Numerical analysis was performed to analysis the structural characteristics of the head device in the road mower system. The head device connects mower system with the boom of the special vehicle. The system with various road surface conditions is subjected to continuous vibration and repeated load. Especially, the maximum equivalent stress occurs in the pillar of the head device, and the maximum equivalent strain also occurs in the fixed plate that supports the mower system. Fatigue analysis results show that the upper end of the pillar is very vulnerable. This analysis results can be used as basic data for optimal road mower head system design.

Work-related musculoskeletal disorder has been associated with long hours of computer work and prolonged periods of static posture. In clinical settings, postural correction is a common treatment approach for individuals with neck, shoulder, and back pain. This study was designed to identify the effect of Forward Head Posture Correctional Device during computer work. Twelve healthy adults (mean age, 27.4 yrs; mean height, 165.0cm mean weight, 65.8 kg) participated in the study. They had no medical history of neurological or surgical problems with their upper extremity. The subjects were asked to perform Head Forward Posture under the guidance of physical therapists and the measured angles were analyzed using a 3-D motion analysis system. Markers were placed on the C7 spinous process, tragus of the ear and forward head angle was between the line from the tragus to the C7 line and the Y-axis at the C7. The statistical significance of difference between, "without" and "with" correctional device was tested by paired t-test. A level of significance was set at α=.05. In comparison of the computer work between "without" and "with" correctional device, Forward Head Angle was showed significant difference (p<.05). In conclusion, the range of Forward Head Angle was significantly decreased during computer work with the correctional device. Further research is needed to understand the nature of motor control problems in deep muscles in patients with neck, shoulder, and back pain.

오귤러스 리프트와 같은 새로운 HMD기기 출시 이후 가상현실 산업은 다시 세간의 주목을 받고 있으나, 아직 콘텐츠의 다양성은 미비하며, 일부 시각적 몰입만이 극대화된 콘텐츠가 다수 인 상황이다. 물론 이와 같은 일부 콘텐츠로의 편중 현상은 아직 새로운 미디어 기반의 콘텐 츠 개발을 위한 심층적인 연구에 필요한 충분한 시간 및 재원을 충족시키지 못한 것이 그 원인 이라고 할 수 있다. 따라서 본 연구는 VR콘텐츠 산업의 지속적 발전을 위한 콘텐츠의 다양성 확보를 위해 대중에게 가장 거부감이 없으면서, 시각적 몰입 외에도 심리적 몰입 요소를 적용 할 수 있는 게임의 요소 중 이야기구조를 선정하여 ‘VR게임 콘텐츠 기획 방법론’을 제시, 향후 다양한 VR콘텐츠의 기획/제작을 위한 이론적 토대를 마련하였다.