• Journal of Digital Convergence
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• 제11권2호
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• pp.193-203
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• 2013

In our thesis we introduce case study for qualifying university graduates system for efficient maintenance. First, we find out factors to make maintenance difficult and present solution for them. Second, we convert system architecture from algorithm-oriented to driving-engine-based, design DB schema, develop algorithms for important components of proposed system, and implement them. Through results of system operation, we show that our system can reduce maintenance cost fairly.

• Analytical Science and Technology
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• 제15권1호
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• pp.43-53
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• 2002

The analysis of polychlorodibenzo-p-dioxins (PCDDs) and polychlorodibenzo furans(PCDFs) was performed by using four different gas chromatographic columns (SP-2331, DB-5, DB-17 and DB-DIOXIN). The data reported is pertaining to flue gas, fly ash, ambient air, soil and fish. The difference in quantification of samples according to four columns was observed, it was noted that major difference was observed in the flue gas when compared with soil, fly ash, ambient air and fish. The quantification of the same samples according to four columns it was also found that DB-5 column have the highest concentration whereas SP-2331 column showed the lowest concentration. The quantification of DB-17 column for 1,2,3,6,7,8-HxCDF was found to be twice and three times higher when compared with other columns, whereas the quantification of DB-DIOXIN column for 1,2,3,7,8-PeCDD was also found to be over estimated twice when compared with other columns.

• Construction Engineering and Management
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• 제3권1호
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• pp.30-33
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• 2002

• Journal of the Korea Society of Computer and Information
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• 제14권4호
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• pp.101-109
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• 2009

An encryption module is equipped basically at 8i version ideal of Oracle DBMS, encryption module, but a performance decrease is caused, and users are restrictive. We analyze problem of DB security by technology by circles at this paper whether or not there is an index search, object management disorder, a serious DB performance decrease by encryption, real-time data encryption beauty whether or not there is data approach control beauty circular-based IP. And presentation does the comprehensive security Frame Work which utilized the DB Masking technique that is an alternative means technical encryption in order to improve availability of DB security. We use a virtual account, and set up a DB Masking basis by security grades as alternatives, we check advance user authentication and SQL inquiry approvals and integrity after the fact through virtual accounts, utilize to method as collect by an auditing log that an officer was able to do safely DB.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 한국건설관리학회 2007년도 정기학술발표대회 논문집
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• pp.495-498
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• 2007

The latest parceling-out price upper limit ancestor memorial service enforcement, Sale in lots circle is elated interest of society each floor for construction working expenses by open etc. but private investment law for society basis facilities, because circle that is presenting in parceling-out price upper limit ancestor memorial service back is different system (configuration item), cross is expected. A lot of study results connected with cost control expense arbor in the mountains etc. were presented until present, but persistent DB expulsion prohibition. Cost information is standardization unpreparedness of system. It is real condition that is hoarded since research and development by practical use plan presentation unpreparedness etc. Therefore, in this study, desire does actual date use plan presentation by purpose through DB construction after process by information form of good quality so that can collects efficiently and manages and utilizes at construction production step flag firm' s results data which is achieved. Can utilize to data of tool development that maximize ultimately comprehension about employer' s business and business order ability through persuasion, and diverts in cost control business hereafter.

• Korean Journal of Construction Engineering and Management
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• 제13권5호
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• pp.12-24
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• 2012

The Risks in undertaking a construction project comes from many sources and often involves many participants in the project. This study has identified various kinds of risks, assessed the risk factors quantitatively and suggested risk management method for response pertinent in Design Build(Turn Key)type of projects in Korean context. A questionnaire was designed comprising of 145 possible risks in all types of construction projects. The population from owner, consultant and contractor groups was asked to indicate the risks applicable in DB projects. 25 numbers of critical risks in DB projects were identified and further analyzed for reveling inherent relationship between them through factor analysis. Factor analysis revealed 8 risk factors in DB projects. Construction site related, contract related and design related risk factor consisted about 72% of total risk weight. It has been found out about 6%, while considering the mutual dependency, it is about 10% of total cost of DB project. Therefore, It is suggested that 6% to 10% of construction amount as contingency has to be made provision for risk responses in the DB projects.

• Journal of the Korea Institute of Information Security & Cryptology
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• 제14권6호
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• pp.31-45
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• 2004

Public Key Infrastructure(PKI) provides a strong authentication. Privilege Management Infrastructure(PMI) as a new technology can provide user's attribute information. The main function of PMI is to give more specified authority and role to user. To authenticate net and role, we have used digital signature. Role Based Access Control(RBAC) is implemented by digital signature. RBAC provides some flexibility for security management. NEIS(National Education Information System) can not always provide satisfied quality of security management. The main idea of the proposed RNEIS(Roll Based NEIS) is that user's role is stored in AC, access control decisions are driven by authentication policy and role. Security manager enables user to refer to the role stored in user's AC, admits access control and suggests DB encryption by digital signature.

• Proceedings of the Korean Institute of Building Construction Conference
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• 한국건축시공학회 2008년도 춘계 학술논문 발표대회
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• pp.177-181
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• 2008

Recently, amount of High-Rise Mixed-use Building is Increasing based on Preference of comfortable residence and good view. Government policies were turned to prefer about High-Rise Mixed-use Building because of decreased real estate Condition. But these changes have revealed that it has many maintenance problems for example- efficiency, economic, environmental problems. This paper suggests that the Database System based on various alternatives and real case. And it will be a tool in the scientific decision and value analysis from the facility management to make optimized decision.

• Proceedings of the KIEE Conference
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• 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.227-229
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• 2001

In recent years, studies on virtual reality and web 3D have been progressed and got a eye-opening progress in the field. In this paper, to improve a process of In-Service Inspection work for a nuclear power plant, we developed a virtual ISI DB management system by using virtual reality technology. This management system provides a high degree of efficiency for In-Service Inspection process and makes inspectors comfortable in web environment. This paper will be hope to activate a introduction of VR technology to the domestic industry.

• Proceedings of the Korea Information Processing Society Conference
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• 한국정보처리학회 2015년도 추계학술발표대회
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• pp.1262-1264
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• 2015

최근 국내 재난발생의 빈도가 잦고 이를 해결하기 위한 재난대응 담당자들의 역량에 대한 관심이 높아지면서 재난역량을 강화하기 위한 교육 및 훈련에 대한 체계 정립이 강화되고 있다. 본 연구는 실제 재난발생사례 및 추이 분석을 통한 대규모 국가재난으로 전개 가능한 시나리오를 개발하고, 시나리오 전개에 따른 현대비수준과의 갭을 분석하여 재난관리책임기관의 대응역량 강화 방안을 마련하는 것을 연구 목표로 하고 있다. 이를 위해 여러 가지 재난 유형 중 최근 위험성이 커지고 있는 "화학유해물질 유출사고"에 관한 재난 상황 시나리오를 개발하여 시나리오의 재난요인 변수 데이터가 재난책임 담당자의 대응에 어떤 영향을 미치는지 살펴보고, 재난요인 변수 DB를 활용하여 재난대응역량 강화에 대한 방안을 제공한다.