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Contact finite element method for dynamic meshing characteristics analysis of continuous engaged gear drives
Wu. Yong-Jun, Wang. Jian-Jun, Han. Qin-Kai 대한기계학회 Journal of mechanical science and technology 15 Pages
대한기계학회 Journal of mechanical science and technology 2012, Vol.26 No.6 1671-1685 (15 pages)
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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)
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 moderate cycling exercise during EP and LP. During EP, compared to LP, baseline SBP (111±1 vs. 103±2... -
Effects of Self-stretching with Mobilization on Hip Range of Motion in Individuals with Hip Internal Rotation Deficits
Dong-Kyu Lee, In-Joon Uh 한국임상움직임치료학회 한국임상움직임치료학회지 9 Pages
한국임상움직임치료학회 한국임상움직임치료학회지 2021, 제 1권 제 1호 6 45-53 (9 pages)
Background : Both stretching and joint mobilization are effective for hip internal range of motion (ROM) recovery. In particular, stretching of the hip external rotators and posterior/lateral glide mobilization are used to improve hip internal rotation (IR) ROM. However, no study has examined the effects of simultaneous stretching and joint mobilization. Objectives : The purpose of this study was to investigate the effects of stretching with mobilization (SWM) on hip IR ROM and flexion abduction... -
Acute effect of self-myofascial release using a foam roller on the plantar fascia on hamstring and lumbar spine superficial back line flexibility
Kwang-sun Do, Jae-eun Kim, Jong-eun Yim 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2018, 제 7권 제 1호 7 35-40 (6 pages)
foam roller on hamstring and lumbar spine superficial back line (SBL). Design: Randomized controlled trial. Methods: Thirty-one healthy adults agreed to the method and purpose of the study. Selection and exclusion criteria were screened, and baseline measurements for the Toe Touch test and passive straight leg raise (PSLR) test were obtained. The participants were then randomly assigned to the SMR group or the sham group. After group assignment, the SMR group rolled the surface of the foot from... -
The passive stretching, massage, and muscle energy technique effects on range of motion, strength, and pressure pain threshold in musculoskeletal neck pain of young adults
Hye Mi Jeong, Jae-Hoon Shim, Hye Rim Suh 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2017, 제 6권 제 4호 7 196-201 (6 pages)
Objective: Musculoskeletal neck pain have many symptoms which include decreased range of motion (ROM) and muscle strength, and increased pain. However, the management methods are controversial. The purpose of this study was to examine the effects of three interventions on ROM, strength, and pressure pain threshold (PPT) with musculoskeletal neck pain. Design: Pretest-posttest design. Methods: Thirty subjects participated in this experiment. They were randomly assigned to thefollowing groups:... -
The effect of hip joint strengthening exercise using proprioceptive neuromuscular facilitation on balance, sit to stand and walking ability in a person with traumatic brain injury
Du Kyo Jung, Yi-jung Chung 물리치료재활과학회 Physical Therapy Rehabilitation Science 9 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2017, 제 6권 제 2호 8 96-104 (9 pages)
the hip extensor muscles in order to solve the patient’s physical function and body structure. From the 2nd and 4th week, we improved the motivation through the task-oriented method, and then weight-bearing training of the right lower extremity was proceeded by kicking a soccor ball with the left lower extremity. The exercises were performed for 4 weeks, 5 days a week, for 60 minutes with the exercise intensity gradually increased according to the subject’s physical abilities. Results: As a... -
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 strengthening exercise, stretching and meditation on electromyography onset timing of the rectus femoris and gastrocnemius during vertical jump performance in healthy adults
Ji Young Eum, Yeoung Kyun Kim, Eun Ji Park, Ju Hee Lee, Ji Eun Lee, Jin Ju Lim, Man Ho Choi, Hyun Hee Kim 물리치료재활과학회 Physical Therapy Rehabilitation Science 6 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2015, 제 4권 제 1호 4 22-27 (6 pages)
Objective: Jump training helps increase the muscle power by improving the muscle strength and reaction time of the muscle in operation. The purpose of this study was to identify the effects of strengthening, stretching exercise and meditation on electromyographic (EMG) onset timing of rectus femoris and gastrocnemius muscle during vertical jump performance. Design: Cross-sectional study. Methods: Ten healthy adults (5 male and 5 female) who were familiar with the vertical jumping task and had no... -
Immediate effects of a neurodynamic sciatic nerve sliding technique on hamstring flexibility and postural balance in healthy adults
Jae-myoung Park, Jae-yun Cha, Hyun-jin Kim, Yasuyoshi Asakawa 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2014, 제 3권 제 1호 7 38-42 (5 pages)
Objective: In this study, we applied a neurodynamic sciatic nerve sliding technique to healthy adults to elucidate its effects on hamstring flexibility and postural balance. Design: Cross-sectional study. Methods: This study targeted twenty four healthy adults (16 men, 8 women). A neurodynamic sciatic nerve sliding technique was applied 5 times to all subjects’ dominant leg. The subjects were asked to sit on the bed while performing cervical and thoracic flexion, as well as knee flexion with... -
Effect of low intensity pulsed ultrasound in activating the mitogen-activated protein kinase signaling pathway and inhibition inflammation cytokine synthesis in chondrocytes
Eun-Jung Kim, Gye-Yeop Kim 물리치료재활과학회 Physical Therapy Rehabilitation Science 5 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2014, 제 3권 제 1호 6 33-37 (5 pages)
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A pilot study of augmented reality-based postural control training in stroke rehabilitation
Yu Hyung Park, Chi Ho Lee, Hang Jin Kim 물리치료재활과학회 Physical Therapy Rehabilitation Science 7 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2014, 제 3권 제 1호 3 13-19 (7 pages)
variable. In addition, the ARPC group showed significantly greater improvement than the control group in the 10MWT (p<0.05), whereas no significant difference was observed between the groups for the BBS. Conclusions: The results of this study confirmed the benefits of ARPC training on dynamic balance and functional gait ability. Additionally, this study may provide evidence supporting the use of an ARPC training program for improving balance and gait ability in patients after a chronic stroke. -
Effects of sling exercise and McKenzie exercise program on neck disability, pain, muscle strength and range of motion in chronic neck pain
Seung-Cheol Seo, Jin-Young Choi, Min-Young Joo, Je-Hoon Kim, Seul-Ki Chang 물리치료재활과학회 Physical Therapy Rehabilitation Science 9 Pages
물리치료재활과학회 Physical Therapy Rehabilitation Science 2012, 제 1권 제 1호 8 40-48 (9 pages)
Objective: The aim of this study was to compare sling exercise group to McKenzie exercise group in patients with chronic neck pain. Design: Two group pretest-posttest design. Methods: Twenty subjects who have chronic neck pain were randomly divided into sling exercise group (n=10) and McKenzie exercise (n=10). Sling exercise group (n=10) received sling exercise for 30 minutes per day, twice a week over a 4 week period. And the other group were exercised McKenzie exercise (n=8) for 30 minutes per... -
Effects of chelated Zn/Cu/Mn on redox status, immune responses and hoof health in lactating Holstein cows
Xue-Jun Zhao, Zhong-Peng Li, Jun-Hong Wang, Xiang-Ming Xing, Zhen-Yong Wang, Lin Wang, Zhong-Hua Wang 대한수의학회 Journal of Veterinary Science 8 Pages
대한수의학회 Journal of Veterinary Science 2015, 제 16권 제 4호 7 439-446 (8 pages)
To evaluate the effects of chelated Zn/Cu/Mn on redox status, immune responses and hoof health in lactating Holstein cows, 48 head in early lactation were divided into healthy or lame groups according to their gait score. Cows were fed the same amount of Zn/Cu/Mn as sulfate salts or in chelated forms for 180 days, and foot-and-mouth disease (FMD) vaccine was injected at day 90. The results showed that lame cows had lower antioxidant function, serum Zn/Mn levels, hair Cu levels, and hoof... -
Biceps femoris muscle transposition for treatment of cranial cruciate ligament rupture in small breed dogs
Roberto Tamburro*, Stefania Pinna, Anna Maria Tribuiani, Alessandra Panacea, Fabio Carli, Antonio Venturini 대한수의학회 Journal of Veterinary Science 6 Pages
대한수의학회 Journal of Veterinary Science 2012, 제 13권 제 1호 13 93-98 (6 pages)
The purpose of this study was to evaluate a new extracapsular surgical technique for the treatment of cranial cruciate ligament rupture in small breed dogs. Nine small breed dogs (seven females and two males) weighing ≤ 15 kg were treated with biceps femoris muscle transposition (BFT). The duration of the BFT procedure was 20 min. Each patient underwent a standard clinical protocol and a questionnaire for the owners. Follow-up (at 1, 3, and 12 months postoperative) confirmed significant... -
暴力媒體에 의한 非行行動의 構造模型開發
김헌수, 김현실 대한신경정신의학회 신경정신의학 16 Pages
대한신경정신의학회 신경정신의학 1998, 제 37권 제 3호 6 467-482 (16 pages)
연구목적：청소년의 비행행동을 설명, 예측하기 위하여 복합연합이론(differential association theory), 사회학 습이론(social learning theory) 및 문제행동이론(problem behavior theory)을 근거로 폭력매체와 비행행동 간의 관계를 설명해주는 가설적 모형을 제시하고 이를 검정하여 수정모형을 구축한 후 비행행동에 영향을 미치는 제변수들의 효과를 검정하였다. 방 법：표본추출방법은 지역(서울-지방) 및 조사기관의 유형(중학교, 고등학교, 소년원, 분류심사원)을 함께 고려한 비례층화표본추출법을 적용하였으며 총연구대상자는... -
Children with Disability and Communicational Development Support through Dousa-hou
KUMAR Surender, CHO Joohee, Oh Kunseok 아시아장애사회학회 아시아장애사회학연구 10 Pages
아시아장애사회학회 아시아장애사회학연구 2014, 제 13권 1 1-10 (10 pages)
The results of Questionnaire for Developmental Changes showed that the psychological rehabilitation method Dousa-hou could support and promote most the body posture and communication related factors as volunteer body movements, behavior control, health maintenance, emotion expression, initiative & appearance, speech and communication, and social interaction factors by the practice of Dousa- hou training in 3-days long camps in Malaysian context. -
시뮬레이션 해석을 통한 형상 별 자전거 폐달의 내구성 연구
이정호, 조재웅 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 8 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2016, 제 6권 제 5호 45 463-470 (8 pages)
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자동차 디스크 브레이크의 종류 별 내구성 해석
이정호, 조재웅 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 10 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2015, 제 5권 제 6호 54 565-574 (10 pages)
제동장치로 현재 디스크 브레이크가 보편적으로 사용되고 있으며, 자동차의 운동에너지를 단시간 에 열에너지로 전환하여 자동차를 감속 또는 정지시킨다. 그러나 미끄럼마찰에 의한 높은 온도와 압 력하의 상당히 가혹한 환경에서 작동되기 때문에 튼튼한 내구성을 갖는 것이 필수적이다. 본 연구에 서는 시중에 판매되고 있는 고정 및 부동 캘리퍼 형에 따른 세 가지 형상의 디스크 브레이크들을 모 델링하여 ANSYS 유한요소 해석 프로그램으로서 구조 및 열 해석을 수행하였고, 그 해석 결과들을 종합하여 비교한다. 단순히 제동력만을... -
차량 모노코크 바디 프레임의 모델에 따른 내구성 연구
이정호, 조재웅 인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 11 Pages
인문사회과학기술융합학회 예술인문사회융합멀티미디어논문지 2015, 제 5권 제 5호 49 486-496 (11 pages)
요즘 자동차의 증가로 인해 자동차 사고가 급격히 발생하게 되어 차체의 손상 및 고장이 자주 일 어난다. 이에 따라 본 논문에서는 자동차의 골격으로서의 프레임들 중의 하나인 모노코크 바디에 대 하여 연구를 수행하였다. 일자형과 X자형 크로스 멤버 모노코크 바디 프레임 모델들에 대하여 구조 해석 및 피로 해석을 수행하였다. 각 모노코크 바디 프레임 모델의 변형량과 응력의 발생량 및 분포, 그리고 피로 수명과 피로 손상 정도를 예상 및 비교함으로써 내구성이 있는 모노코크 바디 프레임 설계를 할 수 있다. X자형 모노코크... -
Diagnosis and Characterization of Middle-ear and Cochlear Functions
Rong Z. Gan 한국청각언어재활학회 Audiology and Speech Research 18 Pages
한국청각언어재활학회 Audiology and Speech Research 2013, 제 9권 제 2호 1 95-112 (18 pages)
Hearing impairment is one of the most common physical disabilities in the world. Conductive hearing loss results from dysfunction of the middle ear, and sensorineural hearing loss results from abnormalities within the cochlea or central nervous system. To improve the diagnosis of hearing loss and develop new technologies for restoration of hearing, changes of the middle ear and cochlear functions in relation to ear structural disorders in hearing impaired ears need to be characterized. This... -
Comparative numerical evaluation for the low velocity impact behavior of T300 and T800 composite system
Jae-Seok Choi, Heung Soap Choi, Soo-Jin Park, Myung Kyun Park 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 9 89-95 (7 pages)
and high rigidity [1]. In particular, the fuselage and wings of various aircraft, as well as the load bearing structures and components of mechanical and civil engineering systems are currently being manufactured with CFRP. However, even a low velocity impact on the carbon fiber reinforced composites can cause considerable damage, including matrix cracking, fiber failure and delamination [2-6]. These damages can result in the dramatic loss of strength and stiffness of the composites [7-9]. -
Effect of fiber-matrix adhesion on the fracture behavior of a carbon fiber reinforced thermoplastic-modified epoxy matrix
H.J. Carrillo-Escalante, A. ?lvarez-Castillo, A. Valadez-Gonz?lez, P. J. Herrera-Franco 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 6 47-56 (10 pages)
In this study, the fracture behavior of a thermoplastic-modified epoxy resin reinforced with continuous carbon fibers for two levels of fiber-matrix adhesion was performed. A carbon fiber with commercial sizing was used and also treated with a known silane, (3-glycidoxy propyl trimethoxysilane) coupling agent. Toughness was determined using the double cantilever test, together with surface analysis after failure using scanning electron microscope. The presence of polysulfone particles improved... -
Phenylethynyl-terminated polyimide, exfoliated graphite nanoplatelets, and the composites: an overview
Donghwan Cho, Lawrence T. Drzal 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 1 1-11 (11 pages)
well as the dynamic mechanical properties of carbon/BMI composites, are discussed. Reports on the thermal expansion behavior of intercalated graphite flake, and the effects of exfoliated graphite nanoplatelets (xGnP) on the properties of PETI-5 matrix composites are also reviewed. The dynamic mechanical and thermal properties and the electrical resistivity of xGnP/PETI-5 composites are characterized. The effect of liquid rubber amine-terminated poly(butadiene-co-acrylonitrile) (ATBN)-coated xGnP... -
Flexural properties, interlaminar shear strength and morphology of phenolic matrix composites reinforced with xGnP-coated carbon fibers
Jong Kyoo Park, Jae Yeol Lee, Lawrence T. Drzal, Donghwan Cho 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 5 33-38 (6 pages)
by a direct coating method. The flexural properties, interlaminar shear strength, and the morphology of the xGnP-coated carbon fiber/phenolic matrix composites were investigated in terms of their longitudinal flexural strength and modulus, interlaminar shear strength, and by optical and scanning electron microscopic observations. The results were compared with a phenolic matrix composite counterpart prepared without xGnP. The flexural properties and interlaminar shear strength of the xGnP-coated... -
The effects of stacking sequence on the penetration-resistant behaviors of T800 carbon fiber composite plates under low-velocity impact loading
Furqan Ahmad, Jung-Wuk Hong, Heung Soap Choi, Soo-Jin Park, Myung Kyun Park 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 6 107-115 (9 pages)
Impact damages induced by a low-velocity impact load on carbon fiber reinforced polymer (CFRP) composite plates fabricated with various stacking sequences were studied experimentally. The impact responses of the CFRP composite plates were significantly affected by the laminate stacking sequences. Three types of specimens, specifically quasi-isotropic, unidirectional, and cross-ply, were tested by a constant impact carrying the same impact energy level. An impact load of 3.44 kg, corresponding to... -
Preparation and characterization of carbon fiber-reinforced thermosetting composites: a review
Fan-Long Jin, Soo-Jin Park 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 1 67-77 (11 pages)
Carbon fibers (CFs) have a unique combination of properties which allow them to be widely used as reinforcing materials in advanced polymer composites. The mechanical properties of CF-reinforced polymer composites are governed mainly by the quality of interfacial adhesion between the CFs and the polymer matrix. Surface treatments of CFs are generally carried out to introduce chemical functional groups on the fiber surfaces, which provide the ability to control the surface characteristics of CFs.... -
Properties of multi-walled carbon nanotube reinforced epoxy composites fabricated by using sonication and shear mixing
Min Ye Koo, Hon Chung Shin, Won-Seok Kim and Gyo Woo Lee 한국탄소학회 Carbon Letters 7 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.4 4 255-261 (7 pages)
Multi-walled carbon nanotube reinforced epoxy composites were fabricated using shear mixing and sonication. The mechanical, viscoelastic, thermal, and electrical properties of the fabricated specimens were measured and evaluated. From the images and the results of the measurements of tensile strengths, the specimens having 0.6 wt% nanotube content showed better dispersion and higher strength than those of the other specimens. The Young’s moduli of the specimens increased as the nanotube filler... -
Modifications of mechanical, thermal, and electrical characteristics of epoxy through dispersion of multi-walled carbon nanotubes in supercritical carbon dioxide
MGH ZAIDI, Sanjeev Joshi, Manoj Kumar, Deepak Sharma, Ashwin Kumar, Sarfaraz Alam, Prakash Sah 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2013, Vol.14 No.4 4 218-227 (10 pages)
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청각 의존 컴퓨터 작업이 시각장애인의 경견부 근피로도, 압통 역치에 미치는 영향
진창원, 이석민 한국시각장애교육재활학회 시각장애연구 21 Pages
한국시각장애교육재활학회 시각장애연구 2011, 제 27권 2호 3 41-61 (21 pages)
이 연구의 목적은 청각 의존 컴퓨터 작업에 따른 청각적 스트레스가 시각장애인의 경견부 근피로도, 압통 역치 그리고 주관적 피로도에 미치는 영향을 분석하는 것이었다. 연구 대상자는 서울특별시 소재한 시각장애특수학교의 장애등급 제1, 2급 시각장애인 51명이었고, 청각 정보를 들을 때 사용하는 도구의 형태에 따라 연구 대상을 세 집단으로 나누어, 한 시간 동안의 컴퓨터 작업 전후 근피로도, 압통 역치, 주관적 피로도를 검사하였고 수집된 자료를 통계 분석하였다. 이 연구의 결과, 시각장애인 컴퓨터 작업자들은 VDT... -
온도와 물성의 불확실성을 고려한 고무 마운트의 동특성 해석
이두호, 황인성, Lee. Doo-Ho, Hwang. In-Sung 한국전산구조공학회 한국전산구조공학회논문집 7 Pages
한국전산구조공학회 한국전산구조공학회논문집 2011, Vol.24 No.4 383-389 (7 pages)
본 논문에서는 통계적인 방법을 이용하여 점탄성 제진재인 합성고무의 물성에 대한 변동성을 평가하는 방법을 제안하고 측정데이터를 이용하여 합성고무에 대한 평가를 수행하고 합성고무로 이루어진 고무 마운트에 대한 동특성 해석을 수행하였다. 고무 물성의 불확실성 인자로는 외기 온도의 변화와 실험 데이터의 오차 및 점탄성 물질모델의 오차를 고려하였다. 고무는 분수차 미분모델로 표현되었고, 온도의 영향은 비선형 이동계수모델을 도입하여 복소계수로 나타내어 동강성과 감쇠를 표현하였다. 이러한 물성모델을 바탕으로... -
유한요소법을 이용한 고무 연결요소의 정-동강성 계수에 관한 연구
박노길, 박성태 한국전산구조공학회 전산 구조 공학 11 Pages
한국전산구조공학회 전산 구조 공학 1995, Vol.8 No.2 103-113 (11 pages)
고무 재질로 이루어진 차량 구조물의 연결요소에 대한 등가 강성계수는 차량 시스템 동역학 특성에 매우 민감하게 영향을 주므로 이에 대한 신뢰성있는 해석이 요구된다. 본 논문에서는, 고무의 역학 모델을 정하중 하에서는 유한 변형 및 Hook 모델로 그리고 동하중 하에서는 Voigt 모델로 가정하여, 연결요소의 등가 정-동강성계수를 유한요소법으로 해석하고자 한다. 실제 차량에 사용되고 있는 동일 모양의 방진고무들을 실험 평가한 결과 강성계수값들의 분산 정도가 심함을 알 수 있었다. 유한요소 해석에 필요한 고무 재질의... -
유한요소법에 의한엔진 구조소음 해석
안상호, 김주연, 김규철 한국자동차공학회 한국자동차공학회논문집 12 Pages
한국자동차공학회 한국자동차공학회논문집 1998, Vol.6 No.1 122-133 (12 pages)
