• Proceedings of the Korea Inteligent Information System Society Conference
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• 2002.11a
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• pp.220-229
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• 2002

협력적 추천 기법은 유사한 이웃의 선호도를 이용하여 고객에게 개인화된 아이템을 추천해 주는 방법으로 비교적 높은 정확도를 보이며 추천 시스템의 중심으로 연구되어져 왔다. 그러나, 지금까지의 추천 시스템은 도메인의 특성을 제대로 고려하지 못한채 추천을 시행함으로써 특정 도메인에서 추천의 정확도가 떨어지는 문제점이 발생하였다. 이러한 문제점들을 보완하기 위하여 본 논문에서는 평균 고객 유사도, 평균 아이템 유사도, 밀집도 등의 추천 선행 평가 척도를 제안하고, 추천 선행평가 척도와 추천의 정확도와의 상관관계를 보이며, 이를 이용하여 짧은 수행시간 안에 추천 적용이 가능한 마케팅 도메인 및 고객군을 선정하는 방법을 제시한다.

• Korean Journal of Logic
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• v.16 no.1
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• pp.17-43
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• 2013

Recently Byeong-Uk Yi has attempted to provide a novel solution to the paradox of before-effect by arguing that, upon drawing our attention to the notion of collective causation, we realize that there is a straightforward solution to the paradox. My aim in this paper is to show that Yi's solution fails. To this end, after making explicit two sources of the puzzlement in the paradox of before-effect, I set two requirements one must meet to resolve the paradox. And I argue that Yi's solution cannot meet both requirements at the same time.

• The Journal of the Korea Contents Association
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• v.14 no.11
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• pp.915-929
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• 2014

The purpose of this study was to explore organizational justice (distributive, procedural, and interactional justice) as the antecedent of and career satisfaction by conducting an integrative literature review. In addition, this study aimed to identify organizational support for career development (i.e., organizational sponsorship) as the potential mediating variable between organizational justice and career satisfaction. Based on an integrative literature review of previous research, this study proposed the conceptual model on the relationship between organizational justice and career satisfaction along with organizational support for career development. According to the conceptual model, organizational justice can add to the pool of important antecedents of career satisfaction, and organizational support for career development could mediate the relationship between organizational justice and career satisfaction. This study contributed to the human resource development (HRD) field through investigating the relationship between organizational justice and career satisfaction in a career development context in the workplace. Further, this study provided additional theoretical backgrounds to conduct organizational justice related research on diverse factors, such as potential mediating variables, influencing career satisfaction.

• Journal of the Korea Convergence Society
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• v.11 no.9
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• pp.385-393
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• 2020

The purpose of this study was performed to analyze the trend of foot reflexology and effectiveness. This study analyzed 118 articles published over 20 years on the effect of intervention therapy. Year of presentation, type of research, characteristics, results of intervention variables, and so on of preceding papers on foot reflexology were analyzed. Collected data were analyzed using SPSS/PC Ver. 26.0 statistical program. Results of this study confirmed that foot reflexology therapy was effective in psychological state, physical state, body systems, vital signs, lipids, and blood. Results of this study could be used as basic data for the development of interventional methods of foot reflexology for human health.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.15 no.1
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• pp.77-86
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• 2016

Drivers can receive diverse types of traffic information through a number of methods. However, there are not enough information services considering human factors. In this study, as a basic research on human factors of the drivers, characteristic analysis on drivers' mean glance (fixation) durations with different running speeds on the expressway was performed under diverse running environments. To control variables other than running speeds, running environments were categorized into 4 types: 'daytime running without preceding vehicles', 'daytime running with preceding vehicles', 'nighttime running without preceding vehicles', and 'nighttime running with preceding vehicles'. Furthermore, ANOVA Test was used to divide speed groups. As a result of performing a multiple comparison to compare differences in glance behavior per each group, the road item and the preceding vehicles item showed an increase in mean glance durations as the speed increased, while the front view showed a decrease in mean glance durations. It was confirmed that the road sign showed no statistically significant difference in glance durations as the speed varied.

• Journal of The Korean Association of Information Education
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• v.15 no.2
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• pp.189-199
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• 2011

The purpose of this study is to verify the effects of the advance organizer in programming class on elementary school students' logical thinking ability and self-efficacy. We developed our teaching-learning materials of programming for this purpose, Further, they are applied to the elementary school, and their effects are analyzed. Fourth grade students in elementary school were selected for the experiments of this study, For comparison, they were divided into a control group who taught by a traditional programming teaching method and an experimental group who taught by our advance organizer programming class. As a result, through before-and-after t-verifications performed on the experimental group and the control group respectively, we found statically significant differences between the two groups, and the effectiveness of our new programming teaching method was proved in both learner's self-efficacy and logical thinking ability.

• Korean Journal of Construction Engineering and Management
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• v.5 no.2 s.18
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• pp.194-201
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• 2004

Core-wall construction method is applied in many high-rise building constructions. This is caused by the advantages of the method such as the effect of saved construction cost and shortened period. However, the analysis study of planning practice for core-wall construction shows matters take place during core-wall construction, such as increasing in construction cost and period. These matters result from the limited work space leading to low productivity, the activity interference leading to increasing in period, additional temporary work cost and time, and delayed concrete pour activity. A large part of these can be prevented taking place by very detailed and most careful core-wall construction plan. Therefore, this study suggests improvement directions of core-wall construction planning process focused on the cooperation system of a contractor between a sub-contractor and the process.

• Korea Trade Review
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• v.42 no.3
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• pp.143-172
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• 2017

Chinese consumers get more interests in the brands which show the consumers with th trust rather than the those which provide consumers with excessive information on brand. Accordingly, this study aimed to find out that the antecedents of brand authenticity such as brand consistency, continuity, individuality, authority, ethics affect the brand aura through brand authenticity and surveyed data from a total 400 Chinese consumers for the analysis. As a result, this article is summarized as followings. First, brand continuity, individuality, authority affected brand authenticity but brand consistency and ethics did not have a direct effect on brand authenticity. Second, brand authenticity had positive effect on brand aura. This study provides information on the antecedents of brand authenticity of Chinese consumers. Further, it will provide meaning suggestion point of the importance of brand authenticity in establishing of brand aura.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.43 no.4
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• pp.413-420
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• 2023

Among the seismic structures for reducing earthquake damage, the seismic control structure is a technology that can efficiently improve seismic performance and secure economic feasibility by simply applying a damper. However, existing dampers have limitations in terms of durability due to required seismic performance and material plasticity. In this study, we proposed a polyurethane damper with enhanced recovery characteristics by applying precompression to polyurethane, which basically shows elastic characteristics, and applying superelastic shape memory alloy (SSMA). To verify the characteristics of the polyurethane damper, the concept was first established, and the design details were completed by selecting SSMA and steel, and selecting the precompression size as design variables. In addition, structural tests were conducted to derive response behavior and analyze force resistance performance, residual displacement, recovery rate, and energy dissipation capacity. As a result of the analysis, the polyurethane damper showed that various performances improved when the SSMA wire was applied and the precompression increased.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.350-350
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• 2021

한국건설기술연구원의 돌발홍수연구센터는 돌발홍수예측 시스템을 구축하여 2019년부터 전국에서의 돌발홍수정보를 제공하고 있다. 2019년에는 초단기 예측 모델인 Macgill Algorithm for Precipitation-nowcast by Lagrangian Extrapolation(MAPLE) 알고리즘으로부터 생산된 초단기 예측 강우를 활용하여 동(읍/면) 단위로 1시간 선행 예보를 제공하였다. 2020년에는 추가로 초단기 예측 강우와 수치예보 자료를 병합한 예측 병합 강우 자료를 생산하여 예측 선행시간을 1시간에서 3시간까지 확장하였다. 돌발홍수예측 시스템의 목표는 도시 및 산지소하천에서의 돌발홍수에 대응하기 위한 정보를 실시간으로 사용자에게 제공하여 수재해에 빠르게 대응하는 것이다. 이에 돌발홍수예측 시스템은 2019년부터 실시간으로 운영하여 홍수기에 보다 빠른 돌발홍수정보를 제공해왔다. 본 연구에서는 2020년 우기에 운영된 돌발홍수시스템에 대한 평가를 수행하였다. 이를 위해 부산(07.23), 대전(07.29), 서울(08.01), 경기-충북(08.02)에서 발생한 수재해 사례를 분석하였다.