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강대석,민일규,이승휘,옥치율 東亞大學校 海洋資源硏究所 2003 硏究論文集 Vol.15 No.-
In this study, Development The Rating-Curve Formula through to enforce the discharge investigator on Samrangjin Point. As use the result, We earning rationality, Economical irrigation and establishment a water control project, the basic material of determines hydraulic capacity to design water resources structure. At the same time, We can use The Rating-curve for a high efficient Flood wamning forecast in Nak-Dong River. The result and opinion of the discharge investigator is as follow: 1. The Rating-Curve Formula is Q=(-1065.91941)+1137.237287H+4.671360913H³(1.27<H<9.57) 2. A periodical and continuously management make a routine check over a watermark. 3. When enforce the discharge inverstigator, it require many time, person and equipment. So we can get accuracy and safety working conditions by assist a new system equipment to amount of flowing water measurement. 4. We must sublate to prepare the river bed or collect aggregate as possible, for the upper and downstream section in the established point of a watermark .
도근영,김가현,이승휘,옥치율,강대석 東亞大學校 海洋資源硏究所 2003 硏究論文集 Vol.15 No.-
This study started with the measured experiment of climatic characteristic at the coastal reclamation area formed by the reclamation and development which is inevitable selection presently. As a result of the examination, the climate variation is predicted to be large in summer and the salt concentration is shown in the order of top layer, bottom layer and intermediate layer. Therefore, the greens space and wind path are occupied at the coastal reclamation.
강대석(Dae-Seok Kang),민일규(ILL-kyu Min),이승휘(Sung-Hee Lee),옥치율(Chi-Yool Ok) 동아대학교 해양자원연구소 2003 동아대학교 해양자원연구소 연구논문집 Vol.15 No.-
In this study, Development The Rating-Curve Formula through to enforce the discharge investigator on Samrangjin Point. As use the result, We earning rationality, Economical irrigation and establishment a water control project, the basic material of determines hydraulic capacity to design water resources structure. At the same time, We can use The Rating-curve for a high efficient Flood warnning forecast in Nak-Dong River. The result and opinion of the discharge investigator is as follow: 1. The Rating-Curve Formula is Q=(-1065.91941)+1137.237287H+4.671360913H³(1.27<H<9.57) 2. A periodical and continuously management make a routine check over a watermark. 3. When enforce the discharge inverstigator, it require many time, person and equipment. So we can get accuracy and safety working conditions by assist a new system equipment to amount of flowing water measurement. 4. We must sublate to prepare the river bed or collect aggregate as possible, for the upper and downstream section in the established point of a watermark.
Sn-3Ag-0.5Cu Solder에 대한 무전해 Ni-P층의 P함량에 따른 특성 연구
신안섭,옥대율,정기호,김민주,박창식,공진호,허철호,Shin, An-Seob,Ok, Dae-Yool,Jeong, Gi-Ho,Kim, Min-Ju,Park, Chang-Sik,Kong, Jin-Ho,Heo, Cheol-Ho 한국전기전자재료학회 2010 전기전자재료학회논문지 Vol.23 No.6
ENIG (electroless Ni immersion gold) is one of surface finishing which has been most widely used in fine pitch SMT (surface mount technology) and BGA (ball grid array) packaging process. The reliability for package bondability is mainly affected by interfacial reaction between solder and surface finishing. Since the behavior of IMC (intermetallic compound), or the interfacial reaction between Ni and solder, affects to some product reliabilities such as solderability and bondability, understanding behavior of IMC should be important issue. Thus, we studied the properties of ENIG with P contents (9 wt% and 13 wt%), where the P contents is one of main factors in formation of IMC layer. The effect of P content was discussed using the results obtained from FE-SEM(field-emission scanning electron microscope), EPMA(electron probe micro analyzer), EDS(energy dispersive spectroscopy) and Dual-FIB(focused ion beam). Especially, we observed needle type irregular IMC layer with decreasing Ni contents under high P contents (13 wt%). Also, we found how IMC layer affects to bondability with forming continuous Kirkendall voids and thick P-rich layer.
도근영(Doe Geun-Young),김가현(Kim Ga-Hyun),이승휘(Lee Seoung-Hwi),옥치율(Ok Chi-Yool),강대석(Kang Dae-Suck) 동아대학교 해양자원연구소 2003 동아대학교 해양자원연구소 연구논문집 Vol.15 No.-
This study started with the measured experiment of climatic characteristic at the coastal reclamation area formed by the reclamation and development which is inevitable selection presently. As a result of the examination, the climate variation is predicted to be large in summer and the salt concentration is shown in the order of top layer, bottom layer and intermediate layer. Therefore, the greens space and wind path are occupied at the coastal reclamation.