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Articles 16321 - 16350 of 17246
Full-Text Articles in Entire DC Network
Petrology And Petrography Of The Croweburg Coal, North-Central Missouri, William Keith Wedge
Petrology And Petrography Of The Croweburg Coal, North-Central Missouri, William Keith Wedge
Masters Theses
"Under a grant from the National Air Pollution Control Administration, the Missouri Geological Survey undertook a core drilling program of coals in north-central Missouri. The chemical and petrographic characteristics of five complete samples of the Croweburg coal recovered from this drilling project are major contributions of this study. Detailed lithologic logs of the drill cores are an additional contribution of the investigation. Megascopic lithotypes of vitrain, fusain, clarain, and durain as well as areas of mineral matter are described from polished column samples of the Croweburg coal for the first time in Missouri. Measured Croweburg coal sections from five drill …
Missouri S&T Magazine, December 1970, Miner Alumni Association
Missouri S&T Magazine, December 1970, Miner Alumni Association
Missouri S&T Magazine
No abstract provided.
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.
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.
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 …
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.
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.
New Towns, Leonard R. Mann
New Towns, Leonard R. Mann
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.
Preconditions For And Benefits Of The Development Of Low Cost Housing Technology, E. L. Keating, E. S. Miller
Preconditions For And Benefits Of The Development Of Low Cost Housing Technology, E. L. Keating, E. S. Miller
International Symposia on Low Cost Housing Problems
No abstract provided.
Earthquake Resistant Construction Features In Low Cost Buildings, A. S. Arya
Earthquake Resistant Construction Features In Low Cost Buildings, A. S. Arya
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.
The Mobile Home Is Low-Cost Housing -- Or Is It?, Walter L. Meyer
The Mobile Home Is Low-Cost Housing -- Or Is It?, Walter L. Meyer
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.
Increasing The Productivity Of Housing Development Corporations, Carol Van Astyne
Increasing The Productivity Of Housing Development Corporations, Carol Van Astyne
International Symposia on Low Cost Housing Problems
No abstract provided.
Doppler Shift In Frequency In The Transport Of Electromagnetic Waves Through An Underdense Plasma, Jerry Peacher, Kenneth M. Watson
Doppler Shift In Frequency In The Transport Of Electromagnetic Waves Through An Underdense Plasma, Jerry Peacher, Kenneth M. Watson
Physics Faculty Research & Creative Works
In an earlier publication, the validity of the radiation transport theory was studied for the calculation of multiple scattering of electromagnetic waves by a turbulent plasma. In the present paper, we extend the transport theory to include a description of the Doppler shift in frequency caused by electron motion.
The Missouri Miner, September 22, 1970
The Missouri Miner, September 22, 1970
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, September 11, 1970
The Missouri Miner, September 11, 1970
The Missouri Miner Newspaper
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.
Missouri S&T Magazine, June 1970, Miner Alumni Association
Missouri S&T Magazine, June 1970, Miner Alumni Association
Missouri S&T Magazine
No abstract provided.
The Missouri Miner, April 24, 1970
The Missouri Miner, April 03, 1970
Differential Cross Section For Charged A₁ Photoproduction Using The Regge Exchange Formalism, Keiji Kikkawa, Barbara N. Hale
Differential Cross Section For Charged A₁ Photoproduction Using The Regge Exchange Formalism, Keiji Kikkawa, Barbara N. Hale
Physics Faculty Research & Creative Works
The Regge-pole formalism is applied to the calculation of the differential cross section for A1+ photo-production in the region |tmin| < -t < 10µ2. The p, A1, A1-daughter, A2, and π trajectory contributions are considered, and use is made of chiral dynamics to estimate the unknown coupling constants. We find that the π and the A2 trajectories provide the dominant contributions.
A Heuristic Algorithm For Determining A Constructive Suboptimal Solution To The Combinatorial Problem Of Facility Allocation, Harry Kerry Edwards
A Heuristic Algorithm For Determining A Constructive Suboptimal Solution To The Combinatorial Problem Of Facility Allocation, Harry Kerry Edwards
Doctoral Dissertations
"The major problem in plant layout is to determine the most economical relative location of facilities. There are two distinct types of suboptimal solutions to this combinatorial problem: construction and improvement. The writer has developed Modular Allocation Technique (MAT) which is the first useful construction suboptimal technique. The MAT general algorithm, a theorem relating the MAT solution to the optimal solution and an example problem are given. A computer program has been written that will apply MAT to the allocation problem for a maximum of 40 facilities. Results are given to demonstrate how MAT solutions may be used as initial …
A Three-Dimensional Mathematical Simulator Of Multiphase Systems In A Petroleum Reservoir, Leonard Koederitz
A Three-Dimensional Mathematical Simulator Of Multiphase Systems In A Petroleum Reservoir, Leonard Koederitz
Doctoral Dissertations
"A generalized digital analysis for calculating three phase, three dimensional flow in reservoirs is developed. The computerized mathematical model is applicable to depletion drive, gas injection, water injection, and/or aquifer drive systems with modifications specific to the simulation criterion of that type of drive and includes fluid compressibility effects, gravity drainage and capillary pressure. The simulation allows arbitrary consideration of reservoir heterogeneity, geometry, well locations and rates of production. An innovation to the alternating direction technique for linear differential equations discussed by Brian is developed and employed in order to render the method of solution applicable to non-linear differential equations. …
Absolute Excitation Cross Sections Of He⁺ In 20-100 Kev He⁺-He Collisions Using Energy-Loss Spectrometry, Donald Roy Schoonover
Absolute Excitation Cross Sections Of He⁺ In 20-100 Kev He⁺-He Collisions Using Energy-Loss Spectrometry, Donald Roy Schoonover
Doctoral Dissertations
"Application of positive-ion energy-loss spectrometry has been extended to include experimental determination of absolute excitation cross sections of ground state helium ions. Helium ion-atom collisions were studied for impact energies ranging between 20-100 keV, in 10 keV intervals. The data were taken with an apparatus resolution between 0.6-o.8 eV FWHM. Cross sections for transitions from ground state to the second and third principal quantum levels of the ion plotted as a function of impact energy were still rapidly increasing at 100 keV. The cross sections at this energy were 1.64(± 0.28) x 10⁻¹⁸cm² for He⁺(l²s1/2) -> He⁺(n = …
Anodic Dissolution Of Zinc In Potassium Iodide-Potassium Iodate Solutions, Chi-Chiu Yao
Anodic Dissolution Of Zinc In Potassium Iodide-Potassium Iodate Solutions, Chi-Chiu Yao
Doctoral Dissertations
"The anodic dissolution of Zn was studied in KI-KIO₃ solutions at 25ºC. In I⁻ solutions, it was found that the apparent valence of Zn ions going into solution is approximately two. Smaller values are obtained in IO₃⁻ solutions, with the most pronounced changes occurring in the higher concentrations. An empirical equation is derived relating the apparent valence (or anode efficiency) to the current density and concentrations of IO₃⁻ and I⁻. An anodic dissolution mechanism is proposed"--Abstract, page 1.
Investigation Into The Monotonic Magnetostriction And Magnetic Breakdown In Cadmium, James Milo Carter
Investigation Into The Monotonic Magnetostriction And Magnetic Breakdown In Cadmium, James Milo Carter
Doctoral Dissertations
"Observations of the monotonic magnetostriction of cadmium at 4.2 K and in fields of 65 kilogauss have been made. The angular dependence of an extremal point (Hm) in the monotonic magnetostriction is found to follow inverse cosine behavior. The magnitude of Hm (27 kG) for fields parallel to [0001] is in fair agreement with the onset of γ1/3 from the breakdown of the trifoliate orbit, γ. The range of observation of hm coincides with the reported range of the trifoliate orbit. A "klink" in the monotonic magnetostriction is demonstrated. The "klink" field, Hk, …
Linear Regression Models Of Sound Velocity In The North Atlantic Ocean Below A Critical Depth, Richard Roland Kunkel
Linear Regression Models Of Sound Velocity In The North Atlantic Ocean Below A Critical Depth, Richard Roland Kunkel
Doctoral Dissertations
"Sound velocity models currently in use by the U. S. Navy require difficult data sampling at great expense. This study is to investigate the feasibility of a sound velocity model dependent only upon position that would be valid for a selected, reasonably large, near homogeneous area of the ocean. The most important position parameters are latitude, longitude, and depth. To accomplish this objective a critical depth of 2500 meters was established for an 8° by 20° rectangle of the Sargasso Sea which lies within the North Atlantic Ocean. The critical depth is defined as the depth at which the characteristics …