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주용진(Joo, Yong Jin),김강수(Kim, Kang Soo),함창학(Hahm, Chang Hahk) 대한공간정보학회 2012 대한공간정보학회지 Vol.20 No.3
최근, 국가공간정보 사업의 효율적인 투자와 성공적인 사업추진을 위해 3차원 공간정보 구축에 대한 관심과 대상 사업의 투자 타당성을 판단하기 위한 경제성 분석 과정이 중요시 여겨지고 있다. 이에 본 연구에서는 3차원 공간 정보 (정사영상/수치표고모형) 구축 사업을 사례로 국가 공간정보 사업의 효과 측정을 위한 평가 방안을 제시하고자 하였다. 연구 내용으로 우선, 3차원 공간정보 사업성 평가를 위한 분석의 틀과 편익 추정을 위한 대상 항목과 업무를 정의함으로써 평가의 기본 원칙을 정립하였다. 이때 경제성 분석의 대상은 가치창출이 높을 것으로 예상되는 데이터 공동 활용 편익 중 2차원 지도제작 업무로 한정하였으며, 이에 대한 비용 절감 편익과 절감액 추정 방안을 제시하였다. 마지막으로 분석적 계층화법(AHP: Analytic Hierarchy Process)을 이용한 종합분석을 통해 사업성 검토를 위한 최종적인 분석 결과와 시사점을 도출하였다. 결론적으로 계량화할 수 없는 무형의 편익이 많은 부분을 차지하여 편익 추정에 어려움이 있는 3차원 공간정보 사업에 대한 종합적인 경제성 평가방안을 제시할 수 있 었다. In order to carry out efficient investment and successful business in national geo-spatial industry, economic assessment on the field of 3D geo-information has recently emerged as a serious issue. Therefore, this study is intended to offer cost-effective evaluation scheme which are proper for 3D geo-spatial information, especially focusing on development of orthophoto and DEM. The study is organized as follows. The first section clarifies preliminary rules for feasibility by defining target work and category in order to estimate benefit. Then, this paper will be limited to consideration of production of digital mapping for target business which is expected to create high value and its benefit from cost reduction is suggested. Drawing from the AHP(Analytic Hierarchy Process) methods, this study comprehensively described final result and implication to examine business value. Consequently, this study can suggest economical evaluation methods on 3D geo-spatial information industry, which takes up a considerable part of immaterial benefit and has difficulties in economic assessment and estimation. preventing a variety of errors in system operation in advance.
Polystyrene-Divinyl benzene copolymer를 담체로 한 oligoglucosamine 유도체의 제조 및 흡착특성
박세훈 ( Se Hoon Park ),강학수 ( Hahk Soo Kang ),이영기 ( Young Gi Lee ),손태일 ( Tae Il Son ) 한국키틴키토산학회 2003 한국키틴키토산학회지 Vol.8 No.1
N/A Chitosan was prepared by deacetylation of natural chelate polymer, chitin, with 40% aqueous sodium hydroxide solution and oligoglucosamine was prepared by degradation of chitosan with concentrated HCI. New glucosamine series chelate resin(SG-resin) was synthesized by chloromethylation of styrene-DVB copolymer(3% DVB) with chloromerhylmethyl ether and SnCl4, followed by reacting of oligoglucosamine with chloromethylated copolymer. Absorptivities of the heavy metallic ions such as Hg^(++), Pb^(++), Cr^(++), and Cr^(++) ions to chitin, chitosan, SG-resin were investigated with variation of pH. In the case of chitin, the adsoptivity at below pH 5.8 was in order of following sequence Ph^(++)>Cd^(++)>Hg^(++)>Cr^(+6) and showed selectivity(100%) at above pH 4.9 and suddenly decreased at below this pH. To Cd^(++) ion the absorptivity tendency showed maximum at pH 4.0. Comparing the absorptivity of the chitosan with that of the chitin, it showed that ahsorptivity of chitosan was improved more than that of chitin, at above pH 2.5 in order of following sequence Hg^(++)>Ph^(++)>Cd^(++)>Cd^(+6), Absorptivity to Hg^(++) ion showed about 90% independent on pH variation. Absqtivity of the SG-resin was in the order following sequence : Pb^(++)>Hg^(++)>Cd^(++)>Cr^(+6) at above pH 2.3 and decreased comparing with that of the chitin or chitosan. To Pb^(++), Hg^(++), Cd^(++) ion the adsorption tendency was improved as the pH value war increased. In the adsorption excellent of Cd^(++), Cr^(+6) ions (100 ppm) to the chitin, chitosan, SG-resin under coexistence with 1.000 ppm of Na^(+) and Ca^(++) ions, respectively, it was observed that the absorptivity of Cd^(++), Cr^(+6) ions were not affected by these common ions.