Engineering Commons^™

Identification Of Dynamic Properties Of Materials For The Nuclear Waste Package, Brendan O'Toole, Mohamed Trabia, Amy J. Smiecinski

Publications (YM)

Stainless steel 316L, titanium alloy grade 7, and alloy C22 are currently under consideration as candidate materials for use in various components associated with the spent nuclear fuel package, which must be designed to withstand structural deformation caused by static, thermal, and handling loads. In addition, it has to maintain its integrity in case of accidents, where it may be subjected to high loads over a very short period of time. Mechanical characteristics of these three materials under dynamic loading are not well documented. This paper describes the procedures and results obtained from experiments performed over a range of slow …

Greedy Algorithms For Optimizing Multivariate Horner Schemes, Martine Ceberio, Vladik Kreinovich

Departmental Technical Reports (CS)

For univariate polynomials f(x1), Horner scheme provides the fastest way to compute the value. For multivariate polynomials, several different version of Horner scheme are possible; it is not clear which of them is optimal. In this paper, we propose a greedy algorithm that will hopefully lead to good computation times.

A univariate Horner scheme has another advantage: if the value x1 is known with uncertainty, and we are interested in the resulting uncertainty in f(x1), then Horner scheme leads to a better estimate for this uncertainty than many other ways of computing f(x1). The second greedy algorithm that we propose …

Interval Approach To Phase Measurements Can Lead To Arbitrarily Complex Sets - A Theorem And Ways Around It, Bharat C. Mulupuru, Vladik Kreinovich, Roberto Osegueda

Departmental Technical Reports (CS)

We are often interested in phases of complex quantities; e.g., in non-destructive testing of aerospace structures, important information comes from phases of Eddy current and magnetic resonance.

For each measurement, we have an upper bound D on the measurement error dx=X-x, so when the measurement result is X, we know that the actual value x is in [X-D,X+D]. Often, we have no information about probabilities of different values, so this interval is our only information about x. When the accuracy is not sufficient, we perform several repeated measurements, and conclude that x belongs to the intersection of the corresponding intervals. …

Evaluation Of Us 119 Pine Mountain Safety Improvements (Interim Report), Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

The safety improvement project for a section of US 119 across Pine Mountain in Letcher County was initiated as an interim effort to address safety issues related to roadway geometrics and specific problems related to truck traffic. The project involves sections of the road being improved over a 7.2-mile length at a cost of approximately $36 million.

The Transportation Center at the University of Kentucky was requested to perform an evaluation of the safety improvement project on US 119 to determine whether the types of improvements undertaken have affected the overall safety of the roadway. Specific objectives were as follows; …

Variations In Control And Display Gain In A First Control Order Compensatory Manual Tracking Task, Micah N. Morris

Master's Theses - Daytona Beach

There exist many factors that contribute to the optimal manual control of a system by a human operator (HO). Two such variables include control gain and display gain. Of particular interest to the following experiment is the contribution of these two variables to the manual tracking performance of any HO conducting a compensatory tracking task while using a first control-order tracking system. Since the optimal level of control gain required for maximal manual control of a tracking device is system dependent, it may be expected that the same holds true of display gain. Regardless, it is the purpose of the …

The Search For The Opto-Kinetic Cervical Reflex And Reduced Roll Reversals In Pilots Viewing A 3-D Perspective Display, John Carl Faust

Master's Theses - Daytona Beach

Pilots using conventional instrumentation can suffer spatial disorientation (SD) when unexpectedly forced to transition from visual flight to instrument flight during roll maneuvers. This simulator study was conducted to see if a 3-D perspective display could prevent this form of spatial disorientation by eliciting the opto-kinetic cervical reflex (OKCR), an instinctive postural response that humans use to maintain awareness of their spatial orientation. The current research found evidence of the OKCR in pilots viewing both a 3-D perspective display and an electronic attitude indicator. Pilots viewing a standard moving-horizon attitude indicator produced little or no OKCR response. However, pilots still …

2003 (Fall) Ensi Informer Magazine, Morehead State University. Engineering Sciences Department

ENSI Informer Magazine Archive

The ENSI Informer Magazine published in the fall of 2003.

Vibration Analysis Of A Fan/Compressor Blade, Daisaku Inoyama

Master's Theses - Daytona Beach

The vibration of blades in gas turbine engines has become an important issue during the last decade because of its significant impact on high cycle fatigue failure due to resonant vibrations. The main objective of this thesis is the vibration analysis of compressor/fan blade using three-dimensional finite element analysis together with various analytical approaches. First, the analytical solutions were established using various analytical methods, Bernoulli-Euler, Rayleigh, Rayleigh-Ritz, two-dimensional plate, and Timoshenko beam methods. Then, the vibration behaviors of the blade are analyzed in full extent using commercially available finite element solver, MSC.NASTRAN, and correlated with the analytical solutions. The finite …

Acuta Enews October 2003, Vol. 32, No. 10

ACUTA Newsletters

In This Issue

From the President.................... Walter L. Czerniak, President

Fire Safety: Should Cables Have a Warning Label?.......................... Frank Bisbee &, Diane Santarelli

ACUTA Board Report....................... Jeri semer, ACUTA Executive Director

Tech Talk.................. Kevin Tanzillo, Dux Public Relations

DC Update Whitney Johnson, Retired, Northern Michigan Univ.

ACUTA: Help Yourself to a Buffet of Benefits!

Welcome New Members

Nebraska Blueprint – Fall 2003

Nebraska Blueprint (Student Publication)

Table of Contents:

From the Editor

The Big Room Where They Smash Stuff – A closer look at the Structures Lab

Interactive Innovation – Students and professionals create interactive engineering exhibit

Making Their Way: Women Find Their Place in Engineering

More Than Meets the Eye – Getting to know Dr. Jennifer Brand

What We Wish We Had Known – At the close of their first semester, freshmen look back

Taking Out the Garbage in Style – Computer Engineering students embark on new research

A Conversation with Jeremy Befort – Student reaches out to others

Book Review: Skunk Works: A Personal …

Polymer-Based Capacitors, Junction Field -Effect Transistors, And A Follower Circuit By Lithography, Self -Assembly, And Ink -Jet Printing Techniques, Yuxin Liu

Doctoral Dissertations

The study of organic materials to create field-effect transistors has recently emerged and is gaining much interest. All-polymer electronic devices are currently in their infancy, like semiconductor devices when they first appeared. As a result, current performance of these devices is in no way comparable to the state-of-the-art semiconductor devices. However, all-polymer devices have a few possible appealing advantages. First, all polymer devices have the potential for low-cost fabrication due to their ease of manufacturability, with fewer and simpler processing steps compared with solid-state semiconductor devices. Secondly, polymer devices offer the ability of material flexibility. Lastly, polymer devices may prove …

Use Of Computer Spreadsheets And Paper-Based Workbooks To Teach Comprehensive Nutrient Management Planning, Charles A. Shapiro, R. L. Deloughery, Richard K. Koelsch, M. K. Kucera, Charles S. Wortmann

Department of Agricultural and Biological Systems Engineering: Faculty Publications

The objective of this program was to provide producers and ag advisors the skills needed to apply for and maintain the non-engineering components of a Nebraska permit to operate a livestock waste control facility. This includes a Comprehensive Nutrient Management Plan (CNMP). Eighty six producers and advisors participated in an intensive three-session hands-on class with a total of nine contact hours at four sites in eastern Nebraska in the spring of 2002. The workshop included lecture and participant use of spreadsheet tools to assist with performing the necessary calculations. With an average of 68 % responses per session, 58% rated …

Statistical Approach To The Emi Modeling Of Large Asics By A Single Noise-Current Source, Giulio Antonini, James L. Drewniak, Marco Leone, Antonio Orlandi, Vittorio Ricchiuti

Electrical and Computer Engineering Faculty Research & Creative Works

Large and complex ASICs are source of propagating noise inside the powerbus planes. A lumped noise source model is proposed and validated by means of a statistics based method.

Suitability Of Pulse Train™, A Novel Digitally Implemented Real-Time Control Technique, For Bifred Converter, Mehdi Ferdowsi, Ali Emadi, Mark Telefus, Anatoly Shteynberg

Electrical and Computer Engineering Faculty Research & Creative Works

Pulse Train^TM, a new control scheme, is presented and applied to a BIFRED converter operating in discontinuous conduction mode (DCM), which avoids the light-load high-voltage stress problem. In contrast to the conventional control techniques, the principal idea of Pulse Train is to regulate the output voltage using a series of high and low energy pulses generated by the current of the inductor. In this paper, applicability of the proposed technique to both the input and magnetizing inductances of BIFRED converter is investigated. Analysis of BIFRED converter operating in DCM as well as the output voltage ripple estimation are …

Evaluation And Analysis Of Highway Pavement Drainage, Kamyar C. Mahboub, Yinhui Liu, David L. Allen

Kentucky Transportation Center Research Report

This report presents an analysis of pavement drainage using various finite element models. The analysis included a range of pavement materials and drainage parameters. The computational tool in study was the SEEP/W option in the GEOSLOPE computer program. A steady-state saturated flow analysis was employed to generate flow paths and flux quantities through the cross-sectional area of the pavement. Finite element models in this study covered various drainage practices and quantified their relative drainage advantages. Finally, recommendations were provided for optimum drainage practices as well as future research topics in this area.

Copious Electronic Text On Small Screen Interfaces: A New Method Of Displaying Text On Cell Phones, William Fitzpatrick

Master's Theses - Daytona Beach

A modified form of RSVP (rapid serial visual presentation) was presented to 15 male and 15 female undergraduate and graduate students from Embry-Riddle Aeronautical University. The participants read 9 short passages electronically presented as 2, 4, or 6 lines of text in rapid sequence on a simulated cell phone display interface, at three speeds. Comprehension of text passages was examined in an attempt to find an ideal method of presenting lengthy text on a small screen interface. The results indicated that as participants were exposed to greater speeds and an increasing number of lines their comprehension of the passages decreased. …

A Computer-Based Articulation Training Aid For Short Words (Cata), Mukund Devarajan

Electrical & Computer Engineering Theses & Dissertations

Several improvements in the vowel articulation training aid (VATA) are described, as well as the efforts to extend the visual feedback system to operate with short words in the form of consonant, vowel and consonant (CVC). The extended version of the visual feedback system is referred to as CATA (Computer-based Articulation Training Aid); the vowel version of the aid (VATA) only operates with ten American English monopthong vowels. Improvements in VATA include the use of a neural network (NN) recognizer method to prune a large database of vowel recordings to eliminate noisy and/or mispronounced tokens. The spectral jitter problem, previously …

Unidirectional Cordic For Efficient Computation Of Trigonometric And Hyperbolic Functions, Satish Ravichandran

Electrical & Computer Engineering Theses & Dissertations

CORDIC (Coordinate Rotation Digital Computer) is an iterative algorithm to compute values of trigonometric, logarithmic and transcendental functions by performing vector rotations, which can be implemented with only shift and add operations in a digital system. CORDIC algorithms are extensively used in the areas of digital signal processing, digital image processing and artificial neural networks. A new technique, named unidirectional CORDIC, for efficient computation of trigonometric and hyperbolic functions is presented in this thesis. In the conventional CORDIC algorithm, the vector rotations are performed in both clockwise and counterclockwise directions, but in the unidirectional CORDIC the vectors are rotated only …

Adaptive Parallel Framework Algorithm (Apfa) For Environmental Engineering Applications, Lianghua Zhou

Civil & Environmental Engineering Theses & Dissertations

This research proposes a new framework methodology for integrating environmental computer applications in flexible, open and adaptively and reusable manners so that the resulting application framework could be used to effectively, flexibly and rapidly handle various environmental problems and issues. Research also demonstrates the framework algorithm with a case study. The proposed algorithm is referred as Adaptive Parallel Framework Algorithm (APF A). Core concept of the APF A is based on a parallelism, "many-to-one" mode to communicate among environmental applications, and takes advantages of a loosely coupled technology that helps archiving the required flexibility, extensibility and usability of integrated systems. …

The Effects Of A Modified Gantt Chart Depicting Schedule Risk, Joseph Allen Hope

Computational Modeling & Simulation Engineering Theses & Dissertations

The tools and methodologies used to manage projects continue to evolve. A popular project management tool for monitoring a project's schedule is the Gantt chart. The Gantt chart provides information about projected start and end times for each task of a project. A critical limitation of the Gantt chart, however, is its inability to depict uncertainty surrounding the project schedule, or project schedule risk. The present study investigated the effectiveness of three alternative formats for depicting schedule risk. The three presentation formats used were a table, a table with a traditional Gantt chart, and a table and a modified Gantt …

Wind-Induced Exchange In Semi-Enclosed Basins, Rosario Sanay

OES Theses and Dissertations

The wind-induced circulation over laterally varying bathymetry was investigated in homogeneous and in stratified systems using the three-dimensional Regional Ocean Model (ROMS). For homogeneous systems, the focus was to describe the influence of the earth's rotation on the lateral distribution of the flow with particular emphasis on the transverse circulation. Along-basin wind-stress with no rotation caused a circulation dominated by an axially symmetric transverse structure consisting of downwind flow over the shoals and upwind flow in the channel along the whole domain. Transverse circulation was important only at the head of the system where the water sank and reversed direction …

2003 Scholars And Artists Bibliography, Michael Schwartz Library, Cleveland State University, Friends Of The Michael Schwartz Library

Scholars and Artists Bibliographies

This bibliography was created for the annual Friends of the Michael Schwartz Library Scholars and Artists Reception, recognizing scholarly and creative achievements of Cleveland State University faculty, staff and emeriti

Examination Of Focused Beam Propagation Through A Finite Non-Reciprocal Planar Chiral Slab Using Complex Fresnel Coefficients And Dual Transforms, Monish Ranjan Chatterjee, Sumit Nema, Partha P. Banerjee

Electrical and Computer Engineering Faculty Publications

Recently, uniform plane wave propagation across a nonchiral-chiral interface was examined via the development of appropriate Fresnel coefficients. In this extension, propagation of focused uniform and profiled beams through a finite, planar nonreciprocal chiral slab is investigated using complex Fresnel coefficients via angular plane wave decomposition and dual transforms.

A Mushy-Zone Rayleigh Number To Describe Interdendritic Convection During Directional Solidification Of Hypoeutectic Pb-Sb And Pb-Sn Alloys, Surendra N. Tewari, R. Tiwari

Chemical & Biomedical Engineering Faculty Publications

Based on measurements of the specific dendrite surface area (S-nu), fraction of interdendritic liquid (phi), and primary dendrite spacing (lambda(1)) on transverse sections in a range of directionally solidified hypoeutectic Pb-Sb and Pb-Sn alloys that were grown at thermal gradients varying from 10 to 197 K cm(-1) and growth speeds ranging from 2 to 157 mum s(-1), it is observed that S-nu = lambda(1)(-1) S*(-0.33) (3.38 - 3.29 phi + 8.85 phi(2)), where S* = D-l G(eff)/V m(1) C-o (k - 1)/k, with D-l being the solutal diffusivity in the melt, G(eff) being the effective thermal gradient, V being the …

Evaluation Of Methods To Protect Water Quality In Karst Areas: Phase I, Jennifer Webster, Dhandayudhapani Ramalingam, Sudhir Palle

Kentucky Transportation Center Research Report

The primary focus of this report is two-fold; to provide a literature review on what has been previously learned about highway runoff in relation to karsts aquifers and to characterize a karsts highway site in Kentucky that can be used to evaluate a variety of best management practices. From research findings, the main sources of pollutants in highway runoff came from vehicles, atmospheric fallout, and precipitation. The behavior of pollutants and their interaction with the environment can dictate where they will be found and how to best minimize their effects. Although it would seem that traffic volumes would greatly influence …

Fact Sheet #2: Do I Need A Npdes Permit For My Livestock Or Poultry Operation, Richard K. Koelsch

Department of Agricultural and Biological Systems Engineering: Presentations and White Papers

New U.S. Environmental Protection Agency (EPA) rules that took effect April 14, 2003 indicate that animal feeding operations (AFOs) can be defined as concentrated animal feeding operations (CAFOs) and required to obtain a National Pollutant Discharge Elimination System (NPDES) permit from the EPA or a designated state permitting authority. The likelihood of an AFO being classified as a CAFO will depend, in large part, on whether that operation is considered to be large, medium, or small.

Winter Operations, Abrasives And Salt Brine, Geza Pesti, Yu Liu

Nebraska Department of Transportation: Research Reports

The primary objective of winter maintenance operations is to improve traffic safety and efficiency during winter storm periods. Abrasives and salt brines have been successfully applied to increase traction and prevent snow and ice from bonding to road surface. However, because of some undesired side effects, such as corrosion and damage to the environment, salt and abrasives may need to be supplemented by other substances in some areas. Powerful non-corrosive acetate-based chemicals have been considered by several agencies, but their high price has limited their use. Recent research has focused on the use of new, less corrosive, and highly effective …

Configuration For Micro Ph Sensor, Young-Jin Kim, Young-Chul Lee, Byung-Ki Sohn, Chang-Soo Kim, Jung-Hee Lee

Electrical and Computer Engineering Faculty Research & Creative Works

A fully integrated pH sensor with a built-in reference electrode is proposed. An iridium oxide microelectrode and a pH-insensitive field-effect transistor are used as a pH sensor and a reference electrode, respectively. The sensitivity of the proposed device matches well with the estimated value to within 0.3 mV/pH deviation.

Electromagnetic Compatibility Issues In Mobile Computing, Antonio Orlandi, James L. Drewniak

Electrical and Computer Engineering Faculty Research & Creative Works

No abstract provided.

On The Mechanical Response In A Thermal Barrier System Due To Martensitic Phase Transformation In The Bond Coat, Anette M. Karlsson

Mechanical Engineering Faculty Publications

Recentstudies have shown that Pt-aluminide—a common bond coat material inthermal barrier coatings—undergoes martensitic transformations during thermal cycling. The transformationsare associated with both large transformation strain and a strainhysteresis, leading to accumulation of a mismatch strain. Thermal barriersystems based on Pt-aluminide bond coats are susceptible to interfacialmorphological instabilities. In this study, we investigate how the cyclicmartensitic transformation influences the morphology. Two key results are: (i)the morphological instabilities are highly sensitive to the thermo-mechanical propertiesof the substrate due to the martensitic transformation; (ii) thehysteresis associated with cyclic martensitic transformation cannot drive the morphologicalinstabilities; the strains associated with the formation of the thermallygrown …