• 대한기계학회논문집A
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• 제27권6호
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• pp.954-959
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• 2003

Colonoscopy is an important medical procedure for the diagnosis of various diseases like cancers in the colon and rectum. But it requires a lot of time for a doctor to acquire dexterous skills necessary to perform successful colonoscopy. Moreover, to many patients, conventional colonoscopy simply takes too long time. Therefore, some studies on the development of autonomous and more convenient colonoscope are carried out. In this Paper, we Propose a functional colonoscope robot system that has a locomotive function with a hollow body, a steering system, and other basic functions of typical conventional colonoscope systems. The concept and each component of the functional colonoscope system are described in this paper. In order to evaluate the functional performance of the colonoscope robot, we carried out in -vitro and in-vivo tests.

• 수면정신생리
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• 제6권2호
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• pp.149-157
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• 1999

정신과 임상에서 편리하게 사용할 수 있는 전산화 신경심리 검사 시스템을 개발하였다. 이 시스템은 뇌의 전반적인 인지 기능과 뇌의 기능적 국재화를 평가할 수 있는 14개의 신경심리 검사로 구성되어 있다. 개발된 시스템은 멀티미디어와 객체 지향 개념에 의해 설계, 구현되었고, 마이크로 소프트 Windows에 기반을 둔 그래픽 인터페이스를 채용하여 운용이 용이하도록 하였다. 또한 마우스와 터치 스크린을 이용하여 피검사자로부터 입력을 손쉽게 받아드릴 수 있도록 하였으며, 색채 단어 검사, 범주 검사, 그리고 언어 기억 검사, 언어 지각 검사 등은 한글화하여 검사의 효율성을 향상시켰다. 개발된 시스템을 뇌손상 환자와 정신과 환자에 적용한 결과 그 인지 장애와 뇌의 기능적 국재화를 평가하는데 유용하게 사용될 수 있었다.

• 한국도로학회논문집
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• 제14권5호
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• pp.21-29
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• 2012

PURPOSES: This study is to investigate the mechanical performance of the fiber reinforced lean concrete with respect to different types of fibers. METHODS: Increased vehicle weight and other causes from the exposed conditions have accelerated the deteriorations of road pavement. A new multi-functional composite pavement system is being developed recently in order to extend service life and upgrade the pavement. A variety of tests were conducted before and after hardening of the concrete. RESULTS: From the test results, it was found that the use of different types of fibers did not affect the compressive strength development. This might be due to the inherent property of the lean concrete. When steel fibers were used relatively greater flexural strength and flexural fracture toughness were developed. Also addition of fly ash by replacing a part of Portland cement the fracture toughness was slightly increased. CONCLUSIONS: It has been known that the addition of fibers and use of mineral admixture can be positively considered in the development of multi-functional composite pavement system as its required mechanical performance is obtained.

• The Journal of Korean Physical Therapy
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• 제22권5호
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• pp.83-93
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• 2010

Purpose: The purpose of this study was to determine the reliability and validity of the Functional Movement Screen (FMS) for assessing Korean athletes. Methods: A total of 48 patients (37 males and 11 females) participated in this study. Data were acquired after translation of the FMS from English to Korean and cross-cultural adaptation of the this questionnaire. To determine inter-rater reliability, the relationship between the FMS scores obtained by two raters was evaluated using the Kappa coefficient, which was in total agreement with the Intra-Correlation Coefficient (ICC3,1). Concurrent validity was examined by correlating the FMS scores with the Oswestry disability index (ODI) scores and Visual analogue scale (VAS) scores. Results: The raters demonstrated excellent agreement on 7 (above 90%) of the 17 test (72.9 to 97.9%) components. Substantial agreement was seen in 11 of the 17 tests. Two components of the In-line lunge and rotatory stability tests demonstrated moderate agreement. It showed good inter-rater reliability: the Kappa coefficients ranged from 0.42 to 0.97. ICC3,1=0.42~0.99 and 0.93 (total FMS score). Cronbach's alpha for FMS was 0.80. It was not correlated with ODI or VAS. Conclusion: The Korean version of the FMS is a reliable instrument for measuring movement patterns of Korean athletes and for making decisions related to interventions for performance enhancement.

• Earthquakes and Structures
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• 제16권6호
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• pp.727-741
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• 2019

A reinforced concrete water tank is a typical functional liquid storage structure and cracks are the greatest threat to the liquid storage structure. Tanks are readily cracked due to seismic activity, thereby leading to the leakage of the stored liquid and a loss of function. In order to study the effect of cracks on liquid storage tanks, self-healing and leakage tests for bending cracks and through cracks in the walls of a reinforced concrete water tank were conducted. Material performance tests were also performed. The self-healing performance of bending cracks in a lentic environment and through cracks in a lotic environment were tested, thereby the self-healing width of bending micro-cracks in the lentic environment in the short term were determined. The through cracks had the capacity for self-healing in the lotic environment was found. The leakage characteristics of the bending cracks and through cracks were tested with the actual water head on the crack. The effects on liquid leakage of the width of bending cracks, the depth of the compression zone, and the acting head were determined. The relationships between the leakage rate and time with the height of the water head were analyzed. Based on the tests, the relationships between the crack characteristics and self-healing as well as the leakage were obtained. Thereby the references for water tank structure design and grading earthquake damage were provided.

• 한국항공우주학회지
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• 제49권7호
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• pp.565-572
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• 2021

본 연구에서는 국방 분야에서 분리장치로 사용되고 있는 파이로 장치 중 장기간 보관된 폭발볼트의 성능 및 노화에 관한 연구를 수행하였다. 연구를 위해 약 10년간 무기체계에 탑재되어 있던 폭발볼트를 확보하였으며, AIAA Standard 및 MIL-STD를 기반으로 성능 및 수명 평가 절차를 수립하였다. 성능 평가를 위해 먼저 비기능 검사를 수행하여 외적인 변화나 고장이 발생하였는지 확인하였으며, 내부 회로 및 구조에 이상이 없는지 회로검사와 X-ray 검사를 수행하였다. 비기능 검사가 통과된 시료에 대해서 작동 확인을 위한 성능 시험을 실시하였다. 성능 시험을 통해 폭발볼트의 분리 여부 및 분리시간을 측정하였으며, 일부 시료의 경우 잔여 수명 및 연장 가능성을 확인하기 위해 고온저장시험 후 성능 시험을 실시하였다. 마지막으로 시험 결과와 아레니우스 모델을 바탕으로 잔여 수명 및 신뢰도를 예측하였으며, 수명에 따른 신뢰도를 확인하였다.

• 한국산업융합학회 논문집
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• 제3권3호
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• pp.251-256
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• 2000

This report analyzes the Source Qualification Test which is composed of main functional and environmental tests for the localizing avionics(electronic subsystem for aircrafts and spacecraft) and high performance mechanical subsystem. Especially the detail test approaches of integrated servo actuators which is the main part to supply the power to the main and other flying control panel. Nowadays this subsystem works with mechanical and electrical engineering technique. In detail, electrical signal is used as input and transferring tool and mechanical part is the output as a power and manufacture the physical dimensions and functions. Finally in this review, the new test procedure to prove the function by the new manufacturer is established.

• 대한정형외과스포츠의학회지
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• 제7권2호
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• pp.95-121
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• 2008

목적: 전방 십자 인대 재건술 후 임상적 결과 판정에 있어 IKDC 주관적 점수의 유용성을 알아보고자 하였다. 대상 및 방법: 전방 십자 인대 재건술을 시행 받은 24명의 환자를 대상으로 하였으며 이 중 12명은 자가 슬괵건, 12명은 아킬레스 동종건을 이용하였다. 주관적 평가 항목은 Lysholm 점수, IKDC 주관적 점수, Knee Outcome Survey (KOS) 점수 및 Tegner 활동도를 이용하였고, 정적 불안정 검사, Biodex 근력 평가 검사, 외발 뛰기 검사 등을 객관적 판정 검사로 시행하였다. 환자의 최종 결과 판정을 위해 Carioca test, Shuttle run test 및 Co-contraction test 등의 삼종 기능성 수행 검사를 시행하였고 각각의 검사 항목을 기능성 수행 검사와 비교하여 상관 관계를 도출하였다. 결과: IKDC 주관적 점수, 외발 뛰기 검사 중 한번 뛰기 및 저속에서의 대퇴 사두근의 근력 검사에서 기능성 수행 검사와 유의한 상관 관계를 보였다. 결론: IKDC 주관적 점수는 전방 십자 인대 재건술 후 주관적 결과 판정 뿐만 아니라 기능적 상태를 알 수 있는 유용한 검사로 사료된다.

• PNF and Movement
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• 제8권1호
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• pp.67-77
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• 2010

Purpose : The purpose of this study was to investigate the usefulness of clinical balance tests through the correlation of balance evaluation using by forceplate in elderly. Methods : Thirty nine healthy elderly subjects (14 males, 25 females) participated in the study. The subjects were evaluated with clinical balance tests [(Berg balance scale (BBS), Functional reach test (FRT), Tinetti's performance oriented mobility assessment (POMA), and one leg standing (OLS)]. Static balance evaluation was assessed by using forceplate. Center of pressure (COP) parameters were obtained using it as total path distance, total sway area, X mean frequency and Y mean frequency for 20 seconds in the following conditions: (1) comfortable standing with eyes opened and closed, (2) uncomfortable standing with eyes opened and closed. After static balance evaluation tested, dynamic balance evaluation was assessed. COP parameters were error distance and area during sine curve trace. COP parameters were movement time, error distance, and maintained time in the circle during COP movement task. Results : Clinical balance tests showed statistically significant correlation between static and dynamic balance evaluations. Among the clinical balance tests, the BBS, POMA, and OLS showed significant correlation with to assess the balance ability of elderly in clinical setting both evaluations. Conclusion : Clinical balance tests can be recommended in clinical setting because of low costs and simplicity.

• 한국산업융합학회 논문집
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• 제4권2호
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• pp.119-125
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• 2001

This paper discuss the Qualification Test Procedure which is composed of main functional and environmental tests for the localizing avionics and subsystems, especially the detail test approaches of General Avionics Computed(GAC) through the analysis of related technical data packages for the purpose of performance proof of final products. Quality assurance procedures are properly established with the several kinds of inspections and functional test items. They are called as process inspections, functional test, acceptance test procedure and qualification test procedure. The Qualification test procedure are composed of the analysis of original engineering design concept and shall be performed for the acquisition of the certification of the GAC's quality as well as the aquisition of the related techniques and engineering know-how items.