Browsing through the countless Stanford exploration Project (SEP) reports, I was amazed to find a large number of quality papers that tackle the sensitive issue of anisotropy. The amazement stems from the fact that a hidden principle, which states “anisotropy is not an important”, existed in SEP. This principle evolved from statements like “If you believe in anisotropy!” and “avoid the two A’s ...

Workers’ compensation is the oldest social insurance program in the United States. The first law was passed in 1908 to provide cash and medical benefits for workrelated disability and death. This program now consists of 50 independent State operations and several Federal programs. The experience under workers’ compensation is of considerable importance to the Social Security Administration beca...

Accurate velocity estimation is essential to obtain a good migrated image and accurate resevoir attributes (Claerbout, 1999). The problem is that tomographic velocity estimation is an underdetermined problem. We can reduce the null space of the tomographic process by adding additional constraints, or more accurate goals, to the estimation. In early work (Clapp et al., 1997; Clapp and Biondi, 19...

The two-stage missing data interpolation approach of Claerbout (1999) (henceforth, the GEE approach) has been applied with great success (Fomel et al., 1997; Clapp et al., 1998; Crawley, 2000) in the past. The main strength of the approach lies in the ability of the prediction error filter (PEF) to find multiple, hidden correlation in the known data, and then, via regularization, to impose the ...

In this paper I estimate a SVAR model to study the transmission of UK shocks to the Irish economy over the period 1922-1979, using annual time series for CPI inflation and output growth. UK aggregate demand and supply shocks have large and significant impacts on Irish inflation, but smaller impacts on Irish real GDP growth. A historical decomposition indicates that UK aggregate demand shocks pl...

We analyze five prominent time series of global temperature (over land and ocean) for their common time interval since 1979: three surface temperature records (from NASA/GISS, NOAA/NCDC and HadCRU) and two lower-troposphere (LT) temperature records based on satellite microwave sensors (from RSS and UAH). All five series show consistent global warming trends ranging from 0.014 to 0.018 K yr−1. W...