Digital Commons Network^™

Oxidation Of N,N-Dimethylformamide And N,N-Dimethylacetamide In A Photoreactor, Su-Jen Syu

Theses

Oxidation of N,N-dimethylformamide(DMF) and N,N-dimethylacetamide(DMA) was investigated in a 30 liter semi-batch reactor. Five reaction processes were studied by using UV alone, O₃ alone, O₂/UV, O₂/O₃/UV and H2 O₂/UV respectively. Mathematical models have been developed to interpret the reaction kinetics. Reaction rate constants and mass transfer coefficients were determined by using Rosenbrock Hillclimb optimization algorithm. The experimental data and the predicted results from the models were compared. The kinetic parameters obtained from the previous semi-batch modes were applied to the continuous stirred tank reactor (CSTR) system. Results of this work show …

Closed Loop Machining In Precise Turning, Ching-Song Wei

Theses

Closed loop machining (CLM) is one of the most reliable ways to automate tool setting, part positioning and measurement on CNC machine tool. It not only can assure the quality of the product but also can improve the productivity of the machine. This paper describes the CLM from basic turning concept to application of CLM, including the feature of Mark Century 2000T and the programming methods in precise turning.

The hardware and software requirements for CLM system were presented. The algorithm for CLM programs was developed completely with a series of flow charts. Then, on the base of two projects, …

The Fast Fourier Transform In Assembly Languages Of Microprocessor 68000 And Microcontroller 8052, Hari Kumar Baldawa

Theses

In this report, the 256 point radix-2 FFT algorithm is written in assembly languages of microprocessor 68000( or 68008) and microcontroller 8052( or 8051). The data used can be upto 30 bits, of which the least significant 12 bits are assigned for fractional part.

The FFT code in assembly of 68000 is written for Sinclair's QL-100 personal computer with 68008 CPU. The SuperBASIC programs are used to access and test the performance of FFT code. The average time of execution falls between 0.3 to 0.4 seconds for 256 discrete points.

Again, same FFT algorithm is written in assembly language of …

The Evaluation Of The Ti-Speech System On Pc Computer, Ying Wu

Theses

A PC-TI-SPEECH system has been set up by the author of this thesis on the IBM PC/AT compatible computer. The basic functions of the system are as follows: data acquisition, internal signal synthesization, signal processing and speech recognition. The system is built up by a PC, TI-Speech Hardware kit, MADCAP software package,TI-Speech Tool kit. This thesis covers the setup, evaluation and operations of the complete PC-TI-SPEECH system, development of the system for further applications, and operations of running some evaluation programs generated by doing this thesis.

Optimizing Tone Production On A 300 Spot Per Inch Laser Printer, James R. Hamilton

Theses

Digital halftones as output on plain paper are the focus of this study. A new terminology is suggested to allow proper description of digital halftones. The most important of these terms is the use of "addressability" to replace the often misused term "resolution." Also important is the use of the term "spot" rather than "dot" to describe addressability. A means of properly describing digital halftones is suggested to avoid confusion with analog (ie., conventional photographic) halftones. Halftone patterns were created to test the efficiency of different designs at 300 spot per inch addressability on a laser printer. The page description …

N-Values And Paper Opacity, Robert Eric Aronson

Theses

The n-value is a factor which allows the Murray-Davies equation to be correctly solved for physical dot area or tint density. This equation becomes known as the Yule-Nielsen equation when the n-value is used.

Many variables affect the value of n; paper characteristics, screen ruling, even the equation variables themselves. The level of solid ink density may have a very significant effect on the n-value. This fact, although suspected, has not been investigated until now.

A study into this variance was undertaken in Appendix II with a method for adjusting the value of n to a standard solid ink density …

Production Effects Of Biotechnology In The Dairy Industry: An Exploratory Study, Kenneth L. Schurter

Theses

Genetically engineered products are being produced at an economical level. products is bovine sornatotropin. One of these Injections of bovine sornatotropin increase milk yield in dairy cattle. This increase in production per cow is consistent with the thirty year trend of fewer dairy farms, fewer cows, and more milk per cow.

Starting in the 1950's in the mechanical era, farmers went from horses to tractors. In the chemical era, herbicides and fertilizers started being used. Now in the 1980's the technical era is coming in to existence . Through all of these era's there was controversy. Each of these era's …

A Faster Way: A Recommendation To Machinery And Equipment Appraisers, Gerald L. Huether

Theses

Unavailable.

Research And Development Of An Abc Book Of Thinking Skills With Caldecott Books For Primary Students, Edythe Bernhardt

Theses

The goal of A1erican education today is to develop the thinking ability of children to enable them to learn even after leaving school. Because of an increasingly complex, ever-changing, problem-ridden world, creative thinkers and problem solvers are needed today more than ever before.

The purpose of the project was to research and prepare appropriate materials to develop thinking skills in primary aged children, kindergarten through grade three. The thinking skills were combined with quality children's literature, the Caldecott Award winning books, in activities which teach children to think and motivate them to read excellent children's literature . These activities were …

Cview, A Graphical Program Generator For The C Programming Language, Walter E. Martin

Theses

The electronics industry has long been a user of graphical design aids. Graphical design tools for VLSI circuits are used to lay out the design, generate data structures for the simulation of the circuit and eventually produce the photomasks for the production of the chip. As such these tools form a working environment that allows an engineer to design, debug and produce a final product. Software design, in general, is still done by writing individual lines of code. At best a macro language or a meta-language will be available to ease the pain of detail coding. While these tools are …

The Controlled Shutdown Of A Hydraulic Servo-System Using Acceleration Feedback, Mark Jolly

Theses

Hydraulic servoactuators have long been used in industry where high performance precision motion control is required. Because of their precision and ability to generate large forces, applications are numerous in industry. One such application provides cockpit motion for flight simulation. This thesis investigates a new emergency shutdown (abort) scheme for such high performance servo-systems. Because flight simulation involves the motion control of both man and machinery (a mock cockpit in motion), it will be used as the standard by which a safe and effective abort is modeled. The justification for motion abort during actuator operation is unsafe actuator accelerations. In …

B-Spline Surface Techniques For Solid Modeling An Application To Computer-Aided Geometric Design, Chi-Ming Tang

Theses

One important area of Computer-Aided Geometric Design (CAGD) is concerned with the approximation and representation of the surfaces of solid objects. Accurately describing the shape of an object so that the description is useful to designers who must decide how to manipulate it is an important problem. B-spline techniques promise greater versatility in describing complex surfaces than other techniques, thus the B-spline surface is highlighted in the field of constructive solid geometric modeling. A method for drawing complex surfaces by using B-spline techniques is presented. The tensor product surface scheme is developed for constructing sculptured surfaces. Also, the basic principle …

A Modified Extended Kalman Filter As A Parameter Estimator For Linear Discrete-Time Systems, Bruno Johannes Schnekenburger

Theses

This thesis presents the derivation and implementation of a modified Extended Kalman Filter used for Joint state and parameter estimation of linear discrete-time systems operating in a, stochastic Gaussian environment. A novel derivation for the discrete-time Extended Kalman Filter is also presented. In order to eliminate the main deficiencies of the Extended Kalman Filter, which are divergence and biasedness of its estimates, the filter algorithm has been modified. The primary modifications are due to Ljung, who stated global convergence properties for the modified Extended Kalman Filter, when used as a parameter estimator for linear systems.

Implementation of this filter is …

The Representation Of Symmetric Patterns Using The Quadtree Data Structure, Lucia Lodolini

Theses

Hierarchical data structures for image representation have been widely explored in recent years. These data structures are based on the principle of "recursive decomposition" of an image region. The most commonly mentioned picture data structure for two-dimensional data is referred to as a "quadtree". The purpose of this thesis is to investigate the use of a general quadtree scheme as a means of representing symmetric images. Specifically, images are generated according to the rules of selected two-dimensional plane symmetry groups.

An Alternative Language Interface For The Mistress Relational Database Patterned After Ibm's Query-By-Example, Susan C. Vogel

Theses

This thesis effort developed a user-oriented query language interface, patterned after IBM's Query-by-Example, for the Mistress relational database. The interface, Mistress/QBE, is written entirely in C and uses the UNIX curses library of subroutines to allow full screen input and output. Mistress /QBE allows the user to issue commands to draw pictorial representations of tables which exist in the database. The user then enters values and operators into the tables to specify a query by indicating attributes to be used in conditional selections, sort and grouping orders, and output formats. Mistress /QBE decodes the information entered on the screen and …

An Experimental Characterization Of The Tensile Behavior Of Polystyrene, Louis T. Loggi

Theses

The characterization of polymeric materials involves many different tests which often depend upon the ultimate environment for the end product. One important area for many engineering applications is that of mechanical testing. Although the evaluation of tensile properties ranks as the most common mechanical test, standard test methods can have serious shortcomings when applied to plastics. This work seeks to study test method variability by evaluating experimental data from uni -axial tension tests conducted on a typical high-impact polystyrene at room temperature. Two common methods will be used to obtain the strain data: extensometer transducer and foil strain gage. These …

Ada As A Design Specification Language, Barbara Brunner Gibson

Theses

The primary thesis objective is research into current approaches to design specification languages, emphasizing Ada. Requirements specification is touched upon. Design specification is explored and related to requirements and implementation. The role of language in design is discussed, as well as objectives of the design specification and features that a specification language should provide in order to meet those objectives. Formal language is contrasted with natural language. Some formal specification languages are described, both Ada related and not Ada related. The secondary objective, the thesis project, is to illustrate a design specification in a formal language, Ada. The purpose of …

A System For The Generation Of Tonal Music Based On Transformations, Karl J. Myers

Theses

Most if not all of the approaches being used in the computer study of natural languages also have been applied to the computer study of music. Music theorist Heinrich Schenker (1867 - 1935) developed a system for the study of tonal music that is compatible with the transformational grammars defined by linguist Noam Chomsky for the study of natural languages. Steven Smoliar ( 1980 ) defined transformations, based on Schenker’s theory, for the analysis of musical compositions. This study provides background into the application of grammars in the generation of musical compositions and a full implementation of the transformations defined …

Variable Size Block Truncation Coding With Adaptive Bit Plane Omission For Image Compression, Hieu T. Pham

Theses

A modified version of the Block Truncation Coding (BTC), which is a non-information preserving image compression technique, is studied. The first modification is the introduction of variable block sizes to the standard BTC technique. The second modification is the adaptive omission of bit planes. Threshold selections for this modified BTC technique are analyzed in the context of the human visual system. Modified BTC techniques are compared against the standard technique from the point of view of visual image quality and compresion efficiency.

Computer Aided Design Of Multiple Pulley Timing Belt Drives, Gary Matson

Theses

The design of timing belt drive systems involves determining the belt width and belt length. The length of the belt is a geometry problem which requires summing the tangent lines and the arcs comprising the pitch line. The width of the belt is determined by the required loads. A computer program is developed in this project to automate the timing belt design process. The program comes in three versions. Each version chooses a target belt length, moves a specified pulley to achieve that length, then calculates the minimum belt width. The three versions of the program are the batch version, …

Modal Analysis Of A Computer Disk Drive, Michael G. Thurston

Theses

The normal (real) modes of a Winchester type hard disk drive were determined in the frequency range 0-2200hz. Two methods of analysis were used in order to allow cross-correlation of the results. Experimental modal analysis was performed using Structural Measurement Systems' (SMS) Modal 3.0 analysis system and the requisite experimental hardware. A finite element analysis was also performed using MSC/NASTRAN; the NASTRAN model was created using the PATRAN pre-processing program. In order to alleviate the complications associated with matching the structural mounting conditions, a free-free analysis was performed using NASTRAN, and a light string was used to free mount the …

An 8085 Microprocessor Based Monitor System For A 750 Cc Honda Motorcycle, Robert H. Leet

Theses

This system replaces the analog speedometer and tachometer gauge cluster of a 750 cc Honda motorcycle with a computerized monitor system based on the INTEL 8085A microprocessor and family of peripherals. The system adds the enhanced functionality of engine temperature, battery charging, fuel level, turn signal, and kick stand monitoring and status display. A security function is also employed as a guard against unauthorized use or theft. The speedometer and tachometer functions utilize phototransistor sensors generating pulses derived from stock cable connections to the engine block and front wheel. The engine temperature, fuel level, and battery charging functions are implemented …

The Relationship Between Computer Interaction And Individual User Characteristics, Kathleen Lambert

Theses

Development of effective human computer interaction is being approached independently by two disciplines -- user interface design and computer aided instruction. The lack of communication between the two fields has left each separately pursuing different paths toward the same goals. This thesis attempts to bridge the gap between these two disciplines. An exploratory study was conducted to analyze whether user choices in a computer aided instruction environment and personality types as defined by the Myers-Briggs type indicator are related strongly enough to provide the basis for future user models. The results demonstrated that no single instructional strategy was preferred, implying …

Analysis Of The Die Casting Process By Design Of Experiments, Gary C. Ward

Theses

Not Included

Graphical Programming System For Dataflow Language, Jyun-Jier Roland Jehng

Theses

Dataflow languages are languages that support the notion of data flowing from one operation to another. The flow concept gives dataflow languages the advantage of representing dataflow programs in graphical forms. This thesis presents a graphical programming system that supports the editing and simulating of dataflow programs. The system is implemented on an AT&T Unix^TM PC.

A high level graphical dataflow language, GDF language, is defined in this thesis. In GDF language, all the operators are represented in graphical forms. A graphical dataflow program is formed by drawing the operators and connecting the arcs in the Graphical Editor which …

Approximate Methods For Analysis And Design Of Channel And Tee Shaped Reinforced Concrete Columns Under Axial Compression And Biaxial Bending, Chayan Bhattacharyya

Theses

Combined Bending and Axial Compression for irregular shaped (such as L-shaped, Channel shaped, T-shaped) reinforced concrete short column is a common design problem. Current code provisions and the available design aids do not offer an insight into the determination of strength and ductility of biaxially loaded reinforced concrete columns. The reason is that the information on the behavior of irregular shaped reinforced concrete members under combined biaxial bending and axial load is not well known. They are usually overdesigned and this may cause the structure to be stiffer, which may result in loss ductility when applied to seismic regions. Thus …

Microprocessor Controller For A Multi-Targets System, Shoeineng Lin

Theses

This thesis presents a microprocessor controller for a multi-targets system, which is designed by a direct digital control in the modern computer-aided manufacture system. It is made up of digital control theory, computer hardware configuration and software algorithm. An example is illustrated by IBM PC/XT computer. In this example, the control laws of three simple targets are developed and implemented by C-language. Simultaneously, the computer self-test routines, such as CPU, ROM etc, are developed by intel-8088 assembly language.

Application Of Computer Techniques In Groundwater Contamination Studies, Komratchi Raman

Theses

A study has been undertaken to provide insight into two related aspects of groundwater contamination studies - contaminant transport behavior and its analysis by modeling techniques. The study reviews recent research that explains some of the uncertainties in the transport and fate of chemical contaminants in groundwater. Approaches to modeling techniques and data reduction are developed to illustrate their usefulness in analysing existing groundwater data, and to make predictions on the future water chemical characteristics. Three types of study areas have been chosen for this purpose, each representing a different type of groundwater contamination problem. The first study area has …

Robotization For Assembling Small Parts, Frank J. Valese

Theses

The thrust of this paper is directed toward establishing a roboticized small parts assembly line where none currently exist. Technical and pragmatic requisites were established and reviewed prior to installing the proposed robotic workcell. Although the specific model chosen for discussion is the locksmithing industry, the procedures followed, the design tools utilized, and the methods of job-costing employed apply equally to other small parts industries.

Basic industrywide considerations reviewed for each robotization effort included:

1. Choosing the proper application for robotization
2. Obtaining management support and labor input to insure the success of the project
3. Deciding on the economic and production goals …

A Mathematical Analysis Of An Electronic Dot Generating Scanner For Dot Resolution And Tone Reproduction, Frederick K. Waechter

Theses

An electronic dot generating scanner is a complex machine. This complexity is based in the photographic methods which the scanner is designed to duplicate. This study addresses the mathematical principles of the entire scanner system. This paper was intended to provide an improved understanding of the scanner system. The hypothesis states that a mathematical analysis with experimental verification can be developed to accurately model the internal optics, tone reproduction, and output dot characteristics of an electronic dot generating scanner. The analysis begins with a functional block diagram, which shows the information flow through the scanner. This diagram breaks the process …