The present study was conducted to determine peak ground acceleration (PGA) over bedrock in probabilistic analysis methods for the seismic hazard and uniform hazard spectra at different hazard levels for Esfahan city. A series of statistics containing historical and instrumental seismic data covering from the 8th century A.D. to the now up to a radius of 200 km was employed and seismic sources ...

tehran, the capital of iran, is under the threat of large magnitude earthquakes (above 7) located on known active faults. previous studies on the effect of local surface geology on earthquake ground motion using 1d calculation of sh transfer function (jafari et al., 2001; jica & cest, 2000) and using experimental methods (haghshenas, 2005) based on earthquake and ambient noise vibration recordi...

Understanding englacial and subglacial structures is a fundamental method of inferring ice sheets’ historical evolution surface mass balance. The internal layer continuity index the basal roughness are key parameters indicators for speculation relationship between sheet’s structure or bottom flow. Several methods have been proposed in past two decades to quantitatively calculate geometry ice–be...

nature displays profound preference for certain specific ratios to design her life-forms. these are geometric relationships that are transcendent and originated from sacred geometry. the view that geometry had a ritual origin is a part of a wider view that civilization itself had a ritual origin, and therefore the history of utilization of sacred geometry by man goes back to many centuries ago....

the subject of geometry and proportions has been regarded as an issue which has a close relationship with architecture. since the entire universe, living beings and the human geometry can be seen clearly, that’s why our unconscious essence has accustomed to these proportions whereby reflection of this mentality can be seen in the architect’s hands and thought in the architecture. it can witness...

[1] Tracer buoyancy has been shown to influence breakthrough from two-well tracer experiments conducted in porous media. Two-well tracer experiments are presented from fractured crystalline bedrock, in which the specific gravity of the tracer injectate varied from 1.0002 to 1.0133. Under the forced hydraulic conditions imposed, no difference in breakthrough was noted for the three experiments. ...

i Preface iii Summary v Introduction 1 Measurement techniques employed 3 Ground 3 Airborne 3 Magnetometer survey 4 Results 4 Ground control study 4 VLF survey 8 Bedrock geology and resistivity 8 Aeromagnetic survey results 13 Conclusions 13 Literature cited 13 Appendix A. Theory of electromagnetic resistivity si rveying 15 Appendix B. Magnetic surveying 19