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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
An overview of shallow seismic survey methods
 Buneš, Josef ; Vilhelm, Jan (advisor) ; Valenta, Jan (referee)
The objective of this thesis is brief overview of shallow seismic survey and its applications. Particularly they are refraction, reflection, borehole seismology, surface wave methods and applications of their principles in solving problems in near surface. First part of the thesis deals with basics of seismic survey methods. Next part is focused on specification of shallow survey and its application on specific tasks. The results of this thesis is review of methods and tasks that we can already solve and confirmation of untapped potential of shallow seismic methods. Keywords: shallow seismic, refraction, reflection, seismic survey
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Application and interpretation of seismic surface waves in broad frequency range
 Gaždová, Renata ; Vilhelm, Jan (advisor) ; Novotný, Oldřich (referee) ; Holub, Karel (referee)
Submitted Ph.D. thesis is concerning the application and interpretation of seismic surface waves in a broad range of frequencies and scales. Using surface waves as a supplement to the methods dealing with body waves seems to be worth the effort. Surface wave interpretation can be used to obtain new information about the studied medium and simultaneously it can overcome, in some cases, the limitations of other seismic techniques. Moreover, surface waves are usually present on measured records and hence for its usage it is not necessary to modify the standard measuring procedures. One of the results of this thesis is an original algorithm for dispersive waveform calculation. The program works in an arbitrary range of frequencies and scales. The input parameter for the calculation is the dispersion curve. In this point the algorithm differs from all other approaches used so far. Algorithm is based on a summation of frequency components with shifts corresponding to the velocity dispersion and distance. The resulting waveform only contains an individual dispersive wave of the selected mode, thus being particularly suitable for testing of methodologies for dispersive wave analysis. The algorithm was implemented into the program DISECA. Furthermore, a new procedure was designed to calculate the dispersion...
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