Gedenktage     

J. Joseph 《Ocean Dynamics》1970,23(1):31-31

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Theoretical and experimental dynamic behaviour of a curved model bridge structure     

Kazuhiko Kawashima  Joseph Penzien 《地震工程与结构动力学》1979,7(2):129-145

Correlations between analytical and experimental seismic responses of a curved model bridge structure, which was constructed to have the same features as a typical full-scale high curved highway bridge structure, are presented. Dynamic behaviour and seismic response of the experimental bridge model are examined with particular emphasis on the discontinuous behaviour of expansion joints. Modelling of Coulomb type friction with slippages and impacting at the expansion joints is described. Correlations of displacement response of the bridge model carried out for three seismic excitations are presented. Parameter studies conducted to assist in the interpretation of correlation results are presented and the characteristics of the dynamic behaviour of the bridge model are discussed.  相似文献   

Lime incrustingHapalosiphon intricatus (Cyanophyceae) and phosphate availability in a Florida cave     

Joseph S. Davis  David G. Rands 《Aquatic Sciences - Research Across Boundaries》1982,44(2):289-294

Hapalosiphon intricatus (Cyanophyceae) with lightly calcified sheaths, is the dominant filamentous alga reported from a humid, dimly-lighted limestone cave in northcentral Florida (USA). Within the limestone substrate, hydroxyapatite is the form of the phosphate mineral providing nutrient to the algae. Florida Agricultural Experiment Station Journal series No. 4381.  相似文献   

The Northwest European pollen flora. II. | W. Punt and G.C.S. Clarke (Editors), 1980. Parts 8–20. Elsevier,Amsterdam, 265 pp., U.S. $63.50, Dfl. 130.00     

Joseph Praglowski 《Earth》1981,17(3):308-309

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Geochemistry and origin of the early Precambrian crust of northeastern Minnesota   总被引：2，自引：0，他引：2  

Joseph G Arth  Gilbert N Hanson 《Geochimica et cosmochimica acta》1975,39(3):325-362

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Numerical experiments with alternative boundary layer formulations using bomex data     

Joseph P. pandolfo 《Boundary-Layer Meteorology》1971,1(3):277-289

The basic numerical air-sea boundary-layer model described in Pandolfo (1969a, b) was varied to produce a set of models with differing atmospheric boundary-layer formulas, four of which are discussed here. Model I is the basic model itself, with stability and sea-state dependent eddy viscosity, conductivity and diffusivity which may, in certain ranges ofRi, be unequal. This model is applied on a relatively fine grid. Model II, applied on the same grid, uses formulas which yield equal eddy conductivity, diffusivity, and viscosity. The calculated eddy coefficients depend only on the height and wind shear. Model III uses the same exchange coefficient formulas as Model II. However, the surface-layer eddy flux in Model III is calculated by assuming that logarithmic profiles of the transported variables are present in this layer. Model IV is the same as Model III in these respects, but employs a relatively coarse vertical grid. This model, therefore, includes boundary layer formulas most like those conventionally used in large scale atmospheric models (e.g. Miyakoda, 1969).The four models were integrated numerically with identical inputs of initial, boundary, and auxiliary data prepared from observations made over the eastern half of the BOMEX observational area during June 21–25, 1969.Models I and IV are, in general, in better agreement with each other than either is with Model II. This is true for the model-generated upper and lower boundary fluxes of mean momentum and latent heat; and for the internal boundary layer production of mean kinetic energy by the cross-isobaric flow component. Model I agrees, on balance, about as well with Model IV as does Model III. The solutions for Models I, III, and IV are also, in general, more consistent with observed data, viz. 5-day average temperature profiles in the layer from the surface to 1000 meters, and 5-day averages of sea surface temperature and of surface-layer atmospheric humidity. Solutions for Model I are in better overall agreement with the observed data, and with the average observed surface-layer wind.The results show that, under the limitations implicit in these preliminary experiments, accurate simulations of observed data are possible with boundary-layer formulas of the type used in Model IV, and even more accurate simulation with the modest refinements represented by Model I. Piecemeal imposition of such refinements could, however, lead to models, like Model II, with significantly different energetic properties and less simulative accuracy. Specifically, the results support the speculation (Miyakodaet al., 1969) that the shallowness of the simulated Trades noted in some large-scale models is due to deficiencies in the boundary-layer eddy stress formulations used.  相似文献   

The Tucson meteorite     

Gary T. Miyake  Joseph I. Goldstein 《Geochimica et cosmochimica acta》1974,38(8):1201-1212

Tucson is an unusual iron meteorite which contains highly reduced silicate inclusions and elemental silicon and chromium in solution. The metal matrix of Tucson was found to be chemically uniform, suggesting that homogenization has occurred at elevated temperatures. The microstructure of the metal consists of plessite and thin ribbons of kamacite. Nickel and phosphorus concentrations indicate that kamacite nucleated along prior taenite grain boundaries at ~650°C, and grew upon cooling to 500°C. Kamacite growth calculations show that Tucson cooled at ~1°C/1000 yr, a rate which corresponds to a depth of burial at the center of a 15 km radius parent body or closer to the surface of parent bodies of larger sizes. The shapes of the Tucson irons, and the presence and distribution of silicate inclusions in the Fe-Ni matrix appear to be a result of a solidification process.  相似文献   

Variation of albedo with solar incidence angle on planetary surfaces     

Steven W. Squyres  Joseph Veverka 《Icarus》1982,50(1):115-122

While it has been known for a long time that in general the albedo of a surface depends on incidence angle, this fact is commonly neglected in many calculations of planetary surface temperatures. We show that the effect is especially pronounced for bright surfaces. For objects such as Ganymede and Io, the effect produces substantially cooler temperatures near the poles and terminators that would be calculated under the assumption of a constant albedo—a factor which may be important in determining the stability of frosts on such surfaces.  相似文献   

Letters to the editor: Tuna management — the debate continues     

James Joseph  J.A. Gulland 《Marine Policy》1978,2(3):239-240

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Commission on Geographical Education Newsletter 11, December 1985     

Joseph P. Stoltman 《GeoJournal》1986,12(2):217-219

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