• Proceedings of the Korean Information Science Society Conference
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• 2000.10b
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• pp.266-268
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• 2000

본 논문에서는 가상세계를 구축하는데 기반이 되는 가상환경을 설계하고 구현한다. 가상환경의 설계는 지금까지는 체계화된 구조화 방법이 없이 이루어져 왔다. 하지만 본 논문에서는 실세계를 구성하는 환경변수의 분류를 바탕으로, 가상환경을 기능과 범위에 따라 6개의 계층으로 구조화한다. 이 구분된 각 계층들은 각기 독립적으로 동작하며, 주기적으로 정보를 교환하여 전체환경을 구성하게 된다. 설계된 가상환경은 실세계 환경과 같이 다양한 상황을 보여주며 확장에 있어서도 유연함을 보여 준다. 마지막으로 제안된 가상환경의 구조화 방안을 바탕으로 가상세계를 구현하여 시험함으로써 그 가능성을 보였다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2018.06a
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• pp.248-249
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• 2018

본 논문에서는 고해상도 자궁 내막 세포들을 대상으로 정상세포와 이상세포들을 구별하기 위한 알고리즘을 제안한다. 구체적으로 계층적 구조를 갖는 Convolutional Neural Network (CNN) 모델을 기반으로 네 가지 세포들을 구분하는 알고리즘을 제안한다. 이 연구에서 고해상도 영상을 분류하면서도 복잡도 증가를 막기 위해 효율적인 전처리 과정을 사용하였다. 다양한 컴퓨터 실험을 통하여 제안하는 기술을 사용할 때, 인식률이 향상되는 것을 확인할 수 있었다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.185-186
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• 2021

해양사고 분석을 위한 해양사고 재결서는 중요한 정보제공의 원천이며 재발방지를 위한 개선사항을 제시한 자료이다. 하지만 이는 보고서 형태로 구성되어 수량화 하여 데이터로 활용하기에는 한계가 있다. 본 연구에서는 이러한 해양사고 재결서를 원인요소와 결과요소로 구분하여 계층화작업을 시행하였다. 이를 통해 충돌사고에서 선박조우상황과 충돌부위와의 상관관꼐를 증명하기 위한 기초자료로 사용하고자 한다. .

• Journal of Labour Economics
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• v.40 no.3
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• pp.1-28
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• 2017

Using Korea Labor and Income Panel Surveys data, this paper estimates the effect of schooling level on income over time and the effect of children's education level on intergenerational income persistence. The results show that the impact of education level on income decreased over time. Also, intergenerational income persistence, measured as a dummy variable that has value one if children's income percentile group is same as the father's, increased with children's educational attainment only when the father is in upper income percentile groups. These findings indicate that education fails to play a significant role of the economic ladder and does not much help in raising intergenerational income mobility. Rather, education may possibly function as a means of intergenerational transmission of wealth through parental investment in their children's private education.

• Korean Journal of Remote Sensing
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• v.32 no.3
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• pp.235-244
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• 2016

In large-area crop classification with MODIS data, a mixed pixel problem caused by the low resolution of MODIS data has been one of main issues. To mitigate this problem, this paper proposes a hierarchical classification algorithm that selectively classifies the specific crop class of interest by using their spectral characteristics. This selective classification algorithm can reduce mixed pixel effects between crops and improve classification performance. The methodological developments are illustrated via a case study in Jilin city, China with MODIS Normalized Difference Vegetation Index (NDVI) and Near InfRared (NIR) reflectance datasets. First, paddy fields were extracted from unsupervised classification of NIR reflectance. Non-paddy areas were then classified into corn and bean using time-series NDVI datasets. In the case study result, the proposed classification algorithm showed the best classification performance by selectively classifying crops having similar spectral characteristics, compared with traditional direct supervised classification of time-series NDVI and NIR datasets. Thus, it is expected that the proposed selective hierarchical classification algorithm would be effectively used for producing reliable crop maps.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.2
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• pp.595-601
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• 2018

The era of autonomous vehicles, which drive themselves and in whose operation the driver does not intervene, is fast approaching. The safety of autonomous vehicles can be guaranteed only if they recognize the road infrastructure. However, the road infrastructure consists of road safety facilities, traffic operation systems, and cross-sectional concerns, which include a variety of components, such as types, shapes, and sizes. Therefore, it is necessary to prioritize the road information. This study was conducted to select the priority with which the road infrastructure attributes should be acquired using the AHP (Analytical Hierarchy Process) method. The road infrastructure attributes were categorized into 2 levels, levels 1 and 2, which consisted of 3 and 26 types of attributes, respectively. As a result of the AHP analysis, it was found that the highest priorities of the road infrastructure are the road safety facilities, traffic operation systems and cross sectional concerns. Also, in level-2, the priorities of the safety barriers (road safety facilities), traffic signals (traffic operation systems), and the median (cross sectional) are the highest. Also, this study provides application examples of road infrastructure extraction with the Point Cloud. The results are expected to support the recognition of technology for autonomous vehicles.

• Review of KIISC
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• v.4 no.2
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• pp.47-57
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• 1994

본 논문에서는 컴퓨터 통신망에 관련된 범죄를 유형별로 구분하고 이에 대한 기술적 방지대책을 구체적으로 제시한다. 본 논문은 컴퓨터 범죄를 경험적 기준에 의하여 구분하며 방지대책과의 관계도 분석한다. 기술적 방지대책으로 전형적인 OSI 참조모델에 기초한 보호모델 구조와 컴퓨터 범죄의 각 유형에 대해서 대처할 수 있는 보호 서비스 및 메카니즘 그리고 적용 가능한 계층을 종합적으로 분석 제시한다. 또한 보호메카니즘을 구현하는데 사용되는 대표적 보호알고리듬의 수행시간에 관해서도 기술한다.

• Journal of Korean Philosophical Society
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• v.148
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• pp.213-238
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• 2018

The purpose of this paper is to study logical status and meaning of '$l{\grave{e}}i$[類]' in integrated concept system of 'míng[名]'. The subordinate relationships and integrated systems between genus and species are made up 'míng[名]' in pre-Chin's logical arguments. And '$l{\grave{e}}i$[類]' is a concept that designate what kind of category in all names of sorts and kinds in early China. The logical argumentations of early Chinese philosophers reflect subordinate relationship and integrated system of 'míng[名]'. And then early Chinese philosophers use the 'míng[名]' in other to denote a general concept that totally indicate meanings of genus and species like as Confucius' '$zh{\grave{e}}ng$ míng[正名]'. However early Chinese philosophers make philosophical issues of correspondence between míng[名] and shí[實], not subordinate relationships between genus and species. And then they use the 'míng[名]' in other to denotes not a general concept but a kind of category. Therefore the concept of 'míng[名]' used as a meaning of general concept and sorted out integrated concept system of 'míng[名]' as two categories of míng[名] and shí[實] at the same time in logical argumentations of early Chinese philosophers. The '$l{\grave{e}}i$[類]' of pre-Chin difference from genus of Aristotle spontaneously and conceptually. It is not a concept that in other to compose subordinate relationships and integrated systems. It is not a kind of genus. It divide a kind of denotation that means some kind of aggregations into existence and nonexistence. And it divide a kind of connotation that means some kind of attributes into same and difference. When early Chinese philosophers make distinction and demonstration the correspondence between míng[名] and shí[實], so to speak distinction mean to divide and classify into correspondence or non-correspondence, and demonstration mean to argue about the division and classification. Therefore the concept of '$l{\grave{e}}i$[類]' is a criteria that is to divide and classify the correspondence between míng[名] and shí[實] in integrated concept system of 'míng[名]'.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.3 no.4
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• pp.319-324
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• 2002

The Integration of agent technology and security technology is needed to many application areas like electronic commerce. This paper suggests a model of extended multi-agent engine which supports privacy, integrity, authentication and non-repudiation on agent communication. Each agent which is developed with the agent engine is composed of agent engine layer and agent application layer. We describe and use the concepts self-to-self messages, secure communication channel, and distinction of KQML messages in agent application layer and messages in agent engine layer. The suggested agent engine provides an agent communication language which is extended to enable secure communication between agents without any modifications or restrictions to content layer and message layer of KQML. Also, in the model of our multi-agent engine, secure communication is expressed and processed transparently on the agent communication language.

• The Transactions of the Korea Information Processing Society
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• v.5 no.5
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• pp.1185-1203
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• 1998

When the class is added of deleted in object-oriented system, restructuring of class hierarchy is needed which enables new relationship with classes. But existing system requires much additional analysis costs because it is difficult to know the meaning between parent class and child class. This paper presents the updates method based on semantic modification through new relationship classification method. This method measures the similarity of classes and based on it's relationship, this method restructures class hierarchy by classifying not-equality, part-of, equality, inclusion, subset relation. This method can minimize the probability of meaning error for classes when the class hierarchy is changed. Also this enhances the reusability and understandability through various graphic and text processing.