Public Ph.D. Viva-Voce Examination of Mr. Mohammed Nasser Hezam Dahesh
The Public Viva-Voce Examination for the PhD Dissertation entitled, “A Study on the Degradation of Photovoltaic (Solar) Panels under Moderate and Humid Climatic Conditions in the Republic of Yemen”, submitted by Mr. Mohammed Nasser Hezam Dahesh, Department of Physics, Faculty of Science, was held on Wednesday 27/08/1446 Hijri corresponding to 26/02/2025. The Viva-Voce Committee, which was formed based on a resolution issued by the Post-Graduate Studies and Scientific Research Council, consisted of the following:
| # | Committee Members | Designation | University | Position |
| 1 | Prof. Mahmoud Ahmed Al-Daais | Internal Examiner | Sana’a University | Chair |
| 2 | Assoc. Prof. Mohammed Qasim Al-Mutawakkil | Main supervisor | Sana’a University | Member |
| 3 | Assoc. Prof. Mohammed Ali Saif Ahmed | External examiner | Amran University | Member |
The study aimed to investigate the impact of various climatic conditions (moderate and humid) in the Republic of Yemen on the performance degradation of solar panels..
The study reached a number of results; among the key findings was that the decline in the output power of the panels is primarily due to a reduction in short-circuit current, indicating that the panels undergo optical degradation patterns.
The study came out with a number of recommendations, including the possibility of recycling the encapsulation material used in older photovoltaic panel samples (Arco Solar), which could contribute to the production of solar panels with an extended lifespan of up to 40 years.
Academics, researchers, students, interested individuals and the researcher’s colleagues and family members attended the viva.
The dissertation was examined and recommended by the Viva-Voce Committee for acceptance and approval. Then, the Candidate was recommended to be awarded the degree of Doctor of Science majoring in Solar Energy Physics.
