• Proceedings of the Korean Society of Precision Engineering Conference
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• 2008.06a
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• pp.879-880
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• 2008

• Journal of the Korean Society of Safety
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• v.30 no.6
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• pp.110-116
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• 2015

A 3D camera-based on-site work-related musculoskeletal disorder risk assessment(WMDs) tool has been developed. The device consists of Kinect a 3D camera manufactured by Microsoft, a servo-motor, and a mobile robot. To complement inherent narrow field of view(FOV) of Kinect, Kinect is rotated according to PID servo-control algorithm by a servo-motor attached underneath, to track movement of a subject, producing skeleton-based motion data. With servo-control, full 360 degrees tracking of a test subject is possible by single Kinect. It was found from experimental tests that the proposed device can be successfully employed for on-site WMDs risk assessing tool.

• Journal of Internet Computing and Services
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• v.10 no.5
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• pp.165-181
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• 2009

This paper presents an effective representation scheme for the shape analysis of the hippocampal structure and a stereoscopic-haptic environment to enhance sense of realism. The parametric model and the 3D skeleton represent various types of hippocampal shapes and they are stored in the Octree data structure. So they can be used for the interactive shape analysis. And the 3D skeleton-based pose normalization allows us to align a position and an orientation of the 3D hippocampal models constructed from multimodal medical imaging data. We also have trained Support Vector Machine (SVM) for classifying between the normal controls and epileptic patients. Results suggest that the presented representation scheme provides various level of shape representation and the SVM can be a useful classifier in analyzing the shape differences between two groups. A stereoscopic-haptic virtual environment combining an auto-stereoscopic display with a force-feedback (or haptic) device takes an advantage of 3D applications for medicine because it improves space and depth perception.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.6
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• pp.2935-2944
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• 2013

The study aims to evaluate job stress, self-efficacy, depression and health-related quality of life according to musculoskeletal symptoms of the ordinary white-collar worker. The subjects of the study were 83 workers who were working D Health Center and Dgu office of Gwangju Metropolitan City and they were voluntarily interviewed with a use of organized questionnaire. Except the responses from three subjects whose responses were insincere of 102 ones were decided for the final analysis. The results showed that there were significant differences in all job stress, self-efficacy, depression and health-related quality of life according to musculoskeletal symptoms. Depression, self-efficacy, job stress were significantly correlated; however, health related to quality of life was not. Therefore, as the results indicate that job stress, self-efficacy, depression and health-related quality of life can be affected by musculoskeletal pain for office workers, there is a need for the development of programs focused on the prevention of musculoskeletal discomfort.

• Applied Chemistry for Engineering
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• v.10 no.2
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• pp.275-280
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• 1999

Cellulose has three hydroxyl groups with different reactivity. By substitution reaction, trimethylsiloxyl-, vinyldimethylsiloxyl-, allyldimethylsiloxyl-, phenyldimethylsiloxyl-, 3,3,3-trifluoropropyldimethylsiloxyl- and tris(trimethylsiloxy)siloxylcellulose were synthesized IR, NMR, and elemental analysis were used for confirming their structures, degree of substitution (D.S.) and the reactivity of siloxylation agent, respectively. The D.S. values were 2.5, 2.2, 2.1, 2.2, 2.6, 0.7 for the corresponding siloxylcellulose.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.621-624
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• 2004

본 논문에서는 위피(WIPI, Wireless Internet Platform for Interoperability) 플랫폼 상에서 운용되는 2D/3D 컨텐츠 제작을 위한 저작도구를 설계하며, 2D 및 3D API를 사용하는 응용 프로그램 작성을 직접 지원한다. 사용자는 드래그와 드롭(Drag & Drop), 스프라이트 깜빡임(Sprite Blitting), 스프라이트 회전(Sprite Rotation), API 추가/삭제 기능, 코드 배포 등의 기능을 이용하여 Jlet의 기본 골격을 저작도구의 버튼 하나로 손쉽게 작성할 수 있게 된다. API 추가/삭제 기능을 이용하여 기존 작업을 손쉽게 재사용하거나, 작성 결과물을 코드 배포 기능을 이용하여 하나의 jar 파일로 간단히 작성할 수 있게 된다. 스프라이트 및 2D/3D 관련 기능은 게임 등의 컨텐츠의 코드 작성 시 효율성을 크게 증가 시킨다. 본 논문에서는 이러한 기능을 가진 위피용 컨텐츠 저작도구를 설계하며 제안하였다.

• The korean journal of orthodontics
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• v.27 no.3 s.62
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• pp.421-430
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• 1997

Alveolar bone grows with development of tooth germs and roots; bone deposition occurs with tooth eruption. Bone components undergoes processes of resorption and deposition, and when the balance between them is disrupted, decrease in alveolar bone height or excessive bone deposition result. It has been hon that repositioning of teeth through orthodontic treatment can cause alveolar bone resorption which result in decreased alveolar bone height, and there have been many studies to evaluate such effects. X-ray films that could be replicated and standardized were chosen in clinical studies, and among them, bitewing films were used for objective evaluation of changes in alveolar bone level. Twenty subjects, 10 to 13-year- old (average 12.2) children with Cl I molar key, healthy oral condition, no congenital missing, no periodontal disease, and pre-and post-orthodontic bitewing films, were randomly selected for comparison of alveolar bone heights. Amounts of tooth and changes in alveolar bone heights were analyzed. The following results were obtained: 1. Amount of tooth movement in canine, premolar, and molar regions, changes in tooth axis, and changes in alveolar bone heights were measured, and the mean and median values were obtained. 2. When pre-and post-orthodontic alveolar bone levels were compared, larger changes were noticed in maxilla than mandible. 3. When mesio-distally compared, larger changes were observed in the distal sides of 3D3 and 4M3, mesial sides of 4M3 and 4D3, distal sides of 4D3 and 5M3, mesial sides of 5M3 and 5D3, md distal sides of 5D3 and 6M3. 4. When the amounts of tooth movements(TX, TY)and changes in tooth axis(A) were compared,34TX, 34TY, 34A of both sides in maxilla were greater, iud changes in alveolar bone level were greater than any other region.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2004.04a
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• pp.197-202
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• 2004

As a part of environmental pollution prevention and resources recycling, the regeneration of waste tire has been largely contributed to national industry. But, the worker has been evaded this regeneration process by reason of the best mischievous process condition among 3D industries. So, the first, the process condition of regenerating waste tire was analyzed. The second, the equipment or system was developed for the improvement of working strength and environment. The last, researchers intend to solve these problems

• Journal of the Korean Society for Precision Engineering
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• v.25 no.9
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• pp.126-134
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• 2008

Kendo is one of the popular sports in modem life. Head, wrist and thrust attack are the fast skill to get a score on a match. Human muscle skeletal model was developed for biomechanical study. The human model was consists with 19 bone-skeleton and 122 muscles. Muscle number of upper limb, trunk and lower limb part are 28, 60, 34 respectively. Bone was modeled with 3D beam element and muscle was modeled with spar element. For upper limb muscle modelling, rectus abdominis, trapezius, deltoideus, biceps brachii, triceps brachii muscle and other main muscles were considered. Lower limb muscle was modeled with gastrocenemius, gluteus maximus, gluteus medius and related muscles. The biomechanical stress and strain analysis of human muscle was conducted by proposed human bone-muscle finite element analysis model under head, wrist and thrust attack for kendo training.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2004.10a
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• pp.175-180
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• 2004

As a part of environmental pollution prevention and resources recycling, the regeneration of waste tire has been largely contributed to national industry. But, the worker has been evaded this regeneration process by reason of the best mischievous process condition among 3D industries. So, the first, the process condition of regenerating waste tire was analyzed. The second, the equipment or system was developed for the improvement of working strength and environment. The last, researchers intend to solve these problems