• 한국경영과학회지
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• 제31권2호
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• pp.141-155
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• 2006

In this paper, we address an extended hub-and-spoke transportation network design problem (EHSNP). In the existing hub location problems, the location and number of spokes, and shipments on spokes are given as input data. These may, however, be viewed as the variables according to the areas which they cover. Also, the vehicle routing in each spoke needs to be considered to estimate the network cost more correctly. The EHSNP is a problem of finding the location of hubs and spokes, and pickup/delivery routes from each spoke, while minimizing the total related transportation cost in the network. The EHSNP is an integrated problem that consists of several interrelated sub-problems. To solve EHSNP, we present an approach based on a symbiotic evolutionary algorithm (symbiotic EA), which are known as an efficient tool to solve complex integrated optimization problems. First, we propose a framework of symbiotic EA for EHSNP and its genetic elements suitable for each sub-problem. To analyze the proposed algorithm, the extensive experiments are performed with various test-bed problems. The results show that the proposed algorithm is promising in solving the EHSNP.

• International journal of advanced smart convergence
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• 제4권2호
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• pp.61-68
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• 2015

For a recent most companies to make efficient business management, we are using a groupware service of integrated information system of the entire group. Groupware service integrates the cooperation in excellent synergy and duplicates has been business functions of the business, through the improvement of multi-purpose business processing capacity, there is an advantage of reduced operating costs. However, if the parent company and subsidiary, or to handle common tasks such information agency, which may cause differences in the format of the data passed in the case of a need to provide a document. Therefore, in this paper, in order to solve the heterogeneity problem in data between groups, the data system of the hub base of the cloud is provided. The proposed system is intended to improve the groupware environment including the interoperability of integrated standardized environmental data sharing service.

• 한국BIM학회 논문집
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• 제14권1호
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• pp.30-38
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• 2024

This study aims to propose a smart city governance logic model that can accommodate more diverse information service systems by mixing hub-and-spoke and blockchain technologies as a data management model. Specifically, the research focuses on deriving the logic of an operating system that can work across smart city planning based on the two data governance technologies. The first step of the logic is the generation and collection of information, which is first divided into information that requires information protection and information that can be shared with the public, and the information that requires privacy is blockchainized, and the shared information is integrated and aggregated in a data hub. The next step is the processing and use of the information, which can actively use the blockchain technology, but for the information that can be shared other than the protected information, the governance logic is built in parallel with the hub-and-spoke type. Next is the logic of the distribution stage, where the key is to establish a service contact point between service providers and beneficiaries. Also, This study proposes the establishment of a one-to-one data exchange relationship between information providers, information consumers, and information processors. Finally, in order to expand and promote citizen participation opportunities through a reasonable compensation system in the operation of smart cities, we developed virtual currency as a local currency and designed an open operation logic of local virtual currency that can operate in the compensation dimension of information.

• 한국중재학회지:중재연구
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• 제12권2호
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• pp.185-220
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• 2003

Korean Government is increasingly focusing on the Northeast Asia Business and Logistics Hub strategy to create a competitive advantage. A key element of this strategy is creating or leveraging distribution and logistics hubs that act as centres for distribution in Northeast Asia. A Northeast Asian e-Hub Policy is required for business hub and logistics hub in the Northeastern Asia. An e-Hub is an integrated, sophisticated set of e-Biz, information and e-trade facilities and services that provides access to a marketplace and exchangee the e-trade data. To study the e-Hub policy, Pan Asian e-Commerce Alliance, Korea-Japan e-Trade Hub project, and ASEM e-Trade project are considered. E-trade via cyberspace may need new methods of dispute resolution to reduce transaction costs for small value-related disputes and to erect structures that work well across national boundaries. Voluntary Mediation Councils and cyber tribunals should be encouraged by governmental sectors to continue developing private sector mechanisms to resolve e-trade disputes. Government-sponsored online cross-border dispute resolution systems may be also be useful to complement these private sector approaches. E-trade in Northeast Asia results in disputes owing to the incompleteness of e-trade law in the countries. These disputes contain disputes regarding e-trade model, central title registry, authentication body. To resolve these disputes in the Northeast Asia, a variety of electronic alternative dispute resolution bodies must be organized under cooperation of Korea, Japan, China. This study deals with the e-ADR construction in the Northeast Asia to resolve the disputes in the e-trade and to activate the e-trade in the Northeast Asia.

• 한국정보통신학회논문지
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• 제11권11호
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• pp.2047-2058
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• 2007

기업의 업무 환경이 지리적, 공간적으로 분산된 환경에서는 데이터 통합 시 발생되는 데이터 소스들을 표준 규칙과 메타데이터에 여과시켜서 중복성을 제거하고 데이터의 통합과 단일 뷰어를 제공하기에는 어려움이 따른다. 특히 이질적인 시스템이나 다양한 어플리케이션에서 나오는 대량의 데이터를 종류와 형식에 관계없이 호환이 가능하고, 지속적으로 정확한 통합 정보를 실시간으로 동기화할 수 있는 것이 관건이다. 따라서, 본 논문에서는 레거시 시스템간의 데이터 공유 및 교환에서 발생하는 의미적 상호 운용성의 문제점을 극복하는 SQL/XMDR 메시지 기반의 데이터 허브 시스템을 제안한다. 이 시스템은 데이터 협업 시 실시간으로 변화는 데이터를 일관성 있게 유지하기 위해서 질의 변환 방법인 메시지 사상 기법을 제시하여 이용한다. 이는 레거시 시스템들 간의 협업에 필요한 데이터를 공유 및 교환 하는데 실시간으로 변화하는 데이터를 일관성 있게 유지 할 수 있으며, 통합 검색 시 단일 인터페이스를 제공하여 각 시스템의 독립성을 유지하면서 데이터의 투명성과 가용성을 향상 시킬 수 있다.

• 융합정보논문지
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• 제11권9호
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• pp.138-144
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• 2021

전자부품 조립사업은 제품불량이 발생했을 때, 입고된 원자재불량 또는 작업불량을 추적하는 것이 중요하며, 결과에 따라 납품업체 또는 작업현장 개선이 중요하다. 스마트팩토리의 핵심 과제는 데이터 통합허브를 구축하여 저장·관리·분석을 실시간으로 처리하고 클러스터공정, 에너지, 환경, 안전을 통합관리 하는 것이다. 전자부품 관련 중소기업에 생산현장관리를 실시간 모니터링하여 생산데이터의 정확한 분석과 수집으로 신뢰도를 향상시키기 위해서는 스마트팩토리 구축이 필수적이다. 본 논문은 스마트팩토리를 도입하고자 하는 전자 부품관련 중소기업의 특성을 고려해 시스템 구성방법, 스마트팩토리 관련기술 과 적용사례 등을 정의하여 구축에 활용토록 개발되었다.

• ETRI Journal
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• 제45권1호
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• pp.18-27
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• 2023

We present an English-Korean speech translation corpus, named EnKoST-C. End-to-end model training for speech translation tasks often suffers from a lack of parallel data, such as speech data in the source language and equivalent text data in the target language. Most available public speech translation corpora were developed for European languages, and there is currently no public corpus for English-Korean end-to-end speech translation. Thus, we created an EnKoST-C centered on TED Talks. In this process, we enhance the sentence alignment approach using the subtitle time information and bilingual sentence embedding information. As a result, we built a 559-h English-Korean speech translation corpus. The proposed sentence alignment approach showed excellent performance of 0.96 f-measure score. We also show the baseline performance of an English-Korean speech translation model trained with EnKoST-C. The EnKoST-C is freely available on a Korean government open data hub site.

• Journal of Korean Neurosurgical Society
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• 제65권5호
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• pp.697-709
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• 2022

Objective : The present study aimed to identify the function of ischemic stroke (IS) patients' peripheral blood and its role in IS, explore the pathogenesis, and provide direction for clinical research progress by comprehensive bioinformatics analysis. Methods : Two datasets, including GSE58294 and GSE22255, were downloaded from Gene Expression Omnibus database. GEO2R was utilized to obtain differentially expressed genes (DEGs). Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis of DEGs were performed using the database annotation, visualization and integrated discovery database. The protein-protein interaction (PPI) network of DEGs was constructed by search tool of searching interactive gene and visualized by Cytoscape software, and then the Hub gene was identified by degree analysis. The microRNA (miRNA) and miRNA target genes closely related to the onset of stroke were obtained through the miRNA gene regulatory network. Results : In total, 36 DEGs, containing 27 up-regulated and nine down-regulated DEGs, were identified. GO functional analysis showed that these DEGs were involved in regulation of apoptotic process, cytoplasm, protein binding and other biological processes. KEGG enrichment analysis showed that these DEGs mediated signaling pathways, including human T-cell lymphotropic virus (HTLV)-I infection and microRNAs in cancer. The results of PPI network and cytohubba showed that there was a relationship between DEGs, and five hub genes related to stroke were obtained : SOCS3, KRAS, PTGS2, EGR1, and DUSP1. Combined with the visualization of DEG-miRNAs, hsa-mir-16-5p, hsa-mir-181a-5p and hsa-mir-124-3p were predicted to be the key miRNAs in stroke, and three miRNAs were related to hub gene. Conclusion : Thirty-six DEGs, five Hub genes, and three miRNA were obtained from bioinformatics analysis of IS microarray data, which might provide potential targets for diagnosis and treatment of IS.

• Asian Pacific Journal of Cancer Prevention
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• 제17권3호
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• pp.1003-1008
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• 2016

Breast cancer is now the leading cause of cancer death in women worldwide. Cancer progression is driven not only by cancer cell intrinsic alterations and interactions with tumor microenvironment, but also by systemic effects. Integration of multiple profiling data may provide insights into the underlying molecular mechanisms of complex systemic processes. We performed a bioinformatic analysis of two public available microarray datasets for breast tumor stroma and peripheral blood mononuclear cells, featuring integrated transcriptomics data, protein-protein interactions (PPIs) and protein subcellular localization, to identify genes and biological pathways that contribute to dialogue between tumor stroma and the peripheral circulation. Genes of the integrin family as well as CXCR4 proved to be hub nodes of the crosstalk network and may play an important role in response to stroma-derived chemoattractants. This study pointed to potential for development of therapeutic strategies that target systemic signals travelling through the circulation and interdict tumor cell recruitment.

• 대한조선학회논문집
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• 제35권2호
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• pp.51-62
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• 1998

본 연구에서는 공동수조(Cavitation Tunnel) 실험용 모형프로펠러의 5축 가공을 위해 Windows NT와 PC 환경하에서 작동하는 CAD/CAM 시스템을 개발하였다. 본 시스템은 그 성격에 따라 크게 4가지의 모듈로 구성되어 있다. 먼저, 프로펠러 설계를 위해 기존에 사용하고 있던 텍스트 위주의 S/W(Text based S/W)를 그래픽화 하여 통합함으로써 설계의 효율을 향상시켰다. 설계의 결과로 출력되는 점 데이터는 NURBS(Non-Uniform Rational B-Spline) 방법을 이용하여 복합곡면 (Composite Surface)으로 모델링하였고 가공은 황삭, 중삭, 정삭 및 잔삭으로 수행하였다. 각각의 경우에 있어서 공구와 공작물의 충돌 및 간섭을 체크하여 공구경로를 산출하였으며 그것을 역기 구학 해석하여 NC 데이터로 변환하였다. 또한, 가공의 상태를 화면상에서 검증하기위해 공구 및 공작물을 그래픽화하여 NC 데이터를 검증할 수 있도록 하였다. 끝으로 5축 가공의 가공 효율을 최대화하기 본 연구에서는 공동수조 실험용 모형프로펠러의 5축 가공을 위해 Windows NT와 PC 환경하위해 실험을 통하여 최적의 절삭조건을 선정하고 이를 시스템내에 데이터베이스화 함으로써 설계부터 가공까지를 자동으로 수행할 수 있는 시스템으로 구축하였다.