these (Eocene) sequences, each of which comprises a diverse assemblage of lithofacies that can be grouped into lowstand and/or transgressive and highstand system tracts. Since the palaeorivers had hydrological connection with the sea, deposition was dominantly controlled by sea-level changes. Results of the study indicate that two third-order Eocene eustatic cycles have largely controlled sedimentation. The resulting key surfaces (unconformity, and transgressive, tidal/wave ravinement, and maximum flooding surfaces) bound depositional sequences which extend over significant areas and may be used in basin-wide correlations of stratal packages. © 2003 Elsevier B.V. All rights reserved.B Hou, N.F Alley, L.A Frakes, P.R Gammon and J.D.A Clarkehttp://www.elsevier.com/wps/find/journaldescription.cws_home/503361/description#descriptio
Constant approximation for virtual backbone construction with guaranteed routing cost in wireless sensor networks
No full textThe paragenetic history of a Marinoan cap carbonate
No full textCarbonates that cap late Neoproterozoic glacial diamictites contain large, atypical tepee-like structures that have been interpreted as evidence for seafloor dolomite cementation. The Nuccaleena Formation in the Adelaide Fold-Thrust Belt is the stratotype Marinoan-age cap dolostone. At Parachilna Gorge the Nuccaleena Formation contains paired cogenetic tepees and growth faults that demonstrate these structures grew well below the sediment-water interface. These tepees, and their associated sheet veins, were the result of pore fluid overpressure driven by expansive, early diagenetic dolomite cementation. Fluid overpressure resulted in two forces: 1) macroscale lateral compression that overcame the lithostatic weight to buckle sediments upward, forming the tepee structure, and 2) macro- to microscale extension that overcame the lithologic tensile strength to form sheet veins. The physical processes of fluid overpressure within the Parachilna Gorge cap carbonate are in many ways analogous to the fluid overpressure dynamics in mud volcanoes, and were sufficiently high to generate veins extending 17. m below the cap carbonate. Overpressure-driven dewatering removed pore fluid, clay and organic matter from the dolomicrospar matrix into dewatering structures and fabrics. The latter are hierarchically arranged from small linear clay fabrics to clay-lined dendritic arrays to clay-choked curvilinear veins to large sheet veins. Packets of red clay laminae were deposited when pore fluids vented to the sea floor. The early diagenetic chemical evolution of the Parachilna Gorge cap carbonate was equally dynamic, in which an initial reducing trend was supplanted by an oxidation trend brought about by tepee-sheet vein deformation. Once established the sheet vein network also reinvigorated diffusional processes that likely enhanced early diagenetic cementation of the cap dolostone. The detailed paragenetic history also suggests that calcite not dolomite was the initial carbonate precipitated from the post-glacial Adelaidean sea. The Nuccaleena Formation exhibits the dolomicrospar, isotopic signatures and tepee-like structures that distinguish Marinoan-age cap carbonates. At Parachilna Gorge these typical features are a product of early diagenesis, suggesting that other Marinoan-age cap carbonates may also be early diagenetic in origin. © 2011 Elsevier B.V.P.R. Gammon, D.M. McKirdy, H.D. Smit
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