• 충청수학회지
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• 제26권1호
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• pp.181-190
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• 2013

In this paper we study the Putinar's matricial model operator of rank 2 and provide some evidences for the validity of the conjecture in [8].

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1999년도 하계종합학술대회 논문집
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• pp.29-32
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• 1999

In this study, the time delay model were simulated using the well-known AR model. Frequency response of the time delay model can be obtained by mapping AR model to JTC model in the time domain. That is, from the few measurement data in JTC model, the channel frequency response can be obtained by the estimation of AR model parameters. From this channel frequency response, the time delay model can be obtained using Fourier transformation. To prove the validity of the suggested method, three models of JTC were shown and analyzed.

• 대한공업교육학회지
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• 제39권2호
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• pp.101-121
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• 2014

이 연구는 고교 단계에서의 실전 창의형 인재 양성을 위한 NCS 기반 직업교육과 정의 모형을 개발하는 것이 목적이다. 이 연구를 효과적으로 수행하기 위해 사용한 연구 방법은 국내 외 문헌 연구, 내용 분석 연구, 사례 연구, 전문가(9명) 협의회 및 검토 자문 위원(3명)의 심층 면담 조사 방법으로 수행하였다. 또한 구안한 모형(안)의 타당도 확보를 위해 평균, 표준 편차, 내용 타당도 비율(CVR)로 분석하였다. 이 연구의 주요 개발 결과는 다음과 같다. 첫째, NCS 개발 매뉴얼과 훈련기준 활용 훈련과정 편성 매뉴얼, NCS 학습모듈 개발 매뉴얼과 사례집, NCS 연구보고서, NCS 기반 고교 단계 직업교육과정의 시범 개발 자료집과 사례 연구 분석, 국내 외 직업교육 모형 등 NCS 관련 선행 및 문헌 연구를 토대로 실전 창의형 인재 양성을 위한 NCS 기반 직업교육과정의 기본 모형(안)을 개발하였고 둘째, 구안한 모형(안)의 단계별 영역별 해당 하위 구성 요소 도출 자료를 토대로 전문가 심층 면담 조사 내용과 의견을 반영하여 최종 19개를 도출하였다. 즉 1단계의 영역별 하위 구성 요소로 능력단위, 능력단위정의, 능력단위요소, 수행준거, 적용범위 및 작업상황, 평가지침, 직업기초능력이고 2단계의 영역별 하위 구성 요소는 교과목명, 교과목표, 대단원명, 대단원목표, 교수 학습 방법, 평가방법, 직업기초능력이며 3단계 영역별 해당 하위 구성 요소로 NCS 기반 교과목 행렬표, NCS 기반 교과목 프로파일, NCS 기반 직업교육과정 편제표, NCS 기반 교과목 전체 구성도, NCS 기반 직업교육과정의 운영계획서를 도출하였다. 셋째, 1단계와 2단계 각각의 해당 하위 구성 요소를 3단계의 NCS 기반 교과목 프로파일과 연계 구성하여 모형(안)을 개발하였다. 넷째, 모형(안)에 대해 단계별 영역별로 타당도를 검증한 결과 평균이 4.67이고 CVR 값은 1.00으로 타당도가 매우 우수함을 알 수 있었다. 또한 해당 하위 구성 요소 도출 내용에 대한 평균이 모두 4.33 이상이며 CVR 값은 1.00으로 타당도가 매우 높았고 모형(안)의 연계 구성에 대한 평균도 모두 4.33 이상이며 CVR 값도 1.00이었다. 그리고 표준 편차는 .50 이하로 편차가 모두 작은 것으로 나타났다. 다섯째, 전문가에 의한 타당성 검증 자료와 검토 자문 위원들의 심층 면담 조사 내용을 토대로 모형(안)을 수정 보완 단계를 거쳐 고교 단계에서의 실전 창의형 인재 양성을 위한 NCS 기반 직업교육과정의 모형을 개발하였다.

• 대한간호학회지
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• 제39권5호
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• pp.700-708
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• 2009

Purpose: This study was done to test the validity and reliability of the Adolescent Mental Problem Questionnaire (AMPQ) for Korean high school students. Methods: The AMPQ was designed to assess adolescents', mental health status and problem behavior (Ahn, 2006). A methodological study design was used with exploratory factor analysis, Pearson's correlation coefficients, and a fitness of the modified model for validity. Also, Cronbach's alpha coefficients and alternative-form method for reliability were used. AMPQ was tested with a sample of 36,313 high school students. The participants consisted of 18,701 males and 17,612 females. Results: Seven factors were extracted through factor analysis: 'Psychiatric problems', 'Delinquency', 'Academic troubles', 'Family problems', 'Hazardous behavior', 'Harmful circumstance', 'Eating problems'. These factors explained 51.1% of the total variance. The fitness of the modified model was good ($X^2$=38,413.76, Goodness of Fit Index [GFI]=.94, Adjusted Goodness of Fit Index [AGFI]=.93, Comparative Fit Index [CFI]=.95, Root Mean Square Error of Approximation [RMSEA]=.05), and concurrent validity with Korea-Youth Self-Report [K-YSR] was .63. Cronbach's alpha coefficient of the 31 items was .85. Conclusion: The results of present study suggest that the modified AMPQ instrument may be useful for efficiently assessing mental health status and problem behavior in late adolescent, high school students.

• 대한불안의학회지
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• 제13권2호
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• pp.115-122
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• 2017

Objective : The experiences in close relationships questionnaire-revised (ECR-R) (Fraley, Waller & Brennan, 2000) is a valuable tool for measuring adult attachment, and its Korean version, the ECRR-K (Kim, 2004), is widely used in Korea. However, given its substantial length, this study was aimed to develop and validate a short version of the ECRR-K called the ECRR-K14. Methods : Two hundred and ninety-four medical students participated in this study in 2016. They completed the ECRR-K, the Perceived Stress Scale (PSS), the Rosenberg Self-Esteem Scale (RSES), and the UCLA Loneliness Scale (UCLA-LS). The study authors applied the Rasch rating scale to check each item's model fit and then performed confirmatory factor analyses (CFAs) to test the new scale's validity. Results : The authors selected seven items each for the anxiety and avoidance subscales, and the ECRR-K14 showed fair to good internal consistency (Cronbach's ${\alpha}=0.93$ and 0.92 for anxiety and avoidance, respectively). The anxiety subscale showed concurrent validity with the PSS and the RSES while the avoidance subscale showed concurrent validity with the UCLA-LS. The CFAs also demonstrated the validity of the model with a goodness-of-fit index of 0.916. Conclusion : The ECRR-K14 showed excellent reliability and validity and appears to be a promising instrument for measuring the two attachment dimensions in adults.

• Human Ecology Research
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• 제57권2호
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• pp.225-241
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• 2019

This study develops and validates an objective scale to measure newspaper use at home by elementary school students and parents. We developed a preliminary scale of 59 items through the review of literature on newspaper use and mediation as well as the examination of content validity by education experts. Collected data were analyzed using SPSS 21.0 and AMOS 21.0 programs. A total of 42 items were supported by 703 parents with students in grades 1-6 using exploratory factor analysis. The model included 3 categories and 9 sub-factors: instruction (modeling, restriction, and text instruction), activities (play activity, conversation, online mediation, and scrap activity), and belief (academic achievement and information acquisition). Confirmatory factor analysis confirmed and validated the model fit; in addition, convergent validity, and discriminant validity, and cross validity was confirmed through correlation analysis by gender comparison and grade comparison. We also verified the validity of this scale through correlation analysis based on Yu and Jung (2012)'s newspaper mediation variables and scale in regards to children's motivation for using newspapers. Finally, internal consistency reliability and half reliability were also confirmed. In conclusion, the suitability and stability of home newspaper utilization scale for elementary students (HNUS-E) were confirmed. This scale provides parents and educators with ideas for the development of the children's literacy, cognitive, and affective domains that can be effectively used in research on newspaper use for school-aged children.

• 실천공학교육논문지
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• 제15권1호
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• pp.193-198
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• 2023

본 논문은 파이썬 프로그래밍 교육에서 단원별 연습문제의 타당성을 분석하였다. 단원별로 제시되는 연습문제는 온라인 학습 시스템을 통해 제시되고 학생 각자가 답안 코드를 업로드하여 자동으로 채점된다. 한학기 동안 진행되는 파이썬 교육을 통해, 학생들의 중간시험점수, 기말시험 점수 그리고 각 단원별 연습문제 점수 등 데이터가 수집된다. 수집된 데이터들을 통해, 자동채점 연습문제들의 타당도를 분석하여 단원별 연습문제들을 개선할 수 있다. 본 논문에서는 자동 채점 연습문제들의 타당도를 분석하기 위해, Orange 머신러닝 도구를 사용하였다. 파이썬 과목에서 수집된 데이터를 전체, 상위권 그리고 하위권 그룹별로 4가지 분석을 실시하고 종합적으로 비교한다. 파이썬 단원별 연습문제 점수들로부터 학생의 최종 성적을 예측하는 머신러닝 모델의 예측 정확도로부터 단원별 자동채점 연습문제의 출제 타당도를 분석하였다.

• 한국멀티미디어학회논문지
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• 제19권12호
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• pp.2000-2013
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• 2016

The purpose of this study is to validate the validity of the methodology for analyzing the space with complex characteristics and to evaluate the existing spatial structure analysis theory. Seven example models are designed and analyzed data of spatial syntax analysis and visibility graph analysis. And analyzed the agent-based model using two analytical methods: the adjacent space and the whole spatial connection. The results of this study are as follows. Based on the analysis of the agent - based model for perfectly freewalking, the validity of the method is verified in terms of predictive ability and effectiveness. Agent-based models can be simulated considering various variables, so realistic predictions will be possible and a new biography of complex systems can be met.

• 전자공학회논문지A
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• 제32A권1호
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• pp.45-52
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• 1995

A new Kirchhoff approximation(KA) method was proposed for microwave scttering from randomly rough surfaces. Using the spectral representation of delta function and its sifting theorem, a new KA was formulated directly without any further approximation, and this formulated was used to compute exact backscttering coefficients. The validity of the KA was verified by a numerical method, and this new KA technique was used to evaluate the existing approximated KkA methods; i.t., the zeroth-order and the first-order approximated physical optics(PO) models. It was shown that the first-order approximated PO model has small error than the zeroth-order approximated PO model at low incidence angles and the opposite happens at higher incidence angles. This new KA model can be used to compute exact scattering coefficients in the validity regions of KA and to evaluate other theoretical and numerical models for scattering from randomly rough surfaces.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회/대한산업공학회 2003년도 춘계공동학술대회
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• pp.931-939
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• 2003

This paper is aimed at proposing a new framework to predict decision performance, by Investigating decision maker's cognitive resonance. We assume that every decision maker has two kinds of schema­emotional schema and rational schema. Cognitive resonance is believed to have a close relationship with the two schemata and decision performance. In literature on decision performance there is no study' seeking relationship among the two schemata ana cognitive resonance. Therefore, our research purposes are twofold: (1) to provide a theoretical basis for the proposed framework describing the causal relationships among two schemata, cognitive resonance, and decision Performance, and (2) to empirically prove its validity applying to. Internet shopping Situation. Based on the questionnaires from 13S- respondents, we used a second order confirmatory factor analysis (CFA) to extract valid constructs, and structural equation model (SEM) to calculate path coefficients and prove the statistical validity of our proposed research model. Experimental results supported our research model with some further research issues.