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Modulus dispersion and attenuation in tuff and granite
The effects of loading frequency, strain amplitude, and saturation on elastic moduli and attenuation have been measured in samples of the Topopah Spring Member welded tuff. Four different laboratory techniques have been used to determine Young`s modulus and extensional wave attenuation at frequencies ranging from 10{sup {minus}2} to 10{sup 6} Hz. The results are compared with data acquired for Sierra White granite under the same conditions. The modulus and attenuation in room dry samples remain relatively constant over frequency. Frequency dependent attenuation and modulus dispersion are observed in the saturated samples and are attributed to fluid flow and sample size. The properties of tuff were independent of strain amplitude in room dry and saturated conditions.
Date:
December 23, 1991
Creator:
Haupt, R. W.; Martin, R. J., III; Tang, X.; Dupree, W. J. & Price, R. H.
Object Type:
Report
System:
The UNT Digital Library
The Perry Daily Journal (Perry, Okla.), Vol. 98, No. 12, Ed. 1 Saturday, February 23, 1991
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 23, 1991
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 98, No. 192, Ed. 1 Monday, September 23, 1991
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 23, 1991
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Texas Jewish Post (Fort Worth, Tex.), Vol. 45, No. 21, Ed. 1 Thursday, May 23, 1991
Weekly Jewish newspaper from Fort Worth, Texas that includes local, state, and national news along with extensive advertising.
Date:
May 23, 1991
Creator:
Wisch, J. A. & Wisch, Rene
Object Type:
Newspaper
System:
The Portal to Texas History
De Leon Free Press (De Leon, Tex.), Vol. 101, No. 48, Ed. 1 Thursday, May 23, 1991
Weekly newspaper from De Leon, Texas that includes local, state, and national news along with advertising.
Date:
May 23, 1991
Creator:
Wilkerson, Gayle E.
Object Type:
Newspaper
System:
The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 91, No. 34, Ed. 1 Tuesday, April 23, 1991
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 23, 1991
Creator:
Lomenick, Rick
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 91, No. 163, Ed. 1 Monday, September 23, 1991
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 23, 1991
Creator:
Lomenick, Rick
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Pawhuska Journal-Capital (Pawhuska, Okla.), Vol. 81, No. 24, Ed. 1 Saturday, March 23, 1991
Semiweekly newspaper from Pawhuska, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 23, 1991
Creator:
Smith, Jodi
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Development of instrumentation for magnetic nondestructive evaluation
The use of failure-prone components in critical applications has been traditionally governed by removing such components from service prior to the expiration of their predicted life expectancy. Such early retirement of materials does not guarantee that a particular sample will not fail in actual usage. The increasing cost of such life expectancy based operation and increased demand for improved reliability in industrial settings has necessitated an alternate form of quality control. Modern applications employ nondestructive evaluation (NDE), also known as nondestructive testing (NDT), as a means of monitoring the levels and growth of defects in a material throughout its operational life. This thesis describes the modifications made to existing instrumentation used for magnetic measurements at the Center for Nondestructive Evaluation at Iowa State University. Development of a new portable instrument is also given. An overview of the structure and operation of this instrumentation is presented. This thesis discusses the application of the magnetic hysteresis and Barkhausen measurement techniques, described in Sections 1.3.1 and 1.3.2 respectively, to a number of ferromagnetic specimens. Specifically, measurements were made on a number of railroad steel specimens for fatigue characterization, and on specimens of Damascus steel and Terfenol-D for materials evaluation. 60 refs., 51 figs., …
Date:
September 23, 1991
Creator:
Hariharan, S.
Object Type:
Report
System:
The UNT Digital Library
The Comanche Chief (Comanche, Tex.), Vol. 119, No. 1, Ed. 1 Thursday, May 23, 1991
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
May 23, 1991
Creator:
Wilkerson, James C., III
Object Type:
Newspaper
System:
The Portal to Texas History
The Hopkins County Echo (Sulphur Springs, Tex.), Vol. 116, No. 34, Ed. 1 Friday, August 23, 1991
Weekly newspaper from Sulphur Springs, Texas that includes local, state, and national news along with advertising.
Date:
August 23, 1991
Creator:
Keys, Clarke & Davis, Mary Grant
Object Type:
Newspaper
System:
The Portal to Texas History
Chickasha Daily Express (Chickasha, Okla.), Vol. 100, No. 114, Ed. 1 Tuesday, July 23, 1991
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 23, 1991
Creator:
Plummer, George
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Tulia Herald (Tulia, Tex.), Vol. 83, No. 21, Ed. 1 Thursday, May 23, 1991
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
May 23, 1991
Creator:
Reynolds, Jim
Object Type:
Newspaper
System:
The Portal to Texas History
The Wynnewood Gazette (Wynnewood, Okla.), Vol. 89, No. 6, Ed. 1 Thursday, May 23, 1991
Weekly newspaper from Wynnewood, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 23, 1991
Creator:
Golden, Larry D.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Sanger Courier (Sanger, Tex.), Vol. 92, No. 21, Ed. 1 Thursday, May 23, 1991
Weekly newspaper from Sanger, Texas that includes local, state, and national news along with extensive advertising.
Date:
May 23, 1991
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 115, No. 50, Ed. 1 Thursday, May 23, 1991
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
May 23, 1991
Creator:
Lucas, Donnie A.
Object Type:
Newspaper
System:
The Portal to Texas History
Inventory of power plants in the United States 1990. [Contains glossary]
The purpose of this publication is to provide year-end statistics about electric generating units operated by electric utilities in the United States (the 50 States and the District of Columbia). The publication also provides a 10-year outlook of future generating unit additions. The Summary Statistics chapter contains aggregate capacity statistics at the national and various regional levels for operable electric generating units and planned electric generating unit additions. Aggregate capacity data at the national level are presented by energy source and by prime mover. Aggregate capacity data at the various regional levels are presented by prime energy source. Planned capacity additions in new units are summarized by year, 1991 through 2000. Additionally, this chapter contains a summary of electric generating unit retirements, by energy source and year, from 1991 through 2000. The chapter on Operable Electric Generating Units contains data about each operable electric generating unit and each electric generating unit that was retired from service during the year. Additionally, it contains a summary by energy source of electric generating unit capacity additions and retirements during 1990. Finally, the chapter on Projected Electric Generating Unit Additions contains data about each electric generating unit scheduled by electric utilities to start operation …
Date:
October 23, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The Optimist (Abilene, Tex.), Vol. 80, No. 18, Ed. 1, Wednesday, October 23, 1991
Weekly student newspaper from Abilene Christian University in Abilene, Texas that includes local, state and campus news along with advertising.
Date:
October 23, 1991
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Sachse Sentinel (Sachse, Tex.), Vol. 16, No. 43, Ed. 1 Wednesday, October 23, 1991
Weekly newspaper from Sachse, Texas that includes local news and advertising.
Date:
October 23, 1991
Creator:
Swanson, Don
Object Type:
Newspaper
System:
The Portal to Texas History
Stamford American (Stamford, Tex.), Vol. 70, No. 8, Ed. 1 Thursday, May 23, 1991
Weekly newspaper from Stamford, Texas that includes local, state, and national news along with advertising.
Date:
May 23, 1991
Creator:
Mathis, Chandra
Object Type:
Newspaper
System:
The Portal to Texas History
Levelland and Hockley County News-Press (Levelland, Tex.), Vol. 13, No. 24, Ed. 1 Sunday, June 23, 1991
Semiweekly newspaper from Levelland, Texas that includes local, state, and national news along with advertising.
Date:
June 23, 1991
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Polk County Enterprise (Livingston, Tex.), Vol. 109, No. 41, Ed. 1 Thursday, May 23, 1991
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
May 23, 1991
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 77, No. 189, Ed. 1 Tuesday, April 23, 1991
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 23, 1991
Creator:
Lake, Charles S.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Goldthwaite Eagle (Goldthwaite, Tex.), Vol. 97, No. 44, Ed. 1 Thursday, May 23, 1991
Weekly newspaper from Goldthwaite, Texas that includes local, state, and national news along with extensive advertising.
Date:
May 23, 1991
Creator:
Bridges, G. Frank
Object Type:
Newspaper
System:
The Portal to Texas History