Participated International Conferences & Congresses
(with the work done at MARPOS)

“Ultrafast charge carrier dynamics of CuBi2O4 photocathodes for solar hydrogen evolution reaction”, E. Ardalı, H. Jahangiri, N. Solati, U. Yahsi, C. Tav, A. Sennaroğlu, S. Kaya, The 15th Femtochemistry Conference, July 30 - August 4, 2023, Berlin, Germany. (https://femto15.mbi-berlin.de/conference)

“A Novel Approach Enabling Atomic Scale Characterization for Li-on Battery Components probed by Positron Annihilation Lifetime Spectroscopy (PALS)”, Recep Bakar, Süleyman Koç, Ayşe Yumak Yahşi and Uğur Yahşi, mESC-IS & INESS Joint Event: 7th Int. Symp on Materials for Energy Storage and Conversion & 11th Int. Conference on Nanomaterials and Advanced Energy Storage Systems, Akyaka, Muğla, 17-21 July 2023. (https://mesc-is.org/)

"Positron Spectroscopy Techniques at Marmara University: Defect (Free Volume) Characterization of Materials as Technological Applications", Uğur Yahşi, 3rd International Conference on Radiations and Applications, CRNA-Algiers (Jointly Organized by ALGERIA (Nuclear Research Centre of Algiers (CRNA), Atomic Energy Commission(COMENA), ALGERIA), 21–23 November 2022. https://icraa.net/ 

“Ionic Conductivity of PVdF-co-HFP with Li-salts In Terms of Free Volume Probed by Positron Annihilation Lifetime Spectroscopy”, U. Yahşi, C. Tav, G. Erdemci, B. Çoşkun, H. Deligöz, S. Yilmaztürk, M. Yilmazoğlu, K Ulutaş, D. Değer, Ş. Yakut, International VII. Polymer Science and Technology Congress (Polymer 2018), 9-12 Eylül 2018, Osmangazi University, Eskişehir.

“Temperature and Pressure Dependent Relaxation of Polymers In Terms of Free Volume Fraction”, U. Yahşi, B. Çoşkun, A. Yumak Yahşi, C. Tav, International VII. Polymer Science and Technology Congress (Polymer 2018), 9-12 September 2018, Osmangazi University, Eskişehir.

“DC Conductivity, Thermal and Free Volume Properties of Thermoplastic polyurethane/boron nitride compounds”, M. Y. Yener, E. Baştürk, S. Madakbaş, M. V.  Kahraman, F. Dumludağ, M. S. Umer, U. Yahşi, C. Tav, International VII. Polymer Science and Technology Congress (Polymer 2018), 9-12 September 2018, Osmangazi University, Eskişehir.

“Correlation Between Free Volume Holes And Mechanical Properties of Side Chain LCP-HDPE Graft Products”, B. O. Sena, U. Yahsi, S. Cetin, C. Tav, M. Yavuz Yener, U. Soykan, 2nd International Conference on Applications in Chemistry and Chemical Engineering (ICACChE), 10-14 October 2018 Belgrade, Serbia.

“Some Studies Related to the Determination of Factors Affecting Positronium Formation of High Density Polyethylene (HDPE) Via Positron Annihilation Lifetime Spectroscopy (PALS)”, B. O. Sena, U. Yahsi, C. Tav, 2nd International Conference on Applications in Chemistry and Chemical Engineering (ICACChE), 10-14 October 2018 Belgrade, Serbia.

“Free Volume Properties of Side Chain LCP-HDPE Graft Coproducts Probed by Positron Annihilation Lifetime Spectroscopy”, B. Ö. Sen, U. Yahsi, C. Tav, S. Cetin, M.Y. Yener, U. Soykan, The International Joint Science Congress of Materials and Polymers (ISCMP), 25-28 August 2017 in Ohrid, Macedonia (poster).

“Investigation of a relationship between Free Volume and Ionic Conductivity of PVdF-co-HFP with Ionic Liquid”, U. Yahşi, C. Tav, G. Erdemci, B. Çoşkun, H. Deligöz, S. Yılmaztürk, M. Yılmazoğlu, K. Ulutaş, D. Değer, Ş. Yakut, The International Joint Science Congress of Materials and Polymers (ISCMP), 25-28 August 2017 in Ohrid, Macedonia.

“The Surface Gradient Profile of Free Volume of PS, PMMA, and SAN using Simha-Somcynsky and Cahn-Hilliard Theories”, A. Yumak, S. Küzeci, C. Tav and U. Yahsi, The International Joint Science Congress of Materials and Polymers (ISCMP), 25-28 August 2017 in Ohrid, Macedonia (poster).

“Analysis of Positron Lifetime Spectra Using Bayesian Inference”, D. Ustundag, M. Cevri, U. Yahşi, ISP 2015 - The 2nd IET International Conference on Intelligent Signal Processing 2015, 1-2 December 2015, Kensington Close Hotel, London, UK.

"Bayesian Analysis Of Positron Annihilation Lifetime Spectra", D. Ustundag, M. Cevri, U. Yahşi,  International Statistic Days 2014, Antalya, 10-14 May 2014, pp.73-73

“Free Volume Effects on the Ionic Conductivity of PVdF-co-HFP with Li-salt Complexes Probing by Positron Annihilation Techniques,” U. Yahşi, C.Tav, G.Erdemci, B.Coşkun, K.Ulutaş, S.Yılmaztürk, M.Yılmazoğlu ve H.Deligöz, Turkish Physical Society 28th International Physics Congress, 6-9 September 2011, Bodrum.

“The Correlation Between Conductivity And Free Volume In Polymer Electrolytes Probing Positron Annihilation Lifetime Spectroscopy,” G. Erdemci, B. Çoşkun, S. Yılmaztürk, M. Yılmazoglu, H. Deligöz, C. Tav, U. Yahsi ve K. Ulutas, Turkish Physical Society 26th International Physics Congress, 24-27 Eylül 2009, Bodrum, Türkiye.

“On The Relaxation Time Of Polymers In Terms Of Temperature And Pressure Dependent Hole Fraction,” B. Çoşkun, U. Yahşi ve C. Tav, Turkish Physical Society 26th International Physics Congress, 24-27 Eylül 2009, Bodrum, Türkiye.

“A study on the Investigation of a Relationship Between Free Volume and Ionic Conductivity of Polymer-Salt Electrolytes,” S. Yılmaztürk, M. Yılmazoğlu, G. Erdemci, B. Çoşkun, H. Deligöz, C. Tav, K. Ulutaş, U. Yahşi, 8th International Conference on Advanced Polymers via Macromolecular Engineering (APME), Dresden, German, Oct. 4 to 7, 2009.

 

Participated National Conferences & Congresses
(with the work done at MARPOS)

"Pozitron Yokolma Spektroskopi Teknikleri: Teknolojik Uygulama Olarak Malzemelerin Yapısal Boşluk İncelenmesi", U. Yahşi, Istanbul Condensed Matter Physics Meeting, İstanbul Üniversitesi, 26-28 September 2022. https://ymf.istanbul.edu.tr/tr/_  

“On the Ionic Conductivity of PVdF-co-HFP with Li-salt Complexes: Free Volume effects Probing Positron Annihilation Lifetime Spectroscopy,” G. Erdemci, B. Çoşkun, S. Yılmaztürk, M. Yılmazoglu, H. Deligöz, C. Tav, U. Yahsi and K. Ulutas, 16. Statistical Physics Days, 25-27 June 2009, Koç University, Sarıyer, İstanbul.

“Lityum Tuzu İçeren Katı Polimer Elektrolitlerin Hazırlanması ve İyonik İletkenliklerinin Gözenek Hacmi ile İlişkilendirilmesi,” S. Yılmaztürk, H. Deligöz, C. Tav, U. Yahsi ve K. Ulutas, UKMK-8, 26-29 August 2008, İnönü University, Kongre ve Kültür Merkezi, Malatya

“Temperature Dependence of Free Volume in Polyurethane Using Positron Annihilation Lifetime Spectroscopy,” U. Yahsi ve C. Tav, 12. Statistical Physics Days, 30 June-02 July 2005, İstanbul Technical University, Maslak, İstanbul