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The Missouri Miner, October 23, 1985

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, October 16, 1985

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, October 09, 1985

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, October 02, 1985

The Missouri Miner Newspaper

No abstract provided.

Missouri S&T Magazine, October 1985, Miner Alumni Association

Missouri S&T Magazine

No abstract provided.

Investigation Of The Appropriateness Of Sensitized Luminescence To Determine Exciton Motion Parameters In Pure Molecular Crystals, Vasudev M. Kenkre, Paul Ernest Parris, Dankward B. Schmid

Physics Faculty Research & Creative Works

A wealth of experimental data has been collected over the years regarding the sensitized luminescence of molecular crystals. Indeed, such observations have played a primary role in attempts to characterize the dynamical aspects of exciton transport in these materials. Nonetheless, as has been noted previously, serious questions of interpretation remain concerning the relationship between primary experimental observables and microscopic parameters which govern exciton transport and capture. In the past these questions have led to an uncertainty, not always acknowledged, in the values of exciton diffusion constants reported in the literature. On the other hand, careful analysis of some recent experiments …

Electron Production In Proton Collisions: Total Cross Sections, M. Eugene Rudd, Yongki Kim, Don H. Madison, Jean W. Gallagher

Physics Faculty Research & Creative Works

Existing data on the ionization of neutral atoms and molecules by proton impact are reviewed, and electron production cross-section data are collected. The three major experimental methods are discussed and possible sources of error identified. Some theoretical cross sections are discussed, and well-established methods of relating them to measured cross sections are reviewed. A mathematical equation is fitted to the weighted experimental data for each target, and these fits are adjusted to be consistent with appropriate theoretical calculations and with electron impact and photoionization data. Recommended values of total cross sections for proton-impact ionization are given.

The Missouri Miner, September 25, 1985

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, September 22, 1985

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, September 22, 1985

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, September 18, 1985

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, September 11, 1985

The Missouri Miner Newspaper

No abstract provided.

Vibration Coupling In Continuous Belt And Band Systems, C. D. Mote, W-Z Ben Wu

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Small transverse oscillation of an endless band supported by wheels couples the response of the free spans of the band to oscillation of the wheels. The coupling arises from the finite curvature of the free spans of the band when its bending stiffness is finite. Significant modeling error can occur if a single span of the band is modeled as a simply supported, axially moving beam. The coupling provides an opportunity to dissipate vibration energy. Experiments and finite element analyses support the coupling discussion presented. © 1985 Academic Press Inc.

The Missouri Miner, September 04, 1985

The Missouri Miner Newspaper

No abstract provided.

Load And Resistance Factor Design Of Cold Formed Steel Comparative Study Of Design Methods For Cold Formed Steel, Lan-Cheng Pan, Wei-Wen Yu, Brian K. Snyder

CCFSS Library (1939 - present)

Allowable Stress Design is the current method used to design cold-formed steel structural members and connections. In this design approach, factors of safety are used to compute the allowable design stresses which are compared to the actual maximum stresses that will occur in the member during the life of the structure. In recent years, the Load and Resistance Factor Design (LRFD) method has been developed for the design of hot-rolled steel shapes and the design of cold-formed steel structural members. This method is based on probabilistic and statistical techniques to account for the many uncertainties involved with the actual design. …

Design Of Automotive Structural Components Using High Strength Sheet Steels - Results And Evaluation Of Stub Column Tests For Unstiffened Curved Elements, Wei-Wen Yu, M. Brad Parks

CCFSS Library (1939 - present)

I. INTRODUCTION A. GENERAL In the past few years, a dramatic increase in the use of high strength sheet steels in automobiles has been brought about by the demand for improved fuel economy and safety of motor vehicles. Many of the automotive structural components, which are made of high strength sheet. steels, consists either partially or totally of curved elements. Therefore, it was decided to include an investigation into the structural behavior of curved elements as a part of a research project entitled, "Structural Design of Automotive Structural Components Using High Strength Sheet Steels." The research project began in early …

Load And Resistance Factor Design Of Cold-Formed Steel Revised Tentative Recommendations - Load And Resistance Factor Design Criteria For Cold-Formed Steel Structural Members With Commentary, Wei-Wen Yu, Theodore V. Galambos

CCFSS Library (1939 - present)

The "Allowable Stress Design Method" has long been used for the design of cold-formed steel structural members. The "Load and Resistance Factor Design Method" has recently been developed from a research project sponsored by American Iron and Steel Institute. In this method, separate load and resistance factors are applied to specified loads and nominal resistance to ensure that the probability of reaching a limit state is acceptably small. These factors reflect. the uncertainties of analysis, design, loading, material properties and fabrication. They are derived on the basis of the first order probabilistic methodology as used for the development of the …

Time-Dependent Magnetic Structures Of The Superconducting Mixed Ternary System Ho(Rh₁₋ₓirₓ)₄B₄, Steven E. Lambert, M. Brian Maple, Oran Allan Pringle, Herbert A. Mook

Physics Faculty Research & Creative Works

Magnetic structures have been determined by netron diffraction for several compositions in the superconducting mixed ternary system Ho(Rh_1-xIr_x)₄B₄. Two features previously reported to occur in the heat capacity for some compositions are shown to correspond to successive magnetic transitions. For x=0.30 and 0.45, neutron diffraction peaks for the lowest temperature structure develop over a timescale of many hours. The results are discussed in terms of magnetic frustration.

Angular Differential Cross Sections For The Excitation Of 1¹S Helium To The 2¹S And 2¹P States By 25- To 100-Kev-Proton Impact, Thomas J. Kvale, Denver G. Seely, D. M. Blankenship, E. Redd, Timothy Gay, Mineo Kimura, Eduard P. Rille, Jerry Peacher, John T. Park

Physics Faculty Research & Creative Works

Angular differential cross sections for the proton-impact excitation of ground-state helium (1¹S) to the 2¹S and 2¹P states have been measured for the first time in the energy range 25 to 100 keV with use of the energy-loss technique. The data indicate that, for very small scattering angles, at 25 keV the 2¹S differential cross section is greater than the 2¹P differential cross section. For impact energies greater than 50 keV, the 2¹P differential cross section clearly dominates over the 2¹S cross section in the very …

The Missouri Miner, August 28, 1985

The Missouri Miner Newspaper

No abstract provided.

Method And Apparatus For Performing Hashing Operations Using Galois Field Multiplication, John L. Carter, George Markowsky, Mark N. Wegman

Computer Science Faculty Research & Creative Works

The invention comprises a method and apparatus for performing a hashing operation on an N bit number under control of a prespecified N bit hashing constant which comprises performing N/K finite field partial multiplications of the object to be hashed by the hashing constant, utilizing K logic and combinatorial circuits all of which operate in parallel to completely evaluate the number in N/K operations.

Another feature of the present invention is that the hashing constant loaded into the system may be changed at will with a resultant changing of the hashing characteristics to suit a particular class of objects to …

The Missouri Miner, August 01, 1985

The Missouri Miner Newspaper

No abstract provided.

Missouri S&T Magazine, August 1985, Miner Alumni Association

Missouri S&T Magazine

No abstract provided.

Low Temperature Tunneling Dynamics In Condensed Media, Paul Ernest Parris, Robert J. Silbey

Physics Faculty Research & Creative Works

There has been considerable interest recently in the low temperature dynamics of condensed phase tunneling phenomena. In this paper we consider the interplay between quasiparticle transport and vibrational relaxation; the former taking place via tunneling in a double well potential, and the latter occurring due to interactions of the tunneling system with a harmonic bath. Taking the system-bath interactions to be linear in the bath coordinates, and explicitly allowing for a vibrationally excited well, we present a unified treatment of the weak and strong coupling regimes and obtain reduced equations of motion for the tunneling particle position operator. Solutions are …

A Monte Carlo Analysis Of The Mincycle Algorithm For Generating Minimal Perfect Hash Functions, Pao-Po Hou, Thomas J. Sager

Computer Science Technical Reports

In this paper, several minimal perfect hashing function generating methods are examined. One of them, the mincycle method by Sager is evaluated by the Monte Carlo method. The results are represented in graphs and tables.

A Parallel Branch And Bound Algorithm For Integer Linear Programming Models, Rochelle L. Boehning, Billy E. Gillett

Computer Science Technical Reports

A parallel branch and bound algorithm is developed for use with MIMD computers to study the efficiency of parallel processors on general integer linear programming problems. The Haldi and IBM test problems and a System Design model are used in the implementation of the algorithm. Initially the algorithm solves the Haldi and IBM test problems on a single processor computer which simulates a multiple processor computer. The algorithm is then implemented on the Denelcor HEP multiprocessor using two of the IBM problems to compare the results of the simulation to the results using an MIMD computer. Finally the algorithm is …

Minimum Probability Of Electron-Hole Pair Generation By Blackbody Radiation, Cheng-Hsiao Wu

Electrical and Computer Engineering Faculty Research & Creative Works

Using the small-perturbation assumption that all the useful work is in the form of electron-hole pairs when photons from a blackbody radiation source are incident on a quantum device, we derive the minimum probability of generation of one or more pairs of electron holes. Using the Planck radiation formula for the solar spectrum at 6000 K and for the quantum device at 300 K, this minimum probability is about 0.8 at low photon frequency and approaches the limiting value of 0.95 at high frequency. Its relation to maximum efficiency of a quantum device is discussed.

An Algorithm For Parallel Subsumption, Ralph M. Butler, Arlan R. Dekock

Computer Science Technical Reports

Many current automated theorem provers use a refutation procedure based on some version of the principle of resolution. These methods normally lead to the generation of large numbers of new clauses. Subsumption is a process that eliminates the superfluous clauses from the clause space, thus speeding up the proof. The research presented in this thesis is concerned with the design and implementation of a subsumption algorithm which exploits the parallelism provided by a multiprocessor. For portability, all coding is done in the programming language C. Monitors are used as the synchronization mechanism. Correct performance in both a multiprocessor and uniprocessor …

The Missouri Miner, May 01, 1985

The Missouri Miner Newspaper

No abstract provided.

The Missouri Miner, April 24, 1985

The Missouri Miner Newspaper

No abstract provided.