• Journal of the Ergonomics Society of Korea
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• v.15 no.2
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• pp.125-135
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• 1996

The purpose of this research is to measure range of virtual hip joint and lower limb joints motion such as the hip, knee and ankle joints for 47 young male students. The results of ANOVA revealed that anthropometric dimensions including weight and stature did not show any significant effects on the range of virtual hip joint and lower limb joints motion and the range of motion with two degrees of freedom at the shoulder, virtual hip and hip joints. Anthropometric dimensions such as age, weight, statuire, arm length, shoulder height and leg length were found to be lowly correlated with the range of virtual hip joint and lower limb joints motion. It is expected that the data on the range of joint motion suggested in this study can be used as a valuable input data when designing workplace, predicting human posture and reach volume, etc.

• Journal of Biomedical Engineering Research
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• v.14 no.2
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• pp.113-123
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• 1993

The aim of this study is to design a electrogoniometer for the measurement of three dimensional human elbow joint rotations. Using this device and visual monitor, we measured the angle of elbow joint rotations during the goal-directed movements. And we extracted myoelectric signals(MES) to verify the inter-relationship of elbow joint activities and constructed a system for the analysis of the spectrum for MES. The data obtained from this system will be used for the controller signal of prosthetic arm.

• Journal of TMJ Balancing Medicine
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• v.11 no.1
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• pp.25-36
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• 2021

It was observed that the effectiveness of Yin-yang balancing therapy of the tempromandibular joint (YBT) or functional cerebrospinal therapy (FCS) in three cases: an acute and a chronic motor tic disorder and a Tourrette's disorder (TD). These three cases were mainly managed with cervical balancing appliance for the Yin-yang Balancing on tempromandibular joint (TMJ) and pelvic balance therapy. They were treated concurrently with acupuncture, cupping and herb-medicine. Clinical outcome measurement was based on subjective measures with visual analogue scale (VAS), Yale Global Tic Severity Scale (YGTTS) and clinical observations for 235, 279 and 273 days respectively. The patient showed positive changes after the treatment and this effect maintained over the follow-up period. Although it is not clear whether the effect is sustained afterwards or not, a positive effect on the motor tic disorders and TD was observed. And so, furthermore strict clinical and structural researches for verification on YBT is expected.

• Physical Therapy Rehabilitation Science
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• v.8 no.4
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• pp.202-209
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• 2019

Objective: The purpose of this study was to evaluate the effects of temporomandibular joint and cervical vertebra treatment in persons with tension-type headaches on pain, tenderness, and functional improvement. Design: Three-group pretest-posttest design. Methods: Subjects with tension-type headaches were divided into the temporomandibular joint and cervical vertebra treatment group (n=11), temporomandibular joint treatment group (n=11), and cervical vertebra treatment group (n=11), and pre- and post-evaluation was performed. The temporomandibular joint treatment group underwent compression massage and joint ply of the muscles around the temporomandibular joint. The cervical vertebra group received deep tendon massage and Myofascial Release of the cervical muscles. The temporomandibular joint and cervical vertebra treatment group performed both types of treatment. Treatment was performed for 50 minutes, three times a week for 4 weeks. Measurement tools included the Korean version of the short form-McGill Pain Questionnaire (SF-MPQ, K), Headache Impact test-6 (HIT-6), Neck Disability Index (NDI), and the Digital Algometer FPX25. Results: The groups showed significant differences in SF-MPQ, HIT-6 test, NDI, and Alogometer FPX25 test scores before and after intervention (p<0.05). The differences between the groups were most significant in the group that received treatment of the temporomandibular joint and cervical vertebra (p<0.05). Conclusions: In this study, the treatment of the temporomandibular joint and cervical vertebra was shown to be effective for improving pain, quality of life, and cervical vertebra in persons with tension-type headaches. This data may be helpful in identifying treatment techniques for tension-type headaches in the future.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.10a
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• pp.860-864
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• 2004

This article discusses the use of pulse-echo ultrasonic testing for the stress analysis of adhesive bonds between metal sheets. The method is based on the measurement of the reflection wave at the metal/adhesive interface. After describing briefly the physical aspects of the phenomenon, an index is defined to detect defective zone of the joint(both for the lack of adhesive and for insufficient adhesion); the influence of the experimental variables(variables stress...) on the measurement is discussed. By means of a control experiment it is shown that Stress Variation in Adhesive Joints are separate to be distingguished. In this paper, Quantitative Nondestructive Evaluation in Adhesive Joints are together with Ultrasonic Testing and Finite Element Method.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.20 no.1
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• pp.27-34
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• 2014

Background: The purpose of this clinical case report is to confirm sacroiliac joint misalignment effects on the gait. Methods: A healthy women volunteered to participate in this case report. Measurement of the subject was performed two categories. One is physical examination of the pelvic by inspection, palpation, movement based tests and pain provocation tests. The other one is gait performance measurement by 3 dimentional motion analysis. Results: Diagnosis by physical examination of the subject was Lt. ilium posterior rotation. Pelvic, hip, knee and ankle in the 3 dimensional kinematic data, the most notable result was the ankle. Conclusion: To confirm the effect of the misalignment of the sacroiliac joint on the gait function, it must be evaluated by integrating the movement to the ankle from the lumbar.

• Journal of Institute of Control, Robotics and Systems
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• v.17 no.3
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• pp.218-222
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• 2011

This paper proposes a single-joint optical torque sensor with one body structure. Conventional optical torque sensors consist of three parts, two plates and an elastic structure. They have slightly slipping problem between plates and elastic structure due to the manufacturing tolerance. Since the order of measurement range of optical sensor is about ten micrometers, the slipping problem causes large measurement error, especially in the case of vibrational or high speed plant. This problem does not occur in the proposed design due to the one body structure. The proposed sensor has advantage of low cost, light weight, and small size. And it is easy to design and manufacture. Simulation works that analysis of stress and strain are performed accurately. To demonstrate the performance of proposed sensor, experiments were implemented to compare with a commercial force/torque sensor (ATI Mini45).

• Proceedings of the International Microelectronics And Packaging Society Conference
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• 2001.11a
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• pp.67-73
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• 2001

To investigate the relationships of solder joint characteristics with solder composition and A:V ratio (solder volume per pad area), Sn-37Pb and Sn-4.0Ag-0.5Cu solder balls with 330, 400, 450 and $457{\mu}{\textrm}{m}$ size were reflowed on same substrate. Sn-37Pb and Sn-4.0Ag-0.5Cu was reflowed at $220^{\circ}C$ and $240^{\circ}C$ respectively by IR-type soldering machine. As a result of reflowed solder- ball diameter(D) and height(H) measurement, D/H was decreased with solder ball size increment in range of 330~450 ${\mu}{\textrm}{m}$. But, D/H was increased in the solder joint for 457 ${\mu}{\textrm}{m}$ size, it was caused possibly by decrement of solder ball height increment compared with solder volume increment. As a result of shear and pull test, joint strength with A:V ratio was high. Joint strength of Sn-4.0Ag-0.5Cu was higher than Sn-37Pb. However, Sn-37Pb had more stable solder joint of small standard deviation. A thick and clean scallop type Ni-Cu-Sn intermetallic compound layer was formed in high A:V ratio and Sn-4.0Ag-0.5Cu solder joint interface.

• Journal of the Korea Society of Computer and Information
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• v.26 no.6
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• pp.37-46
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• 2021

In this paper, we designed and implemented a program to measure and to judge the accuracy of yoga postures using Azure Kinect. The program measures all joint positions of the user through Azure Kinect Camera and sensors. The measured values of joints are used as data to determine accuracy in two ways. The measured joint data are determined by trigonometry and Pythagoras theorem to determine the angle of the joint. In addition, the measured joint value is changed to relative position value. The calculated and obtained values are compared to the joint values and relative position values of the desired posture to determine the accuracy. Azure Kinect Camera organizes the screen so that users can check their posture and gives feedback on the user's posture accuracy to improve their posture.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.10a
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• pp.565-566
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• 2012