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271.
Nonradial oscillations of certain models of the generalized Roche series have been investigated numerically to further understand the nature of the eigen-values and the eigen-functions of the modes of nonradial oscillations of stellar models. 相似文献
272.
The averaging technique of Kippenhahn and Thomas (1970) has been used in conjunction with Kopal's method of evaluating various parameters on the Roche equipotentials to determine the effects of rotation and tidal distortions on the periods of small adiabatic radial and nonradial modes of oscillations of polytropic models of the stars. 相似文献
273.
The averaging technique of Kippenhahn and Thomas has been used in conjunction with Kopal's method of evaluating various parameters on the Roche equipotentials, to determine the effects of rotation and tidal distortions on the shapes and structures of the polytropic models of the stars. 相似文献
274.
In the light of surface heat-flow observations, as well as other related geological and geophysical data, the origin of the Deccan basalts has been examined. The Indian lithosphere, after its detachment from Gondwanaland, apparently traversed a rising plume at La Réunion, which virtually bored through the lithosphere to emerge as the Deccan Trap volcanism on the surface. Subsequent volcanic and plutonic activity appears to have continued not only up to the Oligocene, as is indicated by the alkaline magmatic activity observed near the junction of the three prominent features — the West Coast faults, the Narmada-Son-Tapti lineament, and the Cambay Graben — but also up to the Mio-Pliocene, as indicated by the heat flow and gravity data over the Cambay Graben. The dyke-swarms and sills, which are mostly post-trappean, evolved from the lithosphere after the Indian Plate moved away from the hot spot. 相似文献
275.
G. Ramadass I. Arunkumar S. M. Varaprasada Rao N. L. Mohan N. Sundararajan 《Journal of Earth System Science》1987,96(3):211-219
The auxiliary functions, namely amplitude, phase, envelope and instantaneous frequency of Hilbert transform over gravity anomalies
of 2-D sphere, vertical fault block and horizontal circular cylinder are studied. The characteristics of these functions are
established in locating and identifying the sources. The method is illustrated with a theoretical example in each case and
supported by field data of gravity anomaly over Humble dome and spherical model of the Satak-Mansar area, Nagpur District,
India. 相似文献
276.
A simple method to interpret gravity gradients over a thin infinite dipping sheet is discussed. The Hilbert transform is used to compute the vertical gradient from the horizontal gradient of the gravity field. The method is illustrated with a theoretical example. 相似文献
277.
Summary The method of continuation has been used to obtain the master curves for gravity and magnetic anomalies caused by spherical bodies. The procedure to calculate the depth of burial and radius of spherical bodies has been outlined. 相似文献
278.
Gopi Nath Sarkar 《Pure and Applied Geophysics》1964,58(1):41-48
Summary It has been noted by several observers that no Love-wave spectrum is complete in the sense that it contains all the periods. The reason for this has been sought for in the presence of a low-velocity layer. 相似文献
279.
The area around Panwari town, Hamirpur district, Uttar Pradesh, faces acute water scarcity and chronically drought prone. The groundwater resources in the area have not been fully exploited. The present study was undertaken to evaluate the groundwater prospective zones. Landsat TM and IRS-1A LISS-II data have been used to differentiate different hydromorphogeological units and to delineate the major trends of lineaments. The digitally enhanced False Colour Composite, Principal Component Analysis and Edge Detections were useful for better correlation. The digital enhancement was helpful with identification of faint lineaments. In addition, the boundaries of various lands forms were better discriminable on the digitally enhanced products. The deeply and moderately weathered buried pediplains are the most potential zones for groundwater targeting. Occurrence of lineaments in such zones is also a favourable indicator. A number of promising groundwater well sites have been located in the pediplains. 相似文献
280.
Mohan J 《Population geography : a journal of the Association of Population Geographers of India》1987,9(1-2):56-61
The author discusses overpopulation as it affects public mental health by reviewing relevant literature in the fields of psychology and demography. The impact of population density in India is addressed. 相似文献