Comment on ‘migration of historical earthquakes in California’ by C.-Y. King and Z. Ma     

P. A. Rydelek  L. Knopoff  C. -Y. King 《Pure and Applied Geophysics》1990,133(3):547-551

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Variations of electric resistance and H2 and Rn emissions of concrete blocks under increasing uniaxial compression     

Chi-Yu King  Guangwei Luo 《Pure and Applied Geophysics》1990,134(1):45-56

Electric resistance and emissions of hydrogen and radon isotopes of concrete (which is somewhat similar to fault-zone materials) under increasing uniaxial compression were continuously monitored to check whether they show any pre- and post-failure changes that may correspond to similar changes reported for earthquakes. The results show that all these parameters generally begin to increase when the applied stresses reach 20% to 90% of the corresponding failure stresses, probably due to the occurrence and growth of dilatant microcracks in the specimens. The prefailure changes have different patterns for different specimens, probably because of differences in spatial and temporal distributions of the microcracks. The resistance shows large co-failure increases, and the gas emissions show large post-failure increases. The post-failure increase of radon persists longer and stays at a higher level than that of hydrogen, suggesting a difference in the emission mechanisms for these two kinds of gases. The H₂ increase may be mainly due to chemical reaction at the crack surfaces while they are fresh, whereas the Rn increases may be mainly the result of the increased emanation area of such surfaces. The results suggest that monitoring of resistivity and gas emissions may be useful for predicting earthquakes and failures of concrete structures.  相似文献   

Investigation of the atmospheric mechanisms related to the autumn sea ice and winter circulation link in the Northern Hemisphere   总被引：1，自引：0，他引：1  

Martin P. King  Momme Hell  Noel Keenlyside 《Climate Dynamics》2016,46(3-4):1185-1195

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Extraordinary heat during the 1930s US Dust Bowl and associated large-scale conditions     

Markus G. Donat  Andrew D. King  Jonathan T. Overpeck  Lisa V. Alexander  Imke Durre  David J. Karoly 《Climate Dynamics》2016,46(1-2):413-426

Unusually hot summer conditions occurred during the 1930s over the central United States and undoubtedly contributed to the severity of the Dust Bowl drought. We investigate local and large-scale conditions in association with the extraordinary heat and drought events, making use of novel datasets of observed climate extremes and climate reanalysis covering the past century. We show that the unprecedented summer heat during the Dust Bowl years was likely exacerbated by land-surface feedbacks associated with springtime precipitation deficits. The reanalysis results indicate that these deficits were associated with the coincidence of anomalously warm North Atlantic and Northeast Pacific surface waters and a shift in atmospheric pressure patterns leading to reduced flow of moist air into the central US. Thus, the combination of springtime ocean temperatures and atmospheric flow anomalies, leading to reduced precipitation, also holds potential for enhanced predictability of summer heat events. The results suggest that hot drought, more severe than experienced during the most recent 2011 and 2012 heat waves, is to be expected when ocean temperature anomalies like those observed in the 1930s occur in a world that has seen significant mean warming.  相似文献   

The broken hill ore deposit: An early note on its genesis     

Haddon F. King 《Mineralium Deposita》1970,5(2):191-191

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Mobility Of Manufacturing And The Intrastate Redistribution Of Employment     

Paul E. King 《The Professional geographer》1975,27(4):441-448

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THE HUMAN FACTOR IN AGRICULTURAL DEVELOPMENT: A CASE-STUDY FROM SARDINIA*     

Russell King 《The Professional geographer》1971,23(3):204-207

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Numerical model of the Moon's rotation     

R. J. Cappallo  R. W. King  C. C. Counselman III  I. I. Shapiro 《Earth, Moon, and Planets》1981,24(3):281-289

We have integrated numercially the differential equtions for the Moon's rotation with respect to an inertial coordinate system, and the variational equations for (i) the six initial conditions of the rotation; (ii) the moment-of-inertia ratios and ; and (iii) the coefficients of the third-degree gravitational harmonics. When these integrations are used in conjunction with our current lunar-orbit and Earth-rotation models, and all of the relevant initial conditions and parameters are adjusted to fit five years of McDonald Observatory lunar laser ranging observations, the root-mean-square (rms) of the postfit range residuals is 28 cm. When we adjust the lunar-rotation initial conditions separately to fit the physical libration angles given by the numerical model of Williams (1975), we find an rms orientation difference over a six-year interval of 0.03 arcsecond, after removal of a constant bias. A similar comparison of our model with the semi-analytical model of Eckhardt (1981) yields an rms orientation difference of 0.2 arcsecond.  相似文献   

Lateral forces on ships in steady motion parallel to banks or beaches     

G.W. King  E.O. Tuck 《Applied Ocean Research》1979,1(2):89-98

A mathematical formulation for the motion of a slender ship in shallow water parallel to straight bottom contours is described. From this, a singular integral equation which determines the vorticity on the ship is derived, together with a numerical procedure for solving this integral equation. Particular attention is paid to the trailing edge of the ship, so that the correct solution of the integral equation is found. Numerical results for the cases of a bank or a uniformly sloping beach are provided. The effect of changing the water plane shape of ships is investigated, as well as the effects of changing the local water depth, distance to beach or bank, beach angle and yaw. General conclusions are drawn where possible and illustrate the properties of the bottom geometry.  相似文献   

A review of vortex shedding research and its application   总被引：1，自引：0，他引：1  

Roger King 《Ocean Engineering》1977,4(3):141-171

This paper is a review of research work with cylinders in steady currents. The emphasis is mainly on cylinders in water, particularly the research undertaken at BHRA and its general application. Comparisons are made with the work of other authors for both water and air flow and over 60 references are reviewed. The mechanisms of flow-excited oscillations are discussed for isolated vertical and inclined cylinders. The effects of length/diameter ratio, cylinder surface roughness and channel blockage are presented. Wake interactions caused by cylinder-cylinder and cylinder-splitter arrangements are detailed. The results of tests with pane and three-dimensional frames are described and quantified in terms of isolated cylinder data.The paper closes with a section describing methods of avoiding oscillations by calculation at the design stage or by the use of clamp-on devices for completed structures in water flow.  相似文献