오염총량관리를 위한 남강댐유역 BOD 자료의 공간특성 분석

김상민,김성민,박태양,Kim, Sang-Min,Kim, Sung-Min,Park, Tae-Yang 한국농공학회 2010 한국농공학회논문집 Vol.52 No.3

The purpose of this study is to analyze the spatial characteristics of Namgang-Dam watershed for a Total Maximum Daily Loads (TMDL). Three TMDL target sites, Gyeonghogang1, 2, Namgang-Dam2, are located within Namgang-Dam watershed. Under the current criterion for TMDLs, 3-year arithmetic mean BOD concentration of the target sites should not exceed the target concentration for 2 consecutive years. Two and three times of violation were observed for Gyenghogang2 and Namgang-Dam2 sites while no violation was found for Gyeonghogang1 site. However, no violation was found since 1999 for all three sites. Correlation between each 12 stations within the watershed were analyzed and cluster analysis was conducted to figure out the spatial characteristics of the watershed. Correlation coefficient between Gyonghogang1 and 2 was high (0.758) while the coefficients between lake station (Namgang-Dam2) and stream stations (Gyonghogang1 and 2) were very low. Dendrogram indicated that all of three Namgang-Dam stations were very close and Gyenghogang1, 2 stations were also close.

Reconstruction of a Large Cricotracheal Defect Using a Sternocleidomastoid Myoperiosteal Flap : A Case of Locally Aggressive Papillary Thyroid Carcinoma with Tracheal Invasion

김상민,김미라,김용완,백무진,박준욱,Kim, Sang Min,Kim, Mi Ra,Kim, Yong-Wan,Baek, Moo Jin,Park, Jun-Ook 대한두경부종양학회 2015 대한두경부 종양학회지 Vol.31 No.1

기관을 침범한 갑상선 악성종양을 제거한 후에 성문하부에 비교적 큰 기관 결손이 발생할 수 있다. 단단문합술은 넓은 부위의 결손부를 재건하는 방법으로 널리 받아들여지고 있지만, 문합부 파열, 반회후두신경마비, 재협착 등의 합병증이 발생할 수 있다. 본 증례는 기도를 침범한 갑상선 유두암종을 제거한 후 윤상연골과 기관연골의 비교적 큰 결손부를 흉쇄유돌근 근골막피판을 사용하여 안전하게 재건한 사례이다. 55세 남자 환자가 기도를 침범한 갑상선 유두상암으로 내원하였으며 기도침범은 윤상연골(둘레의 약 30%)과 4개의 기관연골(둘레의 약 50%)을 해당하는 넓은 부위였다. 수술 전 기관절개술을 시행하여 주위 기관연골의 상태가 좋지 않아 단단문합술 시행 후 문합부 파열 가능성이 있다고 판단하여 흉쇄유돌근 근골막피판을 이용하여 재건하기로 계획하였다. 갑상선 절제술, 경부림프절 절제술, 흉쇄유돌근 근골막피판을 이용한 재건술을 시행하였으며 수술 후 12일째 별다른 문제없이 퇴원하였다. 환자는 수술 후 현재 22개월 간 기도 협착 등의 별다른 합병증 없이 지내고 있다. 흉쇄유돌근 근골막피판은 성문하부나 기관지 전외측벽의 비교적 큰 결손부를 재건하는 데 유용하게 사용될 수 있다.

국립공원내 홍수피해 저감을 위한 미계측 산림지역의 설계홍수량 추정

김상민,임상준,이상호,김형호,마호섭,정원옥,Kim, Sang-Min,Im, Sang-Jun,Lee, Sang-Ho,Kim, Hyung-Ho,Ma, Ho-Seop,Jeong, Won-Ok 한국농공학회 2009 한국농공학회논문집 Vol.51 No.5

The purpose of this study is to estimate the design flood runoff for ungaged forest watershed to reduce the flood damage in national park. Daewonsa watershed in Jirisan National Park was selected as study watershed, of which characteristic factors were obtained from GIS data. Flood runoff was simulated using SCS unit hydrograph module in HEC-HMS model. SCS Curve Number (CN) was calculated from forest type area weighted average method. Huff's time distribution of second-quartile storm of the Sancheong weather station, which is nearest from study watershed, was used for design flood runoff estimation. Critical storm duration for the study watershed was 3 hrs. Based on the critical duration, the peak runoff for each sub-watershed were simulated. It is recommended to monitor the long-term flow data for major stream stations in National Park for a better reliable peak runoff simulation results.

오죽잎차와 오죽죽순차의 성분 분석 및 항산화 효과

김상민 ( Sang Min Kim ),전제승 ( Je Seung Jeon ),강석우 ( Suk Woo Kang ),김우리 ( Woo Ri Kim ),이기덕 ( Ki Deok Lee ),엄병헌 ( Byung Hun Um ) 한국응용생명화학회(구 한국농화학회) 2012 Journal of Applied Biological Chemistry (J. Appl. Vol.55 No.2

Nutritional components of Ojuk leaf tea and Ojuk shoot tea prepared from the leaves and shoots of black bamboo (Phyllostachys nigra Munro) by tea manufacturing process were evaluated. In addition, the extraction yield of water soluble components from these teas in the general tea brewing condition (water extraction in 80oC for 10 min.) and the contents of polyphenol and flavonoid were compared with not only the dried raw materials, but also green tea and mate tea. Finally, offline and online scavenging activities against 2,2`-azino-bis(3-ethylbenzothiazoline- 6-sulphonic acid) (ABTS) and di(phenyl)-(2,4,6 trinitrophenyl)iminoazanium free radicals were investigated to evaluate the antioxidant activity and explore the components showing ABTS free radical scavenging activity from tea infusion. These results demonstrated that these teas from black bamboo contain various nutritional components and can be used as traditional tea beneficial to human health.

농업용 저수지에서의 환경용수 방류 능력 평가

김상민,김성재,김용완,박태양,김성민,박기욱,장민원,Kim, Sang-Min,Kim, Sung-Jae,Kim, Yong-Wan,Park, Tae-Yang,Kim, Sung-Min,Park, Ki-Wook,Jang, Min-Won 한국농공학회 2011 한국농공학회논문집 Vol.53 No.6

The purpose of this study was to establish the methodology for providing the environmental flows from irrigation reservoir. Reservoir water budget for study area was analyzed to simulate the water supply scenarios for environmental flows. Bonghyun and Hi reservoirs area, located in Gyeongnam, Gosung-gun, Hi-myeon, were selected for study watersheds and streams for this study. Reservoir operation was simulated to determine the envionmental flows supply amount from March to October with the constraint that environmental flow supply was restrained when the storage of reservoir were below the half or one-third of effective storage. The simulated results indicated that the supply of environmental flows with the amount of 200 ton/day and 600 ton/day resulted in up to 15 mm and 29 mm of runoff depth increase in the downstream, respectively. The effect of environmental flows supply from existing irrigation reservoir was not significant because the irrigation reservoir was not designed to supply the environmental flows. It is necessary to remodel the irrigation reservoir and develop the reservoir operation technique, to meet the need for the environmental flows.

Rapid and Visual Detection of Barley Yellow Dwarf Virus by Reverse Transcription Recombinase Polymerase Amplification with Lateral Flow Strips

김나경(Na-Kyeong Kim),이효정(Hyo-Jeong Lee),김상민(Sang-Min Kim),정래동(Rae-Dong Jeong) 한국식물병리학회 2022 Plant Pathology Journal Vol.38 No.2

Barley yellow dwarf virus (BYDV) has been a major viral pathogen causing significant losses of cereal crops including oats worldwide. It spreads naturally through aphids, and a rapid, specific, and reliable diagnostic method is imperative for disease monitoring and management. Here, we established a rapid and reliable method for isothermal reverse transcription recombinase polymerase amplification (RT-RPA) combined with a lateral flow strips (LFS) assay for the detection of BYDV-infected oat samples based on the conserved sequences of the BYDV coat protein gene. Specific primers and a probe for RT-RPA reacted and optimally incubated at 42oC for 10 min, and the end-labeled amplification products were visualized on LFS within 10 min. The RT-RPA-LFS assay showed no cross-reactivity with other major cereal viruses, including barley mild mosaic virus, barley yellow mosaic virus, and rice black streaked dwarf virus, indicating high specificity of the assay. The sensitivity of the RT-RPA-LFS assay was similar to that of reverse transcription polymerase chain reaction, and it was successfully validated to detect BYDV in oat samples from six different regions and in individual aphids. These results confirm the outstanding potential of the RT-RPA-LFS assay for rapid detection of BYDV.

연구 논문 : 슬러지 냉동처리에 의한 갈조로부터 바이오가스 생산

김지윤 ( Ji Youn Kim ),정행순 ( Haeng Soon Jeong ),우대식 ( Dae Sik Woo ),김상민 ( Sang Min Kim ),김인수 ( In Soo Kim ),이재화 ( Jae Hwa Lee ) 한국공업화학회 2012 공업화학 Vol.23 No.6

본 연구에서는 해조류 다시마를 바이오매스로 이용하는 혐기성 소화로부터 바이오가스를 생산하였다. 최적의 혐기성 배양조건을 확립하기 위해 슬러지는 -70 ℃에서 20 min 동안 냉동 전처리를 하였다. 대조군과 비교했을 때 수소와 메탄가스는 각각 2.7배와 3.4배 증가한 667.28 mL/L와 3420.24 mL/L를 생산하였다. 냉동 전처리한 슬러지의 초기 pH 최적 조건은 7.0이었고, 다시마 바이오매스의 초기 pH 최적 조건은 8.0이었으며 알칼리 조건에서 보다 산성 조건에서 바이오가스 생산량이 크게 감소하는 것을 확인할 수 있었다. 슬러지의 냉동 전처리와 바이오매스 및 슬러지의 최적 pH 조건에서 최대 643.73 mL/L의 수소와 4291.6 mL/L의 메탄가스를 생산하였다. 이는 대조군과 비교했을 때 각각 2.6배와 4.3배 증가한 생산량이었다. 또한 최적 조건의 5-L 회분식 혐기성 배양에서 바이오가스의 생산량을 측정한 결과 기질에 포함된 다시마에 의해 생산될 수 있는 최대 생산량은 수소 1605.03 mL/L와 메탄가스 4593.71 mL/L로 확인되었다. In the present study, biogas was produced from the anaerobic digestion of marine macroalgae (Laminaria japonica) biomass. The optimal anaerobic condition for producing the sludge was the freeze treatment at -70 ℃ for 20 min. Total amounts of hydrogen and methane gas produced were 667.28 mL/L and 3420.24 mL/L, respectively, which were 2.7 and 3.4 times greater than that in the control group. Freeze treatment of sludge produced the maximum biogas under an initial optimum pH of 7.0 and the maximum biomass at an initial optimum pH of 8.0. We confirmed that biogas production was greatly reduced under acidic conditions compared to that under alkaline conditions. Sludge was freeze treated, and the biomass and sludge production was optimal the total amounts of hydrogen and methane gas produced were 643.73 mL/L and 4291.6 mL/L, respectively, which were 2.6 and 4.3 times greater than in the control group. Also the results showed that under optimal conditions in a 5-L bioreactor, a maximum of 1605.03 mL/L of hydrogen and 4593.71 mL/L of methane gas could be produced by the substrate contained in the marine macroalgae biomass.

HSPEXP 모형평가지표 이용한 HSPF 모형의 수문매개변수 보정

김상민,성충현,박승우,Kim, Sang-Min,Seong, Choung-Hyun,Park, Seung-Woo 한국농공학회 2009 한국농공학회논문집 Vol.51 No.4

The purpose of this study was to test the applicability of the HSPEXP model performance criteria for calibrating hydrologic parameters of HSPF. Baran watershed, located at Whasung city, was selected as a study watershed in this study. Input data for the HSPF model were obtained from the digital elevation map, landuse map, soil map and others. Water flow data from 1996 to 2000 was used for calibration and from 2002 to 2007 was for validation. Using the HSPEXP decision-support software, hydrology parameters were adjusted based on total volume, then low flows, storm flows, and finally seasonal flows. Suggested criteria for each model performance variables were referenced from the previous research. For the calibration period, all the HSPEXP model performance criteria were satisfied while two criteria were slightly violated for the validation period.

위치기반서비스 이용에 대한 인지된 위험의 영향 연구

김상민,이지은,박찬권,Kim, Sang Min,Lee, Ji-Eun,Park, Chankwon 한국디지털정책학회 2014 디지털융복합연구 Vol.12 No.12

개인정보 관련 사건사고가 증가하면서 개인정보 기반의 모바일 서비스에 대한 우려가 늘고 있다. 본 연구는 스마트폰 보급 확대로 이용이 증가하고 있는 위치기반서비스 앱 이용에 영향을 미치는 요인을 도출하고 이에 대한 인지된 위험의 영향력을 확인하고자 하였다. 이를 위해 위치기반서비스 앱 이용 행위에 영향을 미치는 변수를 도출한 후 인지된 위험이 이들 변수와 앱 이용 행위 사이에 어떤 영향을 미치는가를 실증 분석하였다. 분석 결과, 유용성과 사회적 영향은 위치기반서비스 앱 이용에 영향을 미치나, 인지된 위험을 높게 인식하는 집단은 유용성으로부터, 인지된 위험을 낮게 인식하는 집단은 사회적 영향으로부터 이용 행위에 더 크게 영향을 받는 것으로 나타났다. 위치기반서비스 산업의 성장을 위해서는 인지된 위험의 교섭력을 최소화하기 위한 정보보호 정책과 보호기술이 요구되며 기업 입장에서는 인지된 위험 수준에 따른 개발 전략을 취해야 할 것이다. As the disclosure of privacy information has grown steadily, concerns about mobile services based on the personal information also increased. We aspired to reveal factors influencing the use of Location-Based services(LBS) App and analyse how the perceived risk affected between these factors and the use of LBS App. Results showed that usefulness and social influence influenced on the use of LBS App. We also found that the group who highly recognized the perceived risk was highly affected by usefulness and the group who lowly recognized the perceived risk was highly affected by social influence. Findings show that the company's strategy should be different depending on the level of consumers' perceived risk.

국가종합전자조달시스템 종합쇼핑몰 개선방향에 대한 사용자분석 : 경북지역 중심으로

김상민,이현수,Kim, Sang-Min,Lee, Hyun-Soo 한국디지털정책학회 2018 디지털융복합연구 Vol.16 No.5

본 논문은 나라장터 종합쇼핑몰 개선방향에 대해 구매자 피드백(Feedback), 다양한 제품 옵션(Option) 선택 기능, 결제절차의 간소화 및 만족에 관한 선행연구의 제안을 바탕으로, 실제 나라장터 종합쇼핑몰에서 전산장비 등을 구매 및 사용하는 공공 및 산하기관 근무자들의 입장에서 개선 필요성과 만족에 대해 확인하기 위함이다. 이를 위해 기초설문과 심층 인터뷰를 바탕으로 경북지역 공공기관 및 정부산하기관에서 전산장비 등에 대해 구매경험이 있으며 실제 사용하는 전산직 및 비전산직 근무자를 대상으로 질적 사례연구를 통해 확인 하였다. 연구결과 구매자 피드백(Feedback)과 옵션(Option) 선택 부분에 대해서는 개선이 필요하다는 결론과 결제절차의 간소화와 만족에 대해서는 근무경력에 따른 차이가 있다는 것을 확인하였다. 또한 공공 및 산하기관 연구 참여자들의 사용에 대한 내면의 의견을 확인 할 수 있었던 것이 가장 큰 기여도라 하겠다. 향 후 보완사항으로, 수도권 및 타지역 공공 및 산하기관의 근무자들과 일반 조달 제품에 대한 구매경험을 가진 공공 및 산하기관 다수의 근무자들을 대상으로 한 추가연구가 필요할 것으로 보인다. This paper is based on the suggestions of the prior research on the buyer feedback, the selection of various product options, and the payment procedure improvements for Korea ON-line E-Procurement System(KONEPS), and this is to confirm the necessity of improvement and satisfaction from the viewpoint of the workers of the public and subordinate organizations the purchasing and using of the computer equipment in the actual KONEPS(Korea ON-line E-Procurement System). Based on the basic questionnaires and in-depth interviews, this paper conducts the qualitative case studies on IT and non - IT workers who had purchasing experiences for equipment at public institutions and government agencies in Gyeongbuk province. As results of the study, it was confirmed that the improvement is necessary for the buyer feedback and option selection part, and that there is a difference among the work experience for the simplification of the payment procedure and the satisfaction. In addition, the biggest contribution in the provided research is to categorize and to analyze the opinions on the use of public and relevant subordinate research participants. Additional work will be needed for a large number of workers in public and subordinate organizations who have purchasing experiences for handling various procurement products and those working in the metropolitan area and other public and subordinate agencies.