경상분지내 동광상 관련 진동화강암류에 대한 지화학적 연구

이재영,이진국,박법정,이인호,김상욱,Lee, Jae Yeong,Lee, Jin Kook,Park, Beob Jeong,Lee, In Ho,Kim, Sang Wook 대한자원환경지질학회 1994 자원환경지질 Vol.27 No.2

Jindong Granites are plotted mainly in the region of granodiorite~diorite of the Streckeisen's diagram, while Yucheon-Eonyang Granites and Onjonri Granites in the region of monzo-granite and monzo-granite~granodiorite, respectively. Jindong Granites show a differenciation trend of calc-alkaline magma, and its magmatic evolution from intermediate to acidic rocks, which might form mineralizing solution, is consistant with the general path of the Cretaceous granitic rocks including Yucheon-Eonyang Granites and Onjongri Granites. The differenciation index (D.I.) is 35~80 for Jindong Granites, which is lower than 85~95 of Yucheon-Eonyang Granites and is partly overlapped by 67~84 of Onjongri Granites. There is clear difference in content of some major and trace elements between Jindong Granites of Cu province and the other granitic rocks of Pb-Zn and Mo provinces. Between these metallogenic provicnes, Cu content is high in Jindong Granites near Haman-Gunbuk mineralized zone, while Pb and Zn are relatively abundant in Yucheon-Eonyang Granites and Mo in Onjongri Granites. Therefore, Jindong Granites of the Cu province are distinguishable by chemical compositions and their related geochemical characteristics from the other Cretaceous granitic rocks of Pb-Zn and Mo provinces. However, the content of Cu and Cl in biotite is applicable to distinguish a productive phase from a barren phase of Jindong Granites, because Cu and Cl show a trend to be concentrated in biotite of Jindong Gratites in the Haman-Gunbuk mineralized zone.

경상분지내 열수광상의 광화작용과 백악기 화강암류의 화학성분 변화와의 관계

이재영,이진국,이인호,김상욱,Lee, Jae Yeong,Lee, Jin Kook,Lee, In Ho,Kim, Sang Wook 대한자원환경지질학회 1994 자원환경지질 Vol.27 No.4

The Cretaceous granitic rocks show differences in rock types and chemical compositions according to metallogenic provinces of copper, lead zinc and molybdenum in the Gyeongsang basin. Jindong granites are of granodiorite~quartz diorite~diorite in Cu-province; Makeunsan/Yucheon-Eonyang granites, granodiorite~granite in Pb Zn-province; Onjeongri-Yeonghae granites, granodiorite~quartz diorite in Mo-province, and there is a trend that productive masses are less differenciated than barren masses in Cu and Pb-Zn provinces whereas productive masses are more differenciated than barren masses in Mo province. Metallogenic provinces are distinguishable by variations of major and trace elements. The Cretaceous granitic rocks are highest in the content of Ca, Mg and other basic major elements and lowest in the content of K and Na in Cu provicne; the variation trends are vice versa in Pb-Zn province. Trace elements such as Rb and Sr show variations related to K and Ca, and metallogenic provinces are also distinguishable by their ratios. The granitic rocks of Mo province have intermediate content of major and trace elements, but are clearly distinguishable from Jindong granites and partly overlapped by Yucheon-Eonyang granites. Chlorine content in biotites is higher in a productive mass than in a barren mass in Cu province. Therefore, the mineralogical and chemical compositions are applicable as geochemical index to distinguish the types of mineralizaion, and productive and barren masses of the Cretaceous granitic rocks in the Gyeongsang basin.

경북지역 폐금속광산이 환경에 미치는 영향

이재영,김종근,이인호,이진국,Lee, Jae Yeong,Kim, Jong Gun,Lee, In Ho,Lee, Jin Kook 대한자원환경지질학회 1993 자원환경지질 Vol.26 No.4

The heavy metal contents are more abundant in stream waters, paddy soils and rice plants in the vicinity of abandoned mines compared to the surrounding areas in the Kyungpook province. However, these contents tend to decrease with distance from mines, and show some variation under different geological and geochemical environments. The Sin-stream waters have high contents of Cu=4.9 ppm, Pb=0.1 ppm, Zn=3.5 ppm and other heavy metals (Ni, Co, Cd) at Dalsung abandoned mine and low contents of Cu=0.4 ppm, Pb=0.1 ppm, Zn=0.1 ppm and other metals= 0.002 ppm in the surrounding area. The high contents decrease in the downstream in the area of calcareous sedimentary rocks. The paddy soils have high contents of approximately Cu=51 ppm, Pb=83 ppm, Zn=211 ppm, and Cd=11.3 ppm in the vicinity of Gunwi abandoned mine but low contents of Cu=4.5 ppm, Pb=2.9 ppm, Zn=60 ppm and Cd=0.4 ppm in the surrounding area. The Dadeog abandoned mine also shows similar trends to Gunwi mine. The contents of heavy metals of rice plants are high in the roots but trends to decrease through stem+leaf and become low in brown rices.

천연 벤토나이트로부터 합성된 제올라이트 A의 특성

이재영,조승래,이홍기,심미자,이주성,김상욱,Lee, Jae-Yeong,Jo, Seung-Rae,Lee, Hong-Gi,Sim, Mi-Ja,Lee, Ju-Seong,Kim, Sang-Uk 한국재료학회 1995 한국재료학회지 Vol.5 No.8

경북 감포지역에서 산출되는 천연 벤토나이트를 이용하여 제올라이트를 합성하였으며 세제용 builder로서 가능성을 연구하였다. 최적의 합성조건은 기질의 몰비가 SiO$_2$/Al$_2$O$_3$=2, $Na_2$O$_3$/Al$_2$O$_3$=1, $H_2O$/A1$_2$O$_3$=30이고 9$0^{\circ}C$에서 3시간 반응시킬 경우였고, 이 조건에서는 A형 제올라이트가 합성되는 것을 XRD를 통하여 확인하였다. 최적 조건에서 합성된 제올라이트의 이온교환능을 측정하기 위하여 경도 40$^{\circ}$Dh의 CaCl$_2$용액과 3$0^{\circ}C$에서 IS분 접촉시킨 결과 264.9mg CaO/g-zeolite 정도로 우수한 값을 나타내었다. 이 시료의 백색도는 89%이었고, 평균 입자크기는 9.95$\mu\textrm{m}$이었다. Synthetic zeolite was prepared by using of natural bentonite from Kampo area and the application of detergent builder was investigated. The optimum synthetic condition was SiO$_2$/Al$_2$O$_3$= 2, Na$_2$O/A1$_2$O$_3$=1, H$_2$O/A1$_2$O$_3$=30 at 90$^{\circ}C$ for 3hr and it was found by XRD analysis that the zeolite synthesized under this condition was type A. When the zeolite A synthesized under the optimum condition was contacted with 40$^{\circ}$Dh CaCl$_2$solution at 30$^{\circ}C$ for 15min, the cation exchange capacity was 264.9mg CaO/g-zeolite. And the whiteness of the sample was 89% and the mean particle size was 9.95$\mu\textrm{m}$.

금속폐광산주변의 토양, 식물 및 하천의 중금속오염에 대한 지화학적 연구 -달성 및 경산광산-

이재영,이인호,이순영,Lee, Jae Yeong,Lee, In Ho,Lee, Sun Yeong 대한자원환경지질학회 1996 자원환경지질 Vol.29 No.5

The tonnage of copper and tungsten produced at Dalseong mine by Taehan Tungsten Mining Company from 1961 to 1971 was 48,704 tons (M/T) of 4 wt.% Cu and 1,620 tons (S/T) of 70wt.% WO, but the mine was closed in 1974. Kyeongsan mine is a small abandoned cobalt mine with no data of production. To investigate the pollution level of the mine areas, soils, plants (Ohwi and Pampanini), stream waters and stream sediments were taken and Fe, Mn, Cu, Pb, Zn, Ni, Co, Cd and Cr were analysed by ICP. Soils are considerably contaminated by the heavy metals related to ore deposits, The heavy metal contents in plants vary with the species and parts of plants. Stream waters are anomalously high in heavy metals in the vicinity of the mines but the contents decrease downstream in the process of dilution and precipiation. However, heavy metal contents increase very high in stream sediments due to precipiation. To protect environmental damages caused by acid mine drainages wetlands must be constructed outside pits, and it is necessary to fill pits with waters, limestone chips and organic materials, which give reducing and alkaline condition to ores. Under the condition pyrite is protected from oxidation and aqueous iron sulphates precipitate to form stable secondary pyrite.

DGEBA / MDA / GN 계의 기계적 성질 및 파단 특성

이재영,심미자,김상욱 ( Jae Young Lee,Mi Ja Shim,Sang Wook Kim ) 한국공업화학회 1995 공업화학 Vol.6 No.2

DGEBA(diglycidyl ether of bisphenol A)/MDA(4,4`-methylene dianiline)/GN(glutaronitrile)계의 기계적 성질 및 파단 특성을 살펴보기 위해 GN의 함량에 따른 충격시험과 인장시험을 행하였고, SEM을 통하여 파단면을 관찰하였다. GN의 함량이 증가함에 따라 충격강도가 증가하였으며, GN 함량이 20phr인 경우에는 48% 개선되었다. 그러나 인장강도는 감소하였다. DGEBA/MDA 계의 파단면은 brittle한 형상을 나타내었고, GN이 첨가된 계는 상대적으로 ductile한 형상을 나타내었으며, 변형이 일어난 것을 확인할 수 있었다. To investigate the mechanical properties and the fracture characteristics of DGEBA/MDA/GN system, impact test and tensile test were performed with various GN contents. The fracture surface was observed by SEM. Impact strength increased with the increase of GN content and improved about 48% at 20phr of GN content. But tensile strength decreased with the increase of GN content. The fracture surface of DGEBA/MDA system without GN displayed typically brittle morphology, but that of the system with GN showed relatively ductile morphology and deformation was found.

모바일 Ad Hoc 네트워크에서 AODV 프로토콜의 성능 향상을 위한 라우팅 공격 탐지

이재영,최승권,이병록,김선철,신병곤,조용환,Lee, Jae-Young,Choi, Seung-Kwon,Lee, Byong-Rok,Kim, Sun-Chul,Sin, Byoung-Gon,Cho, Yong-Hwan 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.6a

Mobile Ad Hoc 네트워크는 이동 노드가 라우터의 역할을 하기 때문에 라우터에 보안 대책을 마련하는 유선 환경의 네트워크와는 다른 보안 대책이 필요하며 이동 노드의 전송영역이 전 네트워크를 포함하지 못하기 때문에 한 노드가 다른 노드로 메시지를 보낼 때 중간 노드가 필요하게 되는데 중간 노드가 신뢰할 수 없는 악의적인 노드라면 안전한 메시지의 전송은 보장할 수 없게 된다. 또한 네트워크를 구성하는 모든 노드는 이동 노드이기 때문에 제한된 용량의 배터리와 제한된 자원을 이용하기 때문에 메시지 전송 시 많은 자원을 필요로 하는 암호화를 수행하기가 어려워지고 그 때문에 유선 환경의 네트워크 보다 보안에 취약 할 수밖에 없다. 마지막으로 네트워크를 구성하는 노드들의 이동성으로 인해 네트워크의 토폴로지가 계속적으로 변화하기 때문에 네트워크의 특성에 맞는 보안 대책이 필요하다. 이에 모바일 Ad Hoc 네트워크에서 AODV 프로토콜의 성능 향상을 위한 라우팅 공격 탐지를 제안한다. Since the mobile node acts as the router, the Mobile Ad Hoc network requires the security methods that are different from that of network of the wire environment. Also, since the total network can't be included in the transmission area of the mobile node, when one node sends the message to the other node, we need the middle node. But if the middle node is the unreliable malicious node, we can't guarantee the secure message transmission. Also, because all nodes configuring the network are the mobile nodes, they use the restricted battery capacity and the restricted resources. Therefore, because we have trouble performing the encryption that many resources are required when we sending the message, it is vulnerable to the security than the network of the wire environment. Last, because the network topology continues to change by the mobility of nodes configuring the network, we need the security measure that matches the network characteristics. We suggest the routing attack detection for performance enhancement of AODV protocol in Mobile Ad Hoc networks.

대전광역시

이재영,Lee, Jae-Yeong 대한교통학회 2006 교통 기술과 정책 Vol.3 No.3

시나리오 기반 하천-제내지 연계 통합수리해석에 의한 홍수위험도 산정

이재영,남명준,권현한,김기영,Lee, Jae Young,Nam, Myeong Jun,Kwon, Hyun Han,Kim, Ki Young 한국수자원학회 2016 한국수자원학회논문집 Vol.49 No.9

본 연구에서는 시나리오 기반의 홍수위험도를 산정하기 위해 하천-제내지 통합수리 해석모형이 적용되었다. 적용대상 유역으로 낙동강 및 금호강이 위치한 대구 성서공단 인근을 선정하여 하천홍수 발생으로 인한 시간별 범람수심 및 범람유속을 산정하였다. 하천-제내지 통합수리해석에 의한 2차원 범람해석은 100년/200년 빈도 신뢰구간 상한치(97.5%)에 의한 제방월류 시나리오와 100년/200년 빈도 신뢰구간 평균치(50%)에 의한 파제 시나리오로 구성하여 수행되었다. 또한 제내지 범람에 의한 위험도 산정을 위해 2차원 홍수범람도로부터 예측된 각 절점에 대한 최대 침수심 및 유속에 대한 정보를 이용하여 등급화를 실시하였다. 본 연구결과는 제방월류 및 파제에 따른 제내지의 비상대처계획(EAP) 수립에 정량적인 근거자료로 제시하는데 매우 유용할 것으로 사료된다. A coupled river-overland hydrodynamic model was applied to estimate flood risk by a scenario-based approach. The study area is Seongseo Industrial Complex in Daegu which is located near Nakdong river and Geumho river. Inundation depth and velocity at each time were calculated by applying a coupled 1D/2D hydrodynamic model to the target area of interest. The 2D inundation analysis for river and overland domain was performed with the scenario-based approach that there are levee overflow against 100/200 year high quantile (97.5%) design flood and levee break against 100/200 year normal quantile (50%) design flood. The level of flood risk was displayed for resident/industrial area using information about maximum depth and velocity of each node computed from the 2D inundation map. The research outcome would be very useful in establishing specified emergency action plans (EAP) in case of levee break and overflowing resulting from a flood.

PAN 섬유 표면에서 성장하는 ZnO 나노로드의 제조 및 이를 이용한 황화합물 제거 특성

이재영,한경식,정인수,이홍기,LEE, JAEYOUNG,HAN, KYEONGSIK,JEONG, INSOO,LEE, HONGKI 한국수소및신에너지학회 2018 한국수소 및 신에너지학회논문집 Vol.29 No.3

Zinc oxide (ZnO) nanorods were grown on a palladium (Pd) activated polyacrylonitrile (PAN) fiber where Pd activation was carried out in advance by the following dry process: palladium(II) bis(acetylacetonate), $Pd(acac)_2$ was sublimed, penetrated into the surface of PAN fiber and spontaneously reduced to Pd nanoparticles at $180^{\circ}C$ for various times under a nitrogen atmosphere. ZnO nanorod morphology was observed by a scanning electron microscopy (SEM) and the elemental composition was confirmed by energy-dispersive X-ray spectroscopy (EDS). The crystalline structure of ZnO nanorods was analyzed by X-ray diffraction (XRD) analysis showing Wurtzite structure consisting of hexagonal lattice. Sulfur removal characteristics were evaluated.