• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.10a
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• pp.352-355
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• 2003

비자성이며 비전도성의 물리적 성질을 갖는 자연산 퀄쯔(quartz)와 용암석 스코리아를 대상으로 마그네타이징 처리를 하여 분석하였다. 마그네타이징 처리를 위하여 강력한 기계화학적 분쇄 반응을 시켰으며, 분쇄 반응시 알코올계의 솔벤트를 반응 용매로 사용하였다. 퀄쯔와 스코리아의 마그네타이징 처리에서 비교적 비중이 큰 퀄쯔의 경우와 비중이 작은 스코리아의 경우에도 분쇄된 분말이 물에 뜨는 것을 확인할 수 있으며, 친유성으로 기름에 대한 흡착 성질이 우수함을 확인하였다. 자연산 퀄쯔와 함께 스코리아를 바탕물질로 하여 기계-화학적 반응 기술로 고 분산성 흡착반응에 의한 고분자 물잘 생성을 유도하여 나노복합체를 제조하였다. 반응의 처리조건과 적용과정에 따라서 기계-화학적 반응을 통하여 얻어진 물질은 자기적 성질과 유전체 및 전기적 성질을 동시에 나타낸다. 부착성 융합 복합물질의 특징을 고려하여 시그니토마그네틱스(Segneto-magnetics)로 분류되는 합성분말은 특히 유류성분에 대하여 높은 흡착성을 가지며, 강한 자기적 성질을 띄는 10-50 nm 두께의 하나 또는 그 이상의 이질적 융합 화합물 층이 석영이나 수정체의 표면에 합성되어 특유의 자기, 전기적 성질을 나타낸다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.39 no.1
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• pp.227-237
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• 2019

In terms of the concept of space in urban planning and design, the modern city approaches from the perspective that all spaces are made up of different places based on identity. In this study, we analyzed disparate image by paying attention to the difference between the individual spaces that form the city. And the physical and behavioral factors that respond to the disparate spatial images are derived through legibility measurement. As a result, the urban space in Busan has disparate images such as closure, openness, dynamic + closure, dynamic + openness, quiet space. The following are the legibility factors that make each image stronger. The elements of closure are high-density and high-rise buildings, residence, work, openness appeared as a factor of water space, walking and viewing. Dynamic & Closure is the element of industrial activity, dynamic & openness is open space, water space, swimming element, quiet space image is green space, walking, stay factor.

• Management & Information Systems Review
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• v.38 no.3
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• pp.1-19
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• 2019

This paper investigates the asymmetric effects of crude oil price uncertainty on industrial stock returns under different market conditions (bearish and bullish stock markets). We consider a quantile regression method using monthly oil volatility index, KOSPI and 22 industrial stock indices from May 2007 to February 2019. Especially, we take care of the positive and negative changes of the oil volatility index to analyze asymmetric effects of the oil price uncertainty for the bearish and bullish stock market conditions. During the bearish markets, the oil volatility index has relatively strong statistically significant negative effects on the industrial stock returns. These effects gradually decrease when the market conditions became more bullish markets. In particular, positive changes in the oil volatility index yields a further significant decrease in 12 industrial stock returns during the extreme bearish markets. Moreover, during the bullish markets, negative changes in the oil volatility index have statistically significant negative effects on the 12 industrial stock returns. From the empirical results, we see that participants of the Korean stock market are sensitive to bad news in a recession.

• Korean Journal of Biological Psychiatry
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• v.3 no.2
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• pp.295-301
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• 1996

We investigated the characteristics of cognitive-behavioral response to auditory hallucinations in 27 schizophrenic patients. The results were as follows : 1) The most frequent cognitive and behavioral response was healthy cognitive one such as suppression or ignoring and increasing physiological arousal, respectively. 2) The characteristics of auditory hallucinations in good/fair copers was that if was more likely to be mild in severity and insight-oriented And increasing physiological arousal was used more frequently in good/fair copers and unhealthy cognitive-behavioral response was used more frequently in poor copers. 3) Out of 3 variables(duration, insight and severity of auditory hallucinations), the insight of auditory hallucinations was the only factor which made difference in unhealthy cognitive response. In conclusion, there were quite a diverse and unique cognitive-behavioral response to auditory hallucinations in schizophrenia.

• Journal of Korean Society of Transportation
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• v.23 no.7 s.85
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• pp.165-179
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• 2005

The object of this study is a development of a stochastic user equilibrium transit assignment algorithm for multiple user classes considering stochastic characteristics and heterogeneous attributes of passengers. The existing transit assignment algorithms have limits to attain realistic results because they assume a characteristic of passengers to be equal. Although one group with transit information and the other group without it have different trip patterns, the past studies could not explain the differences. For overcoming the problems, we use following methods. First, we apply a stochastic transit assignment model to obtain the difference of the perceived travel cost between passengers and apply a multiple user class assignment model to obtain the heterogeneous qualify of groups to get realistic results. Second, we assume that person trips have influence on the travel cost function in the development of model. Third, we use a C-logit model for solving IIA(independence of irrelevant alternatives) problems. According to repetition assigned trips and equivalent path cost have difference by each group and each path. The result comes close to stochastic user equilibrium and converging speed is very fast. The algorithm of this study is expected to make good use of evaluation tools in the transit policies by applying heterogeneous attributes and OD data.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.1097-1099
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• 2017

본 논문은 대뇌 활성화 상태 변화와 혈액형간의 상관성 분석을 목적으로 한다. 혈액은 인체의 혈관을 통하여 몸 전체로 순환하는 액체 성 물질이다. 이 혈액을 구성하는 물질의 이질적 차이를 나타내는 차별적 유형을 혈액형이라 하며, 혈액형은 멘델의 법칙에 따라 부모에서 자식으로 유전된다. [1] 최근 들어 혈액형이 가지는 유전적 특징을 통한 질병 진단 및 치료, 예방을 위한 연구가 진행되고 있으나, 대부분의 연구는 육체적인 질병과 관련되어 있는 실정이다. 그러나, 혈액형의 경우 유전적 특성을 가지고 있으며, 신경 전달 망에 영향을 끼칠 것으로 추정 되는바 육체적 질병뿐만 아닌 정신적인 질환에도 혈액형에 따른 치료 및 예방방법을 차별화 하여, 보다 효율적인 치료 및 예방을 수행 할 수 있을 것으로 판단된다. 본 논문에서는 이를 위하여, 외부자극에 따른 대뇌 활성화 상태 변화를 분석하며, 특히 혈액형에 따른 상태변화의 상관성을 분석하고자 한다. 본 논문에서 활용하는 외부 자극은 청각 자극을 활용하며, 먼저 혈액형에 따른 피험자 군의 분류를 수행하여 동일 군 내 공통반응 및 상이한 군 간의 특이반응을 분석하여, 혈액형이 대뇌 활성화 상태 변화 및 정신질환에 따른 증상발현 등과 유관함을 검증하고자 한다.

• The Journal of the Korea Contents Association
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• v.13 no.1
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• pp.127-136
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• 2013

This report is aimed to be used as the basic research resource about the various form expression about the picture books, based upon the analysis whether male and female children are different from their preferences to illustrations and whether the expression form between male and female children are different from the other. The objects of study are one hundred and sixteen's of 6 to 7 years old children (male 58 vs. female 58) who are able to understand the illustration. The two times of response surveys were done with one hand is to interview an individual child and the other hand is to fill out by children. The methods used in this study are composed of the representable, simple, exaggerated, and distorted form of expression in order to draw the detail and precise reactions of male and female children In the case of preference analysis of male and female about the illustration, both male and female prefer the distorted form which express contradictively rather than the real, representable, simple, and exaggerate form of expression or which expresses the distorted and the changed by the binding of different things. In the respect of the responses, the various responses were seen to the simple and the exaggerated form in comparative with the representable form. In the respect of the analysis of language response, the individual response was highly marked to the representable form, and the informational response, the heuristic response, and the imaginative response.

• Journal of The Korean Association For Science Education
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• v.24 no.6
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• pp.1063-1069
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• 2004

This study investigated the effects of grouping method in solving chemistry problems using Think-Aloud Paired Problem Solving (TAPPS). Three classes (125 students) of a co-ed high school in Seoul were randomly assigned to the control, the homogeneous TAPPS, and the heterogeneous TAPPS groups. Prior to the instructions, a test of awareness of metacognition was administered. In the treatment groups, students were grouped into either homogeneous or heterogeneous group on the basis of their pre-achievement levels, and worked in pairs on chemistry problems about chemical equation and stoichiometry. Students' analytical skill, problem solving ability, and awareness of metacognition were examined after the instructions. One-way ANCOVA results indicated that the scores of the homogeneous TAPPS group in the analytical skill test were significantly higher than those of the heterogeneous TAPPS group. However, there were no significant differences among the three groups in the problem solving ability and the awareness of metacognition.

• Korean Journal of Cognitive Science
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• v.25 no.3
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• pp.211-232
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• 2014

People search a certain object or a person so many time in a day. Besides the information about what the target is, perceptual information of the target can influence on the search process. In the current study, using an eye-tracker we aimed to examine whether the perceptual information of previewing target stimuli on the visual search process of the target and the task performance. Participants had to identify the previewing target stimulus presented in the middle of the screen, and then had to search the target among 8 items presented in a circle array, and had to decide whether the size of the target in the search display was same as that of the previewing stimulus. The experimental conditions were divided into 8 within-subject conditions by whether the search display was consisted of all the same size items or different size items (homogeneous search display vs. inhomogeneous search display), by the size of the preview target stimulus, and by the size of the target stimulus in the search display. Research hypothesis is that the size information of the previewing influence on the visual search process of the target and task performance when the items in the search display are in different sizes. In the results of behavioral data analysis, the reaction time showed the main effect of the search display, and the size of the target stimulus in the search display. and the interaction between the size consistency effect of target stimulus and the search display condition. In the results of analysis of eye-movement information, the Initial Saccade to Target Ratio measurement showed the interaction between the size consistency effect of target stimulus and the search display condition as the reaction time measurement did. That is, the size consistency effect of target stimulus only in the inhomogeneous search display condition indicated that participants searched the items in the same size as that of preview target stimulus. Post-hoc analyses revealed that the search and task performance in the inhomogeneous display condition were faster when the target size was consistent, but rather slower when the target size was inconsistent.

• Journal of the Korean Chemical Society
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• v.47 no.5
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• pp.519-529
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• 2003

This study investigated the characteristics of verbal interactions of various small groups based on previous achievement in paired think-aloud problem solving. Two classes of a high school were assigned to the homogeneous and heterogeneous groups, and taught on chemistry. Students from homogeneous groups (high${\cdot}$high, mid？id) and heterogeneous groups (high${\cdot}$mid, high${\cdot}$low) were selected, and their algorithmic problem solving on chemical equation and stoichiometry were audio/video taped. In high${\cdot}$high group, solver's 'require agreement' and listener 'agree' were frequently exhibited. On the other hands, listener's 'point out' and solver's 'modify' were frequently exhibited in mid${\cdot}$mid group, which was also observed in the heterogeneous groups (high${\cdot}$mid, high${\cdot}$low). Many verbal interactions were analyzed to be in symmetrical type. In this type, 'require agreement-agree' of high${\cdot}$high group was the most frequent. 'problem solving-agree' of high${\cdot}$high group was the most frequent in the solver-dominant type, while 'point out-modify' of high${\cdot}$low group in the listener-dominant type. The verbal behaviors related to the solving stage were frequently observed, but there were few related to the reviewing stage.