Results 241 to 250 of about 193,810 (301)
Life on Mars? The physiological perspective
Experimental Physiology, EarlyView.
Ronan M. G. Berg, Damian M. Bailey
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Seismic response analysis of coal mine shaft tower structure considering PSSI effect under different sites. [PDF]
Sci RepHan L, Zhao S, Zhang Y, Ge N.
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Reviews of Geophysics, 1979
It is remarkable that seismology has progressed as far as it has while the knowledge in one vital area, that of the seismic source, has remained in a rather primitive state. However, if the recent research effort in the United States is any indication, this situation may be changing, because several promising lines of attack upon the problems of the ...
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It is remarkable that seismology has progressed as far as it has while the knowledge in one vital area, that of the seismic source, has remained in a rather primitive state. However, if the recent research effort in the United States is any indication, this situation may be changing, because several promising lines of attack upon the problems of the ...
openaire +3 more sources
GEOPHYSICS, 1981
We exploit the differences that exist between the radiation fields of a point source and an array to design a time‐separated marine seismic source array with desired power spectral and directional characteristics, whose far‐field time signature is known precisely from measurements.
Paul L. Stoffa, Anton L. Ziolkowski
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We exploit the differences that exist between the radiation fields of a point source and an array to design a time‐separated marine seismic source array with desired power spectral and directional characteristics, whose far‐field time signature is known precisely from measurements.
Paul L. Stoffa, Anton L. Ziolkowski
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The Journal of the Acoustical Society of America, 1981
An improved seismic prospecting system comprising the use of a closely spaced sequence of source initiations at essentially the same location to provide shorter objective-level wavelets than are obtainable with a single pulse. In a preferred form, three dynamite charges are detonated in the same or three closely spaced shot holes to generate a downward
Donald R. Hughes +2 more
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An improved seismic prospecting system comprising the use of a closely spaced sequence of source initiations at essentially the same location to provide shorter objective-level wavelets than are obtainable with a single pulse. In a preferred form, three dynamite charges are detonated in the same or three closely spaced shot holes to generate a downward
Donald R. Hughes +2 more
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The Journal of the Acoustical Society of America, 1989
An impulsive seismic generator is mounted on a swamp buggy suitable for operations both in a marshy environment and on land. The generator employs a target plate which may be lowered into a body of water or mud beneath the buggy so as to contact subsurfaces of varying degrees of firmness.
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An impulsive seismic generator is mounted on a swamp buggy suitable for operations both in a marshy environment and on land. The generator employs a target plate which may be lowered into a body of water or mud beneath the buggy so as to contact subsurfaces of varying degrees of firmness.
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GEOPHYSICS, 1987
A prototype model of a downhole controlled seismic source has been built and field tested. This instrument is a swept‐frequency, penumatically powered seismic source that operates in the 10 to 100 Hz range. This particular version is a vertical‐dipole source and generates vertically polarized shear waves.
H. C. Hardee +2 more
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A prototype model of a downhole controlled seismic source has been built and field tested. This instrument is a swept‐frequency, penumatically powered seismic source that operates in the 10 to 100 Hz range. This particular version is a vertical‐dipole source and generates vertically polarized shear waves.
H. C. Hardee +2 more
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Reviews of Geophysics, 1995
Seismic source modeling is taken to mean the modeling of seismograms to investigate kinematic properties of the earthquake source. Current trends such as the use of other data types (e.g. geodetic measurements of coseismic deformation) and the explicit consideration of source dynamics when modeling seismograms are beginning to blur this definition, but
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Seismic source modeling is taken to mean the modeling of seismograms to investigate kinematic properties of the earthquake source. Current trends such as the use of other data types (e.g. geodetic measurements of coseismic deformation) and the explicit consideration of source dynamics when modeling seismograms are beginning to blur this definition, but
openaire +1 more source