에어볼 발파공법의 현장적용 사례연구

강대우,이신,김상욱 東亞大學校 建設技術硏究所 2005 硏究論文集 Vol.28 No.2

발파로 인한 환경적 문제는 주로 진동과 폭음에 대한 영향이나, 발파로 인한 파쇄도 및 경제성에 관해서도 효율적인 발파공법들이 많이 개발되고 있다. 이러한 문제를 해결하기 위한 방법으로 선진국에서 많이 사용되는 방법이 air decking을 이용하는 발파방법이다. 이미 선진국의 발파현장에서는 air decking 기술을 이용한 다양한 발파방법으로 VARI-STEM, GAS-BAG, POWER DECK 등이 이용되어지고 있다. 본 연구에서는 이들 중에서 Air ball 제품을 이용한 발파공법에 대하여 연구하고 국내 현장적용과 효과에 대하여 분석하였다. 그 결과 발파진동의 경우에는 약 30 ~ 40% 정도의 감쇄효과가 나타났고, 화약량의 경우 20 ~ 25%정도의 감소를 보였다. 또한 폭음의 경우에도 Air ball을 이용한 발파가 효과적이었으나 분석결과의 결정계수가 낮아 이는 더 많은 실험을 통하여 다시 분석해야 할 것으로 생각된다.

휘발성유기화합물의 배출원 구성물질 성분비에 관한 기초 연구

이영재,이학성,강병욱,신대윤 한국환경과학회 2003 한국환경과학회지 Vol.12 No.4

The purpose of this study was to develop the preliminary source fingerprints of volatile organic compounds(VOC). The source categories studied were vehicles, gasoline vapor, gasoline storage tank, coating, dry cleaning and road covering. The source samples were collected using 6L electro-polished stainless steel canisters for about 20 seconds. From this study, the main component emitted from VOC sources in Korea was toluene. The toluene proportion for road covering, vehicles, coating and gasoline vapor were 35, 18, 16 and 5%, respectively, The C_2-C_5 alkane and alkene compounds were mainly emitted from vehicles, gasoline vapor and gasoline storage tank, The main compounds of coating were m/p-xylene(34%), toluene(16%), 1,2,4-TMB(22%) and 1,3,5-TMB(13%) were mainly emitted.

Characterizing the Seed Properties of a High-Lysine Barley Mutant (Hordium vulgare, cv. M98) using Amino Acid Analysis and Proteomic Approach

Dea Wook Kim,Hong Sik Kim,Sun Lim Kim,Hwa Young Heo,Kwang Geun Park,Randeep Rakwal,Si Ju Kim 한국육종학회 2007 한국육종학회 학술발표회 발표요지 Vol.39 No.-

Inabenfide-Induced Alleviation of Salt Stress in Rice as Linked to Changes in Salicylic Acid Content and Catalase Activity

Dea-Wook Kim,Hiroko Sawada,Katsuichiro Kobayashi,Ie-Sung Shim 한국작물학회 2007 Journal of crop science and biotechnology Vol.10 No.1

The effect of inabenfide was investigated in rice seedlings subjected to salt stress in relation to changes in chlorophyll fluorescence (Δ F/Fm’), lipid peroxidation, salicylic acid (SA) content, and catalase (CAT) activity. A reduction in shoot growth of rice seedlings by 120 mM NaCl treatment was significantly alleviated by pretreatment with 30 μM inabenfide. Sodium ion content was not affected by pretreatment with inabenfide, suggesting that alleviation was not due to a reduction in sodium ion uptake by the rice seedlings. At three days after NaCl treatment, the rice seedlings pretreated with inabenfide showed a higher ΔF/Fm’ (30%) and lower lipid peroxidation (28%) compared with the rice seedlings treated with NaCl alone. After NaCl treatment, CAT activity in the third leaf of rice seedlings decreased significantly but alleviated by pretreatment with inabenfide. Furthermore, pretreatment with inabenfide also reduced the level of SA which accumulated drastically in the third leaf of rice seedlings within a day after exposure to salt stress. These results suggest that inabenfide prevents SA accumulation in rice seedlings under salt stress which eventually induces the alleviation of salt stress damage. The effect of inabenfide was investigated in rice seedlings subjected to salt stress in relation to changes in chlorophyll fluorescence (Δ F/Fm’), lipid peroxidation, salicylic acid (SA) content, and catalase (CAT) activity. A reduction in shoot growth of rice seedlings by 120 mM NaCl treatment was significantly alleviated by pretreatment with 30 μM inabenfide. Sodium ion content was not affected by pretreatment with inabenfide, suggesting that alleviation was not due to a reduction in sodium ion uptake by the rice seedlings. At three days after NaCl treatment, the rice seedlings pretreated with inabenfide showed a higher ΔF/Fm’ (30%) and lower lipid peroxidation (28%) compared with the rice seedlings treated with NaCl alone. After NaCl treatment, CAT activity in the third leaf of rice seedlings decreased significantly but alleviated by pretreatment with inabenfide. Furthermore, pretreatment with inabenfide also reduced the level of SA which accumulated drastically in the third leaf of rice seedlings within a day after exposure to salt stress. These results suggest that inabenfide prevents SA accumulation in rice seedlings under salt stress which eventually induces the alleviation of salt stress damage.

Light/Dark Responsiveness of Kinetin-Inducible Secondary Metabolites and Stress Proteins in Rice Leaf

Dea-Wook Kim 한국작물학회 2007 Journal of crop science and biotechnology Vol.10 No.2

Kinetin (KN) is an inducer of rice (Oryza sativa L.) defense/stress responses, as evidenced by the induction of inducible secondary metabolite and defense/stress protein markers in leaf. We show a novel light-dependent effect of KN-triggered defense stress responses in rice leaf. Leaf segments treated with KN (100 μM) show hypersensitive-like necrotic lesion formation only under continuous light illumination. Potent accumulation of two phytoalexins, sakuranetin, and momilactone A (MoA) by KN that peaks at 48 h after treatment under continuous light is completely suppressed by incubation under continuous dark. Using two-dimensional gel electrophoresis we identified KN-induced changes in ribulose-1, 5-bisphosphate carboxylase/oxygenase, energy- and pathogenesisrelated proteins (OsPR class 5 and 10 members) by N-terminal amino acid sequencing and mass spectrometry. These changes were light-inducible and could not be observed in the dark (and control). The present results provide a new dimension (light modulation/regulation) to our finding that KN has a potential role in the rice plant self-defense mechanism. Kinetin (KN) is an inducer of rice (Oryza sativa L.) defense/stress responses, as evidenced by the induction of inducible secondary metabolite and defense/stress protein markers in leaf. We show a novel light-dependent effect of KN-triggered defense stress responses in rice leaf. Leaf segments treated with KN (100 μM) show hypersensitive-like necrotic lesion formation only under continuous light illumination. Potent accumulation of two phytoalexins, sakuranetin, and momilactone A (MoA) by KN that peaks at 48 h after treatment under continuous light is completely suppressed by incubation under continuous dark. Using two-dimensional gel electrophoresis we identified KN-induced changes in ribulose-1, 5-bisphosphate carboxylase/oxygenase, energy- and pathogenesisrelated proteins (OsPR class 5 and 10 members) by N-terminal amino acid sequencing and mass spectrometry. These changes were light-inducible and could not be observed in the dark (and control). The present results provide a new dimension (light modulation/regulation) to our finding that KN has a potential role in the rice plant self-defense mechanism.

Effect of Rice Cultural Practices on Water Percolation, Irrigation Requirement, and Nitrogen Leaching under Lysimeter Condition

Dea-wook Kim,Je-Cheon Chae,Sung-Won Kim 韓國作物學會 2001 Korean journal of crop science Vol.46 No.1

In this lysimeter experiment, temporal changes of water percolation rate, irrigation requirement and No3 --N leaching were investigated under different cultural practices that were no-till direct seeding on flooded paddy (NTDSF), till direct seeding on flooded paddy (TDSF), and transplanting. The highest water percolation rate of 3,001 l/m2 was measured in NTDSF. Others were 2,551 l/m2 and 2,210 l/m2 in TDSF and transplanting. Water percolation rate in NTDSF and TDSF was increased by 36% and 15% compared to transplanting. Water percolation rates in all cultural practices were increased remarkably from the reproductive growth stage and relatively large amount of water loss through percolation was measured even after the reproductive growth stage. A total irrigation requirement was 3,469 l/m2 in NTDSF and 2,898 l/m2 in TDSF. That was equivalent to 45% and 21 % of increase compared to 2,389 l/m2 in transplanting. The largest No3 --N leaching through the entire rice growing period was 701 mg/m2 in NTDSF and was followed by 494 mg/m2 in TDSF and 465 mg/m2 in transplanting. The ratios to the total amount of No3 --N leaching at the vegetative growth stage, reproductive growth stage and ripening stage were 31 %, 41 % and 28% in NTDSF; 21 %, 48% and 31 % in TDSF; and 18%, 48% and 35 % in transplanting.

Gene Transcription in the Leaves of Rice Undergoing Salt-induced Morphological Changes (Oryza sativa L.)

Dea-Wook Kim,Junko Shibato,Ganesh Kumar Agrawal,Shinsuke Fujihara,Hitoshi Iwahashi,Du Hyun Kim,심이성,Randeep Rakwal 한국분자세포생물학회 2007 Molecules and cells Vol.24 No.1

지방자치단체 공공애플리케이션의 실태와 개선방안

김대욱(Dea-Wook Kim),윤영근(Young-Geun Yoon) 한국콘텐츠학회 2016 한국콘텐츠학회논문지 Vol.16 No.2

본 연구는 지방자치단체의 공공애플리케이션에 대한 실태조사와 그 개선방안을 제시하였다. 이를 위해 실태조사를 위한 분석요소를 선정하고 분석틀을 구축하였다. 구축실태는 전체 광역자치단체의 공공애플리케이션 구축실태를 조사하였고, 운영실태는 서울시의 공공플리케이션 운영사례를 조사하였다. 실태조사 결과 지방자치단체 차원에서의 공공애플리케이션과 관련된 제도적 지침이 마련되지 않았으며, 지방자치단체의 공공애플리케이션은 투입된 비용에 비해 활용도가 매우 저조하였다. 또한 무분별한 개발, 수요의 미반영, 체계적인 관리의 부재 등과 같은 문제점을 노출하였다. 이의 개선방안으로는 구축측면에서 정확한 수요파악, 면밀한 타당성 검토, 실효성 있는 정보제공 및 쌍방향 상호작용앱의 활성화를 제시하였고, 운영측면에서는 공공애플리케이션 운영조례마련, 적절한 관리체계 설계, 주기적인 점검, 교육과 적극적 홍보를 제시하였다. This study suggests, based on analysis of current status, improvement plans for the local government’s public mobile applications. Fist of all, this study selected analysis elements and established an analysis framework for public mobile applications. Then the study analyzed the applications developed by all local government and application management practices in Seoul-City. The status of public applications shows that there are no institutional guidelines and the practical use of the public application is low in relation to the invested costs. Additional problems are the imprudent development, non-reflection of demand, absence of systemic management. For the improvement plans, the study suggests understanding of exact demand, detailed examination of validity, offering of effective information and the utilization of double-way interaction application. The management side of the improvement plans addresses the preparing for public application ordinance, building proper management system, regular check, education and active promotion.

보리의 생육초기 염 스트레스에 따른 생리적 반응과 프로테옴 변화

김대욱 ( Dea Wook Kim ),윤성근 ( Seong Kun Yun ),박형호 ( Hyoung Ho Park ),황종진 ( Jong Jin Hwang ),한옥규 ( Ok Kyu Han ),박태일 ( Tae Il Park ),정건호 ( Gun Ho Jung ),이재은 ( Jae Eun Lee ),김선림 ( Sun Lim Kim ),정영호 ( Young 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.5

This study was conducted to obtain basic information on physiological and proteomic responses of barley seedlings to salt stress. Shoot dry weight decreased significantly as the level of soil salinity increased. Salt stress-induced decrease of relative shoot dry weight was lower in cv. "Sanglok" than in cv. "Sunwoo". Under the salt stress, SPAD value decreased, and the value was higher in cv. "Sanglok" than in cv. "Sunwoo". Sodium ion content in the leaves increased as NaCl concentration increased, and the content was higher in cv. "Sunwoo" than in cv. "Sanglok". The K+/Na+ratio was higher in cv. "Sanglok" than in cv. "Sunwoo". Salt stress-induced alterations in protein expression of the leaves were detected by two dimensional electrophoresis, and 47 protein spots showing altered expression were selected. Among the selected protein spots, 17 protein spots were up-regulated and 28 spots down-regulated in cv. "Sanglok". In cv. "Sunwoo", 14 protein spots were up-regulated and 27 spots down-regulated. Out of 47 deferentially expressed protein spots, 18 protein spots were identified using mass spectrometry and NCBI protein database. Among the identified proteins, ten proteins are known to be involved in various stress responses, but the others are not directly involved in stress responses.

정보검색 기술을 이용한 비교사 학습 기반 문서 분류 시스템 개발

노대욱(Dea-Wook Noh),이수용(Sooyong Lee),나동열(Dong-Yul Ra) 한국정보과학회 언어공학연구회 2006 한국정보과학회 언어공학연구회 학술발표 논문집 Vol.2006 No.10

문서분류기의 개발에 있어 교사학습기법을 이용할 경우 많은 양의 사람에 의한 범주 부착 말뭉치가 필요하다. 그러나 이의 구축은 많은 시간과 노력을 필요로 한다. 최근 이러한 범 주 부착 말뭉치 대신 원시말뭉치와 범주마다 약간의 씨앗 정보를 이용하여 학습을 수행하여 문서분류기를 개발하는 방법론이 제시되었다. 본 논문에서는 이 방법론 하에서 다른 연구에서의 결과보다 좋은 성능을 나타내는 비교사 학습 기법을 소개한다. 본 논문에서 제시하는 기법의 특정은 씨앗 단어에서 출발하여 평균상호정보를 이용하여 다른 대표단어 및 그들의 가중치를 학습한 다음, 정보검색에서 많이 사용하는 기술을 이용하여 그 가중치를 갱신하는 것이다. 그리고 이 과정을 반복 수행하여 최종적으로 높은 성능의 시스템을 개발할 수 있음을 제시하였다.