• 한국CDE학회논문집
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• 제8권4호
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• pp.231-242
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• 2003

Multidisciplinary Design Optimization (MDO) is an optimization technique considering simultaneously multiple disciplines such as dynamics, mechanics, structural analysis, thermal and fluid analysis and electromagnetic analysis. A software system enabling multidisciplinary design optimization is called MDO framework. An MDO framework provides an integrated and automated design environment that increases product quality and reliability, and decreases design cycle time and cost. The MDO framework also works as a common collaborative workspace for design experts on multiple disciplines. In this paper, we present the architecture for an MDO framework along with the requirement analysis for the framework. The requirement analysis has been performed through interviews of design experts in industry and thus we claim that it reflects the real needs in industry. The requirements include integrated design environment, friendly user interface, highly extensible open architecture, distributed design environment, application program interface, and efficient data management to handle massive design data. The resultant MDO framework is datasever-oriented and designed around a centralized data server for extensible and effective data exchange in a distributed design environment among multiple design tools and software.

• 한국CDE학회논문집
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• 제11권3호
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• pp.183-196
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• 2006

A new operation strategy. which can guarantee the data consistency of engineering information among the various intelligent information systems, is presented for engineering information of bridges, and construction methodology of integrated database is developed to support the strategy. The two core standard techniques are adopted to construct the integrated database. One is the Standard for the Exchange of Product Model Data (STEP) for CAD/CAE information and the other is the Extensible Markup Language(XML) for engineering document information. The former enabler structural engineers to handle the structural details with three-dimensional geometry-based information of bridges, and ACIS solid modeling kernel is employed to develop AutoCAD based application modules. The latter can make document files into data type for web-based application modules which assist end-users to search and retrieve engineering document data. In addition, relaying algorithm is developed to integrate the two different information, e.g. CAD/CAE information and engineering document information. The pilot application modules are also developed, and a case study subjected to the Han-Nam bridge is presented at the end of the paper to illustrate the use of the developed application modules.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2006년도 정기 학술대회 논문집
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• pp.208-215
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• 2006

This study provides a new operation strategy which can guarantee the data consistency of engineering information among the various intelligent information systems. We present the strategies for the operation of bridges engineering information and the construction methodology of integrated database. The two core standard techniques are adopted to construct the integrated database. One of these standards is the Standard for the Exchange of Product Model Data (STEP) for CAD/CAE information and the other is the Extensible Markup Language (XML) for engineering document information. This study can transform a document me into a data type for web-based application modules which assist end-users in searching and retrieval of engineering document data. In addition, relaying algorithm is developed to integrate the two different information, e.g. CAD/CAE information and engineering document information. The pilot application modules for management and maintenance of existing bridge are also developed to show application of the strategy.

• 융합경영연구
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• 제7권1호
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• pp.1-14
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• 2019

Purpose - Currently, the economic globalization has become a common channel for China's enterprise to perform the international economic activities. Due to this background, this paper tries to analyze the influence of internationalization level on operation performance of enterprises. Research design, data, and Methodology - This paper aims at 296 companies going listed in Shanghai Stock Exchange and Shenzhen Stock Exchange. The data about the listed companies during the 12 years from 2005 to 2016 have been collected. Relevant theories, including the theory of comparative advantage, monopolistic advantage and product life cycle in developed countries as well as the small scale technology and state on localized technological capacities in developing countries, have been summarized to provide theoretical basis for the influence of international operation on operation performance of the enterprises. Moreover, the current status of international operation of China's enterprises, including the dynamic cause of the internationalization of China's enterprises, its competitive advantage and disadvantage as well as the interest and potential risk of the internationalization, have been also analyzed. Results - Via adopting the panel data to conduct an empirical analysis, It can be found that the relationship between international operation level and operation performance of China's enterprises can be expressed as the S-curve of declining, rising and declining again. Conclusions - This paper has taken the lead in using Ohlson corporate value model to fill the gap in the relevant researches in China. It can also provide guidance for the international operation of China's enterprises. Meanwhile, the two systems for international operation and performance evaluation index have been put forward. The performance of international operation can be classified as financial performance or corporate value so that the operation effect of those China's enterprises going abroad can be better evaluated.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2002년도 학술대회지
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• pp.99-106
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• 2002

최근 건설 정보 통합 모델에 설계 요소를 반영하는 개념이 발표되고, 4D CAD 시스템을 이용한 정보 통합에 대한 연구들이 수행되었으며, 현재까지 그 활용분야를 넓히고 있다. 하지만, 이러한 형태의 정보통합은 특정 응용 프로그램을 중심으로 이루어지기 때문에 각 조직만의 독특한 내용적 특성을 반영할 수 없으며, 기존의 프로그램과 다른 새로운 프로그램의 도입 및 개발에 따른 유지, 보수 비용을 요구하는 등의 단점이 있다. 본 연구에서는 이러한 문제들을 해결하기 위하여 정보통합을 위한 새로운 접근 방법으로써 '프로덕트 모델 중심의 설계, 시공 정보 통합 방법론'을 제시하고 이에 대한 비교 평가를 위하여 기존의 방법론에 대한 선행 연구를 수행하였다. 이를 위하여 현재 설계, 공정 정보의 통합을 위하여 널리 사용되고 있는 4D CAD 개념을 조사, 분석하였다. 연구 분석 결과 기존의 통합 방법론은 여러가지 장점이 있었지만, 전체 건설사업의 생애주기 중 후반부에 통합이 이루어지기 때문에 정보 활용의 기회가 적으며, 후속단계에서 원시정보의 활용이 미흡하고, 통합 정보의 활용 범위가 상용프로그램이 제공하는 기능으로 제한되고, 3차원 프로덕트 모델에 대한 관리가 곤란하였다. 이러한 단점을 해결하기 위한 설계, 시공 정보의 통합을 위한 새로운 방법론을 제시하였다. 제안된 방법론은 '일관된 객체 기반의 그래픽 모델링', '이질적인 프로덕트 정보들의 저장', '프로덕트 모델을 활용한 정보의 생성, 통합', '확장된 프로덕트 모델의 관리' 등의 4 부분으로 나누어서 제안하였으며, 마지막으로 이들에 대한 활용 개념을 기존의 업무에서의 활용과 새롭게 보충되는 업무에서의 활용으로 나누어서 제안하였다. 6장에서는 본 논문의 전체적인 요약과 후속 연구 주제들과 이를 위한 제안을 하였다. 본 연구를 통해서 특정 응용프로그램 중심의 통합이 아닌 프로덕트 모델 중심의 설계, 시공정보 통합을 위한 새로운 통합 방법론을 제시하였으며, 본 방법론을 통해서 실제로 사용하고 있는 프로그램들을 활용하면서, 각 조직의 환경에 적합한 정보 통합을 통해 건설 생산성 향상을 기대할 수 있게 되었다.

• 한국CDE학회논문집
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• 제4권4호
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• pp.371-380
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• 1999

This study proposes a process information model which can integrate various activities during the product development process, the system which can manage the process. Development process information will allow designers and managers to access previous tasks readily and utilize the information in making decisions at hand. While developing products in heterogeneous and distributed environments, concurrent and collaborative designs can be achieved by STEP. The process model in this study divides the task of product development into two fundamental parts, Specific Process(SP) and Normal Process(NP). SP includes the specific information and refer to those defined by prior STEP. NP is routine process excluded from being defined as SP. Due data information can be added to manage development pace and to show delayed tasks. As two or more different processes can be linked to show the entire development flow, Static STEP information can be dynamically interlaced. Remote location operations can be incorporated on the Internet using STEP, and information can be shared. The system has been built upon a process model schema so that task stage, design history, and different development style can be managed and accessed for each component. The system has been proven efficient in information management and exchange by several scenario testings.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권11호
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• pp.3694-3722
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• 2022

In today's globalized world, there is no transparency in exchanging data and information between producers and consumers. However, these tasks experience many challenges, such as administrative barriers, confidential data leakage, and extensive time delays. To overcome these challenges, we propose a decentralized, secured, and verified smart chain framework using Ethereum Smart Contract which employs Inter Planetary File Systems (IPFS) and MongoDB as storage systems to automate the process and exchange information into blocks using the Tendermint algorithm. The proposed work promotes complete traceability of the product, ensures data integrity and transparency in addition to providing security to their personal information using the Lelantos mode of shipping. The Tendermint algorithm helps to speed up the process of validating and authenticating the transaction quickly. More so in this time of pandemic, it is easier to meet the needs of customers through the Ethermint Smart Chain, which increases customer satisfaction, thus boosting their confidence. Moreover, Smart contracts help to exploit more international transaction services and provide an instant block time finality of around 5 sec using Ethermint. The paper concludes with a description of product storage and distribution adopting the Ethermint technique. The proposed system was executed based on the Ethereum-Tendermint Smart chain. Experiments were conducted on variable block sizes and the number of transactions. The experimental results indicate that the proposed system seems to perform better than existing blockchain-based systems. Two configuration files were used, the first one was to describe the storage part, including its topology. The second one was a modified file to include the test rounds that Caliper should execute, including the running time and the workload content. Our findings indicate this is a promising technology for food supply chain storage and distribution.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.1130-1137
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• 2022

The Industry Foundation Classes (IFC) provides standardized product models for the building construction domain. However, the current IFC schema has limited representation for infrastructure. Several studies have examined the data schema for road and highway modeling, but not in a sufficiently comprehensive and robust manner to facilitate the overall integrated project delivery of road projects. Several discussions have focused on slope engineering for road projects, but no solution has been provided regarding the formalized parametric modeling up to now. Iterative design, analysis, and modification are observed during the process of slope design for road projects. The practitioners need to carry out the stability analysis to consider different road design alternatives, including horizontal, vertical, and cross-section designs. The procedure is neither formalized nor automated. Thus, there is a need to develop the formal representation of the product and process of slope analysis for road design. The objective of this research is to develop a formal representation (i.e., an IFC extension data schema) for slope analysis. It consists of comprehensive information required for slope analysis in a structured manner. The deliverable of this study contributes to both the formal representation of infrastructure development and, further, the automated process of slope design for road projects.

• 벤처창업연구
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• 제13권1호
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• pp.119-129
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• 2018

어느 때보다도 불확실해진 시장환경과 더욱더 복잡해지는 소비자의 요구는 신제품 개발의 중요성을 증대시키고 있다. 하지만, 점차 좁아지는 기술격차와 빨라지는 제품의 수명주기는 기업들로 하여금 외부조직과 연합을 통해 부족한 지식을 보완하는 현상을 가져왔다. 그러나 이러한 현상은 다른 조직과 지식의 교환과 조합이란 새로운 문제를 부각시키게 되었다. 신제품을 개발하기 위한 지식의 교환과 조합을 통해 가치있는 지식을 만들기 위해서는 지식 수령자의 흡수역량이 중요하게 고려되어야 하지만, 동시에 지식 전달자의 특징인 지식보호성향도 놓쳐서는 안된다. 하지만 이러한 요소를 동시에 고려한 연구는 매우 제한적이었다. 본 연구는 신제품 공동개발 과정에서 공급자의 흡수역량과 구매자의 지식보호성향이 신제품 개발성과에 어떠한 영향을 미치는지 알아보았다. 더불어 공급자의 흡수역량과 구매자의 지식보호성향의 상호작용효과에 대해서도 연구하였다. 이를 위해 신제품 공동개발이 자주 발생하는 자동차산업, 전자산업, 방위산업을 대상으로 자료를 수집하였으며 조절회귀분석으로 통계적 검증을 실시하였다. 연구결과 공급자의 흡수역량은 신제품 개발성과와 긍정정 관계가 있었으며, 구매자의 지식보호성향은 신제품 개발성과와 부정적 관계가 있는 것으로 밝혀졌다. 아울러 공급자의 흡수역량과 구매자의 지식보호성향이 신제품 개발결과에 상호작용 효과를 갖는 것으로 나타났다. 이러한 결과는 신제품 공동개발 시 공급자의 흡수역량이 중요한 요소로 작용하지만, 우수한 흡수역량을 가진 공급자라도 구매자가 지식 전달에 부정적인 자세를 가질 경우 신제품 개발성과에 부정적 영향을 미칠 수 있음을 시사한다.

• 한국항해항만학회지
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• 제28권8호
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• pp.673-678
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• 2004

전자해도의 표준 형식인 S-57은 수로 데이타의 교환을 위한 표준이다. 이에 따라 제작된 항해용 디지털 해도를 전자해도(ENC: Electronic Navigational Chart)라 하며, 전자해도를 공간 정보의 표현에 적절한 컴퓨터 자료 구조로 변환 한 것을 SENC(System ENC)라 부른 다. SENC는 시스템 제조업체마다 고유한 알고리듬으로 제작되는데, ECDIS(Electronic Chart Display and Information System) 성능에 주요한 역할을 하는 요소임에도 불구하고 아직까지 SENC의 구조의 설계 및 구현에 관한 연구는 발표된 바가 없는 실정이다. 본 연구에서는 새로이 고안한 Mesh 구조를 이용한 SENC 구조를 설계하였고, 이를 Display 할 수 있는 시스템을 구현하여 PDA 및 데스크탑 컴퓨터에서 동작 결과를 확인하였다.