Michael Reddy - Academia.edu (original) (raw)
Papers by Michael Reddy
Open-File Report, 2001
In the mid 1980s, the National Acid Precipitation Assessment Program (NAPAP), in cooperation with... more In the mid 1980s, the National Acid Precipitation Assessment Program (NAPAP), in cooperation with the National Park Service (NPS) and the U.S. Geological Survey (USGS), initiated a Materials Research Program (MRP) that included a series of field and laboratory studies with the broad objective of providing scientific information on acid rain effects on calcareous building stone. Among the several effects investigated, the chemical dissolution of limestone and marble by rainfall was given particular attention because of the pervasive appearance of erosion effects on cultural materials situated outdoors. Runoff solution volume statistics Volume, averages (figure 1(avg)). The runoff volume is the key variable linking the observed concentrations to mass loss. Figure 1(avg) shows a comparison of the blank-runoff volume averaged over all observed events for each MRP site. Detailed statistics, including the range, mean values, standard deviation, and number of samples for the runoff-solution volumes for the blank, limestone, and marble slabs are provided in tables 5, 6, and 7 in the appendix to this report. Volume, histograms and chi-square test (figures 1 to 15). With the exception of figures 7 to 9 (NJ site), a general characteristic of the volume histograms is that their distributions somewhat conform to a gamma distribution. The statistical deviation of the runoff-volume data collected for the limestone, marble and blank slabs at the NJ site from the distributions of runoff-volume data from the DC, NY, NC, and OH sites is evidence of the corruption of the NJ data set by a significant number of entries. 8 In addition, there is a consistent statistical disparity among the limestone, marble, and blank distributions at all of the field sites. In general, the gamma distributions for the limestone volume data are more exponential-like 9 than are the distributions for marble-volume or blank-volume data. Note that the ranges and the mean values for the limestone volume measurements are significantly less than the ranges and means for the marble or blank volume measurements. These findings are consistent with the imbibition of about 1.5 L of rain by the limestone slabs. Volume (figures 16 to 20):(a) limestone vs. marble; (b) limestone, marble, and blank (sorted on blank); and (c) marble (sorted on marble volume). The plots in figures 16 to 20 reveal the degree of correlation and the extent of statistical consistency among the runoff volumes from the
Hydrological Processes, 2006
SIL Proceedings, 1922-2010, 1975
Journal of Colloid and Interface Science, 1981
ABSTRACT
Interactions between sediments and fresh water, 1976
Advances in Crystal Growth Inhibition Technologies
ABSTRACT
ACS Symposium Series, 1979
ABSTRACT
Data Series, 2009
Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:°F =(1... more Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:°F =(1.8×°C)+32 Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:°C =(°F-32)/1.8 Altitude, as used in this report, refers to distance above the vertical datum. Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88). Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).
Journal of Physics E: Scientific Instruments, 1972
ABSTRACT
Atmospheric Environment. Part A. General Topics, 1990
ABSTRACT
Society of Petroleum Engineers Journal, 1974
Reviewed here is the kinetics of crystal growth of sparingly soluble minerals such as calcium car... more Reviewed here is the kinetics of crystal growth of sparingly soluble minerals such as calcium carbonate, calcium sulfate, and barium sulfate, which frequently cause scaling problems in oil fields. For all three electrolytes, the crystal growth is surface controlled and follows a second-order rate law with an activation energy for the growth process of 10 to 20 kcal mol(-1). The growth of calcium sulfate seeded crystal above 100 degrees C demonstrates the importance of characterizing polymorphic transformation processes. Phosphonate scale inhibitors show differing modes of Phosphonate scale inhibitors show differing modes of imbibition in systems precipitating CaCO3 and CaSO4. Introduction The formation of crystals of scale-forming, sparingly soluble minerals continues to be a very serious problem for the petroleum engineer. Scaling arises from a specific set of geological, physical, and chemical conditions. Geological factors such as ground water circulation and mineral composition ...
Eos, Transactions American Geophysical Union, 1989
Open-File Report, 2001
In the mid 1980s, the National Acid Precipitation Assessment Program (NAPAP), in cooperation with... more In the mid 1980s, the National Acid Precipitation Assessment Program (NAPAP), in cooperation with the National Park Service (NPS) and the U.S. Geological Survey (USGS), initiated a Materials Research Program (MRP) that included a series of field and laboratory studies with the broad objective of providing scientific information on acid rain effects on calcareous building stone. Among the several effects investigated, the chemical dissolution of limestone and marble by rainfall was given particular attention because of the pervasive appearance of erosion effects on cultural materials situated outdoors. Runoff solution volume statistics Volume, averages (figure 1(avg)). The runoff volume is the key variable linking the observed concentrations to mass loss. Figure 1(avg) shows a comparison of the blank-runoff volume averaged over all observed events for each MRP site. Detailed statistics, including the range, mean values, standard deviation, and number of samples for the runoff-solution volumes for the blank, limestone, and marble slabs are provided in tables 5, 6, and 7 in the appendix to this report. Volume, histograms and chi-square test (figures 1 to 15). With the exception of figures 7 to 9 (NJ site), a general characteristic of the volume histograms is that their distributions somewhat conform to a gamma distribution. The statistical deviation of the runoff-volume data collected for the limestone, marble and blank slabs at the NJ site from the distributions of runoff-volume data from the DC, NY, NC, and OH sites is evidence of the corruption of the NJ data set by a significant number of entries. 8 In addition, there is a consistent statistical disparity among the limestone, marble, and blank distributions at all of the field sites. In general, the gamma distributions for the limestone volume data are more exponential-like 9 than are the distributions for marble-volume or blank-volume data. Note that the ranges and the mean values for the limestone volume measurements are significantly less than the ranges and means for the marble or blank volume measurements. These findings are consistent with the imbibition of about 1.5 L of rain by the limestone slabs. Volume (figures 16 to 20):(a) limestone vs. marble; (b) limestone, marble, and blank (sorted on blank); and (c) marble (sorted on marble volume). The plots in figures 16 to 20 reveal the degree of correlation and the extent of statistical consistency among the runoff volumes from the
Hydrological Processes, 2006
SIL Proceedings, 1922-2010, 1975
Journal of Colloid and Interface Science, 1981
ABSTRACT
Interactions between sediments and fresh water, 1976
Advances in Crystal Growth Inhibition Technologies
ABSTRACT
ACS Symposium Series, 1979
ABSTRACT
Data Series, 2009
Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:°F =(1... more Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:°F =(1.8×°C)+32 Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:°C =(°F-32)/1.8 Altitude, as used in this report, refers to distance above the vertical datum. Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88). Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).
Journal of Physics E: Scientific Instruments, 1972
ABSTRACT
Atmospheric Environment. Part A. General Topics, 1990
ABSTRACT
Society of Petroleum Engineers Journal, 1974
Reviewed here is the kinetics of crystal growth of sparingly soluble minerals such as calcium car... more Reviewed here is the kinetics of crystal growth of sparingly soluble minerals such as calcium carbonate, calcium sulfate, and barium sulfate, which frequently cause scaling problems in oil fields. For all three electrolytes, the crystal growth is surface controlled and follows a second-order rate law with an activation energy for the growth process of 10 to 20 kcal mol(-1). The growth of calcium sulfate seeded crystal above 100 degrees C demonstrates the importance of characterizing polymorphic transformation processes. Phosphonate scale inhibitors show differing modes of Phosphonate scale inhibitors show differing modes of imbibition in systems precipitating CaCO3 and CaSO4. Introduction The formation of crystals of scale-forming, sparingly soluble minerals continues to be a very serious problem for the petroleum engineer. Scaling arises from a specific set of geological, physical, and chemical conditions. Geological factors such as ground water circulation and mineral composition ...
Eos, Transactions American Geophysical Union, 1989