Physical Sciences and Mathematics Commons^™

Towards The Integration Of Object-Oriented Constructs Within Structured Query Language (Sql), Paul Francis Rabuck

UNF Graduate Theses and Dissertations

This paper explores the possibility of coupling SQL with a semantic data model. For this study, the primary objective was to build a working prototype of a program that allows a database designer to define data objects and their respective interrelationships using the Object-oriented Semantic Association Model (OSAM*).

The prototype isolates from the designer the low level commands (i.e., CREATE TABLE, CREATE INDEX) which comprise the SQL data definition language (DOL). Once the objects are defined by the designer, the prototype generates the relational database table definitions without the designer having to directly use the SQL DOL.

System Design Quality And Efficiency Of System Analysts: An Automated Case Tool Versus A Manual Method, Satomi H. Sugishita

UNF Graduate Theses and Dissertations

The purpose of the current research study is to find out if CASE tools help to increase the software design quality and efficiency of system analysts and designers when they modify a system design document. Results of the experimental data analysis show that only the experience level of subjects had an effect on quality of their work. Results indicated that the design methods, either CASE tools or manual, do not have a significant effect on quality of the modification task nor the efficiency of system analysts and designers.

A Comparison Of Text And Graphics As Effective User Interfaces In A Proposed Advanced Train Control System, Kenneth A. Organes

UNF Graduate Theses and Dissertations

This study tested the effectiveness of three screen interface formats for use in a proposed on-board computer to be used as part of an advanced train control system. One of the three formats contained only graphic depictions of the data, one contained only textual representations and the third had a mixture of graphic and textual data.

Twenty-eight subjects with varying railroad experience were recruited for the experiment. They were divided into three groups, each of which was presented with a simulation using one of the three interface types. The simulations depicted possible engine, track and train conditions that might be …

The Group Spreadsheet, George Francis Morrissey Jr.

UNF Graduate Theses and Dissertations

Groupware is fast becoming an important part of the computing world. This thesis reviews past history and research in which a group oriented spreadsheet is shown to have a real purpose in today's business world. A group oriented spreadsheet was implemented using a public domain package called The Spreadsheet Calculator. Spreadsheet users and programmers tested the implementation. The results and conclusions of this implementation are also presented.

Regression Trees Versus Stepwise Regression, Mary Christine Jacobs

UNF Graduate Theses and Dissertations

Many methods have been developed to determine the "appropriate" subset of independent variables in a multiple variable problem. Some of the methods are application specific while others have a wide range of uses. This study compares two such methods, Regression Trees and Stepwise Regression. A simulation using a known distribution is used for the comparison. In 699 out of 742 cases the Regression Tree method gave better predictors than the Stepwise Regression procedure.