UA Computer Science

<BODY background="../../../images/back1.gif" link="#AF0000" vlink="#3E3E3E" alink="#AF0000"><!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> <p> <table border=0> <tr> <td> <p><img src="susan2.jpg" align=left border=2 hspace=5 width=164 height=200></p> <h2>Dr. Susan V. Vrbsky</h2> <p>Associate Professor<br> Department of Computer Science<br> The University of Alabama<br> Phone: (205) 348-6363<br> Fax: (205) 348-0219<br> Email: <a href="mailto:vrbsky@cs.ua.edu">vrbsky@cs.ua.edu</a> </p> </td> </tr> </table> <hr> <h3>EDUCATION</h3> <ul> <li><strong>Ph.D.</strong> Computer Science, University of Illinois, 1992 </li> <li><strong>M.S.</strong> Computer Science, Southern Illinois University, 1983 </li> <li><strong>B.A.</strong> Sociology, Northwestern University, 1975 </li> </ul> <hr> <h3>EXPERIENCE</h3> <ul> <li><strong>Assistant Professor</strong>, Department of Computer Science, The University of Alabama, 1992-present </li> <li><strong>Research Assistant</strong>, Department of Computer Science, The University of Illinois, 1988-1992 </li> <li><strong>Lecturer</strong>, Department of Computer Science, Southern Illinois University, 1983-1986 </li> <li><strong>Teaching Assistant</strong>, Department of Computer Science, Southern Illinois University, 1981-1983 </li> <li><strong>Programmer/Analyst</strong>, Sorkin-Enenstein Research Services, Inc., Chicago, IL, 1979-1981 </li> </ul> <hr> <h3>CLASSES</h3> <ul> <li>CS 426 -- Operating Systems <ul> <li><a href=notes.htm>Class Notes</a> </ul> </ul> <hr> <h3>INTERESTS</h3> <ul> <li>Real-Time Database Systems </li> <li>Database Security</li> <li>Databases - temporal, object-oriented and federated </li> </ul> <hr> <h3>RESEARCH REVIEW</h3> <p>Dr. Vrbsky's recent research, sponsored by NSF, is in the area of real-time databases. She has designed and implemented an approximate query processor that produces monotonically improving approximate answers to database queries. Approximate answers can be used if there is not enough time to retrieve and process all of the data for a query or if all of the data are not available. The proposed temporal data model for approximate query processing addresses the timing constraints and the temporal consistency constraints of real-time databases. </p> <p> Another project involves the design of multilevel secure real-time database strategies which also consider the timing constraints and the temporal consistency constraints of real-time databases. The database security startegies are designed to trade off among the quality of the result, the time to process the result, the security and the temporal consistency of the data. These strategies are considered when exact answers are provided as well as when approximate answers are provided. The stratagies resulting from this work are applicable in may different settings and allow flexibility in securing real-time databases. </p> <hr> <h3>SELECTED PUBLICATIONS</h3> <ul> <li>Vrbsky, S. and S. Tomic, "Satisfying Timing Constraints of Real-Time Databases," to appear Journal of Systems and Software. </li> <li>Strickland, D. and S. Vrbsky, "Stopping Traffic: Discretionary Access Control in a Multidatabase System, " ACMSE, April 1997. </li> <li>Minor, E. and S. Vrbsky, "A Tightly Secure Object-Oriented Data Model Using both Discretionary and Mandatory Security Methodologies, " ACMSE, April 1997. </li> <li>Vrbsky, S., "A Data Model for Approximate Query Processing of Real-Time Databases," Data and Knowledge Engineering, Vol. 21 No. 1, Dec. 1996, pp. 79-102. <li>Jukic, N. and S. Vrbsky, "Feasibility of Aggregates in Time-Constrained Queries," Information Systems, Vol. 21 No. 7, Dec. 1996, pp. 595-614. <li>Jukic, N. and S. Vrbsky, "Temporal Aggregates for Time-Constrained Queries, " Proceedings ISMM - International Conference on Intelligent Information Management Systems, Washington, D.C., June 1996, pp. 5-11. </li> <li>Jukic, N. and S. Vrbsky, "Subject's Interpretation of Objects on Lower Security Levels," Supplement to Proceedings IEEE Symposium on Security and Privacy, Oakland, CA, May 1996. <li>Parrish, A., D. Cordes, S. Vrbsky, T. Camp, G. Fortner and G. Scales, "Assessing Computer Knowledge Among College Students," Journal of Computer Science Education, Vol. 10 No. 3, Spring 1996, pp. 9-14. <li>Jukic, N. and S. Vrbsky, "Aggregates for Approximate Query Processing," Proceedings ACMSE, April 1996, pp. 109-116. <li>Vrbsky, S. and J. Liu, "Producing Montonically Improving Approximate Answers To Database Queries," Imprecise and Approximate Computation, ed. by Swaminathan Natarajan, Kluwer Academic Publishers, 1995, pp. 117-133. </li> <li>Vrbsky, S. and N. Jukic "Analysis of Approximate Query Processing Overhead, " Proceedings ISMM - International Conference on Intelligent Information Management Systems, Washington, D.C., June 1995, pp. 21-25. </li> <li>Cordes, D., A. Parrish, and S. Vrbsky, "Breadth-Oriented Outcomes Assessment in Computer Science," Journal of Computer Science Education, Vol. 9 No. 3, Spring 1995, pp. 12-15. <li>Vrbsky, S. and J. Liu, "Producing Approximate Answers to Set-Valued and Single-Valued Queries, " Journal of Systems and Software, Vol. 17, 1994, pp. 243-251. <li>Vrbsky, S., "Approximate Query Processing of Temporal Data in Real-Time Databases," Proceedings ISMM - International Conference on Intelligent Information Management Systems, Washington, D.C., June 1994, pp. 34-38. </li> <li>Vrbsky, S. and J. Liu, "APPROXIMATE: A Query Processor that Produces Monotonically Improving Approximate Answers," Transactions on Knowledge and Data Engineering, Vol. 5 No. 6, Dec. 1993, pp. 1056-1068. </li> <li>Vrbsky, S. and J. Liu, "Producing Approximate Answers to Set-Valued and Single-Valued Queries with APPROXIMATE," Proceedings of the 1st Internation Conference on Information and Knowledge Management, Nov. 1992, pp. 405-412. </li> <li>Vrbsky, S. and J. Liu, "An Object-Oriented Query Processor that Produces Monotonically Improving Approximate Answers," Proceedings of the 7th International Conference on Data Engineering, April 1991. </li> </ul> <hr> <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 3.0//EN" "html.dtd"> <font face=arial size=2><p align=left><a href=/comments.html target=_top>Comments</a> | <a href=/ target=_top>CS Home</a> | <a href=http://www.eng.ua.edu target=_top>CoE Home</a> | <a href=http://www.ua.edu target=_top>UA Home</a></p></font> </body>