• Journal of Engineering Education Research
• /
• v.13 no.6
• /
• pp.164-170
• /
• 2010

This article explores the effects of the RBI(Robot Based Instruction) for promotion of students' interaction in elementary school. It was found that Cognitive Affective Metacognitive interaction is evenly spread in RBI. It was particularly high the ratio of metacognitive interaction. According to the analysis result of learner's activity by the detailing, it was observed that robot media promoted students' interaction. Also, metacognitive interaction about clarification and elaboration was promoted lively in the RBI situation. Therefore, RBI was helpful to promote of students' interaction in elementary school.

• Korea Science and Art Forum
• /
• v.31
• /
• pp.105-118
• /
• 2017

The purpose of study is to examine the effectiveness of exhibition sales promotions and purchase intention for reasonable visitors. Perceived behavior control determining moderating effects on the relationship among their sales promotions and purchase intention is used as a predictive variable of unexpected impulsive purchases or negative purchase intention contrary to business intention. A total of 315 visitors who experienced the sales promotions of G-Star 2016 in Busan respond to the questionnaire and 259 forms are used to analyze the data. The main results of this study were as follows. First, except to value-added sales promotion, all of sales promotions positively impact on visitors' purchase intention. Second, as a result of analyzing the moderating effects of the perceived behavioral control consisting of control belief and perceived power on the relationships among the sales promotions and purchase intention, the control belief moderated the sales promotions such as price-off and education on purchase intention. In addition, the perceived power moderated the sales promotions such as escape and entertainment on purchase intention. In a nutshell, the degree of perceived behavior control makes critically impact on the effectiveness of exhibition sales promotions. Based on this results, it yields new insights into the way of developing various sales promotion strategies according to different features of visitors.

• Journal of Practical Agriculture & Fisheries Research
• /
• v.17 no.1
• /
• pp.145-155
• /
• 2015

To investigate the practicality of a small scale softwood propagation plastic film tent and the rooting promoting effect of indole-3-butyric acid(IBA) for northern highbush blueberry, softwood cuttings of 3 varieties (Duke, Elizabeth, Elliot) were made after dipping in the IBA solutions of 100ppm, 300ppm, 500ppm, 1,000ppm for 2 hour, and 3,000ppm for 20 seconds, respectively. Two-way ANOVA confirmed the significant differences in the percentage of rooting of cutting, longest root length and rooting volume index (RVI) induced by IBA treatment, as well as the percentage of rooting of cutting and RVI among examined varieties. In particular, the highly significant difference was observed in th RVI for IBA treatment. However, there was no interactions between the auxin treatments and varieties. Spontaneous rooting ability (control) depends on the varieties, showing that the lowest rooting ability was observed in the 'Duke' (45%) followed by 'Elliot'(85%) and 'Elizabeth' (90%). In addition, the rooting of the examined 3 varieties were enhanced by both of short time (20sec) dipping treatment of low level solutions, and long time (2hr) dipping treatment of high level solution, with the remarkably promoted rooting of the 'Duke' cuttings.

• Journal of Korea Technology Innovation Society
• /
• v.20 no.3
• /
• pp.546-575
• /
• 2017

This paper investigates the effects of public R&D support on medium-sized firms' R&D investment. The paper collects a panel dataset of Korean manufacturing firms' R&D investment and public support, and employs the DID (difference-in-differences) regression for the test of stimulating or crowding-out effect. Empirical analysis examines how the effect of public R&D support differs between small and medium-sized firms and whether firm size and technological capability moderate the effect in the sample of medium-sized firms. Empirical results show that public R&D support tends to generally stimulate private pure R&D investment for both small and medium-sized firms. Comparing the results for small and medium-sized firms, this paper finds that the stimulating effect is relatively larger and more significant for medium-sized firms, while the effect is not significant for small ones. Furthermore, the paper shows that the stimulating effect of public R&D subsidy on private R&D investment is relatively stronger for medium-sized firms with superior technological competence and the effect of tax support is greater for incompetent firms. These results suggest that public R&D policies and R&D programs, differentiated from those for existing small firms, are necessary for medium-sized firms to stimulate private R&D continuously and formulated carefully by considering firm size, technological capability and growth potential.

• Proceedings of the Korea Contents Association Conference
• /
• 2015.05a
• /
• pp.215-216
• /
• 2015

연구의 목적은 이러닝 학습환경에서 학습자들의 학습 참여를 촉진할 수 있는 시각적 스캐폴딩을 개발하고 그것이 학습참여, 개별학습, 팀프로젝트학습에 미치는 교육적 효과를 분석하고자 한다. 시각적 스캐폴딩에는 개별 참여도, 팀 참여도, 팀활동에 대한 개인 기여도, 팀간 상호작용 정도가 표상되도록 설계하였다. 시각적 스캐폴딩의 교육적 효과는 실험연구를 통해 분석되었다. 연구결과 이 연구를 통해 개발된 시각적 스캐폴딩은 학습참여도 및 학습성과에 긍정적인 영향을 미치는 것으로 분석되었다.

• Annual Conference on Human and Language Technology
• /
• 2005.10a
• /
• pp.57-62
• /
• 2005

한국어 명사 어절의 시간 경과에 따른 처리 양상을 확인해 보기 위하여 점화어절판단과제(primed eojeol decision task)를 이용한 실험을 실시하였다. 점화어 제시 방식은 차폐점화, SOA 100ms, SOA 300ms 조건으로 하였으며, 점화어-표적어의 관계는 어절일치, 어간일치, 통제조건으로 조작하였다. 그 결과 어절일치조건과 어간일치조건에서 촉진효과가 있었으며, SOA가 증가함에 따라 어절일치조건과 어간일치조건에서의 촉진효과도 함께 증가하는 양상을 확인하였다. 점화어의 제시 방식과 점화어-표적어의 관계간의 상호작용도 유의미하였다. 이러한 결과를 바탕으로 심성어휘집에서의 어절 표상의 실재성과 어절 속성과 어간 속성이 어절 처리 과정에 관여하는 방식에 관하여 논의하였다.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.42 no.7
• /
• pp.1015-1021
• /
• 2013

Glycyrrhiza inflata Batal, an important species of licorice, is one of the most widely used medicinal plants for over 4000 years. Glycyrrhiza plant species has been well known for its various therapeutic activities such as anti-inflammatory, anti-allergic, and anti-ulcer. The purpose of this study was to determine the effects of Glycyrrhiza inflata Batal ethanol extracts (GBE) on adipocyte and osteoblast differentiation. Mesenchymal C3H10T1/2 cells were treated with sub-cytotoxic doses of GBE, and its effects on adipocyte differentiation were assessed. We found that GBE dose-dependently increased lipid accumulation and also induced the expression of adipocyte markers, such as $PPAR{\gamma}$ and its target genes, aP2, and adiponectin, in C3H10T1/2 cells. Consistently, similar effects of GBE on lipid accumulation were also observed in preadipocyte 3T3-L1 cells that further supports the pro-adipogenic activities of GBE. We also investigated the effects of GBE on osteoblast differentiation of mesenchymal C3H10T1/2 cells. As a results, we found that GBE increased the activity of alkaline phosphatase in a dose-dependent manner and also promoted the expression of osteoblast markers, such as ALP and RUNX2, during osteoblast differentiation of C3H10T1/2 cells. Similar pro-osteogenic effects of GBE were also observed in preosteoblast MC3T3-E1 cells. Finally, our data show that a major bioactive compound found in Glycyrrhiza inflata Batal, licochalcone A (LA) but not glycyrrhizic acid (GA), can mediate the pro-adipogenic and pro-osteogenic effects of GBE. Taken together, this study provides data to show the possibility of GBE and its bioactive component LA as putative strategies for type 2 diabetes and bone diseases.

• Proceedings of the Membrane Society of Korea Conference
• /
• 1993.10a
• /
• pp.26-29
• /
• 1993

Perfluorosulfonate Ionomer는 다음과 같은 화학구조를 갖고 있으며(그림 1) 대표적인 예는 DuPont사의 Nafion이다. Nafion은 불소화합물의 고유한 특성 때문에 내약품성과 내용매성이 뛰어나다. Nafion막의 sulfonic acid기를 EDA로 치환하므로써 이산화탄소 및 메탄의 혼합물 분리에서 이산화탄소의 촉진수송현상을 발견하였으며, 매체의 종류에 따른 촉진수송현상에 대한 영향을 연구하였다. 투과도를 증가시키기 위해서는 이산화탄소의 투과도가 가장 우수한 매체 즉 메탄을 사용해야하나 촉진수송효과는 대신 매우적다. 그리고 선택도를 증가시키기 위해서는 이산화탄소와 운반체인 EDA와의 산-염기의 친화력을 극대화 시킬 수 있는 매체인 물을 사용하여야 한다.

• Journal of the korean veterinary medical association
• /
• v.39 no.4
• /
• pp.351-360
• /
• 2003

성장촉진용 호르몬제제는 생체에서 근육단백질 합성 증가, 성장촉진 효과를 발휘하는 생리활성 물질로 정상적인 분비과정을 통하여 생성되는 천연호르몬과 화학적으로 제조된 합성호르몬으로 대별된다. 주요 육류수출국에서는 가축의 생산성 향상을 목적으로 성장촉진용 호르몬제제의 불법적인 오$\cdot$남용이 성행하여 식육중에 잔류되는 문제를 일으키고 있다. 축산물중 성장촉진용 호르몬 제제의 잔류방지를 위해서는 축산현장에서 사용되는 동물용 의약품의 용법, 용량을 정확히 지키고 휴약기간을 준수하는 자세가 관건이며 이를 위하여 수의사의 적극적인 계도와 홍보가 절실히 필요하다.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.12
• /
• pp.43-48
• /
• 1972

The present experiments were carried out to find out the proper concentration of CEPA(2-chloroethy-lphosphonic acid) for the purpose of accelerating the leaf maturity and of reducing the nicotine content of tobacco. Varried levels of CEPA were sprayed Yellow Special A right after topping. The effects of each level CEPA treatment on leaf ripening and total alkaloid contents were periodically observed. The results are summarized as follows; 1. The higher the CEPA concentration was, the more the leaf maturity was accelerated. During the period from six to 11 days after treatment, the differences of leaf maturity among levels were prominent. 2. Treatment with CEPA only on the upper surface of the tobacco leaf, accelerated the maturity of that particular part treated, but not apparently the other parts of leaf. 3. The higher the CEPA concentration was, the more the accumulation of the total alkaloid was reduced. The reduction of alkaloid accumulation was evident after acceleration of leaf maturity. 4. Distinctive acceleration of leaf maturity was observed in the fully developed lower leaves, while reduction of alkaloid accumulation in the growing upper leaves. The degree of total alkaloid content reduced in the ripened leaves, however, were similer to all the leaves at different positions. 5. Yields of tobacco leaves were not significantly affected by CEPA treatment. 6. In the present experiments, it may be concluded that CEPA2, 000ppm is the most applicable level for accelerating leaf maturity and decreasing total alkaloid content. In the view point of the practical use, however, the applicable level is assumed to be properly choosed between 500 to 2, 000ppm, depending on the situations. 7. The mechanism of accelerating maturity and reducing alkaloid accumulation of tobacco leaves by CEPA, is further to be explored.