background

Research

My computer science interests fall into three main categories:

  1. databases and data mining - spatial and fuzzy databases, data mining (Ph.D. dissertation and the NGA project area)
  2. distributed systems - mobile agents programming in Java and integration of distributed spatial repositories (NGA project)
  3. artificial intelligence - fuzzy set theory and neural network applications (M.S. thesis and Ph.D. dissertation).

I am also interested in computational finance/economics. Even had once a thought to get a M.S. in this area. Well...we will see... I am not that old yet :). If you are looking for a partner to conduct some research in any of these fields, please send me an e-mail. I might be more than just interested ;).

Ad.1. DATABASES/DATA MINING

Databases were an area I chose for my major when taking oral part of my comprehensive exam at Tulane. My practical experience with databases dates back from 1999, when I was working half-time for "Accept", a company providing database administration and other computer-related services for large hospitals in Szczecin, Poland. This practice turned out quite useful when I got accepted to the NGA (National Geospatial-Intelligence Agency) research project, which directed my interests toward spatial data repositories (and distribute systems, which I am going to discuss later). This area of my interests was greatly enriched thanks to the active cooperation with my supervisor - Dr. F.E. Petry, who specializes in this field.

Currently I am actively conducting research on the descriptive data-mining technique called Attribute-Oriented Induction (AOI). I am concentrated on two aspects of this approach for acquisition of generalized knowledge from large datasets. The first is an application of Fuzzy Concept Hierarchies to perform AOI, actually I called this approach an Attribute-Oriented Fuzzy Induction. The second is a problem of utilization of AOI technique to mine abstract information from imprecise data. In this case I utilized a Fuzzy Database schema as the medium carrying the original information. You can get more detailed information about my work in this area by reading a few of the papers I published lately with Dr. Petry (look below at "My publications" section), or downloading papers of other authors which I have linked here:

Fuzzy Databases (chosen literature): S. Kumar De, R. Biswas, A.R. Roy, 'On extended fuzzy relational database model with proximity relations', Fuzzy Sets and Systems 117, 2001, pp. 195-201 F.E. Petry, Fuzzy Databases: Principles and Applications, Kluwer Academic Publishers, Boston, 1996. B.P. Buckles, F.E. Petry, A fuzzy representation of data for relational databases, Fuzzy Sets and Systems, 7 (3), 1982, pp. 213'226. S. Shenoi and A. Melton, Proximity Relations in the Fuzzy Relational Database Model, International Journal of Fuzzy Sets and Systems, 31 (3), 1989, pp. 285-296. S. Kumar De, R. Biswas, A. R. Roy, On extended fuzzy relational database model with proximity relations, Fuzzy Sets and Systems, 117 (2), 2001, pp. 195-201. Attribute-Oriented Induction in Data Mining (chosen literature, often co-authored by Dr. Jiawei Han): J. Han, Y. Cai, & N. Cercone, Knowledge discovery in databases: An attribute-oriented approach, Proc. 18th Int. Conf. Very Large Data Bases, Vancouver, Canada, 1992, pp. 547-559. J. Han & Y. Fu, Exploration of the Power of Attribute-Oriented Induction in Data Mining, in U.M. Fayyad, G. Piatetsky-Shapiro, P. Smyth & R. Uthurusamy (Eds.), Advances in Knowledge Discovery and Data Mining (Menlo Park, CA: AAAI/MIT Press, 1996) pp. 399-421. J. Han, Mining Knowledge at Multiple Concept Levels, Proc. 4th Int'l Conf. on Information and Knowledge Management, Baltimore, Maryland, 1995, pp. 19-24. C. L. Carter & H. J. Hamilton, Efficient Attribute-Oriented Generalization for Knowledge Discovery from Large Databases, IEEE Transactions on Knowledge and Data Engineering, 10(2), 1998, pp. 193-208. Here is also a link to my favorite book on Data Mining: J. Han & M. Kamber, Data Mining: Concepts and Techniques, Morgan Kaufmann, New York, 2000. Spatial Databases (popular links and some literature) Open GIS Consortium (standards for interfaces and protocols for geoprocessing) Intergraph - software vendor (GeoMedia, WebMap) ESRI - software vendor (ArcView, ArcInfo, Spatial Data Repository) Here are also two books about Geographic Information Systems I consider to be quite usefull: S. Shekhar & S. Chawla, Spatial Databases: A Tour, Prentice Hall, New York, 2002. (for introductory reading only) P. Rigaux, M.O. Scholl & A. Voisard, Spatial Databases: With Application to GIS, Morgan Kaufmann, New York, 2001. I would like to also strongly recommend here the website of Dr. Max.J. Egenhoffer. I really enjoyed reading his papers! TOP HOME PAGE Ad.2. DISTRIBUTED SYSTEMS Since 2000 I have been participating in a long-term research project, Intelligent Database Agents for Geospatial Knowledge Integration and Management, funded by the National Geospatial-Intelligence Agency (NGA). The aim of the project is to develop methodologies for autonomous evaluation, acquisition, validation, integration and update of distributed geospatial data. Here, the format of geospatial data is understood broadly and includes vector, raster, text, pictorial, as well as multimedia forms. Since the data sources are distributed over the Internet and include both the dedicated, proprietary databases and the web-based resources, intelligent mobile agent technology became the primary solution target. In the first year of my research I was programming mobile agents (Java) for the project needs. We tested usability of the following mobile agent platforms: (1) Aglets, (2) Concordia, (3) Voyager, and (4) Grasshopper. As a result, our research group published comparisons concerning utilization of these mobile agent platforms in context of distributed geospatial data integration (look below at "My publications" section). Affiliation with this project allowed me to be involved in: (1) preparations of the theoretical framework of the system, as well as (2) implementation of working prototypes that were employed in experimental studies concerning the performance of proposed solutions. Here are my two useful Java-related links: JAVA API Specification (for Java 2 Platform SE v1.3.1) My first Java Textbook: Deitel, H. M. and P. J. Deitel, Java How To Program, Prentice Hall (well, they have 5th edition now...) While the project current work is targeting the needs of NGA, I believe that the results obtained in the project can have great application in the area of distributed e-commerce systems. TOP HOME PAGE Ad.3. ARTIFICIAL INTELLIGENCE This is an area of my interests since the time of my second Master's thesis. I am very interested in applying fuzzy logic and set theory to the modeling of different business systems. The main areas of my research are: (1) Fuzzy modeling of expert knowledge for the needs of credit applicants' assessment*, and (2) Fuzzy hierarchical classification of data in the real estate sector. I believe my knowledge about economics, which I gained studying Business Administration, can provide some additional value to my future research in these areas. Here is an awesome book, which started my adventure with fuzzy logic, sets, and modeling (742 pages written by a single person! Can you imagine?): A. Piegat, Fuzzy Modeling and Control (Studies in Fuzziness and Soft Computing, Vol. 69), Physica Verlag, New York , 2001. I read the first edition in Polish in 1999, and now, 5 years later, I am still keeping the English edition on my desk. *you can get better feeling about my work in this area by clicking on my MS in CS thesis at "My theses" section. TOP HOME PAGE Theses Master Thesis in Bussines Managemet - defended in February of 1999 Master Thesis in Computer Science - defended in July of 2002 Prospectus of my Ph.D. in Comp. Science - presented in September 2003 [PDF] Presentation from my Ph.D. Defense - defended in March 2004 [PDF] TOP HOME PAGE Miscellaneous links The ACM Digital Library: Portal IEEE Computer Society Academic Press Journal Home Pages Elsevier Computer Science Tulane University Libraries Catalog Research Index: Scientific Literature Digital Library Science Direct Webopedia: Online Dictionary for Computer and Internet Technology Google: Computer Science Conferences Meetings and Conferences in Data Mining, Knowledge Discovery, Genomic Mining, and Web Mining My Favorite Journals IEEE Transactions on Knowledge and Data Engineering ACM Transactions on Database Systems Distributed and Parallel Databases SIGKDD Explorations Data & Knowledge Engineering Knowledge and Information Systems Data Mining and Knowledge Discovery IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics IEEE Transactions on Fuzzy Systems Fuzzy Sets and Systems Journal of Intelligent Information Systems International Journal of Intelligent Systems International Journal of Uncertainty Fuzziness and Knowledge-Based Systems Information Sciences