Now showing items 12451-12459 of 12459
Late Cenozoic magnetostratigraphy (11 – 0 Ma) of the Dongshanding and Wangjiashan sections in the Longzhong Basin, western China
(Kluwer Academic Publishers; Springer Science+Business Media, 1997-03)
A paleomagnetic study of the 510-m-thick Wangjiashan section of Late Miocene and Pliocene terrestrial sediments reveals a fairly complete reversal record with ages from 11 to 1.8 Ma. The magnetostratigraphy of the Dongshanding ...
Effects of genotype on the response of Populus tremuloides michx. To ozone and nitrogen deposition
(Kluwer Academic Publishers; Springer Science+Business Media, 1992-04)
Elevated O 3 concentrations and N deposition levels co -occur in much of eastern United States. However, very little is known about their combined effects on tree growth. The effects of three O 3 treatments: charcoal-filtered ...
The spacing of streaks in unsteady turbulent wall‐bounded flow
(The American Institute of Physics, 1994-07)
The spacing of streaks of low‐speed fluid has been studied experimentally in a wall‐bounded turbulent flow in which sinusoidal unsteadiness was superposed on an otherwise steady mainstream over a range of frequencies. The ...
Low‐temperature conductivity of epitaxial ZnSe in the impurity band regime
(The American Institute of Physics, 1994-11-14)
Low‐temperature conductivity of several samples of ZnSe grown by molecular‐beam epitaxy has been measured. The data indicate that for samples with carrier concentration below or near Nc, metal insulator transition, the ...
Dynamic Stability of a Composite Circular Cylindrical Shell Subjected to Combined Axial and Torsional Loading
(Sage Publications, 1993)
The dynamic stability of thin, clamped, composite circular cylindrical shells is studied for combined axial and torsional loading. Each load is taken to be har monically varying; the frequencies of the two loads differ, ...
Dynamic response of a rotating beam subjected to an accelerating distributed surface force
(Elsevier, 1992-09-08)
A method is given by which the response of a rotating or non-rotating timoshenko beam can be determined, subjected to an accelerating fixed direction distributed surface force. The beam model includes the gyroscopically ...
Dynamic Instability Of Layered Anisotropic Circular Cylindrical Shells, Part I: Theoretical Development
(Elsevier, 1993-04-08)
A theoretical development is presented for the parametric resonance of layered anisotropic circular cylindrical shells. The shell's ends are clamped and subjected to axial loading consisting of a static part and a harmonic ...
Dynamic Instability Of Layered Anisotropic Circular Cylindrical Shells, Part II: Numerical Results
(Elsevier, 1993-04-08)
Numerical results for the parametric resonance response of layered anisotropic circular cylindrical shells are presented based on a theoretical development given in part I [1]. The principal regions of parametric resonance ...