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Articles 41401 - 41430 of 50110
Full-Text Articles in Entire DC Network
Numerical And Experimental Studies On Adiabatic And Nonadiabatic Capillary Tubes With Hfc-134a, E. Dirik, C. Inan, M. Y. Tanes
Numerical And Experimental Studies On Adiabatic And Nonadiabatic Capillary Tubes With Hfc-134a, E. Dirik, C. Inan, M. Y. Tanes
International Refrigeration and Air Conditioning Conference
No abstract provided.
Solubility Of Hfc-32, Hfc-125, And Hfc-134a With Three Potential Lubricants, H. M. L. Kang, S. C. Zoz, M. B. Pate
Solubility Of Hfc-32, Hfc-125, And Hfc-134a With Three Potential Lubricants, H. M. L. Kang, S. C. Zoz, M. B. Pate
International Refrigeration and Air Conditioning Conference
No abstract provided.
The Evolution Of Abdominal Compression In Cardiopulmonary Resuscitation, Charles F. Babbs
The Evolution Of Abdominal Compression In Cardiopulmonary Resuscitation, Charles F. Babbs
Weldon School of Biomedical Engineering Faculty Publications
Objective: To review the history of external abdominal compression as an adjunct to cardiopulmonary resuscitation (CPR), tracking the development of five major themes over the course of the 20th century: 1) augmentation of peripheral resistance by physical means, 2) risk of hepatic injury with abdominal compression, 3) counterpulsation vs. sustained compression, 4) the abdominal pump mechanism, and 5) contact compression techniques. Methods: Literature retrieved from successive MEDLINE English-language searches was reviewed with a special emphasis on work and concepts highlighted by participants at the First Purdue Conference on Interposed Abdominal Compression-CPR, September 1992. Results: External abdominal compression of one form …
Signal Subspace Techniques For Source Localization With Circular Sensor Arrays, Cherian P. Mathews, Michael D. Zoltowski
Signal Subspace Techniques For Source Localization With Circular Sensor Arrays, Cherian P. Mathews, Michael D. Zoltowski
Department of Electrical and Computer Engineering Technical Reports
Estimating the directions-of-arrival (DOAs) of propagating plane waves is a problem of interest in a variety of applications including radar, mobile communications, sonar, and seismology. The widely studied uniform linear array (ULA) can only provide estimates of source bearings relative to the array axis. A planar. array is required if estimates of source azimuth and elevation are required (2D angle estimation). Uniform circular arrays (UCAs) have several properties that make them attractive for 2D angle estimation; e.g., directional patterns synthesized with UCAs can be electronically rotated in the plane of the array without significant change of beam shape. Two signal …
Numerical Modeling Of Cuinse2 An D Cdte Solar Cells, Jeffery L. Gray, Richard. J. Schwartz, Youn Jung Lee
Numerical Modeling Of Cuinse2 An D Cdte Solar Cells, Jeffery L. Gray, Richard. J. Schwartz, Youn Jung Lee
Department of Electrical and Computer Engineering Technical Reports
No abstract provided.
Effective Bandgap Shrinkage In Gaas, E. S. Harmon, Michael R. Melloch, Mark S. Lundstrom
Effective Bandgap Shrinkage In Gaas, E. S. Harmon, Michael R. Melloch, Mark S. Lundstrom
Department of Electrical and Computer Engineering Faculty Publications
Electrical measurements of the equilibrium np product (n2ie) in heavily doped n‐ and p‐GaAs were performed. The n2ieDproduct (where D is the diffusivity) was measured by fitting the collector current‐voltage characteristic of a homojunction bipolar transistor to an ideal diode equation modified to account for transport in thin base transistors.The n2ie product was then extracted from n2ieD by utilizing diffusivity results obtained with the zero‐field time‐of‐flight technique. Our results show significant effective band‐gap shrinkage in heavily doped p‐GaAs, and very little effective band‐gap shrinkage …
Thermal Velocity Limits To Diffusive Electron Transport In Thin‐Base Np+N Gaas Bipolar Transistors, E. S. Harmon, Michael R. Melloch, Mark S. Lundstrom, F. Cardone
Thermal Velocity Limits To Diffusive Electron Transport In Thin‐Base Np+N Gaas Bipolar Transistors, E. S. Harmon, Michael R. Melloch, Mark S. Lundstrom, F. Cardone
Department of Electrical and Computer Engineering Faculty Publications
We present experimental evidence that minority electron transport across a thin, quasineutral p+ GaAs region is limited by the thermal velocity of the electrons rather than by conventional diffusive transport. A set of GaAs homojunction np+n transistors with base widths of 4000, 2000, 1000, and 500 Å was fabricated and characterized. The diffusive modelpredicts that the dc collector current of the 500‐Å base width transistors should be eight times larger than the collector current of transistors with a 4000‐Å‐wide base. The experimental results, however, show only a factor of ~3.5 increase in collector current. The measured collector …
Energy Aspects In The Design Of Air Coolers For Indirect Refrigeration Systems, C. I. Ferreira
Energy Aspects In The Design Of Air Coolers For Indirect Refrigeration Systems, C. I. Ferreira
International Refrigeration and Air Conditioning Conference
No abstract provided.
Normalization Of Test Data For Refrigerant Compressors, L. Su
Normalization Of Test Data For Refrigerant Compressors, L. Su
International Compressor Engineering Conference
No abstract provided.
Tentative Study Of Asymmetry Wraps Scroll Compressor, Z. Qiao, B. Xu, Z. Xiong, H. Qiao
Tentative Study Of Asymmetry Wraps Scroll Compressor, Z. Qiao, B. Xu, Z. Xiong, H. Qiao
International Compressor Engineering Conference
No abstract provided.
Influence Of The Roller Velocity On The Flow Of Lubricating Oil In A Rolling Piston Compressor, J. L. Gasche, R. T. S. Ferreira, A. T. Prata
Influence Of The Roller Velocity On The Flow Of Lubricating Oil In A Rolling Piston Compressor, J. L. Gasche, R. T. S. Ferreira, A. T. Prata
International Compressor Engineering Conference
No abstract provided.
Interposed Abdominal Compression As An Adjunct To Cardiopulmonary Resuscitation, Charles F. Babbs, Jeffrey B. Sack, Karl B. Kern
Interposed Abdominal Compression As An Adjunct To Cardiopulmonary Resuscitation, Charles F. Babbs, Jeffrey B. Sack, Karl B. Kern
Weldon School of Biomedical Engineering Faculty Publications
The addition of interposed abdominal compression (IAC) to otherwise standard CPR provides external pressure over the abdomen in counterpoint to the rhythm of chest compression. Interposed abdominal compression is a simple manual technique that can supplement the use of adrenergic drugs to increase both coronary perfusion pressure and total blood flow during CPR. Mechanistically, manual abdominal compressions induce both central aortic and central venous pressure pulses. However, owing to differences in venous versus arterial capacitance, the former are usually greater than the latter, so that systemic perfusion pressure is enhanced. Moreover, practical experience and theoretical analysis have suggested subtle refinements …
Representation Of Color And Segmentation Of Color Images, Margaretha Schwarz, Lynne Grewe, Avi Kak
Representation Of Color And Segmentation Of Color Images, Margaretha Schwarz, Lynne Grewe, Avi Kak
Department of Electrical and Computer Engineering Technical Reports
We have discussed the various schemes used today for representing color, brought out the relationships between them, and, finally, discussed the edge and region based segmentation of color images. We have compared some commonly used segmentation techniques using different representations of color on real data. The report should prove useful as a first reading to students of computer vision interesting in the processing of color images.
A Study Of Dc Permanent Magnet Motor Noise Related To Line Current, Candace Rogers Suriano
A Study Of Dc Permanent Magnet Motor Noise Related To Line Current, Candace Rogers Suriano
Department of Electrical and Computer Engineering Technical Reports
Lightweight, compact and inexpensive DC permanent magnet motors are well suited for low cost high production use in industry. Unfortunately, the audible noise emanating from these motors can cause a false negative perception of the motor's quality. In cars, for example, fan motor noise can be a nuisance. The objective of this thesis is to examine the connection between motor noise and the line current wave form for a specific four pole DC permanent magnet motor. It is further concerned with identifying the underlying factors which influence the line current ripple. An audible noise to motor current transfer function is …
Storing Logical Form In A Shared-Packed. Forest, Mary P. Harper
Storing Logical Form In A Shared-Packed. Forest, Mary P. Harper
Department of Electrical and Computer Engineering Technical Reports
To compactly represent sentences containing syntactic ambiguity until the necessary information has been processed to refine the meaning, we have modified an all-path context-free grammar parser to generate a shared-packed parse forest annotated with logical form. An annotated shared-packed forest cannot contain every representation of a highly ambiguous sentence without using an intractable amount of space. Hence, our program stores procedure calls for creating all possible logical forms for a c.onstituent in the forest. The resulting forest contains the same number of nodes and is not much bigger than the original forest. Furthermore, the stored procedural information can be used …
Electron-Phonon And Electron-Electron Interactions In Quantum Transport, Gerhard Klimeck
Electron-Phonon And Electron-Electron Interactions In Quantum Transport, Gerhard Klimeck
Department of Electrical and Computer Engineering Technical Reports
The objective of this work is to shed light on electron transport through sub-micron semiconductor structures, where electronic state quantization, electron-electron interactions and electron-phonon interactions are important. We concentrate here on the most developed vertical quantum device, the double barrier resonant tunneling diode. In this work we analyze particle interactions in two structural limits: 1) large, and 2) small cross-sections, in which the treatments are fundamentally different. Large cross-section structures involve particle-interactions with many electrons and these effects can be described in the Keldysh formalism in a single-particle picture by effective potentials. We present model calculations treating the phonon-peak a,nd …
The Design Of Compressor Muffler, S. Park, H. Kim, C. Lee, H. Youn, S. Cho, G. Im
The Design Of Compressor Muffler, S. Park, H. Kim, C. Lee, H. Youn, S. Cho, G. Im
International Compressor Engineering Conference
No abstract provided.
Leakage Calculation Through Clearances, Y. Huang
Leakage Calculation Through Clearances, Y. Huang
International Compressor Engineering Conference
No abstract provided.
A Substitute Of Roots Blower - Monotooth Rotary Compressor, P. C. Shu, Y. Tang, X. Y. Peng
A Substitute Of Roots Blower - Monotooth Rotary Compressor, P. C. Shu, Y. Tang, X. Y. Peng
International Compressor Engineering Conference
No abstract provided.
Lysholm Machines As Two-Phase Expanders, I. K. Smith, N. Stosic, C. A. Aldis
Lysholm Machines As Two-Phase Expanders, I. K. Smith, N. Stosic, C. A. Aldis
International Compressor Engineering Conference
No abstract provided.
Time Domain Approach To Gas Pulsation Modeling, H. J. Kim, W. Soedel
Time Domain Approach To Gas Pulsation Modeling, H. J. Kim, W. Soedel
International Compressor Engineering Conference
No abstract provided.
Design Of Compressor Valve System Utilizing An Expert System, K. R. Sung, J. Kim
Design Of Compressor Valve System Utilizing An Expert System, K. R. Sung, J. Kim
International Compressor Engineering Conference
No abstract provided.
Tutoring And Teaching: Continuum, Dichotomy, Or Dialectic, Helon Howell Raines
Tutoring And Teaching: Continuum, Dichotomy, Or Dialectic, Helon Howell Raines
The Writing Center Journal
No abstract provided.
Library Development In Lusophone Africa, Margaret O. Saunders, E. Stewart Saunders
Library Development In Lusophone Africa, Margaret O. Saunders, E. Stewart Saunders
Libraries Research Publications
Traces the history and development of libraries in Lusophone Africa. Covers public, academic, government, and scientific libraries; also covers library education and the library profession.
Library Development In Francophone Africa, Margaret O. Saunders, E. Stewart Saunders
Library Development In Francophone Africa, Margaret O. Saunders, E. Stewart Saunders
Libraries Research Publications
Traces the history and development of libraries in Francophone Africa. Covers public, academic, government, and scientific libraries; also covers library education and the library profession.
Hcfc-22 Alternatives For Air Conditioners And Heat Pumps, M. B. Shiflett
Hcfc-22 Alternatives For Air Conditioners And Heat Pumps, M. B. Shiflett
International Refrigeration and Air Conditioning Conference
No abstract provided.
Comparing Of Several Eos For Evaluation Of Narms' Thermodynamic Properties, X. Jin, X. Zhou, D. Xu
Comparing Of Several Eos For Evaluation Of Narms' Thermodynamic Properties, X. Jin, X. Zhou, D. Xu
International Refrigeration and Air Conditioning Conference
No abstract provided.
Opportunities And Limitations Of Building Precooling, K. R. Keeney, J. E. Braun
Opportunities And Limitations Of Building Precooling, K. R. Keeney, J. E. Braun
International Refrigeration and Air Conditioning Conference
No abstract provided.
Reducing Operating Costs With Optimal Maintenance Scheduling, T. M. Rossi, J. E. Braun
Reducing Operating Costs With Optimal Maintenance Scheduling, T. M. Rossi, J. E. Braun
International Refrigeration and Air Conditioning Conference
No abstract provided.
New Immiscible Refrigeration Lubricant For Hfcs, M. Sunami, K. Takigawa, S. Suda
New Immiscible Refrigeration Lubricant For Hfcs, M. Sunami, K. Takigawa, S. Suda
International Refrigeration and Air Conditioning Conference
No abstract provided.