• 대한물리의학회지
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• 제4권4호
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• pp.257-267
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• 2009

Purpose：The purpose of this study is to examine the effectiveness of ultrasound and myofascial release in patients who have opening mouth limitation and temporomandibular disorder. Methods：Twenty students were randomly assigned to a myofascial release group(n=10) or an ultrasound group(n=7). Each group was treated for 15 minutes per a every treatment session for four weeks. Cervial range of motion(CROM) was used to measure cervical R.O.M., and a mm(millimeter) graduated ruler was used to measure opening mouth limitation. Results：Results of the follows : 1. The neck extension of range of motion of both groups was significantly increased in length of time (p<.05). 2. The neck flexion of range of motion of both groups was significantly increased (p<.05). 3. The quantity of opening mouth of temporomandibular joint of both groups was significantly increased (p<.05). Conclusion：These data suggest that myofascial release and ultrasound are beneficial to increasing a functional recovery of neck(flexion and extension) and opening mouth.

• Clinics in Shoulder and Elbow
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• 제12권1호
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• pp.67-75
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• 2009

목적: 동통과 골성 운동 제한이 동반된 주관절에 대해 후내측 도달법을 이용한 변연 절제 관절 성형술의 임상적 결과를 분석하였다. 대상 및 방법: 2005년 3월부터 2008년 3월까지 주관절의 동통과 골성 운동 제한으로 후내측 도달법을 통한 변연 절제 관절 성형술을 시행 받은 16명을 대상으로 하였다. 추시 관찰 기간은 평균 27.6(13~52)개월이였다. 통증에 대해서 Visual Analogue Scale, 술 전과 술 후 굴곡, 신전, 운동범위를 측정하고 기능에 대해서 Mayo Elbow Performance Score (MEPS)를 측정하여 분석, 평가 하였다. 결과: 최종 추시 시 VAS (visual analogue scale )는 술 전 평균 4.5에서 술 후 평균 1.1으로 통계학적으로 유의한 감소(p<0.001 )를 보였다. 관절 운동 범위는 술 전 평균 $61.6^{\circ}$(0~90)에서 술 후 $109.4^{\circ}$(80~120)로 통계학적으로 유의하게 증가하였다(p<0.001). MEPS 역시 술 전 59.4에서 술 후에는 85.6으로 증가하였다(p<0.001). 술 후 혈종이나 주관절 불안정증 같은 합병증은 없었다. 결론: 후내측 도달법을 이용한 변연 절제 관절 성형술은 쉽게 척골 신경에 대한 조작이 가능하고 주관절 내측 측부 인대의 손상을 최소화 할 수 있으며 주관절 전 구획(all compartment)에 광범위한 변연 절제가 가능하여 동통과 골성 관절 운동 제한이 동반된 주관절에서 동통의 감소와 관절 운동 범위의 회복에 도움이 되는 유용한 술식으로 사료된다.

• Journal of Oral Medicine and Pain
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• 제15권1호
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• pp.61-68
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• 1991

The author studied the changes of subjective, objective symptoms and muscle activities with EM2 (myo-tronics Co., Seattle, USA) before and after MRA therapy. The 11 patients were treated with MRA and active range of motion, pain and mouth opening limitation were checked at each visit for 6-8 weeks. Electromyographic activities were measured in both anterior lobe of temporalis and middle fibers of masseter at the position in rest, clenching and mastication. The obtained results were as follows : 1. There were significant decrease in pain and mouth opening limitation and significant increase in active range of motion after MRA therapy. 2. The muscle activities tended to decrease in general, especially in the temporal and masseter muscles on clenching and in the masseter on mastication after MRA therapy. 3. There were no significant differences in muscle activities between affected and unaffected side, but there was significant differences in temporal muscle on clenching side after therapy. 4. There were no significant differences in active range of motion, pain and mouth opening limitation between acute and chronic groups. 5. There was more significant decrease in muscle activities of the affected side in acute group than those in chronic group.

• International Journal of Advanced Culture Technology
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• 제12권2호
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• pp.345-352
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• 2024

We are designed to solve cyber motion sickness, an important task that must be addressed for the growth of the virtual reality content industry. Not only the industry but also academia are paying a lot of attention. However, despite long interest and research on the phenomenon of cyber motion sickness, a solution has not been drawn. This is deeply related to the lack of tools that can effectively measure cyber motion sickness. Therefore, in this paper, prior studies on cyber motion sickness were analyzed to develop a tool that can effectively measure cyber motion sickness when users experience immersive virtual reality. The measurement method of cyber motion sickness used in previous studies, each characteristic and limitation, and common factors related to cyber motion sickness were analyzed. Each of the related factors was derived as sub-factors. Based on the analyzed contents, an effective cyber motion sickness measurement evaluation tool model in immersive virtual reality was presented. It is expected that the evaluation tool model can be used for the study of cyber motion sickness.

• 한국통신학회논문지
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• 제25권10B호
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• pp.1803-1812
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• 2000

A new motion compensation method for ISAR is presented in this paper. It employs amplitude limiting and integration of consecutive range profiles to improve the range and phase alignment accuracy and to alter the propagation properties of compensation errors. These allow the image quality to be significantly improved. It is shown from the imaging results that the new motion compensation algorithm can get images of targets in field situations with much better quality than the traditional cross-correlation algorithm.

• 대한인간공학회지
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• 제9권1호
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• pp.21-27
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• 1990

Teaching Expert System/World Coordinate System(TES/WDS) was proposed to improve robot motion control. First, precise coordinate reading for getting the inherent data about position and posture of task objects was performed throgh the integrated image and fuzzy processing. Second, singularity and parameter limitation problems in getting the motion data about position and posture of robot in macro motion were solved by proposed geometric algorithm. Third, the unnecessary robot motion was also removed by the Robot Time and Motion (RTM) method and the Multi-Geometric Straight-Line Motion (MGSLM) method in micro motion. This results demonstrated reduction of the average teaching task time according to task order.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 G
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• pp.2237-2239
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• 1998

A limitation is assumed that In this paper, a generalized method is proposed to extract a period of a motion of on object. To detect a periodic motion, we put restrictions on a stationary camera and on a motion of an object. We ca derive the necessary and sufficient condition that an image sequence consists of the projection of the periodic motion by the affine transformation that is a reasonally good approach to the perspective projection. The difficulty of detecting its periodic motion is to select its have period in sequence and to define its width.

• 대한인간공학회지
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• 제9권2호
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• pp.21-28
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• 1990

The robot motion control in the industrial robot is generally executed by the teach pendant. But, it requires much teaching time and workload to the operators. This study suggests the use of the robot motion control method by the computed keyboard in the industrial robot instead of the teach pendant. TES/CCS(Teaching Expert System/Cartesian Coordinate System) and TES/WCS(Teaching Expert System/World Coordinate System) that have been proposed to improve the robot motion control are applied for this concept. This study is intended to improve the robot motion control in TES/CCS. Parameter limitation problems in getting the motion data on position and posture of the robot in macro motion control are solved by proposed geometric algorithm. This result demonstrates reduction of the average teaching task time to the teaching position.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.147.5-147
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• 2001

This paper describes a gait algorithm and a velocity limitation method for a Leg-Wheel Robot. The gait algorithm enables the robot to preserve continuous locomotion even if the velocity command varies extensively. The velocity limitation method restricts the commanded velocity when it exceeds the mechanical limitation of the robot. Combined use of the velocity limitation method with the gait algorithm ensures the continuity of locomotion, and makes the gait pattern efficient with a long step length and low frequency of leg phase change. These methods can be applied to locomotion on unexplored rough terrain even if the range of roughness is unknown.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 1995년도 학술대회
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• pp.137-141
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• 1995

MASF is a kind of temporal filter proposed for noise reduction and temporal band limitation. MASF uses motion vectors to extract temporal information in spatial domain. Therefore, inaccurate motion information causes some distortions in MASF operation. Currently, bilinear interpolation after MBA(Block Matching Algorithm) is used for the motion estimation sheme of MASF. But, this method results in unreliable estimation when the object in image sequence has larger movement than the maximum displacement assumed in BMA or the input images are severely corrupted with noise. In order to solve this problem, we propose a hierarchical motion estimation algorithm for MASF. Experimental results show that the proposed method produces reliable output under large motion and noisy situations.