• 대한족부족관절학회지
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• 제15권4호
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• pp.207-211
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• 2011

Purpose: To evaluate the results of conservative treatment of zone I, II $5^{th}$ metatarsal base fracture. Materials and Methods: Between May 2004 and June 2010, a total of 58 patients of zone I, II $5^{th}$ metatarsal base fractures were included in this study. The mean length of follow-up was 13.5 months (12~36 months). All of the patients were treated with full-weight-bearing short leg cast immobilization for 4 weeks and wooden sole shoes for 4 weeks. The results were evaluated about the radiographic union, the midfoot scale of American Orthopaedic Foot and Ankle Society (AOFAS), the tenderness on fracture site and other complications. Results: All patients were able to return to their prior levels of activity. The mean time for union as shown on radiographs was 45.5 days, and the mean midfoot scale of AOFAS was 99.7 points. There were no nonunions or refractures during the follow-up. Conclusion: The conservative treatment with full-weight-bearing short leg cast and wooden sole shoes seems to give good results for zone I, II $5^{th}$ metatarsal base fracture.

• 토지주택연구
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• 제4권2호
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• pp.185-192
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• 2013

이 논문에서는 저층 경량건물을 대상으로 고성능 내진을 구현하기 위하여 적용된 복합면진시스템의 적용효과가 비선형해석과 현장실험을 통하여 제시되었다. 이 연구에서 적용된 복합면진시스템은 슬라이딩베어링(sliding bearing)과 적층고무베어링(laminated rubber bearing)을 혼용하는 방법으로 전체 면진시스템의 고유주기를 신장시키는데 있어서 적층고무베어링이 지니는 한계를 극복하기 위한 것이다. 비선형해석결과, 복합면진시스템을 채용하여 설계된 면진건물은 아주 드물게 발생하는 강진에 대해서도 최대응답변위가 허용설계변위 이내이며, 최대응답전단력이 설계지진력 이하이므로 안전하게 유지될 수 있음을 알 수 있었다. 또한 현장실험결과, 면진층의 강성은 설계 등가강성 값의 약 95.8%에 해당하는 값을 나타내 전체 면진시스템의 실제 특성이 설계값과 잘 일치하고 있음을 확인할 수 있었다.

• 대한정형외과학회지
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• 제56권2호
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• pp.150-156
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• 2021

목적: 제5 중족골 기저부 골절의 위치와 전위, 관절 침범, 분쇄 등의 특징이 조기 체중부하 치료의 결과에 어떤 영향을 미치는지 알아보고자 하였다. 대상 및 방법: 2013년 1월부터 2017년 7월까지 인제대학교 부산백병원에 내원하여 제5 중족골 기저부 제1, 2 구역 골절로 진단 받은 총 34명의 34예를 대상으로 하였다. 평균 추시 기간은 13개월(6-15개월)이었다. 동 기간 동안 수술적 치료를 시행한 경우는 없었고 1명의 경우 추시 기간 중 이전 골절 부위와 다른 부위의 재골절로 제외되었으며 총 33예 모두 보존적 치료를 시행하였다. 족부의 전후면, 측면 및 경사 방사선 촬영 및 컴퓨터 단층 촬영을 시행하여 골절의 위치와 전위, 관절 침범, 분쇄의 정도를 평가하였다. 33명의 모든 환자에게 있어서 수상 직후부터 단하지 석고고정 혹은 탈착 가능한 부츠형 보조기를 선택하여 착용 후 통증이 허용되는 범위 내에서 부분적인 체중부하를 허용한 뒤 통증이 소실되면 일반 신발 또는 수술 후 신발을 착용 후 전 체중부하를 시행하게 하였다. 임상적 결과로 최종 추시 시에 American Orthopedic Foot and Ankle Society (AOFAS) score를 평가하였다. 외래 추시 시 족부의 단순 방사선 촬영을 하여 방사선적 골유합 시기와 업무로의 복귀 시기를 확인하였다. 결과: 총 33명의 환자가 본 연구에 참여하였고(남자 9명, 여자 24명), 환자들의 평균 나이는 48.7세(16-80세)였다. 제1 구역이 24명, 제2 구역이 9명이었고 전체 33명의 환자 중 22명에서 2 mm 이상의 골절 전위가 관찰되었고 관절 침범은 9명, 분쇄 골절은 5명에서 관찰되었다. 제1 구역에서 제2 구역에 비하여 통계적 의미 있는 업무로의 복귀를 보였고 최종 추시 시 AOFAS score는 우수한 결과를 보였고 통계적 차이는 없었다. 골절의 전위 정도, 관절 침범 여부, 분쇄 정도를 분류, 비교하였을 때 방사선적 유합 시기, 업무 복귀 시기에 있어 통계적 차이는 없었으며 모든 경우에 있어 최종 추시 시 만족할 만한 결과를 보였다. 결론: 제5 중족골 기저부 골절에서 골절의 위치, 전위, 관절 침범, 분쇄 여부에 관계없이 조기 체중부하를 허용하여도 만족할 만한 임상적 결과를 얻을 수 있다. 제5 중족골 기저부 골절에서 조기 체중부하하 보존적 치료는 우수한 임상 결과를 얻을 수 있는 좋은 치료 방법이라 생각된다.

• 한국전문물리치료학회지
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• 제14권2호
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• pp.11-20
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• 2007

The development of neonatal neuromuscular system is accomplished by the functional interaction between the spinal neurons and its target cells, skeletal muscle cells, and the intrinsic and extrinsic factors affecting this process. The aim of this study was to identify the effect of suspension unloading (SU) and neuromuscular electrical stimulation (NMES) upon the development of the neonatal spinal cord. For this study, the neonatal rats were randomly divided into three groups: a control group, an experimental group I, and an experimental group II. The SU for experimental group I and II was applied from postnatal day (PD) 5 to PD 30, and the NMES for experimental group II was applied from PD 16 to PD 30 using NMES that gave isometric contraction with 10 Hz for 30 minutes twice a day. In order to observe the effect of SU and NMES, this study observed neutrophin-3 (NT-3) and microtubule associated protein 2 (MAP2) immunoreactivity in the lumbar spinal cord (L4-5) at the PD 15 and PD 30. The results are as follows. At PD 15, lumbar spinal cord of experimental group I and II had significantly lower NT-3 and MAP2 immunoreactivity than control group. It proved that a microgravity condition restricted the spinal development. At PD 30, lumbar spinal cord of control group and experimental group II had significantly higher NT-3 and MAP2 immunoreactivity than experimental group I. It proved that the NMES facilitated the spinal development by spinal cord-skeletal muscle interaction. These results suggest that weight bearing during the neonatal developmental period is essential for the development of neuromuscular development. Also, the NMES on its target skeletal muscle can encourage the development of the spinal cord system with a full supplementation of the effect of weight bearing, which is an essential factor in neonatal developmental process.

• 대한관절경학회지
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• 제1권1호
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• pp.86-90
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• 1997

Good stability and complete range of motion should be the ultimate goal of a rehabilitation program after ACL reconstruction. In previous years. the rehabilitation of the ACL reconstructed knee focused on protecting the new ligament by blocking terminal knee extension, hut, despite good stability, this approach led to numerous postoperative complications. Nowadays, most of surgeons agree the accelerated rehabilitation program based on the concept of ligamentization and clinical experience. Accelerated rehabilitation program consists of maintain of full extension of the knee, early weight bearing and prompt recovery of ROM, and closed kinetic chain exercise. Meeting this goal requires effective communication between-members of the health care team-the physician, physical therapist, atheletic trainer, and the patient. We have to know the importance of rehabilitation, knowlege about the physical therapy, and to introduce for special physical therapist and equipment.

• 대한족부족관절학회지
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• 제16권3호
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• pp.190-192
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• 2012

In the extremity surgery, pneumatic tourniquet and povidone-iodine solution are commonly used to provide an aseptic, bloodless field, and their complication rate has remained low. However, chemical burn under tourniquet has been rarely reported. Patients sustained burn injuries over the dependent, weight-bearing regions such as posterior neck, back, buttocks and posterior thighs. This rare adverse complication occurred in a 22-year-old man who underwent modified Brostrom operation with arthroscopic os trigonum excision. 10% povidone-iodine was used as topical antiseptic, and full thickness burn occurred underneath the area of tourniquet application. Main causes of povidone-iodine related chemical burn are considered maceration, irritation of the skin, long term use of the tourniquet and pressure. To reduce the complications like chemical burn, awareness of the risk and the possible pathogenesis as well as the preventive measures is important in surgical practice.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2001년도 유체기계 연구개발 발표회 논문집
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• pp.197-202
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• 2001

The heat produced by the fission in the fuel of HANARO, 30 MW of research reactor, was transferred from the primary cooling water to the secondary cooling water through heat exchangers. The secondary cooling water absorbed the heat was circulated by secondary cooling pumps and cooled through 33 MW of cooling tower. Each capacity of the three secondary cooling pumps was fifty percent ($50\%$) of full load. The two pumps were normally operated and the other pump was standby. One of the secondary cooling pumps has often get troubles by high vibration. To release these troubles the pump shaft has been re-aligned, the pump bearing has been replaced with new one, the shaft sleeve has been replaced with new one, the shaft and the impeller have been re-weight balanced representatively or the vibration of motor has been tested by disconnecting the shaft of pump. But the high vibration of pump cannot be cleared. We find out the weight balance trouble of the assembly that the impeller is installed in the shaft. After clearing the trouble, the high vibration is released and the pump is operated with smooth. In this paper the trouble solution of secondary cooling pump is described including the reason of high vibration.

• 한국전문물리치료학회지
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• 제28권3호
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• pp.215-226
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• 2021

Background: Robot-assisted gait training (RAGT) is an effective method for walking rehabilitation. Additionally, the body weight support (BWS) system reduces muscle fatigue while walking. However, no previous studies have investigated the effects of RAGT with BWS on isokinetic strength of quadriceps and hamstring muscles. Objects: The purpose of this study was to investigate the effects of torque, work, and power on the quadriceps and hamstring muscles during RAGT, using the BWS of three conditions in healthy subjects. The three different BWS conditions were BWS 50%, BWS 20%, and full weight bearing (FWB). Methods: Eleven healthy subjects (7 males and 4 females) participated in this study. The Walkbot_S was used to cause fatigue of the quadriceps and hamstring muscles and the Biodex Systems 4 Pro was used to measure the isokinetic torque, work, and power of them. After RAGT trials of each of the three conditions, the subjects performed isokinetic concentric knee flexion and extension, five at an angular velocity of 60°/s and fifteen at an angular velocity of 180°/s. One-way repeated analysis of variance was used to determine significant differences in all the variables. The least significant difference test was used for post-hoc analysis. Results: On both sides, there were significant differences in peak torque (PT) of knee extension and flexion between the three BWS conditions at an angular velocity of 60°/s and 180°/s conditions. A post-hoc comparison revealed that the PT in the BWS 50% was significantly greater than in the BWS 20% and the FWB and the PT in the BWS 20% was significantly greater than in the FWB. Conclusion: The results of this study suggest that the lower BWS during RAGT seems to lower the isokinetic torque, work, and power of the quadriceps and hamstring muscles because of the muscle fatigue increase.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2018년도 추계학술대회
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• pp.241-247
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• 2018

Deep-sea fishing vessel No. 501 Oryong was fully flooded through its openings and sunk to the bottom of the sea due to the very rough sea weather on the way of evasion after a fishing operation in the Bearing Sea. As a result, many crew members died and/or were missing. In this study, a full-scale ship flooding and sinking simulation was conducted, and the sinking process was analyzed for the precise and scientific investigation of the sinking accident using a highly advanced Modeling & Simulation (M&S) system of the Fluid-Structure Interaction (FSI) analysis technique. To objectively secure the weather and sea states during the sinking accident in the Bering Sea, time-based wind and wave simulation at the region of the sinking accident was conducted and analyzed, and the weather and sea states were realized by simulating the irregular strong wave and wind spectrums. Simulation scenarios were developed and full-scale ship and fluid (air & seawater) modeling was performed for the flooding sinking simulation, by investigating the hull form, structural arrangement & weight distribution, and exterior inflow openings and interior flooding paths through its drawings, and by estimating the main tank capacities and their loading status. It was confirmed that the flooding and sinking accident was slightly different from a general capsize and sinking accident according to the simple loss of stability.

• 한국음향학회지
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• 제21권1호
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• pp.62-68
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• 2002

MVDR (Minimum Variance Distortionless Response) 빔형성 기법은 간섭신호의 영향을 최소화하는 기법으로서 방위각 분해능은 우수하나, 높은 주파수 분해능을 얻기 위해서는 오랜 시간 동안 관측한 많은 양의 데이터가 필요하다. 짧은 빔출력 시간에 높은 주파수 분해능을 얻기 위해 기존의 SW (Steered Minimum Variance) 기법에서는 조향 공분산행렬 (steered covariance matrix)을 이용하여 전체 주파수 대역에 대하여 동일한 적응 가중벡터 (adaptive weighting vector)를 사용한다. 본 논문에서는 각 주파수별로 보다 정확한 적응 가중벡터를 얻기 위해 전체 대역을 여러 개의 부대역 (subband)으로 나누고, 각 부대역에 대한 적응 가중벡터를 얻는 SSMV(Subband Steered Minimum Variance) 기법을 제안한다. 연산량과 부대역의 크기를 줄이기 위해 전체배열을 여러 개의 부대열 (subarray)로 나누고, 각 부대역별로 적응 가중벡터를 구한다. 제안한 SSMW 기법의 성능을 확인하기 위해 실제 해상실험 데이터를 이용하여 신호처리를 하였으며, 그 결과 제안한 기법의 우수한 성능을 확인하였다.