• Journal of the Economic Geographical Society of Korea
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• v.22 no.1
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• pp.52-69
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• 2019

The aim of this study is to examine the development of social economy and institutional isomorphism in Chungnam Province. Although 'social economy enterprises' in Chungnam Province achieved rapid quantitative growth, public-led policy and institutional framework has intensified institutional isomorphism. Institutional isomorphism is a phenomenon in which all type of organization and activities become similar in an institutional environment. This isomorphism hinders the social value orientation and innovation of social economic enterprises. As a result of the case analysis, institutional isomorphization was intensified if regional ecosystem(that can maintain and strengthen social value orientation) was not established. The creation of social value is at a level that satisfies the institution and the social value orientation is also weakened.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.33 no.4
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• pp.601-608
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• 2023

Homomorphic encryption is a promising technology that has been extensively researched in recent years. It allows computations to be performed on encrypted data, without the need to decrypt it. In this paper, we perform bibliometric analysis to objectively and quantitatively analyze the research trends of homomorphic encryption technology using 6,047 homomorphic encryption papers from the Scopus database. Specifically, we analyze the number of papers by year, keyword co-occurrence, topic clustering, changes in related keywords over time, and country of homomorphic encryption research institutions. Our analysis results provide strategic directions for research and application of homomorphic encryption and can be a great help for subsequent research and industrial applications.

• Journal of the Korea Society of Computer and Information
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• v.14 no.10
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• pp.251-258
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• 2009

Data mining is a method that extract useful knowledges from huge size of data. Recently, a focussing research part of data mining is to find interesting patterns in graph databases. More efficient methods have been proposed in graph mining. However, graph analysis methods are in NP-hard problem. Graph pattern mining based on pattern growth method is to find complete set of patterns satisfying certain property through extending graph pattern edge by edge with avoiding generation of duplicated patterns. This paper suggests an efficient approach of reducing computing time of pattern growth method through pattern growth's property that similar patterns cause similar tasks. we suggest pruning methods which reduce search space. Based on extensive performance study, we discuss the results and the future works.

• Review of KIISC
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• v.33 no.5
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• pp.47-55
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• 2023

동형암호는 암호화 상태에서도 연산이 가능하다는 특징을 지니고 있어 매우 유망한 프라이버시 보호 기술로 알려져 있다. 하지만 이런 장점에도 불구하고 아직 활발히 활용되지 못하고 있는데, 이는 매우 느린 연산 성능이라는 단점 때문이다. 이런 단점을 극복하기 위해서 동형암호 가속을 목표로 하는 많은 연구들이 수행되었으나, 아직 보편화 수준에 도달하지 못했으며, 특히 각 연구들이 독립적으로 산개되어 시너지효과를 누리지 못하고 있다는 특징을 보여주고 있다. 본 논문은 산업/학계의 다양한 동형암호 가속 연구들을 분류, 소개하며, 이들간의 관계를 분석하여 시너지 효과를 누릴 수 있는 가이드라인을 제시한다.

• Journal of KIISE:Software and Applications
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• v.28 no.9
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• pp.688-698
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• 2001

A homonym could be disambiguated by anther words in the context such as nouns, predicates used with the homonym. This paper proposes a homonym disambiguation system based on statistical semantic information which is extracted from definitions in dictionary. The semantic information consists of nouns and predicates that are used with the homonym in definitions. In order to extract accurate semantic information, definitions are used with the homonym in definitions. In order to extract accurate semantic information, definitions are classified into two types. One has hyponym-hypernym relation between title word and head word (homonym) in definition. The hyponym-hypernym relation is one level semantic hierarchy and can be extended to deeper levels in order to overcome the problem of data sparseness. The other is the case that the homonym is used in the middle of definition. The system considers nouns and predicates simultaneously to disambiguate the homonym. Nine homonyms are examined in order to determine the weight of nouns and predicates which affect accrutacy of homonym disambiguation. From experiments using training corpus(definitions in dictionary), the average accruracy of homonym disamguation is 96.11% when the weight is 0.9 and 0.1 for noun and verb respectively. And another experiment to meaure the generality of the homonym disambiguation system results in the 80.73% average accuracy to 1,796 untraining sentences from Korean Information Base I and ETRI corpus.

• Korean Journal of Ichthyology
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• v.20 no.1
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• pp.1-6
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• 2008

Three types of clonal cell lines were isolated according to their size and phenotype from the adherent cell populations in long-term liquid cultures from the embryonic fibroblast cells of Zebrafish, Danio rerio. All kind of cell lines were well proliferated. The size and number of clonal cell lines derived colonies from stable embryonic cells were significantly increased in the presence of NAC and A2P conditioned medium from the cell lines. The stable cell lines and clonal cell lines were cap-able of well proliferation in vitro. These cell lines have been maintained in continuous culture without change in characteristics. A majority of the clonal cells (80%) was shown a normal chromosomal complement (50 chromosomes, 2N) in according with FACs analysis. Majority of cells were positive to vimentin staining and none of them were positive for nestin and Oct -4 by immunocytochemistry. These results indicate that the clonal cell lines obtained from cultured cells are fibroblasts and may be extremely useful in genetic manipulation for further nuclear transfer and fish cloning.

• KIPS Transactions on Software and Data Engineering
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• v.1 no.1
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• pp.31-42
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• 2012

In order to process the suffix derived nouns of Korean, most of Korean processing systems have been registering the suffix derived nouns in dictionary. However, this approach is limited because the suffix is very high productive. Therefore, it is necessary to analyze semantically the unregistered suffix derived nouns. In this paper, we propose a method to disambiguate homograph suffixes using Korean lexical semantic network(U-WIN) for the purpose of semantic analysis of the suffix derived nouns. 33,104 suffix derived nouns including the homograph suffixes in the morphological and semantic tagged Sejong Corpus were used for experiments. For the experiments first of all we semantically tagged the homograph suffixes and extracted root of the suffix derived nouns and mapped the root to nodes in the U-WIN. And we assigned the distance weight to the nodes in U-WIN that could combine with each homograph suffix and we used the distance weight for disambiguating the homograph suffixes. The experiments for 35 homograph suffixes occurred in the Sejong corpus among 49 homograph suffixes in a Korean dictionary result in 91.01% accuracy.

• Journal of KIISE:Software and Applications
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• v.30 no.11
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• pp.1112-1123
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• 2003

WSD(word sense disambiguation) is one of the most difficult problems in Korean information processing. The Bayesian model that used semantic information, extracted from definition corpus(1 million POS-tagged eojeol, Korean dictionary definitions), resulted in accuracy of 72.08% (nouns 78.12%, verbs 62.45%). This paper proposes the statistical WSD model using NPH(New Prior Probability of Homonym sense) and distance weights. We select 46 homonyms(30 nouns, 16 verbs) occurred high frequency in definition corpus, and then we experiment the model on 47,977 contexts from ‘21C Sejong Corpus’(3.5 million POS-tagged eojeol). The WSD model using NPH improves on accuracy to average 1.70% and the one using NPH and distance weights improves to 2.01%.

• Journal of Korea Ship Safrty Technology Authority
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• s.35
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• pp.41-51
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• 2013

선박 고속화와 해양레저선박에 대한 관심 증대로 쌍동형 선체건조가 증가하고 있으며 일반적으로 쌍동형 선체는 복원성, 내항성능 및 저항추진 등에서 단동형 선체보다 고속선형 및 갑판활용에 적합하다고 알려져 있다. 하지만, 쌍동형 선체는 갑판 상에서 두 개의 선체를 동체로 결합시킨 선체로서 운동 시 부체 간 공진현상이 수반된 자유표면 거동과 유체력이 발생할 수가 있다. 따라서, 이 논문에서는 이런 공진현상을 감쇠시킬 수 있는 방안을 모색하여 합리적인 쌍동형 선체의 운동응답특성과 동유체력을 산출하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.225-228
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• 2021

동형암호를 이용한 통계 분석은 기존의 개인정보보호 문제로 수행할 수 없었던 데이터에 대해서 통계분석이 가능하게 만든다. 본 논문에서는 대용량 데이터에 사용되는 대표적 통계 수치인 평균, 분산, 왜도, 첨도를 병렬처리를 사용하여 구하는 방법을 제안한다. 또한, 연산이 비교적 제한적인 동형암호에서도 통계적 수치를 구하기 위하여 동형암호문끼리의 뺄셈, 나눗셈, 제곱근 연산을 제안한다. 이를 통해, 분산된 대용량 데이터에 대해서도 동형암호를 통해 다양한 통계 연산이 가능할 것으로 기대된다.