2003 - 2008: Associate Dean PWP Programs

1984 - Present: Professor, Operations and Decision Technologies, The Paul Merage School of Business, University of California, Irvine

1985 - 1989: Associate Dean, The Paul Merage School of Business, University of California, Irvine

1982 - 1984: Associate Professor, Operations Management and Quantitative Methods, The Paul Merage School of Business, University of California, Irvine

1978 - 1982 Senior Lecturer, Operations Research and Industrial Management, School of Mechanical and Industrial Engineering, The University of New South Wales, Australia

1972 - 1978 Lecturer, Operations Research and Industrial Management, School of Mechanical and Industrial Engineering, The University of New South Wales, Australia

1971 - 1972 Operations Research Analyst for a firm in the steel industry, Broken Hill Pty., Ltd. Duties included scheduling, queueing analysis and process optimization.

• 1976 (6 months) Statistical Laboratory, Cambridge University, U.K.
• 1979 (6 months) Operations Research Department, Stanford University
• 1997-2000 (4 quarters) College of Business, University of Texas, Austin

Joint Appointment

• 1996-2010 Department of Electrical and Computer Engineering

• Faculty Service Award (GSM) 1989
• Outstanding Professor Award (Executive MBA) 1990
• Lauds and Laurels Distinguished Teaching Award (UCI) 1991
• HCEMBA Excellence in Teaching Award (2001)
• UCI Excellence in Teaching Award (2001)

Professional Activities

• Associate Editor - Zeitschrift fur Operations Research (ZOR), Series A: Theory (1990 to 1996)
• Associate Editor - International Journal of Quantitative and Operations Management (1994 +)
• Associate Editor - International Journal of Quality and Production Management (2005+)
• Associate Editor - Journal of Industrial and Mangement Optimization (2006+)
• Member - Operations Research Society of America
• Member - American Society for Quality Control
• Member - Mathematical Programming Society
• Founding Member - TIMS/ORSA, Orange County Chapter
• Cluster Chairman - Nonlinear Programming, ORSA/TIMS Conference, Los Angeles, 1986
• General Chairman - ORSA/TIMS Conference, Anaheim, 1991
• Cluster Chairman - Nonlinear Programming, ORSA/TIMS Conference, Los Angeles, 1995
• Program Co-Chair - INFORMS Conference, San Diego, 1997
• Program Co-Chair - INFORMS Conference, San Diego, 2009

Consulting Activities

Much of my work in this area has been associated with the development of mathematical models for decision making and with the statistical analysis of data. Specific engagements have included the following:

• Steel Furnace Optimization -- Broken Hill Pty. Ltd. (1971, 1972)
• Cost Benefit Analysis of Raw Material Recycling -- Coca Cola Pty. Ltd. (1973)
• Market Response to Advertising -- Union Carbide (1974)
• Farm Management Policies, Mill Size -- Colonial Sugar Ref. Co. (1975, 1976)
• Liquidity Forecasting, Project Management -- Civil and Civic (1977)
• Warehouse Location -- Australian Consolidated Industries (1978)
• Production Scheduling -- Blue Metal Industries (1978, 1979)
• Ship Replacement Policies -- Australian National Lines (1981)
• Statistical Quality Control -- Nashua (1980, 1981)
• Network Optimization, Short-Term Investments -- Esso (1981)
• Total Quality Control - Sigma Circuits (1988)
• Plant Relocation - Parker Hanifin (1989)
• Emergency Response System Design - Hartson Medical Services (1990)
• Global Manufacturing - Huck Manufacturing (1991)
• Resource Deployment - UCI Medical Center (1991)
• Total Quality Management - Olec Corp. (1991)
• Quality/Worker Empowerment - Baxter Medical (1991)
• Statistical Process Control - Allergan (1995)
• Re-engineering - Sea Space Corp (1997)

Recent Conference Papers (1984 to Present)

1. "Symmetric Duality in Generalized Fractional Programming" - ORSA/TIMS Conference, St. Louis, 1987.
2. "On the Distribution Problem for Convex Programs" - ORSA/TIMS Conference, Washington, 1988.
3. "Consistent Forecasts of Corporate Accounts" - ORSA-TIMS Conference, Denver, 1988.
4. "On Solution Sensitivity for Convex Programs" - ORSA-TIMS Conference, Denver, 1988.
5. "Composite Geometric Programming" - Third SIAM Conference on Optimization, Boston, 1989.
6. "Conjugate Duals for Power Functions" - CORS/TIMS/ORSA Conference, Vancouver, 1989.
7. "On Duality for Mathematical Programs Involving Composite Functions" - TIMS Conference, Osaka, 1989.
8. "Conjugate Duals for Composite Functions" - GMOOR, Ulm, 1989.
9. "Conjugate Duality in Composite Mathematical Programming" - ORSA/TIMS Conference, Las Vegas, 1990.
10. "On Quality Production Plans" - ORSA/TIMS Conference, Philadelphia, 1990.
11. "A Convex Dual for Quadratic-Concave Fractional Programs" - ORSA/TIMS Conference, Nashville, 1991.
12. "Separable Convex Programs with Ratio Constraints over a Directed Tree" - SOR Conference, Trier, Germany, 1991.
13. "Stochastic Geometric Programming" - University of Karlsruhe, Germany, 1991.
14. Applications of Dynamic Programming in Manufacturing" - Graduate School of Management, University of California, Riverside, 1992.
15. "Total Quality Management" - Department of Management, Hong Kong University of Science and Technology, 1992.
16. "Dynamic Programming Applications in Manufacturing" - SOR Conference, Hamburg, Germany, 1991.
17. "Relocation of Production Lines" ORSA/TIMS Conference, San Francisco, 1992.
18. "On the Optimal Subset of Sizes" ORSA/TIMS Conference, San Francisco, 1992.
19. "Applications of Integer Programming" - Department of Management, Hong Kong University of Science and Technology, 1993.
20. "Resource Allocation in Project Management Using Geometric Programming" TIMS/ORSA Conference, Chicago, 1993.
21. "Dynamic Financial Planning: Certainty Equivalence and Stochastic Constraints" ORSA/TIMS Conference, Phoenix, 1993.
22. "Planning and Scheduling Relocation of Production Lines under Resource Capacity Constraints" IFORS Conference, Lisbon, Portugal, 1993.
23. "On Queueing Location Problems with Various Objectives" TIMS/ORSA Conference, Boston, 1994.
24. Modeling with Integer Programs in Manufacturing and Service Operations" GSM, UCI, 1994.
25. "Applications of Integer Programming" Operations Research Program, North Carolina State University, 1994.
26. "Integer Programming in Operations Management" TIMS International Conference, Anchorage, Alaska, 1994.
27. "Constrained Estimation for Convex Optimization" 15th International Symposium on Mathematical Programming, Ann Arbor, Michigan, 1994.
28. "Applications of Integer Programming" SOR Conference, Berlin, Germany, 1994.
29. “Selection of an Optimal Subset of Sizes,” INFORMS, Detroit 1994.
30. “Applications of Integer Programming,” OR/OM Day, USC, 1995.
31. “A Strategic Model for Customer Satellite Assignment,” INFORMS, Washington, 1996. 
32. “Selection of an Optimal Subset of Sizes,” INFORMS, Washington, 1996.
33. “On the Location of a Central Warehouse,” ISOLDE, Edmonton, 1996.
34. “On Duality for a Sum of Ratios,” INFORMS, San Diego, 1997.
35. “Duality for Convex and Nonconvex Sum of Ratios,” Mathematical Programming Conference, Lausanne, 1997.
36. “On the Feasible Points of the Weber Problem with Uncertain Weights”, INFORMS, Dallas, 1997. 
37. “Quality Tolerancing and Conjugate Duality”, INFORMS, Montreal, 1998.
38. “On a Convex Fractional Program”, INFORMS, Cincinnatti, 1999.
39. “Financial Statement Estimation through Entropy”, INFORMS, Philadelphia, 1999.
40. “Duality for Bilinear Fractional Programs”, INFORMS, Salt Lake City, 2000.
41. “Strategic and Tactical Models for Customer Assignment to a Commercial Satellite” ICOQM-III, Sydney, 2000.
42. “Models for Inventory Location”,Operations Research Program, North Carolina State University, Raleigh, 2001.
43. “Geometric Programming in Operations Management”, INFORMS, Miami,2001.
44. “Real Applications of Integer Programming”, School of Management, University of Colorado,Boulder,2002.
45. “Revenue Management in Telecommunications”,INFORMS,San Jose, 2002.
46. “Dynamic Financial Planning: Certainty Equivalents, Stochastic Constraints and Conjugate Duality”, INFORMS, Atlanta,2003.
47. “On Multiple Resource Allocation in Project Management”, INFORMS, Denver, 2004.
48. “Stochastic Geometric Programming”, Anderson School of Management, University of California, Riverside, 2004.
49. “Locating a Service Facility with some Unserviced Demand”, INFORMS, San Francisco, 2005.
50. “Geometric Programming Operations Management Applications”, INFORMS, Pittsburgh, 2006.
51. “Optimizing the Location of a Production Firm”, INFORMS, San Diego, 2009.
52. “Location of a Distribution Center for a Perishable Product”,INFORMS, Austin, 2010.
53. “A Cyclic Queueing Model for Mobile Dentistry” Queueing Theory and Network Applications Conference, Seoul, 2011.

Doctor of Philosophy

1. "Quantitative Management Models for a Sugar Cane Farm," by B. Whan
2. 2. "Optimal Marketing-Production Decisions," by C. Chansa-Ngavej
3. "Solution Sensitivity for Convex Programs," by S. Jorjani
4. "On the Economic Justification of a Flexible Manufacturing System," by A. Lee

Master of Engineering Science

1. "Geometric Programming," by W. Green
2. "Recycling: A Cost Benefit Approach," by J. Kedzier
3. "Advertising Response in Marketing," by R. Bruce
4. "Comparison of Penality Functions in Nonlinear Programming," by M. Jaul
5. "Variational Methods in Operations Research," by Y. Lee
6. "Management Decisions via Generalised Geometric Programming," by P. Kerdvonbundit
7. "Mathematical Modelling of a Multiperiodic Stochastic Inventory System," by K. L. Cheah
8. "Nonlinear Multicommodity Flow Problem," by I. Hidayat
9. "Multi-resource Allocation Problems," by P. Manass

Bachelor of Engineering Science

1. "Management Games," by M. Hall
2. "Comparison of Unconstrained Minimization Methods," by S. Hui
3. "Dynamics of Exploited Populations," by W. Chow
4. "Production Scheduling with Workforce Constraints," by S. Jobbins
5. "Optimal Fishing Strategies," by N. Pan
6. "Computational Aspects of Dynamic Programming," by A. Kiatwankul
7. "Transients in Series Queues," by I. Robinson
8. "Operations Research in Underdeveloped Countries," by R. Manothirawat
9. "Allocation via Geometric Programming," by C. Kerdvonbundit 
10. "Housing Development in Malasia," by K. Ng
11. "Operations Research in the Australian Mining Industry," by A. Lee
12. "Development of an Optimum Ship Replacement Policy," by W. Smith
13. "Oil Distribution Networks," by K. Royal
    
    

University of California, Irvine (1982 to Present) 

At the Graduate School of Management, I teach in the regular MBA program, the Executive MBA program, the Fully Employed MBA program (currently Flex MBA Program), the Health Care Executive MBA program, and in Executive Education. Subjects taught include:

• Operations Management
• Quantitative Methods for Management
• Statistics for Management
• Mathematical Optimization for Management
• Seminar in Energy Planning . Total Quality Management
• Operations Management in Health Care Services
• Convex Programming
• Management of Distributed Service Networks
• Forecasting .Supply Chain Management
• Optimal Decision Making in Management
• Forecasting and Data Mining
• Predictive Analytics

University of New South Wales (1972-1982)

These were in areas associated with Operations Research in a School of Mechanical and Industrial Engineering which caters to both undergraduate and graduate courses. I taught a course in the Australian Graduate School of Management. Subject names are listed below:

• Operations Research
• Optimization
• Case Studies in Operations Research
• Optimization on Networks
• Optimal Control in Operations Research
• Distribution Management
• Management Science Models
• Management Statistics
• Applied Stochastic Processes

My research interests are in the application of quantitative methods to decision making problems and in the development of new theory for optimization. I am particularly interested in the uses of mathematical analysis in the simplification of optimization problems prior to computation, although some of my work has suggested powerful new computational techniques.

1. Development of a methodology and associated algorithms for models of spatial interaction. This has been applied in transportation planning, in the forecasting of residential population distribution, and in mineral processing. (See Publications 6, 8, 15, 18, 19, 28, 37, 43, 58)

2. A new theory for quasi-concave programming and equilibrium problems which has particular relevance to economics (29, 38, 39, 40)

3. Various generalizations of duality theory (9, 10, 11, 12, 13, 21, 22, 25, 30, 49, 50, 52, 61, 62, 63, 64, 65, 68) and its application to:

• Resource Allocation (23, 59)
• Portfolio Analysis (31)
• Linearly Constrained Convex Programs (51)
• Sensitivity Analysis (47)
• Nonlinear Multicommodity Flow Problem (44)
• Minmax Location (53, 68)
• Fractional Programming (35, 39, 62, 76, 77, 78,79)
• Machinery Economics (54, 74)
• Equilibrium (57)
• Composite Functions (65, 66)
• Project Management (72)
• Facility Location (73)

4. Miscellaneous applications of operations research methodology to:

• Sugar Cane Harvesting (4, 17)
• Control of Queues (3)
• Machine Maintenance Policies (26)
• Manufacture of Heart Valves (69)
• Allocation of Work Orders (70)
• Warehouse Location (75)

Book in progress: “Geometric Programming” with T.R.Jefferson, Springer, 2017.

Publications:

• "Nonlinear Optimization Codes," C.R.L. Technical Communication, No. 30, 1971.
• "Quasiparticles for the Quantum Electron Transport Problem," with E. J. Moore, Physica, Vol. 62, 312-320, 1972.
• "Optimal Regulation of the Service Rate for a Queue with Finite Waiting Space," with T. R. Jefferson, Journal of Optimization Theory and Applications, Vol. 20, 245-250, 1976.
• "Scheduling Sugar Cane Plant and Ratoon Crops and a Fallow: A Constrained Markov Model," with B. M. Whan and T. R. Jefferson, Journal of Agricultural Engineering Research, Vol. 21, 281-289, 1976.
• "Quasiparticles for the Classical Electron Impurity Transport Problem," Journal of Physical Society of Japan, Vol. 40, 326-327, 1976.
• "Entropy Maximizing Models of Residential Location via Geometric Programming," with T. R. Jefferson, Geographical Analysis, Vol. 9, 181-187, 1977.
• "Generalized Geometric Programming with Applications to Various Problems of Operations Research," with T. R. Jefferson, Proceedings of the 3rd National Conference of the Australian Society for Operations Research, R. G. J. Mills, ed., 185-198, 1977.
• "Entropy Models of Spatial Interaction and Geometric Programming," with T. R. Jefferson, Proceedings of the 3rd National Conference of the Australian Society for Operations Research, R. G. J. Mills, ed., 175-184, 1977.
• "Trace Optimization Problems and Generalized Geometric Programming," with T. R. Jefferson, Journal of Mathematical Analysis and Applications, Vol. 58, 373-377, 1977.
• "A Generalization of Geometric Programming with an Application to Information Theory," with T. R. Jefferson, Information Sciences, Vol. 12, 263-269, 1977.
• "Duality for Convex Functionals: Specific Cases," International Journal of Systems Science, Vol. 8, 1313-1320, 1977.
• "Duality in Infinite Dimensional Mathematical Programming: Convex Integral Functionals," with T. R. Jefferson, Journal of Mathematical Analysis and Applications, Vol. 61, 251-261, 1977.
• "Duality in Finite Dimensional Complex Space," with T. R. Jefferson, Bulletin of Australian Mathematical Society, Vol. 18, 65-75, 1978.
• "Entropy and Geometric Programming in Transportation Planning," with T. R. Jefferson, Opsearch, Vol. 15, 22-34, 1978.
• "The Analysis of Flexible Entropy Models of Spatial Interaction Using Geometric Programming," with T. R. Jefferson, Proceedings of 14th Annual Conference of Operational Research Society of New Zealand, C. A. de Kluyver, ed., Vol. 1, 39-47, 1978.
• "Variational Methods in Operations Research," with T. R. Jefferson, Proceedings of 14th Annual Conference of Operational Research Society of New Zealand, C. A. de Kluyver, ed., Vol. 1, 1-10, 1978.
• "A Stochastic Model of Sugar Cane Crop Rotation," with B. M. Whan and T. R. Jefferson, Journal of Operational Research Society, Vol. 29, 341-348, 1978.
• "Forecasting the Effects of Changes in the Work-Place Locations on Residential Development and Trip Generation," with T. R. Jefferson, P. Walsh, and R. W. Gibberd, Proceedings of the 4th Australian Transport Research Forum, 549-566, 1978.
• "Avenues of Geometric Programming I. Theory," with T. R. Jefferson, New Zealand Operational Research, Vol. 6, 109-136, 1978.
• "Generalized Geometric Programming Applied to Problems of Optimal Control I. Theory," with T. R. Jefferson, Journal of Optimization Theory and Applications, Vol. 26, 117-129, 1978. Reprinted in Advances in Geometric Programming, M. Avriel, ed., Plenum Press, 151-163, 1980.
• "A Duality Approach to Discrete Time Control Theory," with T. R. Jefferson, Journal of Australian Mathematical Society, Series B, Vol. 20, 257-264, 1978.
• "On Finding a Point in the Relative Interior of a Polyhedral Set and Degeneracy in Geometric Programming," with T. R. Jefferson, Journal of Australian Mathematical Society, Series B, Vol. 20, 487-494, 1978.
• "Avenues of Geometric Programming II Applications," with T. R. Jefferson, New Zealand Operational Research, Vol. 7, 51-68, 1979.
• "Geometric Programming Duality Applied to the Resource Allocation Problem," with T. R. Jefferson and P. Kerdvonbundit, INFOR, Vol. 17, 133-137, 1979.
• "Characterizations of Optimality for Continuous Convex Mathematical Programs I. Linear Constraints," with T. R. Jefferson, Journal of Australian Mathematical Society, Series B, Vol. 21, 37-44, 1979.
• "A Bilinear Control Model for Optimal Maintenance," with T. R. Jefferson, International Journal of Control, Vol. 30, 323-330, 1979.
• "Complementary Variational Principles via Generalized Geometric Programming," with T. R. Jefferson and B. Lederer, Journal of Mathematical Analysis and Applications, Vol. 69, 489-495, 1979.
• "The Analysis of Entropy Models with Equality and Inequality Constraints," with T. R. Jefferson, Transportation Research, Vol. 13B, 123-132, 1979.
• "Duality for Quasi-Concave Programs with Applications to Economics," with T. R. Jefferson and M. Folie, Naval Research Logistics Quarterly, Vol. 26, 611-625, 1979.
• "On Geometric Duality for State-Constrained Control Problems," with T. R. Jefferson, Bulletin of Australian Mathematical Society, Vol. 20, 301-312, 1979.
• "The Analysis of Risky Portfolios by Geometric Programming," with T. R. Jefferson and J. Cozzolino, Zeitschrift fur Operations Research, Series A: Theory, Vol. 23, 205-217, 1979.
• "Computational Aspects of Prototype Geometric Programming," with T. R. Jefferson, Proceedings of 4th National Conference of Australian Society for Operations Research, 119-128, 1979.
• "Implications of Modern Control Theory in Management Science," with T. R. Jefferson, Proceedings of 4th National Conference of Australian Society for Operations Research, 302-316, 1979.
• "Convex Stochastic Programs with Simple Recourse," with T. R. Jefferson, International Journal of Systems Science, Vol. 10, 1143-1148, 1979.
• "Fractional Programming Duality via Geometric Duality," with T. R. Jefferson, Journal of Australian Mathematical Society, Series B, Vol. 21, 398-401, 1980.
• "On Zero Degree of Difficulty Programs and the Distribution Problem," with T. R. Jefferson, International Journal of Systems Science, Vol. 11, 129-138, 1980.
• "On Analysis of an Information Theoretic Model of Spatial Interaction," with T. R. Jefferson, Information Sciences, Vol. 20, 1-12, 1980.
• "A Duality Theory for Quasiconcave Programs," with T. R. Jefferson, Applicable Analysis, Vol. 10, 165-177, 1980.
• "Duality for Quasi-Concave Programs with Explicit Constraints," with T. R. Jefferson, Mathematik Operationsforschung and Statistik, Series Optimization, Vol. II, 519-530, 1980.
• "Dual Games," with T. R. Jefferson, Journal of Mathematical Analysis and Applications, Vol. 77, 288-296, 1980.
• "Geometric Programming with Probabilistic Decision Variables," with T. R. Jefferson, Journal of Australian Mathematical Society, Series B, Vol. 22, 229-236, 1980.
• "Dimensionality Reduction for a Class of Convex Network Flow Problem," with T. R. Jefferson, International Journal of Systems Science, Vol. 11, 1499-1503, 1980.
• "Duality in Convex Programming and Some Ramifications," with T. R. Jefferson, Proceedings of 5th National Conference of Australian Society for Operations Research, 68-78, 1981.
• "An Algorithm for Nonlinear Multicommodity Flow," with T. R. Jefferson, Proceedings of 5th National Conference of Australian Society for Operations Research, 120-132, 1981.
• "Conjugate Duality for Fractional Programs," with T. R. Jefferson, Journal of Mathematical Analysis and Applications, Vol. 84, 381-389, 1981.
• "Models for Forecasting Residential Populations: The Geometric Programming Approach," with P. K. Walsh, T. R. Jefferson and R. W. Gibberd, Regional Studies, Vol. 15, 521-531, 1981.
• "A Relaxation of the Constraints for a Convex Mathematical Program," with D. K. Kulshrestha and T. R. Jefferson, New Zealand Operational Research, Vol. 10, 29-34, 1982.
• "Lower Bounds for Convex Programs," with T. R. Jefferson, International Journal of Systems Science, Vol. 13, 1109-1115, 1982.
• "Generalized Geometric Programming for Functionals," with T. R. Jefferson, Applicable Analysis, Vol. 17, 13-22, 1983.
• "Duality for Minmax Programs," with T. R. Jefferson, Journal of Mathematical Analysis and Applications, Vol. 100, 385-392, 1984.
• "Theoretical Framework for the Analysis of Linearly Constrained Convex Programs," with T. R. Jefferson, International Journal of Systems Science, Vol. 15, 617-625, 1984.
• "On Duality for Convex Minimization with Nested Maxima," with T. R. Jefferson and E. Sirri, Journal of Australian Mathematical Society, Series B, Vol. 26, 517-522, 1985.
• "Solution of Constrained Minmax Location Problems via Conjugate Duality," with B. Murtagh and E. Sirri, New Zealand Operational Research, Vol. 13, 61-67, 1985.
• "Quadratic Geometric Programming Applied to Machining Economics," with T. R. Jefferson, Mathematical Programming, Vol. 31, 1-16, 1985.
• "Duality on Convex Cost Networks," with T. R. Jefferson, Proceedings of 14th Annual Meeting of American Institute for Decision Sciences (AIDS), Monterey, CA, 103-105, 1985.
• "On Duality for Entropy Constrained Programs," with T. R. Jefferson and S. Jorjani, Information Sciences, Vol. 35, 211-221, 1985.
• "Equilibria and Convex Cost Networks," with H. McMillan and T. R. Jefferson, International Journal of Systems Science, Vol. 17, 1007-1013, 1986.
• "An Entropy Approach to Material Balancing in Mineral Processing Circuits," with T. R. Jefferson, International Journal of Mineral Processing, Vol. 18, 251-261, 1986.
• "Bounded Linear Allocation with a Nonlinear Cost Constraint is an Unconstrained Problem," with T. R. Jefferson, INFOR, Vol. 25, 320-326, 1987.
• "Nonstandard Posymonial Geometric Programs," with T. R. Jefferson, International Journal of Systems Science, Vol. 18, 1467-1474, 1987.
• "Duality for Programs involving Nonseparable Objective Functions," with T. R. Jefferson and S. Jorjani, International Journal of Systems Science, Vol. 19, 1911-1918, 1988.
• "Conjugate Duality in Generalized Fractional Programming," with T. R. Jefferson, Journal of Optimization Theory and Applications, Vol. 60, 475-483, 1989.
• "Conjugate Duals for Power Functions," with T. R. Jefferson, International Journal of Systems Science, Vol. 20, 2153-2160, 1989.
• "On Duality for Mathematical Programs Involving Composite Functions," with T. R. Jefferson, Methods of Operations Research, Vol. 62, 147-155, 1989.
• "Composite Geometric Programming," with T. R. Jefferson and Y. P. Wang, Journal of Optimization Theory and Applications, Vol. 64, 101-118, 1990.
• "Composite Convex Programs," with T. R. Jefferson, International Journal of Systems Science, Vol. 22, 2691-2696, 1991.
• "Separable Convex Programs with Ratio Constraints over a Directed Tree," with C. S. Tang, Operations Research Letters, Vol. 11, 147-152, 1992.
• "Quality Locations for the Constrained Minimax Location Model," with S. Jorjani and T.R. Jefferson, International Journal of Systems Science, Vol. 24, 1009-1016, 1993.
• "Optimal Production Sequence for a Product with Matching Components," with K. So, Operations Research,Vol. 42, 694-708, 1994.
• "Optimal Allocation of Work Orders in a Multi-Echelon Factory Network," with K. So, Journal of the Chinese Institute of Industrial Engineers, Vol. 11, 105-110, 1994.
• "Implications of Conjugate Duality in Mathematical Programming," with T. R. Jefferson, Mathematics Today, Vol. 12, 49-60, 1994."
• Allocation of Resources in Project Management: with T. R. Jefferson, International Journal of Systems Science Vol. 26, 413-420, 1995.
• "Conjugate Duality in Facility Location" with T. R. Jefferson and S. Jorjani, Facility Location: A Survey of Applications and Methods, ed. Z. Drezner, Springer Verlag, 89-101, 1995.
• "Stochastic Tool Management via Composite Geometric Programming" with T. R. Jefferson and A. Lee, Optimization, Vol. 36, 59-74, 1996.
• "On the Optimal Location of a Central Warehouse," with J. Song, Studies in Locational Analysis, Vol. 9, 123-126, 1996.
• "Convex Dual for Quadratic Concave Fractional Programs," with T. R. Jefferson, Journal of Optimization Theory and Applications, Vol. 91, 115-122, 1996.
• "Duality for a Sum of Convex Ratios" with T. R. Jefferson, Optimization, Vol. 60, 303-312, 1997.
• "A Duality Theory for a Class of Generalized Fractional Programs," with T. R. Jefferson and H. Frenk, Journal of Global Optimization Vol. 12, 239-245, 1998.
• "Duality for a Nonconvex Sum of Ratios," with T. R. Jefferson, to appear in the Journal of Optimization Theory and Applications.
• "Various Objectives for the Queuing Location Problem on the Plane," with Z. Drezner and T.R. Jefferson, Asian Pacific Journal of Operational Research, Vol. 16, 203-214, 1999.
• "Selection of an optimal subset of sizes," with S. Jorjani and David Woodruff, International Journal of Production Research, Vol. 37, 3697-3710, 1999.
• “Estimating Financial Statement Information: An Entropy Approach” with T.R. Jefferson and W. Rodgers, Journal of Accounting and Finance, Vol. 13,1-19, 1999.
• "On the Feasible Set for the Squared Euclidean Weber Problem and Applications," with Z. Drezner, to appear in European Journal of Operations Research."
• "Several Results for the Design of Queuing Systems," with X. Chao, Operations Research, Vol. 48, 965-970, 2000.
• "Tactical and Strategic Models for Satellite Customer Assignment," with O. Skelton and E. Rolland, Journal of Operational Research Society, Vol. 51, 61-71, 2000.
  
• “Quality Tolerancing and Conjugate Duality” with T.R.Jefferson, Annals of Operations Research, Vol. 105,185-200, 2001.
• “On Duality for a Class of Quasiconcave Multiplicative Programs” with T.R.Jefferson, Journal of Optimization Theory and Applications, Vol. 117, 575-583, 2003.
• “Duals for Classical Inventory Problems via Generalized Geometric Programming” with T.R.Jefferson and S. Jorjani, Journal of Applied Mathematics and Decision Sciences, Vol. 8, 191-200,2004.
• “A Model for the Allocation of Electronic Components to Reuse Options” with S. Jorjani and J. Leu, International Journal of Production Research, Vol.42. 1131-1145, 2004
• “The Central Warehouse Location Problem Revisited” with J. Song and Z.Drezner, “IMA Journal of Management Mathematics”, Vol.14, 321-336,2003
• “On Models for the Operation of a Class of Electronic Marketplaces” with J.E. Scott, Omega, Vol. 32, 373-383, 2004. 
• “Duality for Linear Multiplicative Programs” with T.R.Jefferson, ANZIAM J. Vol. 46,393-397,2005.
• “Dynamic Financial Planning” with T.R.Jefferson, IIE Transactions. Vol. 37, 931-938,2005
• “Efficient Allocation of Online grocery orders” with J.E.Scott, “International Journal of Productivity and Quality Management”,Vol. 1,88-102,2005.
• “Locating a Service Facility with some Unserviced Demand” with Z.Drezner, IMA Journal of Management Mathematics, Vol.17,359-371,2006.
• “On Duality for Square Root Convex Programs” with T.R.Jefferson, Mathematical Methods of Operations Research, Vol. 65, 75-84,2007.
• “Geometric Programming” with T.R.Jefferson, Encyclopaedia of Computer Science and Engineering,edited by B.Wah,John Wiley,Vol. 3,1417-1429, 2008.
• “Geometric Programming Models for Multiple Resource Allocation in Project Management”with T.R. Jefferson and S.Jorjani, International Journal of Operations and Quantitative Management, Vol.14,171-192,2008.
• “Online Grocery Order Fulfillment Tradeoffs” with J.E.Scott, Proceedings of the HICS Conference, Hawaii,2008.
• “Geometric Programming” with T.R.Jefferson, Tutorials in Operations Research, INFORMS, Ed. M. Oshoorouchi,81-101,2009.
• “Location of a facility minimizing nuisance to or from a planar network” with T.Drezner and Z.Drezner,Computers and Operations Research,Vol.36,135-148,2009.
• “Optimizing the Location of a Production Firm” with Z.Drezner, Networks and Spatial Economics, Vol.10,411-425,2010.
• “Optimization of a Cyclic Queue for Mobile Dentistry” with T.R.Jefferson, QTNA Proceedings, Seoul,150-154,2010.
• “One Tailed Tests of Means for Multivariate Normal Distributions derived by Generalized Geometric Programming”,with T.R.Jefferson, Pacific Journal of Optimization, Vol.8,595-607,2012.
• “Location of a Distribution Center for a Perishable Product” with Z.Drezner, Mathematical Methods of Operations Research, Vol.13,301-314,2013. 
• “Approximate and Exact Formulas for the (Q,r) Inventory Model, with Z. Drezner, Journal of Industrial Management and Optimization, Vol.11,135-144,2015.
• “Mixed Planar and Network Single-Facility Location Problems”, with Z.Drezner and J.Turner, Networks, Vol.68,271-282,2016 
• “Drone Delivery Models for Healthcare”, with J.E.Scott, Proceedings of 2017 HICSS Conference,3297-3304,2017.
• “Models for Drone Delivery of Medications and other Healthcare Items,” with J.E.Scott, International Journal of Healthcare Information Systems and Informatics, 13, 3, 20-34, 2018.
• “Drone Delivery Models for Medical Emergencies” with J.E.Scott, Delivering Superior Health and Wellness Management with IoT and Analytics, Healthcare Delivery in the Information Age ,( ed.) N. Wickramasinghe and F. Bodendorf, Springer Nature, Switzerland, 69-85, 2019