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Articles 11461 - 11490 of 13220
Full-Text Articles in Entire DC Network
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 …
The Missouri Miner, October 14, 1970
The Missouri Miner, October 14, 1970
The Missouri Miner Newspaper
No abstract provided.
Shelly-Modular Housing System, Luis E. Mora
Shelly-Modular Housing System, Luis E. Mora
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.
Missouri S&T Magazine, October 1970, Miner Alumni Association
Missouri S&T Magazine, October 1970, Miner Alumni Association
Missouri S&T Magazine
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 30, 1970
The Missouri Miner, September 30, 1970
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, September 16, 1970
The Missouri Miner, September 16, 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.
Missouri S&T Magazine, August 1970, Miner Alumni Association
Missouri S&T Magazine, August 1970, Miner Alumni Association
Missouri S&T Magazine
No abstract provided.
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, May 20, 1970
The Missouri Miner, May 13, 1970
The Missouri Miner, May 06, 1970
The Missouri Miner, April 29, 1970
The Missouri Miner, April 17, 1970
The Missouri Miner, March 04, 1970
The Missouri Miner, February 25, 1970
The Missouri Miner, February 25, 1970
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, February 18, 1970
The Missouri Miner, February 18, 1970
The Missouri Miner Newspaper
No abstract provided.
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.
Interior Corrosion Of Structural Steel Closed Sections, American Iron And Steel Institute
Interior Corrosion Of Structural Steel Closed Sections, American Iron And Steel Institute
CCFSS Library (1939 - present)
A survey of light poles, water-tank stanchions, orthotropic deck bridges, marine tubular catwalks, davits and welded steel columns strongly suggests, contrary to some beliefs, that interior surfaces of closed steel sections rust but little in the atmosphere, even when not fully sealed. Only light rusting occurs because amounts of oxy'gen and water in entrapped air are limited and condensation necessary for rusting is infrequent. Computations based on the oxidation reaction taking into account inside surface, volume of entrapped air, relative humidity and air changes show that the loss of iron thickness due to such rusting is negligible. Use of closed …
The Evaluation Of Radar Guided Missile Performance Using Various Target Glint Models, Franklin Delano Hockett
The Evaluation Of Radar Guided Missile Performance Using Various Target Glint Models, Franklin Delano Hockett
Masters Theses
"A radar guided missile seeker approaching a target arrives at a crossover point beyond which the entire target is illuminated by the missile seeker's radar antenna beam. When this occurs, for a complex target, the radar senses a time changing target center location which may greatly complicate the terminal tracking portion of the seeker's flight. This thesis documents various glint models in use today and compares the performance of these models by using a seeker model to determine the effect of glint on terminal tracking performance. A large volume of data has been compiled describing various radar characteristics of complex …
Exact Solution For A Model Of Dislocation Pipe Diffusion, J. Mimkes, Manfred Wuttig
Exact Solution For A Model Of Dislocation Pipe Diffusion, J. Mimkes, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
The dislocations are treated as an ideal array of parallel pipes of radius and diffusivity Dp embedded in the bulk material of the diffusivity Db. The exact solution of this problem of diffusion along semi-infinite edge dislocations is presented for cubic, tetragonal, and hexagonal crystals. The solution makes it possible to evaluate the dislocation pipe radius a and the ratio of diffusivities from one experiment. It is applied to experimental data for self-diffusion in tellurium available in the literature. The results of the calculations are a dislocation pipe radius a=(1.5 0.5)x10-4 cm and an activation energy for the pipe diffusion …
Glory Scattering In Molecular Collisions: Formal Expressions For The Total Cross Section, Louis Biolsi
Glory Scattering In Molecular Collisions: Formal Expressions For The Total Cross Section, Louis Biolsi
Chemistry Faculty Research & Creative Works
An Extended Distorted-Wave Treatment is Used to Obtain Formal Expressions for the Total Cross Section When Two Rigid Diatomic Molecules with Orbital and Nuclear-Spin Angular Momenta Collide. Explicit Expressions Are Obtained through Second Order, Including the Lowest-Order Inelastic Effects.
Column Research Council: Proceedings 1970, Column Research Council
Column Research Council: Proceedings 1970, Column Research Council
CCFSS Library (1939 - present)
The purposes of Column Research Council are to study and discuss problems related to the stability and strength of metal compression members; to organize research in this field; to disseminate information; and to formulate design rules for consideration by specification-writing bodies. The activities of the Council in 1970 are summarized in this report. A particular feature is the Proceedings of the 1970 Annual Technical Session. As in the past, the rosters of members of the Council and the By-Laws are also included. The support and technical contributions of the members and investigators are sincerely appreciated. Those individuals and organizations that …
The Rollamo 1970, University Of Missouri - Rolla
Search Algorithms For The Simple Plant Location Problem, John Bruce Prater
Search Algorithms For The Simple Plant Location Problem, John Bruce Prater
Doctoral Dissertations
"Two algorithms are developed, one exact, one approximate, for finding solutions to the simple plant location problem. Theorems are proved which give sufficient conditions for the inclusion of a plant in the optimal solution. The exact algorithm which is developed is similar to the Branch and Bound method. The approximate technique consists of a directed search through the solution tree for the problem, followed by terminal iterations. The terminal iterations are justified by empirical results obtained from a preliminary version of the technique and a theorem which is proved. Statistics from the results of applying the algorithm to a large …
Use Of The Turbulence Kinetic Energy Equation In Prediction Of Nonequilibrium Turbulent Boundary Layers, William Madison Byrne Jr.
Use Of The Turbulence Kinetic Energy Equation In Prediction Of Nonequilibrium Turbulent Boundary Layers, William Madison Byrne Jr.
Doctoral Dissertations
"A differential method is proposed for the prediction of a broad range of turbulent boundary layers of engineering and scientific interest. A digital computer program is presented which is applicable to boundary layers with positive, negative, and zero pressure gradient in the main-stream direction as well as boundary layers with suction, blowing or zero mass addition at the wall. The turbulence kinetic energy equation is solved simultaneously with the longitudinal momentum and continuity equations to provide an independent means for determining the effective viscosity which makes allowance for "history" effects in the flow. It is shown that the prediction method …
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 = …
An Explicit Simulation Of Overland Flow, Glendon Taylor Stevens
An Explicit Simulation Of Overland Flow, Glendon Taylor Stevens
Masters Theses
"Computer simulation of overland flow requires a mathematical model which converges to a true solution. This paper presents a method, based on measurable physical parameters, which insures convergence of a fixed grid explicit numerical solution. Analysis of a wide range of overland flow plane parameters has resulted in an equation of the form Δt = 0. 2 ΔX/So, for the time step increment. This equation provides values for Δt that will insure stability and convergence of the fixed grid explicit numerical method of solving the spatially varied unsteady flow equations. The effect of subarea shape on the rising …