The Royal Society

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A preliminary investigation of the use of focused laser beams for minimum ignition energy studies
The Royal Society - Tập 321 Số 1544 - Trang 41-52 - 1971
F.J. Weinberg, J. Wilson
The plasma produced by focusing a passively Q-switched 30 J ruby laser beam is studied as regards its suitability for minimum ignition energy measurement. By comparison with electric spark discharges, it would appear to offer shorter times and smaller volumes of the initiating plasma, as well as freedom from energy losses to electrodes and elsewhere within the circuit. The growth of the in...... hiện toàn bộ
A formalism for the indirect Auger effect. I
The Royal Society - Tập 347 Số 1651 - Trang 547-564 - 1976
Dorothy Hill, P. T. Landsberg
A general formalism has been developed for the calculation of band-band Auger recombination and impact ionization rates in diamond and zinc blende type structures. The energy gap involved in the transition must be of order 1eV or greater, at room temperature, for direct gaps but is arbi­trary for indirect gaps. A recombination coefficient of 28.1 x 10 -32...... hiện toàn bộ
Continuous distributions of dislocations: a new application of the methods of non-Riemannian geometry
The Royal Society - Tập 231 Số 1185 - Trang 263-273 - 1955
B. A. Bilby, R. Bullough, Edwin Smith
When describing a crystal containing an arbitrary distribution of dislocation lines it is often convenient to treat the distribution as continuous, and to specify the state of dislocation as a function of position. Formally, however, there is then no ‘good crystal’ anywhere, and difficulties arise in defining Burgers circuits and the dislocation tensor. The dislocated state ma...... hiện toàn bộ
Physical properties of layer structures : optical properties and photoconductivity of thin crystals of molybdenum disulphide
The Royal Society - Tập 273 Số 1352 - Trang 69-83 - 1963
R. F. Frindt, A. D. Yoffe
Very thin crystals of molybdenum disulphide, less than 100 Å thick, have been prepared by cleavage. The optical absorption spectra in the thickness range several micrometres to less than 100 Å are similar. Absorption coefficients have been measured to values close to 10 6 cm -1 . The abso...... hiện toàn bộ
Experimental observations of the transition to detonation in an explosive gas
The Royal Society - Tập 295 Số 1440 - Trang 13-28 - 1966
P. A. Urtiew, A. K. Oppenheim
The experimental study of transition to detonation has been enhanced recently by two novel techniques. One exploits simply the fact that a self-sustained detonation front, unlike any other wave associated with the transition process, is capable of leaving imprints on the wall along which it travels. The other is based on the adaptation of an amplitude modulated, giant pulse, laser system a...... hiện toàn bộ
Residual flows and elevations in the southern North Sea
The Royal Society - Tập 359 Số 1697 - Trang 189-228 - 1978
D. Prandle
The distribution of residual flow and the variation in mean sea level in the southern North Sea have been simulated by using a two-dimensional, vertically integrated, numerical model. The tidal residuals (i.e. the nonoscillatory tidal component) associated with the principal, M 2 , constituent were calculated from a fully nonlinear ...... hiện toàn bộ
Some further measurements of upper atmospheric ionization
The Royal Society - Tập 150 Số 871 - Trang 685-708 - 1935
E.V. Appleton, Robert T. Naismith
In a previous communication an account was given of some measurements of upper atmospheric ionization in south-east England made by the critical frequency method. These measurements were confined principally to the Kennelly-Heaviside region (region E) and showed that the maximum ionization at that level in the ionosphere exhibits a diurnal and seasonal variation such as may be explained in...... hiện toàn bộ
Natural evaporation from open water, bare soil and grass
The Royal Society - Tập 193 Số 1032 - Trang 120-145 - 1948
H. L. Penman
Two theoretical approaches to evaporation from saturated surfaces are outlined, the first being on an aerodynamic basis in which evaporation is regarded as due to turbulent transport of vapour by a process of eddy diffusion, and the second being on an energy basis in which evaporation is regarded as one of the ways of degrading incoming radiation. Neither approach is new, but a combination...... hiện toàn bộ
Gauge invariance of the g tensor
The Royal Society - Tập 271 Số 1346 - Trang 424-434 - 1963
Anthony J. Stone
The usual theory of g values cannot be applied to molecules as it is not gauge-invariant. Dirac’s wave equation is used to derive a gauge-invariant theory, and a general expression is obtained for the principal g values of a molecule in an orbitally non-degenerate state. ...
The theory of scattering by a rigid rotator
The Royal Society - Tập 256 Số 1287 - Trang 540-551 - 1960
A. M. Arthurs, A. Dalgarno
A theory of scattering by a rigid rotator in which the coupling between the different energy levels of the rotator is taken into account is formulated and explicit expressions, which do not depend upon the magnetic quantum numbers, are obtained for various elastic and inelastic cross-sections. Several approximations are described, particular attention being paid to the scattering of heavy ...... hiện toàn bộ
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