Ugur Yahsi | Experimental methods | Best Researcher Award

Prof. Ugur Yahsi | Experimental methods | Best Researcher Award

Head of the General Physics Department | Marmara University | Turkey

Prof. Dr. Uğur Yahşi is a Full Professor in the Physics Department at Marmara University, Istanbul, Turkey. With an academic background spanning Physics at institutions such as Istanbul University (BSc), University of Wisconsin (MSc), and Case Western Reserve University (PhD), he has made notable contributions to the scientific community in both research and education.

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Early Academic Pursuits 📚

Prof. Dr. Yahşi’s academic journey began with a BSc in Physics from Istanbul University in 1983. He pursued an MSc at the University of Wisconsin from 1987-1988, followed by a PhD at Case Western Reserve University, completing his studies in 1994. His early research laid the foundation for his future work in material science and applied physics.

Professional Endeavors 💼

Prof. Yahşi’s professional career has been extensive, with a continuous academic presence at Marmara University, where he has held positions from Assistant Professor to Full Professor since 1996. Additionally, he has served as a Visiting Scientist at the University of Missouri-Kansas City and contributed significantly to various administrative roles within the university, such as Senator and Director of the Institute of Pure and Applied Sciences.

Contributions and Research Focus 🔬

Prof. Dr. Yahşi’s research is at the forefront of material science, particularly in nanomaterials, macromolecular physics, and defect structures. His research spans across multiple topics, including vacancy structures, dendrimers, polymer-ion interactions, and nanometric defects in materials. He is a leading figure in applying positron annihilation spectroscopy and other advanced techniques to study the electronic properties of materials, advancing nanotechnology and material engineering.

Impact and Influence 🌍

Prof. Yahşi’s impact extends beyond his research, as he has shaped the academic environment at Marmara University. He has mentored numerous students through undergraduate, master’s, and doctoral research projects. His leadership roles have fostered growth in the Physics Department and research programs, contributing to collaborations with other institutions and research organizations globally.

Academic Cites 📑

Prof. Dr. Yahşi has been extensively cited in scientific journals for his work on positron annihilation and material defect structures. His influence can be seen in the academic advancements in polymer science, nanotechnology, and material characterization techniques. The funding from projects such as TÜBİTAK and Marmara University underscores the significance of his work in advancing scientific discovery.

Research Skills 🔧

Prof. Yahşi possesses a diverse set of research skills, including expertise in positron annihilation spectroscopy, experimental physics, and materials characterization. He is skilled in various computational tools such as Fortran, Mathematica, and MatLab, enabling him to model complex physical systems and conduct numerical simulations in support of his theoretical work.

Teaching Experience 🎓

Prof. Yahşi’s teaching spans over decades, with experience in courses ranging from Advanced Classical Mechanics to Computer Programming in Fortran. His commitment to student development is evident through his role in shaping curriculum and teaching courses in Technical English, Solid-State Physics, and Numerical Methods. He has also contributed significantly to the translation and localization of key texts in Physics, ensuring that students have access to high-quality educational resources.

Awards and Honors 🏆

Prof. Yahşi has been the recipient of numerous fellowships and awards, such as the Turkish Educational Ministry Fellowship for his graduate studies. His work has earned research grants from prominent Turkish organizations like TÜBİTAK, demonstrating his recognized contributions to scientific progress. He continues to receive support for innovative projects, including the BİDEB Mentorship Support Program and various Marmara University projects.

Legacy and Future Contributions 🌱

Prof. Dr. Uğur Yahşi’s legacy lies in his commitment to advancing physics education and research, particularly in material science and nanotechnology. His ongoing projects, such as the investigation of flash sintering in doped ZnO structures and polymer materials, are paving the way for future breakthroughs. With continued administrative roles and research leadership, Prof. Yahşi is poised to make lasting contributions to both academic knowledge and scientific innovation.

Publications Top Notes

Free volume impact on ionic conductivity of PVdF/GO/PVP solid polymer electrolytes via positron annihilation approach

  • Authors: M. Yilmazoğlu, H. Okkay, U. Abacı, C. Tav, U. Yahşi
    Journal: Radiation Physics and Chemistry, 2025

The Influence of Defects on the Structural, Optical, and Antibacterial Properties of Cr/Cu Co-Doped ZnO Nanoparticles

  • Authors: L. Arda, Z. Ra’ad, S. Veziroğlu, C. Tav, U. Yahşi
    Journal: Journal of Molecular Structure, 2025

Correlation of proton conductivity and free volume in sulfonated polyether ether ketone electrolytes: A positron annihilation lifetime spectroscopy study

  • Authors: M. Lahmuni, M. Yilmazoğlu, U. Abacı, C. Tav, U. Yahşi
    Journal: Radiation Physics and Chemistry, 2025

A novel approach for the atomic scale characterization of Li-ion battery components probed by positron annihilation lifetime spectroscopy

  • Authors: R. Bakar, S. Koç, A. Yumak Yahşi, C. Tav, U. Yahşi
    Journal: Materials Research Bulletin, 2024

Free-volume analysis of the structural and dielectric properties of PMMA/TeO2 composites via positron annihilation lifetime spectroscopy

  • Authors: S. Kuzeci, E. Özcan, A.U. Kaya, R. Bakar, C. Tav, U. Yahşi, K. Esmer
    Journal: Journal of Alloys and Compounds, 2024

 

Christian Kenfack Sadem | Condensed Matter Physics | Member

Assoc Prof Dr. Christian Kenfack Sadem | Condensed Matter Physics | Member

PHD at University of Abomey Calavi, Benin

Christian Kenfack Sadem, an Associate Professor born on July 26, 1983, in Buea, Cameroon, holds Ph.D.s in Physical Oceanography and Condensed Matter Physics. With a diverse teaching background, including roles as a lecturer and visiting lecturer across Cameroon, he currently serves as an Associate Professor at the University of Dschang. Kenfack’s expertise spans research, teaching, and supervision of junior researchers, focusing on condensed matter physics and exciton-polaron dynamics. Recognized for his teaching excellence, he inspires students to pursue research careers. Kenfack is also skilled in data management and scientific software, contributing significantly to climate modeling.

Professional Profiles:

Education

Ph.D. in Physical Oceanography and Applications, University of Abomey Calavi, Benin, May 2021 Ph.D. in Condensed Matter Physics, University of Dschang, Cameroon, November 2011 Masters in Physical Oceanography and Applications, University of Abomey Calavi, Benin, November 2010 M.Sc. in Condensed Matter Physics, University of Dschang, Cameroon, June 2008 B.Sc. in General Physics, University of Ngaoundere, Cameroon, September 2005

Employment History

Associate Professor: University of Dschang, Cameroon (2019 – Present) Lecturer and Visiting Lecturer: Various institutions in Cameroon (2012 – 2019) Visiting Lecturer: National Polytechnic Bambui, Cameroon (2008 – 2009) Visiting Lecturer: Intitut Privé Polyvalent la Reforme, Cameroon (2007 – 2008)

Teaching Activities

Taught a range of courses including Statistical Physics, Group Theory, General Physics, Electromagnetism, and more

Prizes, Awards, Fellowships

Received various scholarships and fellowships including the Mwalimu Nyerere African Union Scholarship and the DAAD fellowship. Conducted groundbreaking research in the field of condensed matter physics, particularly in the areas of exciton-polaron dynamics and optical properties of transition metal dichalcogenides

Research Focus:

Christian Kenfack Sadem has contributed significantly to various scientific publications, including “Mobility and Decoherence of Bipolaron in Transition Metal Dichalcogenides Pseudodot Quantum Qubit” published in the Iranian Journal of Science. Additionally, he has co-authored articles such as “Enhancement of the group delay in quadratic coupling optomechanical systems subjected to an external force” in Chinese Physics B and “First principle investigation of electronic and optical properties of graphene/h-BN bilayers using Tran-Blaha-modified Becke-Johnson potential” in Optical and Quantum Electronics. His research covers a wide range of topics, including exciton-polaron dynamics, optical properties of graphene, and magnetic barrier effects on transition metal dichalcogenides.

Publications 

  1. Deformation and size effects on electronic properties of toroidal quantum dot in the presence of an off-center donor atom, cited by: 5, Publication date: 2022.
  2. The intensity and direction of the electric field effects on off-center shallow-donor impurity binding energy in wedge-shaped cylindrical quantum dots, cited by: 18, Publication date: 2022.
  3. Magnetic barrier and temperature effects on optical and dynamic properties of exciton-polaron in monolayers transition metal dichalcogenidescited by: 1, Publication date: 2022.
  4. Impacts of an initial axial force and surface effects on the dynamic characteristics of a bioliquid-filled microtubule in cytosol, Publication date: 2022.
  5. A Ginzburg-Landau approach to field theories for single, isolated zero-dimensional superconductors, Publication date: 2022.
  6. Magnetic barrier and electric field effects on exciton-polaron relaxation and transport properties in transition metal dichalcogenide monolayers, Publication date: 2023.
  7. First principle investigation of electronic and optical properties of graphene/h-BN bilayers using Tran-Blaha-modified Becke-Johnson potential, Publication date: 2023.
  8. Enhancement of the group delay in quadratic coupling optomechanical systems subjected to an external force, Publication date: 2023.
  9. Mobility and Decoherence of Bipolaron in Transition Metal Dichalcogenides Pseudodot Quantum QubitPublication date: 2024.

 

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