• Funded by the Ministry of National Defense of Korea, we undertook a project to improve the Korean military rucksack (load-carriage system) supplied to the Korean army and special forces. Since Korea shows a special military operation environment, i.e., many mountainous terrains, an advanced military rucksack that is customized to these operational characteristics as well as the updated average body size of soldiers. Focused on the fact that the existing rucksacks generate a large relative yaw motion between the rucksack and its user, we designed a new rucksack that follows all the military constraints applied to the previous ones.

• This work involves four main research subsections as below:

1) Mechanical analysis and design: we proposed the optimal structure of the rucksack to reduce the relative yaw motion while maintaining its original performance.

2) Biomechanical/kinematic analysis and human experiments (co-work with Prof. Jooen Ahn): designed and conducted the experiments to evaluate the rucksack.

3) Ergonomics, in the perspective of apparel study (co-work with Prof. Yunja Nam): proposed a detailed design of the rucksack.

4) Ergonomics, in the perspective of industrial study (co-work with Prof. Myung Hwan Yun): defined the concept of "combat load" and worked on the cognitive experiment.

• Especially, I managed the overall project, i.e., orchestrating the other research segments. I also gave the undertaking/final reports.