Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Engineering (11191)
- Physical Sciences and Mathematics (5143)
- Civil and Environmental Engineering (3649)
- Electrical and Computer Engineering (2398)
- Physics (2054)
-
- Materials Science and Engineering (1481)
- Mechanical Engineering (1467)
- Geotechnical Engineering (1451)
- Chemical Engineering (1445)
- Chemistry (1200)
- Computer Sciences (1081)
- Structural Engineering (904)
- Aerospace Engineering (861)
- Architecture (701)
- Architectural Engineering (678)
- Biochemical and Biomolecular Engineering (653)
- Mathematics (483)
- Statistics and Probability (464)
- Mining Engineering (441)
- Earth Sciences (434)
- Operations Research, Systems Engineering and Industrial Engineering (415)
- Ceramic Materials (414)
- Life Sciences (394)
- Geology (391)
- Metallurgy (386)
- Civil Engineering (383)
- Petroleum Engineering (379)
- Biology (320)
- Social and Behavioral Sciences (320)
- Biomedical Engineering and Bioengineering (264)
- Keyword
-
- Machine learning (86)
- Additive manufacturing (81)
- Rheology (71)
- Ionization (59)
- Optimization (54)
-
- Deep learning (50)
- Machine Learning (50)
- Hydrogen (49)
- Optimal Control (49)
- Microstructure (45)
- Stability (45)
- Electrons (44)
- Mechanical properties (44)
- Quantum Theory (43)
- Additive Manufacturing (42)
- Simulation (42)
- Article (39)
- Atoms (37)
- Concrete (35)
- Nanoparticles (35)
- Sustainability (35)
- Electromagnetic Interference (34)
- Helium (34)
- Molecules (34)
- Neurocontrollers (34)
- Adsorption (33)
- Gravitational waves (33)
- Electrodynamics (32)
- Mathematical Models (32)
- Neural Networks (32)
- Publication Year
- Publication
-
- Electrical and Computer Engineering Faculty Research & Creative Works (2013)
- Physics Faculty Research & Creative Works (1894)
- Masters Theses (1252)
- Civil, Architectural and Environmental Engineering Faculty Research & Creative Works (1125)
- Mechanical and Aerospace Engineering Faculty Research & Creative Works (1041)
-
- Doctoral Dissertations (1003)
- Chemistry Faculty Research & Creative Works (905)
- Materials Science and Engineering Faculty Research & Creative Works (888)
- Chemical and Biochemical Engineering Faculty Research & Creative Works (800)
- International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics (709)
- International Conference on Case Histories in Geotechnical Engineering (707)
- Computer Science Faculty Research & Creative Works (594)
- The Missouri Miner Newspaper (573)
- CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018) (559)
- Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works (478)
- Mathematics and Statistics Faculty Research & Creative Works (449)
- Engineering Management and Systems Engineering Faculty Research & Creative Works (272)
- Mining Engineering Faculty Research & Creative Works (268)
- Biological Sciences Faculty Research & Creative Works (259)
- Missouri S&T Magazine (147)
- Business and Information Technology Faculty Research & Creative Works (127)
- UMR-MEC Conference on Energy / UMR-DNR Conference on Energy (92)
- Arts, Languages and Philosophy Faculty Research & Creative Works (85)
- Psychological Science Faculty Research & Creative Works (74)
- Nuclear Engineering and Radiation Science Faculty Research & Creative Works (69)
- Opportunities for Undergraduate Research Experience Program (OURE) (56)
- Economics Faculty Research & Creative Works (55)
- Computer Science Technical Reports (54)
- CCFSS Library (1939 - present) (45)
- Undergraduate Research Conference at Missouri S&T (40)
- Publication Type
- File Type
Articles 16531 - 16560 of 17246
Full-Text Articles in Entire DC Network
A Numerical (Matrix) Solution For The Vibration Frequencies And Modes Of A Nonuniform Rectangular Plate With Arbitrary Edge Conditions, F. David Utterback
A Numerical (Matrix) Solution For The Vibration Frequencies And Modes Of A Nonuniform Rectangular Plate With Arbitrary Edge Conditions, F. David Utterback
Masters Theses
"The material presented in this thesis is designed to provide the practicing engineer with a practical, approximate method of solution for the increasingly important problem of plate vibrations. The technique presented herein is basically an application of the use of generalized coordinates to describe the elastic and inertial properties of a finite element representation of a nonuniform rectangular plate. The plate will be idealized by utilizing a modification of the grid work technique developed by Hrennifkoff as a lattice work of interconnecting beams. By employing the elastic displacements as generalized coordinates, the only required compatibility conditions are that the displacements …
An Experimental Method Of Determining The Thermal Accommodation Coefficients Of Metallic Surfaces, Raymond John Dethorne
An Experimental Method Of Determining The Thermal Accommodation Coefficients Of Metallic Surfaces, Raymond John Dethorne
Masters Theses
"In the free molecule regime, Knudsen number greater than 10, heat is transferred from a solid by radiation and conduction. The ability of a surface to emit radiant energy is governed by a surface property called emittance while the surface property which apparently regulates the amount of heat transferred by conduction is called the thermal accommodation coefficient. This thesis presents the results of an experimental investigation to determine a relationship between these two properties, emittance and thermal accommodation coefficient. A test apparatus was constructed to measure both the radiation and conduction contributions between two concentric cylinders. cylinders of aluminum and …
Spacing Of Explosive Charges, Calvin J. Konya
Spacing Of Explosive Charges, Calvin J. Konya
Masters Theses
"It is generally believed that the spacing of simultaneously initiated collar primed multiple charges is not dependent on the charge length. The stresses generated by explosive charges have been assumed to propagate through a material in a cylindrical manner. this assumption implied that the stress generated in any plane along the charge diameter would have been uniform in magnitude and direction. A finite explosive velocity along with a conical stress wave causes the stresses near the collar to differ from those farther down the column. for this reason, the spacing of charges would be dependent on charge length. An experimental …
An Intragastric Ph And Motility Monitoring And Automatic Titration System, Barry Foster Maycock
An Intragastric Ph And Motility Monitoring And Automatic Titration System, Barry Foster Maycock
Masters Theses
"Knowledge of the effects of prolonged states of weightlessness on the physiological activities of gastric motility and acid secretion will aid in the planning of future space flights, since aberrations in these activities could affect the performance of astronauts. Investigation of these activities requires monitoring of the pressure and pH in the stomach and titration of the gastric contents. Since previous methods and equipment used for performing these functions are inadequate for this investigation, the equipment whose design and operation are discussed in this thesis was developed. This equipment includes an ingestible sensor capsule which is tethered in the stomach, …
Investigation Of Thermal Resistance At The Interface Of Dissimilar And Similar Metals, Ching-Liang Lin
Investigation Of Thermal Resistance At The Interface Of Dissimilar And Similar Metals, Ching-Liang Lin
Masters Theses
"Experiments have been conducted to investigate the resistance and the effect of the directional heat flow at the interface of metals in contact. The test specimens were cylinders, axially aligned and dead weight loaded. Specimen materials were aluminum, bronze, and steel. The tests were conducted at environment pressures of 5x10⁻⁵ Torr. or less. The dead weight load was kept at 10 lbs. for all tests and the surface roughness for all specimens was from 6 to 8x10⁻⁶ inch. The results of the investigation reveal that the resistance to heat flow at the interface of metals decreases as the interface temperature …
Constant Horizontal Force Machining Through Flash Welded Steel Bars Of Varying Hardness, Donald Naeger
Constant Horizontal Force Machining Through Flash Welded Steel Bars Of Varying Hardness, Donald Naeger
Masters Theses
"The purpose of this experiment was to determine the effect of a constant horizontal force applied to the carriage of a lathe as it turned a piece of stock which consisted of two steel bars, of different hardness, flash welded together. This experiment was performed on a lathe to which a pulley system with a mechanical advantage of six was attached to the carriage. The strain on the tool was measured both in the horizontal and vertical directions by a tool dynamometer on which eight strain gages were mounted. The strain gages were calibrated on a Tinius-Olsen testing machine. The …
The Effect Of Prior Cold Work On The Pressure Welding Of Ferritic Nodular Iron, Ronald Morris Ledbetter
The Effect Of Prior Cold Work On The Pressure Welding Of Ferritic Nodular Iron, Ronald Morris Ledbetter
Masters Theses
"The purpose of this investigation was to determine the effect of prior cold work by swaging on the pressure welding of ferritic nodular iron. Test pressure welds were produced from continuously cast ferritic nodular iron in the as cast condition and with prior cold work of 20, 30, 40, and 50 per cent reductions in area. Welding pressures of 23,500 psi, 35,300 psi, and 47,100 psi were employed. All welds were made at interface temperatures of 2000°F. Welds made with the as cast material at high welding pressures possessed relatively low tensile strengths due to the creation of planes of …
Design And Construction Of A Liquid Nitrogen Cryostat For Use In A Swimming Pool Type Reactor, Bruce B. Joiner
Design And Construction Of A Liquid Nitrogen Cryostat For Use In A Swimming Pool Type Reactor, Bruce B. Joiner
Masters Theses
"The continued expansion of the nuclear reactor facility and the nuclear engineering program dictates the need that a liquid nitrogen cooled cryostat be available at the reactor. This unit would be available for use in graduate and undergraduate laboratories and for graduate research. A liquid nitrogen cooled cryostat capable of maintaining a sample between 77°K to 80°K for an extended period of time in or adjacent to the core of the reactor was designed, constructed, and successfully operated. Recommendations were made for possible modifications to expand the versatility of the system"--Abstract, page ii.
Analysis Of A Focus Log Electrode In A Non Homogeneous Medium, John Julian Zenor
Analysis Of A Focus Log Electrode In A Non Homogeneous Medium, John Julian Zenor
Doctoral Dissertations
"The mathematical model presented for the focused logging system is applicable to any resistance logging tool of the electrode type. Horizontal or cylindrical resistance interfaces may be included in any combinations. The tool and its environment are compartmentalized, and the integral form of the condition for continuity of current is applied to each compartment. Acceleration methods are applied to the iterative solution of the resulting large-scale system of linear equations. Two specific models are presented, one for the study of the effects of invasion and the other for the study of the effects of bed thickness on the apparent resistivity …
A Novel Method For Solving The Uniform Distributed Network Analysis Problem, Robert C. Peirson, Edward C. Bertnolli
A Novel Method For Solving The Uniform Distributed Network Analysis Problem, Robert C. Peirson, Edward C. Bertnolli
Electrical and Computer Engineering Faculty Research & Creative Works
An application of the Laplace transform method of Ogata to the solution of the uniform distributed network analysis problem is described. Copyright © 1968 by The Institute of Electrical and Electronics Engineers, Inc.
Recombination Statistics For Neutron Bombarded Silicon Transistors, M. C. Chow, J. L. Azarewiczt, C. A. Goben
Recombination Statistics For Neutron Bombarded Silicon Transistors, M. C. Chow, J. L. Azarewiczt, C. A. Goben
Electrical and Computer Engineering Faculty Research & Creative Works
This paper presents a recombination statistical model for the neutron-induced base current component reported previously. The derivation was based on the following: 1) the current equation for the induced current component developed previously; 2) the Shockley-Read-Hall statistics for holes and electrons; and 3) the recombination statistics derived by Sah, Noyce and Shockley for sites in the bulk space-charge region. The recombination statistics model depends on the diffusion potential, the junction voltage, the activation energy, temperature, and the ratio of capture cross-sections for holes and electrons. The utility of such a recombination statistical model is illustrated by using measured parameters to …
Radiation And Annealing Characteristics Of Neutron Bombarded Silicon Transistors, L. S. Su, G. E. Gassner, C. A. Goben
Radiation And Annealing Characteristics Of Neutron Bombarded Silicon Transistors, L. S. Su, G. E. Gassner, C. A. Goben
Electrical and Computer Engineering Faculty Research & Creative Works
Operating a silicon planar epitaxial transistor in the inverse configuration allows one to demonstrate clearly the importance of the neutron-induced base current component and its degradation of the emitter efficiency, and, because of the much larger depletion layer, to compute a volume dependent damage constant applicable to all silicon p-n junctions. The importance of minimizing the absolute change versus relative change in radiation hardening studies is clearly illustrated. Surface effects were found to be significant for transistors mounted in gas-filled cans. The diffusion potential was predicted, on theoretical grounds, to vary with neutron fluence, and the theory was experimentally confirmed. …
Prediction Of Drag Reduction With A Viscoelastic Model, Gary Kent Patterson, J. L. Zakin
Prediction Of Drag Reduction With A Viscoelastic Model, Gary Kent Patterson, J. L. Zakin
Chemical and Biochemical Engineering Faculty Research & Creative Works
No abstract provided.
Numerical Differentiation Of Equally Spaced And Not Equally Spaced Experimental Data [3], Harry C. Hershey, Jacques L. Zakin
Numerical Differentiation Of Equally Spaced And Not Equally Spaced Experimental Data [3], Harry C. Hershey, Jacques L. Zakin
Chemical and Biochemical Engineering Faculty Research & Creative Works
No abstract provided.
Electron-Impact Lonization Cross Section In Cesium, Kaare J. Nygaard
Electron-Impact Lonization Cross Section In Cesium, Kaare J. Nygaard
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
The total ionization due to the passage of an electron beam in cesium vapor has been measured with a Tate and Smith-type apparatus. The retarding potential difference method was used in the electron gun to obtain energy resolution better than 0.1 eV. The density of Cs atoms was determined from the Taylor and Langmuir formula and also measured with a surface-ionization detector. The two methods gave the same density to within ±3% when the apparatus was in thermodynamic equilibrium with the Cs reservoir. The cross section for production of Cs+ has been determined from threshold to 100 eV. For energies …
Interstitial Solute Trapping In Irradiated And Quenched Iron, M. (Manfred) Wuttig, J. T. Stanley, H. K. Birnbaum
Interstitial Solute Trapping In Irradiated And Quenched Iron, M. (Manfred) Wuttig, J. T. Stanley, H. K. Birnbaum
Materials Science and Engineering Faculty Research & Creative Works
The interaction of interstitial carbon and nitrogen solutes with defects produced by low temperature neutron irradiation and by quenching was studied in high purity and Ferrovac E iron. Magnetic Dis accommodation techniques were applied to determine the interstitial solute content after irradiation and upon annealing. Doses of about 1017 neutrons/cm2 caused the trapping of about 20 ppm (atomic) interstitial solutes at 65 (carbon) and 40°C (nitrogen). Trapping of carbon in a Ferrovac E iron alloy occurred during a fast quench from 880°C. After trapping, the interstitial solutes reappeared in solid solution at 300 (carbon, neutron irradiation), 200 (nitrogen, neutron irradiation), …
Cutting Nbs Budget, Norbert J. Kreidl
Cutting Nbs Budget, Norbert J. Kreidl
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
Current Density-Anodic Potential Curves Of Single Crystal Gaas At Low Currents In Koh, Martin E. Straumanis, J. P. Krumme, William Joseph James
Current Density-Anodic Potential Curves Of Single Crystal Gaas At Low Currents In Koh, Martin E. Straumanis, J. P. Krumme, William Joseph James
Materials Science and Engineering Faculty Research & Creative Works
Single p-type, GaAs crystals of high purity, Zn doped, were used to determine whether or not the inverse octahedral {111} faces show potential differences and various rates of anodic dissolution. The Ga{111}, As{111}, {110}, and {100} faces, were polished, etched, and etch-polished with concentrated H2SO4 + H2O2, and immersed in IN KOH. The Ga{111} faces were found to be the most noble with respect to rest and anodic dissolution potentials. The potential difference between the inverse {111} faces was as large as 0.14v for the rest and 0.123v for the dissolution potentials. The …
Zener Disaccommodation In Dilute F.C.C. Co-Ti Alloys, H. B. Aaron, M. (Manfred) Wuttig, H. K. Birnbaum
Zener Disaccommodation In Dilute F.C.C. Co-Ti Alloys, H. B. Aaron, M. (Manfred) Wuttig, H. K. Birnbaum
Materials Science and Engineering Faculty Research & Creative Works
The magnetic Dis accommodation, i.e., the time dependence of the low field magnetic permeability, was investigated in cobalt base alloys containing 0-5.1 at.% (0-4.2 wt.%) titanium in the temperature range 400-700°C. A strong temperature dependence of the Dis accommodation observed in the range 430-530°C could be accounted for predominantly by a single first order relaxation process. Analyzing the data in terms of (a) a single exponential relaxation, (b) a lognormal distribution of relaxation times, and (c) a sum of exponential relaxations, it was shown that the relaxation strength varies as the square of the titanium concentration and that the relaxation …
Age Hardening In A Mg-9 Wt.% Al Alloy, J. Beverley Clark
Age Hardening In A Mg-9 Wt.% Al Alloy, J. Beverley Clark
Materials Science and Engineering Faculty Research & Creative Works
The precipitation process and age hardening mechanism in a Mg-9 wt.% Al alloy were studied principally by transmission electron microscopy. This alloy age hardens by the general precipitation of plates of the equilibrium Mg17Al12 phase on the basal plane of the magnesium solid solution matrix. No evidence for the formation of either G.P. zones or a transition lattice of the Mg17Al12 precipitate was obtained. Cellular precipitation occurs competitively with the general precipitation at nearly all age hardening temperatures. In the solution treated condition, basal slip and {101̄2} twins are the principal deformation modes. Precipitation …
A Metallographic Study Of Solidification And Segregation In Cast Aluminum-Uranium Alloys, Bruce L. Bramfitt, Hollis P. Leighly
A Metallographic Study Of Solidification And Segregation In Cast Aluminum-Uranium Alloys, Bruce L. Bramfitt, Hollis P. Leighly
Materials Science and Engineering Faculty Research & Creative Works
The micromorphology and type of segregation in vacuum-cast ingots of aluminum-uranium alloys, ranging from 5 to 30 weight percent, were studied. The microstructural characteristics are similar to those of aluminum-silicon alloys of the same composition range, except that the aluminum-uranium eutectic was identified as having "chevron" and "rhombic spiral" types of morphology. © 1968.
Dielectric Properties Of Solid Solutions Of Bifeo₃ With Pb(Ti, Zr)O₃ At High Temperature And High Frequency, Robert Travis Smith, Gary D. Achenbach, Robert Gerson, William Joseph James
Dielectric Properties Of Solid Solutions Of Bifeo₃ With Pb(Ti, Zr)O₃ At High Temperature And High Frequency, Robert Travis Smith, Gary D. Achenbach, Robert Gerson, William Joseph James
Physics Faculty Research & Creative Works
Solid solutions of BiFeO3 with PbTiO3, PbTi0.5Zr0.5O3, and PbZrO3 were prepared. The crystallographic data on these solutions, which are basically perovskitic, are given. The dielectric constants of the materials were determined at a frequency of 0.53 GHz and at temperatures up to 800°C. Dielectric Curie points were found in solutions containing up to 90 mole % BiFeO3. These results leave little doubt that BiFeO3 is ferroelectric or antiferroelectric. The extrapolated Curie point for BiFeO3 is above 850°C. BiFeO3 appears more likely to be ferroelectric than …
The Critical And High‐Temperature Behavior Of A Heisenberg Ferromagnet, Harry A. Brown
The Critical And High‐Temperature Behavior Of A Heisenberg Ferromagnet, Harry A. Brown
Physics Faculty Research & Creative Works
No abstract provided.
The Magnetic Dilution Problem, Harry A. Brown, William F. Parks
The Magnetic Dilution Problem, Harry A. Brown, William F. Parks
Physics Faculty Research & Creative Works
No abstract provided.
Cell Model Of A Fluid. I. Evaluation Of The Partition Function And Series Expansions, Ralph G. Tross, Louis H. Lund
Cell Model Of A Fluid. I. Evaluation Of The Partition Function And Series Expansions, Ralph G. Tross, Louis H. Lund
Physics Faculty Research & Creative Works
The partition function of a one-dimensional system of particles with all interactions active is formulated in terms of Ising ferromagnetic spin states. It is shown how the partition function for two- and three-dimensional systems can be obtained from the one-dimensional one by restricting the number of bonds per particle. After writing the partition function in matrix form, the operator of interest is diagonalized and its trace expressed in the form of a convenient infinite series. The series is shown to be absolutely convergent and its analytic properties are briefly investigated. It is then applied to one-, two-, and three-dimensional systems …
Cell Model Of A Fluid. Ii. Thermodynamic Properties Of The System, Ralph G. Tross, Louis H. Lund
Cell Model Of A Fluid. Ii. Thermodynamic Properties Of The System, Ralph G. Tross, Louis H. Lund
Physics Faculty Research & Creative Works
In Paper I of this series (preceding paper) the model was formulated mathematically, and the solution derived in the form of an infinite series. The convergence and analyticity of the solution were investigated. It was then applied to one-, two-, and three-dimensional systems with nearest-neighbor interactions, and low-temperature series for these systems were obtained. In the present article the thermodynamics of the model are investigated. The series solution of the partition function derived in Paper I is applied to systems with interaction potentials of increasing complexity. The validity of the model is established by showing that in the appropriate limits …
The Bethe-Weizsäcker Mass Formula And Lennard-Jones N-N Potentials, James Paul Wesley, Alex E.S. Green
The Bethe-Weizsäcker Mass Formula And Lennard-Jones N-N Potentials, James Paul Wesley, Alex E.S. Green
Physics Faculty Research & Creative Works
An elementary derivation of the Bethe-Weizscker semiempirical nuclear mass formula which is in the spirit of current views of nuclear structure, is given. Lennard-Jones potentials are assumed to act between nuclear. Thus, the major interaction between nn, pp, and np pairs is taken of the form —g/r3+h/r4, where r is the separation distance between nuclear, and g and h are constants. An additional "symmetry" interaction of the form s/r3 is assumed for np pairs. Summing the potential energy over all nucleon pairs and using the Fermi statistical estimate of the kinetic energy, the Bethe-Weizscker semiempirical mass formula is obtained directly. …
A Direct Method Of Measuring Stray Load Loss In Dc Machines, Kanaiyalal R. Shah, George Mcpherson
A Direct Method Of Measuring Stray Load Loss In Dc Machines, Kanaiyalal R. Shah, George Mcpherson
Electrical and Computer Engineering Faculty Research & Creative Works
Stray load loss in dc machines is denned as the difference between the actual loss under load and the well-recognized loss. This paper describes a simple, reliable, and direct method of measuring this loss by means of a proposed short-circuit test with a correction factor for uncompensated-type dc machines. It also describes the sources and components of stray load losses as they occur under short-circuit test. Copyright © 1968 by The Institute of Electrical and Electronics Engineers, Inc.
A Simple Design Algorithm For Synthesis Of Multilevel Combinational Networks, James H. Tracey
A Simple Design Algorithm For Synthesis Of Multilevel Combinational Networks, James H. Tracey
Electrical and Computer Engineering Faculty Research & Creative Works
An algorithm is presented for the synthesis of combinational networks with a constrained arrangement of ANDS, ORS, NANDS, NORS, and inverters. The algorithm is easily presented to students in an introductory logic design course and has considerable application in modern practical logic design. Many texts available for a first course in logic design give very limited practical guidance for synthesis of networks under constraints outlined here. It is suggested that the algorithm presented here be furnished as supplementary material in the introductory course. Copyright © 1968 by The Institute of Electrical and Electronics Engineers, Inc.
Neutron Radiation Damage In Silicon Transistors, C. A. Goben, F. M. Smits, J. L. Wirth
Neutron Radiation Damage In Silicon Transistors, C. A. Goben, F. M. Smits, J. L. Wirth
Electrical and Computer Engineering Faculty Research & Creative Works
In the investigation of base and collector current as a function of the emitter-to-base voltage, previous studies have shown that neutron-induced base current has components originating in the emitter space charge region as well as the neutral base region. This study shows that while the low injection level neutron-induced base current is dominated by the space charge component, the high injection behavior appears to be controlled by recombination in the neutral base region. Additional experiments performed in special tetrode transistors and van der Pauw-type samples indicate that changes in collector current are dominated by recombination in the neutral base, while …