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Articles 68581 - 68610 of 75068
Full-Text Articles in Engineering
Effect Of Excess Pbo On The Sintering Characteristics And Dielectric Properties Of Pb(Mg1/3nb2/3)O3–Pbtio3‐Based Ceramics, Jyoti P. Guha, Dyllan J. Hong, Harlan U. Anderson
Effect Of Excess Pbo On The Sintering Characteristics And Dielectric Properties Of Pb(Mg1/3nb2/3)O3–Pbtio3‐Based Ceramics, Jyoti P. Guha, Dyllan J. Hong, Harlan U. Anderson
Materials Science and Engineering Faculty Research & Creative Works
Additions of excess PbO to the perovskite Pb[(Mg1/3Nb2/3)0.92Ti0.08]O3 solid solution enhanced the formation of a liquid phase at 840°C, which served as a densification aid for the ceramics. The liquid phase allowed elimination of pores and promoted grain growth during sintering. With additions of 1 to 2 wt% excess PbO, densities in excess of 97% of theoretical were obtained at a sintering temperature of 950°C. The peak dielectric constants of the resulting ceramics were over 18 000 at 30°C and dissipation factors less than 1%. Additions of PbO in excess of …
Material Characterization Of Hot-Mix Recycled Bituminous Pavements : Executive Summary, Leonard E. Wood, Ahmed Samy Noureldin
Material Characterization Of Hot-Mix Recycled Bituminous Pavements : Executive Summary, Leonard E. Wood, Ahmed Samy Noureldin
JTRP Technical Reports
No abstract provided.
An Automatic Quantitative Image Analysis System For Construction Materials : Executive Summary, Dexiang Shi
An Automatic Quantitative Image Analysis System For Construction Materials : Executive Summary, Dexiang Shi
JTRP Technical Reports
No abstract provided.
Structural Behavior Of High Strength Concrete Prestressed I-Beams, Volume Ii: Executive Summary, M. Keith Kaufman, J. A. Ramirez
Structural Behavior Of High Strength Concrete Prestressed I-Beams, Volume Ii: Executive Summary, M. Keith Kaufman, J. A. Ramirez
JTRP Technical Reports
No abstract provided.
An Evaluation Of Effects Of Routine Maintenance On Highway Surface Conditions : Informational Report, Turki Ibrahim. Al-Suleiman, Kumares C. Sinha
An Evaluation Of Effects Of Routine Maintenance On Highway Surface Conditions : Informational Report, Turki Ibrahim. Al-Suleiman, Kumares C. Sinha
JTRP Technical Reports
No abstract provided.
Development Of A Prototype System For Snow Route Design And Management, J. R. Wright
Development Of A Prototype System For Snow Route Design And Management, J. R. Wright
JTRP Technical Reports
No abstract provided.
An Investigation Of The Micro-Surfaces Of Fiber Glass, Window Glass, Bottle Glass, And Quartz Crystal Through The Use Of Scanning Electron Microscopy, Raymond C. Friedrichsen
An Investigation Of The Micro-Surfaces Of Fiber Glass, Window Glass, Bottle Glass, And Quartz Crystal Through The Use Of Scanning Electron Microscopy, Raymond C. Friedrichsen
Graduate Research Papers
The problem of this study is to investigate the surfaces of quartz crystal, bottle glass, window glass, and fiber glass, to determine if there are any substantial differences in their structures when compared to a fiber optic material. The investigation will be done with the aid of the scanning electron microscope {SEM).
Technical Report El-88-18: Reliability Of The Federally Owned Water Main System, Donald V. Chase, Lindell Ormsbee, Thomas M. Walski
Technical Report El-88-18: Reliability Of The Federally Owned Water Main System, Donald V. Chase, Lindell Ormsbee, Thomas M. Walski
Civil and Environmental Engineering and Engineering Mechanics Faculty Publications
The reliability of the Federally Owned Water Main (FOWM) system was examined, and recommendations to improve system reliability are made. The existing FOWM system is very dependent upon three different pipe links.
The first and most important link is the Francis Scott Key Bridge river crossing. This link carries the entire FOWM supply, and if taken out of service, an alternate means of supply must be used. At present, the only alternate source of supply is through interconnections with the adjacent Arlington County, Virginia, system.
The second vital link is the 30-in. steel main which extends from the Key Bridge …
Prediction Of Erosion On Cut Or Fill Slopes, Jen-Chen Fan
Prediction Of Erosion On Cut Or Fill Slopes, Jen-Chen Fan
JTRP Technical Reports
No abstract provided.
The Development Of Optimal Strategies For Maintenance, Rehabilitation And Replacement Of Highway Bridges, Vol. 1: The Elements Of The Indiana Bridge Management System (Ibms), Kumares C. Sinha, Mitsuru Saito, Yi Jiang, Sudhir Murthy, Ah Beng Tee, Mark D. Bowman
The Development Of Optimal Strategies For Maintenance, Rehabilitation And Replacement Of Highway Bridges, Vol. 1: The Elements Of The Indiana Bridge Management System (Ibms), Kumares C. Sinha, Mitsuru Saito, Yi Jiang, Sudhir Murthy, Ah Beng Tee, Mark D. Bowman
JTRP Technical Reports
No abstract provided.
Strains In Si-Onsio2 Structures Formed By Oxygen Implantation: Raman Scattering Characterization, D.J. Olego, H. Baumgart, G.K. Celler
Strains In Si-Onsio2 Structures Formed By Oxygen Implantation: Raman Scattering Characterization, D.J. Olego, H. Baumgart, G.K. Celler
Electrical & Computer Engineering Faculty Publications
Low-temperature Raman scattering measurements were carried out to characterize Si-on-SiO2 structures formed by oxygen implantation and subsequent furnace or lamp annealing. The experiments were conducted with 413.1 nm laser light to probe only the thin Si layers at the top of the structures. The Raman spectra of the furnace-annealed samples are red shifted and broadened when compared with a virgin Si surface. The shifts and broadenings decrease with increasing annealing temperatures but they are still present in samples annealed above 1250°C for 3 h. No shifts or broadenings affect the Raman peaks of the layers, which were lamp annealed …
Raman Scattering Characterization Of The Microscopic Structure Of Semi-Insulating Polycrystalline Si Thin Films, D.J. Olego, H. Baumgart
Raman Scattering Characterization Of The Microscopic Structure Of Semi-Insulating Polycrystalline Si Thin Films, D.J. Olego, H. Baumgart
Electrical & Computer Engineering Faculty Publications
Raman scattering experiments were carried out to study the microscopic structure of semi-insulating polycrystalline Si (SIPOS) thin films prepared by low-pressure chemical vapor deposition. The samples contain 18, 25, and 30 at. % of oxygen and after growth they were annealed at 900 and 1000°C for 30 min. The Raman spectra show in the vibrational region of the optical frequencies of Si two bands, which arise from scattering in crystalline grains and disordered forms of Si. The behavior of these bands as a function of oxygen content and annealing temperatures was established in detail. The crystallinelike band peaks below the …
An Optically Controlled Closing And Opening Semiconductor Switch, K. H. Schoenbach, V. K. Lakdawala, R. Germer, S. T. Ko
An Optically Controlled Closing And Opening Semiconductor Switch, K. H. Schoenbach, V. K. Lakdawala, R. Germer, S. T. Ko
Electrical & Computer Engineering Faculty Publications
A concept for a bulk semiconductor switch is presented, where the conductivity is increased and reduced, respectively, through illumination with light of different wavelengths. The increase in conductivity is accomplished by electron ionization from deep centers and generation of bound holes. The reduction of conductivity is obtained by hole ionization from the excited centers and subsequent recombination of free electrons and holes. The transient behavior of electron and hole density in a high power semiconductor (GaAs:Cu) switch is computed by means of a rate equation model. Changes in conductivity by five orders of magnitude can be obtained.
Effects Of Asphalt Composition And Compaction On The Performance Of Asphalt Pavement Mixtures: Executive Summary, Leonard E. Wood, A. G. Altschaeffl
Effects Of Asphalt Composition And Compaction On The Performance Of Asphalt Pavement Mixtures: Executive Summary, Leonard E. Wood, A. G. Altschaeffl
JTRP Technical Reports
No abstract provided.
Priority Assessment Of Routine Maintenance Needs And Optimal Programming : Interim Report, Tien Fang Fwa, John Daniel Riverson, Kumares C. Sinha
Priority Assessment Of Routine Maintenance Needs And Optimal Programming : Interim Report, Tien Fang Fwa, John Daniel Riverson, Kumares C. Sinha
JTRP Technical Reports
No abstract provided.
Prediction Of Erosion On Cut Or Fill Slopes : Executive Summary, Jen-Chen Fan
Prediction Of Erosion On Cut Or Fill Slopes : Executive Summary, Jen-Chen Fan
JTRP Technical Reports
No abstract provided.
An Automatic Quantitative Image Analysis System For Construction Materials, Dexiang Shi
An Automatic Quantitative Image Analysis System For Construction Materials, Dexiang Shi
JTRP Technical Reports
No abstract provided.
Production And Engineering Properties Of Concrete Used In Precast Prestressed I-Beams For The State Of Indiana, Volume I: Executive Summary, M. Keith Kaufman, J. A. Ramirez
Production And Engineering Properties Of Concrete Used In Precast Prestressed I-Beams For The State Of Indiana, Volume I: Executive Summary, M. Keith Kaufman, J. A. Ramirez
JTRP Technical Reports
No abstract provided.
Evaluation Of The Coordination Of Weigh-In-Motion Truck: Fy86 Rtap Wim Project, John Daniel Riverson, Kumares C. Sinha
Evaluation Of The Coordination Of Weigh-In-Motion Truck: Fy86 Rtap Wim Project, John Daniel Riverson, Kumares C. Sinha
JTRP Technical Reports
No abstract provided.
Production And Engineering Properties Of Concrete Used In Precast Prestressed I-Beams For The State Of Indiana, Volume I, M. Keith Kaufman, J. A. Ramirez
Production And Engineering Properties Of Concrete Used In Precast Prestressed I-Beams For The State Of Indiana, Volume I, M. Keith Kaufman, J. A. Ramirez
JTRP Technical Reports
No abstract provided.
Development Of An Idoh Classification System For Geotextiles, Dean Andrew Karcz, R. D. Holtz
Development Of An Idoh Classification System For Geotextiles, Dean Andrew Karcz, R. D. Holtz
JTRP Technical Reports
No abstract provided.
Assessment Of Routine Maintenance Needs And Optimal Use Of Maintenance Funds, Kumares C. Sinha, Turki Ibrahim Al-Suleiman, Rajeev Prakash Tandon, Khaled Ksaibati, Tien Fang Fwa, Kieran John Feighan, John Daniel Riverson, Ferdnando Mario Montenegro
Assessment Of Routine Maintenance Needs And Optimal Use Of Maintenance Funds, Kumares C. Sinha, Turki Ibrahim Al-Suleiman, Rajeev Prakash Tandon, Khaled Ksaibati, Tien Fang Fwa, Kieran John Feighan, John Daniel Riverson, Ferdnando Mario Montenegro
JTRP Technical Reports
No abstract provided.
Fly Ash Concrete For Highway Use, Sidney Diamond, J. Olek
Fly Ash Concrete For Highway Use, Sidney Diamond, J. Olek
JTRP Technical Reports
No abstract provided.
Supporting Document For Stabl/Pc 4m : Informational Report, Jose E. Thomaz
Supporting Document For Stabl/Pc 4m : Informational Report, Jose E. Thomaz
JTRP Technical Reports
No abstract provided.
User Guide For Stabl/Pc 5m : Informational Report, Eftychios Achilleos
User Guide For Stabl/Pc 5m : Informational Report, Eftychios Achilleos
JTRP Technical Reports
No abstract provided.
Assessment Of Routine Maintenance Needs And Optimal Use Of Routine Maintenance Funds, Kumares C. Sinha, Turki Ibrahim Al-Suleiman, Khaled Ksaibati, Kieran John Feighan, Ferdnando Mario Montenegro, Rajeev Prakash Tandon, Tien Fang Fwa, John Daniel Riverson
Assessment Of Routine Maintenance Needs And Optimal Use Of Routine Maintenance Funds, Kumares C. Sinha, Turki Ibrahim Al-Suleiman, Khaled Ksaibati, Kieran John Feighan, Ferdnando Mario Montenegro, Rajeev Prakash Tandon, Tien Fang Fwa, John Daniel Riverson
JTRP Technical Reports
No abstract provided.
South East Missouri Lead Belt - A Review 1987, Johh L. Watson
South East Missouri Lead Belt - A Review 1987, Johh L. Watson
Materials Science and Engineering Faculty Research & Creative Works
The south-east Missouri Lead Belt is, and has been for many years, a major world producer of lead concentrate. This paper reviews the current mill operations in the area and presents detailed information on equipment, operating parameters and metallurgical performance. © 1988.
1988 Directory Of Indiana State, County, City And Town Officials Responsible For Road And Street Work, Herpicc
Indiana Local Technical Assistance Program (LTAP) Directory
Contact information for agency officials and employees responsible for Indiana’s local road infrastructure.
Administration And Management Of Local Streets And Roads 1988 Volume Ii, Herpicc
Administration And Management Of Local Streets And Roads 1988 Volume Ii, Herpicc
Indiana Local Technical Assistance Program (LTAP) Publications
This is Volume II of a two volume handbook that provides local public officials with a guide to technical, environmental, legal and procedural constraints pertaining to local street and road programs in the state of Indiana and provides a comprehensive and usable documented discussion of these subjects. It is based upon an Oregon county road manual published in the early 1980's. Municipal concerns and considerations have been included in addition to those of counties. Volume I is a discussion of ten major topics: local authority; intergovernmental relations; transportation planning; obtaining right-of-way; location, relocation, vacation and railroad abandonment; jurisdictional and functional …
Administration And Management Of Local Streets And Roads 1988 Volume I, Herpicc
Administration And Management Of Local Streets And Roads 1988 Volume I, Herpicc
Indiana Local Technical Assistance Program (LTAP) Publications
This is Volume I of a two volume handbook that provides local public officials with a guide to technical, environmental, legal and procedural constraints pertaining to local street and road programs in the state of Indiana and provides a comprehensive and usable documented discussion of these subjects. It is based upon an Oregon county road manual published in the early 1980's. Municipal concerns and considerations have been included in addition to those of counties. Volume I is a discussion of ten major topics: local authority; intergovernmental relations; transportation planning; obtaining right-of-way; location, relocation, vacation and railroad abandonment; jurisdictional and functional …