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.

이동통신분야의 표준화 전망

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

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.

e-Business Demand Education 분석에 따른 전문계고 Curriculum 연구

안재민(Jae-Min An),박대우(Dea-Woo Park) 한국컴퓨터정보학회 2009 韓國컴퓨터情報學會論文誌 Vol.14 No.8

산업별 필요인력의 수급 불균형과, 직업교육기관의 Skill Mismatch로 산업체가 요구하는 전문기술 인력 수급이 어려운 실정이다. 산업체는 학교졸업자를 현장에서 재교육하고, 산업특성에 맞는 기술을 습득하여야만 생산성을 향상 시킬 수 있다. 본 논문에서는 산업체가 요구하는 Demand Education을 수용하고, e-Business 분야에서 특성화 전문계고 Curriculum을 작성하는 연구이다. e-Business 산업분류 및 직종분류를 파악하고, e-Business 교육에 대해 산업체에서 요구하는 지식과 Skill 수준을 파악하고 그 수요를 조사하고 분석한다. 기반산업, 지원산업, 활용산업별로 조사된 e-Business Curriculum을 학습에 적용하고, 산업체의 Demand Education 계고 e-Business Curriculum의 기본 모델과 학과별 Curriculum을 제시하고, 산업체 요구의 e-Business 교육을 통한 생산성 향상을 통한 국가 발전에 기여하고자 한다. It is difficult that expertise human supply and demand for industry requires by imbalance of industry necessity human and profession organs of education's Skill Mismatch. Industry can prove productivity though reeducate school graduation person in spot and master correct technology in industry special quality. This paper is research that accommodate Demand Education that industry requires and make out full text caution Curriculum Specializing Vocational High School in e-Business field. Analysis e-Business industrial classification and occupational classification. Analysis knowledge and technological level that require in industry about e-Business education and investigate and analyze the demand. Base industry, Support industry, Apply e-Business Curriculum that is examined by practical use industry to learning, Do to estimate satisfaction about Demand Education Curriculum of industry and confirm Success special quality with research and investigation and application wave. Suggested for e-Business Curriculum's basis model in this paper and school subject Curriculum. Wish to contribute in nation development through productivity elevation through e-Business education of industry request.

HPLC-ICP-MS를 활용한 잡곡의 비소 화학종 및 위해 분석

안재민 ( Jae-min An ),홍경숙 ( Kyong-suk Hong ),김성연 ( Sung-youn Kim ),김대중 ( Dae-jung Kim ),이호진 ( Ho-jin Lee ),신희창 ( Hee-chang Shin ) 한국환경농학회 2017 한국환경농학회지 Vol.36 No.2

본 연구는 최근 식생활 개선과 더불어 건강식의 원료로 수요가 크게 증가하고 있는 국내 유통 잡곡류에 대한 비소의 농도 수준을 확인하고, 비소를 구성하고 있는 화학종들을 분리 및 정량하여 섭취량에 따른 위해 수준을 확인하고자 하였다. 잡곡 12품목 188점을 현지 수거 후 분석에 활용하였는데, 총비소 분석은 일정량의 시료에 질산과 microwave를 이용하여 전처리한 후 ICP-MS를 이용하여 분석을 하였다. 비소화학종 분리 및 정량을 위하여 HPLC로 화학종을 선택적으로 분리하고 검출기 역할을 하는 ICP-MS를 결합한 형태인 HPLC-ICP-MS를 이용하여 비소 화학종을 분리 분석하였다. 추출 용매로는 증류수, 말론산, 질산을 이용하여 추출 효율을 비교한 결과 1% 질산이 비소 화학종 모두에서 양호한 추출효율을 보여 최종적으로 1% 질산을 추출용매로 선택하였고, 비소 화학종이 적절한 pH에서 전하를 띄는 특성을 고려하여 이동상으로는 ammonium carbonate, ammonium phosphate를 gradient 조건으로 분석하였다. 분석법 검증을 위하여 검출한계, 정량한계, 직선성 및 회수율 모두 AOAC에서 권장하는 기준을 만족하여 총비소 및 비소 화학종 분리 분석 결과에 대한 신뢰성을 확인하였다. 품목별 총비소 평균 농도는 찹쌀 0.267±0.090 mg/kg, 검정현미0.241±0.137 mg/kg, 혼합곡 0.183±0.045 mg/kg의 순으로 나타났고, 무기비소 평균 농도는 찹쌀 0.149±0.056 mg/kg, 검정현미 0.136±0.075 mg/kg, 혼합곡 0.110±0.035 mg/kg의 순으로 총비소 결과값과 동일한 순서를 보였다. 총비소와 무기비소 농도의 상관 분석결과 총비소 농도가 높으면 무기비소 농도 또한 높은 농도를 보여 강한 양의 상관관계가 있음을 확인하였다. 위해 평가는 국민건강영양조사 자료(2012)를 근거로 잡곡에 대한 무기비소 위해 정도를 평가하였는데 품목별 무기비소 노출량은 혼합곡에서 19.91 μg/day로 가장 높은 노출량을 보였고, 찹쌀 1.07 μg/day, 검정현미 0.77μg/day, 보리 0.13 μg/day, 콩 0.11 μg/day 순으로 나타났다. 품목별로는 혼합곡이 PTWI 대비 16.89%로 가장 높은 수준을 보였고, 찹쌀 0.91%, 검정현미 0.65%, 보리 0.11%, 콩 0.09%의 순으로 나타났다. 노출량에 따른 위해 수준은 잡곡 12품목 모두 일시에 섭취한다고 가정할 경우 PTWI 대비18.69% 수준으로, 잡곡류에 대한 무기비소의 인체 노출 및 위해 수준은 안전한 것으로 평가되었다. BACKGROUND:Miscellaneous cereal have been largely consumed in Korea as due to their physiological functions beneficial to human health. The cereals are currently a social concern because they have been found to contain heavymetals. Thus,monitoring heavymetals in the cereals is an important requirement for food safety analysis. In this study, we determined arsenic concentration in the cereals randomly harvested from different markets. METHODS AND RESULTS: Inorganic arsenic was determined by ICP-MS coupled with HPLC system. The HPLC-ICP-MS analysis was optimized based on the limit of detection and recover test to reach 0.13-1.24 μg/kg and 94.3-102.1%, respectively. The concentrations of inorganic arsenic equivalent to daily exposure were levels of 19.91 μg/day inmixed grain, 1.07 μg/day in glutinous rice, 0.77 μg/day in black brown rice, 0.13 μg/day in barley and 0.11 μg/day in soybeans. CONCLUSION: The levels of arsenic in miscellaneous cerealswere found lower than the recommended The Joint FAO/WHOExpert Committee on FoodAdditives (JECFA) levels, suggesting that the cerealsmarketed inKorea are not potential concern in risk assessment.

국내 다소비 농산물의 알루미늄 농도 모니터링 및 농산물 섭취로 인한 위해도 평가

안재민 ( Jae Min An ),홍경숙 ( Kyong Suk Hong ),김성연 ( Sung Youn Kim ),김지혜 ( Ji Hye Kim ),유경은 ( Kyong Eun Yu ),김효영 ( Hyo Young Kim ),박형달 ( Hyoung Dal Park ),이재훤 ( Jae Hwon Lee ),김동호 ( Dong Ho Kim ) 한국환경농학회 2015 한국환경농학회지 Vol.34 No.4

BACKGROUND: This study was carried out to collect occurrence data on aluminum in 12 type agricultural products and assess dietary exposure risk to the Korean population health for aluminum concentration in agricultural products.METHODS AND RESULTS: Aluminum analysis samples were performed using microwave device and Inductively Coupled Plasma Optical Emission Spectrometer. The LOD(Limit of Detection) for aluminum was 0.851 ug/kg,while the LOQ(Limit of Quantitation) was 2.838 ug/kg and recovery was 97.6% for aluminum. The average levels of aluminum in mg/kg were 0.526 for rice, 0.546 for Korean cabbage, 1.316 for corn, 6.207 for soybean, 0.549 for sweet potato, 0.257 for potato, 6.963 for spinach, 1.213 for carrot,0.524 for garlic, 0.950 for radish, 1.015 for leek, and 3.511 for Welsh onion. The dietary exposures of aluminum through usual intake were polished rice 89.31 ug/day,Korean cabbage 33.14 ug/day, corn 0.66 ug/day, soybean 3.72 ug/day, sweet potato 6.86 ug/day, potato 4.96 ug/day,spinach 45.96 ug/day, carrot 6.79 ug/day, garlic 2.36 ug/day, radish 7.32 ug/day, leek 2.23 ug/day and Welsh onion 43.89 ug/day, taking 0.57%, 0.21%, 0.00%, 0.02%,0.04%, 0.03%, 0.04%, 0.04%, 0.02%, 0.05%, 0.01% and 0.28% of PTWI(2 mg/kg b.w./week), respectively.CONCLUSION: The levels of overall dietary exposure to aluminum for Korean population through intake of agricultural product was far below the recommended JECFA level, indicating of least possibility of risk.

소면적 재배작물 어수리(Heracleum moellendorffii L.)의 Etofenprox, Pyrifluquinazon, Spirotetramat 및 Sulfoxaflor에 대한 잔류특성 연구

안재민(Jae Min An),신수정(Su Jung Shin),김민기(Min Gi Kim),황향란(Hyang Ran Hwang),장순영(Soon Young Chang),김인숙(In Sook Kim),권미정(Mi Jung Kwon),박대한(Dae Han Park),이광희(Gwang Hee Lee) 한국농약과학회 2019 농약과학회지 Vol.23 No.2

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.

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

폐광산 인근 지역에서 생산된 농산물의 중금속 안전성 평가

안재민 ( Jae-min An ),이혜민 ( Hye-min Lee ),김익로 ( Ik-ro Kim ),박대한 ( Dae-han Park ),이광희 ( Gwang-hee Lee ) 한국환경농학회 2019 한국환경농학회 학술대회집 Vol.2019 No.-

This study was carried out to risk assessment of lead(Pb), cadmium(Cd), and inorganic arsenic(I-As) contamination in agricultural products at abandoned mine area in 25 crops including rice and vegetables. The 36 typical investigation sites located in Gyeongbuk provincial area were selected by considering the heavy metal levels, that had been known that the amount of the heavy metals exceeded the contamination level based on the previous survey. The collected 25 agricultural products were rice, radish, potato, sweet potato, bracken, pepper, soybean, jujube, welsh onion, ballon flower, perilla leaves, peanut, garlic, japanese apricot, korean cabbage, peach, chinese chives, apple, wild berry, cabbage, onion, maize, sesame, chwinamul, and squash. The various samples were collected and performed using microwave device and ICP/MS in lead and cadmium(n=1,059). Inorganic arsenic was treatment of 1% nitric acid and using HPLC-ICP/MS(n=365). The Limit of detection(LOD), Limit of quantification(LOQ), and correlation coefficient(R²) for heavy metals were 0.38-0.87 μg/kg, 1.14-2.61 μg/kg, and 0.9998-1.0000, respectively. The recovery results and coefficient of variations were in the range 90.9-102.4%, and 3.7-5.8%, by tested certified reference materials(CRMs). The contents of lead were N.D.-0.227 mg/kg(sesame 0.040±0.085 mg/kg, ballon flower 0.039±0.056 mg/kg, sweet potato 0.034±0.058 mg/kg), cadmium were N.D.-0.958 mg/kg(ballon flower 0.244±0.164 mg/kg, welsh onion 0.145±0.133 mg/kg, sesame 0.124±0.136 mg/kg), and inorganic arsenic was 0.120±0.054 mg/kg(only rice minimum N.D., and maximum 0.246 mg/kg) in agricultural products. 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). The dietary exposures of lead for general population were 7.0×10^-5-1.7×10⁰ μg/day, taking 1.8×10^-4-4.6×10⁰% of PTWI. The dietary exposure of cadmium for general population were 5.2×10^-4-7.2×10⁰ μg/day, corresponding to 1.0×10-3-1.4×10¹% of PTMI. The dietary exposure of inorganic arsenic for general population were 1.7×10¹ μg/day, corresponding to 2.2×10¹% of PTWI. Conclusively, it requires to consider the critical levels of heavy metals agricultural products due to unexpectedly high levels in few places while amount of heavy metals in the samples were relatively low in most areas.