• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 춘계학술대회
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• pp.54-59
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• 2004

In this paper probabilistic fracture mechanics(PFM) approach is employed to evaluate the integrity of CANDU Zr-2.5Nb pressure tubes. Modified failure assessment diagram(Jr-FAD), plastic collapse, and critical crack length(CCL) approach are used for evaluating failure probability of the tubes. Jr-FAD was extended from the Kr-FAD because fracture of pressure tubes occurs in brittle manner due to hydrogen embrittlement of material by deuterium fluence. For developing the probabilistic integrity evaluation module, AECL procedures and fracture toughness parameters of EPRI were used.

• 한국해양공학회지
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• 제15권1호
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• pp.85-91
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• 2001

A study for the structural strength analysis on the doubler plate subjected biaxial in-plane compression and shear load has been performed through the systematic evaluation process. In order to estimate the proper static strength of the doubler plate, non-linear elasto-plastic analysis is introduced. Gap element modeling for contact effect between the main plate and the doubler is prepared and nonlinear analysis procedures are illustrated based on MSC/N4W. In addition, some design guides are suggested through the consideration of several important effects such as corrosion of main plate, doubler width, doubler length and doubler thickness. Finally, theses result are compared with a developed design formula based on the buckling strength and general trends. The design guides, according to the variation of design parameters are discussed.

• Asian Pacific Journal of Cancer Prevention
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• 제17권9호
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• pp.4313-4318
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• 2016

Background: This study documented the performance of providers of visual inspection with acetic acid (VIA) at primary health centers, assessing their compliance with the VIA skills checklist and determinants of non-compliance, and exploring their perceptions of VIA training sessions. Materials and Methods: A cross-sectional study was conducted among VIA providers in the $Mekn\grave{e}s$-Tafilalet region of Morocco. Structured observation of their performance was conducted through supervisory visits and multiple focus group discussions (FGDs). Results: Performance of all the recommended steps for effective communication was observed in a low proportion of procedures (36.4%). Midwives/nurses had higher compliance than general practitioners (GPs) (p<0.001). All recommended steps for VIA examination were performed for a high proportion of procedures (82.5%). Compliance was higher among midwives/nurses than among GPs (p<0.001) and among providers in rural areas than those in urban areas (p<0.001). For pre-VIA counselling, all recommended steps were performed for only 36.8% of procedures. For post-VIA counseling, all recommended steps were performed in a high proportion (85.5% for VIA-negative and 85.1% for VIA-positive women). Midwives/nurses had higher compliance than GPs when advising VIA-positive women (p=0.009). All infection prevention practices were followed for only 14.2% of procedures, and compliance was higher among providers in rural areas than those in urban areas (p<0.001). Most FGD participants were satisfied with the content of VIA training sessions. However, they suggested periodic refresher training and supportive supervision. Conclusions: Quality assurance of a cervical cancer screening program is a key element to ensure that the providers perform VIA correctly and confidently.

• 보건행정학회지
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• 제15권4호
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• pp.46-64
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• 2005

This study was conducted to verify the current criteria and classification system used to determine specialized general hospitals status. In this study, we proposed a new classification system which Is simpler and more convenient than the current one. In the new classification system clinical procedure was chosen as the unit of analysis in order to reflect all the resource consumption and the complexities and degree of medical technologies in determining specialized general hospitals. We developed a statistical model and applied this model to 117 general hospitals which claim their national insurance through electronic data interchange(EDI). Analysis based on 984 clinical procedures and medical facilities' characteristic variable discriminated specialized general hospital in present without misclassification. It means that we can determine specialized general hospital's permission In new way without using the current complicated criteria. This study discriminated specialized general hospital by the new proposed model based on clinical procedures provided by each hospital. For clustering the same types of medical facilities using 984 clinical procedures, we executed multidimensional scale analysis and divided 117 hospitals into 4 groups by two axises : a variety of procedure and the Proportion of high technology Procedure. Therefore, we divided 117 hospitals into 4 groups and one of them was considered as specialized general hospital. In discriminating analysis, we abstracted proportion of 16 clinical procedures which effect on discriminating the specialized general hospital in statistical system also we identify discriminating function which include these variables. As a result, we identify 2 discriminating functions, one is for current discriminating system and the other two is for new discriminating system of specialized general hospital.

• 대한방사선기술학회지:방사선기술과학
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• 제39권3호
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• pp.323-328
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• 2016

두경부 질환의 인터벤션 시술 시 시술자가 받는 피폭선량의 평가 및 감소연구를 위한 선행 연구로써, 이온 전리함을 이용하여 인터벤션 시술 시 시술자의 위치하는 공간선량 분포를 측정하였다. Bi-plane 인터벤션 시술 장비를 대상으로 4개 구역(45, 135, 225 그리고 315도)으로 나누어 가상의 시술자가 있다는 가정아래에 시술자의 결정장기위치에서 거리(80, 100, 120, 그리고 140 cm)에 따라 조사선량을 측정하였으며, 방사선발생장치의 위치를 변화시켜 선량변화를 분석하였다. 시술자의 대부분이 위치하는 225도의 구역의 조사선량은 가장 가까운 거리인 80 cm에서 시술자 눈의 높이에서 114.5 mR/h, 가슴의 높이는 143.1 mR/h, 그리고 생식기위치는 147 mR/h이었다. 그리고 방사선 발생장치의 위치를 시술자 가까이로 변화시켰을 경우, 평균적으로 $18.1{\pm}10.5%$의 선량이 증가하였다. 본 연구에서 인터벤션 시술 동안 시술자가 위치할 수 있는 곳의 공간선량분포를 확인하였으며, 본 연구 결과를 통하여 시술자의 방사선 방어에 대하여 구체적인 계획을 수립할 수 있을 것이라 사료된다.

• 한국동물위생학회지
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• 제44권1호
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• pp.51-59
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• 2021

Various infectious diseases have threatened swine industries in Korea. One of the major risk factors of disease spread is livestock transport vehicle. For this reason, all abattoirs are required by law to have vehicle washing and disinfection facilities. However, detailed guidelines for cleaning and disinfection procedures were not provided. So in this study, assessment by visual observation was conducted to evaluate how well the cleaning and disinfection procedures of livestock transport vehicles have been performed in four different abattoirs in Jeonbuk, Korea. The observation included length of car washing time, the number of washing bay, type of washperson, type of disinfectant application, length of disinfection time, and compliance of driver's hygienic procedure. Every vehicle in all abattoirs conducted washing and disinfection procedure. However, there were procedural differences for each abattoirs and defects in the washing and disinfection procedures. In addition to that, the compliance of driver's hygienic procedure was not sufficient. Hence, detailed manuals on washing and disinfection procedures for involved people are required and it is necessary to establish an inspection and evaluation system.

• Journal of Periodontal and Implant Science
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• 제52권1호
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• pp.54-64
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• 2022

Purpose: This in vitro study was conducted to evaluate the effects of different debridement techniques and conditioning procedures on root surface morphology and blood clot stabilization. Methods: Two debridement techniques (curette [CU] vs. high-speed ultrasound [US]) and 2 conditioning procedures (ethylenediaminetetraacetic acid [EDTA] and phosphoric acid [PA]) were used for the study. Seven experimental groups were tested on root surfaces: 1) no treatment (C); 2) CU; 3) US; 4) CU+EDTA; 5) US+EDTA; 6) CU+PA; and 7) US+PA. Three specimens per group were observed under scanning electron microscopy (SEM) for surface characterization. Additional root slices received a blood drop, and clot formation was graded according to the blood element adhesion index by a single operator. Data were statistically analyzed, using a threshold of P<0.05 for statistical significance. Results: The C group displayed the most irregular surface among the tested groups with the complete absence of blood traces. The highest frequency of blood component adhesion was shown in the CU+EDTA group (P<0.05), while no differences were detected between the CU, US+EDTA, and CU+PA groups (P<0.05), which performed better than the US and US+PA groups (P<0.05). Conclusions: In this SEM analysis, EDTA and conventional manual scaling were the most efficient procedures for enhancing smear layer removal, collagen fiber exposure, and clot stabilization on the root surface. This technique is imperative in periodontal healing and regenerative procedures.

• 한국ITS학회 논문지
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• 제20권6호
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• pp.280-298
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• 2021

전 세계적으로 자율주행자동차의 개발이 활발히 진행됨에 따라 자율주행자동차에 대한 합리적이고 체계적인 평가 방법에 대한 요구가 증가하고 있다. 시뮬레이션 및 주행시험장(proving ground, PG)에서 수행하는 자율주행자동차 평가를 위한 시나리오, 평가 절차 및 방법관련 연구는 국제적으로 활발하게 진행되고 있다. 이에 비해, 실도로에서의 평가에 대한 방법 및 절차 등은 국제적으로 아직 초기 단계이다. 따라서, 향후 자율주행자동차의 상용화에 대비하여 실도로에서 자율주행자동차를 평가하는 것에 대한 연구가 진행될 필요가 있다. 본 연구에서는 실도로에서 자율주행자동차의 주행안전성 평가에 관한 기초적인 방향을 정의하고자 한다. 이를 위해 실도로에서의 자율주행자동차의 평가 방향과 프로세스를 제시했으며 주행안전성을 평가하기 위한 정성적 및 정량적 평가지표를 선정하였다. 실도로에서 자율주행자동차의 주행안전성 평가를 위한 정성적 평가항목으로 「도로교통법」을 기반으로 하여 총 38개의 항목을 선정하였다.

• 대한방사선기술학회지:방사선기술과학
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• 제40권1호
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• pp.27-34
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• 2017

해외 각국에서 발표된 중재적 방사선 영역에서의 환자선량을 조사하였으며, 전국 23개 주요 병원에서 국내에서 많이 시행되는 13개의 주요 중재적 방사선 시술에 대한 환자선량을 DAP meter를 이용하여 측정하였으며, 시술별 피폭선량에 관한 8,415 건의 국내 자료를 확보하고, 각 주요 시술별로 참고 선량치를 제시하였다. 연구결과는 경동맥화학색전술 $237.7Gy{\cdot}cm^2$, 투석용 동정맥루 인터벤션시술 $17.3Gy{\cdot}cm^2$, 하지 혈관질환의 인터벤션시술 $114.1Gy{\cdot}cm^2$, 뇌혈관조영술 $188.5Gy{\cdot}cm^2$, 뇌동맥류 코일색전술 $383.5Gy{\cdot}cm^2$, 경피경간 담즙 배액술 $64.6Gy{\cdot}cm^2$, 담도 스텐트설치술 $64.6Gy{\cdot}cm^2$, 요로 폐색에 대한 신루설치술 $22.4Gy{\cdot}cm^2$, 다목적 중심정맥 카테터 삽입시술 $4.3Gy{\cdot}cm^2$, 항암제 주입 목적의 매몰형 중심정맥 카테터 삽입시술 $2.8Gy{\cdot}cm^2$, 혈액 투석 목적의 중심정맥 카테터 삽입시술 $4.4Gy{\cdot}cm^2$, 카테터를 이용한 배액시술 $17.1Gy{\cdot}cm^2$ 그리고 장기혈관색전술 $357.9Gy{\cdot}cm^2$이다. 본 연구를 통해 얻은 선량참고치는 방사선 인터벤션 시술에서 환자선량을 줄일 수 있는 최소한의 가이드라인으로 활용될 수 있을 것으로 생각되며, 참고선량치에 대한 연구는 장비의 발달과 시술방법, 재료의 발전으로 변화될 수 있음을 감안하고 선진국에서는 5년마다 시행되고 있음을 참고할 때, 향후 면적선량을 유효선량으로 변환할 수 있는 국내시술에 적합한 한국형 변환계수가 연구되어야 할 것으로 사료된다.

• 한국IT서비스학회지
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• 제19권4호
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• pp.63-84
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• 2020

With the recent announcement of the WCAG2.2 Work Draft of the W3C, revision of the WCAG2.2 guidelines will be made soon. Consequently, the revision of KWCAG2.1 in response to changes in the domestic and international environment of web accessibility is urgent. The revision primarily involves development and selection of web accessibility evaluation items. In this study, the efficient procedures and useful methodologies for developing and selecting the evaluation items are to be presented. FGI (Focus Group Interview) has been devised to reflect every stakeholders opinion fairly. GT (Group Technology) has been applied to expedite the revision processes particularly in the FGI. QFD (Quality Function Deployment) method plays an important role in investigating the relationship between evaluation items and its characteristics, and in analyzing the importance and priorities of each item. This study proposes 5 principles, 17 guidelines and 39 evaluation items which can be used for the revision of KWCAG 2.1. This study is expected to be of great help in establishing the KWCAG 2.2 in the near future.