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Articles 10591 - 10620 of 12099
Full-Text Articles in Entire DC Network
Multiple Scattering And Attenuation Phenomena In Diffraction Imaging, Mani Azimi, A. C. Kak
Multiple Scattering And Attenuation Phenomena In Diffraction Imaging, Mani Azimi, A. C. Kak
Department of Electrical and Computer Engineering Technical Reports
The problem of cross sectional (tomographic) imaging bf objects with diffracting sources is addressed. Specifically the area of investigation is the effect of multiple scattering and attenuation phenomena in diffraction imaging. The validity of either the Born or the Rytov approximations is the basic assumption behind all the inverse scattering techniques in diffraction tomography. To test these techniques When these assumptions are not satisfied, we have developed a computational procedure for the calculation of the “ true” scattered fields from a multi-component object. Using this procedure, the performance of two available diffraction reconstruction techniques is examined in the presence of …
Imaging With Diffraction Tomography, Malcolm Slaney, A. C. Kak
Imaging With Diffraction Tomography, Malcolm Slaney, A. C. Kak
Department of Electrical and Computer Engineering Technical Reports
The problem of cross sectional (tomographic) imaging bf objects with diffracting sources is addressed. Specifically the area of investigation is the effect of multiple scattering and attenuation phenomena in diffraction imaging. This work reviews the theory and limits of first order diffraction tomography and studies iterative techniques that can be used to improve the quality of tomographic imaging with diffracting sources. Conventional (straight-ray) tomographic algorithms are not valid when used with acoustic or microwave energy. Thus more sophisticated algorithms are needed; First order diffraction tomography uses a linearized version of the wave equation and gives an especially simple reconstruction algorithm. …
Report On Solar Energy Conversion Through The Interaction Of Plasmons With Tunnel Junctions, R. J. Schwartz, S. Datta, P. E. Welsh
Report On Solar Energy Conversion Through The Interaction Of Plasmons With Tunnel Junctions, R. J. Schwartz, S. Datta, P. E. Welsh
Department of Electrical and Computer Engineering Technical Reports
This report covers the work performed under grant NAG 3-433, “Solar Energy Conversion Through the Interaction of Plasmons with Tunnel Junctions,” during the period from June 1,1983 to December 31, 1984. Personnel performing the work were Prof. R J. Schwartz, Prof. S. Datta and Graduate Research Assistant P. E. Welsh. Much of the detail of the work described in this report is covered in a Master’s Thesis submitted by P. E. Welsh to the School of Electrical Engineering, Purdue University, December 1984.
Tilde Trees In The Unix Environment, Douglas E. Comer, Ralph E. Droms
Tilde Trees In The Unix Environment, Douglas E. Comer, Ralph E. Droms
Department of Computer Science Technical Reports
No abstract provided.
Pcstabl4 User Manual : Information Report, James Richard Carpenter
Pcstabl4 User Manual : Information Report, James Richard Carpenter
JTRP Technical Reports
No abstract provided.
Selection And Use Of Fly Ash For Highway Concrete, Sidney Diamond
Selection And Use Of Fly Ash For Highway Concrete, Sidney Diamond
JTRP Technical Reports
No abstract provided.
Energy Conservation And Cost Savings Related To Highway Maintenance: Executive Summary, Mitsuru Saito, Essam Abdel-Aziz Sharaf, Kumares C. Sinha
Energy Conservation And Cost Savings Related To Highway Maintenance: Executive Summary, Mitsuru Saito, Essam Abdel-Aziz Sharaf, Kumares C. Sinha
JTRP Technical Reports
No abstract provided.
Energy Conservation And Cost Savings Related To Highway Maintenance, Mitsuru Saito, Essam Abdel-Aziz Sharaf, Kumares C. Sinha
Energy Conservation And Cost Savings Related To Highway Maintenance, Mitsuru Saito, Essam Abdel-Aziz Sharaf, Kumares C. Sinha
JTRP Technical Reports
No abstract provided.
Absorption And Absorptivity Of Aggregates As Indicators Of Frost Durability : Informational Report, Jack Duvall Hunter
Absorption And Absorptivity Of Aggregates As Indicators Of Frost Durability : Informational Report, Jack Duvall Hunter
JTRP Technical Reports
No abstract provided.
Development Of An Energy Audit Manual For Indiana Department Of Highway Buildings, Brett Michael Partridge
Development Of An Energy Audit Manual For Indiana Department Of Highway Buildings, Brett Michael Partridge
JTRP Technical Reports
No abstract provided.
The Identification Of Areas Of Routine Maintenance Productivity Improvement, Stephen M. O'Brien, Kumares C. Sinha
The Identification Of Areas Of Routine Maintenance Productivity Improvement, Stephen M. O'Brien, Kumares C. Sinha
JTRP Technical Reports
No abstract provided.
Rigid Pavement Pumping: (1) Subbase Erosion And (2) Economic Modeling : Informational Report, Wijk Adriaan Van
Rigid Pavement Pumping: (1) Subbase Erosion And (2) Economic Modeling : Informational Report, Wijk Adriaan Van
JTRP Technical Reports
No abstract provided.
Behavior Of Mucks And Amorphous Peats As Embankment Foundations : Interim Report, Paul Gerard Joseph
Behavior Of Mucks And Amorphous Peats As Embankment Foundations : Interim Report, Paul Gerard Joseph
JTRP Technical Reports
No abstract provided.
Writing A Scientific Paper Prior To The Research, Charles F. Babbs, Martha M. Tacker
Writing A Scientific Paper Prior To The Research, Charles F. Babbs, Martha M. Tacker
Weldon School of Biomedical Engineering Faculty Publications
The traditional approach to preparing a research report for publication is to begin writing after the study has been completed. We propose another approach- to write a "zeroth" draft before the study is begun. This approach helps to focus the investigator's attention during the planning stage on critical aspects of the study. The discipline of writing down the rationale, the methods, and the variety of possible outcomes and their significance helps to clarify the logic on which the study is based. If these are acceptable to all authors and colleagues in the zeroth draft, it is likely that the research …
Joseph S. Redding's Contributions To Cardiac Resuscitation, Sandra H. Ralston, Charles F. Babbs
Joseph S. Redding's Contributions To Cardiac Resuscitation, Sandra H. Ralston, Charles F. Babbs
Weldon School of Biomedical Engineering Faculty Publications
The experimental studies conducted by the late Joseph S. Redding over the past three decades with his students and colleagues form the scientific basis for many aspects of present cardiopulmonary resuscitation (CPR). Redding's research was characterized by its elegance, simplicity, common-sense reasoning, and clinical relevance. Much of his work conducted in the 1960's anticipated with uncanny accuracy some of the most actively discussed issues in resuscitation today (Table 1). Most interesting are Redding's classic studies related to diastolic arterial pressure and myocardial perfusion during CPR, abdominal binding, acid-base status, and use of methoxamine versus other adrenergic drugs for cardiac resuscitation. …
Hierarchical Classification Of Multitemporal/Multispectral Scanner Data, D. F. Lozano-Garcia, Roger M. Hoffer
Hierarchical Classification Of Multitemporal/Multispectral Scanner Data, D. F. Lozano-Garcia, Roger M. Hoffer
LARS Technical Reports
Most techniques for computer classification of multispectral scanner data involve a "single-stage" approach in which every pixel in the data is classified in a single step, using a single set of training statistics and a single set of wave length bands. Hierarchical classifiers, on the other hand, involve a sequence of classification steps, each of which can involve a different wavelength band or combination of wavelength bands. In addition, at each step in the classification process only one spectral class or a specific group of spectral classes are separated from all other classes in the data. Since a relatively small …
Parallel Algorithms For Bridge- And Bi-Connectivity On Minimum Area Meshes, Susanne E. Hambrusch
Parallel Algorithms For Bridge- And Bi-Connectivity On Minimum Area Meshes, Susanne E. Hambrusch
Department of Computer Science Technical Reports
No abstract provided.
Adapting A Conventional Writing Lab To The Berthoff Approach, Clinton Luckett
Adapting A Conventional Writing Lab To The Berthoff Approach, Clinton Luckett
The Writing Center Journal
No abstract provided.
Writing Centers And Writing-Across-The-Curriculum: An Important Connection, Carol Peterson Haviland
Writing Centers And Writing-Across-The-Curriculum: An Important Connection, Carol Peterson Haviland
The Writing Center Journal
No abstract provided.
Training Peer Tutors Using Video, Susan Glassman
Training Peer Tutors Using Video, Susan Glassman
The Writing Center Journal
No abstract provided.
Theory And Reality: The Ideal Writing Center(S), Muriel Harris
Theory And Reality: The Ideal Writing Center(S), Muriel Harris
The Writing Center Journal
No abstract provided.
From Fellow Writer To Reading Coach: The Peer Tutor's Role In Collaboration, James Sollisch
From Fellow Writer To Reading Coach: The Peer Tutor's Role In Collaboration, James Sollisch
The Writing Center Journal
No abstract provided.
Checklist Of Recent Writing Center Scholarship: April 1983-March 1985, Jay Jacoby
Checklist Of Recent Writing Center Scholarship: April 1983-March 1985, Jay Jacoby
The Writing Center Journal
No abstract provided.
Blas, Linear, Algebra Modules And Supercomputers Parvec Workshop #4, John R. Rice
Blas, Linear, Algebra Modules And Supercomputers Parvec Workshop #4, John R. Rice
Department of Computer Science Technical Reports
No abstract provided.
Dynamic Studies Of Multiterminal Dc-Ac Systems, Alireza Hamzei-Nejad, C. M. Ong
Dynamic Studies Of Multiterminal Dc-Ac Systems, Alireza Hamzei-Nejad, C. M. Ong
Department of Electrical and Computer Engineering Technical Reports
In transient stability programs that use a static dc network representation, the procedure to determine the control mode of operation and the solution of the multiterminal dc system is complex and time consuming. A systematic approach that is based on a linear programming formulation is presented in this thesis. The constraints incorporated in the LB formulation automatically ensure that the solution obtained is feasible. It is shown that the method is not only computationally efficient but also versatile in its ability to handle many of the common control characteristics, such as those of the constant angle (extinction and ignition), constant …
Final Report: Theory Of Advanced High Efficiency Concentrator Cells, Mark S. Lunstrom, R. J. Schwartz, C. M. Maziar, P. D. Demoulin
Final Report: Theory Of Advanced High Efficiency Concentrator Cells, Mark S. Lunstrom, R. J. Schwartz, C. M. Maziar, P. D. Demoulin
Department of Electrical and Computer Engineering Technical Reports
The goal of this project was to begin -developing accurate, and ultimately predictive, device models for III-V concentrator cells. The project consisted of extending a one-dimensional numerical device model previously developed at Purdue to III-V solar cells. We also began verifying the accuracy of the code by comparing computed and measured solar cell characteristics. Gallium arsenide was selected because it is the most mature III-V technology and because GaAs solar cells have demonstrated high conversion efficiency [l,2,3]. The present device model should be useful in optimizing GaAs solar cells and forms a foundation that can be extended to other III-V …
Microprocessor- Oriented Algorithms For Data Communications, Veljko Milutinovic
Microprocessor- Oriented Algorithms For Data Communications, Veljko Milutinovic
Department of Electrical and Computer Engineering Technical Reports
Data modem design has attracted a lot of scientific and commercial interest for more than three decades now. The field is important from a scientific point of view, since reliable data communications require very sophisticated solutions to many associated problems. From a commercial point of view its importance arises from the ever- rising needs for Computer networking and distributed processing in general. Modem algorithms are real-time in nature, so adequate technological support is important for modem design development. Advances in VLSI are opening new possibilities in this area and current trends toward integration of computing and communications are placing new …
Parallel Algorithms For Isolated And Connected Word Recognition, Mark Alan Yoder, Leah H. Jamieson
Parallel Algorithms For Isolated And Connected Word Recognition, Mark Alan Yoder, Leah H. Jamieson
Department of Electrical and Computer Engineering Technical Reports
For years researchers have worked toward finding a way to allow people to talk to machines in the same manner a person communicates to another person. This verbal man to machine interface, called speech recognition, can be grouped into three types: isolated word recognition, connected word recognition, and continuous speech recognition. Isolated word recognizers recognize single words with distinctive pauses before and after them. Continuous speech recognizers recognize speech spoken as one person speaks to another, continuously without pauses. Connected word recognition is an extension of isolated word recognition which recognizes groups of words spoken continuously. A group of words …
Optimal Placement For Multi-Terminal Nets, Mikhail J. Atallah, Susanne E. Hambrusch
Optimal Placement For Multi-Terminal Nets, Mikhail J. Atallah, Susanne E. Hambrusch
Department of Computer Science Technical Reports
No abstract provided.
The Tilde Project, Douglas E. Comer, John T. Korb, Thomas Murtagh, Walter Tichy
The Tilde Project, Douglas E. Comer, John T. Korb, Thomas Murtagh, Walter Tichy
Department of Computer Science Technical Reports
No abstract provided.