• 한국학교ㆍ지역보건교육학회지
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• 제15권1호
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• pp.77-87
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• 2014

Objectives: The Purpose of this study was to investigate the effects of chiropractic treatment and low back exercise on lumbar lordosis angle, gravity line, range of motion, and pain degree of university students who are taking a commuter bus at least 4 hours of round trip. Methods: A group of 15 participants received chiropractic treatment around the lumbar spine region twice per week for 8 weeks. Another group of 15 participants were treated with low back exercise three times per week for 8 weeks. Results: In the present results, both chiropractic treatment and low back exercise did not affect the change of lumbar lordosis. However, chiropractic treatment also significantly improved the range of the lumbar motion, including Flexion, Extension, Right Lateral Flexion and Left Lateral Flexion(p<0.05), and consequently decreased the pain degree. Low back exercise significantly moved the lumbar gravity line to almost normal scale, and improved the range of the lumbar motion, including Flexion, and Right Lateral Flexion (p<0.05), resulting in the reduction of pain degree, although both chiropractic treatment and exercise treatment did not change the lumbar lordosis angle at the statistically significant. Conclusions: From these results, it can be inferred that chiropractic treatment might be beneficial to alleviating the low back pain of the university students using a commuter bus by improving the range of lumbar motion or stabilizing the lumbar gravity line.

• 대한정형도수물리치료학회지
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• 제30권1호
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• pp.51-60
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• 2024

Background: Ankle sprains are a common clinical ankle disorder and alternations in tibiofibular joint biomechanics along with the talus are thought to contribute to its occurrence. During ankle joint dorsi flexion, proper movement requires the talus to glide posteriorly. Due to the wider front of the talus head, achieving the end range of dorsi flexion necessitates both superior and posterior glide of the distal fibula and anterior glide of the proximal fibula. The purpose of this study was to investigate the effects of tibiofibular joint mobilization on pain, range of motion, and balance in patients with lateral ankle sprains. Methods: Participants were randomly assigned to a control group (n=33) or an experimental group (n=31). Both groups underwent ankle joint mobilization three times a week for two weeks. Additionally, the experimental group received proximal and distal tibiofibular joint mobilization three times a week for two weeks. Measurements were obtained pre-intervention and post-intervention (after 2 weeks). Results: Evaluation parameters included the visual analog scale score (VAS), range of motion (ROM), and one-leg standing test (OLS). Post-intervention, both groups demonstrated significantly improved results for all assessments (p<.01). A significant intergroup difference was observed only in the ROM (p<.01) and OLS (p<.05). Conclusion: Our findings suggest that tibiofibular joint mobilization, combined with ankle joint mobilization, may be beneficial in enhancing outcomes for individuals with lateral ankle sprains.

• 한국소음진동공학회논문집
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• 제21권10호
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• pp.897-904
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• 2011

When whole-body is exposed to vertical vibration, asymmetry shape of human body affects the response on the translational(fore-aft, lateral, vertical) and rotational(roll, pitch, yaw) motion. While the translational motion has been studied with various titles, it has been rare to study the rotational motion of human body exposed to vertical excitation because of lack of experimental equipment. This study was performed by using a 6-axis force plate installing strain gage type sensors for the rotational response. Sixteen male subjects were exposed to vertical vibration on rigid seat in order to investigate apparent mass of three translational motion and apparent eccentric mass of three rotational motion. Random signal was generated to make excitation vibration which was on an effective frequency range of 3~40 Hz, and magnitude of 0.224 m/$s^2$ r.m.s. The frequency range and magnitude used was selected for the vibration of passenger vehicle on idling condition. As the result, cross-axis apparent masses of fore-and-aft and lateral direction were not significant showing 20 % and 3 % of vertical apparent mass relatively. And apparent eccentric mass of pitch motion was dominant when compared to that of roll and yaw motion, which is reasoned by asymmetry direction of human body sitting on a seat.

• 대한물리의학회지
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• 제2권2호
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• pp.113-124
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• 2007

Purpose : The purpose of this study was to investigate the effects of joint mobilization on the rang of motion and pain of patient with chronic low back pain. Methods : The subjects were consisted of thirty patients with chronic low back pain(19 females, 11 males ; mean aged 59.93) from 50 to 71. All subjects randomly assigned to the modalities treatment group, joint mobilization group. Modalities treatment group received hot pack used thermal therapy for 20minutes and ICT used electrical therapy for 15minutes, joint mobilization group received modalities treatment with sustained natural apophyseal glides(SNAGS) techniques of Mulligan for 10minutes per day and three times a week during 2 weeks period. Visual Analogue Scale(VAS) was used to measure subjective pain level. Remodified Schober test(RST) was used to measure range of motion of lumbar spine. All measurements of each patients were measured at pre-treatment and 2 weeks post-treatment. Results : The results of this study were summarized as follows : 1. VAS was joint mobilization group showed significantly decreased more than modalities treatment group (p<.05). 2. The lumbar flexion range of motion was joint mobilization group showed significantly decreased more than modalities treatment group(p<.05). 3. The lumbar extension range of motion was joint mobilization group showed significantly decreased more than modalities treatment group(p<.05). 4. The lumbar left lateral flexion range of motion was joint mobilization group showed significantly decreased more than modalities treatment group(p<.05). 5. The lumbar right lateral flexion range of motion was joint mobilization group showed significantly decreased more than modalities treatment group(p<.05). Conclusion : These data suggests that SNAGS of Mulligan is beneficial treatment for chronic low back pain.

• Physical Therapy Rehabilitation Science
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• 제3권1호
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• pp.63-68
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• 2014

Objective: The purpose of this study was to examine the effects of ankle Kinesio taping on range of motion and agility during exercise in university students. Design: Cross-sectional study. Methods: Thirty subjects were randomly allocated to two groups: taping group (n=15) and non-taping group (n=15). All groups underwent the same exercise program including stretching for 30 minutes. The exercise program proceeded in the following order: five minutes of stretching, a 20-minutes exercise program, and additional five minutes of stretching. Of the eight exercise methods suggested by Purcell et al, seven were chosen (lateral shuffle, forward and backward running, agility ladder, figure-of-8, forward jogging while jumping over cones, wall jumps and zigzags); $90^{\circ}$ cuts with lateral shuffle were omitted. The range of motion of ankle dorsiflexion and plantarflexion was measured using the goniometer. Agility was measured using the side hop test. Results: For ankle range of motion, the taping group showed significant differences in dorsiflexion and plantarflexion on both sides (p<0.05). The non-taping group showed significant differences only in left plantarflexion (p<0.05). There was a significant difference in dorsiflexion on both sides between the taping group and the non-taping group (p<0.05). All groups showed significant differences in agility on the left and right ankle (p<0.05). There was a significant difference in left ankles between the taping group and the non-taping group (p<0.05). Conclusions: Kinesio taping increased range of motion and agility during exercise in university students. Additional research on Kinesio taping for improving range of motion and agility is needed.

• 센서학회지
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• 제30권1호
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• pp.30-35
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• 2021

To operate an underwater robot in an environment with fluid flow, it is necessary to recognize the speed and direction of the fluid and implement motion control based on these characteristics. Fish have a lateral line that performs this function. In this study, to develop an artificial lateral line sensor that mimics a fish, we developed a method to measure the flow speed and the incident angle of the fluid using a pressure sensor. Several experiments were conducted, and based on the results, the tendency according to the change in the flow speed and the incident angle of the fluid was confirmed. It is believed that additional research can aid in the development of an artificial lateral line sensor.

• Earthquakes and Structures
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• 제14권1호
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• pp.33-44
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• 2018

Base-isolated nuclear power plant (BI-NPP) structures are founded on expanded basemat as a flexible floating nuclear island, are still lacking the recommendation of the consideration of incoherent motion effect. The effect of incoherent earthquake motion on the seismic response of BI-NPP structure has been investigated herein. The incoherency of the ground motions is applied by using an isotropic frequency-dependent spatial correlation function to perform the conditional simulation of the reference design spectrum compatible ground motion in time domain. Time history analysis of two structural models with 486 and 5 equivalent lead plug rubber bearing (LRB) base-isolators have been done under uniform excitation and multiple point excitation. two different cases have been considered: 1) Incoherent motion generated for soft soil and 2) Incoherent motion generated for hard rock soil. The results show that the incoherent motions reduce acceleration and the lateral displacement responses and the reduction is noticeable at soft soil site and higher frequencies.

• 대한기계학회논문집
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• 제19권2호
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• pp.519-526
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• 1995

Experiments have been performed to test the analytical tools developed concurrently for the motion-related unsteady pressure in annular passages. The outer cylindrical body was oscillated by a shaker in either rocking motion about a hinge-point or lateral translation motion. In the equilibrium configuration the two bodies are either concentric or eccentric, in the plane of oscillation or normal to it. The unsteady pressure generated by the oscillatory motion with low amplitudes (displacement/radius) was measured on wall of the fixed inner cylinder at various axial and azimuthal locations. The unsteady pressure were compared with theoretical predictions, and agreement was found to be within 10%. Experiments have been shown that the effect of flow velocity on the unsteady pressure is minimal and the pressure increases more or less with oscillatory motion, for low flow velocities (Re = 2 900).

• 대한족부족관절학회지
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• 제15권3호
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• pp.153-158
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• 2011

Purpose: This study was performed retrospectively and to compare the clinical outcomes of the surgical management using Antiglide plating and lateral plating for Danis-Weber type B isolated lateral malleolar fractures. Materials and Methods: Between March 2004 and March 2009, 92 patients were followed up for more than 6 months after surgical treatment. 49 patients were treated with Antiglide plating, whereas the remaining 43 patients underwent lateral plating. The results of the two groups were analyzed both radiographically and clinically using Ankle scoring system. Results: Both groups were comparable for age, sex distribution, time to surgery, and operation time. Bone union was noted at average of 8 weeks in all fractures. The mean ankle score was similar in both groups (94% versus 93%). Conclusion: Antiglide plating for Danis-Weber type B isolated lateral malleolar fracture is one of the good methods which has some advantages such as early ankle motion, ambulation and smaller operative incision.

• 한국해양학회지
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• 제30권6호
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• pp.565-583
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• 1995

난수성 eddy의 운동에 있어서 경계면 마찰과 해저지형의 중요성을 연구하기 위하여 비선형 QG-모델이 사용되었다. 수직구조를 나타내는 유선함수의 경험적 직교함수는 순압과 제 1 경압 역학 함수를 표현한다. 이 모델은 10 km ${\times}$ 10 km의 격자간격을 지닌 1000 km ${\times}$ 1000 km으로 구성되어 있고 360일동안 시험하였다. 대한해협을 통한 유입량은 쓰가루해협을 통하여 빠져 나간다. 울릉분지내(평평한 해저지형)에서는 QG방정식의 비선형 이류항과 ${\beta}$-효과사이에 균형이 난수성 eddy를 북쪽으로 이동하게 한다. 대륙사면위에서의 난수성 eddy는 비선형항이 중요하게 작용하지만, 평평한 지형에서는 보조적인 역활을 한다. 해저지형이 변화하는 해역에서 난수성 eddy의 비선형항은 시간의 함수이다. 강한 eddy는 북쪽으로 이동한다. Eddy의 세기가 약해지면, 비선형항과 지형적인 베타효과항이 균형을 이루게 된다. Eddy의 분산과 함께 비선형성이 감소하므로서, 지형적 Rossby파 개념에 의하여 난수성 eddy는 대륙사면을 따라서 남하한다. 수치실험은 난수성 eddy의 운동에 미치는 경계면 마찰의 중요성을 확인하였다. 난수성 eddy의 북쪽 침투거리는 경계면 마찰계수의 감소로 증가하게 된다 아울러 Reynolds number의 감소로 북쪽이동을 방지할 수 있다. 또한 이 난수성 eddy운동과정에 있어서 해저지형이 중요한 역할을 하는 것이 제시되었다.