• Journal of the Korea Society of Computer and Information
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• v.7 no.2
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• pp.196-204
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• 2002

This paper examines the price discovery role of the KOSPI 200 futures index for its cash index. It was used the intrady data for KOSPI 200 and futures index from July 1998 to June 2001. The existing Preceding study for KOSPI 200 futures index was used the data of early market installation, but this study is distinguished to use a recent data accompanied with the great volume of transaction and various investors. We established three hypothesis to examine whether there is the price discovery role in the KOPSI 200 futures index and the characteristics of that. First, to examine whether the lead-lag relation is induced by the infrequent trading of component stocks, observations are sorted by the size of the trading volume of cash index. In a low trading volume, the long lead time is reported and the short lead time in a high volume. It is explained that the infrequent trading effect have an influence on the price discovery role. Second, to examine whether the lead-lag relation is different under bad news and good news, observations are sorted by the sign and size of cash index returns. In a bad news the long lead time is reported and the short lead time in a good news. This is explained by the restriction of"short selling" of the cash index Third, we compared estimates of the lead and lag relationships on the expiration day with those on days prior to expiration using a minute-to-minute data. The futures-to-spot lead time on the expiration day was at least as long as other days Prior to expiration, suggesting that "expiration day effects" did not demonstrate a temporal character substantially different form earlier days. Thus, while arbitrage activity may be presumed to be the greatest at expiration, such arbitrage transactions were not sufficiently strong or Pervasive to alter the empirical price relationship for the entire day. for the entire day.

• The Korean Journal of Financial Management
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• v.11 no.2
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• pp.1-39
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• 1994

본 논문은 chaos이론을 우리나라의 증권시장에 적용하여 실증적으로 자기닮음, 장기기억, 반복형태와 기간주기를 파악하는데 그 목적 이 있다. chaos를 재무관리 분야나 경제학분야에 적용한 경우가 희소하여 이에 대한 천착은 어려운 실정이다. 그러나 chaos의 방법론을 재무관리 분야에 직접적으로 채택 적용하지는 않았으나, 그 대신 전통적인 시계열 분석을 비롯한 전통적인 실증분석을 사용한 많은 연구에서 chaos적 요소가 발견된 경우가 많다. 다만 이 연구들에서 발견된 것들을 chaos적 관점에서 이해하거나 파악하지 않고 전통적인 틀 속에서 해석하고 설명하려고 시도하고, 나아가 그와 같은 현상이 발견되었으므로 전통적인 틀속에서 새로운 방법을 개발하여 이 현상을 설명하거나 해소하려는 노력이 경주되어 왔으며 또한 계속되고 있다. 이 논문에서는 이러한 발견들을 chaos적 관점에서 해석해 보고자 한다.

• The Zoological Society Korea : Newsletter
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• v.18 no.1
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• pp.34-40
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• 2001

Perkinsus 속은 원생동물문에 속하며 현재 세계적으로 5종이 보고되고 있다. 이들은 모두 기생생물로 수산업적으로 매우 중요한 해산 패류에 막대한 피해를 입히고 있다. Perkinsus는 국내의 경우 1995년에 바지락에서 발견되었으며 일부 바지락 양식장에 있어 바지락 대량 폐사에 직, 간접적으로 영향을 미치고 있는 것으로 보고되고 있다. 국내에서 발견된 Perkinsus는 아직 정확한 분류학적 위치가 밝혀지지 않고 있으나 일본에서 발견된 종 및 유럽에서 발견된 Perkinsus atlanticus와 매우 유사한 종으로 간주된다 이 논단에서는 해산 연체동물에 기생하는 Perkinsus의 생활사, 조직병리학적 관찰, 생태적 특성 및 최근의 연구 동향 등을 보고하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10a
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• pp.139-141
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• 2003

독해 과정에서 문장 의미간 개연성 파악은 저자의 저술의도 파악에 중요한 요소로 작용한다. 개연성 파악을 위해서는 우선 어휘들과 그들의 연관관계로 구성된 개연사슬을 발견할 필요가 있다. 본 논문에서는 Factotum SemNet을 활용하여 개연사슬의 발견을 자동화하였고 이에 대한 도구를 개발하였다. 그 후, 이 도구를 이용한 실험을 통해서 개연사슬 발견의 자동화가 가능함을 알 수 있었다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2018.11a
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• pp.197-200
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• 2018

본 논문에서는 미디어사물인터넷의 기본적인 기능인 미디어사물을 발견하고 연결하는 과정에 필요한 API 및 프로세스에 대해 설명한다. 또한 미디어사물의 기능, 자원, 데이터를 사용하기 위해 필요한 미디어사물거래 API 와 이의 프로세스를 설명한다. 기본적인 순서로 가장 먼저 미디어사물을 발견할 때, 기능을 기반으로 발견하고 연결하여 해당 기능에 대한 사용권을 선점한다. 미디어사물이 연결된 후에 해당 기능을 사용하는데 필요한 비용에 따라 해당 미디어 토큰을 지불하고, 지불한 만큼의 시간 동안 기능을 사용하는 과정을 시퀀스 다이어그램을 통해 설명하고 각각 필요한 API 를 설명한다.

• Information Systems Review
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• v.17 no.2
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• pp.133-156
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• 2015

A recent interesting user experience in social curation websites is that they often encounter unanticipated, valuable information through accidental, incidental, or serendipitous discoveries. Prior research suggests that serendipity can help solve a problem, generate a creative idea, and invent a new product because it allows for an intellectual leap to arrive at a novel insight that is suddenly instrumental to a task. Despite the significant roles, the notion of serendipity is relatively unexplored especially in the context where people actually experience it, such as social curation websites. In this study, we theoretically identified the key technological features of social curation websites, which support three major curation activities respectively: browsing, collection, and interaction. We then examined their impacts on the occurrence of serendipitous discoveries in the process of information seeking. Our results using data collected from real users reveal that the technological features all affected user experience of serendipity and the interaction feature has stronger impacts than the other two. Moreover, it was also found that user experience of serendipity significantly affected website usage behavior such as intention to return and intention to contribute to the website.

• Journal of The Korean Association For Science Education
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• v.35 no.1
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• pp.109-119
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• 2015

In this study, we investigated how the scientific problem-finding ability of pre-service teachers is improved through open-situation scientific problem-making activity. We organized two experimental groups and a control group by degree of participation. The 1st experimental group is an actively participating class, while the 2nd experimental group is a passively participating class. We developed and applied a worksheet for training in problem-making. The pre-service teachers filled in the worksheet for problem-making once a week for seven weeks, then the lecturer gave feedback for every worksheet. We developed and applied a problem finding test in an open-situation to measure their problem finding ability at pre- and post-training. As a result of the training, problem level and diversity improved for pre-service teachers through continuous problem-making activities and feedback. The 1st experiment group significantly improved on the quality and quantity of problems. Especially in the originality, elaboration, verifiability, and variables' category, the 1st experimental group significantly improved compared to the control group and the 2nd experimental group. On the other hand, the quality and quantity of problems of the 2nd experimental group decreased. These results provide a basis for correlation between training attitude and improvement of problem-finding ability. Based on the result of this study, continuous problem-making training and feedbacks are helpful in improving the problem-finding ability of pre-service teachers.

• Management & Information Systems Review
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• v.35 no.2
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• pp.1-12
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• 2016

In this study, price discovery between the KOSPI200 spot, and leveraged ETFs(Leveraged KODEX, Leveraged TIGER, Leveraged KStar) is investigated using the vector error correction model(VECM). The main findings are as follows. Leveraged KODEX(Leveraged TIGER, Leveraged KStar) and KOSPI200 spot are cointegrated in most cases. There is no interrelations between the movement of Leveraged KODEX(Leveraged TIGER, Leveraged KStar) and KOSPI200 spot markets in case of daily data. Namely, in daily data, Leveraged KODEX(Leveraged TIGER, Leveraged KStar) doesn't plays more dominant role in price discovery than the KOSPI200 spot.

• Journal of Korean Philosophical Society
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• v.148
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• pp.157-181
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• 2018

The aim of this essay is to identify elements of methodologies to investigate the development of Newtonian dynamics. This methodology involves the transformation and synthesis of preceding theories. My essay attempts to confirm my assertion by analyzing historical case of Newton's discovery of his dynamics. While discovering his mechanistic theory, Newton reconstructed theoretical concepts and structures of intellectual predecessors, such as Aristotle, Descartes, Galileo, and Kepler. Newton's synthesis was possible only after carefully reconstructing the appropriate and useful ideas of previous natural philosophers' ideas. As a result, Newtonian dynamics are completed with these modified and integrated concepts incorporated into Newton's law of motion and space-time concepts. This study consists of two parts. First, Lakatos' research program has been applied in order to analyze the structure of Newtonian dynamics. Second, the aforementioned methodologies of discovery are distilled from the case study.

• 건강소식
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• v.34 no.12
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• pp.38-39
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• 2010

20세기 초만 해도 당뇨병은 걸리면 얼마 못가 비참한 죽음을 맞이하는 병이었다. 죽음을 늦추는 방법이라고는 굶는 것, 단 한가지 뿐이었다. 당뇨병은 일찍이 2세기 무렵부터 알려져 있었지만 1922년에 들어서야 비로소 치료의 실마리가 풀린 질병이다. 바로 프레데릭밴팅과 찰스 베스트에 의해서 인슐린이 발견되었기 때문이다. 밴팅과 베스트의 위대한 업적, 인슐린 발견 과정을 살펴본다.