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Articles 42811 - 42840 of 50088
Full-Text Articles in Entire DC Network
Application Of Rapid Asphalt Content Test To Slag Mixes, Douglas Windslow
Application Of Rapid Asphalt Content Test To Slag Mixes, Douglas Windslow
JTRP Technical Reports
The "nuclear" asphalt content gage was used with bituminous mixes containing slag aggregates to assess its applicability as a rapid analysis tool for these types of mixes. It was found to work as well, or better, than the standard extraction technique. It was also found to have additional advantages over the extraction technique since it is about an order to magnitude faster, requires no solvent and involves no decisions on the part of the user.
1991 Indiana Forest Products Price Report And Trend Analysis, William L. Hoover, Ralph W. Gann, Robert W. Mayer
1991 Indiana Forest Products Price Report And Trend Analysis, William L. Hoover, Ralph W. Gann, Robert W. Mayer
Timber Reports Archive
No abstract provided.
The Uniform Soybean Tests: Northern States 1991, J. R. Wilcox
The Uniform Soybean Tests: Northern States 1991, J. R. Wilcox
Uniform Soybean Tests Northern Region
No abstract provided.
1991 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.
Endothelial Superoxide Production In The Isolated Rat Heart During Early Reperfusion After Ischemia -- A Histochemical Study, Charles F. Babbs, Meloney D. Cregor, John J. Turek, Stephen F. Badylak
Endothelial Superoxide Production In The Isolated Rat Heart During Early Reperfusion After Ischemia -- A Histochemical Study, Charles F. Babbs, Meloney D. Cregor, John J. Turek, Stephen F. Badylak
Weldon School of Biomedical Engineering Faculty Publications
This paper describes a histochemical study of superoxide generation in buffer-perfused, isolated rat hearts during the first 2 minutes of reperfusion after 60 minutes of warm ischemia. Superoxide radical production was demonstrated by a modification of Karnovsky's manganese/diaminobenzidine technique, in which superoxide oxidizes Mn++ to Mn+++ ions, which in turn oxidize diaminobenzidine to form amber, osmiophilic polymers, observable by light or electron microscopy. Isolated hearts were rendered ischemic, reperfused with oxygen equilibrated buffer containing Mn++ and diaminobenzidine, fixed by perfusion with Trump's solution, and processed for light and electron microscopy. The method consistently demonstrated evidence of superoxide generation near the …
Methylene Blue As An Inhibitor Of Superoxide Generation By Xanthene Oxidase: A Potential New Drug For The Attenuation Of Ischemia/Reperfusion Injury, Steven C. Salaris, Charles F. Babbs, William D. Voorhees
Methylene Blue As An Inhibitor Of Superoxide Generation By Xanthene Oxidase: A Potential New Drug For The Attenuation Of Ischemia/Reperfusion Injury, Steven C. Salaris, Charles F. Babbs, William D. Voorhees
Weldon School of Biomedical Engineering Faculty Publications
Tissue oxidases, especially xanthine oxidase, have been proposed as primary sources of toxic oxygen radicals in many experimental models of disease states. Among these, ischemia-reperfusion injury may be of the greatest clinical interest. In this paper we propose the use of methylene blue as a means of suppressing the production of superoxide radicals, O2, by acting as an alternative electron acceptor for xanthine oxidase. Previous work has indicated that methylene blue accepts electrons from xanthine oxidase at the iron-sulfur center. Initial experiments in our laboratory demonstrated that (1) pairs of electrons from each enzymatic oxidation are transferred to methylene blue, …
Effective Estimation And Computer Control Of Minimum Tumour Temperature During Conductive Interstitial Hyperthermia, J A. Deford, Charles F. Babbs, U H. Patel, M W. Bleyer, J A. Marchosky, C J. Moran
Effective Estimation And Computer Control Of Minimum Tumour Temperature During Conductive Interstitial Hyperthermia, J A. Deford, Charles F. Babbs, U H. Patel, M W. Bleyer, J A. Marchosky, C J. Moran
Weldon School of Biomedical Engineering Faculty Publications
The goal of heat therapy in the treatment of malignant disease is to raise the temperature of all neoplastic tissue to a cytotoxic temperature for a predetermined period of time. This seemingly simple task has proved difficult in-vivo, in part because of nonuniform power absorption and in part because of nonhomogeneous and time varying tumour blood flow. We have addressed this difficulty first by utilizing the conceptually simple technique of conductive interstitial hyperthermia, in which the tumour is warmed by multiple, electrically heated catheters, and second by implementing on-line conu·ol of minimum tumour temperatures near each catheter, estimated on the …
Design And Evaluation Of Closed-Loop Feedback Control Of Minimum Temperatures In Human Intracranial Tumors Treated With Interstitial Hyperthermia, J A. Deford, Charles F. Babbs, U H. Patel, N E. Fearnot, J A. Marchosky, C J. Moran
Design And Evaluation Of Closed-Loop Feedback Control Of Minimum Temperatures In Human Intracranial Tumors Treated With Interstitial Hyperthermia, J A. Deford, Charles F. Babbs, U H. Patel, N E. Fearnot, J A. Marchosky, C J. Moran
Weldon School of Biomedical Engineering Faculty Publications
The dynamic nature of blood flow during hyperthermia therapy has made the control of minimum tumor temperature a difficult task. This paper presents initial studies of a novel approach to closed-loop control of local minimum tissue temperatures utilizing a newly developed estimation algorithm for use with conductive interstitial heating systems. The local minimum tumor temperature is explicitly estimated from the power required to maintain each member of an array of electrically heated catheters at a known temperature, in conjunction with a new bioheat equation-based algorithm to predict the ‘droop’ or fractional decline in tissue temperature between heated catheters. A closed …
On Optimal Adaptive Classifier Design Criterion- How Many Hidden Units Are Necessary For An Optimal Neural Network Classifier?, Wei Tsih Lee, Manoel Fernando Tenorio
On Optimal Adaptive Classifier Design Criterion- How Many Hidden Units Are Necessary For An Optimal Neural Network Classifier?, Wei Tsih Lee, Manoel Fernando Tenorio
Department of Electrical and Computer Engineering Technical Reports
A central problem in classifier design is the estimation of classification error. The difficulty in classifier design arises in situations where the sample distribution is unknown and the number of training samples available is limited. In this paper, we present a new approach for solving this problem. In our model, there are two types of classification error: approximation and generalization error. The former is due to the imperfect knowledge of the underlying sample distribution, while the latter is mainly the result of inaccuracies in parameter estimation, which is a consequence of the small number of training samples. We therefore propose …
Experimental Determination Of The Effects Of Degenerate Fermi Statistics On Heavily P‐Doped Gaas, E. S. Harmon, Michael R. Melloch, Mark S. Lundstrom, Michael L. Lovejoy
Experimental Determination Of The Effects Of Degenerate Fermi Statistics On Heavily P‐Doped Gaas, E. S. Harmon, Michael R. Melloch, Mark S. Lundstrom, Michael L. Lovejoy
Department of Electrical and Computer Engineering Faculty Publications
The effects of degenerate Fermi statistics on electron injection currents for p+‐GaAs grown by molecular beam epitaxy are presented. To achieve Be dopant concentrations of greater than 8×1019 cm−3, the substrate temperature during growth was reduced to approximately 450 °C from the usual 600 °C. In this heavily doped material, we measure unexpectedly large electron injectioncurrents which are interpreted in terms of an effective narrowing of the band gap. At extremely heavy doping densities, the Fermi level pushes into the valence band and degenerate Fermi statistics must be taken into account. For doping concentrations greater than …
Zero-Field Time-Of-Flight Measurements Of Electron Diffusion In P+-Gaas, Michael L. Lovejoy, B. M. Keyes, M. E. Klausmeier-Brown, Michael R. Melloch, R. K. Ahrenkiel, Mark S. Lundstrom
Zero-Field Time-Of-Flight Measurements Of Electron Diffusion In P+-Gaas, Michael L. Lovejoy, B. M. Keyes, M. E. Klausmeier-Brown, Michael R. Melloch, R. K. Ahrenkiel, Mark S. Lundstrom
Department of Electrical and Computer Engineering Faculty Publications
Minority electron diffusivities in p+-GaAs-doped NA =~1.4×1018 and ~1019 cm-3 have been measured in zero-field conditions with an extension of the zero-field time-of-flight technique. Extension of the technique to make it applicable to heavily doped p+-GaAs is described and zero-field data are discussed. Unexpectedly, majority carrier drag effects are not evident in a comparison of this data with recently reported high-field data. Low zero-field mobility of electrons in p+-GaAs has important implications for high-speed devices such as heterojunction bipolar transistors.
Transistor-Based Studies Of Heavy Dop-Ing Effects In N-Gaas, M. P. Patkar, Mark S. Lundstrom, Michael R. Melloch
Transistor-Based Studies Of Heavy Dop-Ing Effects In N-Gaas, M. P. Patkar, Mark S. Lundstrom, Michael R. Melloch
Department of Electrical and Computer Engineering Faculty Publications
The n2ieDp product (where n2ie is the np product and Dp is the minority hole mobility) in heavily doped n‐GaAs has been measured by electrical characterization of p‐n‐p GaAs homojunction transistors with base dopings ranging from approximately 1×1017 to 9×1018 cm−3. The measured n2ieDp product decreases as the doping density increases. These results suggest that nie is roughly constant with doping density, in sharp contrast to the large increase observed for p‐type GaAs. This work shows that when designing GaAs bipolar devices, …
Modeling, Estimation, And Pattern Analysis Of Random Texture On 3-D Surfaces, Yoonsik Choe, R. L. Kashyap
Modeling, Estimation, And Pattern Analysis Of Random Texture On 3-D Surfaces, Yoonsik Choe, R. L. Kashyap
Department of Electrical and Computer Engineering Technical Reports
To recover 3-D structure from a shaded and textural surface image involving textures, neither the Shape-from-shading nor the Shape-from-texture analysis is enough, because both radiance and texture information coexist within the scene surface. A new 3-D texture model is developed by considering the scene image as the superposition of a smooth shaded image and a random texture image. To describe the random part, the orthographical projection is adapted to take care of the non-isotropic distribution function of the intensity due to the slant and tilt of a 3-D textures surface, and the Fractional Differencing Periodic (FDP) model is chosen to …
Repair/Rehabilitation Of Deteriorated Drainage Pipe, Bob G. Mccullouch
Repair/Rehabilitation Of Deteriorated Drainage Pipe, Bob G. Mccullouch
JTRP Technical Reports
This report describes the current technologies, methods and materials used in drainage pipe rehab and replacement. It also identifies which of these technologies can be applied for the various pipe material types. Installed cost information was obtained from the states in the survey and from vendors for the various methods. In describing each method, equipment requirements and limitations are reported. From this report, one should be able to understand what method is appropriate for the various repair problems and pipe types.
User Guide For Pc-Stabl3d, Gennady Moshkovich
User Guide For Pc-Stabl3d, Gennady Moshkovich
JTRP Technical Reports
PC-STABL3D is the program for IBM PC compatible computers, developed to handle general stability analysis of three-dimensional slopes. Random generation routines are invoked to create trial failure surfaces, which are analyzed using the limiting equilibrium approach. The current version of PC-STABL3D is enhanced by a graphical pre/postprocessor, which facilitates creation and edition 0 data files, examination of problem geometry, and analyzing of the obtained failure surfaces. After the failure surfaces are generated and their factors of safety are computed, the program performs statistical analysis of received factors of safety, and calculates minimum statistical factor of safety. The information about minimum …
Use Of Waste Materials In Highway Construction, Imtiaz Ahmed
Use Of Waste Materials In Highway Construction, Imtiaz Ahmed
JTRP Technical Reports
This study synthesizes the information on the use of waste materials in highway construction. The information was obtained from a review of published literature supplemented by: recent unpublished reports, presentations of research updates by professionals at different forums, anti personal meetings with the experts. In addition, a questionnaire regarding the use of waste materials was prepared and distributed to each of the state highway agencies. A majority of states responded to the questionnaire, giving a summary of current practices in the use of waste materials in highway construction and their experiences on the technical, environmental, and economic aspects of the …
Traffic Speed Report No. 124: Traffic Report, David L. Cochran, Donald W. Genda
Traffic Speed Report No. 124: Traffic Report, David L. Cochran, Donald W. Genda
JTRP Technical Reports
No abstract provided.
Speed Trends On Indiana Rural Interstate Highways : Traffic Report, David L. Cochran
Speed Trends On Indiana Rural Interstate Highways : Traffic Report, David L. Cochran
JTRP Technical Reports
No abstract provided.
Family Systems Theory And The Form Of Conference Dialogue, Louise Z. Smith
Family Systems Theory And The Form Of Conference Dialogue, Louise Z. Smith
The Writing Center Journal
No abstract provided.
Solutions And Trade-Offs In Writing Center Administration, Muriel Harris
Solutions And Trade-Offs In Writing Center Administration, Muriel Harris
The Writing Center Journal
No abstract provided.
Minutes Of National Writing Centers Association Executive Board Meeting
Minutes Of National Writing Centers Association Executive Board Meeting
The Writing Center Journal
No abstract provided.
Review Of When Tutor Meets Student: Experiences In Collaborative Learning, Bradley T. Hughes
Review Of When Tutor Meets Student: Experiences In Collaborative Learning, Bradley T. Hughes
The Writing Center Journal
No abstract provided.
Bibliography Of Recent Writing Center Scholarship (April 1990 - March 1991), Martha Marinara
Bibliography Of Recent Writing Center Scholarship (April 1990 - March 1991), Martha Marinara
The Writing Center Journal
No abstract provided.
Collaboration, Control, And The Idea Of A Writing Center, Andrea Lunsford
Collaboration, Control, And The Idea Of A Writing Center, Andrea Lunsford
The Writing Center Journal
No abstract provided.
Learning More From The Students, Jean Kiedaisch, Sue Dinitz
Learning More From The Students, Jean Kiedaisch, Sue Dinitz
The Writing Center Journal
No abstract provided.
Bringing Tutorials To A Close: Counseling's Termination Process And The Writing Tutorial, Michael Steven Marx
Bringing Tutorials To A Close: Counseling's Termination Process And The Writing Tutorial, Michael Steven Marx
The Writing Center Journal
No abstract provided.
Interim Report: Embankment Widening And Grade Raising On Soft Foundation Soils, Example I - Indiana State Route 55 Over Turkey Creek In Lake County, Indiana, Scott J. Ludlow, Wai-Fah Chen, Philippe L. Bourdeau, C. W. Lovell
Interim Report: Embankment Widening And Grade Raising On Soft Foundation Soils, Example I - Indiana State Route 55 Over Turkey Creek In Lake County, Indiana, Scott J. Ludlow, Wai-Fah Chen, Philippe L. Bourdeau, C. W. Lovell
JTRP Technical Reports
No abstract provided.
The Impact Of Highway Services And Expenditures On Regional Economic Development, Paulus Cornelius Lombard, Kumares C. Sinha, Deborah J. Brown
The Impact Of Highway Services And Expenditures On Regional Economic Development, Paulus Cornelius Lombard, Kumares C. Sinha, Deborah J. Brown
JTRP Technical Reports
This report presents results from a study to determine the relationship between highway infraatructure and economic development in Indiana. Regression models and a computer model were developed to estimate the annual long-term impacts of highway construction on economic growth. Results from an analysis of economic impacts of the construction of 13 four-lane highway sections in Indiana, as well as an analysis of national data concerning industrial location determinants, are also presented.