Engineering Commons^™

Ground-Water Policy-Making Support: Usem Optimization Modelling Plus Gis And Graphics, Richard C. Peralta, Christopher M. U. Neale, Ali Gharbi, Mazibur Khan, Oscar Daza, Douglas Ramsey, Kurt Vest

Civil and Environmental Engineering Faculty Publications

A support tool for ground-water management decision making involves integration of a multiobjective optimization model, GIS and graphics software. Two results are improved consideration of spatial data within the optimization model and improved conversion of optimal strategies to real-world application. Another result is improved visualization of the trade-offs involved between conflicting management goals.

34th Rocky Mountain Conference On Applied Spectroscopy

Rocky Mountain Conference on Magnetic Resonance

Program and registration information for the 34th annual meeting of the Rocky Mountain Conference on Applied Spectroscopy, co-sponsored by the Colorado Section of the American Chemical Society and the Rocky Mountain Section of the Society for Applied Spectroscopy. Held in Denver, Colorado, August 2-6, 1992.

Ccfss Technical Bulletin August 1992, Wei-Wen Yu Center For Cold-Formed Steel Structures

CCFSS Technical Bulletins (1993 - 2020)

No abstract provided.

Acuta Enews August 1992, Vol. 21, No. 8

ACUTA Newsletters

In This Issue

FCC gives nod to touch-tone video

President's column

West Chester starting student resale

Security at Yale

ACUTA Calender

Phone taps snare hackers

Thermal Post-Buckling And Vibration Analysis Of Thermally Buckled Antisymmetrically Laminated Beams Using A 20 Dof Finite Element, Misao Mizuno

Master's Theses - Daytona Beach

The purpose of this study is to use the finite element method to analyze thermal buckling, post-buckling, and vibrations of thermally buckled composite beams including shear deformation. The beam element used has ten degrees of freedom at each node: axial displacement, transverse displacement due to bending and shear, twisting angle, inplane shear rotation and their derivatives with respect to x. Hermitian polynomials and Lagrange's equation were used to derive the equations of motion. The equations of motion were divided into static and dynamic parts. For buckling analysis, the eigenvalue problem was solved for the critical temperature. The scaled first mode …

Us/Wells Vs. 1.05 User's Manual, Alaa H. Aly, Richard C. Peralta

Civil and Environmental Engineering Faculty Publications

Presented is a computer program, US/WELLS, that is designed to solve several types of groundwater management problems. The acronym US/WELLS stands for Utah State WELL System. This decision-support tool is usable by persons slightly familiar with groundwater hydraulics. It can be valuable for practical management of groundwater systems that satisfy certain criteria.

Beginning Of Motion For Selected Unanchored Residue Materials, John E. Gilley, Eugene R. Kottwitz

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Conservation tillage systems help to maintain residue materials from the previous crop on the soil surface. The potential for serious erosion may exist if crop residues are removed by overland flow. This study is conducted to identify the hydraulic conditions required to initiate residue movement by overland flow. Corn, cotton, peanut, pine needles, sorghum, sunflower, and wheat residue are placed in a flume on smooth and sand surfaces, and flow is then introduced in progressive increments. The discharge rate and flow velocity required to initiate residue movement are identified. Hydraulic measurements are used to calculate the ratio of critical flow …

Dna Mapping Algorithms: Strategies For Single Restriction Enzyme And Multiple Restriction Enzyme Mapping, Will Gillett

All Computer Science and Engineering Research

An approach to high-resolution restriction-fragment DNA mapping, known as Multiple-Restriction-Enzyme mapping (MRE mapping), is present. This approach significantly reduces the uncertainty of clone placement by using clone ends to synchronize the position in of clones within different maps, each map being constructed from fragment-length data produced by digestion of each clone with a specific restriction enzyme. Maps containing both fragments-length data and clone-end data are maintained for each restriction enzyme, and synchronization between two such maps is achieved by requiring them to have "compatible" clone-end map projections. Basic definitions of different kinds of maps, such as restriction sites maps, restriction …

Design Curves For The Reuse Of Stormwater, Martin Wanielista

BMP Trains Research and Publications

No abstract provided.

Design And Performance Of A Bituminous Surface Mixture Containing Bottom Ash Aggregate, David Q. Hunsucker

Kentucky Transportation Center Research Report

A one-mile experimental bituminous surface overlay was placed in October 1987 on State Route 3 in Lawrence County, Kentucky. The experimental section utilized bottom ash aggregate from the Kentucky Power Company's Big Sandy Power Plant, near Louisa, Kentucky. Bottom ashes are generally angular and have very porous surfaces. Approximately 539 tons of the experimental bituminous surface material, containing 40 percent bottom ash (dry weight), were placed. Reported herein are results of laboratory tests and performance evaluations of the experimental surface mixture.

Performance of the experimental bottom ash surface has been excellent. Skid resistance tests indicate the surface is highly skid …

Measured Electricity Savings Of Refrigerator Replacement: Case Study And Analysis, Florida Solar Energy Center, Ted Stedman

FSEC Energy Research Center®

There are approximately seven million refrigerator-freezers in the State of Florida. The average demand of these units is at least 1,000 MW. The average life of a residential refrigerator is approximately 20 years (U.S. DOE, 1989). At least 25% of Florida's existing stock are old inefficient units built before the advent of recent appliance efficiency standards. The least efficient are existing models of which approximately 5% of the stock is replaced each year. This represents a significant opportunity for efficiency improvement since recently established standards will greatly improve refrigerator efficiency by 1993 (NAECA, 1987). A number of studies have identified …

Review: 'Theory Of Dielectric Optical Waveguides,' 2nd Edition, By Dietrich Marcuse, Bradley D. Duncan

Electro-Optics and Photonics Faculty Publications

I suppose I ought to say up front that while preparing this review I often found myself feeling very much like a student evaluating his teacher. After all, it was, in part, the first edition of Dietrich Marcuse's Theory of Dielectric Optical Waveguides (among a handful of other similar texts) from which I first studied the principles of optical waveguide theory under the demanding, yet patient and graceful guidance of Dr. Ahmad Safaai-Jazi. Thus with the utmost respect for a teacher whom I have never met, I shall try to faithfully share my thoughts and feelings regarding the second edition …

Solutions Of The Heat Conduction Equation In Multilayers For Photothermal Deflection Experiments, William A. Mcgahan, Kevin D. Cole

Department of Mechanical and Materials Engineering: Faculty Publications

Exact expressions are presented for the deflection of a laser beam passing parallel to and above the surface of a sample heated by a periodically modulated axisymmetric laser beam. The sample may consist of any number of planar films on a thick substrate. These exact expressions are derived from a local Green’s function treatment of the heat conduction equation, and contain an exact analytical treatment of the absorption of energy in the multilayered system from the heating laser. The method is based on calculation of the normal component of the heat fluxes across the layer boundaries, from which either the …

An Optical Technique For Measurement Of Semiconductor Surface Electric Fields, Harshad P. Sardesai, William C. Nunnally

P. F. (Paul Frazer) Williams Publications

We present an optical technique for the measurement of semiconductor surface electric fields. The measurement technique uses the Kerr electro-optic effect in nitrobenzene, a phase sensitive interferometer, and associated data acquisition units to measure the surface electric fields between the contacts of a planar semiconductor device. This technique was used to measure the surface fields on silicon devices used in pulsed power applications, but has the potential for use as an electric field probe for any device having high surface electric fields, both pulsed and dc. The measurement technique showed a temporal resolution of 100 ns, which can be easily …

Modeling Of A-Si : H Deposition In A Dc Glow Discharge Reactor, Dariusz Orlicki, Vladimir Hlavacek, Hendrik J. Viljoen

Papers in Reaction Kinetics

PECVD reactors are increasingly used for the manufacturing of electronic components. This paper presents a reactor model for the deposition of amorphous hydrogenated silicon in a dc glow discharge of Ar-SiH₄ The parallel-plate configuration is used in this study. Electron and positive ion densities have been calculated in a self-consistent way. A macroscopic description that is based on the Boltzmann equation with forwardscattering is used to calculate the ionization rate. The dissociation rate constant of SiH₄ requires knowledge about the electron energy distribution function. Maxwell and Druyvesteyn distributions are compared and the numerical results show that the deposition …

Performance Of A Modified Turned-Down Guardrail End Treatment In Traffic Accidents, Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

The objective of this study was to report the results of the continued monitoring of the performance of the modified turned-down guardrail end treatment (Type 7) in traffic accidents. Data for a total of 67 accidents involving the modified turned-down guardrail end treatment were identified. Performance was classified as proper in 51 of the 61 accidents (84 percent) in which it was determined. In the majority of the accidents in which proper performance occurred, the vehicle either traveled onto the top at the guardrail beyond the breakaway section or broke through the breakaway posts and proceeded behind the guardrail.

The …

Youth Needs And Assessment Survey, Kenneth R. Agent, Jerry G. Pigman

Kentucky Transportation Center Research Report

The characteristics of traffic accidents involving teenage (16 to 19 years of age) drivers are summarized in this report and compared to all accidents. This was accomplished through an analysis of statewide accident data for a three-year period (1989 through 1991). Counties having the highest overrepresentation of accidents involving teenage drivers were identified. The status of highway safety programs currently in place in school districts in Kentucky is presented. A survey was sent to 182 school districts in Kentucky with a 64 percent response rate obtained. Relevant literature was reviewed, and summary statements are given in the Appendix. This summary …

Ccfss News August 1992, Wei-Wen Yu Center For Cold-Formed Steel Structures

CCFSS Newsletters (1999 - 2008)

No abstract provided.

Integrated Optical Transmitters And Receivers Using Multi-Segment Laser Processes, J. G. Wasserbauer, Dennis J. Derickson, K. Giboney, R. J. Helkey, J. R. Karin, A. Mar, J. E. Bowers

Electrical Engineering

No abstract provided.

Electroluminescence And Electrical Transport In Poly(3-Octylthiophene) Diodes, David Braun, G. Gustafsson, D. Mcbranch, A. J. Heeger

Electrical Engineering

We report visible light emission from diodes made from poly(3-octylthiophene). Use of a soluble derivative of polythiophene allows fabrication of the light emitting diodes by casting the polymer film from solution with no subsequent processing or heat treatment required. The devices emit dim red-orange light with relatively low external quantum efficiencies, below 2.5×10⁻⁵ photons per electron at room temperature. Electrical characterization reveals diode behavior with rectification ratios greater than 10². The temperature dependence indicates that tunneling phenomena dominate the charge injection.

Can Pac Learning Algorithms Tolerate Random Attribute Noise?, Sally A. Goldman, Robert H. Sloane

All Computer Science and Engineering Research

This paper studies the robustness of pac learning algorithms when the instances space is {0,1}n, and the examples are corrupted by purely random noise affecting only the instances (and not the labels). In the past, conflicting results on this subject have been obtained -- the "best agreement" rule can only tolerate small amounts of noise, yet in some cases large amounts of noise can be tolerated. We show that the truth lies somewhere in between these two alternatives. For uniform attribute noise, in which each attribute is flipped independently at random with the same probability, we present an algorithm that …

Acuta Enews July 1992, Vol. 21, No. 7

ACUTA Newsletters

In This Issue

President's column

Two Region Directors elected

Party Line

Northeast Region meeting

Santa Clara Magazine, Volume 34 Number 4, Summer 1992, Santa Clara University

Santa Clara Magazine

12 - SQUEEZING THE MIDDLE CLASS Gone, in the face of staggering recessionary losses, is the peace of mind that once seemed the virtual birthright of the middle class. By Elizabeth Fernandez '79

18 - A FRAGILE PEACE El Salvador shows a ravaged but hopeful face to a delegation from SCU, Stanford, and the Diocese of San Jose. By Thomas Shanks, S.J.

24 - IT TAKES TEAMWORK Facing fierce global competition, more and more U.S. companies are exploring work teams. By Lisa Agrimonti '87

28 - GIVING TO SANTA CLARA: IT RUNS IN THE FAMILY A tradition of giving and …

Discourse-Level Analysis Of Abstracts For Information Retrieval: A Probabilistic Approach, Robert N. Oddy

School of Information Studies - Faculty Scholarship

The objective of this research is to contribute to our knowledge of how people seek information, and how computer systems can be designed to help in this process. Most information retrieval research since the field emerged in the 1950's has reduced these questions to that of trying to determine how documents relevant to a user's query might be selected from a large collection of texts---a question that has proved remarkably difficult to answer. The present work takes the stance that this particular reduction increasingly limits progress towards the objective stated above. It is directed instead towards the development of a …

Application Of An Itô-Based Approximation Method To Random Vibration Of A Pinching Hysteretic System, Mohammad N. Noori, Mark D. Padua, Hamid Davoodi

Office of the Dean (CENG) Scholarship

In this paper, an extension of the Cumulant-Neglect closure scheme is utilized for the random vibration analysis of a single degree of freedom system with a general pinching hysteresis restoring force. The hysteresis element used in the system model can simulate commonly observed forms of stiffness, strength and pinching degradations. The second order statistics of the system response to a stationary Gaussian white noise input are derived using an Itô-based approximation technique. The validity of these response statistics are then verified by comparing them to Monte Carlo simulation results. The numerical studies performed for different combinations of degradation parameters and …

The Calendar - July And August 1992, Nova University

The Calendar

No abstract provided.

Impulse, Cindy Price, Julianne Trautmann, Steve Poessnecker

Impulse (Jerome J. Lohr College of Engineering Publication)

Features:
[Page 2] InterActive, a multimedia leader with plans to grow
[Page 4] SDSU/lnterActive link producing new voice command system
[Page 5] South Dakota climate nurtures life
[Page 7] Dakota Mobile Hydraulics continues to expand
[Page 8] Special Teams president puts SDSU minor to good use
[Page 10] Eleanor Baum: challenges for women in engineering
[Page 12] Crossman, Borhard named 1992 Distinguished Engineers
[Page 13] 1992 Engineering Exploration Days includes inventors' congress
Departments:
Faculty:
[Page 14] SDSU chosen for NASA JOVE project
[Page 16] Retiring professor to run for legislature, finish book on family history
[Page 17] University/Industry Technology Service …

In Vitro Development Of Zygotes From Prepubertal Gilts After Microinjection Of Dna, B. L. Williams, J. L. Johnson, A. E.T. Sparks, R. S. Canseco, J. W. Knight, William H. Velander, R. L. Page, W. N. Drohan, J. M. Young, R. E. Pearson, T. D. Wilkins, F. C. Gwazdauskas

Papers in Biotechnology

The effect of pronuclear microinjection of DNA and culture in excised mouse oviducts on the development of porcine zygotes was assessed in this study. Precocious ovulation was induced in prepubertal gilts with pregnant mare's serum gonadotrophin and hCG. Zygotes received either pronuclear microinjection of buffer alone, buffer containing a DNA construct, or no microinjection. Zygotes were cultured in vitro in either modified Krebs-Ringer bicarbonate medium (KRBI for 144 h or in mouse oviduct (MO) explant culture with KRB for 48, 72, 96, or 120 h. Pronuclear microinjection of DNA resulted in a lower (P < .05) cleavage index (CII than did buffer or no microinjection (CI 2.16 k .10 vs 2.80 f .13 and 2.93 f .lo). The CI loss was greatest for DNA-injected zygotes at the two-cell stage of development. Coculture of zygotes in MO resulted in a higher CI (P < .01) than did culture in KRB. Culture in MO for 72 h was the most beneficial system compared with MO for 48, 96, or 120 h (P < .05; CI 3.25 k .12 vs 2.66 k .18, 2.79 f .14, and 2.40 .14, respectively). Microinjection of DNA, not merely the mechanical procedure, was detrimental to early zygote development and may be the cause of low pregnancy rates.

Feature-Based Correlation Filters For Distortion Invariance, Samuel Peter Kozaitis, Robert Petrilak, Wesley E. Foor

Electrical Engineering and Computer Science Faculty Publications

In an optical correlator, binary phase-only filters (BPOFs) that recognize objects that vary in a nonrepeatable way are essential for recognizing objects from actual sensors. An approach is required that is as descriptive as a BPOF yet robust to object and background variations of an unknown or nonrepeatable type. We developed a BPOF that was more robust than a synthetic discriminant function (SDF) filter. This was done by creating a filter that retained the invariant features of a training set. By simulation, our feature-based filter offered a range of performance by setting a parameter to different values. As the value …

Optical Estimation Of Fractal Dimension For Image Assessment, Samuel Peter Kozaitis, Rufus H. Cofer

Electrical Engineering and Computer Science Faculty Publications

We modeled an optical system for estimation of the fractal dimension to provide a measure of surface roughness for an entire image and for image segmentation. Although the simulated optical result was similar to that calculated by digital techniques, both suffered from problems known to occur with estimating fractal dimension. Furthermore, the optical estimation did not have as good a resolution as that obtained with digital estimates due primarily to the limited dynamic range of the detector.