도로시설물의 자산관리를 위한 자산가치평가방법에 관한 연구

안재민,박종범,이동열,이민재,An, Jae-Min,Park, Jong-Bum,Lee, Dong-Youl,Lee, Min-Jae 한국건설관리학회 2012 한국건설관리학회 논문집 Vol.13 No.4

도로시설물은 국가 경제 활동의 기반을 형성하는 기초적인 시설물이며 국가에 필수적인 기반 시설물이다. 현재 국내 관리대상 도로시설물은 해마다 증가하고 있으며, 이에 따른 유지관리비 예산의 상승이 예상된다. 이와 같이 건설되어 축적된 도로시설물에 대한 비용 효율적 관리를 위해서는 자산이 지닌 가치를 객관적으로 나타낼 수 있는 지표가 필요할 것이다. 이러한 지표는 자산가치로써 화폐단위로 나타낼 수 있다. 국외에서는 자산관리 및 자산가치평가에 대한 연구가 활발히 진행되고 실제 공용중인 도로시설물에 적용을 하고 있지만 국내에서는 이에 대한 준비나 연구가 부족한 상황이다. 본 논문은 도로시설물의 자산관리를 위한 합리적인 자산가치평가를 도출하기 위한 방법으로 자산가치평가방법을 기존의 문헌과 연구 자료를 통하여 조사 및 정리를 하였다. 이를 바탕으로 도로시설물에 자산가치평가방법들을 적용하기 위하여 국내 실정과 특성이 반영된 자산가치 프로세스를 개발하였다. 개발된 자산가치 프로세스에 따라 실제 공용중인 도로시설물을 적용하고 그 결과를 분석하여 각 자산가치평가방법들의 활용방안을 도출하였다. 또한, 가장 활용성이 높은WDRC(Written Down Replacement Cost)방법을 이용하여 자산관리업무 수행 절차를 위한 자산 관리 업무지원 모식도를 제시하였다. Infrastructure are the essential element in the country for they are the basic facilities forming the basis of economic activity. In Korea Infrastructure which are subject to the management of government are increasing annually, and subsequently the budget of maintenance costs is expected to rise significantly. For the effective management of the constructed and accumulated infrastructure, the integrated management of the future assets will be needed which includes the determination of the asset status, management subjects, and the location, the maintenance of their performance and state, and the prediction of the cost required to increase their useful lifetime. However, in the domestic cases the road facilities valuation has not been done systematically, and the preparation and research on this is scarce. Thus, the systematic procedure for the road facilities valuation is required. In this paper the following study was conducted to derive the reasonable asset valuation methods. First, the valuation methods was investigated and summarized throughout the domestic and international research literature. Second, to apply the investigated valuation methods to the road facilities the valuation process that reflects domestic conditions and characteristics has been developed. Third, a working Bridge, Highways, and General national ways were applied to the general valuation process, and the results were analyzed. As a final step a schematic diagram of the asset management support by WDRC valuation method was presented.

맞춤형 진로교육을 위한 웹기반 SMTS의 설계와 구현

안재민,박대우,An, Jae-Min,Park, Dea-Woo 한국정보통신학회 2010 한국정보통신학회논문지 Vol.14 No.10

고등학교에서 학생의 진로교육에 대한 기본 자료는 교육과학기술부에서 지원하는 NEIS의 교무업무시스템과 담임교사 중심의 진로교육 자료가 오프라인 형태로 관리 및 운영되고 있어, 학생들의 진로교육을 위한 실질적 의사결정 시스템으로서 활용하기에 어려움이 있다. 본 논문에서는 학생들의 맞춤형 진로교육을 위한 e포트폴리오, 성적 및 상담자료 등을 DB로 구축하여, 인터넷 웹 기반의 학생관리통합시스템(SMTS: Student Management Total System)을 설계하고 구현한다. 이 결과 교사들은 학생의 소질과 적성을 고려한 맞춤형 진로교육을 실시하여, 건전한 직업관을 가진 미래의 국가자원으로 성장시키고자 하는데 그 목적이 있다. As basic data about students' career education in high school are being managed only in forms of NEIS, which is supported by Ministry of Education, Science and Technology, and the information for career education that homeroom teachers have operated by off-line system, it is hard to use them as practical decision support system for students' career education. In this study, we intend to design and embody web-based Student Management Total System by constructing DB of students' e-portfolios, school records and counselling data etc. As a result, teachers can carry out vocational education that is considered students' talents and aptitude, and we have a goal for promoting the growth of the students as the national human resources who have sound occupational consciousness through this education.

이동통신분야의 표준화 전망

안재민,김은정,An, Jae-Min,Kim, Eun-Jeong 한국정보통신기술협회 2007 TTA저널 Vol.109 No.-

참외의 세척 및 껍질 제거에 따른 농약 잔류량 감소

안재민(Jae Min An),장순영(Soon Young Chang),임현지(Hyun Ji Lim),박재옥(Jae Ok Park),김인숙(In Sook Kim),황향란(Hyang Ran Hwang),박대한(Dae Han Park),김익로(Ik Ro Kim),강민구(Min Gu Kang) 한국농약과학회 2020 농약과학회지 Vol.24 No.1

This study was conducted to experiment on decrease residue patterns of 7 pesticides in Korean melon after washing and peeling. The test pesticides diluted by recommended dose and double recommended dose were sprayed one time and then samples were collected at the 1 days (24 hours) after spray days. The pesticides were extracted with QuEChERS method and residues were analyzed by LC-MS/MS and GC-MS/MS. Method LOQ in 7 pesticides were 0.01 mg/kg (limit detected 0.025 ng) and recoveries of test pesticides in Korean melon found to be 81.6-109.0%. The matrix matched calibration curves for 7 pesticides in Korean melon yielded good linearity (r² > 0.991). As results, removal rates after washing; dimethomorph 58.0% > propamocarb 31.8% > fluopicolide 31.0% > thiamethoxam 25.6% > chlorfenapyr 22.0% > fluopyram 19.6% > dinotefuran 16.4%, and after peeling; propamocarb 96.6% > dimethomorph 94.5% > fluopicolide 81.5% > dinotefuran 80.5% > thiamethoxam 79.8% > fluopyram 75.9%, respectively. Based on the results of this study, it may provide a basic safety information for the management of health from pesticide residues in agricultural products.

쌀의 도정도에 따른 중금속 저감화 방안 연구

안재민 ( Jae-min An ),홍경숙 ( Kyong-suk Hong ),윤혜정 ( Hye-jeong Yun ),김성연 ( Sung-youn Kim ),유경은 ( Kyung-eun Yu ),신희창 ( Hee-chang Shin ),윤재돈 ( Jae-don Yun ),이재훤 ( Jae-hwon Lee ),김동호 ( Dong-ho Kim ) 한국환경농학회 2016 한국환경농학회 학술대회집 Vol.2016 No.-

The present study was carried out to reduction of lead(Pb), cadmium(Cd), mercury(Hg), arsenic(As), chromium(Cr) and nickel(Ni) concentrations by 5 milling degrees(0.0%, 2.4%, 4.8%, 7.2% and 9.6%, from husked rice to polished rice) in rice. Recently, various rice by milling degree is sold for health and taste. To provide safe food to consumers, it is need to know the change of their concentrations according to milling degree of rice. Pb, Cd, As, Cr and Ni analysis in milled rice 255 samples were performed using microwave device and Inductively Coupled Plasma Mass Spectrometry(ICP/MS), whereas mercury was determined by automatic mercury analyzer(DMA-80). The contents of lead, cadmium, mercury, arsenic, chromium and nickel in samples were determined. The contents of lead was 0.0010-0.0572 mg/kg, cadmium was 0.0031-0.1009 mg/kg, mercury was 0.0001-0.0421 mg/kg, arsenic was 0.028-0.244 mg/kg, chromium was 0.016-0.495 mg/kg and nickel was 0.027-0.608 mg/kg, respectively. The Limit of detection(LOD), Limit of quantification(LOQ) and correlation coefficient(R2) for heavy metals(Pb, Cd, Hg, As, Cr and Ni) were 0.38-0.66 μg/kg, 1.21-2.09 μg/kg and 0.9999-1.0000, respectively. The recovery results and coefficient of variations were in the range 91.3-103.5% and 2.82-4.50%, by tested certified reference materials(CRM) and spiked standard solutions. For risk assessment, daily intakes of heavy metals were calculated and compared with provisional tolerable weekly intake(PTWI) or provisional tolerable monthly intake(PTMI) established by the Joint FAO/WHO Expert Committee on Food Additives(JECFA). Therefore, the level of overall dietary exposure to heavy metals for Korean through from these results, conforming with increase of milling degree of rice, heavy metal concentration tended to decrease. The contents of heavy metal were decreased 57.7% in lead, 13.0% in cadmium, 50.3% in mercury, 38.2% in arsenic, 59.1% in chromium and 48.5% in nickel in according to the highest milling degree of 9.6%(polished rice). The reduction rate of heavy metals were as Cr>Pb>Hg>Ni>As>Cd.

PSCAD/EMTDC를 이용한 저전압 직류 배전 시스템의 단락 고장 전류 분석

안재민(Jae-Min Ahn),전정채(Jeong-Chay Jeon),임용배(Young-Bae Lim),배석명(Seok-Myeong Bae),변길성(Gil-Sung Byeon),이경호(Kyoung-Ho Lee) 대한전기학회 2010 전기학회논문지 P Vol.59 No.4

In this paper, we analyzed the short circuit current of a low voltage direct current distribution system. For the analysis, we performed the modeling of the low voltage direct current distribution system with a 6-pulse three-phase thyristor rectifier using the PSCAD/EMTDC, surveyed impedance of sources, transformers and distribution lines to run a simulation. A result of the simulation is that short circuit currents of the direct current distribution system with the rectifier decreased due to a thyristor-ON-resistance(Ron). But in case of the low thyristor-ON resistance, output fault current of the rectifier increased over three-phase short circuit current of an AC power system without a rectifier by regular ratio of the rectifier. Because the output fault current of the rectifier can increase over interrupting the capacity of circuit breakers, studying short circuit currents of a low voltage direct current distribution system with a rectifier is necessary for introducing the direct current distribution systems.

반자동 영상 캐릭터 설계 시스템

안재민(Jae-Min Ahn),유헌우(Hun-Woo Yoo),장동식(Dong-Sik Jang) 대한산업공학회 2002 대한산업공학회 춘계학술대회논문집 Vol.2002 No.5

폐쇄형 경골 근위부 절골술 후 발생한 심한 전반슬

안재민(Jae-Min Ahn),서정탁(Jeung-Tak Suh) 대한정형외과학회 2008 대한정형외과학회지 Vol.43 No.3

폐쇄형 경골 근위부 절골술 후 경골 후방 경사각이 경향이 있음은 잘 알려져 있으나 심한 전반슬이 발생하여 교정 수술이 필요하였던 증례에 대한 보고는 없었다. 내측 구획 퇴행성 슬관절염 및 내반슬을 가진 54세 환자로 타병원에서 폐쇄형 경골 근위부 절골술 후 잘못된 수술의 결과로 심한 전반슬이 발생하였으며 지속적으로 슬관절통과 심한 변형을 호소하였다. 이에 대하여 두 개의 쐐기형 이중피질 자가골 이식을 이용한 개방형 교정 절골술 및 이중 금속판 고정을 시행하여 만족할 만한 결과를 얻었다. 폐쇄형 경골 근위부 절골술시 내반의 교정뿐만 아니라 경골 후방 경사각의 변화에도 세심한 주의를 기울여야 할 것으로 사료된다. Although a closing wedge high tibial osteotomy can decrease the posterior tibial slope, there are no reports of severe genu recurvatum after a closing wedge osteotomy that required corrective surgery. A 54-year-old male with medial compartment osteoarthritis and genu varum was treated with a closing wedge high tibial osteotomy in another hospital, which led to severe recurvatum because of surgical failure. He complained of knee pain and a severe deformity, but of which were corrected by an open wedge corrective osteotomy, a two-wedge bicortical autograft reconstruction, and double plate fixation. Surgeons should pay close attention to both varus deformity correction and changes in the posterior tibial slope during a closing wedge high tibial osteotomy.

여가 운동선수에서 발생한 전경골근 탈출의 Polypropylene Mesh를 이용한 수술적 치료

안재민 ( Jae Min Ahn ),서정탁 ( Jeung Tak Suh ),김태완 ( Tae Wan Kim ) 대한스포츠의학회 2009 대한스포츠의학회지 Vol.27 No.1

We report a case of tibialis anterior muscle hernia with large fascial defect of the leg in a recreational athlete, resulting from intense physical activity (soccer). The large fascial defect was closed with polypropylene mesh. Twelve months postoperatively, there was no recurrence of the hernia and any discomfort. We recommend the use of artificial mesh patches for the repair of larger defect which is unsuitable for direct closure.

시뮬레이션을 이용한 하이브리드 초전도 전류제한기의 반주기 후 한류 방식 분석

안재민(Jae-Min Ahn ),김진석(Jin-Seok Kim ),문종필(Jong-Fil Moon ),임성훈(Sung-Hun Lim ),김재철(Jae-Chul Kim ),현옥배(Ok-Bae Hyun ),설규환(Kyu-Hwan Seol ) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.7