• Journal of Global Scholars of Marketing Science
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• v.4
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• pp.241-260
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• 1999

국제적 미술 양식이면서 동양적 요소를 갖추고 있는 서체 문자마술을 통하여 우리 미술문화의 현재와 새로운 가능성을 찾아보았다. 서체 문자미술을 이루고 있는 기호인 한자와 한글을 우리 조상들이 생활 속에서 계속 사용하여 왔으며 나아가 조선에 이르러서는 민화에서 문자그림을 나타내고 있다. 현대에 들어서면서 우리의 이름 있는 작가들과 후학들이 서체에서 나타나는 문자를 이용하여 작품세계를 빛내고 있다. 현대미술의 서체적인 문자그림들의 평가와 그 가능성을 밝히고 디자인마케팅에 있어서 시각적인 학습과 기억에의 서체문자 미술의 활용에 대해 고찰하며, 특히 한국미술에 있어 서체적인 문자그림의 전통성과 현대미술에서의 표현을 통하여 서체 문자그림이 동시대 한국 미술문화를 이루는데 한 축을 이루고 있음을 밝히면서, 한국 서체 문자미술이 디자인마케팅에의 시각적 표현활용에 대해 언급하고 있다.

• 전기의세계
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• v.46 no.2
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• pp.5-12
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• 1997

전기학회지의 전력전자 특집호에 게재할 원고로 우리나라를 중심으로 하는 "전력전자분야의 발전사"라는 제목이 집필을 부탁받았다. 참으로 힘든 과제이다. 한 나라의 문학이니 음악의 발전사는 그나마 그 나라의 고유전통이 있어 어지간히 줄거리를 잡을 수 있다고 본다. 그러나 개발도상국가에서의 과학기술 발전은 선진국의 후진에 머물러 있기 마련이고 결국 선진국의 발전사에 시간의 지연을 추가하면 비슷한 패턴이 될 것이라고 생각된다. 필자는 미비한 자료를 갖추고 교수생활과 학회 회원을 지내는 동안의 기억을 더듬어서 다음과 같은 내용으로 엮어 보았다. 처음에 방전관시대에서부터 Thyristor 발명까지의 Power Electronics 탄생을 위시하여 전력전자의 공학과 산업이 어떻게 한국에 정착했는가를 기술하였다. 이어서 전기학회에서의 전력전자의 역할과 국제교류의 단서가 되는 학술회의의 개최가 전력전자분야의 발전에 얼마나 기여했는가를 기술하면서 나름대로 우리나라 전력전자의 발전사로 하였다. 발전사로 하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.11a
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• pp.251-254
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• 2002

정신지체학생은 주의 집중의 문제, 느린 학습속도, 기억력, 저조한 흥미와 관심 등으로 인하여 전통적 수업방식으로는 높은 학습효과를 기대하기 어렵다. 멀티미디어와 컴퓨터를 활용한 수업은 학생들의 흥미를 유발시켜 집중력이 향상될 뿐만 아니라 개인차가 심한 정신지체학생들에게 개별학습을 함으로써 높은 학습효과를 기대한 수 있다. 다양한 경험과 생환중심의 교육이 필요한 정신지체아동들이 실생활에서 접하기 힘든 내용을 가상적으로 경험할 수 있는 코스웨어나 학습한 후에 생활에 바로 적용할 수 있는 생활중심 코스웨어, 인터넷 환경의 웹 기반 코스웨어 등 정신지체 아동을 위한 소프트웨어는 거의 전무한 실정이다. 본 논문에서는 인터넷 환경에서 멀티미디어와 컴퓨터를 통하여 다양한 경험뿐만 아니라 실생활에 필요한 내용을 학습하여 사회성을 기를 수 있는 웹 기반 코스웨어 개발 방법을 제안한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.04a
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• pp.401-403
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• 2014

초고속 인터넷 망이 발달함에 따라 다양한 서비스들에 대한 사용자의 요구가 증가되었다. 보통 사용자들은 여러 서비스 사이트를 이용함에 있어 여러 개의 아이디와 패스워드를 기억하여 사용한다. 이러한 불편함을 해결하고 관리측면에서 효과적인 방법으로 제안된 인증 시스템이 SSO(Single Sign-On)이다. SSO 인증 모델 중 브로커 기반의 경우 중앙집중식 시스템 관리를 사용하여 인증 연산처리의 효율성을 증가시키는 장점을 가지고 있으며, 대표적으로 Kerberos 인증이 있다. 하지만 전통적인 Kerberos 인증은 패스워드 공격 및 재전송 공격에 비교적 심각한 위험성을 가지고 있어 그에 대한 연구가 활발히 진행되었다. 이에 본 논문에서는 기존방식의 문제점을 해결하여 보다 개선된 브로커 기반 SSO 인증 모델을 제안하였다.

• Journal of Korean Society of Archives and Records Management
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• v.17 no.2
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• pp.27-56
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• 2017

The need for and importance of preserving various information resources on the web is constantly increasing. In addition to traditional types of records, the web contains communication records displaying various people's diverse viewpoints and connecting an event to its context. In particular, information resources produced during a disaster must be collected for long-term preservation. The "OASIS Disaster Archive" is a service provided through OASIS, which was developed and is managed by the National Library of Korea, to collect and preserve online information resources related to the recent disaster events in Korea. This study examines the characteristics and current status of the contents of the Disaster Archive to make suggestions for its improvements.

• Journal of KIISE:Computer Systems and Theory
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• v.32 no.4
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• pp.177-185
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• 2005

NAND-type flash memory is becoming increasingly popular as a large data storage for mobile computing devices. Since flash memory is an order of magnitude more expensive than magnetic disks, data compression can be effectively used in managing flash memory based storage systems. However, compressed data management in NAND-type flash memory is challenging because it supports only page-based I/Os. For example, when the size of compressed data is smaller than the page size. internal fragmentation occurs and this degrades the effectiveness of compression seriously. In this paper, we present an efficient flash compression layer (FCL) for NAND-type flash memory which stores several small compressed pages into one physical page by using a write buffer Based on prototype implementation and simulation studies, we show that the proposed scheme offers the storage of flash memory more than $140\%$ of its original size and expands the write bandwidth significantly.

• International Area Studies Review
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• v.21 no.2
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• pp.3-20
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• 2017

Traditional co-integration analysis method is known to be difficult to clearly determine the relationship between the cointegrated variables. This study utilizes a fractional cointegation method and a causal analysis of time and frequency domain among the exchange rates of Korea, China and Japan. The results show that even though traditional cointegration methods did not clarify the existence of cointegration, exchange rates were fractionally cointegrated. Causal analysis of time domain and frequency domain provided somewhat different results, but the yen/dollar was useful for forecasting won/dollar and yuan/dollar. Proper use of causal analysis of frequency domain and fractional cointegration emthods may provide useful information that can not be explained from the traditional method.

• Issues in Feminism
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• v.9 no.1
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• pp.79-111
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• 2009

This paper analyses the stories of 38 women of the in-depth survey, enforced by the Institute for Gender Research, Seoul National University. This survey focused on motherhood, but many memories were told by most of women. That shows strong existence of fatherhood in the process of personality formation in Korean society. The stories of 38 women could be divided into 5 types: (1) 5 cases where there is no mention about father; (2) 5 cases where simple and negative mentions are made about fathers; (3) 6 cases where no instrumental fatherhood but expressive fatherhood is found; (4) 11 cases of women who experienced both instrumental and expressive fatherhood, and (5) 12 cases (1 case is overlapped with one of the 3rd type) where the relationship between daughter and father is very close. The analyses denies the dichotomy of instrumental and expressive fatherhood, and the theories of "New Men" with expressive fatherhood who appeared as a result of social change and feminist movement. It also shows the various aspects of expressive fatherhood, and that close relationship between father and daughter plays an important role for the empowerment of daughter.

• The Korean Journal of Financial Management
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• v.25 no.3
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• pp.111-130
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• 2008

This paper compares long term equilibrium relation of KOSPI 200 which is underling stock and its futures by using general method fractional cointegration instead of existing integer cointegration. Existence of integer cointegration between two price time series gives much wider information about long term equilibrium relation. These details grasp long term equilibrium relation of two price time series as well as reverting velocity to equilibrium by observing difference coefficient of error term when it renounces from equilibrium relation. The result of this study reveals existence of long term equilibrium relation between KOSPI200 and futures which follow fractional cointegration. Difference coefficient, d, of 'two price time series error term' satisfies 0 < d < 1/2 beside bandwidth parameter, m(173). It means two price time series follow stationary long memory process. This also means impulse effects to balance price of two price time series decrease gently within hyperbolic rate decay. It indicates reverting speed of error term is very low when it bolts from equilibrium. It implies to market maker, who is willing to make excess return with arbitrage trading and hedging risk using underling stock, how invest strategy should be changed. It also insinuates that information transition between KOSPI 200 Index market and futures market does not working efficiently.

• Journal of the Korean Society of Marine Environment & Safety
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• v.28 no.5
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• pp.780-790
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• 2022

Quantitative risk levels must be presented by analyzing the causes and consequences of accidents and predicting the occurrence patterns of the accidents. For the analysis of marine accidents related to vessel traffic, research on the traffic such as collision risk analysis and navigational path finding has been mainly conducted. The analysis of the occurrence pattern of marine accidents has been presented according to the traditional statistical analysis. This study intends to present a marine accident prediction model using the statistics on marine accidents related to vessel traffic. Statistical data from 1998 to 2021, which can be accumulated by month and hourly data among the Korean domestic marine accidents, were converted into structured time series data. The predictive model was built using a long short-term memory network, which is a representative artificial intelligence model. As a result of verifying the performance of the proposed model through the validation data, the RMSEs were noted to be 52.5471 and 126.5893 in the initial neural network model, and as a result of the updated model with observed datasets, the RMSEs were improved to 31.3680 and 36.3967, respectively. Based on the proposed model, the occurrence pattern of marine accidents could be predicted by learning the features of various marine accidents. In further research, a quantitative presentation of the risk of marine accidents and the development of region-based hazard maps are required.