어깨 불안정성환자에게 각도에 따른 슬링 운동이 앞톱니근의 근 활성도 변화

박찬희,Park, Chan-hee 대한정형도수물리치료학회 2021 대한정형도수물리치료학회지 Vol.27 No.1

Background: The serratus anterior and upper trapezius muscles act synergistically to allow for an appropriate scapulothoracic rhythm. However, a decrease in serratus anterior activation causes the upper trapezius to become overactivated, resulting in dysfunction. This study compared serratus anterior and upper trapezius muscle activity according to sling angle and compared serratus anterior strength between healthy adults and patients with shoulder instability. Methods: Twenty participants (10 healthy adults and 10 patients with shoulder instability) were included in this study. The participants had their arms extended at sling angles of 30°, 60°, and 90° in reach forward with shoulder flexion using goniometer. Serratus anterior strength was measured three times while the participants were supine. The outcome measures were surface electromyography amplitude of the upper trapezius and serratus anterior and serratus anterior strength. Results: The Wilcoxon signed-rank test indicated that the upper trapezius was significantly different between healthy group and shoulder instability group at a sling angle of 60°, and both the upper trapezius and serratus anterior exhibited significant differences at 90°. Moreover, a significant difference was noted in the muscle strength of the serratus anterior. Conclusion: Our results provide novel and promising clinical evidence that patients with shoulder instability have decreased serratus anterior activation and upper trapezius overactivation, resulting in muscle imbalance. In addition, there was a significant difference between the healthy group and shoulder instability group in the serratus anterior muscle strength

등척성 목 폄 시 만성 목 통증이 있는 환자와 정상인 간의 근육 피로도, 근력 및 지구력 비교

박찬희,Park, Chan-hee 대한정형도수물리치료학회 2021 대한정형도수물리치료학회지 Vol.27 No.2

Background: Chronic neck pain (CNP) is associated with weakness in the deep neck flexor muscles, a shortening of the neck extensors, and a reduction in endurance. In addition, muscle imbalance can lead to neck pain and musculoskeletal dysfunction. This study compared neck extensor muscle fatigue, muscle strength, and muscle endurance time between patients with CNP and healthy adults during isometric neck extension. Methods: Thirty participants (15 patients with CNP and 15 healthy adults) were recruited in this research. The outcome measures included splenius capitis (SC) muscle fatigue, isometric neck extensor strength, and muscle endurance. The independent T-test was used to compare the continuous dependent variables between the CNP group and the healthy group. Results: The independent T-test indicated that muscle fatigue in the left SC differed significantly between the CNP group and the healthy group. A significant difference was also noted in the isometric neck extensor and neck extensor strength between the groups. Conclusion: Our results provided promising clinical evidence that patients with CLP have reduced neck extensor strength and endurance and increased SC muscle fatigue, which results in neck pain.

전방 십자인대 재재건술의 분석

박찬희,송은규,선종근,임지현,강경도,이태민,Park, Chan-Hee,Song, Eun-Kyoo,Seon, Jong-Keun,Yim, Ji-Heoun,Kang, Kyung-Do,Lee, Tae-Min 대한정형외과스포츠의학회 2011 대한정형외과스포츠의학회지 Vol.10 No.2

목적: 전방십자인대 재건술의 수가 증가하면서, 재건술의 실패로 인한 재재건술의 빈도 또한 증가하고 있다. 따라서 저자는 전방십자인대 재건술 후 발생한 이식건 실패의 원인 및 전방십자인대 재재건술 후의 임상적 결과를 분석하였다. 대상 및 방법: 1998년 2월부터 2010년 7월까지 전방십자인대 재건술 실패에 대하여 전방십자인대 재재건술을 시술받은 후 최소 12개월 이상 추시가 가능하였던 36예를 대상으로 하였다. 재건술 후 재재건술까지의 평균기간은 60(5~334)개월이었으며, 처음 전방십자인대 재건술을 시술 시 23예(63.9%)에서 동종 이식건을, 13예(36.1%)에서 자가 이식건을 사용하였다. 전방십자인대 재건술 실패의 주증상으로 불안정성이 가장 많았으며, 전방십자인대 재건술을 한번 시행 받았던 경우가 35예(97.5%), 두 번 시행 받았던 경우가 1예(2.5%)였다. 임상적 결과는 Lysholm 슬관절 점수, Tegner activity 점수를 이용하여 평가하였으며, 안정성은 Lachman 및 pivot shift 검사와 Telos device를 이용하여 평가하였다. 결과: 환자의 평균 추시 기간은 21(12~40)개월이었으며, 전방십자인대 재건술의 실패원인으로는 외상이 19예(52.8%)로 가장 많았고, 대퇴 터널의 부정위치가 13예(36.1%), 경골부 터널의 부정위치가 1예(2.8%), 골융합의 실패 3예(8.4%)로 나타났다. 전방십자인대 재재건술을 시행할 시 34예(94%)에서 동종이식건을, 2예(6%)에서 자가 이식건을 사용하였으며, 21예에서 반월상 연골판 손상이 동반되었다(내측 반월상 연골판 손상 14예, 외측 반월상 연골판 손상 7예). Lysholm 슬관절 점수는 술전 66.5점에서 술후 최종 추시시 92점으로 호전되었다(p<0.01). 환자의 대부분은 수술 결과에 만족(92%)하고 있었다. Tegner activity 점수는 술전 2.0점에서 술후 6.2점으로 호전되었다(p<0.01). Lachman 및 pivot shift 검사에서 33예, 30예가 Gr I 이하로 호전되었으며, Telos device를 이용한 안정성 검사에서는 양측 차이 정도는 술전 평균 15.5 mm에서 술후 최종 추시시 4.5 mm로 의미있게 호전되었다(p<0.01). 환자의 대부분은 수술 결과에 만족(92%)하고 있었다. 결론: 전방십자인대 재 재건술은 1년 이상 추시 결과 약간의 전방 불안정성이 존재하였으나, 임상적 결과 및 환자의 주관적 만족도에 있어서는 우수한 결과를 보였다. Purpose: As the number of the anterior cruciate ligament (ACL) reconstruction has increased, the incidence of revision of ACL reconstruction due to reconstruction failure has been also increased. Therefore, authors analyzed the reason of the failure of ACL reconstruction and the clinical result of the ACL revision. Materials and methods: From February 1998 to July 2010, we selected 36 cases which was followed at least 12months after the ACL reconstruction failure. Duration from reconstruction to revision, the average duration was 60 months (5~334) and on first reconstruction, we used allograft on 23 cases (63.9%) and autograft on 13 cases (36.1%). For the main symptom of ACL reconstruction failure, instability was the most common symptom, and 35 cases (97.5%) were undergone only one reconstruction and 1case (2.5%) was undergone two reconstruction. Clinical results were evaluated by Lysholm knee joint score, pivot shift test, and Telos device. Results: Average follow-up duration of the patients was 21 months (12~40), and the reason for the ACL reconstruction failure, trauma was most common by 19 cases (52.8%), malposition of the femoral tunnel was 13 cases (36.1%), malposition of the tibia tunnel was 1case (2.8%), and failure of osteointegration was 3 cases (8.4%). On performing the ACL revision, we used allograft on 34 cases (94%) and autograft on 2 cases (6%), and 21 cases accompanied injury of the meniscus (medial meniscus 14 cases, lateral meniscus 7 cases). Lysholm knee joint score was improved from 66.5 points, preoperatively to 92 points on last follow-up (p<0.01). In most cases, patients were satisfied (92%) with the operation results. Tegner activity score was also improved from 2.0 points preoperatively to 6.2 points on the last follow-up. On Lachman and pivot sift test, 33 cases and 30 cases were improved to grade I respectively, and on stability test using Telos device, the bilateral difference was improved from mean 15.5 mm preoperatively to 4.5 mm on the last follow-up. Conclusion: After 1 year follow-up, Revision of ACL had a little anterior instability but it showed satisfactory result on clinical result and patient's subjective satisfaction.

유지관리 저감 무도장 교량용내후성강 적용 교량

박찬희(Park, Chan-Hee),성택룡(Seong, Taek-Ryong),안기성(Ahn, Ki-Sung) 대한토목학회 2018 대한토목학회 학술대회 Vol.2018 No.10

EDLC 슈퍼 캐피시터 특성 분석을 위한 양산용 전기화학 분석 장치 개발

박찬희(Park, Chan-Hee),이혜인(Lee, Hye-In),김상중(Kim, Sang-Jung),이정호(Lee Jung-Ho),김성진(Kim, Seong-Jin),이희관(Lee, Hee-Gwan) 한국산학기술학회 2012 한국산학기술학회논문지 Vol.13 No.12

본 논문에서는 기존에 주로 연료전지나 배터리 분석용으로 사용되었던 EIS 장비를 그 적용 범위를 넓혀 차 세대 축전지인 EDLC 슈퍼커패시터까지도 분석할 수 있도록 개발하였다. 시스템은 다양한 패턴을 발생시킬 수 있는 신호 발생기, 정전위기, 수집된 신호처리를 위한 고속 디지털 필터 및 측정 프로그램으로 구성되었다. 개발된 시스템 은 연구실 레벨에 그치지 않고 휴대용이면서 양산용에도 적합한 전기화학 분석 장치이다. 시스템의 특징으로는 0.01 에서 20kHz까지 신호 출력이 가능하며, 동시에 수집된 전류신호는 푸리에변환을 이용하여 빠르게 분석할 수 있다. 장 치를 이용하여 분석한 EDLC의 특성인 복소 저항 임피던스와, 등가이론을 적용한 등가회로 임피던스 데이터를 비교 한 결과, 비슷한 결과를 확인 할 수 있었다. 이 시스템을 사용하면, 슈퍼커패시터의 생산 과정에서 시간에 따라 변하 는 전기화학적 임피던스 변화를 빠른시간에 측정 할 수 있을 것으로 예상된다. In this paper, we developed an electro impedance spectroscopy (EIS) device, which are primarily used for the analysis of fuel cells or batteries, to widen its coverage to the next generation super capacitor EDLC characterization. The developed system was composed of a signal generator that can generate various signal patterns, a potentiostatic generator, and a high speed digital filter for signal processing and measurement program. The developed system is portable, which is not only suitable laboratory use but also for mass production line. The special features of the system include a patterned output signal from 0.01 to 20 kHz, and a fast Fourier transform (FFT) analysis of current signals, both of which are acquired simultaneously. Our tests showed similar results after comparing the analysis from our newly-developed device showing the characteristics of EDLC complex impedance and the analysis from an equivalent impedance which was applied to an equivalent circuit. Now, we can expect a fast inspection time from the application of the present system to the super capacitor production line, based on time-varying changes in electrochemical impedance.

픽토그램 수업지도 방법이 청각장애학생의 안전용어 이해에 미치는 효과

박찬희(Chan-Hee PARK) 한국수산해양교육학회 2016 水産海洋敎育硏究 Vol.28 No.6

학(學)으로서의 골프에 대한 고찰(Ⅰ)

박찬희(Chan Hee Park) 한국체육철학회 2002 움직임의철학 : 한국체육철학회지 Vol.10 No.1

The purpose of this study is identify the basic condition of golf of the learning At this time, Golf study focus on scintific research methods because man and woman are very interested in perfect swing The Golf which is depend on scientific method is only regarded technology, As th physical education is difficult situation in learning development. To solve this problem, Golf Association and Professor who majors in Golf in university try to each others in future. If they organize society of golf, will expect diversification of mode of inquiry and academic development. The university will Change the curriculum and educational purpose which is focus on lesson or Pro leaders train, develop teaching materials course management, club fitting, country club management, golf goods, etc.

P10~P27 통계적 품질경영/품질 선진 기법 : P111. ; 반도체 공정의 품질 특성치 예측을 위한 벌점화 축소추정 기법 기반의 가상 계측 모델

박찬희 ( Chan Hee Park ),김성범 ( Seoung Bum Kim ) 한국품질경영학회 2015 한국품질경영학회 학술대회 Vol.2015 No.1

다양한 운행 환경에 적용 가능한 철도차량 현가장치 고장 진단

박찬희(Chan Hee Park),이준민(Junmin Lee),김수호(Sooho Kim),이동기(Dong-Ki Lee),나규민(Kyumin Na),송주환(Joowhan Song),윤병동(Byeng D. Youn) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12

This research focused on introducing a hybrid method to identify the damper failures on rail vehicle suspensions using some spectral information. The investigated system has been announced at a competition named as 2017 Data Challenge organized by prognostics and health management (PHM) society, and there were three kinds of variations that the failure detection method should consider; (1) payload, (2) speed and, (3) track. Due to the different operating conditions with no failure data of the system, two methods, which could be represented by data-driven and physics based approach, have been aggregated. First, a data-driven approach, targeting the different payload and speed conditions, was introduced which computes root mean square error (RMSE) between training data set and validation data set at all the sensors. Second, the ensemble method, which integrates physical model estimating the system parameters (SPE) and Pearson correlation coefficient (PCC) based approach, was developed for the different track condition. The result from the proposed method was led to the third prize in 2017 Data Challenge. Although the result could be improved if more information of the system is provided, this study could give a general methodology of diagnosing failures in the bogie car suspensions.

특수교육대상자 보호자의 치료지원기관 선택배경요인에 관한 연구

박찬희(Park, Chan-Hee) 학습자중심교과교육학회 2020 학습자중심교과교육연구 Vol.20 No.22

이 연구는 특수교육대상자의 보호자가 선호하는 치료지원기관의 선택배경요인에 대하여 알아보기 위해 설문지를 활용한 조사연구로 수행되었다. 전국의 치료지원기관을 이용하고 있는 특수교육대상자 보호자를 대상으로 2019년 1월부터 7월 28일까지 설문지를 발송하여 전체 390부 중 미기입이나 작성이 완료되지 않은 설문지를 제외하고 적합하게 응답한 최종 264부의 분석을 실시하였다. 연구결과는 다음과 같다. 첫째, 보호자와 아동의 관계에 따른 선택배경요인을 분석한 결과 인적요인에서 유의미한 차이가 나타났다. 둘째, 치료지원기관 선택배경요인 간 우선순위를 비교한 결과 환경적요인의 하위속성 간 우선순위는 ‘주변인의 추천’이 가장 높게 나타났으며, 지원체계요인의 하위속성 간 우선순위는 ‘다양한 진단도구 구비’, 프로그램요인의 하위속성 간 우선순위는 ‘프로그램 실시에 대한 주위평판’, 인적요인의 하위속성 간 우선순위는 ‘치료사의 경력’이 가장 높게 나타났다. 이러한 연구결과를 통해 특수교육대상자 보호자가 치료지원기관을 선택할 때 필요한 구체적인 정보의 제공과 더불어 치료지원기관의 전문성 향상의 질적 성장을 위한 여러 방면에서의 노력이 필요할 것으로 사료된다. This study surveyed guardians of Children with Special Education Needs from January 2019 and analyzed properly responded 264 copies among 390 copies. The research results are as follows. First, human factors showed a significant difference by analyzing preference background factors according to the relationship between guardians and children. According to the result of analyzing background factors by age of guardians, there was a significant difference in environmental factor, program factor, human factor. According to the result of analyzing background factors by academic background of guardians, there was a significant difference in environmental factor, program factor, human factor. Program factor, human factor showed a significant difference as a result of analyzing background factors according to the gender of children. According to the result of analyzing background factors by age of children, there was a significant difference in environmental factor, program factor, human factor. As a result of analyzing background factors based on the experience of medical support agency, there was a significant difference in program factor, human factor. Secondly, according to the result of comparing the order of priority among preference background factors of Therapeutic Support Services, ‘reputation by surrounding people’ was the highest for priority among lower attributes of environmental factor, and ‘being equipped with various diagnosis tool’ for priority among lower attributes of support system factor, ‘reputation by surrounding people on program execution’ for priority among lower attributes of program factor, and ‘work experience of therapist’ for priority among lower attributes of human factor were the highest. To conclude, provision of systematic information when guardians of Children with Special Education Needs select Therapeutic Support Services and efforts in various areas for qualitative development of specialty improvement are needed.