농림생태계 지속가능성 제고를 위한 농림기상학의 도전과 과제

김광수,문경환,천정화,김준환,강민석,김대준,Kim, Kwang Soo,Moon, Kyung Hwan,Chun, Junghwa,Kim, Junhwan,Kang, Minseok,Kim, Dae-Jun 한국농림기상학회 2019 한국농림기상학회지 Vol.21 No.3

Clay/EAF dust계 시편의 소결과정 중 액상거동 제어

김광수,강승구,Kim, Kwang-Soo,Kang, Seung-Gu 한국결정성장학회 2005 한국결정성장학회지 Vol.15 No.2

지정 폐기물인 electrical arc furnace(EAF) 더스트에는 액상을 형성하는 fluk 성분이 많이 포함되어있어, 점토와 혼합하면 시편의 소결온도를 낮춰주고 기계적 강도를 향상시키는 장점이 있다. 그러나 더스트-점토 계 벽돌 제조시 더스트 첨가량을 증가시키면 소결과정에서 과도한 액상이 생성되어 제품 불량률이 높아진다. 점토-더스트 계 시편의 소결공정 중에 발생하는 액상을 제어하기 위하여 $Al_2O_3$를 첨가하고 물리적 특성 변화를 분석하였다. $Al_2O_3$가 첨가된 더스트-점토계 소결체는 기공크기가 감소되면서 미세구조가 균일해졌다. 이에 따라 기계적 강도가 증가되었고 동시에 최대강도가 나타나는 온도가 높아졌다. 또한 겉보기 밀도가 증가되었고 흡수율은 감소하였다. 첨가된 $Al_2O_3$는 mullite($3Al_2O_3{\cdot}2SiO_2$)를 생성함으로서, 액상형성에 참여할 $SiO_2$을 소모시키고 동시에 액상의 점도를 높여, 소결체의 내화도를 증진시키고 따라서 소결과정에서 시편 불량률을 낮출 것으로 분석되었다. The electrical arc furnace (EAF) classified as a special waste contains many flux components producing melts during a sintering process, so it decreases the sintering temperature and improves the mechanical properties of specimens. Increasing dust content in a clay-dust system brick, however, may cause the fraction defective higher due to the excessive liquid produced. To control the liquid behavior produced during sintering process for the clay-dust system specimens, the $Al_2O_3$ was added and the physical properties were analyzed. The microstructure for the clay-dust system body sintered with $Al_2O_3$ became homogeneous and the overall size of pores decreased. Adding $Al_2O_3$ to clay-dust system body increased the mechanical properties and the temperature of maximum strength increased as much as $50^{\circ}C$, and the apparent density increased and the absorption decreased. The mullite ($3Al_2O_3{\cdot}2SiO_2$) was produced during sintering process by reaction of $Al_2O_3$ and $SiO_2$ which could participate to liquid-producing-process and the viscosity of melts increased which was proved by measuring a critical viscosity temperature (Tcv) therefore, the refractoriness of specimens were improved to lower the fraction defective.

Noah Multi Physics 모델과 CERES-Rice 모델의 작물 생육 및 증발산 모의 비교

김광수 ( Kwang Soo Kim ),강민석 ( Min Seok Kang ),정하늘 ( Ha Neul Jeong ),김준 ( Joon Kim ) 한국농림기상학회 2013 한국농림기상학회지 Vol.15 No.4

대기와 지표면을 구성하고 있는 토양 및 식생은 생물리학적/생지화학적인 과정을 통해 서로 상호작용을 한다. 이러한 과정을 모의하기 위해 지표모델과 작물 생육모델이 사용되고 있다. 지표모델인 Noah MP 모델과 작물생육모델인 CERES-Rice 모델을 비교하기 위해 해남 플럭스 관측소 인근 지역에서 작물의 생육과 증발산량을 모의하였다. 플럭스 관측자료가 수집된 2003년부터 2012년까지 해남 플럭스 관측소의 주요 식생인 벼를 대상으로 생육과 증발산량을 모의되었다. Noah MP 모델은 단순한 식생 모의 과정으로 인해 개화기를 전후로 하는 벼의 LAI 변화양상을 정확하게 반영하지 못하였다. 벼의 생체중 예측에 있어서도 실제 관측될 수 있는 생체중보다 대략 10분의 1 수준에 해당하는 생체중이 모의되었다. 증발산량 모의의 경우에도, CERES-Rice 모델의 모의값보다 약 21%에 해당하는 증발산량을 모의하였다. 반면, CERES-Rice모델의 경우 LAI의 변화와 생체중 모의 값은 실제의벼 생육 양상과 유사할 것으로 추정되었다. 또한, 증발산량의 경우에도 해남 플럭스 관측소에서 측정된 값과 비교하였을 때 Noah-MP모델의 모의값이 CERESRice모델의 모의값에 비해 RMSE 값이 1.8배 높았다. Noah MP 모델이 보이는 높은 오차값들은 NoahMP모델이 논의 지표상태를 적절히 반영하지 못하였기때문으로 사료되었고, 특히 과소추정된 생체중을 보정하여 증발산량을 예측할 경우 오차를 30%까지 줄일수 있을 것으로 보인다. 따라서, Noah MP 모델에논에서의 지표 특성을 반영할 수 있다면 보다 정확한 물질순환과 에너지 교환을 예측할 수 있을 것으로 사료된다. Biophysical and biochemical processes through which crops interact with the atmosphere have been simulated using land surface models and crop growth models. The Noah Multi Physics (MP) model and the CERES-Rice model, which are a land surface model, and a crop growth model, respectively, were used to simulate and compare rice growth and evapotranspiration (ET) in the areas near Haenam flux tower in Korea. Simulations using these models were performed from 2003 to 2012 during which flux measurements were obtained at the Haenam site. The Noah MP model failed to simulate the pattern of temporal change in leaf area index (LAI) after heading. The simulated aboveground biomass with the Noah MP model was underestimated by about 10% of the actual biomass. The ET simulated with the Noah MP model was as low as 21% of those with the CERESRice model. In comparison with actual ET measured at Haenam flux site, the root mean square error (RMSE) of the Noah MP model was 1.8 times larger than that of the CERES-Rice model. The Noah MP model seems to show less reliable simulation of crop growth and ET due to simplified phenology processes and assimilates partitioning compared with the CERES-Rice model. When ET was adjusted by the ratio between leaf biomass simulated using CERES-Rice model and Noah MP model, however, the RMSE of ET was reduced by 30%. This suggests that an improvement of the Noah MP model in representing rice growth in paddy fields would allow more reliable simulation of matter and energy fluxes.

힘센엔진의 과거, 현재 & 미래

김광수(Kwang-Soo Kim),김종찬(Jong-Chan Kim),강창민(Chang-Min Kang) 한국마린엔지니어링학회 2006 한국마린엔지니어링학회 학술대회 논문집 Vol.2006 No.-

현대중공업이 자체개발한 HiMSEN engine의 탄생 배경과 Hi-touch, Hi-touch, Hi-tech 설계 개념이 적용되어 실용적이고 효율이 높은 엔진이 개발된 내용을 기술한다. 또한 세계시장-선박 보기엔진, 육상 발전엔진, 선박 추진엔진 시장-에 적용된 현황을 살피고 향후 보다 진보되고 환경친화형 엔진 공급을 구현하기 위한 내용이 간략히 소개된다.

조숙, 내병 및 내도복성 유채 1대잡종 ‘해안’

김광수(Kwang-Soo Kim),장영석(Young-Seok Jang),이영화(Yong-Hwa Lee),최규환(Kyu-Hwan Choi),강달순(Dal-Soon Kang),김성택(Seong-Taek Kim),최인후(In-Hu Choi),이경보(Kyeong-Bo Lee) 한국육종학회 2015 한국육종학회지 Vol.47 No.4

A new rapeseed (Brassica napus L.) F1 hybrid ‘Haean’ was crossed between ‘Mokpo-CGMS’, male sterile line and ‘8516-B-5-6-1-2’, restore line for the adaptation of paddy land culture with early maturing, disease resistant and lodging tolerance in 2008. Yield trials were conducted from 2009 to 2010 in Muan, and regional adaptation trials were examined from 2011 to 2013 in four regions. ‘Haean’ has dark green, cleft and parted leaf, light yellowish flower, and black seed color. The maturation date of ‘Haean’ is 4th June, 4 days earlier than ‘Sunmang’. In the regional adaptation trials, average yield of ‘Haean’ was 272 kg/10a, which was 6% higher than ‘Sunmang’. Seed oil content of ‘Haean’ was 44.2%. In fatty acid composition, oleic acid content is 69.8%, which is 2.5% higher than ‘Sunmang’. Total glucosinolates content was 1.84 mg/g. ‘Haean’ has characteristics of disease resistant and lodging tolerance, this variety can be cultured at paddy lands in southwestern area including Jeonnam, Jeonbuk and Kyongnam provinces and Cheju island of Korea.

개화 균일성이 좋은 내도복성 유채 중간모본 ‘중모 7002’

김광수(Kwang-Soo Kim),장영석(Young-Seok Jang),이영화(Yong-Hwa Lee),서태철(Tae-Cheol Seo),최규환(Kyu-Hwan Choi),강달순(Dal-Soon Kang),김성택(Seong-Taek Kim),이경보(Kyeong-Bo Lee) 한국육종학회 2015 한국육종학회지 Vol.47 No.3

‘Jungmo 7002’ is a intermediate parent of rapeseed (Brassica napus L.) with flowering uniformity and lodging tolerance for the scenery and oil production. ‘Jungmo 7002’ was developed from the cross between ‘RS10//Erra/Tower’ as female parent and ‘RS10’ as male parent in 1984. A promising line, ‘84013-B-6-3-3-6’, was selected and designated as the name of ‘Mokpo116’. It was prominent and had good result from regional adaptation yield trials (RYT) for three years from 2011 to 2013 and was released as the name of ‘Jungmo 7002’. ‘Jungmo 7002’ has middle parted and dark-green leaf, Brownish-green stem, yellowish flower and black seed coat. The flowering date of ‘Jungmo 7002’ was 16th April and ripening date was 9th June. The yield of ‘Jungmo 7002’ was 247 kg/10a, which was 19% higher than ‘Hanlayuchae’ in regional adaptation trials. This intermediate parent showed high resistance to lodging tolerance. The oil content of ‘Jungmo 7002’ was 44.3%. In fatty acid composition of ‘Jungmo 7002’ , oleic acid content is 70.8%, which is 3.3% higher than ‘Hanlayuchae’. And ‘Jungmo 7002’ has no erucic acid. ‘Jungmo 7002’ will be adaptable to southwestern area including Jeonllanam-do, Jeollabuk-do and Gyeongsangnam-do and Jeju island of Korea.

압축 공기 에너지 Saver 개발

김광수(Kwangsoo Kim),김명섭(Myoung Sub Kim),김강대(Kang Dae Kim),정덕채(Duk Chae Jung),김동수(Dong Soo Kim),최병오(Byung Oh Choi) 한국유체기계학회 2008 유체기계 연구개발 발표회 논문집 Vol.2008 No.-

In this paper, we designed sandwich type pressure regulator for air pressure control system. As a result of research, we obtained several important conclusion. First, we decided theory of popper valve and relief valve which are used in sandwich type pressure regulator, and then designed prototype of pressure regulator. Second, we organized circuit diagram of dual pressure regulator of air pressure control system.

Assist Bar를 활용한 유도전동기 성능 향상에 관한 연구

김동호(Dong-Ho Kim),이강빈(Kang-Been Lee),신동윤(Dong-Youn Shin),김인근(In-geun Kim),김광수(Kwang Soo Kim),김원호(Won-Ho Kim) 대한전기학회 2020 대한전기학회 학술대회 논문집 Vol.2020 No.7

해상화학사고 대응 교육교재 개발

김광수(Kwang-Soo Kim),이문진(Moonjin Lee),강원수(Wonsoo Kang) 한국해양환경·에너지학회 2018 한국해양환경·에너지학회 학술대회논문집 Vol.2018 No.5

최근에 위험·유해물질(HNS)의 해상운송과정에서 해상화학사고가 예전보다 더 자주 발생하고, 해상에 유출된 HNS는 폭발·화재·독성·인화성·부식성·오염을 초래할 수 있다. 따라서 국내에서도 해상 HNS 유출사고 대응 전문요원의 양성이 필요하다. 본 연구에서는 HNS 해상사고 대응 전문요원 양성을 위한 외국의 HNS 대응 교육내용 및 국제해사기구의 HNS 대응과정 매뉴얼 내용을 살펴보고, 국내 해상화학오염사고 대응 전문요원 양성을 위한 관리자 신규교육과정의 교육교재 개발(안)을 제시하였다. 이 교육교재 개발(안)은 국제해사기구의 HNS 대응과정 매뉴얼 내용뿐만 아니라 사고지휘체계, 위기관리, 우선순위결정, 긴급예산, 훈련계획, 도상훈련실습 등과 같은 외국의 HNS 대응 교육 관련 주요내용을 포함하도록 고안되었다. In recent years, marine chemical pollution incidents have occurred at sea more frequently than before in the process of marine transportation of HNS (Hazardous and Noxious Substances), and HNS spills may cause explosion, fire, toxicity, flammability, corrosion and pollution. Thus, it is necessary to educate and train professional personnel for response to marine HNS spill incidents in Korea. This study shows the existing contents of foreign countries’ education materials and IMO"s HNS manuals for training the professional personnel of manager level responding to marine HNS spill incidents, and presents the development plan of domestic education textbook for training professional personnel of manager level in response to marine chemical pollution incidents in Korea. The development plan of education textbook for manager level is designed to contain foreign countries’ HNS-related major education contents such as Incident Command System, Crisis Management, Risk Assessment, Priority, Urgent Budget, Training Plan and Tabletop Exercise as well as education contents of IMO’s HNS response course manuals.

강섬유보강 TBM 세그먼트 휨-축력 시험

김광수(Kim, Kwang Soo),강태성(Kang, Tae Sung) 한국콘크리트학회 2022 한국콘크리트학회 학술대회 논문집 Vol.34 No.2