• Korean Medical Education Review
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• v.4 no.1
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• pp.1-15
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• 2002

본 연구의 목적은 의학교육입문검사의 개념의 틀을 형성하는데 있다. 본 연구의 목적을 구체적으로 살펴보면 다음과 같다. 첫째, 본 연구는 의학교육입문검사라는 의학 적성측정도구를 개념화 하기위하여 지금까지의 일반적인 적성 검사와는 달리 의학적 인지능력 정의적 심리 구인과 의학관련 배경지식과 사고라는 의학적 적성 스펙트럼을 만들고자 한다. 한국 상황에서 적용가능하고 21세기에 요구하는 의학교육입문검사를 개념화하여 이론적 틀을 만들고자 했다. 둘째, 이 연구는 의학교육입문검사의 개념의 틀 위에서 각 개념을 양화를 통한 측정도구의 가능성을 열었다. 셋째, 본 연구는 본 검사를 통하여 의학대학과 의학전문대학원 지원 하고자하는 사람들에게 다양한 개인의 정보를 부여할 뿐만 아니라, 대학과 대학원에서의 학생 선발의 타당성을 높일 수 있는 실제적 자료를 제공해 입시사정에 유용한 자료를 얻을 수 있다는 의미에서 실제적 가치를 갖고 있다.

• Proceedings of the Korean Nuclear Society Conference
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• 1996.05a
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• pp.321-326
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• 1996

원자력발전소의 경보기능을 향상시키기 위하여 기존 경보기술 및 개량형 경보기술의 장단점을 평가하고 적용기술의 타당성을 검토하였다. 분석결과 기존 경보계통의 경우 경보생성논리의 한계성으로 인해 새로운 경보처리 알고리즘을 적용하는데 한계가 있는 것으로 나타났으며, 개량형 경보계통에서는 새로운 경보처리 알고리즘이 수용가능하나 제어실 설계에 따른 경보표시 기기의 배치 및 운용은 특정 알고리즘의 수용이 불가하거나 수정을 필요로 하는 것으로 나타났다. 본 평가분석은 개량형 경보처리기술 선정시 고려사항과 각 기술들의 적용 한계성을 보여주므로써 후속 원전 경보계통의 개발 및 구현시 활용될 수 있다.

• Proceedings of the KIPE Conference
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• 2019.07a
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• pp.305-306
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• 2019

본 논문에서는 고전압 커패시터 충전용 3상 LCC 공진형 컨버터를 설계하고 제작하였다. 고전압 커패시터 충전시간과 충전전압간에 선형성을 확보하기 위하여 컨버터는 충전 전 구간에서 정전류원으로 동작하도록 설계되었다. 공진탱크 설계를 위해서 FHA(Fundamental Harmonic Analysis) 기법을 이용하여 첨예도(Q; Quality factor)와 기저 주파수 변동에 따른 입출력 전류이득특성을 도출하였고 이를 바탕으로 28.8kJ/s의 충전속도를 가지며 최대 충전전압은 10kV 인 3상 LCC 공진형 컨버터를 제작하였다. 제작된 컨버터는 10kV, 600kJ 규격의 12mF 고전압 커패시터를 이용한 충전 실험을 통해 설계의 타당성을 확인하였다.

• Journal of The Korean Association For Science Education
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• v.36 no.1
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• pp.177-190
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• 2016

The purpose of this study is to validate learning progressions for Earth's motion and solar system from two different perspectives of validity. One is construct validity, that is whether a hypothetical pathway derived from our study of LPs is supported by empirical evidence of children's substantive development. The other is consequential validity, which refers to the impact of LP-based adaptive instruction on children's improved learning outcomes. For this purpose, 373 fifth-grade students and 17 teachers from six elementary schools in Seoul, Kangwon province, and Gwangju participated. We designed LP-based adaptive instruction modules delving into the unit of 'Solar system and stars.' We also employed 13 ordered multiple-choice items and analyzed the transitions of children's achievement levels based on the results of pre-test and post-test. For testing construct validity, 64 % of children in the experimental group showed improvement according to the hypothetical pathways. Rasch analysis also supports this results. For testing consequential validity, the analysis of covariance between experimental and control groups revealed that the improvement of experimental group is significantly higher than the control group (F=30.819, p=0.000), and positive transitions of children's achievement level in the experimental group are more dominant than in the control group. In addition, the findings of applying Rasch model reveal that the improvement of students' ability in the experimental group is significantly higher than that of the control group (F=11.632, p=0.001).

• Journal of The Korean Association For Science Education
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• v.34 no.8
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• pp.703-718
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• 2014

This study sought to investigate learning progressions for astronomical systems which synthesized the motion and structure of Earth, Earth-Moon system, solar system, and the universe. For this purpose we developed ordered multiple-choice items, applied them to elementary and middle school students, and provided validity evidence based on the consequence of assessment for interpretation of learning progressions. The study was conducted according to construct modeling approach. The results showed that the OMCs were appropriate for investigating learning progressions on astronomical systems, i.e., based on item fit analysis, students' responses to items were consistent with the measurement of Rasch model. Wright map analysis also represented that the assessment items were very effective in examining students' hypothetical pathways of development of understanding astronomical systems. At the lower anchor of the learning progression, while students perceived the change of location and direction of celestial bodies with only two-dimensional earth-based view, they failed to connect the locations of celestial bodies with Earth-Moon system model, and they could recognized simple patterns of planets in the solar system and milky way. At the intermediate levels, students interpreted celestial motion using the model of Earth rotation and revolution, Earth-Moon system, and solar system with space-based view, and they could also relate the elements of astronomical structures with the models. At the upper anchor, students showed the perspective change between space-based view and earth-based view, and applied it to celestial motion of astronomical systems, and they understood the correlation among sub-elements of astronomical systems and applied it to the system model.

• Journal of Gifted/Talented Education
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• v.22 no.1
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• pp.61-85
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• 2012

The OSPG(Observation Scale for Parents of the Gifted in Korean Traditional and Western Music) is one of the tools for screening of the Gifted in Korean traditional and Western music. So the validity and reliability of the OSPG has an influence on securing validity of the whole identification process. The purpose of this study is to examine the validity and reliability of the OSPG-2 that input screening processing, and to suggest systematization of identification processing for the Gifted in Korean traditional and Western Music. For the achievement of this purpose, this study administered the OSPG-2 to 261 gifted students aged between 13 and 16 in the middle or high school for the arts. To validate the OSPG-2, I analyzed items of the OSPG-2, and conducted the exploratory and confirmative factor analysis. I also examined the internal consistency. As a result of the exploratory factor analysis, I collected 40 items of the OSPG-2 finally. Furthermore, I could identify psychological construct of the Gifted in Korean traditional and Western Music. The consequence of confirmative factor analysis, the model provided good fit to observed data. As a result of reliability analysis, the internal consistency of the internal characteristic verified Cronbach's ${\alpha}$=.939, and the internal consistency of the external environmental characteristic verified Cronbach's ${\alpha}$=.887. This result of validity study reflects the fact that the OSPG-2 is a valid scale and is able to input to gifted educational field instantly.

• Journal of Gifted/Talented Education
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• v.23 no.1
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• pp.1-24
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• 2013

The OSTG (Observation Scale for Teachers of the Gifted in Korean Traditional and Western Music) is one of the tools for screening of the Gifted in Korean traditional and Western music. So the validity and reliability of the OSTG-2 has an influence on securing validity of the whole identification process. The purpose of this study is to examine the validity and reliability of the OSTG-2 that input screening processing, and to suggest systematization of identification processing for the Gifted in Korean traditional and Western Music. For the achievement of this purpose, this study administered the OSTG-2 to 195 teachers of gifted students aged between 13 and 16 in the middle or high school for the arts. To validate the OSTG-2, I analyzed items of the OSTG-2, and conducted the exploratory and confirmative factor analysis. I also examined the internal consistency. As a result of the exploratory factor analysis, I collected 22 items of the OSTG-2 finally. Furthermore, I could identify psychological construct of the Gifted in Korean traditional and Western Music. The consequence of confirmative factor analysis, the model provided good fit to observed data. As a result of reliability analysis, the internal consistency of musicality verified cronbach' ${\alpha}$=.852, and the creativity verified cronbach' ${\alpha}$=.894, the task commitment verified cronbach' ${\alpha}$=.924. This result of validity study reflects the fact that the OSTG-2 is a valid scale and is able to input to gifted educational field instantly.

• 재활복지
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• v.21 no.1
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• pp.27-46
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• 2017

The purpose of this study is to develop tool for the assessment of employment preparedness for people with visual impairments. First, we developed a draft assessment factors. Expert opinion survey, delphi survey, pilot test were conducted to modify contents of the factors. Actual assessments were carried out to test the reliability and validity of the developed tool targeting job seeker with visual disabilities. The total number of valid samples are 253. Principal component analysis, confirmatory factors analysis, and correlation analysis were used for the validity test. Chronbach' alpha analysis was used for the reliability test. As a result of the reliability analysis, the reliability coefficient showed good level of 0.88-0.92. As a result of the factor analysis, it was confirmed that the composition concept of 9 factors were well reflected. The correlation coefficient between employment preparedness tool and job screening tool was 0.501, Which was statistically significant. Therefore, it was evaluated as having a concurrent validity. Finally, it was confirmed that the assessment of employment preparedness for people with visual impairments was valid as assessment tool.

• The Transactions of the Korean Institute of Power Electronics
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• v.3 no.4
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• pp.399-406
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• 1998

This paper proposes an instantaneous torque control method for the high performance SRM drive. In first, we e establish SRM model with the characte1istics of the torque. phase current and rotor position which were measured in t the experimental SRM. Based on this model. the reference torque waveform to minimize torque ripple is obtained by t the control of resultant torque considering phase torque overlap according to the variation of load and speed. And the r reference current waveform for the tracking of reference torque are decided. The control method for tracking the r reference current is used the delta modulation technique. The proposed method is validated by the comparing with S simulation and experimental results.

• Korean Journal of Cognitive Science
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• v.13 no.4
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• pp.22-22
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• 2002

The interest in enhancing creativity in the areas of education and business is at on all time high. It was claimed that there are two underlying assumptions behind the research in enhancing creativity: One is that creativity is a construct revealing individual differences, and the other is that creativity is a cognitive skill. After the origins of these assumptions were examined, their validity was discussed. It was argued that there is no strong empirical evidence to support these assumptions, although they are still viable working hypotheses. A brief discussion on the future direction was followed to identify creativity as a cognitive skill revealing individual differences.