Doç. Dr.

ofahrettin.demirel@ihu.edu.tr

Eğitim

Lisans : Lisans, Marmara Üniversitesi, İşletme (İngilizce), İstanbul, 1992
Yüksek Lisans : Yüksek Lisans, Rensselaer Polytechnic Institute, Yöneylem Araştırması ve İstatistik, Troy, USA, 1995
Doktora : Doktora, Rensselaer Polytechnic Institute, Karar Bilimleri ve Mühendislik Sistemleri, Troy, USA, 1995

Biyografi

Ömer F. Demirel lisans derecesini Marmara Üniversitesi İngilizce İşletme Bölümü’nden aldı. Yöneylem araştırması ve istatistik yüksek lisans derecesi ile Karar Bilimleri ve Mühendislik Sistemleri doktorasını A.B.D.’den Rensselear Polytechnic Institute’dan aldı. Sakarya Üniversitesi İşletme Bölümü’nde Yardımcı Doçent olarak görev yapti. Kral Fahd ve Fatih Üniversiteleri’nin Endüstri Mühendisliği bölümlerinde yardımcı doçent olarak çalıştı. Son olarak İstanbul Teknik Üniversitesi’nde İşletme Fakültesi bünyesinde Endüstri Mühendisliği bölümünde Doç. Dr. olarak çalışmaktaydı. Temel araştırma alanları arasında üretim yönetimi, tahminleme, tedarik zinciri yönetimi ve zaman serileri analizi yer almaktadır.

Akademik Yayınlar

Uluslararası hakemli dergilerde yayınlanan makaleler

  1. Ogcu, G., Demirel O.F., “Parameter optimization of intermittent demand forecasting by using spreadsheet”, Kybernetes, 44(4), 576-587, 2015.
  2. Zaim, S., Sevkli, M., Akdag, H., Demirel, O.F., Yayla, Y., Delen, D., “Use of ANP weighted crisp and fuzzy QFD for product development”, Expert Systems with Applications, 41(9), 4464-4474, 2014.
  3. Turkyilmaz, A., Oztekin, A., Zaim, S., Demirel, O.F., “Universal structure modeling approach to customer satisfaction index”, Industrial Management & Data Systems, 113(7), 932-949, 2013.
  4. Camgoz-Akdag, H., Zaim, S., Acar, M.F., Demirel, O.F., Ataman, A., “Product Improvement with Quality Function Deployment (QFD) Technique”, Advanced Materials Research, 445, 1058-1063, 2012.
  5. Demirel, O.F., Zaim, S., Caliskan, A., Ozuyar, P., “Forecasting Natural Gas Consumption in Istanbul Using Neural Networks and Multivariate Time Series Methods”, The Turkish Journal of Electrical Engineering & Computer Sciences, 20, 695-711, 2012.
  6. Zaim, S., Turkyilmaz, A., Acar, M.F., Al–Turki, U., Demirel, O.F., “Maintenance Strategy Selection: A case Study”, Journal of Quality in Maintenance Engineering, 18(1), 16-29, 2012.
  7. Zaim, S., Demirel, O.F. & Oğcu, G. “Forecasting Electricity Consumption with Neural Networks and Support Vector Regression”, Procedia – Social and Behavioral Sciences, 12(58), 1576-1585, 2012.
  8. Demirel, O.F., Willemain T.R., “Nonparametric Methods of Process Discrimination and Model Validation Using Zero Crossings”, Communications in Statistics – Simulation and Computation, 32(2), 517-539, 2003.
  9. Demirel, O.F., Willemain, T.R., “A Turing Test of Bootstrap Scenarios”, Journal of Computational and Graphical Statistics, 11(4), 896-909, 2002.
  10. Demirel O.F., Willemain, T.R., “Generation of Simulation Input Scenarios using Bootstrap Methods”, Journal of the Operational Research Society, 53, 69-78, 2002. 
  11. Sahin M., Kizilaslan R., Demirel O.F., “Forecasting Aviation Spare Parts Demand Using Croston Based Methods and Artificial Neural Networks”, Journal of Economic and Social Research, 15(2), 2013.
  12. Zaim, S., Demirel, O.F., Oğcu, G., “Forecasting Electricity Consumption with Neural Networks and Support Vector Regression”, Procedia Social and Behavioral Sciences, 1576-1585, 2012.
  13. Zaim S., Turkyilmaz A., Acar M.F., Al-Turki U., Demirel O.F., “Maintenance strategy selection using AHP and ANP algorithms: a case study”, Journal of Quality in Maintenance Engineering, 18(1), 16–29, 2012.
  14. Akkurt M., Demirel O.F., Zaim S., “Forecasting Turkey’s Natural Gas Consumption by Using Time Series Methods”, European Journal of Economic and Political Studies, 3, 2010.
  15. Al-Turki U.M., Duffua S., Ayar T., Demirel O., “Stakeholders integration in higher education: supply chain approach”, European Journal of Engineering Education, 33(2), 211-219, 2008.

 

Yazılan uluslararası kitaplar veya kitaplarda bölümler

  1. Gorener R., Demirel, O.F. Norsworthy J.R., “Bank and Financial Market Efficiency: Global Perspectives Research in Banking and Finance”, pp. 237-252, “Replicating Patterns in Autocorrelated Financial Time Series”, JAI Press, 2004.
  2. Zengin, H., Demirel, O.F., “Sürdürülebilir Rekabet Avantajı Elde Etmede Enerji Sektörü Sektörel Stratejiler ve Uygulamalar”, ss. 1117-1134, “Enerji Sektörü Kümelenmelerinde Özelleştirilmiş Altyapı Sağlayıcıları: Enerji Sektöründe E-Ticaret”, Uluslararası Rekabet Kurumu Derneği, 2010.
  3. Manuel, P.D., Demirel, O.F., Zengin, H., William, A., “User Interface Design of eCommerce for SMEs”, 4th International Conference on Internet Computing, Las Vegas, Nevada, USA, pp. 543-546, 2003. 

 

Uluslararası bilimsel toplantılarda sunulan ve bildiri kitabında basılan bildiriler

  1. Ervural, B.C., Zaim, S., Aydın, Z., Demirel, O.F., “A Strategic Energy Planning for Turkey by Using ANP Weighted TOPSIS Methodology”, Conference on Engineering And Technology Management GCETM-2015.
  2. Ogcu-Kaya, G., Demirel, O.F., Zaim, S., Gorener, R., “Day-ahead Electricity Price Forecasting Using a Wavelet-Support Vector Machine Conjunction Model”, Conference on Engineering and Technology Management GCETM-2015.
  3. Ervural, B.C., Evren, R., Demirel, O.F., “Forecasting Energy Consumption in Turkey Using Regression Analysis and Arima Models”, Conference on Engineering and Technology Management GCETM-2015.
  4. Ünal, Y.Z., Al-Turki, U.M., Zaim, S., Demirel, O.F., Görener R., “Developing spreadsheet models of Holt-Winter methods and solving with Microsoft Excel solver and differential evaluation technique: An application to tourism sector”, Industrial Engineering and Operations Management Conference (IEOM), 2014.
  5. Bulu, M., Demirel, O.F., Özüyar, P., “Forecasting natural gas consumption using support vector regression model: a case study of greater metropolitan region of Istanbul”, Lookus Scientific, 2013.
  6. Demirel, O.F., Zengin H, “Applications of E-Commerce for small and medium enterprises”, The International Conference on Information & Computer Science ICICS’2004, Dhahran, Saudi Arabia, pp. 131-138, 2004.
  7. Manuel, P.D., Demirel, O.F., Zengin, H., William, A., “User Interface Design of eCommerce for SMEs”, 4th International Conference on Internet Computing, Las Vegas, Nevada, USA, pp. 543-546, 2003.
  8. Norsworthy, R., Demirel, O.F., Gorener, R., “Bootstrapping Autocorrelated Financial Time Series”, IEEE-EMS 2001 Conference Proceedings, Albany/ABD, pp. 430-439, 2001.
  9. Willemain, T.R. and Demirel O.F., “Bootstrap Methods for Generation of Simulation Input Scenarios”, 2000 NSF Design and Manufacturing Research Conference, Vancouver/Canada, Proceedings of the 2000 NSF Design and Manufacturing Research Conference, 2000.
  10. Willemain, T.R, Demirel, O.F., “Simulation input modelling: trace + bootstrap”, Annual industrial engineering research conference, Phoenix, AZ, 1999.
  11. Willemain, T.R., Demirel, O.F, “Indirect inference: scenario generation using bootstrap”, INFORMS, Montreal, 1998.

 

Ulusal bilimsel toplantılarda sunulan ve bildiri kitabında basılan bildiriler

  1. Oğcu, G., Göçeri, M.S., Çapraz, A.G., Demirel O.F., “Developing Industrial Engineering Ph. D. Program With AHP Based QFD”, İzmir, 12. Üretim Araştırmaları Sempozyumu, 2012.
  2. Şahin, M., Demirel, O.F., Kızılaslan, R., “Forecasting intermittent demand with neural networks”, 2nd International Symposium on Computing in Science & Engineering, Kusadasi, Aydın, Türkiye, 2011.
  3. Zaim, S., Demirel, O.F., Akdag, H.C., Acar, M.F., Yavuz, Y.Z., “Product Improvement with Qfd”, 14th Internatıonal Conference on Advances in Materıals & Processing Technologies, Istanbul – Turkey, 2011.
  4. Uyanık, S., Kızılaslan, R., Temizer, L., Çengel A., Elmas, E.M., Demirel, O.F., “Dealing with Uncertainty in Supplier Selection, 1st International Symposium on Computing in Science & Engineering, Kusadası, Aydın, Turkey, 2010.
  5. Zengin, H., Demirel, O.F., “Türk Yöneticilerini Pazarlamaya Bakışları”, III. Ulusal Bilgi, Ekonomi ve Yönetim Kongresi, Eskişehir-Türkiye, 2004.
  6. Zengin, H., Ozkan, Y., Demirel, O.F., “QFD Metodolojisine Yeni Bir Uygulama Alanı: CRM”, I. National Quality Deployment Function Symposium, İzmir-Türkiye, 2002.
  7. Zengin, H., Ozkan, Y., Demirel, O.F., “How can a Small Enterprise Reach to the Global Markets”, The First Annual SME-2002 Conference, Mersin-Türkiye, 2002.