The School of Postgraduate Studies, Department of Mechanical Engineering at Wallaga University, is pleased to announce the successful public defence of two PhD candidates on January 3, 2025. The event, held at Wollega University, marked a remarkable milestone in advancing research and academic excellence. The defence sessions also featured participation from international examiners, adding a global perspective to the rigorous evaluation process.
Highlights of the Event
1. PhD Candidate: Tekalign Lemma Woldasilassie
Program: PhD in Mechanical Engineering (Industrial and Management System Engineering)
Research Title: Direct and Moderating Effects of Additive Manufacturing on Supply Chain Complexity and Performance: A Case of the Footwear Industry in Ethiopia
Main Supervisor: Prof. Hirpa G. Lemu (PhD), University of Stavanger
Co-supervisor: Dr. Endalkachew Mosisa (PhD), Wallaga University
Tekalign presented his groundbreaking research on the transformative impact of additive manufacturing on supply chain complexity in Ethiopia’s footwear industry. His study utilized advanced methodologies like DEMATEL and structural equation modeling to identify critical drivers of supply chain complexity and propose actionable strategies to enhance performance. The presentation sparked dynamic discussions, highlighting its significance for both academic and industrial stakeholders.
2. PhD Candidate: Naol Dessalegn Dejene
Program: PhD in Mechanical Engineering (Manufacturing), Dual Degree: Wallaga University and University of Stavanger, under the INDMET Project
Research Title: Effects of Process Parameters on the Quality of Metal Additive Manufacturing in Laser Powder Bed Fusion-Based Systems: Machine Learning Approach
Main Supervisor: Prof. Hirpa G. Lemu (PhD), University of Stavanger
Co-supervisor: Dr. Endalkachew Mosisa (PhD), Wallaga University
Naol, a dual degree candidate supported under the INDMET Project, delivered a compelling presentation on optimizing process parameters in Laser Powder Bed Fusion (L-PBF) systems using machine learning techniques. His research emphasized advancements in achieving superior material properties through precise parameter optimization. The presence of international examiners and the dual degree collaboration enriched the defence, underscoring the global relevance of his research.
A Global and Collaborative Milestone
The presence of international examiners during the public defence sessions reflected the global nature of Wallaga University’s academic pursuits. The dual degree program between Wallaga University and the University of Stavanger, supported by the INDMET Project, highlights the institution’s commitment to fostering international partnerships and advancing research with real-world applications.
Conclusion
The public defence sessions were well-attended by faculty, students, and researchers, both locally and internationally. Both candidates demonstrated exceptional academic competence and received commendable evaluations from the defence committees.
Wallaga University extends its heartfelt congratulations to Tekalign Lemma Woldasilassie and Naol Dessalegn Dejene for their exemplary achievements. These successes signify the university’s dedication to research and innovation that address global and local challenges.
Acknowledgment
We express our sincere gratitude to the supervisors, Prof. Hirpa G. Lemu (PhD) and Dr. Endalkachew Mosisa (PhD), for their outstanding guidance, as well as the international, national, and internal examiners for their valuable contributions. Special appreciation is also extended to the INDMET Project for its support in fostering international academic collaboration.
