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Articles 23641 - 23670 of 33650
Full-Text Articles in Entire DC Network
A Comparison Of Finite Element Nonlinear Analyses With Tests Of Stressed Arch Frames, Murray J. Clarke, Gregory J. Hancock
A Comparison Of Finite Element Nonlinear Analyses With Tests Of Stressed Arch Frames, Murray J. Clarke, Gregory J. Hancock
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Current Research On Cold-Formed Steel Structures, George E. Blandford
Current Research On Cold-Formed Steel Structures, George E. Blandford
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Center For Cold-Formed Steel Structures, Albert L. Johnson
Center For Cold-Formed Steel Structures, Albert L. Johnson
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
New Czechoslovak Standard For Cold-Formed Steel Structures, Jiri Studnicka
New Czechoslovak Standard For Cold-Formed Steel Structures, Jiri Studnicka
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
The Missouri Miner, October 17, 1990
The Missouri Miner, October 17, 1990
The Missouri Miner Newspaper
No abstract provided.
Theoretical Description Of The Binary Peak In Clothed Ion-Atom Collisions, C. O. Reinhold, Ronald E. Olson
Theoretical Description Of The Binary Peak In Clothed Ion-Atom Collisions, C. O. Reinhold, Ronald E. Olson
Physics Faculty Research & Creative Works
The impulse or binary encounter approximation for ion-atom collisions is extended to treat the non-Coulomb interaction between a clothed projectile ion and the target electrons. This model is shown to reproduce the unexplained enhancement of the zero-degree binary peak for partially stripped ions over that for Equi velocity fully stripped ions that has recently been observed experimentally in Fq++H2, He collisions. Very good agreement is obtained between theory and experiment and, furthermore, this model is used to illuminate the underlying dynamics which leads to the observed enhancement. © 1990 IOP Publishing Ltd.
The Missouri Miner, October 10, 1990
The Missouri Miner, October 10, 1990
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, October 03, 1990
The Missouri Miner, October 03, 1990
The Missouri Miner Newspaper
No abstract provided.
Angular Distribution Of Auger Electrons Emitted Through The Resonant Transfer And Excitation Process Following O⁵⁺+He Collisions, Malika Benhenni, Stephen M. Shafroth, J. K. Swenson, Michael Schulz, J. P. Giese, Harald Schone, Charles Randy Vane, Peter F. Dittner, Sheldon Datz
Angular Distribution Of Auger Electrons Emitted Through The Resonant Transfer And Excitation Process Following O⁵⁺+He Collisions, Malika Benhenni, Stephen M. Shafroth, J. K. Swenson, Michael Schulz, J. P. Giese, Harald Schone, Charles Randy Vane, Peter F. Dittner, Sheldon Datz
Physics Faculty Research & Creative Works
This Letter reports the first measurements of the angular distribution of Auger electrons emitted from the decay of the (1s2s2p2)3D O4+** doubly excited state formed predominantly through resonant transfer and excitation (RTE) in collisions of 13-MeV O5+ projectiles with He. The (1s2s2p2)3D angular distribution is strongly peaked along the beam direction, in agreement with recent calculations of the RTE angle-dependent impulse approximation. Furthermore, interference effects between the RTE and the elastic target direct-ionization channels are observed.
The Missouri Miner, September 26, 1990
The Missouri Miner, September 26, 1990
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, September 19, 1990
The Missouri Miner, September 19, 1990
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, September 12, 1990
The Missouri Miner, September 12, 1990
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, September 05, 1990
The Missouri Miner, September 05, 1990
The Missouri Miner Newspaper
No abstract provided.
Optimized Cross Correlation Waveforms For First Order Correlation Loops, Kurt Louis Kosbar
Optimized Cross Correlation Waveforms For First Order Correlation Loops, Kurt Louis Kosbar
Electrical and Computer Engineering Faculty Research & Creative Works
In this work, the steady state mean square tracking error of first order correlation loops is minimized by varying the locally generated cross correlation function produced by the voltage controlled oscillator. This analysis should assist in the design of modified first order delay locked loops used for pseudonoise code synchronization in direct sequence spread spectrum receivers. The optimum cross correlation waveform is generated by filtering a replica of the originally transmitted signal. The optimal filter imposes a 90 degree phase shift at all frequencies and has an amplitude response that is a function of the channel signal to noise ratio. …
Evidence For A Crossover From Multiple Trapping To Percolation In The High-Temperature Electrical Conductivity Of Mn-Doped Lacroo₃, Ryne P. Raffaelle, Harlan U. Anderson, Don M. Sparlin, Paul Ernest Parris
Evidence For A Crossover From Multiple Trapping To Percolation In The High-Temperature Electrical Conductivity Of Mn-Doped Lacroo₃, Ryne P. Raffaelle, Harlan U. Anderson, Don M. Sparlin, Paul Ernest Parris
Materials Science and Engineering Faculty Research & Creative Works
We explain the deep electrical conductivity minimum near x=0.05 in the perovskite-type ceramic LaCr1-xMnxO3 as a crossover between two different regimes of hopping conduction. At low Mn concentrations the diffusion of small polarons among Cr ions is limited by multiple trapping at energetically lower Mn sites. At higher concentrations a percolating path of Mn sites forms and direct transport between Mn ions dominates the conduction process.
The Missouri Miner, August 29, 1990
The Missouri Miner, August 29, 1990
The Missouri Miner Newspaper
No abstract provided.
The Missouri Miner, August 22, 1990
The Missouri Miner, August 22, 1990
The Missouri Miner Newspaper
No abstract provided.
Method For Fabricating Or Modifying An Article Comprising The Removal Of A Polymer Coating, Bonnie Bachman, Elizabeth A. Hofstatter, Joan M. Ritter, Jerry J. Rubin
Method For Fabricating Or Modifying An Article Comprising The Removal Of A Polymer Coating, Bonnie Bachman, Elizabeth A. Hofstatter, Joan M. Ritter, Jerry J. Rubin
Economics Faculty Research & Creative Works
Disclosed is a method for removing poly-para-xylylene, its derivatives, and copolymers (collectively called "parylene") from bodies, including relatively large bodies such as printed circuit (PC) boards, that is capable of yielding relatively high removal rates. A body such as a PC board coated with parylene is placed into a reaction chamber downstream from a microwave plasma such that plasma discharge products generated by the microwave plasma react with the parylene, etching the parylene without exposing the body to bombardment by energetic ions and/or electrons. The plasma is generated from a gas mixture containing oxygen, a second gas, and optional additives …
Recent Applications Of Glass Science, Norbert J. Kreidl
Recent Applications Of Glass Science, Norbert J. Kreidl
Materials Science and Engineering Faculty Research & Creative Works
Recent, often exciting, applications of glass science include solid state batteries, electronic switches and memories, electrophotography, solar cells, microspheres for optical strengthening and medical uses, novel glass ceramics such as machinable and bioactive materials, solder glasses, composites, sol-gel glasses, gradient index optics, communication fibers, sensors, non-linear and active optics, and, perhaps, digital optics. The large field of special coatings is not covered in this review. © 1990.
Robot Pedagogics: The Adaptation, Analysis, And Computer Control Of A Model Manipulator, Edward T. Hammerand, Chung You Ho
Robot Pedagogics: The Adaptation, Analysis, And Computer Control Of A Model Manipulator, Edward T. Hammerand, Chung You Ho
Computer Science Technical Reports
The subject of robotics is addressed by many different fields, among them computer science, electrical engineering, and mechanical engineering. This work is an attempt to bring together all of these aspects from the perspective of a computer science background. Different techniques are considered and reconciled with one another in the analytical area, while detail and explanation are added in all areas that were not previously available. In addition, geometrical interpretations arc presented for concepts that have heretofore been presented only in the form of equations.
Ccfss News August 1990, Wei-Wen Yu Center For Cold-Formed Steel Structures
Ccfss News August 1990, Wei-Wen Yu Center For Cold-Formed Steel Structures
CCFSS Newsletters (1999 - 2008)
No abstract provided.
Load And Resistance Factor Design Of Cold-Formed Steel Reliability Based Criteria For Cold-Formed Steel Members, Ling-En Hsiao, Wei-Wen Yu, Theodore V. Galambos
Load And Resistance Factor Design Of Cold-Formed Steel Reliability Based Criteria For Cold-Formed Steel Members, Ling-En Hsiao, Wei-Wen Yu, Theodore V. Galambos
CCFSS Library (1939 - present)
In the design of steel buildings, the "Allowable Stress Design (ASD)" method has long been used for cold-formed steel structural members in the United States and other countries. In this approach, member forces, or moments, determined on the basis of working loads should not exceed the allowable values. The allowable value is used to prevent the possible structural failure by using an appropriate factor of safety selected primarily on the basis of engineering judgment and long-time experience. Recently, in the United States, the concepts of risk and reliability analysis have been successfully applied to the Load and Resistance Factor Design …
Double Excitation Of He By Fast Ions, J. P. Giese, Michael Schulz, J. K. Swenson, Harald Schone, Malika Benhenni, S. L. Varghese, Charles Randy Vane, Peter F. Dittner, Stephen M. Shafroth, Sheldon Datz
Double Excitation Of He By Fast Ions, J. P. Giese, Michael Schulz, J. K. Swenson, Harald Schone, Malika Benhenni, S. L. Varghese, Charles Randy Vane, Peter F. Dittner, Stephen M. Shafroth, Sheldon Datz
Physics Faculty Research & Creative Works
Autoionization of He atoms following double excitation by electrons, protons, CQ+ (Q=4-6), and FQ+ (Q=7-9) ions has been studied. The electron-emission yields from the doubly excited 2s2(1S), 2s2p(1P), and 2p2(1P) states were measured at the reduced projectile energy of 1.5 MeV/nucleon for observation angles between 10°and 60°. The results indicate excitation to the 2s2(1S) and 2p2(1D) states increases as approximately Q3, while excitation to the 2s2p(1P) state varies as approximately Q2, where Q is …
Missouri S&T Magazine, August 1990, Miner Alumni Association
Missouri S&T Magazine, August 1990, Miner Alumni Association
Missouri S&T Magazine
No abstract provided.
A Knowledge-Based Expert System For Managing Underground Coal Mines In The U.S., H. Singh, S. Yuan, C. M. Watts, J. M. Dean, N. P. Reddy, R. S. Nutter Jr., R. Larry Grayson
A Knowledge-Based Expert System For Managing Underground Coal Mines In The U.S., H. Singh, S. Yuan, C. M. Watts, J. M. Dean, N. P. Reddy, R. S. Nutter Jr., R. Larry Grayson
Mining Engineering Faculty Research & Creative Works
The Mine Management Support System which is being developed as a knowledge-based expert system for better management of underground coal mines, is presented. Concentrating on capturing the complex body of knowledge needed to enhance efficient management of a mine, it will encompass information and preferred rules on work scheduling, work practices, regulations impinging on the accomplishment of work, responses to operating problems, and the labor-management work agreement. Different components of the mine system, modeled using an object-oriented layering technique, are displayed graphically to aid in coordinating work plans and to present locations of equipment, supplies, and proposed subsystem components.
Observation Of Velocity-Tuned Multiphoton Doppleron Resonances In Laser-Cooled Atoms, Jeffrey J. Tollett, Jian Chen, J. Greg Story, N. W M Ritchie, Curtis C. Bradley, Randall G. Hulet
Observation Of Velocity-Tuned Multiphoton Doppleron Resonances In Laser-Cooled Atoms, Jeffrey J. Tollett, Jian Chen, J. Greg Story, N. W M Ritchie, Curtis C. Bradley, Randall G. Hulet
Physics Faculty Research & Creative Works
An atomic beam of Li was transversely cooled using an intense standing-wave radiation field. A dramatic change in the transverse velocity distribution was observed. Structure in the resulting velocity distribution was found to be due to velocity-tuned multiphoton Doppleron resonances. The force due to seven-photon resonances is clearly resolved in the data. The data are in good agreement with theoretical predictions.
Mössbauer-Effect, Magnetic, And Neutron-Diffraction Study Of Nafep₂O₇, R. C. Mercader, L. Terminiello, Gary J. Long, D. G. Reichel, K. Dickhaus, R. Zysler, R. Sanchez, M. Tovar
Mössbauer-Effect, Magnetic, And Neutron-Diffraction Study Of Nafep₂O₇, R. C. Mercader, L. Terminiello, Gary J. Long, D. G. Reichel, K. Dickhaus, R. Zysler, R. Sanchez, M. Tovar
Chemistry Faculty Research & Creative Works
Neutron-diffraction, magnetic-susceptibility, specific-heat, and Mössbauer-effect studies of NaFeP2O7 reveal that it is a normal Heisenberg isotropic three-dimensional antiferromagnetic material with a Néel temperature of 29.0 K. NaFeP2O7 has the monoclinic P21/c magnetic space group, which is the same as the nuclear crystallographic space group. The easy axis of magnetization lies in the monoclinic ac plane at an angle of 21.0° from the c axis. The specific-heat measurements reveal a λ-type anomaly at 28.7(2) K. A molecular-field model analysis indicates that the intrasublattice magnetic exchange coupling Jaa=Jbb=-0.37 cm-1, whereas …
Oscillations In Lotka-Volterra Systems Of Chemical Reactions, Roger H. Hering
Oscillations In Lotka-Volterra Systems Of Chemical Reactions, Roger H. Hering
Mathematics and Statistics Faculty Research & Creative Works
For a chemical reaction system modeled by x =k1Ax -k2x2 -k3xy +k4y2, y =k3xy -k4y2 -k5y +k6B, it is shown that for each positive choice of parameters k1A, B there exists a unique stationary state which is globally asymptotically stable in the positive quadrant. A criterion for the non-existence of periodic solutions is given for the generalized Lotka-Volterra system:x = f(x)h(x, y), y. © 1990 J.C. Baltzer AG, Scientific Publishing Company.
Coupled-Channel Optical Calculation Of Electron-Hydrogen Scattering: The Distorted-Wave Optical Potential, Igor Bray, Don H. Madison, Ian E. Mccarthy
Coupled-Channel Optical Calculation Of Electron-Hydrogen Scattering: The Distorted-Wave Optical Potential, Igor Bray, Don H. Madison, Ian E. Mccarthy
Physics Faculty Research & Creative Works
The coupled-channel optical method solves a set of coupled momentum-space integral equations for a finite set of reaction channels. The remaining channels, including the target continuum, are described by the polarization potential operator, which formally depends on the full three-body state vectors for these channels. The distorted-wave optical potential makes the distorted-wave Born approximation for these state vectors, using exact target states. No other approximation is made. Calculations and comparison with experiment are reported for total ionization cross sections and asymmetries, total excitation cross sections, entrance-channel phenomena, and the coupled 1s,2s,2p channels, at a range of energies.
Rotational Effects In The Vuv Continuum Of H2, H. Schmoranzer, T. Noll, T. Noll, E. Roueff, H. Abgrall, Ronald James Bieniek
Rotational Effects In The Vuv Continuum Of H2, H. Schmoranzer, T. Noll, T. Noll, E. Roueff, H. Abgrall, Ronald James Bieniek
Physics Faculty Research & Creative Works
The effects of rotation-vibration interaction and of rotational coupling between the B 2p 1Σu+ and C 2p 1Πu electronic states on the B-X continuum of H2 were investigated spectroscopically using monochromatized synchrotron radiation for selective excitation of rovibronic states. The perturbed continuum intensities observed for the first time agree well with close-coupling calculations also performed. © 1990 IOP Publishing Ltd.