http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
고흥 미복산 부근에 분포하는 심성암류의 암석지구화학과 금함량
윤정한 대한자원환경지질학회 1999 자원환경지질 Vol.32 No.6
Plutomic rocks of the Mabogsan, located in the southestern part of the Koheung Eup are composed of granite gneiss, diorite, biotite grantie and granophyre. On the basis of Rb-Ba-Sr diagram, the diorires are plotted from granodiorite to quartz diortie, the biotite granites from granodiortie to anomalous granite and the granophyres in normal granite filed. The plutonic rocks tend to show the I-type characteristics in terns of ACF diagram, $K_2O-Na_2O$ diagram and $Al_2O_3/Na_2O+K_2O+CaO$ diafram, while have values of ilmenite series in magnetic subseptibility. The plutons could have formed in the tectonic environment of VAG+COLG+ORG based on the silica vs. trace element diagrams. Gold contents with major and trace elements have been determined for 21 granophyres, 13 biotite granites and 4 diorites are; (1) for the diorite, the rangs is 0.508~1.73 ppb with an average of 0.5ppb;(2) for the biotite granites, the range is 0.449~13.5ppb with an average of 3 ppb;(3)for the granphyres, the range is 0.508~23.1ppb with an average of 4.5ppb. The gold content of the studied plutons tends to increase from mafic to felsic rocks. Gold contents tend to show positive correlations with those of Ag and Zn, negative correlations with those of As, Ba and Rb. The copper contents of the plutons are comparatively high. Average copper contents of diorite, biotite granite and granophyre are 710ppm, 587ppm and 484ppm, respectively. The copper contents of the plutons tend to have good correlations with those of Ag, Bi and Pb.
한국(韓國) 남서부(南西部)의 덕음(德蔭)과 전주(全州)-금은광상(金銀鑛床)에 대(對)한 암석지구화학적(岩石地球化學的) 연구(硏究)
윤정한,전용원,전효택,Yoon, Chung Han,John, Yong Won,Chon, Hyo Taek 대한자원환경지질학회 1988 자원환경지질 Vol.21 No.4
Minor elements such as Ag, As, Au, Bi, Cd, Cu, Co, Ni, Pb, Rb, Sb, Sr and Te were analyzed by atomic absorption spectrophotometry and induced coupled plasma spectrophotometry in order to investigate pathfinders for gold in quartz porphyry, granite porphyry and vein materials in Jeonjuil gold - silver mine, and in altered biotite granites and vein materials in Dukum gold - silver mine. In Dukum gold - silver mine, it is observed that Au contents have positive relation with As, Co, and Rb contents, but negative relation with Bi contents in altered biotite granites. Au contents have positive relation with Ag, As, Co and Te contents in vein materials. In Jeonjuil gold - silver mine, it is observed that Cd, Rb, Sr and Te are enriched near ore vein in quartz porphyry and granite porphyry. Au contents have positive relation with As, Cd, Cu, $Fe_2O_3$ and $K_2O$ in vein materials.
사지 운동성 행위상실증을 주소로 내원한 전두측두엽 치매 환자1 예
윤정한,서미경,이상미,문소영 대한치매학회 2008 Dementia and Neurocognitive Disorders Vol.7 No.2
A 59-year-old, right-handed woman developed bilateral clumsiness of the hands and dysarthria 6 months prior to admission. A detailed neurologic evaluation showed limb-kinetic apraxia with frontal lobe dysfunction. Brain MRI showed significant anterior temporal lobar atrophy. Brain PET revealed bilateral decreases in glucose metabolism around the motor cortices and temporal lobes, predominantly on the right side. This case suggests that limb-kinetic apraxia is a presenting symptom of frontotemporal dementia.
윤정한,김진섭,박홍규 한국무역연구원 2020 무역연구 Vol.16 No.1
Purpose – This study has attempted to find appropriate factors of blockchain adoption in Korea related to maritime and port logistics industry to improve the application and implementation strategy of blockchain technology for maritime logistics. Design/methodology/approach– Lack of secondary data led to conduct survey for data collection and the Analytic Hierarchy Process (AHP) were adopted in order to analyze the priorities of rational decision making process. Findings– First, logisticians have difficulties getting a clear idea on the benefits and successful blockchain adoption, while consultants and academics worry more about the technological maturity of blockchain. Second, the adoption of blockchain technology into maritime port logistics has shown that competitive edge of the industry is still highly influenced by economic factors which is mostly related to financial and time related aspects. Research implications or Originality– Until now, there have been very few research conducted by experts on the field in both blockchain technology and maritime port logistics. Thus, this research has attempted to find the factors in adopting blockchain technology in Korean maritime logistics industry.
윤정한,오근창,Yoon, Chung-Han,Oh, Keun-Chang 대한자원환경지질학회 1996 자원환경지질 Vol.29 No.3
One hundred of thirty volcanic rocks col1ected from the Jeju island, Jeongog, Guryongpo and other areas were analyzed for major elements and trace elements with Au by inductively coupled argon plasma and graphite furnace atomic absorptiom spectrometry. The Au content is the highest values (0.2~43.4 ppb, average; 10.34 ppb) from the Jeju island volcanic rocks and the lowest (0.5~11.0 ppb, average; 1.23 ppb) from the Guryongpo volcanic area. The content of Au tends to be higher in the Quarternary volcanic rocks than Tertiary or Cretaceous volcanic rocks. The Au content of the calc alkali volcanic rocks tends to increase from mafic to felsic volcanic rocks, but that of the alkalic volcanic rocks tends to increase from felsic to mafic volcanic rocks. The Au content of the volcanic rocks collected from the Jeju island shows the highest values in the feldspar olivine basalts. Elements or oxides which have positive or negative correlations with Au are Ag, Mo, Rb, V, Y, $K_2O$, MgO and $SiO_2$, but other elements analyzed are not shown correlations with Au. It has a tendency to show that samples from the Jeju with 5 ppb gold and more are plotted in the non-Dupal area and those with less than 5 ppb gold in the Dupal area, while those from the Jeongog with 5 ppb gold and more are plotted in the Dupal area and those with less than 5 ppb gold in the non-Dupal area, in the Ba/Nb-La/Nb, Zr/Nb-Ba/Nb diagrams. It shows that samples from the Jeju and Guryongpo with high gold content are plotted in the within-plate, while those with low gold content are plotted in the arc-related area, and those from the Jeongog are scattered in the $TiO_2-Al_2O_3$, $Zr/A1_2O_3-TiO_2/Al_2O_3$ diagrams.