Traditional reflection statics programs use model traces built from stacks of nearby traces. Using cross-correlations between nearby prestack traces avoids the problems associated with the model building process. Cross-correlations between trace pairs positioned in orthogonal directions with respect to structure, residual NMO, and the shot and receiver terms allow the full statics problem to be...

We present a theory to generate pseudo-primary shot gathers from multiple and primary reflections by performing a surface-consistent cross-correlation. The estimated pseudoprimaries exhibit the same kinematics as the original dataset with few transformation artifacts. We demonstrate that pseudo-primaries can accurately estimate missing traces as long as the gaps are within the acquisition sprea...

A guard trace placed near a signal line reduces commonmode radiation from a printed circuit board. The reduction effect is evaluated by the imbalance difference model, which was proposed by the authors, when the guard trace has exactly the same potential as the return plane. However, depending on interval of ground connection of the guard trace, the radiation can increase when the guard trace r...

Introduction Traditionally, the analysis of seismic data involved looking for continuous events on seismic data, from which structural and stratigraphic features could be mapped. However, we are also interested in mapping discontinuous features such as faults and fractures. A method for identifying these discontinuities was first introduced by Bahorich and Farmer (1995) and called the coherency...

[1] Geomagnetically induced currents (GICs) can disrupt power grid operations, causing significant interference for many people; therefore, predictions of ground-based magnetic perturbations and their time derivatives are quite important. This study quantifies how well the University of Michigan’s Global MHD code predicts approximately 150 ground-based magnetometer traces for a number of storm-...

Seismic interferometry is the process of generating new seismic traces from the crosscorrelation, convolution or deconvolution of existing traces. One of the starting assumptions for deriving the representations for seismic interferometry by crosscorrelation is that there is no intrinsic loss in the medium where the recordings are performed. In practice, this condition is not always met. Here, ...

Information spillover and liquidity externality across securities is of practical importance to both practitioners and policy makers. We empirically examine how information spillover facilitates liquidity externalities between the equity and corporate bond markets. An event study was conducted by comparing the change of liquidity of stocks whose corporate bonds are TRACE-eligible with that of n...

The invariants of a pair of quadratic forms and a pair of coplanar conies are revisited following [1, 5, 2]. For a given pair of conies, with their associated matrices Ci and C2, we show that Trace(CjCi), Trac^C^ C2) and |Ci |/|C21 are only invariants of associated quadratic forms, but not invariants of the conies. Two of true invariants of the conies are Trace(C~Ci) |C->I . Trace<C~ C2) |C, I ...