<p>Downtime associated with fault isolation impacts the performance of any system to a significant degree. Few repairmen are well versed in the art of troubleshooting and experienced repairmen are not always available and/or are very costly. A failure diagnostic expert system provides an effective method of failure diagnosis.</p> <p> Diagnostic reasoning in expert systems is discussed with demonstrating methodologies by using a 1.6 liter, 1981 model Volkswagen Vanagon as an example. A procedure and methodology for building a diagnostic case base is demonstrated by building a Volkswagen Vanagon diagnostic case base. A significant diagnostic case base was developed in order to demonstrate and evaluate the appropriateness of CBR Express for failure diagnosis. CBR Express is a case-based matching application from Inference Corporation.</p> / Master of Science

<p>A unified and consistent design procedure is proposed for column base anchorages loaded in shear and tension. A literature review of previous work was done to identify discrepancies. A design procedure for anchorages loaded in shear, tension and combined shear and tension was developed which attempted to coordinate c;lnd resolve the discrepancies in previous work. A design methodology utilizing shear lugs was developed. The overall design procedure is for column bases loaded in shear and tension and uses two design methods:</p> <p>Method 1: Headed anchor bolts are used to resist both shear and tension loads.</p> <p> Method 2: A shear lug welded to the bottom of the base plate resists shear loads and the headed anchor bolts resist only tension loads.</p> <p>The proposed design method differs form the design method used by Shipp and Haninger (Reference 23) as follows:</p> <p> 1. The proposed procedure incorporates both shear and tension design stress based on the ultimate strength of the anchor bolts times a reduction factor.</p> <p> 2. Separate capacity reduction factors are introduced for shear and tension.</p> <p> 3. The use of shear lugs is incorporated in the proposed design.</p> <p> 4. The incorrect use of the "shear-friction" concept is noted and not used in the design.</p> <p> 5. The safety factor for the required embedment depth is applied to the projected area of the failure cone not the embedment depth of the bolt.</p> <p> Several design examples are presented using the two methods. A computer program (using Microsoft QuickBasic 4.0) has also been developed using the proposed design procedure.</p> / Master of Engineering

Master of Science in Education

see document / Master of Urban Affairs

<p>A review of the petitioning process and informational requirements was compiled to assist owners/operators of Resource Conservation and Recovery Act (RCRA) facilities in obtaining a variance from the Land Disposal Restrictions Program.</p> <p> A discussion of the RCRA legislative intent of the Land Disposal Restrictions Program as it applies to no-migration variances and the types of facilities the Environmental Protection Agency (EPA) considered likely candidates are provided.</p> <p> A checklist of the required information for a technically complete petition also is included.</p> / Master of Science

Master of Science

Master of Science

see document / Master of Science

see document / Master of Engineering

Master of Science in Education