Douglas E. Allen

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Increases in the concentrations of atmospheric greenhouse gases, carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O) due to human activities are associated with global climate change. CO2 concentration in the atmosphere has increased by 33% (to 380 ppm) since 1750 ad, whilst CH4 concentration has increased by 75% (to 1,750 ppb), and as the global(More)
Experiments were conducted to determine the solubility of CO2 in a natural brine solution of the Oriskany formation under elevated temperature and pressure conditions. These data were collected at temperatures of 22 and 75 degrees C and pressures between 100 and 450 bar. Experimentally determined data were compared with CO2 solubility predictions using a(More)
When measuring airborne activity of isotopes with very low annual limit of intakes, interference from natural radioactivity presents an obstacle to obtaining timely results. One method for solving this problem is to perform two separate counts of the sample and mathematically strip-out the contribution from the short-lived component. While this method can(More)
Investing and consuming may not be so different as traditional economic theory has understood them. The consumer research literature has begun to view consumption not simply as rational decisionmaking, but as a more multisensory activity in which emotion and fantasy play important, if not essential, roles. This new perspective has been extended by Holt(More)
We comment on a recent paper by Beaver, McAnally and Stinson (1997), drawing attention to the fact that their method ignores some recent developments in timeseries econometrics. We apply a bi-variate vector autoregression framework to price and earnings data of listed US companies and the S&P 500 index to capture the dynamics of this system of equations.(More)
CO2 solubility data in the natural formation brine, synthetic formation brine, and synthetic NaCl+CaCl2 brine were collected at the pressures from 100 to 200 bar, temperatures from 323 to 423 K. Experimental results demonstrate that the CO2 solubility in the synthetic formation brines can be reliably represented by that in the synthetic NaCl+CaCl2 brines.(More)
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