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Articles 16411 - 16440 of 17246
Full-Text Articles in Entire DC Network
Mass Transfer From Spherical Gas Bubbles And Liquid Droplets Moving Through Power-Law Fluids In The Laminar Flow Regime, Robert M. Wellek, Cheng Chun Huang
Mass Transfer From Spherical Gas Bubbles And Liquid Droplets Moving Through Power-Law Fluids In The Laminar Flow Regime, Robert M. Wellek, Cheng Chun Huang
Chemical and Biochemical Engineering Faculty Research & Creative Works
Calculated mass transfer coefficients for the continuous phase are presented for internally circulating spheres of a Newtonian fluid traveling through a power-law-type continuous phase in the so-called creeping-flow region. The Nakano and Tien stream functions allow the Sherwood number to be computed as a function of the Peclet number, power-law index, and a viscosity ratio parameter. The Hirose and Moo-Young relation is shown to be a limiting case of this numerical solution. Mass transfer rates increase as the fluids become more pseudoplastic and/or the continuous phase consistency index increases, all other factors held constant. © 1970, American Chemical Society. All …
Effects Of Cold Work In Cold-Formed Steel Structural Members, S. J. Britvec, Alexander Chajes, K. W. Warren, Jairo Uribe, George Winter
Effects Of Cold Work In Cold-Formed Steel Structural Members, S. J. Britvec, Alexander Chajes, K. W. Warren, Jairo Uribe, George Winter
CCFSS Library (1939 - present)
No abstract provided.
Some Effects Of Oh Groups On Sodium Silicate Glasses, Mokhtar Sayed Maklad
Some Effects Of Oh Groups On Sodium Silicate Glasses, Mokhtar Sayed Maklad
Doctoral Dissertations
"Glasses of various compositions in the Na₂O-SiO₂ system were prepared with different levels of OH concentration. Phase separation kinetics, thermal expansion, radiation induced optical absorption, and internal friction of these glasses were studied. The increase in OH content in these glasses was found to (a) enhance the rate of phase separation; (b) increase thermal expansion above the glass temperature and change the dilatometric softening temperature in a way that depends on microstructure; (c) increase the radiation induced optical absorption bands associated with positive hole centers and decrease those associated with electron trap centers; and, (d) decrease the low temperature alkali …
Extension Of Some Theorems Of Complex Functional Analysis To Linear Spaces Over The Quaternions And Cayley Numbers, James E. Jamison
Extension Of Some Theorems Of Complex Functional Analysis To Linear Spaces Over The Quaternions And Cayley Numbers, James E. Jamison
Doctoral Dissertations
"In this work certain aspects of Functional Analysis are considered in the setting of linear spaces over the division rings of the real Quaternions and the real Cayley algebra. The basic structure of Banach spaces over these division rings and the rings of bounded operators on these spaces is developed. Examples of finite and infinite dimensional spaces over these division rings are given. Questions concerning linear functionals, the Hahn-Banach Theorem and Reflexivity are considered. The Stone-Weierstrass Theorem is proven for functions with values in a real Cayley Dickson algebra of dimension n. The concepts of inner product spaces and Hilbert …
Model-Referenced Adaptive Control Of Plants With Noise And Inaccessible State Vector, Donald James Schooley
Model-Referenced Adaptive Control Of Plants With Noise And Inaccessible State Vector, Donald James Schooley
Doctoral Dissertations
"The problems of process noise, measurement noise, and inaccessible process state vector in the model-referenced system of Shackcloth-Butchart-Parks (SBP) are investigated. Since the system no longer possesses a static equilibrium point, the concept of asymptotic stability does not apply. However, by using Liapunov-like ideas, the error between the plant (process plus controller) and the model is shown to enter a region about the origin if certain bounds are known. A possible technique for reducing the size of this region is to feedback a function of the error into the plant's input. Several methods of circumventing the inaccessible state vector problem …
Probe Detection Of Microwave Perturbation In A Magnetoplasma, Show-Ran Peter Wang
Probe Detection Of Microwave Perturbation In A Magnetoplasma, Show-Ran Peter Wang
Masters Theses
"When a microwave signal with a frequency near the electron upper hybrid resonance is applied to a magnetoplasma, it will excite the plasma. The perturbation of plasma can be detected by using Langmuir probes. The particular plasma used in this experiment is an argon discharge type and the density is relatively low (n~10⁸ cm⁻³). The electron temperature is about 7000º K. Because a magnetic field is applied to the plasma, it is necessary to use the probe theory in a magnetic field to calculate the electron number density from the electron temperature. In order to determine the electron upper hybrid …
The Anodic Oxidation Of Oxalic Acid On Au, Jean Louis Lucien Desmartin
The Anodic Oxidation Of Oxalic Acid On Au, Jean Louis Lucien Desmartin
Masters Theses
"The anodic oxidation of oxalic acid on Au has been studied at 25ºC in aqueous media. The reaction rate was measured as a function of potential, oxalic acid concentration, pH, and temperature in H₂SO₄-K₂SO₄ solutions. A change in the Tafel slope in going from the lower to the higher Tafel region is explained by an alteration of the reaction mechanism due to electrical interactions between adsorbed species and the anode. Further details of an oxidation sequence involving resonant forms of oxalic acid are proposed"--Abstract, page 1.
Time-Domain Analysis And Measurement Techniques For Distributed Rc Structures. Ii. Impulse Measurement Techniques, Robert C. Peirson, Edward C. Bertnolli
Time-Domain Analysis And Measurement Techniques For Distributed Rc Structures. Ii. Impulse Measurement Techniques, Robert C. Peirson, Edward C. Bertnolli
Electrical and Computer Engineering Faculty Research & Creative Works
Transient analysis for uniform RC structures is considered in this paper. A method is presented for determining the parameters of such structures. The measurements are obtained using impulse excitations in open-circuit and short-circuit configurations. The theoretical results obtained predict fairly the experimental results. © 1969 The American Institute of Physics.
Infrared Reflectivity Of Doped Insb And Cds, Thomas J. Mcmahon, Robert John Bell
Infrared Reflectivity Of Doped Insb And Cds, Thomas J. Mcmahon, Robert John Bell
Physics Faculty Research & Creative Works
The coupling of free carriers and lattice-vibrational modes in CdS and InSb was investigated by using reflectance measurements. When the free-carrier concentration is such that the longitudinal-optical-mode frequency is at or near the plasma frequency, the longitudinal mode takes on a mixed character and is shifted in a manner similar to that described by Varga in 1965, while the transverse mode remains fixed. The electron effective masses in such a situation can be determined with the lattice effects excluded. In the case of CdS, the polaron mass and additional absorption in the plasma mode above the longitudinal-optical phonon frequency must …
Entropy Of The Mixed State Of Some Low-Κ Type-Ii Superconductors, Don Carlos Hopkins, R. R. Rice, J. M. Carter, J. D. Hayes
Entropy Of The Mixed State Of Some Low-Κ Type-Ii Superconductors, Don Carlos Hopkins, R. R. Rice, J. M. Carter, J. D. Hayes
Physics Faculty Research & Creative Works
The entropy of the mixed state of type-II superconductors with low κ(∼1) is studied for the alloys Pb0.96Tl0.04 and In0.88Sn0.12. The current theories are reviewed for approximations valid near Hc1 and near Hc2. The experiments show for the most reversible sample (Pb0.96Tl0.04) that (SB)T of the mixed state depends only on temperature, and that (ST)B increases linearly with B from its value for the superconducting state until it drops discontinuously to its normal state value at Hc2. There is no abrupt increase in the specific …
Cation Grain-Boundary Diffusion In Sodium Chloride, K. R. Riggs, Manfred Wuttig
Cation Grain-Boundary Diffusion In Sodium Chloride, K. R. Riggs, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
No abstract provided.
A Heavy-Ion Energy Loss Spectrometer, John T. Park, F. D. Schowengerdt
A Heavy-Ion Energy Loss Spectrometer, John T. Park, F. D. Schowengerdt
Physics Faculty Research & Creative Works
A high-resolution system for the measurement of the energy loss spectra of 20-250 keV heavy ions incident on gas targets is described. The high resolution is obtained by decelerating the ion beam to a low, well-defined energy before performing the energy analysis. The energy loss spectrum is determined by changing the accelerator energy to compensate for energy lost in collisions with the gas atoms. The system is arranged so that normal fluctuations in the accelerator's power supply do not affect the energy resolution. The resolving power of the system is 2.5x104. The primary proton beam has a detected WHM of …
Formation Of Carbides On Tungsten Wires, W. J. Croft, Kaare J. Nygaard
Formation Of Carbides On Tungsten Wires, W. J. Croft, Kaare J. Nygaard
Physics Faculty Research & Creative Works
It has been found that layers of tungsten carbide form on tungsten wires processed under ultra-high vacuum. The carbide is formed from carbon impurities in the volume of material.
Some New Approaches To Shallow Impurity States, Wayne E. Tefft, Robert John Bell, Harold V. Romero
Some New Approaches To Shallow Impurity States, Wayne E. Tefft, Robert John Bell, Harold V. Romero
Physics Faculty Research & Creative Works
A variational calculation of shallow surface impurity states including image-charge and anisotropic mass effects was performed using two different sets of orthogonal functions. The first set was obtained by varying the Bohr radius in the hydrogenic functions, separately for each state. In the second set the Bohr radius was allowed to become anisotropic, and the elements were separately treated as variational parameters. In each case it was shown that with certain restrictions on the variational parameters the set remained complete and orthogonal. General expressions for the energy eigenvalues for both the bulk and surface problem obtained from the first set …
Charge-Transfer Cross Sections For Negative Ions On Atomic And Molecular Targets, W. (William) R. Snow, R. D. Rundel, R. Geballe
Charge-Transfer Cross Sections For Negative Ions On Atomic And Molecular Targets, W. (William) R. Snow, R. D. Rundel, R. Geballe
Physics Faculty Research & Creative Works
Charge-transfer cross sections for H- on O, O2, and NO2; O- on H, O, H2, O2, and NO2; and C- on H and O have been measured over an energy range of 0.5 to 4 keV using a modulated crossed-beam apparatus. The experimental cross sections are compared with theories of resonant and non-resonant charge transfer based on a two-state approximation. For the reactions H-+O O-+H, the cross sections are found to be consistent with detailed balancing. The effect of electron detachment on charge-transfer …
Heavy-Particle Energy-Loss Spectrometry: Inelastic Cross Sections For Protons Incident Upon Helium, John T. Park, F. D. Schowengerdt
Heavy-Particle Energy-Loss Spectrometry: Inelastic Cross Sections For Protons Incident Upon Helium, John T. Park, F. D. Schowengerdt
Physics Faculty Research & Creative Works
A method is described whereby absolute cross sections are obtained from inelastic energy-loss spectra induced by ions incident upon gaseous targets at energies of 25-125 keV. Inelastic energy-loss spectra of helium for proton impact are presented. Apparent differential cross sections and absolute total cross sections are obtained from the spectra. Total cross sections for the sum of the 1S1→2S1 and 1S1→2P1 excitations are reported, along with estimates of the relative contributions of each. Total ionization cross sections, total cross sections for inelastic scattering, apparent energy distributions of ejected electrons, and partial ionic stopping powers are also reported. The excitation cross …
The Missouri Miner, November 05, 1969
The Missouri Miner, November 05, 1969
The Missouri Miner Newspaper
No abstract provided.
Mössbauer Effect In The Ferroelectric Pbtio₃-Bifeo₃ Solid Solutions, C. M. Yagnik, James P. Canner, Robert Gerson, William Joseph James
Mössbauer Effect In The Ferroelectric Pbtio₃-Bifeo₃ Solid Solutions, C. M. Yagnik, James P. Canner, Robert Gerson, William Joseph James
Physics Faculty Research & Creative Works
The Mössbauer spectra of the system (PbTiO3)0.95(BiFeO3)0.05 have been studied from room temperature to 585°C. From the isomer-shift of 0.491±0.02 mmsec-1 at room temperature, the ionicity is found to be 60% ± 20%. A discontinuity in the plot of isomer-shift versus temperature at Tc is observed. The quadrupole splitting at room temperature is 0.295 ± 0.02 mm/sec-1. A dip in the Mössbauer fraction is observed at the Curie temperature.
The Missouri Miner, October 29, 1969
The Missouri Miner, October 29, 1969
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, October 22, 1969
The Missouri Miner, October 22, 1969
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, October 08, 1969
The Missouri Miner, October 08, 1969
The Missouri Miner Newspaper
No abstract provided.
A Liquid Extraction Column With Reciprocated Wire Mesh Packing, Robert M. Wellek, M. Uran Ozsoy, J. J. Carr, Dudley Thompson, Thomas V. Konkle
A Liquid Extraction Column With Reciprocated Wire Mesh Packing, Robert M. Wellek, M. Uran Ozsoy, J. J. Carr, Dudley Thompson, Thomas V. Konkle
Chemical and Biochemical Engineering Faculty Research & Creative Works
In a new type of pulsating, liquid extractor, pulsating energy is added to the counter currently flowing liquid streams by a stainless-steel wire mesh packing which is reciprocated vertically in a 3-inch i.d. extraction column. The mass transfer performance and flooding characteristics are studied as a function of the frequency and amplitude of reciprocation, the total solvent and feed throughputs, and choice of phase dispersion. The benzene-HAc-H2O and MIBK-HAcH2O systems were used. Extraction data for the benzene system were correlated in terms of a dimensionless pulse velocity group. Operating throughputs are significantly higher than those achieved …
Front Matter, University Of Missouri--Rolla
Front Matter, University Of Missouri--Rolla
Symposia on Turbulence in Liquids
No abstract provided.
The Oxidative Decarboxylation Of Polyaminocarboxylic Acids - I. A Study Of The Reaction Of Ethylenedinitrilotetraacetic Acid (Edta) With Cerium (Iv) In Acid Solution, Samir B. Hanna, S. Al-Hashimi, William H. Webb, William R. Carroll
The Oxidative Decarboxylation Of Polyaminocarboxylic Acids - I. A Study Of The Reaction Of Ethylenedinitrilotetraacetic Acid (Edta) With Cerium (Iv) In Acid Solution, Samir B. Hanna, S. Al-Hashimi, William H. Webb, William R. Carroll
Chemistry Faculty Research & Creative Works
The reaction between Ce(IV) and EDTA was followed titrimetrically and spectrophotometrically and was found to occur in stages. Four equivalents of Ce(IV) are reduced per mole of EDTA almost instantaneously at room temperature. With increasing temperature and reaction time an ultimate of about 14 equivalents of Ce (IV) is consumed per mole of EDTA. Carbon dioxide, formaldehyde, and other yet unidentified compounds are the products of oxidation of EDTA. The kinetics of the reaction in aqueous sulfuric acid was studied over the temperature range 11.7°-40°C by a spectrophotometric technique. The effects of the acidity of the medium and of added …
Diffusion Coefficients Of D-Glucose In Aqueous Carboxymethylcellulose And Carboxypolymethylene Solutions, A. L. Huang, S. V. Desai, Robert M. Wellek
Diffusion Coefficients Of D-Glucose In Aqueous Carboxymethylcellulose And Carboxypolymethylene Solutions, A. L. Huang, S. V. Desai, Robert M. Wellek
Chemical and Biochemical Engineering Faculty Research & Creative Works
A micro interferometric method was used to determine pseudo-binary, molecular diffusion coefficients for diffusion of D-glucose in aqueous carboxymethylcellulose (CMC) and aqueous carboxypolymethylene (Carbopol) solutions. An initial solute concentration of about 9 wt. % D-glucose in the aqueous polymer solutions was used. The polymer concentrations for the CMC solutions ranged from 1.2 to 2.2 wt. % and for the Carbopol solutions from 0.18 to 0.28 wt. %. Diffusion coefficients were determined as a function of reduced solute concentration, both with and without the effect of solution volume change during diffusion being considered. © 1969, American Chemical Society. All rights reserved.
Missouri S&T Magazine, June 1969, Miner Alumni Association
Missouri S&T Magazine, June 1969, Miner Alumni Association
Missouri S&T Magazine
No abstract provided.
Clean Air, Kenneth W. Nelson
Radon Daughters And Their Control, R. G. Beverly
Radon Daughters And Their Control, R. G. Beverly
Mining Environmental Conference
No abstract provided.
The Missouri Miner, April 16, 1969
Operation Green Earth, Alten Grandt
Operation Green Earth, Alten Grandt
Mining Environmental Conference
No abstract provided.