The Management

Stephan Kudyba (President Null Sigma Inc.) 

Stephan Kudyba began his career in the investment banking industry for such institutions as Citibank NY and Dresdner Bank (NY and Frankfurt Germany) where his activities included risk exposure management, global market analysis and the design of models which identified trends in securities prices.  He more recently turned his focus to the evolving information economy and began devising IT productivity applications for Fortune 500 companies focusing on data mining applications while at Cognos Corporation.  He holds an MBA and PhD in Managerial Economics, with a focus on corporate productivity through IT initiatives.  He is the author of “Data Mining and Business Intelligence: A Guide to Productivity” and “Information Technology, Corporate Productivity and the New Economy”.  Following is a list of his publications and public speaking activities. 

Books: 

Information Technology, Corporate Productivity and the New Economy, Kudyba, S.,  and Diwan, R., Greenwood Publishing, Westport Connecticut, April 2002. 

Data Mining and Business Intelligence: A Guide to Productivity, Kudyba, S., and Hoptroff, R., Idea-Group Publishing, Hershey, PA. , February 2001.

Articles:                

Increasing Returns to Information Technology, Kudyba, S., and Diwan, R., Information Systems Research, 2002. 

The Sweet Spot to Corporate Productivity (Analytical Decision Support Systems), Kudyba, S., DM Review, February, 2002. 

The Impacts of Information Technology on US Industry, Kudyba, S., and Diwan, R., Japan and the World Economy, January, 2002. 

Treasury Bond Yields and Equities: A non-linear relationship, Kudyba S., and Diwan R., Futures Magazine, (November 1999). 

Are Neural Networks a Better Forecaster? Kudyba, S., Futures Magazine, (October 1998).             

Rising Commodities and Higher Inflation? Kudyba, S., and Diwan, R., Futures Magazine (February 1998).

Conferences:

Federated Press (Toronto, Canada), “Data Mining for Marketing Success”, Virtual presenter from NYU Stern School, October 2001.

Productivity Symposium at NYU's Center for Japan-US Business and Economic Studies, (New York, NY), “The Impact of Information Technology on US Industry" March 2001.

North American Productivity Workshop (Union College, Schenectady, NY), “Productivity in US Information Technology”: June 2000.

Eastern Economic Association (Crystal City Virginia) “Profitability in US Industry: The Evolution of the Information Economy”. March 2000.

Future South Conference (Orlando Florida) “Model Building in the Information Age” and the “Futures South Round Table Discussion of Analytical Technology in the Financial Markets”:  Cover of Futures Magazine (May 1999).   

Richard Hoptroff:  Director Null Sigma Europe 

Richard Hoptroff’s is a physicist specializing in modeling non-linear systems dynamics.  For most of his business career he has used these techniques in business modeling and forecasting, both as a consultant and also by creating and publishing the 4Thought software package.  He was Founder of Right Information Systems Ltd, a management consulting and computer software company specializing in mathematical modeling for business analysis and forecasting and later was director of data mining at Cognos Corporation.  He holds a BS and PhD in Physics from the University of London, where his studies focused on researching neural networks and genetic algorithms. 

Publications:                             

Data mining and business intelligence: A guide to productivity, S Kudyba and R G Hoptroff, Idea Group Publishing, Hershey, PA, (2001) 

Practical approaches to pricing analysis, R G Hoptroff, D W Nairn and A M Shepherd, Journal of targeting, measurement and analysis for marketing, Henry Stewart, Vol6 No3 (1998). 

Contemporary approaches to quantifying advertising effectiveness, R G Hoptroff, M Williams and N Barak, Journal of targeting, measurement and analysis for marketing, Henry Stewart, Vol5 No4 (1997). 

Neural network case studies in marketing analysis, R G Hoptroff, Journal of targeting, measurement and analysis for marketing, Henry Stewart, Vol3 No3 (1995). 

Using neural networks for modeling and forecasting in financial trading applications, R G Hoptroff, Conference on new techniques for financial analysis, Birmingham, UK (1995). 

The principles and practice of time series forecasting and business modeling using neural nets, R G Hoptroff, Neural computing and applications, Springer-Verlag, Vol1 No1 pp59-66 (1992). 

Neural control strategies, R G Hoptroff, T J Hall and R E Burge, Invited paper, Computers & mathematics with applications, (July 1992). 

Optimization algorithms for neural net learning in practical applications, R G Hoptroff, PhD Thesis, King’s College, University of London, (1992). 

Forecasting economic turning points with neural nets, R G Hoptroff, M J Bramson and T J Hall, Proceedings of the International Joint Conference on Neural Networks, Baltimore, (1991). 

Forecasting the economic cycle: a neural network approach, R G Hoptroff, M J Bramson and T J Hall, Workshop on neural networks for statistical and economic data, Dublin, (Dec 1990). 

Experiments with a neural controller, R G Hoptroff, T J Hall and R E Burge, Proceedings of the International Joint Conference on Neural Networks, San Diego June 17-21, Vol.II p735 (1990). 

Two optimization approaches to COHOE design, R G Hoptroff, P W McOwan, T J Hall, W J Hossack and R E Burge, Optics Communications, Vol73 No3 pp188-194 (1989). 

Learning by diffusion for the multilayer perceptron, R G Hoptroff and T J Hall, Electronics Letters, Vol85 No8 pp531-533 (1989).