Engineering Commons^™

Digital Filtering With The Iapx 86/20, Robert E. Canright

Retrospective Theses and Dissertations

The iAPX 86/20 (8086 with the 8087 numeric coprocessor) is considered for digital filtering. The advantage in using the iAPX 86/20 lies in the 80-bit width of the 8087 floating-point arithmetic-registers. With such large arithmetic registers, the effects of coefficient roundoff and arithmetic roundoff errors on the filter output are reduced. The price paid for the improved numerical performance is the increased time spent by the system moving data to and from memory. The method of Knowles and Olcayto for measuring the effect of coefficient roundoff is studies in detail. This method is applied to an example filter in order …

Design Of A Single User Deconcentrator For A Conferenced Voice Communication Circuit Switching System, Ming-Yung Wen

Retrospective Theses and Dissertations

A single user deconcentrator is designed for a circuit switched digital switching system which emphasizes mass conferencing. The switching system consists of distributed concentrators which include a first level of conferencing and a broadcast bus which includes a second level of conferencing. The deconcentrator features volume adjustment of individual conferences as well as a third and last level of conferencing- a conference of the individual conferences obtained from the broadcast bus. The design identifies the MSI and SSI components of the deconcentrator and provides an estimate of timing and board size. An alternative volume adjustment algorithm and the extension of …

Acuta Enews October 1983, Vol. 12, No. 10

ACUTA Newsletters

In This Issue

PARTY LINE

PRESIDENT'S MESSAGE

FREE PUBLICATION

ACCESS CHARGES CAUSE ANGER, DISMAY

THE BREAKUP OF AT&T IS A MONUMENTAL BLUNDER

THE SEVEN REGIONAL BELL OPERATING COMPANIES, JANUARY 1, 1984

FUTURE OF PHONE SERVICE CONCERNS BEREUTER

TAKING CONTROL OF AUTOMATION

BITS & PIECES

COMPUTER, CORRESPONDENCE COURSE PAIR UP IN 'ELECTRONIC UNIVERSITY'

Development Of Pavement Thickness Designs Using Pozzolanic Base Materials, Gary W. Sharpe, Herbert F. Southgate, Robert C. Deen

Kentucky Transportation Center Research Report

With the escalating costs of materials and construction for highways and streets, many agencies chargedwith the repsonsibility of designing and constructing highwyas are utilizing by-product materials. One application of by-product materials has involved the use of stabilized aggregate bases where pozzolanic materials are used as a stabilizing agent.

The use of pozzolanic materials is not new. However, the use of pozzolanic materials is relatively new to Kentucky. This may be primarily attributed to the availability o an abundant supply of economical aggregate materials. However, as costs of production and processing of aggregate materials have increased, so has the feasibility of …

Survey Of Guardrail End Treatment Usage, Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

Whenever a guardrail terminates within the "clear zone," a crashworthy end treatment is required. To be crashworthy, the end-treatment should not spear, vault, or roll a vehicle during a head-on impact while maintaining vehicle decelerations below recommended limits. As a means of determining types of end treatments currently used in various states and criteria to determine what type to use, a survey letter was sent to each state.

It was found that, generally, the preferred method to use to end roadside steel beam guardrail is to bury the end in a cut slope. When this is not feasible, either a …

Evaluation Of Asphaltic Pavements For Overlay Design, Robert C. Deen, Herbert F. Southgate, Gary W. Sharpe

Kentucky Transportation Center Research Report

To evaluate projects involving approximately 200 route-miles of interstate and primary pavements in Kentucky and Tennessee in relatively short time frames, it was decided to test, analyze, and design overlays using test equipment (Road Rater) and procedures developed by the University of Kentucky Transportation Research Program. This paper presents the analysis methodology and the evaluation and overlay designs for selected projects, including the before-and-after analysis of milling on one project.

The Road Rater applies a dynamic sinusoidal loading of known force and frequency. The velocity of the vibration waves are measured by sensors and integrated electronically to obtain surface deflections …

Concrete Barrier Geometrics (Us-41 Bridge In Henderson, Kentucky), Kentucky Transportation Research Program

Kentucky Transportation Center Research Report

The bridge railing constructed on the approaches to the US-41 northbound bridge over the Ohio River at Henderson, Kentucky, is not in conformance with specifications The vertical face was constructed to be an average height of 4 3/4 inches above the pavement surface rather than the specified 3 inches. From the top of the vertical face, the barrier conformed to a standard New Jersey barrier. However, this meant the intersection between the two sloping surfaces was 14 1/2 inches rather than 13 inches above the pavement surface.

An analysis was conducted to ascertain whether the in-place barrier walls (bridge rail) …

Center For Science And Engineering Schedule Of Classes Fall 1983, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Models For Economic Evaluation Of Flexible Manufacturing Systems, Daniel P. Salomon

Retrospective Theses and Dissertations

The current methods of economic justification are not suitable for identifying the benefits of automated manufacturing systems. This study is an introduction to Flexible Manufacturing Systems (FMS), its main features, and the economic benefits that can be expected. The models are designed to perform the following analyses: 1. Analysis of direct cost savings. 2. Analysis of the impact of incremental implementation on capital recovery costs. 3. Analysis of the cost effects of improving machine utilization and reducing manufacturing lead time. 4. Sensitivity analysis of the after-tax equivalent uniform annual cost of a FMS and a conventional system. The models are …

Testing Of Active Feedback Applied To Piezoelectric Devices, William H. Barrow

Retrospective Theses and Dissertations

The purpose of this research is to test a unique implementation of active feedback applied to a low frequency piezoelectric transducer. Understanding that active feedback can be used to shape the frequency response of an electrical system a method for applying active electroacoustical feedback will be used to obtain a wider acoustical bandwidth in a piezoelectric transmitter. By applying active feedback to a resonant device its bandwidth was increased by a factor of 2.5. This is a significant improvement for applications where minimum electrical phase shift versus frequency is desired.

On The Theory And Experimental Results Of A Sensitive Fiber Optic Laser Accelerometer, Steven C. Furlong

Retrospective Theses and Dissertations

No abstract provided.

Application Of Ground Penetrating Radar To The Detection Of Subsurface Cavities, Gary L. Kuhns

Retrospective Theses and Dissertations

Ground Penetrating Radar (GPR) identifies subsurface features by distinguishing materials with different dielectric constants and electrical conductivities. Subsurface cavities can, therefore, be detected by the variation in their electrical properties from the electrical properties of the surrounding material. To test the cavity detection ability of GPR, subsurface cavities of varying size, shape and content were modeled. Radar response to the cavity models was found to be affected by the composition of the surrounding soil material, the depth of the groundwater table, and the radar signal frequency. Based on knowledge gained from the cavity modeling study, a natural subsurface cavity was …

H & V News

Building Services Engineering

No abstract provided.

Bulletin Ma 20 - Sheep Yard Plans - Flocks Up To 500, D. Bicknell

Animal production and livestock published reports

Manjimup Regional Office

Owners of small flocks often use much more labour per sheep than do owners of large flocks. Most of the difference in labour use is the design of sheep sheds and sheep yards, and a smaller affect from the mob size and experience in handling sheep.

This booklet gives some detail on design and construction of yards and a number of yard plans to handle up to 500 or so sheep. Many of the plans are from an Australian Wool Corporation publicatiot1 "Wool Harvesting Notes".

Circuit Analysis Of A Gas Flow Switch, Teri Marie Owens

Electrical & Computer Engineering Theses & Dissertations

The circuit analysis of a gas flow switch is presented. The objective of the analysis is to model the switching process during spark gap breakdown. This information is useful in understanding switch operation and identifying ways to improve switch performance.

A lumped circuit model is used to describe a gas flow switch during the switching process. Certain circuit element values are determined experimentally through static tests. Other component values, including a time-varying switch resistance and inductance, are estimated from current measurements. In particular, unknown constants in expressions for gap resistance and inductance are determined using an iterative parameter estimation technique. …

Experiments On Melting Around An Isothermal Horizontal Cylinder Under Computer Control, Timothy Moore Rothgeb

Mechanical & Aerospace Engineering Theses & Dissertations

The melting of a solid around an isothermal horizontal cylinder is a physical phenomenon which must be understood when attempting to design a latent heat storage system. The desire to design such a system is the motivating factor in this research. To gain this understanding of the fundamental melting processes several experiments were designed, and two sets of Stefan and Rayleigh number experiments were undertaken. Experiments were also performed to determine the properties of the paraffin that was used in these investigations. During the investigations of the melting processes, the temperature was measured at several locations throughout the liquid and …

Design Of Efficient Algorithms Through Minimization Of Data Transfers, Yong Mo Chong

Electrical & Computer Engineering Theses & Dissertations

This thesis explores the time optimal implementation of computational graphs on a finite register machine. The implementation fully exploits the machine architecture, especially, the number of registers. The derived algorithms allow one to obtain time efficient implementations of a given graph in machines with a known number of registers.

These optimization procedures are applied to digital signal processing graphs. It is shown that the regular structure of these graphs allows one to identify computational kernels which, when used repeatedly, can cover the entire graph. The l- and r-register implementations of Hadamard and Fast Fourier Transforms using various computational kernels are …

Kinetics Of Biodegradation Of Phenol And 2,6-Dichlorophenol, Samir Shrikant Desai

Theses

Biological removal of phenol up to 600 ppm and 2,6-dichlorophenol up to 20 ppm was studied in a well aerated fill-and-draw reactor of 41 capacity at 26 C using an activated sludge obtained from the municipal treatment plant in Livingston, N.J. Experimental evaluation of kinetic parameters showed that biodegradation of both phenol and 2,6-DCP followed zero-order kinetics. As expected, the lag time for both compounds was considerably reduced when acclimated sludge was used. However, the metabolism of 2,6-DCP was very slow even for preacclimated sludge, requiring about 36 hours to degrade only 15 ppm.. This was markedly improved by the …

Mathematical Model Of Temperature Profiles And Coking In A Crude Oil Heater Tube, Joseph C. Polimeni

Theses

A mathematical model to predict temperature profiles and coking of crude oil in furnace tubes is presented. The model assumes that the coking mechanism is due to a reaction in the laminar sublayer, whose rate depends upon the temperature profile. That profile is obtained by a numerical solution of the appropriate transport equations, with velocity profiles that may be laminar or turbulent, and including the temperature dependence of the crude oil properties. In addition, velocity and temperature profiles were adjusted when necessary to ensure closure of the heat and material balances. As a by-product of this study, a correction was …

Preparation And Characterization Of Blocked Diisocyanate Monomers For Dental Applications, Stephen Richard Angeli

Theses

Six new monomers were prepared and characterized. The six monomers are blocked diisocyanate compounds. In the preparation 2,4-tolylene diisocyanate was first blocked with 2=hydroxyethyl methacrylate in the para NCO position. Six different blocking agents were then used to block the ortho NCO in the preparation of the monomers: (1) p-methoxyphenol, (2) m-methoxyphenol, (3) o-methoxyphenol, (4) p-chlorophenol, (5) m-chlorophenol, and (6) o-chlorophenol. The six monomers were characterized by mp, liquid chromatography, IR, NMR, and elemental analysis. All the characterizations show that the monomers are indeed the desired products.

Experimental Investigation Of An Axisymmetric Air Jet Impinging On A Flat Plate, Saibal Basu

Theses

Experimental investigation was carried out on a circular, submerged, axisymmetric turbulent air jet-with normal impingement on a smooth, flat, square lucite plate, The flow was considered to be incompressible because the velocity of the jet was not too high, with Mach Number of the order of 0.3. Three nozzle diameters of 0.375" (9,525 mm), 0.250" (6.35 mm) and 0.125" (3.175 mm) were used with Reynolds number ranging from 7,000 to 70,000.

Various flow parameters were measured to obtain the velocity and pressure distributions at the surface of the flat lucite plate and along the centerline of the normal impinging air …

The Quasisteady Approach For Thermal Analysis Of Frost Action Below Refrigerated Warehouses, Milan Kumar Bag

Theses

The quasisteady method of analysis has been used to determine the frost depth below refrigerated warehouses. For the case when the ground temperature is different from phase change temperature, the solution is obtained by numerical integration of the equation governing the phase change process. When the ground temperature approaches the phase change temperature closed form solution is obtained. The results obtained from the quasisteady method compare well with the experimental results. The results presented in this thesis should find use in the design of the refrigerated warehouses in the colder regions of the world.

Lifo Perishable Inventory (S,S,T) Model And Its Related Discount Policy, Yuan-Shyi Chiu

Theses

The objective of this thesis is to determine the optimal (s,S,T) ordering policy for a perishable inventory system with a fixed product lifetime and Poisson demand. The simulation technique is utilized to identify the optimal ordering policy which minimizes the total cost consisted of ordering, holding, shortage, and outdate costs. Upon the establishment of the optimal ordering policy, a discount policy on the outdating items is proposed to provide decision maker(s) with tradeoff between the profit and the average outdate cost.

The computer programs written in FORTRAN are designed to generate the optimal (s,S,T) ordering policy of any above-mentioned inventory …

An Experimental Investigation Of Round Normal Impinging Jet Of Water, Dipendra Saharay

Theses

The various flow parameters of round jets of water impinging normally on a flat plate are measured experimentally. The velocity and pressure distribution along the axis of the jet at various sections of the jet parallel to the horizontal lucite striking plate and along the impinging surface was found. The nozzles used were 1/4 inch and 1/2 inch in diameter. The Reynolds number based on the nozzle diameter was 15,000 to 25,000. The distance from the jet origin to the deflecting boundary ranged from thrice the diameter of the jet to twelve and sixteen times the diameter of the jet. …

The Lewis-Matheson Method On Computer, William Raymond Castner

Theses

Lewis and Matheson, in the early 1930's, developed a manual calculation technique for the solution of multicomponent distillation problems. The object of this study was to see if there would be any advantage to using the Lewis-Matheson method, once incorporated onto a computer, over current multicomponent distillation solution techniques. The immediate advantage of using the L-M technique is that it requires fewer preliminary calculations than other computer methods. It was found that the L-M technique uses about half the execution time of a typical Newton-Raphson program, while using only one tenth the computer core (memory). This was not intended to …

Deposition Of Particles In Horozontal Parallel Plate Channel Due To Image Charge, Inertia, Viscosity And Gravity, Chi-Young Chu

Theses

This investigation was made to determine the effect on the deposition of particle in a horizontal parallel-plate channel due to the influences of image charge, viscosity, inertia and gravity. The flow considered was lamina, incompressible and steady. The flow patterns considered were uniform and fully developed with symmetry about the axis of the channel.

The governing equations derived for a particle were based on Newton's Second Law of motion. Since the resulting governing equations are linear second order differential equations, Runge-Kutta algorithm is used to solve the problem and graphical techniques is used to interpret the results of the numerical …

Data Acquisition And Parameter Identification In Electro-Oculography, Wolfgang Poelzleitner

Theses

Electro-Oculography (EOG) is used in clinical ophthalmology to measure the time response of the corneoretinal potential (CRP) to changes in light intensity. An automatized data acquisition and system modeling link has been developed that significantly reduces processing time presently required for EOG. The data acquisition is performed on a microprocessor based instrument, which supervises the EOG-test, measures the potential and, after completion of the test, transfers the results to a mainframe computer. Parameter identification routines provide graphical representation and mathematical models for the CRP. Both nonlinear curve fitting methods and Least Squares System Identification schemes are used.

Acuta Enews September 1983, Vol. 12, No. 9

ACUTA Newsletters

In This Issue

PARTY LINE

FROM THE PRESIDENT

BOCS WILL BREATHE NEW LIFE INTO VOICE STORE AND FORWARD

ACUTA SERVICE AWARDS-- 1983

SLOW-SCAN BRINGS STUDENTS AND FACULTY TOGETHER IN UNIVERSITY OF HAWAII EXPERIMENT

RADIO OPERATORS USE SLOW-SCAN

TRANSMISSION FACILITIES A MUST

BITS & PIECES

Self‐Refraction Of Nonlinear Capillary‐Gravity Waves, Partha P. Banerjee, Adrianus Korpel, Karl E. Lonngren

Electrical and Computer Engineering Faculty Publications

Self‐refraction effects have been observed during the propagation of deep‐water capillary‐gravity waves. The observations are shown to be in qualitative agreement with the theory of self‐focusing and defocusing in a cubically nonlinear medium in the presence of diffraction.

Child Safety Seat Usage In Kentucky After Enactment Of A Mandatory Usage Law, Kenneth R. Agent

Kentucky Transportation Center Research Report

The 1982 Kentucky General Assembly enacted a law requiring use of child safety seats for children 40 inches or less in height. To evaluate the effectness of this law, usage surveys had to be completed before and after the law became effective. This study summarizes data collected one year after enactment of the law and compares this with ''before" data.

One year after enactment of the mandatory usage law the statewide child safety seat usage rate was 22.7 percent. This compared to 14.4 percent usage before the law and represents a statistically significant increase. Usage increased in 18 of the …