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Articles 41851 - 41880 of 50110
Full-Text Articles in Entire DC Network
Interposed Abdominal Compression-Cpr: A Case Study In Cardiac Arrest Research, Charles F. Babbs
Interposed Abdominal Compression-Cpr: A Case Study In Cardiac Arrest Research, Charles F. Babbs
Weldon School of Biomedical Engineering Faculty Publications
When the abdomen is compressed manually in counterpoint to the rhythm of chest compression, in the performance of interposed abdominal compression-CPR, artificial circulation is approximately doubled in animal experiments and in electronic models of the circulatory system. These studies suggest that external manual compression of the abdominal aorta acts like an intra-aortic balloon pump to increase aortic pressure, whereas external manual compression of the abdominal veins acts to prime the right heart and pulmonary vessels before the next chest compression. As a result, perfusion pressures and flows are increased. Several clinical studies of this technique have shown promising results, including …
Development Of A Rapidly Computable Descriptor Of Prostate Tissue Temperature During Transurethral Conductive Heat Therapy For Benign Prostate Hyperplasia, U H. Patel, Charles F. Babbs
Development Of A Rapidly Computable Descriptor Of Prostate Tissue Temperature During Transurethral Conductive Heat Therapy For Benign Prostate Hyperplasia, U H. Patel, Charles F. Babbs
Weldon School of Biomedical Engineering Faculty Publications
Benign prostate hyperplasia (BPH) is a condition in older men in which the mass of tissue in the prostate gland gradually increases over the course of many years, ultimately leading to urinary outflow obstruction. Current treatment of this condition is to surgically remove the obstructing tissue. One novel alternative therapy being studied is transurethral thermocoagulation of excessive prostatic mass. In this approach, a heat emitting catheter is placed in the prostatic urethra, and the intraprostatic segment of the catheter is heated to temperatures above 60 oC for one hour. Two dimensional cylindrical coordinate computer simulations of this treatment modality were …
Meta-State Conversion, H. G. Dietz
Meta-State Conversion, H. G. Dietz
Department of Electrical and Computer Engineering Technical Reports
In MIMD (Multiple Instruction stream, Multiple Data stream) execution, each processor has its own state. Although these states are generally considered to be independent entities, it is also possible to view the set of processor states at a particular time as single, aggregate, "Meta State." Once a program has been converted into a single finite automaton based on Meta States, only a single proram counter is needed. Hence, it is possible to duplicate the MIMD execution using SIMD (Single Instruction stream, Multiple Data stream) hardware without the ovehead of interpretation or even of having each processing element keep a copy …
Would You Run It Here ... Or There? (Ahs: Automatic Heterogeneous Supercomputing), H. G. Dietz, W. E. Cohen, B. K. Grant
Would You Run It Here ... Or There? (Ahs: Automatic Heterogeneous Supercomputing), H. G. Dietz, W. E. Cohen, B. K. Grant
Department of Electrical and Computer Engineering Technical Reports
Parallel programs often exhibit strong preferences for different system structures, and machines with the ideal structures may all be available within a single heterogeneous network. There is also the complication that, although a particular application might execute fastest when running by itself on one system, the best turnaround time might result from running the program on a diffeient system that is less heavily loaded at the time the job is submitted. In this paper, we suggest that application programmers should be able to write their code using whatever programming model, control or data parallel, they feel is most appropriate - …
A Spectral Flux Method For Solving The Boltzmann Equation, Muhammad A. Alam, Mark A. Stettler, Mark S. Lundstrom
A Spectral Flux Method For Solving The Boltzmann Equation, Muhammad A. Alam, Mark A. Stettler, Mark S. Lundstrom
Department of Electrical and Computer Engineering Faculty Publications
A spectral method for solving the Boltzmann equation by the scattering matrix approach is presented, The algorithm discussed can be used to simulate both bulk and device properties with arbitrary field profiles. Although the primary goal is to reduce the data storage problem of the scattering matrix approach, many of the concepts and mathematical properties developed may be useful for other traditional spectral methods as well.
Minority-Carrier Mobility Enhancement In P+ Ingaas Lattice Matched To Inp, E. S. Harmon, Michael L. Lovejoy, Michael R. Melloch, Mark S. Lundstrom, D. Ritter, R. A. Hamm
Minority-Carrier Mobility Enhancement In P+ Ingaas Lattice Matched To Inp, E. S. Harmon, Michael L. Lovejoy, Michael R. Melloch, Mark S. Lundstrom, D. Ritter, R. A. Hamm
Department of Electrical and Computer Engineering Faculty Publications
Minority electron mobilities in pf-In0.ssGac4, As have been measured with the zero field time-of-flight technique. The room-temperature (297 K) minority electron mobilities for p+-In,, 53Gac47A~ doped 0.9 and 3.1 x 10” cmm3 are found to be 2900 and 3300 cm* V-’ s-l, respectively. These are the first measurements to demonstrate enhancement in minority-carrier mobility as doping is increased for heavily doped Ines3Gae.4+s. This enhancement in mobility as doping is increased is similar to that observed in p+-GaAs, which has been attributed to reductions in plasmon and carrier-carrier scattering between minority electrons and majority holes.
Concentration‐Dependent Optical‐Absorption Coefficient In N‐Type Gaas, Gregory Benedict Lush, H. F. Macmillan, S. Asher, Michael R. Melloch, Mark S. Lundstrom
Concentration‐Dependent Optical‐Absorption Coefficient In N‐Type Gaas, Gregory Benedict Lush, H. F. Macmillan, S. Asher, Michael R. Melloch, Mark S. Lundstrom
Department of Electrical and Computer Engineering Faculty Publications
The doping-dependent, near-band-edge optical-absorption coefficient CY(h v) was deduced from optical transmission measurements in n-type GaAs thin films. The selenium-doped films were grown by metalorganic chemical-vapor deposition and do ed to produce room-temperature electron concentrations from 1.3 x 10” to 3.8X 1018 cm- P . The transmission measurements covered photon energies between 1.35 and 1.7 eV and were performed on double heterostructures with the substrate removed by selective etching. The results show good qualitative agreement with previous studies and good quantitative agreement, except for the heavily doped samples. For na=3.8 X 10” cme3, a( 1.42 eV> is approximately four times …
Experimental Observation Of A Minority Electron Mobility Enhancement In Degenerately Doped P-Type Gaas, E. S. Harmon, Michael L. Lovejoy, Michael R. Melloch, Mark S. Lundstrom, T. J. De Lyon, J. M. Woodall
Experimental Observation Of A Minority Electron Mobility Enhancement In Degenerately Doped P-Type Gaas, E. S. Harmon, Michael L. Lovejoy, Michael R. Melloch, Mark S. Lundstrom, T. J. De Lyon, J. M. Woodall
Department of Electrical and Computer Engineering Faculty Publications
The variation of minority electron mobility with doping density in p+-GaAs has been measured with the zero-field time-of-flight technique. The results from a series of nine GaAs films doped between 1 X lOI and 8 X 10” cmm3 show the mobility decreasing from 1950 cm2 V-’ s-l at 1 X 10” cmm3 to 1370 cm2 V-l s-l at 9X 10” cmB3. For the doping range 9 x 1018-8x 1019 cme3, the decreasing trend in mobility is reversed. The measured mobility of 3710 cm2 V-’ s-l at 8 X 10” cmp3 is about three times higher than the measured value at …
Modeling With A-Patches, Chandrajit L. Bajaj, Jindon Chen, Guoliang Xu
Modeling With A-Patches, Chandrajit L. Bajaj, Jindon Chen, Guoliang Xu
Department of Computer Science Technical Reports
No abstract provided.
Collaborative Multimedia Scientific Design In Shastra, Vinod Anupam, Chandrajit L. Bajaj
Collaborative Multimedia Scientific Design In Shastra, Vinod Anupam, Chandrajit L. Bajaj
Department of Computer Science Technical Reports
No abstract provided.
Time-Optimal Trajectories For Cooperative Multi-Manipulator Systems, Seungbin B. Moon, Shaheen Ahmad
Time-Optimal Trajectories For Cooperative Multi-Manipulator Systems, Seungbin B. Moon, Shaheen Ahmad
Department of Electrical and Computer Engineering Technical Reports
In this paper we present two schemes for planning the time-optimal trajectory for cooperative multi-manipulator system(CMMS) carrying a common object. We assume that the desired path is given and parameterizable by an arclength variable. Both approaches take into account the dynamics of the manipulators and the dynamics of the object. The first approach employs linear programming techniques, and it allows us to obtain the timeoptimal execution of the given task utilizing the maximum torque capacities of the joint motors. The second approach is a sub-time-optimal method which is computationally very efficient. In the second approach we try to divide the …
Compiler-Assisted Cache Coherence, Chiiwen Liou, Henry G. Dietz
Compiler-Assisted Cache Coherence, Chiiwen Liou, Henry G. Dietz
Department of Electrical and Computer Engineering Technical Reports
Although it is convenient to program multiprocessors as though all processors share access to the same memory, it is difficult to construct hardware directly implementing this model. Allowing each processor to have its own independent cache partially solves this problem; unfortunately, different caches might hold different values for the same main memory address. Making the cache hardware always be coherent - one value per address - makes the hardware expensive and slow. This paper proposes compiler analysis to generate explicit cache control instructions to ensure that all program memory accesses execute as though the caches were coherent. Compared to other …
Feature Extraction And Classification Algorithms For High Dimensional Data, Chulhee Lee, David Landgrebe
Feature Extraction And Classification Algorithms For High Dimensional Data, Chulhee Lee, David Landgrebe
Department of Electrical and Computer Engineering Technical Reports
In this research, feature extraction and classification algorithms for high dimensional data are investigated. Developments with regard to sensors for Earth observation are moving in the direction of providing much higher dimensional multispectral imagery than is now possible. In analyzing such high dimensional data, processing time becomes an important factor. With large increases in dimensionality and the number of classes, processing time will increase significantly. To address this problem, a multistage classification scheme is proposed which reduces the processing time substantially by eliminating unlikely classes from further consideration at each stage. Several truncation criteria are developed and the relationship between …
High Temperature Ohmic Contact Technology To N-Type Gaas, James Eun, James A. Cooper Jr.
High Temperature Ohmic Contact Technology To N-Type Gaas, James Eun, James A. Cooper Jr.
Department of Electrical and Computer Engineering Technical Reports
As the reliability issues become more prevalent in the electronics industry, a properly engineered device must sustain its high performance characteristics not only under the ideal operating conditions but also under the hostile environments. Among many harsh environments that must be taken into considerations, the high temperature environment is the predominant concern for many industries, especially for automobile, aerospace, and military industry. In order for a device to properly operate and hold its original characteristics reliably at any elevated temperature for an extended period of time, one of the most critical requirements that must be met is the thermal stability …
Micromechanical Sensors Using Merged Epitaxial Lateral Overgrowth Of Silicon, James J. Pak, Gerold W. Neudeck, Abul E. Kabir
Micromechanical Sensors Using Merged Epitaxial Lateral Overgrowth Of Silicon, James J. Pak, Gerold W. Neudeck, Abul E. Kabir
Department of Electrical and Computer Engineering Technical Reports
A novel technology for manufacturing thin silicon diaphragm structures is presented. Controllability of thin silicon diaphragm is one of the most important issues in fabricating silicon micromechanical sensors whose sensitivity depends on the diaphragm thickness. This can be accomplished by epitaxial lateral overgrowth (ELO) of single crystal silicon on a patterned layer of masking material, typically Si02, combined with crystallographic etching of which etching rate depends on the crystal plane. With recent improvement of EL0 material, good quality of lOμm thick, 200μm x lOOOμm single crystal silicon was obtained with its thickness being precisely controlled by growth rate (≤ lμ …
Distributed Modeling And Rendering Of Splines Using Ganith And Splinex, Chandrajit L. Bajaj, Jindon Chen, Susan B. Evans
Distributed Modeling And Rendering Of Splines Using Ganith And Splinex, Chandrajit L. Bajaj, Jindon Chen, Susan B. Evans
Department of Computer Science Technical Reports
No abstract provided.
A Coarse-Grained, Architecture-Independent Approach For Connected Component Labeling, Mikhail J. Atallah, Frank Dehne, Susanne E. Hambrusch
A Coarse-Grained, Architecture-Independent Approach For Connected Component Labeling, Mikhail J. Atallah, Frank Dehne, Susanne E. Hambrusch
Department of Computer Science Technical Reports
No abstract provided.
Preconditioner Construction With Rational Approximation, Mo Mu, John R. Rice
Preconditioner Construction With Rational Approximation, Mo Mu, John R. Rice
Department of Computer Science Technical Reports
No abstract provided.
An Optimal Algorithm For Shortest Paths On Weighted Interval And Circular-Arc Graphs With Applications, Mikhail J. Atallah, Danny Z. Chen, D. T. Lee
An Optimal Algorithm For Shortest Paths On Weighted Interval And Circular-Arc Graphs With Applications, Mikhail J. Atallah, Danny Z. Chen, D. T. Lee
Department of Computer Science Technical Reports
No abstract provided.
Topologically Correct Approximations Of Arbitrary Rational Parametric, Chandrajit L. Bajaj, Andrew V. Royappa
Topologically Correct Approximations Of Arbitrary Rational Parametric, Chandrajit L. Bajaj, Andrew V. Royappa
Department of Computer Science Technical Reports
No abstract provided.
A Unifying Approach To Hierarchical Transaction Management In Multidatabase Systems, Ahmed K. Almagarmid, Aidong Zhang
A Unifying Approach To Hierarchical Transaction Management In Multidatabase Systems, Ahmed K. Almagarmid, Aidong Zhang
Department of Computer Science Technical Reports
No abstract provided.
On The Semantics Of Generative Geometry Representations, Christoph M. Hoffmann
On The Semantics Of Generative Geometry Representations, Christoph M. Hoffmann
Department of Computer Science Technical Reports
No abstract provided.
Chemical Admixtures Of Highway Concrete: Fundamental Research And A Guide To Usage, Sidney Diamond, Keisuke Matsukawa
Chemical Admixtures Of Highway Concrete: Fundamental Research And A Guide To Usage, Sidney Diamond, Keisuke Matsukawa
JTRP Technical Reports
No abstract provided.
A Zepetneki Tötösy Család Adattára / Records Of The Tötösy De Zepetnek Family, Steven Totosy De Zepetnek
A Zepetneki Tötösy Család Adattára / Records Of The Tötösy De Zepetnek Family, Steven Totosy De Zepetnek
CLCWeb Library
A Zepetneki Tötösy család adattára/Records of the Tötösy de Zepetnek Family (Szeged: Attila József University, 1993. ISBN 9634819141 ©Steven Tötösy de Zepetnek https://docs.lib.purdue.edu/clcweblibrary/totosyrecords1993 ) contains transcripts of published data, archival and family documents, and genealogies of the Tötösy de Zepethnek family and its selected collateral families. A Zepetneki Tötösy család adattára includes data about other Töt(t)ös(s)(i)y families not related by origin to the Tötösy de Zepetnek family. The revised and updated version of the 1993 print book is Records of the Tötösy de Zepetnek Family/A Zepetneki Tötösy család adattára. West Lafayette: Purdue University Press, 2010-. ISSN 1715-152X …
Non-Native Speakers As Students In First-Year Composition Classes With Native Speakers: How Can Writing Tutors Help?, Barbara L. Kennedy
Non-Native Speakers As Students In First-Year Composition Classes With Native Speakers: How Can Writing Tutors Help?, Barbara L. Kennedy
The Writing Center Journal
No abstract provided.
Bibliography Of Recent Writing Center Scholarship (April 1992-October 1993), Therese Marie Gyauch
Bibliography Of Recent Writing Center Scholarship (April 1992-October 1993), Therese Marie Gyauch
The Writing Center Journal
No abstract provided.
From The Editors, Diana George, Nancy Grimm, Edward Lotto
From The Editors, Diana George, Nancy Grimm, Edward Lotto
The Writing Center Journal
No abstract provided.
Humor And The Serious Tutor, Steve Sherwood
Humor And The Serious Tutor, Steve Sherwood
The Writing Center Journal
No abstract provided.