• The korean journal of orthodontics
• /
• v.35 no.2 s.109
• /
• pp.116-126
• /
• 2005

The object of this study was to evaluate how friction that occurs during the sliding movement of an orthodontic archwire through orthodontic brackets is differently affected by variant designs and ingredients of brackets and archwires and bracket-archwire angles. In order to simulate the situations which could occur during orthodontic treatment with fixed appliances, 4 types of brackets (Gemini, a stainless steel twin bracket, Mini Uni-Twiu. a stainless steel bracket with a single bracket design and narrow mesio-distal width; Clarity, a metal-reinforced ceramic bracket; Transcend, a ceramic bracket) and 3 types of orthodontic archwires $(0.016',\; 0.016{\times}0.022'\;stainless\;steel,\;0.016'\;Nitinol)$ were used and the bracket-archwire angles were controlled as $0^{\circ},\;3^{\circ}\;6^{\circ},\;and\;9^{\circ}$ Gemini significantly show and the lowest static and kinetic frictions (P<0.001) Clarity showed the highest static and kinetic frictions with a bracket-archwire angle of $0^{\circ}$. and Transcend at $6^{\circ}\;and\;9^{\circ}$ (P<0.001). An $0.016{\times}0.022'$ stainless steel rectangular archwire significantly showed the highest static and kinetic frictions (P<0.01). The lowest static and kinetic frictions were observed when the bracket-archwire angles were $0^{\circ}\;and\;3^{\circ}$ with 0.010' stainless steel round archwires (P<0.01), and $6^{\circ}\;and\;9^{\circ}$ with 0.016 Nitinol (P<0.001). The static and kinetic frictions were increased as the bracket-archwire angles were increased (P<0.001)

• Journal of the Korea Society of Computer and Information
• /
• v.29 no.9
• /
• pp.159-167
• /
• 2024

In this study, a total of 32 individual musculoskeletal examinations were performed to prevent sarcopenia through squatting exercises and corrective exercises in the elderly, and then squatting exercises and corrective exercises were performed twice a week for 12 weeks to apply and improve various exercise programs, and the following results were obtained. Body composition was significantly increased in skeletal muscle mass and basal metabolism after 12 weeks compared to before participation in the exercise program, and static postural balance was significantly improved in front shoulder, pelvic balance and deflection, left leg medial and lateral cervical and thoracic spine, and pelvic tilt after 12 weeks. Dynamic postural balance showed that the composite imbalance index, excessive upper body lean, lumbar lordosis or kyphosis, and single knee tilt and drop were all highly significant postural balances after 12 weeks. As shown in this study, the variety and precise analysis of exercise prescriptions for customized exercise programs for the elderly is very important, and it is necessary to pay attention to research on the maintenance and promotion of elderly health through practical applications in the field.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.16 no.3
• /
• pp.2064-2072
• /
• 2015

The aim of this study is to identify the effects of the correction exercise program on femoral intercondylar distance, Q-angle and plantar pressure in undergraduate with genu varum. A experimental study with a randomized controlled trial design was used. Thirty subjects with genu varum were allocated in two groups: the experimental group (n=15) or the control group (n=15). The experimental group conducted correction exercise program for 30 minutes a day, 5 times a week, for 6 weeks, while the control group did not perform any exercise. The correction exercise program group showed a significant decreased femoral intercondylar distance, plantar pressure of M 4, M 5 (Metatarsal 4, 5). Also the correction exercise program group significantly increased Q-angle, plantar pressure of Toe 2-5 and M 1, M 2, M 3 (Metatarsal 1, 2, 3) (Rt, Lt) (p<.05). Thus, we suggested that the correction exercise program may be suitable intervention to improve normal alignment in undergraduate with genu varum.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.19 no.4
• /
• pp.781-790
• /
• 2024

As modern people's interest in exercise and health increases, the demand for exercise-related information and devices is increasing, and exercising in the wrong posture can lead to body imbalance and injury. Therefore, in this study, the purpose of this study is to correct the posture for health promotion and injury prevention through the correct exercise posture of users. It was developed using Arduino Uno R3, a pressure sensor, and an acceleration sensor as the main memory device of the system. The pressure sensor was used to determine the squat posture, and the acceleration sensor was used to determine three types of gait: normal step, nasolabial step, and saddle step. Data is transmitted to a smartphone through a Bluetooth module and displayed on an app to guide the user in the correct exercise posture. The gait was determined based on the 20˚ angle at which the foot was opened, and the correct squat posture was compared with the ratio of the pressure sensor values of the forefoot and hindfoot based on the data of the skilled person. Therefore, based on an experiment with about 90% accuracy when determining gait and 95% accuracy based on a 7:3 ratio of pressure sensor values in squat posture, a system was established to guide users to exercise in the correct posture by checking in real time through a smartphone application and correcting exercise in the wrong posture.

• Journal of the Korea Convergence Society
• /
• v.9 no.2
• /
• pp.303-311
• /
• 2018

Squat exercise is one of the free weight exercises that are recognized as important from a bio-mechanical point of view. It is an important exercise to train lower extremity muscles in daily activities or sports activities and to strengthen trunk and lower body strength. It is effective and accurate to use a variety of assistive devices to calibrate athletic posture with squat exercise supported interactive device. The issues of the structural analysis for design a foot plate for squat exercise is to model the behavior by simplifying the dynamic behavior. In this paper, the authors proposed a exercise system design method for the vertical load distribution and bio-mechanical signal process used for the squat exercise mechanism analysis, and based on these results, designed device can make the more safe and reliable free weight exercise. It is applied to system design through design method with kinematic dynamic, VR device and estimation model of exercise.

• Journal of Korea Entertainment Industry Association
• /
• v.14 no.7
• /
• pp.581-587
• /
• 2020

The Many patients who have lumbar instability(LI) could make a different trunk movement pattern by reduction of their respiratory function and altered breathing pattern. This study was conducted to investigate the change in the thoracoabdominal usage rate(TAUR) on three circumference lines(axillary, xiphoid junction, 10th rib) during the resting and forced breathing (RB and FB) after respiratory pattern correction(RPC) exercises in patients with LI. 15 patients in the experimental group performed RPC exercises, and 15 patients in the control group conducted lumbar stabilization exercises. Before the intervention, both groups had a significant difference in the usage rate among the three thoracoabdominal lines during the RB and FB(p<.05). After the intervention, the experimental group was seen no significant difference in the usage rate among the three lines during the RB(p>.05) and exhibited significant differences in the usage rate between the two thoracoabdominal lines during the FB(p<.05). The RPC exercises might improve the trunk movement patterns by restoring the respiratory patterns. We suggest that the RPC can apply in the re-education and reinforcement process at the reha-program for LI patients.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• v.2
• /
• pp.443-446
• /
• 2006

INS를 사용하는 지상항법시스템은 GPS 등의 보조 센서와 관계없이 다양한 환경에서 장시간 운용시 항법 성능을 보장하기 위하여 재교정 과정을 거쳐야 한다. 본 논문에서는 이러한 재교정 절차 없이 장시간의 반복적인 사용에도 신뢰할 수 있는 항법해를 제공하기 위한 동작간 교정 기법에 대한 기초 연구를 수행한다. 이를 위하여 지상항법시스템에 나타나는 다양한 운동 특성을 묘사할 수 있는 시뮬레이터를 개발하고, 각 운동 특성에서의 가관측성 해석과 INS와 GPS의 항법 출력 특성을 분석한다.

• Korean Security Journal
• /
• no.25
• /
• pp.89-107
• /
• 2010

The purpose of this study was to evaluate the effects of using cervical spinal stabilization exercise for the improvement of pain intensity, cervical range of motion, neck disability index, reposition sense, muscle tenderness with chronic neck pain in private security. For 21 patients diagnosed with chronic cervical pain and divided into cervical spinal stabilization exercise group and postural correction exercise group. Each exercise was conducted for 8 weeks. Pain and neck disability index were measured before and after exercise using the visual analogue scale(VAS) and the neck disability index(NDI). Range of motion were measured electronic goniometer, muscle tenderness of upper trapezius ad sternocleidomatoid were measured algometer, reposition sense were measured reposition panel before and after exercise. After 8 weeks of exercise, the cervical stabilization exercise group pain and neck disability were significantly decreased(p<0.05). Also there was significant difference in both group(p<0.05). In addition, range of motion, muscle tenderness reduce rate, reposition sense were significantly increase as compared to the pre-post exercise in cervical stabilization exercise group(p<0.05). But there was no significantly difference in postural correction group before and after exercise(p>0.05). And there was significantly increase more cervical stabilization exercise group than postural correction exercise group in range of motion, muscle tenderness reduce, reposition sense. In summary, cervical spinal stabilization exercise is more effective in improving cervical range of motion, muscle pain, reposition sense in private security on chronic cervical pain patients, in reducing patients' pain and disability. It is an effective treatment to aid rehabilitation in these cases.

• The Journal of the Korea Contents Association
• /
• v.14 no.10
• /
• pp.210-217
• /
• 2014

This study is to present objective data for the approaches of therapeutic exercise for the correction of genu varum by making an analysis and a comparison of the hip joints' ROM and isokinetic muscles of the female college students with straight legs with those of a female college student with idiopathic genu varum. Additionally, the state of the adductor muscle's thighs and the deep muscles of the subjects with bowed legs were experimented and the equipment's effect and applicability was reviewed through the process of the movement of newly developed exercise equipment, Balloa(2013, Balloa/Adonia/Korea). As a result, a person with genu varum needs the height increasing method for increasing external rotation ROM of a hip joint and requires the exercise techniques to strengthen external rotator muscles and to inhibit the activity of internal rotator muscles of a hip joint. Balloa increases the external rotation ROM of a hip joint and strengthens gluteal muscles, deep muscles, and adductor muscles, and the equipment's function of muscle strengthening shows that the equipment is an effective corrective exercise for the patients of genu varum.

• Journal of the Korean Society of Radiology
• /
• v.8 no.7
• /
• pp.397-400
• /
• 2014

This study purpose is to know about the effect of Cobb's angle of scoliosis patient by Pilates ecercise. It was executed for prove this exercise with Pilates Postural Correct Exercise(PCE), Spine Stretching Exercis(SSE), Muscle Strengthing Exercise(MSE). PCE is useful for unbalanced muscle energy and SSE gives relax for hypertensioned muscles and MSE is correcting balance for prime mover and secondary mover and so it will be recovery for elasticity and flexibility of paraspine muscles. The method study was proved with a Cobb's angle measurement of Lumbar spine by X-ray test before and after. As a result for the test, Cobb's angle by X-ray it shows reduced about 5 degree in statistics(p=0.005). And so It shows the Pilates exercise gives reduce for Scoliosis.