• The Journal of Korean Physical Therapy
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• 제22권2호
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• pp.15-23
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• 2010

Purpose: This study was done to establish reference data for temporo-spatial, kinematic and kinetic parameters for normal Koreans as they age. Methods: Normal adults and children without a previous history of musculoskeletal problems were enrolled in this study. The normal subjects were divided by age into three groups: Group I: children ($11.95{\pm}0.29$ years); Group II: young adults ($23.90{\pm}3.67$ years); Group III: older adults ($71.40{\pm}4.08$ years). The temporo-spatial and kinematic data were measured using 6 MX3 cameras while each subject walked through a 10 m walkway at a self-selected speed. The kinetic data were measured using 2 force plates and were calculated by inverse dynamics. Results: Motion patterns are typically associated with a specific phase of the gait cycle. Our results were as follows: 1. There were significant differences between the different age groups in temporo-spatial parameters such as cadence, double support, time of foot off, stride length, step length, and walking speed. 2. There were significant differences between the groups in kinematic parameters such as range of motion (ROM) of the hip, knee and ankle in the sagittal plane, ROM of the pelvis, hip and knee in the coronal plane and ROM of the pelvis, hip and ankle in the transverse plane. 3. There were significant differences between the groups in kinetic parameters such as joint moments of force, joint mechanical power generation or absorption and ground reaction forces. Conclusion: The results of this study can be utilized (a) as a reference for kinematic and kinetic data of gait analysis in normal Koreans, and (b) as an aide in evaluating and treating patients who have problems relating to gait.

• 한국산학기술학회논문지
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• 제17권1호
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• pp.459-467
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• 2016

최근, 도로를 따라 지하 5~7m의 저심도에 설치되는 저심도 도시철도시스템의 경제성을 확보하기 위해, 신개념의 모듈식 개착 시공법을 개발 중에 있다. 본 연구에서는 상부 슬래브간의 연결부에 대한 구조성능 검증을 위해 루프이음을 가진 프리캐스트 철근콘크리트 부재들의 4점 재하 실험을 수행하였다. 전체 11개의 실험체가 제작되었으며 단면형상, 이음부 형상, 이음길이, 횡방향 보강철근을 변수로 이음이 없는 전단면 및 반단면 실험체와 비교하였다. 실험결과, 루프이음 실험체는 항복하중과 최대하중시 변위량 차이가 컸으며 이는 항복이후 접합부에서 발생한 균열이 확장됨에 따라 강성저하로 변위량이 급격히 증가한 것으로 판단된다. 또한 200mm의 루프이음을 가진 반단면 실험체의 경우, 이음이 없는 기준 실험체에 상당하는 휨성능을 확보하며 200mm 초과시 휨성능 향상의 정체기를 보였다.

• 대한건축학회논문집:구조계
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• 제34권4호
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• pp.15-23
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• 2018

The purpose of this study is to evaluate the anchorage capacity of longitudinal bars for reinforced concrete exterior beam - column joints with steel fiber volume fractions. For this purpose, the steel fiber volume fraction was set to 0, 1, 2%, and the performance was compared with that of each other specimens. According to the test results, the maximum strength of EX-HK-NJR-0 decreased by 13% compared with the control specimen and EX-HK-NJR-1 decreased by 3% compared to the control specimen. However, when 2% of steel fiber was mixed, the maximum strength increased about 56% compared to the control specimen. The energy dissipation capacity of EX-HK-NJR-0 (when no transverse steel bars are placed) decreased by 61% compared to the control specimen. In addition, the energy dissipation capacity of the specimens with a steel fiber content of 1% decreased by 5% and 2% increased by 94% compared to control specimen. EX-HK-NJR-1,2 and the control specimen EX-HK-JR-0 experienced yielding of the reinforcing bars at the column interface before maximum strength development. However, when the EX-HK-NJR-0, the reinforcing bars at the column interface experienced yielding after maximum strength development. Therefore, reinforcement of steel fiber is considered to reduce the required development length for yielding of steel bars.

• 대한정형도수물리치료학회지
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• 제29권1호
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• pp.81-93
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• 2023

Purpose: The current case study focuses on identifying the effects of manual therapy and home self-therapeutic exercise including on mouth opening and pain relief in patients with continuous neck pain with myofascial temporomandibular disorders (TMDs) accompanied by headache induced by masticatory myalgia Subjects: The study participant was a 27-year-old woman who was treated a year ago for pain related to TMDs accompanied by a headache. Methods: Manual therapy of the cervical spine with upper cervical spine posterior-to-anterior mobilization (C1~C2), upper cervical spine flexion mobilization (C0~C2), upper cervical spine lateral flexion mobilization (C0~C1), upper cervical spine thrust manual therapy (C1~C2) and manual therapy of the temporomandibular joint and muscles with transverse medial accessory temporomandibular joint mobilization, manual therapies for the temporal, the masseter, and medial pterygoid muscles were performed twice a week for about 30 minutes for 4 weeks. This protocol included 3 sessions in total. The home self-therapeutic exercise was to be performed two to three times a day. Results: The values more improved MMO increased to 41.4 mm, left masseter muscle PPT to 2.9 kgf/cm², right masseter muscle PPT to 3.1 kgf/cm², KHIT-6 to 46 points, neck pain intensity (by NRS) to 2 points, headache frequency to per weeks, cervical kyphotic angle to -8.06%, and GCPS to grade 1 (low-intensity pain without pain-related disorder). Conclusion: Manual therapy and home self-therapeutic exercise can be helpful for mouth opening and pain relief in patients with myofascial TMDs accompanied by secondary headaches induced by masticatory myalgia.

• 한국임상수의학회지
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• 제40권2호
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• pp.135-138
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• 2023

A one-month-old Thoroughbred colt presented with left hindlimb lameness grade 5/5, according to the American Association of Equine Practitioners' lameness scale. The colt started showing signs of lameness two weeks earlier without being involved in an accident. A local veterinarian examined the foal; radiography revealed no significant findings under the hip joint. No improvement was noted after 15 days of non-steroidal anti-inflammatory drugs (NSAIDs) medication. On presentation at our hospital, ultrasonography was performed, which revealed no significant findings in the iliac wings. The foal underwent a computed tomography (CT) scan under general anesthesia. CT revealed bone cysts in the following that could have caused the lameness: the left transverse process of the 5th, 6th lumbar, and the 1st sacrum vertebrae; osteophytes in the auricular surface of the ilium, suggestive of sacroiliac arthritis. The foal recovered smoothly from anesthesia with assistance. The foal was treated with NSAIDs and rested for more than six months. The owner reported that the foal showed no lameness one year later. CT revealed bony changes in the lumbosacral region that were not detected by radiography and ultrasonography, suggesting that CT could be useful for detecting abnormalities in the pelvic region of horses.

• Clinical Pain
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• 제18권2호
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• pp.59-64
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• 2019

Objective: This study evaluated the feasibility of ultrasound-guided lumbar nerve root block (LNRB) and S1 nerve root block by identifying spread patterns via fluoroscopy in cadavers. Method: A total of 48 ultrasound-guided injections were performed in 4 fresh cadavers from L1 to S1 roots. The target point of LNRB was the midpoint between the lower border of the transverse process and the facet joint at each level. The target point of S1 nerve root block was the S1 foramen, which can be visualized between the median sacral crest and the posterior superior iliac spine, below the L5-S1 facet joint. The injection was performed via an in-plane approach under real-time axial view ultrasound guidance. Fluoroscopic validation was performed after the injection of 2 cc of contrast agent. Results: The needle placements were correct in all injections. Fluoroscopy confirmed an intra-foraminal contrast spreading pattern following 41 of the 48 injections (85.4%). The other 7 injections (14.6%) yielded typical neurograms, but also resulted in extra-foraminal patterns that occurred evenly in each nerve root, including S1. Conclusion: Ultrasound-guided injection may be an option for the delivery of injectate into the S1 nerve root, as well as lumbar nerve root area.

• 핵의학기술
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• 제19권1호
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• pp.3-11
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• 2015

기존 감마카메라에 장착된 핀홀 콜리메이터 4 mm 초점을 이용하여 24시간 지연검사에는 슬관절, 악관절 연조직 계수치가 작아 높은 질영상을 얻기에는 매우 어려운 부분이 있다. 대부분 고분해능 영상 획득시 4 mm 직경의 초점만을 이용한 검사를 시행해 왔다. 기존 감마카메라를 이용하여 Micro deluxe phantom의 고분해능 핀홀 콜리메이터 SPECT을 비교 평가해 보았다. 본 연구에서는 각 초점 직경의 비교 평가와 24시간 지연검사 유용성을 평가해 보았다. 선 선원을 이용하여 6 mm, 8 mm 직경 초점을 핀홀 콜리메이터에 장착하고 각 초점의 분해능을 평가해 보았으며 Micro deluxe phantom을 고선량 및 저선량으로 혼합하여 SPECT 영상을 획득하여 OSEM 알고리즘을 이용한 프로그램으로 영상을 재구성 및 분해능 평가를 하였다. 임상영상은 염증질환이 있는 슬관절과 악관절의 3시간, 24시간 지연영상을 획득하여 관심영역과 주변부를 150 mm로 설정하여 신호대 잡음비, 대조도, 균일도를 비교 및 분석하였다. 슬관절 24시간 지연영상에서 신호대 잡음비, 대조도, 균일도가 향상되었으나 악관절에서는 신호대 잡음비, 균일도는 저하 되었고 대조도는 현저히 감소됨을 알수 있었다. 6 mm, 8 mm 초점을 이용한 핀홀 콜리메이터는 24시간 지연영상에서 좀더 나은 정보를 얻을수 있으며 슬관절뿐만 아니라 연조직이 많이 포함된 고관절, 천장관절에서 충분히 질적인 임상영상을 얻을 수 있다고 사료된다.

• Computers and Concrete
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• 제21권3호
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• pp.335-344
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• 2018

More and more special-shaped structural systems have been widely used in various industrial and civil buildings in order to satisfy the new structural system and the increasing demand for architectural beauty. With the popularity of the special-shaped structure system, its seismic performance and damage form have also attracted extensive attention. In the current research, an experimental analysis of six groups of (2/3 scale) T-shaped column joints was conducted to investigate the seismic performance of T-shaped column joints. Effects of the beam cross section, transverse stirrup ratio and axial compression ratio on bearing capacity and energy dissipation capacity of column joints were obtained. The crack pattern of T-shaped column joints under low cyclic load was presented and showed a reversed "K" mode. According to the crack configurations, a tensile-shear failure model to determine the shear bearing capacity and crack propagation mechanisms is developed.

• 대한관절경학회지
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• 제5권1호
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• pp.45-48
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• 2001

내측 반월상연골의 전각부는 경골의 전면에 부착되어 있으며 횡인대에 의하여 외측 반월상연골 전각부와 연결되어 있다. 후각부는 후방 십자 인대 경골부착부 바로 전방에 견고하게 부착되어 있다. 관절경 검사상 반월상연골의 후각부가 경골의 정상적인 부위에 부착되어 종지되지 않고 전각부 하방까지 부착부위가 연장되는 반월상연골이 관찰되어 저자들은 이와같은 비정상적인 내측 반월상연골 1례 를 문헌고찰과 함께 보고하는 바이다.

• 콘크리트학회논문집
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• 제15권4호
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• pp.625-633
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• 2003

For the construction of open-topped steel box girder bridges, prefabricated concrete slab could offer several advantages over cast-in-situ deck including good quality control, fast construction, and elimination of the formwork for concrete slab casting. However, precast decks without reinforcements at transverse joints between precast slabs should be designed to prevent the initiation of cracking at the joints, because the performance of the joint is especially crucial for the integrity of a structural system. Several prestressing methods are available to introduce proper compression at the joints, such as internal tendons, external tendons and support lowering after shear connection. In this paper, experimental results from a continuous composite bridge model with precast decks are presented. Internal tendons and external tendons were used to prevent cracking at the joints. Judging from the tests, precast decks in negative moment regions have the whole contribution to the flexural stiffness of composite section under service loads if appropriate prestressing is introduced. The validity of the calculation of a cracking load fur serviceability was presented by comparing an observed cracking load and the calculated value. Flexural behavior of the continuous composite beam with external prestressing before and after cracking was discussed by using the deflection and strain data.