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모서리가 둥근 직육면체 중공볼을 가지는 2방향 중공슬래브의 효율적인 진동해석
박현재, 김민균, 이동근, 박용구, 김현수, Park. Hyun-Jae, Kim. Min-Gyun, Lee. Dong-Guen, Park. Yong-Koo, Kim. Hyun-Su 한국전산구조공학회 한국전산구조공학회논문집 8 Pages
한국전산구조공학회 한국전산구조공학회논문집 2009, Vol.22 No.5 421-428 (8 pages)
본 연구에서는 2방향 중공슬래브의 효율적인 진동해석을 위하여 등가의 플레이트 모델을 개발하였다. 이를 위하여 3차원 입체요소 중공슬래브 모델에 대응하는 플레이트 슬래브 모델의 등가 질량과 강성을 산출하였다. 개발된 등가 플레이트 모델의 정확성과 효율성을 검증하기 위하여 예제해석을 수행하였다. 해석결과 등가 플레이트모델의 고유진동수는 3차원 입체요소모델과 비교하여 매우 정확한 것을 확인하였다. 또한 보행하중이 가해지는 2방향 중공슬래브에 대해 등가플레이트 모델과 3차원 입체요소 모델을 사용하여... -
진동실험을 통한 슬래브구조물의 사용성 평가
Kim. Dongbaek, Ryu. Gichan 한국재난정보학회 한국재난정보학회논문집 7 Pages
한국재난정보학회 한국재난정보학회논문집 2014, Vol.10 No.2 312-318 (7 pages)
최근의 건축구조물은 대형화되어 가고, 경량화와 유연화에 따라 진동에 의한 사용성 문제가 제기되고 있다. 일반적으로 RC슬래브의 경우 강성이 우수하여 진동에 대해 비교적 사용성이 우수한 것으로 알려져 있으나, 최근에 시공되고 있는 초고층 아파트의 경우 슬래브가 경량화 되어가고 장스팬을 갖게 되어 이에 대한 사용성의 검토가 요구되고 있는 실정이다. 본 연구에서는 기초적인 연구로 RC슬래브에 대하여 진동에 의한 사용성을 검토하여 보았다. 실험에 사용된 구조물은 충남 천안에 위치한 지하1층 지상5층 규모의 구조물이며... -
Comparison of the thickness of the gastrocnemius through ultrasonography during heel-drop exercise performance
Dan-Bee Gal, Su-Young Lee 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2016, 제 5권 제 2호 6 89-94 (6 pages)
Objective: This study was aimed to compare the thickness and pennation angle of gastrocnemius through ultrasonography during the heel-drop exercise on ankle dorsiflexion angle. Design: Cross-sectional study. Methods: Nineteen normal adults in their 20s had voluntarily participated in this study. All subjects performed the ankle heel-drop exercise with ankle dorsiflexed to 0°, 10°, and 20°: heel-drop exercise with ankle dorsiflexed to 0° was executed on floor-level, heel-drop exercise with... -
The effects of increased unilateral and bilateral calcaneal eversion on pelvic and trunk alignment in standing position
Jae-hoon Yi 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2016, 제 5권 제 2호 5 84-88 (5 pages)
Objective: Generally, it is known that there is a correlation between excessive calcaneus eversion and a patient with low back pain and it also affects pelvic alignment. However, there are not enough studies that show calcaneal eversion having an effect on the alignment of the trunk. Design: Cross-sectional study. Methods: A 3-dimensional motion analysis system was used to assess the lower limbs, pelvic alignment, and trunk alignment with increased unilateral and bilateral calcaneal eversion in... -
Relationship between anticipatory postural adjustment of the trunk, dual tasks and physical performance with chronic stroke survivors
Won Jeong Hwang, Min Kwon Cho, Yi-jung Chung 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2015, 제 4권 제 1호 8 44-48 (5 pages)
Objective: The purpose of this study was to investigate the relationship between anticipatory postural adjustment (APA), single task, dual tasks and physical performances. The trunk muscles of APA consist of bilateral erector spinae (ES) and bilateral internal oblique (IO) adnominal muscles, during rapid stepping with the affected or unaffected leg in a sitting posture. Design: Cross-sectional study. Methods: In patients with chronic stroke, electrodes of surface electromyography (EMG) were... -
Ultrasound imaging for age-related differences of lower extremity muscle architecture
Min Kyu Kim, Young Jun Ko, Hwang Jae Lee, Hyun Geun Ha, Wan Hee Lee 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2015, 제 4권 제 1호 7 38-43 (6 pages)
Objective: To investigate and compare the size of the rectus femoris (RF), tibialis anterior (TA), and medial gastrocnemius (GMM) using ultrasound (US) imaging in young, elderly, and very elderly groups. Design: Cross sectional study. Methods: This study consisted of 25 young (age 20 years), 24 elderly (age 65-74 years), and 25 very elderly (age 75-90 years) people with no physical dysfunctions. The cross sectional area (CSAs) of the RF and muscle thickness of the TA and GMM were measured at... -
The changes of rectus abdominis muscle thickness according to the angle during active straight leg raise
Hwang Jae Lee, Kil Ho Shin, Sung Mi Byun, Hyeon Seo Jeong, Ji Su Hong, Su Ji Jeong, Wan Hee Lee 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2013, 제 2권 제 1호 8 44-48 (5 pages)
Objective: The purpose of this study was to investigate changes of abdominal muscles thickness according to the angle during the active straight leg raise (ASLR) in young healthy subjects. Design: Cross sectional study. Methods: Twenty-three healthy university students (13 men and 10 women) voluntary participated to the study in S University. The ASLR was performed with the subject lying supine with lower extremities straight on a standard plinth, hands resting on the chest, and elbows on the... -
Effects of Ovarian Cycle on Hemodynamic Responses during Dynamic Exercise in Sedentary Women
Hyun-MinChoi, CharlesL.Stebbins, HosungNho, Mi-SongKim, Myoung-JeiChang, Jong-KyungKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 6 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.6 4 499-504 (6 pages)
This study tested the hypothesis that effects of the menstrual cycle on resting blood pressure carry over to dynamic exercise. Eleven healthy females were studied during the early (EP; low estrogen, low progesterone) and late follicular (LP; high estrogen, low progesterone) menstrual phases. Stroke volume (SV), heart rate (HR), cardiac output (CO), systolic blood pressure (SBP), diastolic blood pressure (DBP), and total vascular conductance (TVC) were assessed at rest and in response to mild and...
