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Articles 72031 - 72060 of 75034
Full-Text Articles in Engineering
A Minimum-Cost And Environmentally-Safe Program Of Herbicide Maintenance For Indiana Roadsides : Technical Paper, D. James Morré
A Minimum-Cost And Environmentally-Safe Program Of Herbicide Maintenance For Indiana Roadsides : Technical Paper, D. James Morré
JTRP Technical Reports
No abstract provided.
Evaluation Of Parameters Significantly Influencing The Performance Of Continuously Reinforced Concrete Pavements : Technical Paper, Asif Faiz, Eldon J. Yoder
Evaluation Of Parameters Significantly Influencing The Performance Of Continuously Reinforced Concrete Pavements : Technical Paper, Asif Faiz, Eldon J. Yoder
JTRP Technical Reports
No abstract provided.
Analysis Of Motor Vehicle Accidents At Commercial Driveway Locations, David Albert Uckotter
Analysis Of Motor Vehicle Accidents At Commercial Driveway Locations, David Albert Uckotter
JTRP Technical Reports
No abstract provided.
Design Of Low Volume Roads, Eldon J. Yoder, Ahmed Atef Gadallah
Design Of Low Volume Roads, Eldon J. Yoder, Ahmed Atef Gadallah
JTRP Technical Reports
No abstract provided.
The Influence Of Retarding Admixtures On The Drying Shrinkage Of Concrete : Interim Report, William Lee Dolch, Charles F. Scholer
The Influence Of Retarding Admixtures On The Drying Shrinkage Of Concrete : Interim Report, William Lee Dolch, Charles F. Scholer
JTRP Technical Reports
No abstract provided.
Analysis Of Driver Reaction To Warning Devices At A High-Accident Rural Grade Crossing, Eugene Robert Russell
Analysis Of Driver Reaction To Warning Devices At A High-Accident Rural Grade Crossing, Eugene Robert Russell
JTRP Technical Reports
No abstract provided.
Film Formation On Anodically Polarized Lead, H. Vaidyanathan, Ram A. Narasagoudar, Thomas J. O'Keefe, William Joseph James, James W. Johnson
Film Formation On Anodically Polarized Lead, H. Vaidyanathan, Ram A. Narasagoudar, Thomas J. O'Keefe, William Joseph James, James W. Johnson
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Knudsen Effusion Study Of The Vaporization Of Cdo(S), R. Tom Coyle, Gordon Lewis
Knudsen Effusion Study Of The Vaporization Of Cdo(S), R. Tom Coyle, Gordon Lewis
Materials Science and Engineering Faculty Research & Creative Works
Knudsen effusion studies were conducted on CdO(s) in fused‐SiO2 Knudsen cells from 889 to 1110 K. The orifice size was varied; the largest cell orifice yielded a calculated pressure significantly lower than could be accounted for by experimental error. Average‐slope‐ and average‐free‐energy‐function‐based values of ΔHc298 were 86.9 ± 1.1 and 88.8 ± 0.5 kcal/mol, respectively. The data from the present work were combined with those of previous investigators using a method discussed by McCreary and Thorn; a ΔHc298 of 88.2 ± 0.2 kcal/mol was obtained. Using this combined value for ΔHc298 and ΔSc298= 51.40 ± 0.1 eu (obtained from the …
Thermal Decomposition Of Boron Triiodide On Molybdenum Field Emitter Surfaces, Richard E. Moore, P. Darrell Ownby
Thermal Decomposition Of Boron Triiodide On Molybdenum Field Emitter Surfaces, Richard E. Moore, P. Darrell Ownby
Materials Science and Engineering Faculty Research & Creative Works
Boron has been adsorbed onto molybdenum field emitter surfaces by the thermal decomposition of boron triiodide at corrected partial pressures of 1.4 x 10-9 Torr to 4.5 x 10-9 Torr. Based on field emission work function data and an analytical work function versus adsorbate-coverage relationship, a quantitative measure of the monolayer coverage of boron on molybdenum has been determined; this value is 6.3 x 1014 atoms/cm2/monolayer. A parameter, β, is defined which is a measure of the effective yield of adsorbed boron on molyb-denum from BI3. β is formulated in terms of the free energy of dissociation of the BI3 …
Electronic Contribution To The Entropy Of Solution, Manfred Wuttig
Electronic Contribution To The Entropy Of Solution, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Magnetostrictive Aftereffect In A Dilute 50fe-50ni-C Alloy, Raj Master, Manfred Wuttig
Magnetostrictive Aftereffect In A Dilute 50fe-50ni-C Alloy, Raj Master, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
A Mass Spectrometric Study Of Positive Ions Produced In An Experimental Diode, L. A. Addington, Gordon Lewis
A Mass Spectrometric Study Of Positive Ions Produced In An Experimental Diode, L. A. Addington, Gordon Lewis
Materials Science and Engineering Faculty Research & Creative Works
A simple diode ion source has been developed for direct observation in a mass spectrometer of the positive ions created in an operating diode. The ionic species accelerated toward the cathode were identified. The shape of the peak displayed in the spectrum is related to the region of the diode in which the ions were formed. Variation of experimental parameters, including the composition of the background gases, indicated that the characteristic shapes of the peaks can be related to space charge in the diode. This is complicated by the tendency of some of the species to fragment and further work …
Influence Of Oxygen Activity On The Sintering Of Mgcr2o4, Harlan U. Anderson
Influence Of Oxygen Activity On The Sintering Of Mgcr2o4, Harlan U. Anderson
Materials Science and Engineering Faculty Research & Creative Works
The sintering behavior of MgCr2O4 powder compacts was investigated as a function of temperature, time, and oxygen activity. The results show that MgCr2O4 cannot be densified to >70% of theoretical density at temperatures up to 1700°C if the oxygen activity exceeds 10−6 atm. The oxygen activity must be decreased to <10−10 atm before densities exceeding 90% of theoretical can be achieved. Weight loss and X‐ray data indicated that maximum density occurred at an oxygen activity just above that where MgCr2O4 becomes unstable. Copyright © 1974, Wiley Blackwell. All rights reserved
X-Ray Powder Data And Unit Cell Parameters Of Mgcl2.6h2o, Charles A. Sorrell, Roy R. Ramey
X-Ray Powder Data And Unit Cell Parameters Of Mgcl2.6h2o, Charles A. Sorrell, Roy R. Ramey
Materials Science and Engineering Faculty Research & Creative Works
Detailed X-ray powder data for MgCl2·6H2O were obtained by diffractometry by use of CuKα radiation at 22°C. The data were indexed on a bimolecular monoclinic unit cell, space group C2/m, with a = 9.858 ± 0.001 Å; b = 7.107 ± 0.001 Å; c = 6.069 ± 0.001 Å; ß = 93° 47′ ± 10′. Calculated density was 1.591 g/cm3, compared with a measured density of 1.593 ± 0.003 g/cm3. © 1974, American Chemical Society. All rights reserved.
Field Emission Of Boron On Tungsten, P. D. Ownby, Thomas A. Flaim
Field Emission Of Boron On Tungsten, P. D. Ownby, Thomas A. Flaim
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Magnetic Properties Of Cadmium Manganese Ferrite, B. W. Jong, P. D. Ownby
Magnetic Properties Of Cadmium Manganese Ferrite, B. W. Jong, P. D. Ownby
Materials Science and Engineering Faculty Research & Creative Works
The room-temperature saturation magnetization of CdxMn1-xFe2O4 decreased with increasing cadmium concentration. When 0 < x < 0.5, the decrease in saturation magnetization was due to the increase in the amount of non-mgnetic distorted cubic Cd(Mn, Fe) 2O4.
Recreational Impact Of Multi-Purpose Reservoirs: Final Summary Report : Technical Paper, William Louise Grecco
Recreational Impact Of Multi-Purpose Reservoirs: Final Summary Report : Technical Paper, William Louise Grecco
JTRP Technical Reports
No abstract provided.
A Questionnaire-Aided Assessment Of The State Of The Art For Compacted Shale Embankments : Technical Paper, David Robert Chapman, Leonard E. Wood
A Questionnaire-Aided Assessment Of The State Of The Art For Compacted Shale Embankments : Technical Paper, David Robert Chapman, Leonard E. Wood
JTRP Technical Reports
No abstract provided.
0103: William Ziebold Papers, 1915-1932, Marshall University Special Collections
0103: William Ziebold Papers, 1915-1932, Marshall University Special Collections
Guides to Manuscript Collections
Engineer from Charleston, West Virginia. Papers include examinations from the Ohio State University, a field book, and correspondence regarding a gas field in Canada.
Hall Effect Magnetometer, John A. Woollam, Harry A. Beale, Ian L. Spain
Hall Effect Magnetometer, John A. Woollam, Harry A. Beale, Ian L. Spain
Department of Electrical and Computer Engineering: Faculty Publications
A magnetometer utilizing a single crystal of Bi2Se3 having a rhombohedral crystal structure is described along with a method for making such a device. The Bi2Se3 has a positive or negative Hall coefficient and a carrier concentration of about 1018to1020 per cubic centimeter.
Vibration Characteristics Of Free Thin Cylindrical Shells, Floyd M. Cunningham, D. E. Leanhardt
Vibration Characteristics Of Free Thin Cylindrical Shells, Floyd M. Cunningham, D. E. Leanhardt
Mechanical and Aerospace Engineering Faculty Research & Creative Works
This paper considers the flexural vibrations of free thin circular cylinders. A frequency equation is derived using free-free characteristic beam functions to represent the variation of mid-surface shell displacement components, u, v and w, with respect to the axial direction. Timoshenko strain-displacement relations for thin cylinders are used to determine elastic vibratory strain energy. Energy methods are applied to obtain the frequency equation and associated amplitude ratios for each of its roots. This energy solution is checked experimentally using a vibration exciter and numerically using the SABOR IV finite element program. With minor modification, the frequency equation conforms to the …
Air Breakdown In A Radial-Mode Focusing Element, Lee W. Casperson, Mohammad Shabbir Shekhani
Air Breakdown In A Radial-Mode Focusing Element, Lee W. Casperson, Mohammad Shabbir Shekhani
Electrical and Computer Engineering Faculty Publications and Presentations
A new radial focusing device is described that condenses an incident laser beam to an extremely intense and uniformly illuminated focal spot. The focal region is useful for many applications. When used with a 10.6-µm CO₂ TEA laser source, a disk-shaped air-breakdown spark results, and the properties of this spark have been investigated.
Recommended Procedures For Conducting Pull-Over, Pull-Out And Single-Shear Tests Of Mechanical Connections, John Fraczek, George Winter, Teoman Peköz
Recommended Procedures For Conducting Pull-Over, Pull-Out And Single-Shear Tests Of Mechanical Connections, John Fraczek, George Winter, Teoman Peköz
CCFSS Library (1939 - present)
1. SCOPE 1.1 These methods cover procedures and definitions for the mechanical testing of joints formed by connecting a cold-formed steel member to a cold-formed or hot-rolled steel member with one or more mechanical fasteners. The purpose of these procedures is the determination of the load capacities of the joints so formed. 1.2 The term "mechanical fastener" or "fastener" shall be defined as any mechanical device used in the connection of two or more members, inclusive of such devices as bolts, tapping screws and rivets but exclusive of welds and adhesives. 1.3 The following mechanical tests are described: Sections Pull-Over …
Recommended Procedures For Conducting Pull-Over, Pull-Out And Single-Shear Tests Of Mechanical Connections, John Fraczek, George Winter, Teoman Peköz
Recommended Procedures For Conducting Pull-Over, Pull-Out And Single-Shear Tests Of Mechanical Connections, John Fraczek, George Winter, Teoman Peköz
CCFSS Library (1939 - present)
SCOPE 1.1 These methods cover procedures and definitions for the mechanical testing of joints formed by connecting a cold-formed steel member to a cold-formed or hot-rolled steel member with one or more mechanical fasteners. The purpose of these procedures is the determination of the load capacities of the joints so formed. 1.2 The term "mechanical fastener" or "fastener" shall be defined as any mechanical device used in the connection of two or more members, inclusive of such devices as bolts, tapping screws and rivets but exclusive of welds and adhesives. 1.3 The following mechanical tests are described: Pull-Over Sections 4-11, …
The Creep Response Of Cohesive Soils: A Method Of Design Using Rheological Strength Parameters, David L. Allen
The Creep Response Of Cohesive Soils: A Method Of Design Using Rheological Strength Parameters, David L. Allen
Kentucky Transportation Center Research Report
The creep response of four remolded soils and undisturbed soils from two landslide sites is presented. A method for obtaining the yield stress of soil from creep test data is presented and discussed. "Viscosity diagrams", showing the location of the yield stress is approximately 50 percent of peak stress, were obtained from conventional triaxial tests. There is more scatter in data from undisturbed soils than in data from remolded soils. Mohr's failure envelopes, constructed from yield stress data, give internal friction angles having values from approximately five to ten degrees. Strength data, calculated indirectly from peak relaxation modulus, are also …
Auto-Utility Trailer Combinations On Rural Highways In Kentucky, Bruce S. Siria, Robert C. Deen
Auto-Utility Trailer Combinations On Rural Highways In Kentucky, Bruce S. Siria, Robert C. Deen
Kentucky Transportation Center Research Report
An analysis of accident records indicated that auto-utility trailer (A-UT) combinations are involved in a disproportionately high number of traffic mishaps. Locations which have a history of accidents involving A-UT vehicles indicated that differential crosswinds and unanticipated driving maneuvers contribute to the driver's loss of control. A-UT combinations contributed to the fatigue loss in pavement life approximately 50 percent as much as single-unit, two-axle, six-tire trucks (per vehicle). In general, this vehicle type constituted approximately three percent of the total traffic stream. Analysis of speed distributions indicated an equivalency factor for A-UT combinations equal to that for trucks for similar …
Traffic Control For Maintenance On High-Speed Highways, William M. Seymour, Robert C. Deen, James H. Havens
Traffic Control For Maintenance On High-Speed Highways, William M. Seymour, Robert C. Deen, James H. Havens
Kentucky Transportation Center Research Report
Observations were first made at lane closures on interstate highways where yellow warning signs were erected routinely in conjunction with contract work. Later data provided direct comparison between new yellow and new orange signs. One sign scheme was used throughout the study. Driver obedience improved when new signs of either color were used; this finding implies that signs should always be maintained in good condition. Orange signs were slightly more effective than yellow signs in reducing traffic conflicts and merges near the traffic cones. Results of the study tend to support the adoption of orange as the standard color for …
Local And Overall Buckling Of Cold-Formed Compression Members, John T. Dewolf, George Winter, Teoman Peköz
Local And Overall Buckling Of Cold-Formed Compression Members, John T. Dewolf, George Winter, Teoman Peköz
CCFSS Library (1939 - present)
The objective of this investigation has been to develop information on the interaction between local plate buckling and overall column buckling in cold-formed compression members with a view toward possible improvement of those provisions in the American Iron and Steel Institute Specification for the Design or Cold-Formed Steel Structural Members concerned with column design. Two types of compression members were tested: two channels connected flange-to-flange to form a box section, and two channels connected back-to-back to form an I-section. For both of these shapes, the stress at which local buckling occurs and the postbuckling strength were varied by varying the …
Evaluation Of The Traffic Noise Prediction Procedure, Kenneth R. Agent, Charles V. Zegeer
Evaluation Of The Traffic Noise Prediction Procedure, Kenneth R. Agent, Charles V. Zegeer
Kentucky Transportation Center Research Report
Approximately 270 noise-level recordings were obtained at 39 highway sites and compared with the noise-level predictions obtained by the procedure outlined in NCHRP Report 117. The measured noise levels were computed in terms of the A-weighted L10 value (level exceeded 10 percent of time) and then compared to the predicted noise levels. A significant discrepancy was found between predicted and measured noise levels; generally, the predicted values exceeded the measured values. Average error per location was 4.8 dBA; the maximum error was 13 dBA. A nomograph was devised to correct the predicted value; this nomograph involves observer-to-roadway distances, truck …
Traffic Accident Reporting In Kentucky, Donald R. Herd
Traffic Accident Reporting In Kentucky, Donald R. Herd
Kentucky Transportation Center Research Report
This study reviews the organizational structure and processing procedures used in accident surveillance. Consideration was given to the techniques that various state governmental agencies use in their analysis of accident reports and statistics. It was concluded that Kentucky should enact uniform accident reporting legislation. A standard form should be prescribed for use by law enforcement agencies in complying with the reporting requirement. The creation of an Accident Records Unit to receive, process, and statistically analyze the reports is recommended.