The Gutenberg–Richter law and the Omori are both characterized by a scaling behavior. However, their relation is still an open question. Although several hypotheses have been formulated, comprehensive geophysical mechanism missing to explain observed variability of exponents b-value p-value, e.g., correlating seismic cycle statistical seismology tectonic processes. In this work, model for descr...

Objective: The aim of this study was to evaluate the influences of reconstruction and attenuation correction on the differences in the radioactivity distributions in 123I brain SPECT obtained by the hybrid SPECT/CT device. Methods: We used the 3-dimensional (3D) brain phantom, which imitates the precise structure of gray mater, white matter and bone regions. It was filled with 123I solution (20...

Introduction: Extensional fault scarps on Mars bear a striking resemblance to fault scarps on Earth, including geometric features such as horsts, grabens, relay ramps and breached relay ramps, en echelon arrangement of faults and grabens, and scaling characteristics [1], [2], [3]. Other surface features associated with extensional faulting on Mars are lines (" chains ") of circular topo-graphic...

The Newport-lnglewood fault zone (NIF) strikes northwest along the western margin of the Los Angeles basin in southern California. The seismicity (1973 to 1985) of M, _-> 2.5 that occurred within a 20-kin-wide rectangle centered on the NIF extending from the Santa Monica fault in the north to Newport Beach in the south is analyzed. A simultaneous full inversion scheme (VELEST) is used to invert...

introduction artificial and natural radionuclides are found in diverse environmental compartments, such as water, soil, rocks, vegetables, animals, and human body tissues. as such, humans and environments are at constant exposure of these radiation types. in this research investigated specific activities of radionuclide and dose assessment of some species of mushrooms. materials and methods in ...

gamma-rays emitted from the ground surface relate to the primary mineralogy and geochemistryof the bedrock, and the secondary weathered materials. this information can contribute significantly to anunderstanding of the geochemical and pedogenetic history of a region. the main aim of this paper was to study the relationship between ground gamma-ray data and basement geochemistry in the lese catc...

in this study, natural and artificial radioactivity concentration in agaricus bispora (nourished mushroom) and their composts, cantharellus cibarius and coprinus micaceuc (wild species) were determined. samples were collected from sahne and two kinds of wild mushroom species from songhor koliai township gardens all located in kermanshah province were collected. hpge gamma ray spectrometry syste...