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Rotating Cylinder Apparatus For Rarefied Gas Flow Studies, Darryl J. Alofs, George S. Springer
Rotating Cylinder Apparatus For Rarefied Gas Flow Studies, Darryl J. Alofs, George S. Springer
Mechanical and Aerospace Engineering Faculty Research & Creative Works
A Rotating Cylinder Type Apparatus is Described, Suitable for Determining Drag in Cylindrical Couette Flow of Rarefied Gases, and for Evaluating Tangential Momentum Accommodation Coefficients at Gas-Solid Boundaries. the Apparatus is Equipped with a Damping Device using Diffusion Pump Oil for Eliminating Undesirable Oscillations in the System. Tangential Momentum Accommodation Coefficients of Argon on Aluminum Were Determined with an Accuracy of ±2.5%. the Results Obtained Indicate that the Apparatus May Be Used over a Wide Pressure Range, Corresponding to Free Molecule and Continuum Flow Conditions. © 1970 the American Institute of Physics.
Diffusion In Wide Grain Boundaries, J. Mimkes, Manfred Wuttig
Diffusion In Wide Grain Boundaries, J. Mimkes, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
The rigorous solution of the grain-boundary diffusion problem has been approximated by a series expansion method. The calculations show that higher-order terms may be neglected in the bulk adjacent to the grain boundary. Thus, in this region Whipple's and Suzuoka's solutions represent a close approximation to the problem. Inside the grain boundary, however, higher-order approximations have to be taken into account. These approximations gain importance in the case of wide grain boundaries. The solutions obtained for an instantaneous source have been fitted to available grain-boundary diffusion data of Ni2+ in MgO at 1200°C. Numerical calculations give for the bulk diffusion …
Thermal Expansion Of Tungsten At Low Temperatures, Jayant S. Shah, Martin E. Straumanis
Thermal Expansion Of Tungsten At Low Temperatures, Jayant S. Shah, Martin E. Straumanis
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Phase Equilibria And Thermodynamic Studies In The System Cao-Feo-Fe2o3-Sio2, M. Timucin, Arthur E. Morris
Phase Equilibria And Thermodynamic Studies In The System Cao-Feo-Fe2o3-Sio2, M. Timucin, Arthur E. Morris
Materials Science and Engineering Faculty Research & Creative Works
Phase equilibria and thermodynamic properties of the system CaO-FeO-Fe2O3-SiO2 were studied at 1450° and 1550°C, over a range of pO2 from 1 to about 10-11 atm. Isothermal phase diagrams and activity-composition diagrams were constructed for 0, 5, 10, 20, and 30 wt pct SiO2 sections. The data are applicable to further understanding the behavior of simple BOF steelmaking slags. © 1970 The Minerals, Metals & Materials Society - ASM International - The Materials Information Society.
Low Cost Housing (How To Avoid The “Problem” In Three Words Or Less), Carl P. D. Sharpe
Low Cost Housing (How To Avoid The “Problem” In Three Words Or Less), Carl P. D. Sharpe
International Symposia on Low Cost Housing Problems
No abstract provided.
Low Cost Housing And The Problem Of Local Building Codes In The United States, Margaret E. Goertz
Low Cost Housing And The Problem Of Local Building Codes In The United States, Margaret E. Goertz
International Symposia on Low Cost Housing Problems
No abstract provided.
Search For Economic And Universal Housing Systems -- Some Design And Construction Experience, Zenon A. Zielinski
Search For Economic And Universal Housing Systems -- Some Design And Construction Experience, Zenon A. Zielinski
International Symposia on Low Cost Housing Problems
No abstract provided.
Development By Means Of Semi-Permanent Building: A New, Practical Approach In Housing And City-Planning, B. E. Friedjung
Development By Means Of Semi-Permanent Building: A New, Practical Approach In Housing And City-Planning, B. E. Friedjung
International Symposia on Low Cost Housing Problems
No abstract provided.
"The Buckle-Shell", V. J. Meyers, V. C. Matzen
"The Buckle-Shell", V. J. Meyers, V. C. Matzen
International Symposia on Low Cost Housing Problems
No abstract provided.
A Hyper-Roof Concept For Low-Cost Housing, John V. Huddleston
A Hyper-Roof Concept For Low-Cost Housing, John V. Huddleston
International Symposia on Low Cost Housing Problems
No abstract provided.
Foundations For Low-Cost Housing, Norbert O. Schmidt
Foundations For Low-Cost Housing, Norbert O. Schmidt
International Symposia on Low Cost Housing Problems
No abstract provided.
Low Cost Housing Projects In India, A. R. Santhakumar
Low Cost Housing Projects In India, A. R. Santhakumar
International Symposia on Low Cost Housing Problems
No abstract provided.
Effect Of The Supply Of Low Cost Housing On In-Migration Of The Unskilled, Daniel L. Babcock
Effect Of The Supply Of Low Cost Housing On In-Migration Of The Unskilled, Daniel L. Babcock
International Symposia on Low Cost Housing Problems
No abstract provided.
Impact Of Planned Policy And Sociological Factors On Low Cost Housing Programmes, D. R. Sikka
Impact Of Planned Policy And Sociological Factors On Low Cost Housing Programmes, D. R. Sikka
International Symposia on Low Cost Housing Problems
No abstract provided.
Low Cost Housing: The Necessity Of Interdisciplinary Skills, Margaret K. Thorpe, Dwight D. Zeck
Low Cost Housing: The Necessity Of Interdisciplinary Skills, Margaret K. Thorpe, Dwight D. Zeck
International Symposia on Low Cost Housing Problems
No abstract provided.
Cultural Bases Of Preference For The Visual Appearance Of Residential Environments, Peter G. Flachsbart, George L. Peterson
Cultural Bases Of Preference For The Visual Appearance Of Residential Environments, Peter G. Flachsbart, George L. Peterson
International Symposia on Low Cost Housing Problems
No abstract provided.
The Fe-Ho Binary System, G. J. Roe, Thomas J. O'Keefe
The Fe-Ho Binary System, G. J. Roe, Thomas J. O'Keefe
Materials Science and Engineering Faculty Research & Creative Works
The Fe-Ho phase diagram was determined on the basis of data obtained by X-ray diffraction, metallographic and differential thermal analysis techniques. Since emphasis was centered in the region where intermetallic compounds predominate, neither the iron nor holmium terminal regions were included in this study. Eutectic reactions were found to occur at 16.5 wt pct Fe and 875° C, 61 wt pct Fe and 1284° C, and 79 wt pct Fe and 1338° C. The congruent melting points of the compounds Ho6Fe23 and Ho2Fe17 were found to be 1332° and 1343° C, respectively. Two other intermetallic compounds were found, HoFe2 and …
Rotating Cylinder Apparatus For Rarefied Gas Flow Studies, Darryl J. Alofs, George S. Springer
Rotating Cylinder Apparatus For Rarefied Gas Flow Studies, Darryl J. Alofs, George S. Springer
Mechanical and Aerospace Engineering Faculty Research & Creative Works
A rotating cylinder type apparatus is described, suitable for determining drag in cylindrical Couette flow of rarefied gases, and for evaluating tangential momentum accommodation coefficients at gas-solid boundaries. The apparatus is equipped with a damping device using diffusion pump oil for eliminating undesirable oscillations in the system. Tangential momentum accommodation coefficients of argon on aluminum were determined with an accuracy of ± 2.5%. The results obtained indicate that the apparatus may be used over a wide pressure range, corresponding to free molecule and continuum flow conditions.
A Simplification Heuristic For Large Flow Tables, R. J. Smith, James H. Tracey
A Simplification Heuristic For Large Flow Tables, R. J. Smith, James H. Tracey
Electrical and Computer Engineering Faculty Research & Creative Works
Flow tables specifying large asynchronous sequential circuits often contain more internal states than are required to specify desired circuit behavior. Known minimization techniques appear unsuited for reduction of such large (rows X columns > 250) flow tables, because of excessive computation and intermediate data requirements for problems of this size. The algorithm described here is intended to rapidly produce a simplified-but in general non-minimal-flow table. It is most economical when applied to extremely large tables and was devised primarily for automated design applications. The procedure has been programmed in PL/1 and has been incorporated into an asynchronous sequential circuit design automation …
Electron Emitter Tips And Method, P. D. Ownby
Electron Emitter Tips And Method, P. D. Ownby
Materials Science and Engineering Faculty Research & Creative Works
Boron is deposited on the (110) plane facet at the center of a tungsten electron emitter tip by chemical vapor deposition of boron triiodide. The emission current density is greatest in the center of the emitting area (FIG. 2).
Proceedings Of The International Symposium On Low Cost Housing Problems Related To Urban Renewal And Development, Oktay Ural
International Symposia on Low Cost Housing Problems
PREFACE TO SECOND EDITION--We are very happy to have a second printing of the Proceedings of the First International Symposium on Low-Cost Housing Problems Related to Urban Renewal and Development. The rather quick and large demand of this publication proved to us, once more, the importance and timeliness of the concern on the topic of housing technology and production. The contributions from eighteen nations painted a real picture of housing conditions and needs around the world.
The fifty-one technical papers included in this volume have been selected intentionally in various aspects of housing to draw a complete and meaningful picture …
Magnetohydrodynamic Stability Of Laminar Flow In The Entrance Region Of A Parallel-Plate Channel, Thomas Eldon Eaton
Magnetohydrodynamic Stability Of Laminar Flow In The Entrance Region Of A Parallel-Plate Channel, Thomas Eldon Eaton
Masters Theses
"The hydrodynamic stability of laminar flow of an electrically conducting fluid flowing in a parallel-plate channel with an applied transverse magnetic field is investigated. The linear perturbation theory of hydrodynamic stability along with the assumption of low magnetic Reynolds number is applied to the governing equations to derive the governing rnagnetohydrodynarnic stability equation. A finite difference scheme is employed to numerically solve the magnetohydrodynamic stability equation. Neutral stability characteristics of the flow in the entrance region are obtained and presented. The neutral stability characteristics of the fully developed Hartmann flow are also re-examined and compared with those of a previous …
An Sem Surface Study Of Nucleate Pool Boiling Heat Transfer To Saturated Liquid Nitrogen Reduced Pressures From 0.1 To 0.9, David Virgil Porchey
An Sem Surface Study Of Nucleate Pool Boiling Heat Transfer To Saturated Liquid Nitrogen Reduced Pressures From 0.1 To 0.9, David Virgil Porchey
Doctoral Dissertations
"This study constituted an examination of both nucleate boiling and maximum heat flux characteristics of liquid nitrogen boiling from characterized surfaces. Several textures of gold plated copper surfaces were studied in addition to silver and silver oxide surfaces. Data were taken over a wide range of reduced pressures. All surfaces were examined using a Scanning Electron Microscope (SEM). Data and micrograph comparison revealed that both surface chemistry and surface roughness affect the nucleate boiling characteristics of liquid nitrogen. These effects are separated from each other showing that nucleate boiling is a function of both surface chemistry and topography. Surface roughness …
A Case For University Credits For Industry's In-House Continuing Education Programs, Robert E. Carlile
A Case For University Credits For Industry's In-House Continuing Education Programs, Robert E. Carlile
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
The minerals industries have long recognized the tangible and intangible returns from continuing education programs for their technical scientific and administrative personnel. These programs originate from the mutual desires of the employer to upgrade the professional competence of the employee and the employee's concurrent desires to keep abreast of new developments to review the state of the art of specialized subjects and to better qualify himself to compete in an every changing technology. In-house training and continuing education programs to provide such review and education for the employee are becoming a recognized function of companies comprising this industry. These company-sponsored …
Case Study And Analysis Of A Low Cost Housing Project In An Urban Area In India, P. Purusothaman, Jawalker K. Sridhar Rao
Case Study And Analysis Of A Low Cost Housing Project In An Urban Area In India, P. Purusothaman, Jawalker K. Sridhar Rao
International Symposia on Low Cost Housing Problems
An urban development project involving residential and school buildings as an extension of Madras city is described. The analysis of the project is made using the systems approach as a problem of human settlements. The methods adopted for efficient utilisation of space at optimal cost by functional planning, use of prefabricated units and use of new constructional procedures is described. The interrelationship between environmental, technical, social, cultural, psychological, economic, financial and management factors in making decisions for the project is discussed.
State Assignment Selection In Asynchronous Sequential Circuits, Gary K. Maki, James H. Tracey
State Assignment Selection In Asynchronous Sequential Circuits, Gary K. Maki, James H. Tracey
Electrical and Computer Engineering Faculty Research & Creative Works
Methods already exist for the construction of critical race-free assignments for asynchronous sequential circuits. Some of these methods permit the construction of many assignments for the same flow table. The algorithm presented here consists of two easy to apply tests which select that critical race-free assignment most likely to produce a set of simple next-state equations. The algorithm has been programmed. Copyright © 1970 by The Institute of Electrical and Electronics Engineers, Inc.
Baseband Agc In An Am-Fm Telemetry System, Richard S. Simpson, William H. Tranter
Baseband Agc In An Am-Fm Telemetry System, Richard S. Simpson, William H. Tranter
Electrical and Computer Engineering Faculty Research & Creative Works
The use of AGc loops at the input and output of the FM link in an AM-FM telemetry system allows the mean-square transmitter deviation to be maintained near maximum value, even though data may be nonstationary. However, errors result because of the inability of the receiver AGc loop to track perfectly gain variations in the transmitter loop. In this paper the general characteristics of AGc are discussed, and a theoretical analysis is performed to determine the time constant, steady-state error, and tracking error for a first-order loop. Also, tracking error for first order and second-order loops is investigated by simulation. …
Fault Detection In Asynchronous Sequential Circuits, Jeng-Chuan Kau
Fault Detection In Asynchronous Sequential Circuits, Jeng-Chuan Kau
Masters Theses
"As the asynchronous sequential circuit has become more and more important to digital systems in recent years high reliability and simple maintenance of the circuit is stressed. This paper presents a fault-detection algorithm which will be applicable to most of the practical asynchronous sequential circuits. The asynchronous sequential circuit is treated from the combinatoric point of view. First the minimal set of states, both stable states and unstable states, sufficient to detect all possible faults of the circuit is found from the fault table. Then a test sequence is generated to go through these states. It is assumed that testing …
A Socio-Economic Traffic Demand Prediction Model Based On A Lumped System Approach, John Edward Thompson
A Socio-Economic Traffic Demand Prediction Model Based On A Lumped System Approach, John Edward Thompson
Masters Theses
"The objective of this investigation was to devise a method for predicting transportation system demand based on socio-economic variables of certain physical areas. This pilot study was performed utilizing traffic flow, but minor mathematical alterations could change the transportation system to urban mass transit usage demand. An area of uniform socio-economic characteristics can be delineated and the socio-economic characteristics isolated. Each area will place a distinct demand on some existing transportation facility based on those characteristics. The physical demand can be approximated by a theoretical probability distribution. Once this internal flow generation has been approximated by the frequency distribution, it …
Interface Thermal Conductance With Metal Screens As Interstitial Material, William Edward Stewart Jr.
Interface Thermal Conductance With Metal Screens As Interstitial Material, William Edward Stewart Jr.
Masters Theses
"This thesis reports the results of an experimental investigation to determine the thermal conductance at the interface of metal specimens separated by wire mesh. Sets of metal specimens of copper, 2024-T4 aluminum, and 304 stainless steel were used. The specimens were cylindrical, axially aligned, and hydraulically loaded. All tests were conducted in an air environment. Pressure applied to the specimens ranged from 50 to 500 psig. Surface roughness of the interfaces varied from 5 to 20 micro inches. The wire mesh separators were of 304 stainless steel in 20, 30, 40, and 50 mesh. Results of the experiments show that: …