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## Built-up reinforced concrete piles used in Murmansk

### Soil Mechanics and Foundation Engineering (1976-01-01) 13: 3-4 , January 01, 1976

## Publications received

### Boundary-Layer Meteorology (1976-08-01) 10: 523-524 , August 01, 1976

## A comparison of two models of ternary excess free energy

### Contributions to Mineralogy and Petrology (1976-03-01) 57: 71-81 , March 01, 1976

Wohl's model and Kohler's model are two empirical excess free energy of mixing models which have been formulated for ternary solutions. The two models are identical when the binary systems are regular solution model systems. When it is assumed that the binary systems are subregular model systems the two *ternary* models differ. This difference is examined using the subregular model parameter values suggested by Saxena to approximate the experimental work of Seck on coexisting feldspars in the system Anorthite-Albite-Orthoclase at 900° C and 0.5 Kb. For these conditions Wohl's model is closer to the experimental data than Kohler's model in generating the position of the solvus isotherm and is better in matching the shape of the albite partitioning curve. With regard to the slope of the tie-lines, Kohler's model provides a better fit to the experimental results than Wohl's model. Experimentally determined activities for this system are not yet available so that there is no absolute way of selecting the model which would provide the most realistic activities.

A ternary solvus can be completely displayed on one diagram when two sets of contours are overlain on a ternary plot. One set of contours consists of isotherms while the other set consists of icophases which are usually at a reasonable angle to the isotherms. Not only are icophases a clear way of coding tie-line information, they also assist in the positioning of the consolute or critical line. The simple new activity matching algorithm that is used in the comparative calculations has the ability to produce icophases directly.

## Surface waves in media having lateral inhomogeneities

### pure and applied geophysics (1976-09-01) 114: 833-843 , September 01, 1976

### Summary

On the basis of Alsop's method (1966), approximated reflection and transmission coefficients are obtained for surface waves obliquely incident at a vertical discontinuity. Rayleigh and Love waves are arranged in such a way that they form a homogeneous eigenfunction system and their mutual conversion into each other is compatible with this theory. The structure of the eigenvalue equation is responsible for the mathematical complications in many surface wave problems. On the basis of a computer routine, first result concerning the angular dependence of the reflection and transmission coefficients including mode conversion are presented. The problem of phase jump is discussed. A comparison of theoretical and experimental results shows the applicability of Alsop's method for 90°-corners, too.

## International Seminar on New Methods in Space Geodesy

### Bulletin géodésique (1976-06-01) 50: 193-195 , June 01, 1976

## Physical prerequisites for monitoring rock strength by the acoustic method

### Soviet Mining (1976-07-01) 12: 377-380 , July 01, 1976

## Dynamic properties of the probe for measuring the temperature gradient

### Studia Geophysica et Geodaetica (1976-06-01) 20: 186-192 , June 01, 1976

### Summary

The paper analyses the behaviour of a probe for direct measurements of temperature increase with depth in boreholes and derives transient characteristics of a gradient probe using the electrothermal analogy.

## Surface wave and seismotectonic studies in the Mediterranean area

### pure and applied geophysics (1976-09-01) 114: 791-796 , September 01, 1976

## Extraction operations in the “Oktyabr” mine

### Soviet Mining (1976-09-01) 12: 526-531 , September 01, 1976

## Bicubic spline smoothing of two-dimensional geophysical data

### Studia Geophysica et Geodaetica (1976-06-01) 20: 168-177 , June 01, 1976

### Summary

A computational method for fitting smoothed bicubic splines to data given in a regular rectangular grid is suggested. The one-dimensional spline fit has well defined smoothness properties. These are duplicated for a two-dimensional approximation by solving the corresponding variational problem. The complete algorithm for computing the functional values and its derivatives at arbitrary points is presented. The posibilities of the method are demonstrated on an example from geomagnetic surveys.