• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2002년도 유체기계 연구개발 발표회 논문집
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• pp.354-359
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• 2002

The new piston prover was developed and the flow measurement uncertainty of this piston prover was evaluated according to ISO/IEC 17025. The laser interferometer was employed to measure accurately the testing time. Uncertainty was calculated with evaluation of various uncertainty factors affected in flow measurement. The expanded uncertainty(U) of the piston Over was $1.3{\times}10^{-3}$ (at the confidence level of $95\%$). This evaluation example will be useful in flow measurement uncertainty determination of other gas flow measurement system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 B
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• pp.969-971
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• 1999

Wavelet analysis is applying to many fields such as the time-frequency localization of a time series and a time varying data. In this paper, a statistical testing based Wavelet power spectrum analysis for the stationary Nino3 Sea Surface Temperature(SST) data was executed. Specially, the 95% confidence level for SST was effective in searching the periods of El-Nino using various wavelet basis functions.

• 한국수학교육학회지시리즈A:수학교육
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• 제51권1호
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• pp.63-76
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• 2012

The purpose of this study is to investigate the effect of cooperative learning in mathematics in university level. We share reflections from 54 and 57 students in linear algebra courses which were conducted by cooperative learning. We examine how students increase self-confidence and reduce the anxiety in learning, and also develop the social skills in communication.

• Journal of Advanced Marine Engineering and Technology
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• 제14권1호
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• pp.90-98
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• 1990

The liquid ejector, having no moving, lubricating and leaking parts, is widely used as the various pumps because of its high working confidence and simplicity. Previously, computer aided design program for the small-sized liquid ejector was developed based on the one-dimensional flow analysis and the systematical laboratory level experiments. Through the present research, it is confirmed that the previously developed computer program to getermine the main design dimensions and to calculate the expected performance curve is satisfactorily applied to design the large liquid ejectors.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 추계학술대회 논문집 전기물성,응용부문
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• pp.190-191
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• 2006

In this paper, a method to assess the reliability of an insulating spacer used in gas insulated switchgear by electrical accelerated lifetime test is represented. And a test plan to assure the expected lifetime with 90 % confidence level is also included.

• Environmental Engineering Research
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• 제22권4호
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• pp.369-376
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• 2017

The trend analysis of the study was acquired by selecting multiyear monthly groundwater table data and monitors the wells in each sub-district under the study area. The intention of this research was to analyze the outcome of the non-parametric Mann-Kendall test at greater than the significance level which is 95% of groundwater level in Sylhet. The aptitude is effective at two conjunctures where the confidence bounds are 95% and it meets the estimate line of Sen's. To calculate and assess the spatial differences in the inanition of groundwater table, geostatistical methods was applied based on data from 27 groundwater wells during the period from January 1975 to December 2011 which were obtained from a secondary source, Bangladesh Water Development Board. The geographic information system was used to assess the spatial change in order to find the level of groundwater. Cross-validation errors were found within an advisable level in estimating the groundwater depth with different interpolation models of ordinary kriging methods. Finally, surface maps were generated with the best-fitted model. The southeast region was found highly vulnerable from groundwater level point of view. Northern region was detected highest hazard prone area for diverge groundwater using kriging method.

• Toxicological Research
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• 제18권1호
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• pp.65-71
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• 2002

A benchmark dose (BMD) approach has been evaluated us a replacement for the traditional NOAEL methodology currently being wed to assess the noncancer effects of toxicants. The endocrine disrupt-ing effect of endosulfan which showed decrement of sperm count and testicular testosterone level in animals, was currently reported. The amount of endosulfan used as pesticide in the country has been continuously increased. The aim of this study was to suggest the permissible intake level (PIL), corresponding to Accept-able Daily Intake (ADI), based on endocrine disrupting effect wing BMD. Various animal data were collected by consideration of critical effect showing endocrine disruption and an animal data for reproductive toxicity was selected. The Power model from BMD software for induction of $BMD_10$ having meaning which is the dose at the 95% lower confidence limit on a 10% response was used due to that the form of selected dose-response animal data was continuous data. The $BMD_10$ was estimated to be 0.393 mg/kg/day based on reproductive toxicity showing decrement of sperm count. The permissible intake level (PIL) was calculated by dividing the $BMD_10$ by the uncertainty factors of 100 with consideration of from animal to human and human variability. The PIL as 0.004 mg/kg/day was compared with traditional ADI as 0.006 mg/kg/day based on the incidence of marked progressive glomerulonephrosis and blood vessel aneurysm in males.

• 인지과학
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• 제33권1호
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• pp.77-93
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• 2022

선행 연구들에서는 그럴듯한 기준점이 극단적 기준점보다 더 큰 기준점 효과를 야기하는 반면, 주어진 문항과 관련된 개인의 지식수준이 높으면 기준점 효과가 작아진다고 보고하고 있다. 하지만 제시되는 기준점이 그럴듯한지 여부와 주어진 문항 자체의 난이도가 기준점 효과에 미치는 영향을 함께 살펴본 연구는 없었다. 따라서 본 연구에서는 기준점의 극단성과 문항의 난이도가 기준점 효과에 미치는 영향을 살펴보았으며, 이에 더해 응답 확신도와 기준점 효과의 관계도 살펴보았다. 이를 위하여 예비 연구를 통해 쉬운 문항과 어려운 문항, 그럴듯한 기준점과 극단적인 기준점을 선정하였다. 본 실험은 '표준 기준점 실험 절차' 에 따라 진행되었다. 연구 결과, 기준점의 극단성과 문항의 난이도는 각각 기준점 효과에 영향을 미쳤으며 문항의 난이도는 응답 확신도에도 또한 영향을 미쳤다. 구체적으로, 그럴듯한 기준점을 제시했을 때와 어려운 문항을 제시했을 때에 기준점 효과가 크게 나타났다. 또한 자신의 수행에 대한 확신이 낮을수록 극단적인 기준점이 제시되었을 때 기준점의 영향을 크게 받았다. 이러한 결과는 기준점이 그럴듯한지와 문항의 난이도에 따라 기준점 효과의 크기와 확신 정도, 그리고 기준점 효과와 확신도 사이의 상관관계가 다르게 나타난다는 것을 보여준다. 본 연구의 결과는 기준점의 특성이나 개인의 상태에 따라 기준점 효과가 달라진다고 제안하는 기준점 효과에 관한 태도 변화 관점을 뒷받침한다.

• 품질경영학회지
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• 제41권4호
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• pp.649-657
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• 2013

Purpose: In this study, the actual situation of domestic firms vulnerable to industrial security competence will be discussed. And accordingly be discussed for effective response measures. Methods: Using a structured questionnaire by mail, fax, e-mail and fill method was used respondents. By the end of '10 R&D Center, which holds 15,247 companies(population) among the 95% level of confidence, tolerance ${\pm}3%$ p-level corporate type, sector, region extraction method stratified multi-level companies were investigated through the final 1529. Results: The average level of industrial security capabilities 43.8%(out of 100) is very weak, so urgent and positive response measures also need to be investigated sought. Conclusion: we propose the effective management framework and improvement plans to prevent illegal industrial leakage are to be made.

• 한국엔터테인먼트산업학회논문지
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• 제13권4호
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• pp.401-410
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• 2019

병원 입원환자들이 갈수록 고령화되고 질병의 중증도가 높아져서 섬망 발생율이 증가하고 있다. 본 연구는 간호학생들을 대상으로 섬망지식, 섬망간호 자신감과 섬망간호 수행도를 파악하고, 이들 요인들이 섬망간호 수행도에 미치는 영향을 규명함으로써 섬망간호 교육전략에 기초자료를 제공하고자 시도하였다. 연구 대상자는 G시에 소재한 3개교의 간호학과 4학년 학생 252명이며, 자료수집 방법은 2017년 4월부터 9월까지 구조화된 설문지를 통하여 수집하였다. 섬망지식은 조귀래(2001)가 개발하고 박용숙(2011) 수정한 도구, 섬망간호 자신감은 Akechi 등(1996)이 개발하고 김문자(2014)가 번역하고 수정 보완한 도구, 섬망간호 수행은 서희정과 유양숙(2006)이 개발한 도구를 김미영과 은영(2013)이 수정 보완한 도구를 사용하였다. 수집된 섬망간호 수행에 영향요인에 대한 자료는 단계적 다중 회귀분석으로 분석하였다. 대상자의 섬망 지식은 47점 만점에 29.0점, 섬망간호 자신감은 150점 만점에 71.7점, 섬망간호 수행은 69점 만점에 41.2점으로 나타났다. 대상자의 일반적 특성에 따른 섬망간호 수행은 섬망환자 경험(t=7.719, p<.001), 섬망 간호진단 사용 경험(t=4.850, p=<.001), 섬망간호 교육(t=3.039, p=.003), 임상실습 만족도(t=3.526, p=.001), 섬망환자 경험 부서(t=3.446, p=.001), 중환자실 실습 경험(t=5.349, p<.001)에 따라 유의한 차이를 나타냈다. 섬망간호 수행은 섬망 지식(r=.140, p=.026)과 섬망간호 자신감(r=.341, p<.001) 간에 유의한 순 상관관계가 있었다. 섬망간호 수행에 가장 주요한 예측 요인은 섬망환자 간호 경험(β=.314, p<.001) 섬망간호 자신감(β=.174, p=.003), 중환자실 실습 경험(β=.170, p=.001), 섬망 간호진단 사용경험(β=.129,p=.026), 실습만족도(β=.109, p=.048)의 순으로 나타났다. 모형의 설명력은 28.8%였다(F=22.307, p<.001). 본 연구결과, 간호학생들의 섬망간호 수행을 높이기 위해 섬망환자 간호 경험, 섬망간호 자신감, 중환자실 실습 경험, 섬망관련 간호진단, 실습만족도를 고려한 섬망간호 교육전략의 개발이 필요하다.