On the morning of July 4, 2026, at Meeting Room P209 of the National Research Institute of Mechanical Engineering, the Institute held the Institute-level doctoral thesis defense ceremony for PhD candidate Mai Tất Lợi, currently a lecturer at Vinh University of Technical Education:

• Thesis topic: Research on external cylindrical surface machining using electrical discharge machining with ultrasonic vibration assistance using graphite electrode
• Training discipline: Mechanical Engineering - Code: 9520103
• Supervisors: Prof. Dr. Vũ Ngọc Pi and Assoc. Prof. Dr. Lê Thu Quý
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The doctoral thesis evaluation committee consisted of 7 members: Committee Chairperson: Assoc. Prof. Dr. Nguyễn Chỉ Sáng (National Research Institute of Mechanical Engineering); Committee Secretary: Assoc. Prof. Dr. Đào Duy Trung (National Research Institute of Mechanical Engineering); 3 reviewers: Assoc. Prof. Dr. Nguyễn Hữu Phấn (Hanoi University of Industry), Assoc. Prof. Dr. Bùi Ngọc Tuyên (Hanoi University of Science and Technology), Assoc. Prof. Dr. Hoàng Văn Gợt (National Research Institute of Mechanical Engineering); 2 members: Assoc. Prof. Dr. Nguyễn Hữu Quang (University of Economics - Technical Industries) and Assoc. Prof. Dr. Trần Ngọc Hiền (University of Transport and Communications).

Attending the thesis defense ceremony, on behalf of the National Research Institute of Mechanical Engineering, was Assoc. Prof. Dr. Lê Thu Quý - Director of the Training Center; representing the candidate's working institution, Vinh University of Technical Education, were Dr. Thái Anh Tuấn, Rector of the university, Dr. Phạm Minh Tâm, Deputy Dean in charge of the Faculty of Mechanical Engineering. Guests also included many educators, scientists from within and outside the Institute, as well as colleagues, family, and friends of the candidate.

Results of the committee's evaluation: the quality and format of the thesis fully met the requirements for a doctoral thesis in Mechanical Engineering as stipulated by the Ministry of Education & Training and the National Research Institute of Mechanical Engineering, with 100% of committee members in agreement, including 1/7 votes for excellence. The results of the thesis have been published in 2 Scopus Q2 indexed articles, 2 Scopus Q4 articles, and 2 domestic journal articles.

The Institute-level doctoral thesis defense ceremony for PhD candidate Mai Tất Lợi concluded successfully.

Some images from the thesis defense ceremony