Anisotropy parameters are obtained by anisotropic velocity analysis performed on Blackfoot P-wave reflection-seismic data, in combination with sonic-log data. First, the line was processed with ProMAX seismic data-processing software using a sequence of conventional algorithms without taking anisotropy into account, in order to choose proper analysis points and horizons with confidence. Then, a...

In this pedagogically motivated work, the process of migration in reflection seismics has been considered from a rigorously mathematical viewpoint. An inclined subsurface reflector with a constant dipping angle has been shown to cause a shift in the normal moveout equation, with the peak of the moveout curve tracing an elliptic locus. Since any subsurface reflector actually has a non-uniform sp...

Stacking spectra provide maximum-likelihood estimates for the stacking velocity, or for the ray parameter, of well separated reflections in additive white noise. However, the resolution of stacking spectra is limited by the aperture of the array and the frequency of the data. Despite these limitations, parametric spectral estimation methods achieve better resolution than does stacking. To impro...

Abstract Purpose The decline of school motivation over a year is common issue that can have negative impacts on academic achievement and children's health. Education outside the classroom (EOtC) has been shown to positively affect intrinsic physical activity (PA) in previous studies. However, relationship between PA during EOtC remains unclear. This study aims investigate association what role ...

doppler-derived myocardial performance index (mpi) , defined as the s um of isovolumetric contraction and relaxation durations divided by ejection time, is an easily measured and reproducible index that shows both systolic and diastolic myocardial function. the goal of this study was to define normal values of right ventricular mpi in neonates in the first 48 to 72 hours of life. fifty-one quie...

statement of problem: due to the appearance of palatal height difference in orthodontic patients we decided to carry out this study. purpose: the purpose of this research was to determine palatal height in persons with normal occlusion and different malocclusions (class i, ii div i and iii) and comparing them with each other. materials and methods: in this cross sectional research, 240 subjects...

doppler-derived myocardial performance index (mpi), defined as the sum of isovolumetric contraction and relaxation durations divided by ejection time, is an easily measured and reproducible index that shows both systolic and diastolic myocardial function. the goal of this study was to define normal values of right ventricular (rv) mpi in neonates in the first 48 to 72 hours of life. fifty-one q...

pth is the most important factor which control calcium homeostasis in the body in this study we tried to determine the normal range of pth and vitamin d with examining the relation between pth and bone density and vitamin d on the base of bones biological changes. our subjects were, 20 to 69 years-old men and women of tehran. serum volume of pth and vitamin d in different decades of life had si...

Earthquake phase association algorithms aggregate picked seismic phases from a network of seismometers into individual earthquakes and play an important role in earthquake monitoring. Dense networks improved picking methods produce massive data sets, particularly for swarms aftershocks occurring closely time space, making challenging problem. We present new method, the Gaussian Mixture Model As...