• Proceedings of the Korea Information Processing Society Conference
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• 2010.11a
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• pp.1839-1842
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• 2010

등각사상은 함수론의 기본적인 문제로 2차원 Laplace방정식이 나타나는 열전도, 정전(靜電) potential, 유체의 문제에 이용되는 등 공학이나 물리학에서 그 응용분야가 넓다. 수치등각사상의 목적은 보다 빠르고, 보다 정확하며, 보다 적용범위가 넓은 계산법을 연구하는데 있다. 단위원 내부로부터 Jordan 영역 내부로의 등각사상을 구하는 문제는 비선형 방정식인 Theodorsen 방정식을 푸는 것으로 귀결된다. Theodorsen 방정식에 관해서는 여러 가지 수치해법이 제안되어 있는데 본 논문에서는 그 중 SOR 법인 Niethammer와 Newton법인 Vertgeim의 방법을 다루어 비교, 분석하였다. 이 2가지 방법을 실제 계산기상에 실현시켜 수치실험을 하여 그 유효성을 비교, 분석한 결과 난이도가 낮은 문제에서는 Niethammer의 방법이 난이도가 높은 문제에서는 Vertgeim이 제안한 방법이 유효함을 알게 되었다.

• Korean Journal of Cognitive Science
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• v.16 no.4
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• pp.287-303
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• 2005

This study examined the effect of cognitive ability levels on skill acquisition and transfer as a function of training difficulty. Participants were classified into three groups based on the result of cognitive ability tests. They were trained with difficult or easy tasks and then transferred to novel difficult tasks. Results suggest that cognitive ability levels influenced training performance, though the effect of training difficulty on transfer performance varied with cognitive ability. The training difficulty was most effective for those who have the medium level of cognitive ability. These results were discussed with respect to individual differences and skill transfer performance.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.27 no.3
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• pp.51-73
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• 2016

This study analyzes on the perception of public librarians about lifelong education tasks in public library using Mann Whitney U-test, Spearman rank-order correlation coefficient, Multiple regression analysis. At the same time, analysis about re-education needs using Analytic Hierarchy Process is conducted. As result, at first, 87% of respondents feel moderate or difficult about lifelong education tasks, especially on planning task. At second, librarians who have qualification about lifelong educator feel easier (P=0.04) than others, in detail, task about lecturer liaison (P=0.04) and planning (P=0.05). Adding that, the career experience and the job difficulty of librarians has negative relationship (R=-0.217). Especially scheduling (R=-0.33) and progressing (R=-0.22) tasks show statistically meaningful. At third, as the result of Multiple regression analysis, tasks about planning (P=0.04) and library marketing (P=0.05) are selected as meaningful elements which effect overall difficulty of life long education job. As final, 91% of librarian need retraining for life long education function, as result of spearman (R=-0.210), the more librarians feels difficult about life long education jobs, the more they need retraining. Anyway, as the result of priority of retraining subjects through AHP technique, user communication (CU P=0.310), planning (PL P=0.246), library marketing (LM P=0.173) are in weight order. CR ratio shows 0.146 with permissible degree.

• Journal of Gifted/Talented Education
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• v.22 no.1
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• pp.117-139
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• 2012

This study compared the cognitive conflict on peer instruction concerning the level of difficulty in question, between middle school science gifted students and non-gifted students. For the study, 35 the 7th grade science-gifted students in the organization affiliated with Science Education Institute for the Gifted in Seoul and Gyeong-gi province, and 14 the 8th grade science-gifted students, and 71 the 8th grade students. They performed peer instruction on propagation of straight light and composition of light and then, discussed three concept problems. After discussing the students took paper pencil test about changing levels of cognitive conflict. Regardless of the level of difficulty in question, the science-gifted students showed meaningful decreased figures on cognitive re-evaluation factors after peer-discussion. They trusted their peers, so during discussion, they explained their concepts. Furthermore discussion process enabled them to do reflective thinking. consequently, discord of students dropped, and total figures of cognitive conflict also declined. Science-gifted students have a tendency to worry lower than general students, though they felt anxiety as difficulty of the problems after peer-discussion. Through peer-discussion, science-gifted students presented statically decreased anxiety factors. By means of analyzed results of changing cognitive conflict of science-gifted students, developing and adapting strategies of cognitive conflict considering learner characteristics of science-gifted students is needed.

• The Journal of Korean Association of Computer Education
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• v.10 no.4
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• pp.39-49
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• 2007

The purpose of this study is to provide analysis resources to develop high standard questions by analyzing item characteristics and item usability of 'Basic course of Information Technology' in the College Scholastic Ability Test, For the qualitative research, this paper analyzed content validity. For the quantitative research, this paper analyzed item difficulty, item discrimination, item reliability, and distracters. As a result of analyzing tests in 2005 and 2006, questions were equally extracted from educational contents. However, the standard of questions were in need of revision. The development of high quality contents in Vocational Education Section was needed in order to meet to the College Scholastic Ability Test standards. Therefore, it is required to develop various difficulties and acceptable distinguishable questions.

• The Journal of the Korea Contents Association
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• v.9 no.11
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• pp.363-375
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• 2009

This study is to verify effects of banner advertising by context effect in web contents. For this, it analyzed the effects of banner advertising by association of internet article's contents, emotion, difficulty of article and the level of involvement. According to the result of experimental design, banner advertising effects by context effects of web contents were high in the following cases; in the case when the contents were highly associated with banner advertising; in the case when the positive emotions were formed by the internet article; in the case when the difficultly of article was low; and in the case when consumer's involvement was high. And also, when the contents were highly associated with the advertising, the content effects of web contents were high even in the case when the negative emotions were formed; in the case when the difficulty of article was high; and consumer's involvement was low.

• Journal of the Korea Convergence Society
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• v.12 no.9
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• pp.93-98
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• 2021

The change of programming language learning experience on learning motivation was analyzed. Learning a programming language is generally evaluated as a difficult process even for majors. Measuring psychological changes related to programming learning at this point in expanding to non-majors is necessary for learner analysis. The overall learner attitude change was investigated by measuring achievement goals, academic interest, academic self-efficacy, cognitive involvement, and academic self-regulation, which are motivation-related factors. All factors related to learning attitude showed a decrease in the post-test results. This result is interpreted that the difficulty of the learning process decreased the motivation to learn programming. It was found that the greater the difficulty perceived by the learner, the greater the decrease in the motivation to learn. Based on the results of this study, it has implications that a learning environment and learning process that can give feedback and a situation that can reduce the level of learning difficulty felt by learners should be systematically given.

• Journal of The Korean Association of Information Education
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• v.15 no.4
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• pp.635-644
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• 2011

This research analyzed the brainwave activities and brain hemispherity to find out any implications to design the connections between the activities of the brain function and the computerized arithmetic addition in two difficulty levels: easy: 1-5 vs. hard: 6-9. Thus, in developing the brain based math learning for the computer education by implicit association test(IAT) indicated the significant results for the exclusive brain location and the brain hemispherity on the theta, alpha, low alpha, beta brainwaves by QEEG analysis. The results of this study physiologically supported the theoretical background for the computerized math learning skills as well as the math learning material development. It shows the difficulty levels of math information education and the brain activities on cognitive process of the learner continued on the possible investigation of the brain science.

• Journal of Navigation and Port Research
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• v.32 no.3
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• pp.207-213
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• 2008

Ship-handling simulation system has been used for maritime traffic safety assessment for harbor and fairway. There exist various environmental conditions under which ship may navigate along a fairway or in harbor. Due to the time and budget limitations, however, ship-handling simulations are usually carried out for very limited number of environmental conditions. In this paper, statistical method for effective and systematic determination of real time simulation conditions is suggested and applied to the maritime traffic safety assessment problems. In the empirical study, the principal component analysis method and the concept of empirical cumulative distribution function are suggested to estimate synthetic navigational difficulty and to select simulation conditions which would impose high difficulty on shiphandling.

• The Journal of Korean Academy of Sensory Integration
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• v.16 no.2
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• pp.26-35
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• 2018

Objective : The aim of this study was to investigate job tasks of Korean pediatric occupational therapists focusing on sensory integration intervention provided in hospitals, private centers, welfare centers, and to identify job differences depending on the types of agency. Methods : A survey was performed for 122 pediatric occupational therapists focused on sensory integration intervention by utilizing a questionnaire from July to September 2017. The questionnaire was consisted of job description for the pediatric occupational therapists. Results : There were differences in tasks' importances, frequencies, and difficulties according to the three type of agency. Differences were showed total 10 tasks in importance, total 7 tasks in frequency, and total 2 tasks in difficulty depending on the agency type. Conclusion : Occupational therapists need to identify job differences depending on agency type and to develop essential competencies required to perform the job tasks which emphasized at each agency.