Irem Ozkarahan

Dr. Irem Ozkarahan has taught at business schools and in industrial engineering as well as computer science/engineering departments at various universities after receiving her PhD degree in industrial and management systems engineering at Arizona State University in 1987. She has earned the full professor title at various universities since 1998. The list of professional activities and courses she has been teaching for more than thirty years at various universities can be found on her website.

One of the significant moments of her professional life has been serving as a PhD dissertation adviser for eight talented PhD students while she was at Dokuz Eylul University in the department of industrial engineering in Izmir, Turkey. They had created several publications based on their joint research that they had developed together. Dr. Ozkarahan also served as master’s thesis adviser for many other graduate students. She especially enjoys the connection that she has created with her PhD and master’s thesis students. Even after several years, she still corresponds with them, and they have became lifelong friends as well as colleagues.

On the administrative side, she has worked as the department chair of computer engineering as well as vice president of Dokuz Eylul University catering to over 45,000 students in Izmir, Turkey. Here in the United States, she has also worked as department chair of computer science for more than six years at the Montgomery campus of Troy University in Alabama. She retired from Troy University after having served as a tenured full professor for 10 years and then subsequently moved to New York to be near her family.

She joined Fordham university as clinical professor in the operations management area to teach the courses that she enjoys.

Education

• PhD: Industrial and Management Systems Engineering, Arizona State University, Tempe, Arizona
• Master’s: MASc, Industrial Engineering, University of Toronto, Toronto, Canada
• Bachelor’s: Industrial Engineering, Middle East Technical University, Ankara, Turkey

Research interests

• Heuristic Scheduling/New Approaches in Scheduling
• Tabu Search
• Supply Chain Management
• Manpower Scheduling and its Application on Health Care
• Production and Service Operations Management
• Decision Support Systems
• Multiple Objective Decision Making
• Expert Systems Applications in Scheduling
• Operations Research
• Constraint Programming

Publications

Refereed Journal Publications

OZKARAHAN, I, GADDAM, R., "Captcha As Graphical Passwords," International Journal of Computers, Information Technology and Engineering, January 2016. ZEYBEKCAN, N., OZKARAHAN, I., "Constraint Programming Embedded Solution Approach for Aircraft Recovery Problems," International Journal of Computers, Information Technology and Engineering, Vol. 7, No. 2, July-December 2013, pp. 61-74. ZEYBEKCAN, N., OZKARAHAN, I., "Iterative Solution Approach for Integrated Aircraft and Crew Recovery Problems using Constraint Programming," International Journal of Computers, Information Technology and Engineering, Vol. 7, No. 2, July-December 2013, pp. 75-96. EDIS, E. B., OGUZ, C., & OZKARAHAN, I. “Parallel Machine Scheduling with Additional Resources: Notation, Classification, Models and Solution Methods,” European Journal of Operational Research, Vol. 230 No.3, pp.449-463, 2013. EDIS, E. B., & OZKARAHAN, I., “Solution Approaches for a Real-Life Resource-Constrained Parallel machine scheduling problem. The International Journal of Advanced Manufacturing Technology, Vol.58 (9-12), pp. 1141-1153, 2012. EDIS, E. B., OGUZ, C., & OZKARAHAN, I. “Paralel makinelerde işlerin ve makine operatörlerinin birlikte çizelgelenmesi problemine çözüm yaklaşımları,” Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi, Vol. 27, No. 3, pp.527-535, 2012. (Turkish Journal). OZFIRAT, M. Kemal, OZKARAHAN, Irem, “Computer Applications in Underground Mining," International Journal of Computers, Information Technology and Engineering, Vol. 5, No.1, 2011, pp. 9-11. ZEYBEKCAN, N., OZKARAHAN, I., "Airline Scheduling Problems: Overview," International Journal of Computers, Information Technology and Engineering, Vol. 4, No. 2, December 2010, pp. 97-123. TOPALOGLU, S., OZKARAHAN, I., "A Constraint Programming-Based Solution Approach for Medical Resident Scheduling Problems," Computers & Operations Research, Vol. 38, Issue 1, January 2011, pp. 246-255. EDIS, E. B., OZKARAHAN, I., ”A Combined IP/CP Approach to a Resource-Constrained Parallel Machine Scheduling Problem with Machine Eligibility Restrictions,” GENO: Engineering Optimization, Vol. 43, Issue 2, January 2011, pp. 135-157.. OZFIRAT P. M., OZKARAHAN, I, “A Constraint Programming Heuristic for A Heterogeneous Vehicle Routing Problem with Split Deliveries,” Applied Artificial Intelligence, Vol. 24, Issue 4, pp.277-294. 2010. OZKARAHAN, I., TOPALOGLU, S. “Integration of OR and AI: Medical Residency Scheduling Application," International Journal of Computers, Information Technology and Engineering, Vol. 4, No. 1, June 2010, pp. 1-17. OZFIRAT P. M., OZKARAHAN, I., "Integration of Fuzzy Goal Programming and Integer Programming for the Heterogeneous Vehicle Routing Problem with Split Deliveries," International Journal of Computers, Information Technology and Engineering, Vol. 4, No. 1, June 2010, pp.65-69. SELIM H. OZKARAHAN, I., “A Supply Chain Distribution Network Design Model: An Interactive Fuzzy Goal Programming Based Solution Approach,” The International Journal of Advanced Manufacturing Technology, 2008, Vol. 36, pp. 401-418. SELIM, H, ARAZ, C., OZKARAHAN I., “Collaborator Production Distribution Planning in Supply Chain: Fuzzy Goal Programming Approach,” Transportation Research Part E: Logistics and Transportation review (TRE), Vol. 44, Issue 3, pp. 396-419, May 2008. EDIS, E. B., OZKARAHAN, I., “Parallel Machine Scheduling Problem with Additional Resources and Machine Eligibility Restrictions: An Iterative Integer Programming Approach,” International Journal of Computers, Information Technology and Engineering, Vol. 2, No. 1, pp.1-9, June 2008. OZFIRAT P. M., OZKARAHAN, I., "A Heuristic Based on Constraint Programming for the Vehicle Routing Problem with Time Windows,” International Journal of Computers, Information Technology and Engineering, Vol. 2, No. 1, pp.45-51, June 2008. EDIS, E., ARAZ,C., OZKARAHAN,I., "Lagrangian-Based Solution Approaches for a Resource-Constrained Parallel Machine Scheduling Problem With Machine Eligibility Restrictions," The Twenty First International Conference on Industrial Engineering & Other Applications of Applied Intelligent Systems, Lecture Notes in Artificial Intelligence, Springer, June 18-20, 2008, pp. 337-346. OZFIRAT P. M., OZKARAHAN, I., "Comparison of Non-Split and Split Delivery Strategies for the Heterogeneous Vehicle Routing Problem," Industrial Engineering Journal of Turkish Chamber of Engineers and Architects, Vol. 18, Number 4, pp. 2-13, 2007. OZGUR, E. OZKARAHAN, I., “Design of Manufacturing Cells for Uncertain Production Requirements with Presence of Routing Flexibility,” Lecture Notes in Artificial Intelligence, Vol. 4682, pp.670-681, 2007. ARAZ C., OZKARAHAN I., "Supplier Evaluation and Management System for Strategic Sourcing Based on A New Multicriteria Sorting Procedure," International Journal of Production Economics, Vol. 106, No. 2, pp. 585-606, 2007. BILGEN B., OZKARAHAN, I., "A Mixed Integer Linear Programming Model for the Bulk Grain Blending and Shipping Problem," International Journal of Production Economics, Vol. 107, pp. 555-571, 2007. ARAZ C.,SELIM H., OZKARAHAN I., “A Fuzzy Multi-Objective Covering-based Vehicle Location Model for Emergency Services,” Computers and Operations Research, Special Issue on ‘Logistics of Health Care Management’, Vol. 34, Issue 3, March 2007, pp. 705-726. SELIM, H., ARAZ, C., OZKARAHAN, I. "An Integrated Multi-Objective Supply Chain Model In A Fuzzy Environment," Industrial Engineering Journal of Turkish Chamber of Engineers and Architects, Vol. 15, No. 3, September 2004, pp. 2-16. ARAZ C., OZFIRAT P.M., OZKARAHAN I. “An Integrated Multicriteria Decision Making Methodology for Outsourcing Management,” Computers and Operations Research, Focused issue on Operations Research and Outsourcing, Vol. 34, No. 12, 2007, pp. 3738-3756. ARAZ C., OZKARAHAN I., (2006) “Supplier Evaluation and Management System for Strategic Sourcing Based on A New Multicriteria Sorting Procedure”, International Journal of Production Economics, Vol. 106, No. 2, 2007, pp. 585-606. BILGEN B., OZKARAHAN I. "Fuzzy Linear Programming Approach to Multi-Mode Distribution Planning", KES2006, Int. Conf. on Knowledge Based & Intelligent Information & Engineering Systems. Buurnemou Int. Conf. Center Oct. 9-11 2006. Lecture Notes in Artificial Intelligence (LNAI), LNAI 4251, Springer, 2006, pp.37-45. SELIM H., OZKARAHAN, I., "Application of Fuzzy Multi-objective Programming Approach to Supply Chain Distribution Network Design Problem," Lecture Notes in Artificial Intelligence (LNAI) Proceedings, 5th Mexican International Conference on Artificial Intelligence, Mexico, November 13-17, 2006, pp. 415-425. ARAZ C., OZKARAHAN I, “A Multicriteria Sorting Procedure for Financial Classification Problems: the Case of Business Failure Risk Assessment,” Sixth International Conference on Data Engineering and Automated Learning (IDEAL 2005), LNCS Proceedings, 2005, pp. 563-570. TOPALOGLU, Seyda, OZKARAHAN, Irem, “Comparison of Different Variable and Value Order Strategies for the Optimum Solution of a Single Machine Scheduling Problem with Sequence Dependent Setups,” International Symposium of Computer Information Systems ( ISCIS’2004), Lecture Notes In Computer Science (LNCS) Proceedings, Vol. 3280/2004, P.996, October 2004. OZKARAHAN, Irem, et al., “Opportunities for Integration of AI and OR: An Industrial Engineering Perspective,” Advances in Information Systems (ADVIS’2004), Lecture Notes In Computer Science (LNCS) Proceedings, (Invited Speaker for ADVIS’2004), Vol. 3261/2004, pp. 490-511. TOPALOGLU, S., OZKARAHAN, Irem, “An Implicit Goal Programming Model For The Tour-Scheduling Problem Considering The Employee Work Preferences,” The Annals of Operations Research Special Issue on Staff Scheduling and Roistering, 128, pp.135-158, 2004. BILGEN Bilge, OZKARAHAN, Irem, “Strategic and Operational Production Distribution Models: A Review,” The International Journal of Technology Management Special Issue on Supply Chain Management: Integration Strategies based on New Technologies, Vol. 28, No. 2, pp. 151-171, 2004. SELIM Hasan., OZKARAHAN, Irem, “A New Model For The Scheduling Of Emergency Service Vehicles,” Industrial Engineers Journal of Society of Turkish Engineers and Architects, Vol.14, No 1, pp. 18-27, March 2003. TOPALOGLU, S., OZKARAHAN, Irem, “Implicit Optimal Tour Scheduling with Flexible Break Assignments,” Computers and Industrial Engineering, Vol. 44, No. 1, 2003. OZKARAHAN, Irem, “Allocation of Surgeries to Operating Rooms Using Goal Programming,” Journal of Medical Systems, Vol. 24, No. 6, pp. 339-378, 2000. OZKARAHAN, Irem, “Allocation of Surgical Procedures to Operating Rooms,” Journal of Medical Systems, Vol. 19, No. 4, pp. 333-352, 1995. OZKARAHAN, Irem, “A Goal Programming and Analytic Hierarchy Process Based Model For Scheduling Nurses,” Industrial Engineers Journal of Society of Turkish Engineers and Architects, Vol. 5, No. 2, pp. 9-24, March-April 1994. OZKARAHAN, Irem, “A Scheduling Model For Hospital Residents,” Journal of Medical Systems, Vol. 18, No. 5, pp. 251-265, 1994. OZKARAHAN, Irem, “Integrated Nurse Scheduling Model,” American Institute of Industrial Engineers (AIIE) Journal of the Society for Health Systems, Vol. 3 No. 2, pp. 79-101, 1992. OZKARAHAN, Irem, “A Disaggregation Model of A Flexible Nurse Scheduling Support System,” Journal of Socio-Economic Planning Sciences, Vol. 25, No. 1, pp. 9-26, 1991. OZKARAHAN, Irem, “Flexible Nurse Scheduling Support Systems,” Computer Methods and Programs in Biomedicine, Vol. 30, Nos. 2/3, pp.145-153, Oct.-Nov. 1989. OZKARAHAN, Irem, BAILEY, J., “Goal Programming Model Subsystem of A Flexible Nurse Scheduling Support System,” American Institute of Industrial Engineers Journal (AIIE Transactions), Vol. 20, No. 3, pp. 306-316, 1988. BUZACOTT, J. A., OZKARAHAN, I., “One and Two Stage Scheduling of Two Products with Distributed Inserted Idle Time: Benefits of A Controllable Production Rate,” Naval Research Logistics Quarterly, Vol. 30, pp. 675-696,1983.

Refereed Conference Proceedings

OZFIRAT, Pinar, M, EDIS, B. Emrah, OZKARAHAN, Irem, “Comparison of Alternative Modelling Methods for the Operating Room Scheduling Problem with Sequence Dependent Setup Times,” NEDSI 2017 Conference Proceedings, 2017, pp.200-207. OZKARAHAN, I, GADDAM, R., "Captcha As A Graphical Password," Proceedings of Northeast Decision Sciences Conference 2016, p.116. OZKARAHAN, Irem, OZFIRAT Pinar, M, OZFIRAT, M. Kemal, “ LHD Routing Problem in an Underground Mine Working with Block Caving Method”, Proceedings of 3rd Mining Machinery Symposium, May 5-6th, 2011, Izmir, Turkiye, pp. 319-327. OZKARAHAN Irem, OZFIRAT PINAR MIZRAK, OZFIRAT, M. K. “ A Mathematical Modeling Approach for Scheduling Problem of Load-Haul-Dump Vehicles in Underground Mining”, Proceedings of Northeast Decision Sciences Institute Meeting, Montreal Canada, pp. 1136-1143, April 2011. ZEYBEKCAN, N, OZKARAHAN, Irem, “Sequential and Interactive Solution Approach for Aircraft and Crew Recovery Problems”, Proceedings of Northeast Decision Sciences Institute Meeting, Montreal Canada, pp. 1086-1105, April 2011. EDIS, B. Emrah, OZKARAHAN, I., “Parallel Machine Scheduling with Additional Resources and Machine Eligibility Restrictions”, Proceedings of the 1st International Symposium on Computing in Science & Engineering (ISCSE), pp. 330-338, June 3-5 2010, Kuşadası, Türkiye. MIZRAK OZFIRAT PINAR, OZKARAHAN IREM, "A Cell Covering Approach to a Vehicle Routing Problem With Time Window," Proceedings on the New Approaches in Science Symposium (2008), pp. 727-732. OZKARAHAN, I., TOPALOGLU S., "Integration of Operations Research and Artificial Intelligence: Medical Residency Scheduling Application," International Decision Science Conference Proceedings, Nancy, France, June 24-27, 2009, pp. 850-860. OZKARAHAN, Irem, EDIS, B. Emrah, OZFIRAT, MIZRAK, Pinar. "Scheduling Operations to Operating Rooms by Mathematical Modelling,” Decision Science Institute (DSI) 2009 40th Annual Meeting Proceedings, pp. 921-926, Nov. 14-17, 2009, New Orleans, Luisiana, USA. OZKARAHAN, Irem, "AI&OR integration Application on Scheduling Medical Residents," Society for Design & Process Science (SDPS) Proccedings, Nov. 1-5, Montgomery, AL, USA. EDIS E.B., OZFIRAT P. M., OZKARAHAN I., “A Constraint Programming Approach For A Conference Timetabling Problem,” Proceedings of the Thirty-Seventh Annual Meeting of Western Decision Sciences (2008), pp. 603-605, March 2008, San Diego, USA. EDIS, EMRAH, B., OZKARAHAN, I., and YUKSEKOL A.T. “An Integer Programming Approach for a Service Vehicle Cost-Based Staff Scheduling Problem,” An Edited Volume of Accepted and Presented Papers at the 11th International Federation of Automatic Control (IFAC) and Intl. Symposium of Computational Economics & Financial and Industrial Systems (CEFIS) 2007, pp.375-380, October 09-11, Istanbul, Turkey. EDIS, EMRAH, B., OZKARAHAN, I. “Parallel Machine Scheduling with Additional Resources: A Brief Review of the Literature,” An Edited Volume of Accepted and Presented Papers at the 11th International Federation of Automatic Control (IFAC) and Intl. Symposium of Computational Economics & Financial and Industrial Systems (CEFIS) 2007, pp.381-386. October 09-11, Istanbul, Turkey. OZKARAHAN I., EDIS, E. B., OZFIRAT, P. M. “A Web-Based Decision Support System for Elective Course Assignment: An Integer Programming Approach,” Proceedings of the Tenth World Conference on Integrated Design and Process Technology, pp.288-293, June 3-8, 2007, Antalya, Turkey. OZFIRAT, P. M., EDIS, E., OZKARAHAN,I., “Mathematical Modeling Approach For The Course Timetabling Problem Of Dokuz Eylul University Industrial Engineering Department,” Proceedings of International Modeling and Simulation Conference (AMSE'2006), Konya, Turkey. Also, Selcuk Journal of Applied Mathematics, Vol. 7, No 2, 2006. EDIS, R. S., OZFIRAT P. M., OZKARAHAN, I., “Experimental Design of Tabu Search Factors Applied in Parallel Machine Scheduling,” Proceedings of the 35th International Conference on Computers & Industrial Engineering (IE)-2005, June 2005 Istanbul Turkey, pp. 549-554. OZFIRAT, P, M., ARAZ, C., OZKARAHAN, I., Application of Fuzzy Goal Programming Approach To Supplier Selection Problem in Textile Industry, Proceedings of the 35th International Conference on Computers & Industrial Engineering (IE)-2005, June 2005 Istanbul Turkey, pp. 1469-1474. OZFIRAT, P., M., OZKARAHAN, I., “A Mathematical Approach to the Integration of Exam Timetabling and Proctor Scheduling Problem,” Proceedings of the 35th International Conference on Computers & Industrial Engineering (IE)-2005, June 2005, Istanbul Turkey, pp. 1505-1510. EDIS B. E. , ARAZ, C., OZKARAHAN, I., “A Lagrangean Based Solution Approach For A Resource- Constrained Parallel Machine Scheduling Problem,” Proceedings of the 35th International Conference on Computers & Industrial Engineering (IE)-2005, June 2005 Istanbul Turkey, pp. 555-560. BILGEN, B., OZKARAHAN, I., “Comparison of the Two Different Types of Data Modeling Structure for Distribution Network Planning in a Wheat Supply Chain,” Proceedings of the 35th International Conference on Computers & Industrial Engineering ( IE )-2005, June 2005 Istanbul Turkey, pp. 303-308. SELIM, H., OZKARAHAN, I., ARAZ, C., “A Maximal Covering Based Distribution Network Design Model in Supply Chain,” Proceedings of the 35th International Conference on Computers & Industrial Engineering (IE)-2005, June 2005 Istanbul Turkey, pp. 1717-1728. BILGEN, B., OZKARAHAN, I., “Distribution Planning Problem Using Linear Programming Method,” Proceedings of International Logistic Congress, pp. 124-132, 2-3 December, 2004, Izmir, Turkey. BILGEN, B., OZKARAHAN, I., “Distribution Planning Problem: A Survey,” Proceedings of Operations Research 2003 Selected Papers of the International Conference on Operations Research (OR 2003), pp: 39-46, Heidelberg, September 3-5., 2003. BILGEN, B., OZKARAHAN, I., “Mixed Integer Programming Based Production and Distribution Models: A Review,” Proceedings of International Logistic Congress, pp.106-112, June 30-July 01, 2003, Istanbul Turkey BILGEN, B., OZKARAHAN, I., “Simulated Annealing Technique for Single Machine Scheduling Problem,” The 30th International Conference on Computers and Industrial Engineering, pp. 95-100, June 29 - July 2, 2002 Tinos Island, Aegean Sea, Greece. TASAN, S., OZKARAHAN, Irem, “Operating Room Scheduling Expert System,” Proceedings of the International Conference on Industry, Engineering, and Management Systems (IEMS) & the International Conference on Computers and Industrial Engineering (ICC&IE) 2001 Joint Meeting, pp.19-24, March 5-7 2001, Florida. TASAN, Serdar, OZKARAHAN, Irem, “An Expert System for Operating Room Scheduling,” Proc. of 3rd National Health and Hospital Management Symposium, pp. 293-302, September 29-29 2000, Ankara. BILGEN, B., OZKARAHAN, Irem, “Tabu Search Technique for Single Machine Scheduling Problem,” Proc. of Decision Sciences Institute's National Conf., p. 1104, November 2000, Florida. TOPALOGLU, S., OZKARAHAN, Irem, “A Goal Programming Approach for Large-Scale Tour Scheduling Problems With Flexible Break Assignments,” Proc. of Decision Sciences Institute's National Conf., pp. 1259-1261, November 2000, Florida. SELIM, H., OZKARAHAN, Irem, “Emergency Medical Service Vehicle Deployment Model,” Proceedings of Decision Sciences Institute's National Conf., pp. 1284-1286, November 2000, Florida. OZKARAHAN, Irem, TOPALOGLU, Seyda, “Optimization Based Modeling for Tour Scheduling with Flexible Break Windows,” 7th Annual Industrial Engineering Research Conference. May 9-10 1998, Banff, Alberta, Canada. (Proc. is in CD ROM form). OZKARAHAN, Irem, Kenar, O., “A Computer Based Nurse Scheduling Model,” Proceedings of Turkish Operations Research/Industrial Engineering Society's Conference, pp.61-64, October 96. OZKARAHAN, Irem, “A Flexible Hospital Resource Scheduling Model,” Proceedings of Decision Sciences Institute's National Conf., November 1996, pp.1030-1032, Orlando. OZKARAHAN, Irem, Kural, E., “A Zero one GP Based Model for Scheduling Hospital Residents,” Proceedings of Systems Engineering and Military Applications Conf., October. 1995, pp. 1123-1138, Ankara. OZKARAHAN, Irem, “A Modeling Approach for Scheduling Hospital Residents,” Proceedings of Decision Sciences Institute's National Conference, November 1995, pp. 1512-1514, Boston. OZKARAHAN, Irem, “An Hospital Resource Scheduling System,” Proceedings of Decision Sciences Institute's National Conference, Vol. 2, Nov. 1993, pp. 1081-1083, Washington, D.C. OZKARAHAN, Irem, “An Optimization Model For Operating Room Utilization,” Proceedings of Northeast Decision Science Institute Conference, April 1993, pp. 345-347, Philadelphia. OZKARAHAN, Irem, “The Zero-One Goal Programming Model of a Flexible Nurse Scheduling Support System,” Proc. of Intl. Industrial Engineering Conference, May 1989, pp.436-441, Toronto. OZKARAHAN, Irem, “Flexible Nurse Scheduling Support Systems,” Proceedings of IEEE SCAMC Symposium on Computer Applications in Medical Care, Nov. 1987, pp. 387-392, Washington D.C. Ph.D. Student paper competition finalist.

Book chapter

OZKARAHAN I., EDIS E.B., MIZRAK OZFIRAT P., 2013, “Operating Room Management in Health Care: Operations Research and Artificial Intelligence Approaches,” Information and Communication Technologies (ICTs) and Management Systems for Improving Efficiency in Healthcare and Social Care, Eds. Cruz-Cunha M.M., Miranda M.I., Gonçalves P., IGI Global, USA, pp. 518-538.

Refereed Abstract Publications

OZKARAHAN, Irem, et al., “Comparison of Split Delivery and Capacitated Vehicle Routing Problems: An Application of Fresh Goods Distribution,” 27th National Operations Research/Industrial Engineering Meeting, June 2-4, 2007, Izmir, Turkey. OZKARAHAN, Irem, et al., “A Goal Programming Approach for Developing Monthly Work Schedules of Operation Nurses in Dokuz Eylul University,” 27th National Operations Research/Industrial Engineering Meeting, June 2-4, 2007, Izmir, Turkey. OzKARAHAN, Irem, et al., “Real Time Operation Room Scheduling in Dokuz Eylul University Central Operation Unit,” 27th National Operations Research/Industrial Engineering Meeting, June 2-4, 2007, Izmir, Turkey. OZKARAHAN, Irem, BUZACOTT, J. A., “Two-product Two-stage Production Scheduling with Distributed Inserted Idle Time,” Published abstract ORSA/TIMS Conf., Miami, October 1977. OZKARAHAN, Irem., “Two-product Two-stage Deterministic Inventory Control,” Turkish Operations Research Society's Conference, 1978. OZKARAHAN, Irem., “Application of a New Coordination Methodology and its Results in the Municipality of Ankara,” Turkish Operations Research Society's Conference, 1980. OZKARAHAN, Irem., Model Concepts in Operations Research, Technical Report of Ministry of Transportation, 1978. OZKARAHAN, Irem, BAILEY, J., “Two Stage Optimization in Nurse Scheduling Published Abstract,” The Institute of Management Science and Operations Research Society of America (TIMS/ORSA Conference) Los Angeles, April 1986. OZKARAHAN, Irem, BAILEY, J., “Goal Programming Model Subsystem of A Flexible Nurse Scheduling Support System,” Published Abstract ORSA/TIMS Conference, Miami, October 1986. OZKARAHAN, Irem, BAILEY, J., “Linear Programming Model of the Model Subsystem of Flexible Nurse Scheduling,” Published Abstract ORSA/TIMS Conference, St. Louis, October 1987. OZKARAHAN, Irem, “A Disaggregation Model of a Nurse Scheduling Support System,” Published Abstract ORSA/TIMS Conference, Denver, 1988. OZKARAHAN, Irem, “A Zero One Goal Programming Model for Scheduling Nurses,” Published Abstract TIMS/ORSA Conference, Las Vegas, May 1990. OZKARAHAN, Irem, “A Resident Scheduling Model,” Published Abstract ORSA/TIMS Conference Philadelphia, October 1990. OZKARAHAN, Irem, Slezak, J., “An Automated Process Planning for Forging Industry,” Published abstract ORSA/TIMS Conference, Anaheim, November 1991. OZKARAHAN, Irem, Slezak, J., “An Expert System Application in the Forging Industry,” Published abstract in the Conference Proceedings of Production and Operations Management Society (POMS) Conference, New York City, November 1991. OZKARAHAN, Irem, “An Expert Scheduling System,” Published abstract, TIMS/ORSA, Chicago, May 1993 OZKARAHAN, Irem, “Industrial Engineering Education in Turkey,” panelist, April 1994, and published in Industrial Engineers Journal of Society of Turkish Engineers and Architects, Vol. 5, No. 3, pp. 24-29, May-June 1994. TANIK, Y., OZKARAHAN I., “A Goal Programming Approach for Operating Room Scheduling,” Turkish Operations Research/Industrial Engineering Conference, Ankara, July 1995. SEZEN, F., OZKARAHAN, I., “An Expert System For Production Planning,” Turkish Operations Research/Industrial Engineering Conference, Ankara, July 1995. ERTURER, E., OZKARAHAN, I., “A Scheduling Application In A Textile Industry,” Turkish Operations Research/Industrial Engineering Conference Ankara, July 1995. OZKARAHAN, Irem, “Computer Based Hospital Resource Scheduling System,” Machine Magazine, May 1996, pp.80-82. TOPALOGLU, S., OZKARAHAN, I., “An Integer Programming Model for Personnel Scheduling in Service Industry”, Turkish Operations Research/Industrial Engineering Conference, Ankara, June 1998. TOPALOGLU, S., OZKARAHAN, I., “A Multi Criteria Decision Model for Personnel Scheduling in Service Industry,” Turkish Operations Research/Industrial Engineering Conference, Ankara, June 1999. SELIM, H., OZKARAHAN, I., “An Emergency Vehicle Scheduling Model,” Turkish Operations Research/Industrial Engineering Conference, Ankara, June 1999. BILGEN, B., OZKARAHAN, I.,” A Tabu Search Algorithm for A Single Machine Total Tardiness Problem,” Turkish Operations Research/Industrial Engineering Conference, Ankara, June 1999. TOPALOGLU, S., OZKARAHAN, I., “Solving Constraint Satisfaction Problems by Constraint Programming,” Turkish Operations Research/Industrial Engineering Conference, Cyprus, June 2000. TOPALOGLU, S., OZKARAHAN, I., “A Two-Phase Solution Approach for the Hospital Resident Scheduling Problem Using Constraint and Mixed-Integer Programming,” EURO/ Institute for Operations Research and Management Science Society of America (INFORMS) Joint International Meeting, 6-10 July 2003, Istanbul, TURKEY TOPALOGLU, S., OZKARAHAN, I., “Comparison of Different Search Heuristics Proposed for a Constraint-Based Solution Approach to the Job Sequencing Problem,” International Conference on Operations Research, University of Heidelberg, Germany, 3-5 Sept. 2003. BILGEN, B., OZKARAHAN, I., “Mixed Integer Programming Approach for Distribution Planning Problem,” International Conference on Operations Research, University of Heidelberg, Germany, 3-5 Sept. 2003, p.67.