• 영어어문교육
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• 제18권2호
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• pp.21-44
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• 2012

This paper aims to discuss the effects of learning how to write English interrogative sentences. 122 students who participated in the study learned basic structural components of English questions and practiced writing questions by inversing the subject and the verb in a given declarative sentence. The participants were divided into two groups: Group 1 which was given a brief explanation of interrogative structures and practices, and Group 2 which was given the same explanation and practices in addition to an assignment for which they had to make one or two comprehension questions based on reading a passage. For the pre-tests and the post-tests, they took a TOEIC reading test with 40 questions and a structure test with 25 questions. The results of the tests show that both groups improved significantly in the two post-tests, benefiting from this learning method. However, the additional treatment for Group 2 did not seem to be highly effective. In the questionnaire survey, the participants think that the method of learning English questions has helped them better understand English grammar as well as interrogative structures. The participants were also divided into three different levels: high, intermediate, and low. The intermediate level group students benefited most from learning writing questions as the results of the post-test of the 25-questions test and the final exam of the course show.

• Child Health Nursing Research
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• 제9권2호
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• pp.198-205
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• 2003

Purpose: The purpose of this study is to investigate the degree of school children's internet addiction and to explicit the relationship among the internet addiction, family environment and school adjustment. Method: The subjects of the study were 640 students from 5th and 6th year children of five elementary schools in G city. The data were analyzed by SAS program with frequency, percentage, means, standard deviation, χ² -test, ANOVA and Pearson's Correlation Coefficient. Result: In the degree of the internet addiction were 10.0％ of addiction group, 58.0％ of intermediate group, and 32.0％ of nonaddiction group. There were significant differences in family environment score(F=25.09, p=.0001) and school adjustment score(F=34.46, p=.0001) regarding internet addiction degree. The relationship among internet addiction score, family environment score and school adjustment score revealed a significant inverse correlation(r=-0.32, p=.0001, r=-0.35, p=.0001). And the relationship between family environment score and school adjustment score revealed a significant correlation(r=0.52, p=.0001). Conclusion: The degree of school children's internet addiction has been found to be very high and correlated to the family environment and school adjustment. Therefore, programs should be developed in order to improve this situation.

• 한국건설관리학회논문집
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• 제15권1호
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• pp.70-77
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• 2014

건설프로젝트의 성공적인 수행을 위해 의사소통, 협력, 정보공유 등을 포함한 구성원들 간의 협업은 반드시 필요하다. 그러나 프로젝트 조직 내의 협업과정이 성과에 미치는 영향에 대한 분석적인 시도는 부족하였다. 본 연구는 게임이론 기반의 에이전트기반 시뮬레이션을 활용하여 프로젝트 조직 내 협업과정을 보다 명시적으로 이해하는 방법을 제시하였다. 시뮬레이션의 결과로 구성원수준에서의 관계형성과 조직수준에서의 네트워크 발전양상을 관찰할 수 있었다. 본 연구는 프로젝트조직 내의 협업과정 분석방법 개발을 위한 기초연구이며, 향후 연구를 통해 조직 내 업무수행 프로세스, 생산작업 프로세스, 관리 프로세스 등의 부분과 결합하여 프로젝트 성과를 예측하는 방법으로 발전될 수 있을 것이다.

• 한국실천공학교육학회논문지
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• 제2권1호
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• pp.64-70
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• 2010

본 연구는 학생들이 온라인 환경에서 정보시스템을 활용하여 효율적인 협동학습을 수행하는 방법을 이해하고자 한다. 이러한 연구목적을 달성하기 위하여 분해된 계획 행동 이론(Decomposed TPB)을 기반으로 하여, 학생들의 웹기반 협동학습시스템의 사용의도에 영향을 미치는 5개의 중요한 요인을 도출하였다: 명시적 사회적 영향, 암시적 사회적 영향, 지각된 유용성, 지각된 용이성, 지각된 흥미성. 본 연구모형은 2개 대학의 대학생 254명을 대상으로 TOEIC콘텐츠를 공부하는 온/오프라인의 가상적인 스터다그룹을 구성하여 협동학습을 수행하도록 하고, 이에 대한 자료를 세 차례의 설문을 통하여 수집하여 분석하였다. 연구결과는 다차원으로 분해된 변수들 중 태도적 믿음 변수인 지각된 용이성을 제외하고 분해된 모든 변수가 사용의도에 긍정적 강한 영향을 미치고 있음을 알 수 있었고, 특히, 웹기반 협동학습지원시스템의 다양한 기능(협동학습을 통한 화상토론, 게시판활동, 오프라인 정기 모임, 동영상 동시 시청)을 통하여 팀장과 팀원들의 상호작용과 함께 사용의도에도 직접적 영향을 줄 수 있기 때문에 명시적 사회적 영향, 암시적 사회적 영향 변수는 준거집단을 통해서 웹기반 협동학습 시스템에 대한 행동의도나 인지에 영향을 줄 수 있는 중요 변수로 나타났다.

• 융합정보논문지
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• 제12권5호
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• pp.212-224
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• 2022

30~59세 여성의 자기애에 따른 홈케어 뷰티디바이스 이용 태도 연구로 뷰티디바이스 산업 기초자료를 제공하고자 한다. 설문 563부 통계 결과 첫째, 대상자의 연령, 학력, 결혼상태, 생활수준, 직업은 내현적 자기애 차이 유의성을, 외현적 자기애에서는 연령, 직업만 유의하였다. 피부 건강관리 장소는 '홈케어 자가 방법'이, 구매 경험 기기는 '갈바닉기기'로 나타났다. 둘째, 내현적 자기애에 따른 홈케어 뷰티디바이스 이용 태도는 구매 경험만 유의하였고, 외현적 자기애에서는 구매 경험, 타인 추천 의향이 유의 결과를 보였다. 성격 특성인 자기애에 따른 홈케어 뷰티디바이스 이용태도에 관한 연구가 처음이었다는데 의의가 있으나, 향후 연구는 광범위한 지역과 연령층 및 남성 대상의 폭 넓은 연구가 필요하다.

• 대한수학교육학회지:학교수학
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• 제5권3호
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• pp.361-384
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• 2003

본 연구는 연립일차방정식에 관한 문장제에서 IDEAL 문제 해결 모형을 바탕으로 "구조-표현"을 강조한 교수-학습을 실시하였을 때 학생들의 문제해결 과정을 탐구하였다. 연구 결과, 구조-표현을 강조한 학급의 학생들이 이를 강조하지 않은 학급의 학생들보다 문제해결 능력이 향상되었으며, 동치문제, 동형문제, 유사문제를 더 정확하게 구별하였다. 또한, 구조-표현을 강조한 학급의 학생들이 그렇지 않은 학급의 학생들보다 문맥에 대한 이해 및 불완전한 정보 추출에서의 오류, 미지수간의 내적 관계에 대한 수학적 기호표현으로의 불완전한 전이 오류, 적절하지 않은 방정식 생성 오류의 발생 빈도가 적었다. 그리고, IDEAL 문제 해결 모형의 문제의 확인 단계(I)와 문제의 정의 단계(D)에서 학생들이 문제 해결 계획을 수립하기 위해 문제를 읽고 이해하여 문제를 해결하는 과정을 중점적으로 분석한 결과, 직접 변환 모델과 구조 도식 모델이 나타났다.

• 대한기계학회논문집A
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• 제22권3호
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• pp.483-492
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• 1998

An inverse analysis been applied to obtain the flow stress of the material. In this method, a ring-shaped specimen is compressed between two flat tools. This procedure employs, as the object function of inverse analysis, the balance of measured loads and reaction forces calculated by using rigid-plastic finite element method. The balance is explicit scalar function of flow stress which is a function of some unknown constants. For minimizing the balance, Newton-Raphon scheme is used. The friction factor, m, between flat tools and the specimen is determined by using friction area-divided method. The proposed method allows an accurate identification by avoiding the usual assumptions made in order to convert experimental measures into stress-strain relation. In this paper, the proposed method is numerically tested. A commercial pure aluminum was selected, as an example, to apply the method and the results are compared with stress-strain relation obtained by experiments.

• Nuclear Engineering and Technology
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• 제51권1호
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• pp.13-30
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• 2019

This paper presents the recent improvements in the DeCART code for HTGR analysis. A new 190-group DeCART cross-section library based on ENDF/B-VII.0 was generated using the KAERI library processing system for HTGR. Two methods for the eigen-mode adjoint flux calculation were implemented. An azimuthal angle discretization method based on the Gaussian quadrature was implemented to reduce the error from the azimuthal angle discretization. A two-level parallelization using MPI and OpenMP was adopted for massive parallel computations. A quadratic depletion solver was implemented to reduce the error involved in the Gd depletion. A module to generate equivalent group constants was implemented for the nodal codes. The capabilities of the DeCART code were improved for geometry handling including an approximate treatment of a cylindrical outer boundary, an explicit border model, the R-G-B checker-board model, and a super-cell model for a hexagonal geometry. The newly improved and implemented functionalities were verified against various numerical benchmarks such as OECD/MHTGR-350 benchmark phase III problems, two-dimensional high temperature gas cooled reactor benchmark problems derived from the MHTGR-350 reference design, and numerical benchmark problems based on the compact nuclear power source experiment by comparing the DeCART solutions with the Monte-Carlo reference solutions obtained using the McCARD code.

• Steel and Composite Structures
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• 제42권1호
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• pp.123-137
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• 2022

The fundamental period (FP) is one of the most critical parameters for the seismic design of structures. In the reinforced concrete (RC) infilled frame, the infill walls significantly affect the FP because they change the stiffness and mass of the structure. Although several formulas have been proposed for estimating the FP of the RC infilled frame, they are often associated with high bias and variance. In this study, an efficient soft computing model, namely the group method of data handling (GMDH), is proposed to predict the FP of regular RC infilled frames. For this purpose, 4026 data sets are obtained from the open literature, and the quality of the database is examined and evaluated in detail. Based on the cleaning database, several GMDH models are constructed and the best prediction model, which considers the height of the building, the span length, the opening percentage, and the infill wall stiffness as the input variables for predicting the FP of regular RC infilled frames, is chosen. The performance of the proposed GMDH model is further underscored through comparison of its FP predictions with those of existing design codes and empirical models. The accuracy of the proposed GMDH model is proven to be superior to others. Finally, explicit formulas and a graphical user-friendly interface (GUI) tool are developed to apply the GMDH model for practical use. They can provide a rapid prediction and design for the FP of regular RC infilled frames.

• Journal of applied mathematics & informatics
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• 제32권1_2호
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• pp.17-26
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• 2014

In this paper, we present an algorithm for computing the number of points on the Jacobian varieties of genus 3 hyperelliptic curves of type $y^2=x^7+ax$ over finite prime fields. The problem of determining the group order of the Jacobian varieties of algebraic curves defined over finite fields is important not only arithmetic geometry but also curve-based cryptosystems in order to find a secure curve. Based on this, we provide the explicit formula of the characteristic polynomial of the Frobenius endomorphism of the Jacobian variety of hyperelliptic curve $y^2=x^7+ax$ over a finite field $\mathbb{F}_p$ with $p{\equiv}1$ modulo 12. Moreover, we also introduce some implementation results by using our algorithm.