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고객중심의 업무프로세스 재설계 -분할측량업무를 중심으로-
윤정환,우인제,이보미 한국국토정보공사 2008 지적과 국토정보 Vol.38 No.1
본 연구는 지적공사가 지속가능경영을 성취하기 위해 향후의 지적측량이 나아가야 할 고객중심의 업무처리 프로세스는 어떤 것인지를 연구하고 제시하고 있다. 첫째, 현재의 분할측량 업무와 신규 필지의 등기 업무가 어떻게 처리되어지는지 표준안을 작성하고, UML 기법을 이용해 모형화(modeling)하여 제시했다. 다음으로는 고객중심의 업무처리 프로세스 재설계를 위해서 네덜란드 지적청 (Dutch Kadaster)을 벤치마킹 하였다. 끝으로, 분할측량 업무프로세스를 재설계하여 완전 자동화에 바탕을 둔 개선안을 제시하였다. This research studies about the customer oriented business process for being achieved the Sustainable Management of KCSC and provides the way how to achieve it. First, the standardized Business Processes are depicted by the UML modeling technique to explain the current business processes of the Parcel Subdivision and Land Registry. Next, the Netherlands Cadastre Agency (Dutch Kadaster) is benchmarked for re-engineering to achieved the Customer Oriented Business Process. Finally, Improved Business Process is suggested by the re-engineering of the Parcel Subdivision Business Process based on the Conceptual idea of the fully automated procedure.
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윤정환,Yoon, Chung-Han The Korean Society of Economic and Environmental G 1995 자원환경지질 Vol.28 No.6
한국 남서부에 위치한 해남지역에는 산성마그마 활동에 수반된 acid-sulfate 점토광상들이 산출되고 있다. 연구지역의 지질은 응회암, 화강암질암, 석영반암, 유문암, 안산암 및 퇴적암으로 구성되어 있으며 화강암질암과 석영반암은 응회암과 퇴적암을 관입하며 광산주변의 유문암과 응회암은 열수변질을 받았다. 채취된 시료중 67개의 시료를 GFAAS와 ICP로 주성분 원소함량과 금을 비롯한 미량원소함량을 분석한 결과 금은 성산광산에서 산출되는 명반석맥과 규화작용을 심하게 받은 변질대에서 부화된 반면 dickite와 dickite가 함유된 암석이나 광석이 열수변질을 받은 경우에는 결핍된 경향을 보여주며, 특히 단층주변과 단층들이 교차하는 지점에서 금함량이 높은 경향을 나타낸다. 명반석-석영-황철석이 공생하는 명반석이나 명반석맥에서는 금함량이 높으나 황철석을 포함하는 응회암과 dickite에서는 일반적으로 금함량이 낮은 경향을 보여준다. 규화작용을 받은 응회앙에서 금함량은 As, Hg 및 Hg와 정의 상관관계를 보여 주며 대부분의 시료에서 Cd, Hg 및 Sb함량변화는 금함량변화와 유사한 경향을 나타낸다. 따라서 이 연구지역에서 지질학적 및 지구화학적으로 금광상을 탐사하기 위해서는 단층이 교차하는 지점의 silicified zone 또는 황철석을 함유하는 명반석맥을 찾아서 As, Hg 및 Sb 등과 같은 지시원소를 분석하는 것이 중요할 것으로 판단된다. Several acid-sulfate clay deposits associated with silicic magmas occur in the Haenam area of the southwestern part of Korea. Geology of the studied area consists of tuffs, granitic rocks, quartz porphyry, rhyolite, andesite and sedimentary rocks. The granitic rocks and quartz porphyry intruded tuffs and sedimentary rocks. The rhyolite and tuffs around the mines have undergone hydrothermally weak or strong alteration. Gold contents with major and trace elements have been determined for a total of sixty-seven specimens of fresh igneous rocks, wall rocks and minerals such as dickite and alunite by graphite furnace atomic absorption spectrometer and inductively coupled plasma. Gold is enriched in the alunite vein and the silicified zone, but is depleted in dickites and hydrothermally altered rocks with dickite of the Seongsan deposit. Gold is especially concentrated near the faults or conjunction area of two faults. High content of gold is shown in the mineral assemblages of alunitequartz- pyrite in the alunite vein and silicic zone of the Seongsan deposit compared with that of minerals and rocks from another deposits distributed in the studied area. Gold content in tuffs and dickites with pyrite is generally low. Gold content in silicified tuff tends to show positive correlations with content of As, Hg and Sb. Variation trends of Cd, Hg and Sb are similar to those of gold content. From the result of gold content variations, gold may be transported and concentrated by mineralizing solutions ascending along the cracks like fault. Therefore, it is important to survey alunite vein and silicified zone at the conjunction of faults, and to analyze pathfinder elements such as As, Hg and Sb for geological and geochemical exploration of gold in the studied deposits.
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윤정환,유동진,송인섭,양동열,이장희,Yoon, J.W.,Yoo, D.J.,Song, I.S.,Yang, D.Y.,Lee, J.H. 한국정밀공학회 1994 한국정밀공학회지 Vol. No.
An equilibrium approach is suggested as an effective tool for the analysis of sheet metal forming processes on the basis of force balance together with geometric relations and plasticity theroy. In computing a force balance equation, it is required to define a geometric curve approximating the shape of the sheet metal at any step of deformation from the geometric interaction between the die and the deforming sheet. Then the geometic informations for contacting and non-contacting sections of the sheet metal such as the number and length of both non-contact region, contact angle, and die radius of contact section are known from the geometric forming curve and utilized for optimization by force balance equation. In computation, the sheet material is assumed to be of normal amisotropy and rigid-phastic workhardening. It has been shown that there are good agreements between the equilibrium approach and FEM computation for the benchmark test example and auto-body panels whose sections can be assumed in plane-strain state. The proposed equilibrium approach can thus be used as a robust computational method in estimating the forming defects and forming severity rather quickly in the die design stage.
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Seven-year Survival Rate of On-line Hemodiafiltration
윤정환,김남호 대한의생명과학회 2019 Biomedical Science Letters Vol.25 No.1
Conventional high-flux hemodialysis (HD) is not as good as normal kidney function. Morbidity and mortality rates of patients receiving HD are still very high. To increase mid-to-large molecule clearance by combining diffusion and convection, on-line hemodiafiltration (HDF) is required. The objective of this study was to compare long-term survival rate of patients treated with on-line HDF to those who received conventional high-flux HD by reviewing data from Chonnam National University Hospital (CNUH). We selected patients who attended the 'CUNH dialysis center' and agreed to participate in the study. Overall, 40 patients with ESRD switched from high flux HD to on-line HDF or started on-line HDF from August 2007 to December 2009. Additionally, a total of 42 patients receiving conventional high-flux HD during the same period were enrolled. We then reviewed long-term survival rate of patients receiving on-line HDF over the next seven years. When we compared survival rates for seven years, the survival rate of the group receiving on-line HDF was 65% (26/40) while that of the group receiving the conventional high-flux HD was 54.8% (23/42). Although the number of patients was small to see survival difference clearly by one specific dialysis modality, there was somewhat difference in survival rate between the two groups. Indicators such as anemia, calcium-phosphate metabolism, nutritional status, treatment adequacy, and hospitalization were also improved in the group receiving HDF. Overall, results of our study showed beneficial effects of on-line HDF on clinical outcomes and survival in chronic HD patients.
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