• 영재교육연구
• /
• 제23권1호
• /
• pp.1-24
• /
• 2013

국내 영재교육 판별에 교사관찰추천제가 적용되고 있다. 교사관찰 결과의 타당성을 확보하기 위해서는 추정 영재성을 가려낼 수 있는 양적 질적 판별방법에 대한 연구가 선행 조건이다. 이 연구는 음악(국악)영재성 선별을 위한 양적 검사도구로서의 교사관찰정보지(2차, OSTG-2) 문항을 수렴하고 그 타당성을 검증하기 위하여 수행되었다. 이를 위하여 탐색적 요인분석 및 확인적 요인분석을 실행하였고, 내적일관성 신뢰도를 추정하였다. 그 결과, OSTG-2의 최종 22 문항을 수렴할 수 있었고, 교사관찰 시 평가준거로 설정 가능한 음악(국악)영재성의 심리학적 구인을 확인할 수 있었다. 또한 OSTG-2에 대한 내적일관성 신뢰도 추정 결과, 높은 신뢰도 수준(음악성 문항 r=.852, 창의성 문항 r=.894, 과제집착력 문항 r=.924)을 확보할 수 있었다. 이 연구의 타당화 결과는 교사관찰정보지(2차, OSTG-2)가 영재판별 현장에 즉시 투입 가능한 음악(국악)영재성 선별용 검사도구임을 반영해준다.

• Journal of Welding and Joining
• /
• 제26권1호
• /
• pp.50-55
• /
• 2008

A low alloy-steel(2.25Cr-1.0Mo) has been widely used for boiler piping, header and tubes in high temperature and pressure conditions of the thermal power plant. It is common knowledge that the repair welding is permitted two or three times by customary practice rule, but there is no regulation to limit the number of repair welding base on the study heat-affected zone(HAZ), which is the weakest zone when repair welding is under taken, by experiments about the metallographic degradation and mechanical properties. Therefore, this study aims to verify the reliability of 5 times repair welding through conducting the experimental observation in the mechanical and the metallographic change on HAZ varying repair welding times. In results of the experiments, it is concluded that the reliability was kept in HAZ even up to the fifth repairs.

• 전자공학회논문지
• /
• 제52권5호
• /
• pp.197-205
• /
• 2015

함정용 전자광학추적장비 열영상센서부 전면창의 신뢰성 및 성능 개선을 위해 플라즈마 화학기상증착법을 통해 제작되는 DLC 박막을 제안하였다. DLC 박막은 현재 사용되고 있는 실리콘 박막과 비교하여 뛰어난 강도와 낮은 마찰, 화학적 안정성이 우수하며 이로 인해 해상 환경에서 필연적으로 발생하는 열영상센서 전면창의 표면 박리를 최소화할 수 있는 장점이 있다. 본 실험을 통해, DLC 박막이 갖는 물리적 특성을 바탕으로 다양한 전자광학장비에 적용이 가능함을 확인하였다.

• 대한인간공학회지
• /
• 제21권3호
• /
• pp.13-24
• /
• 2002

Reduction and prevention of human error is one of the major interests for the enhancement of system safety and availability in Nuclear Power Plants (NPPs). As human beings have become the weak point in the system safety, a systematic evaluation on human performance during emergency situation should be performed in advance to identify the potential vulnerability of human tasks. Though the data gathering and analysis from real field is an important precondition, there were no available data in nuclear field of korea. This paper presents the result of human performance analysis on emergency tasks in NNPs. Firstly, a task analysis was performed to identify the characteristics of operator tasks during emergency condition and to classify them into a set of generic emergency tasks. Secondly, simulation data were collected and analyzed for the emergency tasks using the full scope simulator of Younggwang NPPs. The analyzed human performance information cover the event diagnosis time, the execution time of each procedural step, observation parameters, typer of irrelevant response, pattern of communication among staffs, and so on. These performance data would be used for human reliability analysis and the research of human error as technical bases.

• 한국항해항만학회:학술대회논문집
• /
• 한국항해항만학회 2000년도 춘계학술대회논문집
• /
• pp.91-98
• /
• 2000

Derivation of stage-discharge relationship and characteristics for Yangsan river is presented in this paper. This research has been conducted as the second one after the first trial of 1997. The determination of discharge at a Yangsan river gauging was best made by measuring the flow velocities with a current meter and rod float. The rating curve obtained through 52 stage-discharge measurements on Yangsan river basin in 1999 is represented by Q=15.3540-140.6076H+182.44372$H^2$, which is discovered to be most excellent among other curves in reliability analysis. The capability of the observed stage-discharge data for Yangsan river was tested by HEC-RAS program, and its capability to reproduce discharge was investigated and compared with the computational results. Rating curve stability is determined on the basis of deviations in the stage-discharge relationship, utilization of specific gauge, and absolute differences between sequential stream flow measurements and an analysis residuals. Therefore it seems necessary to research method to obtain rating curve in a rigorous and accurate manner.

• Child Health Nursing Research
• /
• 제10권3호
• /
• pp.321-331
• /
• 2004

Purpose: To develop an Infant Developmental Assesment Scale appropriate for Korean infants that includes cultural context. Method: The total sample included 990 infants aged birth to 24months. The developmental tests were conducted at hospital well baby clinic, daycare centers, public health centers and homes located in city, urban and rural areas. Item analysis was done to examine content validity of the scale. Test responses were analyzed by SPSS to examine the inter-rater reliability, and construct validity. Result: Based on the naturalistic observation and analysis of other developmenta l instruments, 260 Korean infant developmental items were created. The mean score of the developmental quotient of 966 infants was 101.63±10.89. Correlation coefficient of inter-rater reliability was .99. In addition, 84.6％ of total items showed Kappa .70 and above. The development quotient was significantly different depending upon the residential area and father's occupation, therefore, construct validity using known group technique was supported. Conclusion: The developed instrument can be used to assess the development of handicapped infants, as well as normal infant's general abilities and to study individual differences within the normal range for Korean.

• 한국산업융합학회 논문집
• /
• 제22권6호
• /
• pp.681-688
• /
• 2019

SM45C steel, which is widely used for mechanical structure, was carburized at 870℃ for 4 hours and tempered at 300℃ and 400℃ for 1, 3 and 6 hours. The tempered materials were evaluated for tensile test, hardness test and impact test. In particular, the hardness and the absorption energy were evaluate the reliability by the Weibull statistical analysis. 300℃-1h specimen is considered to be the best heat treatment condition in the tensile stress and the observation of fracture surface. 300℃-1h specimen showed larger shape and scale parameter than the other specimens, and Rockwell hardness variance was small and showed the best characteristics. 400℃-3h specimen showed larger shape and scale parameter than the other specimens, the dispersion of impact absorption energy is small, and showed excellent characteristics.

• International Journal of Knowledge Content Development & Technology
• /
• 제11권1호
• /
• pp.29-48
• /
• 2021

The paper discusses the ICT infrastructure as far as the availability of (computers, local or wide area networks, Internet connectivity and its reliability, size of the bandwidth and its optimization, etc.) in the S&T research institution. It also examined the profile of the research scientists and looked at the type of ICT infrastructure that is available for their use as well as the reliability of the Internet connectivity within these research institutions. It looked at the broadband capacities of the research institutions and the ICT capabilities in respect of the technical and managerial support back-up that are available to the research institutions. The study used the survey research method with a questionnaire as well as personal observation to gather the data. From the data gathered, it was realized that the internet connectivity and the size of the bandwidth that the R&D institutions subscribed to differed significantly. Again, the extent to which the research scientists were able to access the internet in their respective institutions depended on the quality of the local network in place. Generally, the investments in ICT were made for different management objectives, and these were meant to facilitate the generation of new knowledge as well as make measurable improvements in R&D activities.

• 아태비즈니스연구
• /
• 제12권1호
• /
• pp.87-100
• /
• 2021

Purpose - This study aims to examine the antecedents of willingness to pay in the domain of duty free shop. Design/methodology/approach - This study chooses willingness to pay as explained variable. The candidates of explanatory variables are price fairness, brand awareness, employee service, product diversity, and crowding. This study uses survey to explore the linear relation between variables. This research collected data using online panel data collection service. The number of valid observation is 265. The research targe is Lotte duty free store. Statistical analysis was for statistical inference. To attain the information of survey respondents, frequency analysis is employed. Next, this study implemented exploratory factor analysis and reliability to ensure both validity and reliability of measurement items. This study executed multiple regression analysis to test research hypotheses Findings - Regrading results, brand awareness, employee service, and product diversity are positively associated with willingness to pay of duty free shop product. Moreover, the results of regression analysis suggest the inverted-U shape association between crowding and willingness to pay. However, price fairness appeared as non-significant variable to account for willingness to pay in the multiple regression analysis. Originality - This study contributes to the literature by examining duty free shop customers more.

• 한국보육지원학회지
• /
• 제9권6호
• /
• pp.309-337
• /
• 2013

본 연구는 루브릭 형태로 개발된 유아 평가 중 타당성과 신뢰성을 검증받은 미국 하이스코프 재단의 유아용 Child Observation Record-II를 국내 유아를 대상으로 사용할 수 있도록 타당화하여 유아관찰기록척도(K-COR-II)로 명명하는데 있다. 이를 위해 서울, 인천, 대전, 경기 및 충북에 소재한 8개 어린이집의 만 3세부터 만 6세 유아 255명과 담임교사 32명을 대상으로 2개월 이상의 관찰 후 K-COR-II를 사용하여 평정을 실시하였고, 공인타당도 확보를 위하여 K-CDI를 함께 실시하였다. 신뢰도와 문항양호도 검중 및 타당도 검증을 위해 상관분석과 탐색적, 확인적 요인분석 및 AVE와 개념신뢰도 지수를 산출하였다. 그 결과 K-COR-II 각 항목의 내용타당도는 높게 나타났으나, 판별타당도 분석 결과 하위영역 간의 차별성은 떨어지는 것으로 밝혀졌다. 확인적 요인분석과 AVE 및 개념신뢰도 지수 산출 검토 결과 집중타당도는 만족스러운 것으로 나타났으며, K-CDI를 이용한 공인타당도 결과 각 영역 간 상관은 통계적으로 유의미한 수준으로 나타났다. 관찰자간 신뢰도와 영역별 항목간 내적합치도 또한 만족스러운 수준으로 판단되어 신뢰도 또한 확보되었으며, 각 문항별로 상 하 집단 간의 유의한 평균 차이가 있는지를 알아본 결과, 문항변별도 또한 만족스러운 것으로 판단되었다. 이에 타당화된 K-COR-II가 유아교육 및 보육현장에서 유아의 발달 수준을 가늠하는데 활용가능한 신뢰롭고 타당한 도구로 판단되었다.