FACULTY of ARTS AND SCIENCESDEPARTMENT OF STATISTICS


Publications / Yayınlar

 

WORK IN PROGRESS

 

Has Climate Been Changing in Turkey? A Comparative Statistical Analysis of Two Consecutive Time Periods: 1950-1980 and 1981-2010. Yozgatlıgil, C., İyigün, C., Kartal-Koç, E., Fahmi, F., Aslan, S., Türkeş, M. and İ. Batmaz. International Journal of Climatology.

 

Modeling Precipitation Data of Certain Regions for Turkey via Hidden Markov Models. Yaman, N., Batmaz, İ. and C. Yozgatlıgil.

 

Data Mining Approaches to Meteorological Data: A Review of NINLIL Climate Research Group Studies. Batmaz, İ.


PAPERS PUBLISHED

2015-2014

Comparison of homogeneity tests for temperature using a simulation study. Yozgatlıgil, C. and C. Yazici. International Journal of Climatology. 2015DOI: 10.1002/joc.4329.

 

Precipitation Modeling by Polyhedral RCMARS and Comparison with MARS and CMARS. Özmen, A., Batmaz, İ., and G.-W. Weber. Environmental Modeling and Assessment. 2014, 19, 425-435.

 

2013-2012

Clustering Current Climate Regions of Turkey by Using a Multivariate Statistical Method. İyigün, C., Türkeş, M., Batmaz, İ., Yozgatlıgil, C. Purutçuoğlu-Gazi, V., Kartal-Koç, E., and M.Z., Öztürk. Theoretical and Applied Climatology. 2013, 114 (1), 95-106.

 

Comparison of Missing Value Imputation Methods for Turkish Meteorological Time Series Data. Aslan, S., Yozgatlıgil, C., İyigün, C., and İ. Batmaz. Theoretical and Applied Climatology. 2013, 112, 143–167.

 

2011

Performance Comparison of Missing Data Imputation Methods in Meteorological Time Series Using Correlation Dimension Analysis (in Turkish). Aslan, S., Yozgatlıgil, C., İyigün, C., Batmaz, İ., and H. Tatlı. Journal of Statistical Research. 2011, 8 (2), 55-67.

 

Identifying Climate Regions of Turkey Using Hierarchical Clustering Method (in Turkish). Fahmi, F., Kartal-Koç, E., İyigün, C., Türkeş, M., Yozgatlıgil, C., Purutçuoğlu, V., Batmaz, İ., and G. Köksal. Journal of Statistical Research . 2011, 8 (1), 13-25.

 

CHAPTERS in BOOKS

2011

Determining the Climate Zones of Turkey by Center-Based Clustering Methods. Fahmi, F., Kartal, E., İyigün, C., Türkeş, M., Yozgatlıgil, C., Purutçuoğlu, V., Batmaz, İ., and G. Köksal. In: Nonlinear and Complex Dynamics: Applications in Physical, Biological and Financial Systems. J.A. Tenreiro Machado, Baleanu, D. and A.C.J. Luo (Eds.). New York: Springer, 2011, 171-178.

 

 Overview of Knowledge Discovery in Databases Process and Data Mining for Surveillance Technologies and EWS. Batmaz, İ., and G. Köksal. In: Surveillance Technologies and Early Warning Systems: Data Mining Applications for Risk Detection. A.S. Koyuncugil and N. Özgülbaş (Eds.).

Hershey, PA: IGI Global Publisher (Idea Group Publisher), 2011, 1-30.

 

PAPERS PUBLISHED in PROCEEDINGS

2015-2014

A Bootstrap Application on the Standard Normal Homogeneity Test (SNHT) when there is not Highly Correlated Reference Series. Yazıcı, C., Batmaz. İ. and C. Yozgatlıgil. Proceedings of 60th World Statistics Congress-ISI 2015. Rio de Janeiro, Brazil, 26-31 July, 2015.

 

Consensus Clustering of Time Series Data, İ. Batmaz ,Yetere-Kurşun, A. and İyigün, C. Proceedings of COMPSTAT 2014: 21st International Conference on Computational Statistics and 5th IASC World Conference. Geneva, Switzerland, August 19-22, 2014. 665-672.

 

2012-2011

Seasonal Variation of Turkey: A Consensus Clustering Approach. Yetere-Kurşun, A., İyigün, C., Yozgatlıgil, C., and İ. Batmaz. FLINS 2012: 10th International FLINS Conference on Uncertainty Modeling in Knowledge Engineering and Decision Making. İstanbul Technical University, Maçka Campus, İstanbul, Turkey. 26-29 August, 2012. CDROM.

 

Studying the Effect of Climate Change on Turkey by Clustering Methods (in Turkish). Fahmi, F., Kartal, E., İyigün, C., Yozgatlıgil, C., Çınar, İ., Aslan, S., Öztürk, M.Z., Türkeş, M., and İ. Batmaz. Geography Conference with International Participation . İstanbul, Turkey. 7-10 September, 2011. CDROM.

 

Validity of Homogeneity Tests for Meteorological Time Series Data: A Simulation Study. Yozgatlıgil, C., Purutçuoğlu, V., Yazıcı, C., and İ. Batmaz. 58th ISI World Statistics Congress. Dublin, Ireland. August, 2011. Memory Stick. (http://isi2011.congressplanner.eu/)

 

PAPERS PUBLISHED in ABSTRACT BOOKS

 

2015 (accepted for presentation)

Developing Absence-Presence Models of Precipitation Data for Certain Regions of Turkey by Hidden Markov Models (in Turkish). Yaman N., Yozgatlıgil, C. and İ. Batmaz. YAEM: 35th National Congress of Operations Research and Industrial Engineering, Ankara, Turkey, September 9-11, 2015.

 

Modeling Precipitation Amounts for Certain Regions of Turkey by Hidden Markov Models (in Turkish). Yozgatlıgil, C., Batmaz, İ. and N. Yaman. YAEM: 35th National Congress of Operations Research and Industrial Engineering, Ankara, Turkey, September 9-11, 2015.

 

Determining Different Regimes Using Nonlinear Time Series with a Threshold Value Model: An Application on Turkey Precipitation Data (in Turkish). Aslan, S., Yozgatlıgil, C., İyigün, C. and İ. Batmaz. YAEM: 35th National Congress of Operations Research and Industrial Engineering, Ankara, Turkey, September 9-11, 2015.

 

The Precipitation Modeling of Aegean Region of Turkey with Multivariate Adaptive Regression Splines and Time Series Regression. Yazıcı, C., Batmaz, İ. and C. Yozgatlıgil. 27th European Conference on Operational Research. Glasgow, UK, 12-15 July, 2015.

 

Modeling Daily Occurrence of Precipitation for Certain Regions of Turkey Using Hidden Markov Models (HMMs). Batmaz, İ., Yaman, N. and C. Yozgatlıgil. 27th European Conference on Operational Research. Glasgow, UK, 12-15 July. 2015.

 

2014-2011

Precipitation Prediction by Hidden Markov Models. Batmaz, İ., Sivrikaya, N., Yazıcı, C., and C. Yozgatlıgil. IFORS 2014: 20th Conference of the International Federation of Operational Research Societies. Barcelona, Spain, 13-18 July, 2014.

 

Modeling the Extreme Precipitation Data: Case Study from Turkey. Aksoy, B., Purutçuoğlu, V., Batmaz, İ., and C. Yozgatlıgil. 26th European Conference on Operational Research-INFORMS. Rome, Italy. July 1-4, 2013, 221.

 

Developing Precipitation Models for Continental Central Anatolia, Turkey. Aykan, F., Kartal-Koç, E., Yozgatlıgil, C., İyigün, C., Purutçuoğlu-Gazi, V., and İ. Batmaz. 25th European Conference on Operational Research. Vilnius, Lithuania. 8-11 July, 2012, 208.

 

Detection of Seasonal Changes in Climate Data by Comparative Analysis: A case Study for Turkey. Akay, T., Fahmi, F., Kartal-Koç, E., Purutçuoğlu-Gazi, V., İyigün, C., Yozgatlıgil, C., and İ. Batmaz. 25th European Conference on Operational Research. Vilnius, Lithuania. 8-11 July, 2012, 208.

 

Developing precipitation models for continental central Anatolia, Turkey. Aykan, F., Kartal-Koç, E., Yozgatlıgil, C., İyigün, C., Purutçuoğlu, V., İ. Batmaz. 25th European Conference on Operations Research. Vilnius, Lithuania. July 8-11 July, 2012, 204.

 

Analysis of Extreme Precipitation Events in Turkey. Asar, Ö., Yozgatlıgil, C., Kartal, E., and İ. Batmaz. 7. International Statistics Congress (ISKON). Antalya, Turkey. April 28 – May 1, 2011, 164-165.

Homogeneity Analysis for Dependent Climate Data. Yazıcı, C., Purutçuoğlu, V., Yozgatlıgil, C., Batmaz, İ., and K. Bayramoğlu. 7. International Statistics Congress (ISKON). Antalya, Turkey. April 28 – May 1, 2011, 194-195.

 

2010

Comparison of Missing Value Imputation Methods for Turkish Monthly Total Precipitation Data. Aslan, S., Yozgatlıgil, C., İyigün, C., Batmaz, İ., Türkeş, M., and H. Tatlı. 9th International Conference Computer Data Analysis and Modeling: Complex Stochastic Data and Systems. Minsk, Belarus. 7-11 September, 2010, 137-140.

 

Comparing Missing Imputation Methods in Time Series: An Application on Turkey Climate Data (in Turkish). Yozgatlıgil, C., Aslan, S., İyigün, C., Batmaz, İ., Türkeş, M., and Tatlı, H. YAEM’2010: 30th National Congress of Operations Research and Industrial Engineering. İstanbul, Turkey. 30 June-2 July, 2010, 127.

 

Nonlinear Dynamic Time Series Analysis and Use of Correlation Dimension as a Performance Criterion for Comparing Missing Data Imputation Methods (in Turkish). Aslan, S., Yozgatlıgil, C., İyigün, C., Batmaz, İ., and Tatlı, H. İGS’2010: 7. Statistics Days Symposium. Ankara, Turkey. 28-30 June, 2010, 100-102.

 

A Simulation Study on the Usability of SNHT Homogeneity Test for Precipitation Data (in Turkish). Yozgatlıgil, C., Purutçuoğlu, V., Yazıcı, C., and İ. Batmaz. İGS’2010: 7. Statistics Days Symposium. Ankara, Turkey. 28-30 June, 2010, 32-34.

 

Analysis of Turkey Precipitation Data from 1950 to 2006 Using Descriptive Data Mining Techniques (in Turkish). Asar, Ö., Kartal-Koç, E., Aslan, S., Öztürk, M. Z., Yozgatlıgil, C., Çınar, İ., Batmaz, İ., Köksal, G., Türkeş, M., and H. Tatlı. İGS’2010: 7. Statistics Days Symposium. Ankara, Turkey. June 28-30, 2010, 77-79.

 

Identifying Climate Regions of Turkey Using Hierarchical Clustering Method (in Turkish). Fahmi, F, M., Kartal-Koç, E., İyigün, C., Türkeş, M., Yozgatlıgil, C., Purutçuoğlu, V., Batmaz, İ., and G. Köksal. İGS’2010: 7. Statistics Days Symposium. Ankara, Turkey. June 28-30, 2010, 137-138.

 

PRESENTATIONS

2012-2011

A Simulation Study on the Performances of Homogeneity Tests Applied in Meteorological Studies. Yazıcı, C., Yozgatlıgil, C., and İ. Batmaz. ICACM-International Conference on Applied and Computational Mathematics. METU, Ankara, Turkey. October 3-6, 2012.

 

Analyzing the Long-term Projections of Precipitation Totals via Linear and Nonlinear Time Series Models. Aslan, S., Yozgatlıgil, C., İyigün, C., and İ. Batmaz. ICACM-International Conference on Applied and Computational Mathematics. METU, Ankara, Turkey. October 3-6, 2012.

 

Investigating the Seasonal Patterns of Continental Central Anatolia by Clustering. Akal, T., Purutçuoğlu Gazi, V., Batmaz, İ., Kartal Koç, E., İyigün, C., Yozgatlıgil C. 25th Conference of European Chapter on Combinatorial Optimization, Antalya, Turkey. 26-28 April, 2012.

 

Spectral Clustering on Time Series Data. Aslan, S., C. İyigün., C. Yozgatlıgil., İ. Batmaz. 25th Conference of European Chapter on Combinatorial Optimization, Antalya, Turkey. 26-28 April, 2012.

 

The Effect of Urban Land Cover Change around the Observation Sites on Temperature. Çınar, İ., Yozgatlıgil, C., and İ. Batmaz. International Symposium on Environmental Protection and Planning: Geographic Information Systems (GIS) and Remote Sensing (RS) Applications (ISEPP). Gediz University, İzmir, Turkey. 28-29 June 2011.

 

RESEARCH REPORTS

Technical Reports

Homogeneity Analysis of Turkish Climate Data. Yazıcı, C., Purutçuoğlu, V., Yozgatlıgil, C., Bayramoğlu, K., İyigün, C., and İ. Batmaz, METU-STAT-Technical Report-2012- 001 March, 2012

 

Comparison of Missing Value Imputation Methods in Time Series: The Case of Turkish Meteorological Data. Yozgatlıgil, C., Aslan, S., İyigün, C., and İ. Batmaz METU-STAT-Technical Report-2011- 002 October, 2011

 

THESES SUPERVISED

MSc Theses

  

Continuing

Aksoy, B., Developing Extreme Precipitation Models for Turkish Climatological Dataset. Department of Statistics, METU, Ankara, Turkey. Principal Advisor: Assist. Prof. Dr. Vilda Purutçuoğlu-Gazi. Co-Advisor: Prof. Dr. İ. Batmaz. 2012-ongoing.

 

Aykan, F., Time Series Regression Modeling of Rare Turkish Precipitation. Department of Statistics, METU, Ankara, Turkey. Principal Advisor: Prof. Dr. İ. Batmaz. Co-Advisor: Assist. Prof. Ceylan Talu-Yozgatlıgil. 2011-ongoing. (Supported by METU BAP)

 

Completed

Sivrikaya, N., Modeling Precipitation Series of Turkey with Hidden Markov Models (HMMs). Principal Advisor: Prof. Dr. İ. Batmaz. Co-Advisor: Assist. Prof. Ceylan Talu-Yozgatlıgil. 2015 (Supported by METU BAP)

 

Yetere-Kurşun, A., Ensemble Clustering of Turkish Meteorological Data. IAM, METU, Ankara, Turkey. Principal Advisor: Prof. Dr. İ. Batmaz. Co-Advisor: Assist. Prof. Cem İyigün. 2014. (Supported by METU BAP)

 

Aslan, S.  Comparison of missing value imputation methods for meteorological time series data. METU, Department of Statistics. Sole Advisor: Assist. Prof. Ceylan Talu-Yozgatlıgil. 2010.

 

PhD Theses

 

Continuing

Yazıcı, C., A Computational Approach to Detect Inhomogeneities in Time Series Data. METU, Department of Statistics. Sole Advisor: Prof. Dr. İ. Batmaz. 2012-ongoing.

 

Aslan, S. Temporal Clustering of Multivariate Time Series. METU, Department of Statistics. Principal Advisor: Assist. Prof. Ceylan Talu-Yozgatlıgil. Co-Advisor: Assoc. Prof. Dr. Cem İyigün. 2012-ongoing.

 

NINLIL PROJECTS

 

Homogeneity Analysis of Meteorological Data by the Methods of Computational Statistics. METU Scientific Research Project (BAP) Fund, No: BAP-01-09-2015-001. Ankara, Turkey. 2015-ongoing.

 

Developing Precipitation Models by Hidden Markov Models: A Case of Turkey. METU Scientific Research Project (BAP) Fund, No: BAP-01-09-2014-001. Ankara, Turkey. 2014-ongoing.

 

Redefining Climate Regions of Turkey and Developing Precipitation Models Using Data Mining Techniques. METU Scientific Research Project (BAP) Fund, No: BAP-2008-01-09-02. Ankara, Turkey. 2008-2011. http://www.stat.metu.edu.tr/research-projects/ninlil/