And while I have sought to shew the naturalist how a few mathematical concepts and dynamical principles may help and guide him, I have tried to shew the mathematician a field for his labour—a field which few have entered and no man explored. Here may be found homely problems, such as often tax the highest skill of the mathematician, and reward his ingenuity all the more for their trivial associ...

The purpose of this paper is to present a comprehensive budget conscious security plan for smaller enterprises that lacksecurity guidelines.The authors believethis paper will assist users to write an individualized security plan. In addition to providing the top ten free or affordable tools get some sort of semblance of security implemented, the paper also provides best practices on the topics ...

Differential semblance velocity analysis flattens image gathers automatically by minimizing the mean square difference of neighboring traces in an image volume. Implementations based on normal moveout correction as “imaging” method are relatively fast, can accomodate arbitrary acquisition geometry, and can be organized to output 1D, 2D, or 3D interval velocity models. Within the limits of its i...

We analyze seismic waves excited by small Strombolian explosions to understand the source process of volcanic explosions. deployed five broadband seismometers at only 100–300 m away from active craters Stromboli volcano, Italy. Moment tensor inversion entire signals in 0.05–0.2 Hz band locates a depth 170 and 150–200 west/southwest crater where acoustic are excited. Contrary, sources 0.2–0.5 0....

Convection in the liquid outer core of Earth is driven by thermal and chemical perturbations. The main purpose this study to examine impact double-diffusive convection on magnetic field generation means 3D global geodynamo models, so-called "top-heavy" regime convection, when both compositional background gradients are destabilizing. Using a linear eigensolver, we begin confirming that, compare...

seismic attributes are very useful in seismic data interpretation. one of these attributes is the coherency attribute. seismic coherency is a complex trace and a geometrical attribute that is applied to a 3d cube of seismic data. it is a measure of lateral changes in acoustic impedance caused by the variation in structure, stratigraphy, lithology, porosity, and the presence of hydrocarbons. whe...

Azimuthal anisotropy is common in layered basins with strong folding and fracturing effects. Traditional processing on individual azimuths usually yields images with inconsistent depths. In this paper, we propose to use an image obtained from one azimuth to constrain the image-space velocity analysis on other azimuths. This method directly tackles the differences in anisotropic parameters among...