• Aerospace Industry
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• v.85
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• pp.26-29
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• 2004

항공기는 수만개의 부품으로 구성된다. 그래서 인지 아주 작은 부품들은 쉽게 지나쳐 버리는 경우가 대부분이다. 일례로 유로파이터 타이푼과 같은 최신 전투기에 (주)한화에서 Manifold 기술력이 녹아 있다는 사실은 거의 알려지지 않고 있다. 이처럼 국내 항공기 개발 및 양산사업에서 축적된 기술과 경합들이 어느새 항공기 부품수출로 이어지고 있고 한화 항공우주사업이 이를 선도하고 있다.

• 기계와재료
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• v.2 no.2 s.4
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• pp.32-36
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• 1990

"산업의 공동화"-미국은 이미 겪었고 일본은 그 징후가 보인다고 불안해 하고 있지만 우리는 아직도 무감각한 상태이다. 구미제국은 정치력에 의한 부를 집약하고 그결과 기술이 번영하여 산업이 흥하였지만 지금의 우리는 정치력도 부존자원도 없는데 오직 기술력에 의존.산업을 부흥시키지 않으면 안된다. 이와같은 특수 여건속에서 "산업의 공동화"가 일어났을때 어떻게 될것인지 사전에 이를 분석, 그 문제점에 대한 대비가 있어야 할 것으로 생가한다.

• Communications of Mathematical Education
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• v.9
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• pp.187-201
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• 1999

본 논문에서는 사회적 구성주의(social constructivism) 관점에서 고등학교 수준에서의 수학적 모델링 (mathematical modelling) 자료를 개발, 적용, 활용함으로써 학교수학과 실생활 문제를 관련시켜 학생 스스로 관찰 ${\cdot}$ 해석 ${\cdot}$ 사고 ${\cdot}$ 분석하여 구조화하는 고차원적인 인지능력의 형성과 문제 해결력을 배양할 수 있는 학습방법을 고찰한다.

• Journal of the Korean Home Economics Association
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• v.44 no.12
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• pp.19-30
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• 2006

The present study investigated the effects of children's cognitive styles on their interpersonal problem solving performances. It examined closely whether children's interpersonal problem solving performances differed depending on their individual cognitive styles such as field independence-field dependence and reflection-impulse cognitive styles. It also examined whether children's interpersonal problem solving performances differed depending on the subjects children interacted with. The subjects were 80 5-and 6-year-old children from three child care centers. Collected data were analyzed with SPSS Win 10.0 and processed statistically using average, standard deviation, and repeated measures design. Children's interpersonal problem solving performances showed differed according to the subjects they interacted with. Children showed better interpersonal problem solving performances with their peers than with adults like teachers or parents. There was a significant positive correlation between children's field independence-field dependence cognitive styles and interpersonal problem solving performances. That is, the more independent children were, the higher their interpersonal problem solving performances were. In addition, there was a partially negative correlation between children's reflection-impulse cognitive styles and interpersonal problem solving performances. The more impulsive children were, the lower the problem solving performances were.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.112-114
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• 2016

Big data analysis refers the ability to store, manage and analyze collected data from an existing database management tool. Meta-analysis refers to a statistical literature synthesis method from the quantitative results of many known empirical studies. We conducted a meta-analysis and review of between external factors on perceived value in e-commerce researches. This study focused a total of 11 research papers that established causal relationships between external factors on perceived value in e-commerce published in Korea academic journals during 2000 and 2016. Based on these findings, several theoretical and practical implications were suggested and discussed with the difference from previous researches.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.8
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• pp.3748-3759
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• 2013

The purpose of this study was to examine the classification accuracies of ML, MAP, and EAP methods under DINA model. For this purpose, this study examined the classification accuracies of the classification methods under the various conditions: the number of attributes, the ability distribution of examinees, and test length. To accomplish this purpose, this study used a simulation method. For the simulation study, data was simulated under the various simulation conditions including the number of attributes (K= 5, 7), the ability distribution of examinees (high, middle, low), and test length (J= 15, 30, 45). Additionally, the percent of agreements between true skill patterns(true ${\alpha}$) and skill patterns estimated by the ML, MAP, and EAP methods were calculated. The summary of the main results of this study is as follows: First, When the number of attributes was 5 and 7, the EAP method showed relatively higher average in the percent of exact agreement than the ML and MAP methods. Second, under the same conditions, as the number of attributes increased, the average percent of exact agreement decreased in ML, MAP, and EAP methods. Third, when the prior distribution of examinees ability was different from low to high under the conditions of the same test length, the EAP method showed relatively higher average in the percent of exact agreement than those of the ML and MAP methods. Fourth, the average percent of exact agreement increased in all methods, ML, MAP, and EAP when the test length increased from 15 to 30 and 45 under the conditions of the same the ability distribution of examinees.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.12 no.1
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• pp.10-19
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• 2018

The present study was to investigated the effects of motion-based virtual reality training on cognitive function and activities of daily living in patients with stroke. This study was participated in forty one patients with acute stroke. All subjects were randomly assigned into either the experimental group(n=20) or the control group(n=21). The both groups received the conventional occupational therapy during 30 min a day, 5 a week, 4 a weeks. Additionally, experimental group performed motion-based virtual reality training on each session during 30 min/day, and control group conducted conventional occupational therapy on each session during 30 min/day. The outcome measures were the LOTCA(Loewenstein Occupational Therapy Cognitive Assessment), TMT(Trail Making Test), VM(Visual Memory), K-MBI(Korean Modified Barthel Index). In comparison of change score of cognitive function, the experimental group showed a significantly greater improvements in attention and visual working memory than the control group(p<.05). As a result for change score of activities of daily living, the experimental group showed a significant greater improvement in self care than the control group(p<.05). Our findings suggest that motion-based virtual reality training may have a effects of the improvements of cognitive function and activities of daily living than conventional therapy in patients with acute stroke.

• Journal of Digital Convergence
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• v.18 no.9
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• pp.441-451
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• 2020

The study was conducted with the aim of identifying the impact of competition anxiety on dance immersion and performance in high school students majoring in dance. As of 2020, online surveys were conducted on students majoring in dance at high schools in Seoul and the metropolitan area. A total of 222 people's data were processed by applying t-test, one-way variable analysis, correlation and multiple regression analysis through SPS 18.0 for Windows, resulting in the following conclusions. First, male students were more confident in their condition than female students, and students who recognized that their family's economic power was in the middle class were more aware. In addition, it was found that the group perceived that economic power was at the top of the list was higher than the median. Second, cognitive anxiety and self-confidence have been shown to have a static effect on immersion into dance. Third, cognitive anxiety and self-confidence have been shown to have a static effect on the achievement of uselessness. Fourth, immersion in dance appeared to be a powerful parameter related to competition anxiety and achievement of dance. To sum up the above conclusions, competition among high school students majoring in dance has been shown to increase their performance by immersing themselves in dance, but further studies of these psychological variables are expected to have side effects.

• Journal of Applied Biological Chemistry
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• v.64 no.3
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• pp.299-307
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• 2021

Accumulation of amyloid beta (Aβ) and oxidative stress are the most common reason of Alzheimer's disease (AD). In the present study, we investigated the cognitive improvement effects of butanol (BuOH) fraction from Momordica charantia in Aβ_25-35-induced AD mouse model. To develop an AD mouse model, mice were received injection of Aβ_25-35, and then orally administered BuOH fraction from M. charantia at doses of 100 and 200 mg/kg/day during 14 days. In the T-maze and novel object recognition test, administration of BuOH fraction from M. charantia L. at doses of 100 and 200 mg/kg/day improved spatial ability and novel object recognition by increased explorations of novel route and new object. In addition, BuOH fraction of M. charantia-administered groups improved learning and memory abilities by decreased time to reach hidden platform in Morris water maze test. Oral administration of BuOH fraction from M. charantia significantly inhibited lipid peroxidation and nitric oxide levels in the brain, liver, and kidney compared with Aβ_25-35-induced control group. These results indicated that BuOH fraction of M. charantia improved Aβ_25-35-induced cognitive impairment by attenuating oxidative stress. Therefore, M. charantia could be useful for protection from Aβ_25-35-induced cognitive impairment.

• Journal of Digital Convergence
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• v.19 no.11
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• pp.615-623
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• 2021

The purpose of this study was to identify the factors influencing resilience of patients with systemic lupus erythematosus. The subject(N=118) was a systemic lupus erythematosus patient who visited the E hospital in D city. The collected data were analyzed by descriptive statistics, t-tset, ANOVA, pearson correlation, and multiple regression. As a result of the study, impact domain of uncertainty, fatigue, self-management domain of uncertainty, trust in doctors domain of uncertainty significant effects on resilience. Based on this study, in order to improve the resilience of patients with systemic lupus erythematosus, a multifaceted approach is needed to reduce the uncertainty perceived by the patient and control fatigue. In addition, it is required to develop an effective nursing intervention program to enhance resilience reflecting influencing factors.