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정홍도(Hongdo Jung),신용한(Younhan Shin),박진관(Chenkwan Park),정효민(Hyomin Jeong),정한식(Hanshik Chung) 대한설비공학회 2012 설비공학 논문집 Vol.24 No.10
Heating pipes burst was occurred in the apartment complex that was applied floor radiant heating system. There were two opinions for the cause of the bursted heating pipes that was the flaw during construction and defects in the product and also there were conflicting among them. Officials analyzed it in order to investigate the cause of the rupture. Tensile test results showed different tensile strength between the lower part of heating pipe and the upper part of heating pipes. The lower tensile strength is maintained while the top was not secured. The reason why rupture heating pipes is that flow velocity isn’t secured and then the air get stagnant. Stagnant air makes hardening. It is caused rupturing. The proper flow rate was confirmed 0.166 m/sec after experiment. It isn’t make stagnant air inside heating pipes.
鄭洪 계명대학교 산업기술연구소 1990 産業技術硏究所 論文報告集 Vol.13 No.2
The software world has run into the software crisis : ambitious software projects are hard to manage, too expensive, of mediocre quality, and hard to schedule reliably. Object-oriented programming is party a point of view. there are many different views of what objet-oriented programming is as there are computer scientists and programmers. This paper presents object-oriented programming concepts and deals with the related notions of object class, inheritance message and method, and also describes how they support the building of software. I will stress the differences between an object-oriented programming and the more conventional procedure-oriented programming. Object-oriented programming provides major advantages in the production and maintenance : shorter development times, a high degree of code sharing, and malleability. These advantages make object-oriented programming an important technology for building complex software systems.
電子計算室에 있어서 資料의 事故防止 및 復舊에 관한 對策 硏究
鄭洪 계명대학교 산업기술연구소 1985 産業技術硏究所 論文報告集 Vol.7 No.-
As computer system become more critical to the operation of organizations, the need to ensure protection and security of data they process becomes more evident. In addition, data security is critical where issues of personal may arise. The safeguarding of an organization's information and data asset in the interactions between people and computer is the theme of this paper, and it provides a detailed treatment of the topics of data security and protection from the improper use of data including discussion of protection from damage due to natural causes-fire, storm, and so forth.