$Cr_2O_3$계 용사분말의 제조조건 및 용사거리에 따른 플라즈마 용사 코팅층의 특성

김의준 한국분말야금학회 1999 한국분말재료학회지 (KPMI) Vol.6 No.3

Oxide powders of $Cr_2O_3 \;and\;Cr_2O_3+3{\%}TiO_2$ were prepared by spray drying, plasma densification and fused+crushed processes. The oxide coating layers were made by plasma spray and characterized by microstructure, hardness, adhesion strength and relative density. The optimum spray distance for the high quality coatings by spraying dried powders was found to be 9cm. A small amount addition of $TiO_2\;in\;Cr_2O_3$ powder significantly improved coating characteristics by lowering the melting point of powders. The hardness and relative density of coating layers of the plasma densified powders were comparable to fused and crushed powders, however, the adhesion strength was much higher in the former case.

New discoveries, skarn zonation, and skarn textures at the Geodo Mine in the Taebaeksan Basin, South Korea

김의준,양석준,신승욱,남형태,신동복,임헌경,오일환,노상건,조성준,박맹언 한국지질과학협의회 2018 Geosciences Journal Vol.22 No.6

The Geodo skarn deposit is located in the Taebaeksan Basin, central eastern Korean Peninsula. The geology of the deposit consists of Cambrian to Ordovician calcareous sedimentary rocks and the Cretaceous Eopyeong granitoids. The skarns at Geodo occur around the Eopyeong granitoids, which consist, from early to late, of magnetite-bearing equigranular quartz monzodiorite, granodiorite, and dykes. These dykes emanated randomly from equigranular granodiorite and some of dykes spatially accompany skarns. Skarn Fe mineralization, referred as Prospect I and II in this study, is newly discovered beyond previously known skarns adjacent to the quartz monzodiorite. These discoveries show a vertical and lateral variation of skarn facies, grading from massive reddish-brown garnet-quartz in a lower and proximal zone to banded in an upper and distal zone, reflecting changes in lithofacies of the host rocks. Skarn veins in distal locations are parallel to sedimentary laminae, suggesting that lithologic control is important although proximal skarn has totally obliterated primary structures, due to intense retrograde alteration. Skarns at Geodo are systematically zoned relative to the causative dykes. Skarn zonation comprises proximal garnet, distal pyroxene, and vesuvianite (only in Prospect I) at the contact between skarn and marble. Retrograde alteration is intensely developed adjacent to the contact with dykes and occurs as modification of the pre-existing assemblages and progressive destruction such as brecciation of the prograde assemblages. The retrograde alteration assemblages consist predominantly of epidote, K-feldspar, amphibole, chlorite, and calcite. Most of the magnetite (the main ore mineral), replaces calc-silicate minerals such as garnet in the lower proximal exoskarn, whereas it occurs massive in distal pyroxene and amphibole in the upper and distal exoskarn. The emanation of dykes from the equigranular granodiorite has provided channelways for ascent of skarn-forming fluids from a deep source, whereas the style and nature of skarns suggest that originally structurally-controlled skarn-forming fluids may migrate long distances laterally to produce skarn in calcareous sedimentary rocks.

지역 및 도시개발의 문제와 대책 : 도시정주체계와 도시경제문제 ( Urban Hierarchy and Its Economic Problems )

김의준 대한건축학회 1993 建築 Vol.37 No.7

우리나라의 도시정주체계의 변화는 정부의 비공간적 개발전략이 투영되는 과정이다. 특히 생산요소의 공간적인 집적을 통한 효율성의 추구는 일부 대도시 및 제조업 특화도시를 발전시켰으나, 결과적으로 대도시와 중소도시, 도시와 농촌 등의 서로 다른 공간개체간의 왜곡된 개발양식을 창출하였다. 물론 1960년대의 경공업 중심의 수출전략과 1970년대의 중화학 공업육성을 통한 수입대체 발전전략은 도시의 경제적 성숙도를 더하였으나. 일부 대도시의 급속한 성장은 도시기능을 올바르게 수행하지 못할 뿐만 아니라 지방중소도시의 성장잠재력을 제대로 활용하지 못하고 오히려 중소도시의 인력유출에 따른 경제성장기반을 위축시키게 되었다.

스토리 창작 교육에 있어 캐릭터 구축을 위한 실습 프로그램 개발 연구

김의준 한국예술교육학회 2023 예술교육연구 Vol.21 No.3

In story creation, characters, along with plots, have traditionally been emphasized in their importance. Therefore, the theory of character setting is dealt with as a major part in most writing books. Even in story creation education, learning about the theory that composes a character along with the plot and its practice occupy an important portion. In order to develop the character build- ing ability required for story creation, it is necessary to first learn the main theories required for character setting and practice each theory. However, there are no studies or explanations on the in- terrelationships of the separate personality theories acquired in the individually conducted educa- tional process, and there are not many cases of integrating them into practice programs and applying them to the educational process. The theories required for character building can be largely divided into two categories. These are the theories about the type of character and the theory about the character's journey (arc). The main theories that explain the type of character include the Enneagram, MBTI, and TIPI. Regarding the character's inner journey, there is the Character Arc Theory, which explains the change of the character with positive arc, negative arc, and flat arc. However, these major theories have a problem in that they are individually applied in a state where the interrelationship is not clearly identified. Even in the case of ‘LIE’, the main concept of character arc, it is inevitably influenced by the type of character, but due to the absence of a con- cept that comprehensively explains it, creators are experiencing various confusions in the actual cre- ation process. Individually applied theories like this can hinder the unity in character composition of characters, which can act as an obstacle for each character to express their personality. Therefore, this study revealed the theories necessary for character construction and the interrelationships be- tween the theories, focusing on the value concept of the controlling idea, and applied it to practice in the form of a personality table to develop an integrated practice program for character con- struction and check its effectiveness

Fe-Mn 합금철내 질소의 용해 거동에 관한 연구

김의준,박종진,유병돈 대한금속재료학회 ( 구 대한금속학회 ) 1998 대한금속재료학회 학술대회 개요집 Vol.1998 No.0

가시광선 활용을 위한 Ag 도핑 흑색 ZnO 나노 광촉매 합성

김의준,이승효 한국표면공학회 2023 한국표면공학회 학술발표회 초록집 Vol.2023 No.5

젠트리피케이션 들여다보기

김의준 국토연구원 2019 국토 : planning and policy Vol.449 No.-

기술정보 : 에티오피아 금-희유금속(Ta-Nb-Li)광물자원의 부존현황

김의준 한국광물학회 2014 광물과산업 Vol.27 No.-

기술정보 : 세계 탄탈륨의 부존특성과 광화작용

김의준,문동혁 한국광물학회 2013 광물과산업 Vol.26 No.-

에티오피아 남부 켄티차 페그마타이트의 분화양상과 희유원소 광화작용

김의준,김수영,문동혁,고상모,Kim, Eui-Jun,Kim, Soo-Young,Moon, Dong-Hyeok,Koh, Sang-Mo 대한자원환경지질학회 2013 자원환경지질 Vol.46 No.5

켄티차(Kenticha) 희유원소(Ta-Li-Nb-Be) 광화대는 에티오피아 남부의 오피올라이트 습곡-쓰러스트 복합체내에 위치하고 있으며, 1980년대 에티오피아-구소련간 수행된 공동탐사 프로그램을 통해서 처음 발견되었다. 켄티차 희유원소 광화대는 남쪽에서 북쪽으로 덜미다마(Dermidama), 킬킬리(Kilkele), 슈니힐(Shuni Hill), 켄티차, 부포(Bupo) 페그마타이트를 포함한다. 켄티차 페그마타이트는 남북방향의 사문암과 활석-녹니석 편암층을 평행하게 관입하고 있으며, 대략 연장 2 km, 폭 400-700 m로 노출되어 있다. 켄티차 페그마타이트는 내부적으로 대상(zoning)을 이루고 있으며, 광물조합에 따라 하부 석영-백운모-조장석 화강암, 중부 백운모-석영-조장석-미사장석 페그마타이트, 상부 스포듀민-석영-조장석 페그마타이트로 세분된다. 주성분, 미량성분(Rb, Li, Nb, Ta, Ga), 원소비(K/Rb, Nb/Ta, Mg/Li, Al/Ga)는 페그마타이트의 분별작용과 고화작용이 하부에서 상부 페그마타이트로 진행되었음을 시사한다. 반면에 일반적인 페그마타이트 멜트의 분화양상과 달리 켄티차 페그마타이트의 Mg/Li 비는 상부 페그마타이트로 가면서 증가하는 양상을 보인다. 이러한 양상은 후기 마그마성 열수변질 또는 상부 초염기성암과의 반응 결과로 해석된다. 켄티차 페그마타이트의 희유원소 광화작용은 상부 페그마타이트에 집중되며, 최대 $Li_2O$ 3.0%, Rb 3,780 pm, Cs 111 ppm, Ta 1,320 ppm, and Nb 332 ppm을 함유하고 있다. 켄티차 페그마타이트에서 광석광물은 주로 탄탈라이트, 스포듀민, 레피돌라이트가 산출되며, 탄탈라이트는 거정의 석영-스포듀민과 상대적으로 세립의 당상 조장석과 함께 산출된다. 탄탈라이트는 $Mn^*$과 $Ta^*$ 값에 근거할 때 Mn-탄탈라이트로 분류된다. 거정질과 세립의 탄탈라이트는 조성($Mn^*$, $Ta^*$, Nb/Ta) 차이가 명확히 나타나며, 거정질 탄탈라이트는 세립의 탄탈라이트에 비해 Ta이 강하게 부화되며 Nb은 결핍되어 있다. 결론적으로 켄티차 페그마타이트에서 희유원소 광화작용은 마그마 멜트의 분별작용 최후기에 형성되었다. The Kenticha rare-element (Ta-Li-Nb-Be) mineralized zone is located in ophiolitic fold and thrust complex of southern Ethiopia and was firstly discovered by joint exploration program of Ethiopia-Soviet in 1980s. It includes Dermidama, Kilkele, Shuni Hill, Kenticha, and Bupo pegmatites from south to north. The Kenticha pegmatite intruded parallel to NS-striking serpentinite and talc-chlorite schist, and is exposed approximately 2 km length and 400-700 m width. The Kenticha pegmatite is internally zoned and subdivided into lower quartz-muscovite-albite granite, intermediate muscovite-quartz-albite-microcline pegmatite, and upper spodumene-quartz-albite pegmatite, based on their mineral assemblage. The major, trace elements (e.g., Rb, Li, Nb, Ta, and Ga), and element ratios (e.g., K/Rb, Nb/Ta, Mg/Li, and Al/Ga) suggest that the fractionation and solidification of pegmatite have progressed from the lower towards upper pegmatite. In contrast, unlike general magmatic fractionation, Mg/Li ratios of the Kenticha pegmatite tend to be increased towards the upper pegmatite. It may result from post-magmatic hydrothermal alteration and/or interaction with upper ultramafic rock. Rare-element mineralization in Kenticha pegmatite concentrates on the upper pegmatite, which contains up to 3.0 wt % $Li_2O$, 3,780 ppm Rb, 111 ppm Cs, 1,320 ppm Ta, and 332 ppm Nb. Ore minerals in Kenticha pegmatite mostly include tantalite, spodumene, and lepidolite, and tantalite has an association with coarser quartz-spodumene and relatively fine sacchroidal albite. The tantalite is classified into Mn-tantalite as a function of $Mn^*[Mn/(Mn+Fe)]$ and $Ta^*[Ta/(Ta+Nb)]$ values. Its compositions ($Mn^*$, $Ta^*$, and Nb/Ta) between coarse and fine tantalites are different and the former is strongly enriched in Ta and depleted in Nb compared to latter one. In conclusion, rare-element mineralization in the Kenticha pegmatite may has occurred in the latest stage of magmatic fractionation.