몽골 우기누르 철-망간 부존 지역의 3차원 지질모델과 자력탐사 결과의 비교분석

이정아,유재형,박계순,이범한,김인준,허철호,Lee, Jeong-a,Yu, Jaehyung,Park, Gyesoon,Lee, Bum han,Kim, In-Joon,Heo, Chul-Ho 대한자원환경지질학회 2015 자원환경지질 Vol.48 No.4

본 연구는 몽골 아르항가이 주 남동부 지역에 위치하는 우기누르 철-망간 광화대에 대해 3차원 지질모델을 구축하고 자력탐사와 비교 분석하여 지질 내 광체의 분포 특성을 유추하였다. 단면도 구축, Surface 모델링, 엽리 모델링 및 솔리드 모델링의 4단계로 3차원 지질모델을 구축한 결과, 연구지역 1과 2는 북서방향의 단층을 경계로 서부에는 문군체층이 동부에는 야실층이 분포하며 지질암체 내 표현된 엽리의 주된 주향 방향은 북서방향을 보이며 이러한 경향성은 지질경계를 이루는 북서방향 단층과의 유사하다. 연구지역의 자력탐사 자료를 이상치 분포특성에 따라 살펴본 결과, 자화율의 임계값이 낮을수록 이상치 분포대가 수직적인 분포를 보이는 경향이 관찰되나 임계값이 높아짐에 따라 이상대의 분포가 점차 지표 및 이와 인접한 천부에 집중된다. 자력탐사 이상대의 분포와 지질분포를 3차원 상에서 비교분석한 결과, 연구지역 1에서 자력탐사 이상대의 분포가 주로 북서방향 단층의 서부에 분포하는 문군체층에 신장된 형태의 렌즈상으로 분포하나, 연구지역 2의 경우 문군체층과 야실층에 균등한 분포를 보인다. 3차원 지질모델과 자력탐사 분포 특성을 비교분석 결과를 살펴보았을 때 본 연구지역에서는 실루리아기에 광화작용과 연관된 화산활동이 있었으며, 이 후 발생한 구조운동에 의해 광화대가 구조선을 따라 재배열 된 것으로 생각된다. This study constructed a 3D geological model for Uggi Nuur Fe-Mn mineralization zone in Mongolia, and the 3D geological distribution is cross-analyzed with magnetic anomaly distribution to figure out relationship between ore zone and subsurface geology. As a result of 4 step 3D modeling procedures including geological cross section, surface modeling, foliation modeling and solid modeling, the geology of the both study area is bordered by faults in NW direction with Munguntessj formation being located in the west side of the fault while Yashill formation is located on the other side of the fault. Moreover, the strike direction of foliation in the both formation shows same directional pattern with the NW faults. The magnetic anomaly distribution reveals that higher anomaly values are concentrated to near the ground surface. The analyses of 3 dimensional distribution between subsurface geology and magnetic anomaly indicates that higher anomaly is mainly distributed over the Munguntessj formation as a elongated lens bodies whereas the magnetic anomaly is evenly found in the both of Munguntessj formation and Yashill formation in the study area 2. It infers that volcanic activities associated mineralization occurred during silurian period, and the mineralized zone is thought to be realigned along the geological structures caused by later stage tectonic activities.

난 사람, 든 사람, 된 사람

이정아,Lee, Jeong-A 한국대학교육협의회 1998 大學敎育 Vol.93 No.-

현지견학을 다녀와서-녹색구매 실천단

이정아,Lee, Jeong-A 한국발포스티렌재활용협회 2006 환경사랑 Vol.46 No.-

여성민우회 생협 소속 녹색구매실천 단원들은 지난 10월 23일 경기도 양주시에 위치한 주원수지자원과 (주)하이우드를 방문하여 스티로폴이 회수 재활용되어 액자제품으로 생산되는 현장을 견학하였다.

Advanced single-visit tooth whitening: Case report

이정아,임지혜,손서진,양미영,장석우,유현미,박동성,오태석,Lee, Jeong-A,Im, Ji-Hye,Son, Seo-Jin,Yang, Mi-Yeong,Jang, Seok-U,Yu, Hyeon-Mi,Park, Dong-Seong,O, Tae-Seok 대한심미치과학회 2011 Journal of the Korean Academy of Esthetic Dentistr Vol.20 No.1

악골에서 발견된 multiple myeloma의 구강내 plasmacytoma 병소: 증례보고

이정아,박지영,윤성훈,박민규,김창현,박재억,Lee, Jeong-A,Park, Ji-Young,Yun, Sung-Hun,Park, Min-Kyu,Kim, Chang-Hyun,Park, Je-Uk 대한악안면성형재건외과학회 2007 Maxillofacial Plastic Reconstructive Surgery Vol.29 No.1

Plasma cell neoplasms are generally categorized into four groups; multiple myeloma(MM), solitary plasmacytoma of the bone(SPB), plasma cell leukemias, and extramedullary plasmacytomas(EMP). These tumors may be further described as localized or diffuse in presentation. Localized plasma cell neoplasms are rare occurrences and include solitary plasmacytomas of the skeletal system, which account for 2-5% of all plasma cell neoplasms and extramedullary plasmacytomas of the soft tissue, which account for approximately 3% of all such neoplasms. A plasmacytoma is defined as any discrete, most likely solitary mass of neoplastic plasma cells either in the bone marrow or in various soft tissue sites. Diffuse lesions include the other two groups, multiple myeloma and plasma cell leukemia. The relationship between these processes has not yet been definitively characterized, but there appears to be a continuum in which both SPB and EMP often progress to MM. The patient was referred who had continuous deep throbbing bone pain and swelling on the left posterior gingival area of the mandible after extraction of the first and second molar. The result of intraoperative excisional biopsy of the lesion was confirmed as a plasmacytoma. And it revealed systemic multiple myeloma through the further diagnostic work-up. It is worth to report because of a rare case of multiple myeloma found in oral cavity as a form of plasmacytoma.

MgO 및 TiO₂가 첨가된 알루미나의 치밀화와 입성장 거동

이정아,김정주,Lee, Jung-A,Kim, Jeong-Joo 한국세라믹학회 2002 한국세라믹학회지 Vol.39 No.11

Densification and grain growth behavior of MgO and .$TiO_2$-doped alumina ceramics were investigated. MgO was found to inhibit grain growth and to promote densification, but .$TiO_2$ acted to promote grain growth more than densification. The density which showed the maximum shrinkage rate was investigated in the plot of shrinkage rate versus density. The data suggests that the maximum shrinkage rate separates the two kinetic regimes, below the density of maximum shrinkage, the regime associated with densification and above the maxima, the regime associated with the grain growth. The plot exhibits a maximum which shifts to higher temperatures with MgO doping and to lower with .$TiO_2$ doping. 알루미나 세라믹스에 MgO와 $TiO_2$를 각각 단독으로 첨가했을 때의 치밀화와 소결 거동을 수축률-소결 밀도 관계를 통해 비교 조사하였다. MgO가 첨가되었을 때는 소결 전과정을 통해 입성장은 억제되고 치밀화는 촉진되었으나, $TiO_2$가 첨가되었을 때는 입성장은 촉진된 반면 치밀화는 떨어졌다. 또한 입자 크기, 밀도, 수축률등을 통해 수축률-소결 밀도 관계를 구하여 최대 수축률을 나타내는 밀도값(Density of Maximum Shrinkage Rate:${\rho}$J.S.R)을 조사해 보았다. 이때 최대 수축률을 나타내는 밀도값보다 낮은 밀도를 보이는 영역에서는 치밀화가 입성장보다 우세하게 진행되었으며 최대 수축률을 나타내는 밀도값보다 높은 밀도의 영역에서는 입성장이 보다 우세하게 진행되는 것으로 추정하였다. 이때 최대 수축률을 나타내는 밀도값은 $TiO_2$가 첨가된 알루미나 < 순수 알루미나 < MgO가 첨가된 알루미나의 순서로 높은 값을 보였다.

과학수업 참여에 따른 초등학생의 학습과 정체성의 변화 -계절의 변화 단원을 중심으로-

이정아 ( Jeong A Lee ) 한국초등과학교육학회 2016 초등과학교육 Vol.35 No.1

This study aimed to understand students` learning in elementary science classes in terms of participatory perspective. Participatory perspective is based on the participationist views on learning. Based on the participatory perspective, this study used two concepts of participationism: ‘the changes of learning on commognition’ of Sfard (2007) and ‘the identity’ of Wenger (1998/2007). Based on these concepts, four episodes of an elementary science class were analyzed. The results showed that students carried out their learning from objective-level learning to meta-level learning. And students defined who they are by identifying and negotiating scientific meaning during the learning. These results showed students become members of science community through their participations in science class.

과학수업담화 연구의 배경과 전개

이정아 ( Jeong A Lee ) 서울敎育大學校 初等敎育硏究所 2012 한국초등교육 Vol.23 No.4

이 연구는 과학수업담화연구의 배경과 전개를 탐색하는데 그 목적이 있다. 이를 위해서 과학수업담화에 영향을 미친 사회학, 언어학, 사회언어학, 심리학 분야에서의 담화분석연구들이 탐색되었다. 그리고 지금까지 진행되어온 과학수업담화연구들을 각 연구의 지향에 따라 유목화하여 제시하였다. 그 결과 과학수업담화연구는 의미형성 과정으로서 과학수업담화, 중재물로서 과학수업담화, 사회언어학적 관점에서의 과학수업담화, 과학 언어로서의 과학수업담화, 관계에 초점을 두는 과학수업담화의 다섯 가지로 유형화되었다. 이를 통해 과학수업담화 연구의 진행상황을 돌아보고 앞으로의 과학수업담화연구가 나아갈 방향을 제안하였다. This study aimed to investigate the backgrounds and developments of the science classroom discourse researches. For this, the discourse analysis researches in sociology, linguistics, sociolinguistics and psychology which affected on researches of science classroom discourse were investigated. And then the researches of science classroom discourse were categorized according to their orientations. The results showed five categories: science classroom discourse as a process of meaning making, science classroom discourse as a medium, science classroom discourse in terms of sociolinguistics, science classroom discourse as a science language, and science classroom discourse focused on relation. This trial provides an opportunity to reflect the progress of them and suggests the directions to step forward in science classroom discourse researches.

정신분열병 환자의 신경심리학적 특성 : 기억능력과 실행능력을 중심으로

이정아(Jeong Ah Lee),유희정(Hee Jung Yoo),김성윤(Seong Yoon Kim),강연욱(Yeon Wook Kang),김창윤(Chang Yoon Kim),한오수(Oh Su Han) 한국정신병리진단분류학회 1996 精神病理學 Vol.5 No.1

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우유내 잔류물질 검사방법인 TTC-2 법 및 Disk assay법의 비교시험

이정아 ( Jeong Ah Lee ),이은미 ( Eun Mi Lee ),이성해 ( Seong Hae Lee ),도재철 ( Jae Cheul Do ),박영구 ( Young Gu Park ) 한국동물위생학회 1999 한국동물위생학회지 (KOJVS) Vol.22 No.1

This test process on screening method for the detection of residual antibiotics in milk is simple, economic, sensitive to residual antibiotics and was given approval international organs. Thus, this study was carried out the comparison of Disk assay method and TTC-II method for sensitivity and minimum detectable range of antibiotics in raw milk. The results of this study was summarized as follows 1. The number of samples requested for treatment of mastitis was 198 samples. Comparison of analytical results among the methods of TTC- II, disk assay and Delvo SP was that TTC-II 37 samples(18.6%), Disk assay l25samples(63.1%), Delvo SP 130 samples(65.7%) reacted positively. Conformity rate of Delvo SP and Disk assay was 70%. 2. Detectable limits of disk assay method in some antibiotics were more sensitive than those of official method(0.05-0.0025ppm in the f3-lactams, lppm in two aminoglycoside, 0.2 ppm in one tetracycline, similar in one macrolide) 3. For sensitivity of residual sulfonamides TTC- II was much more sensitive than disk assay. Detectable limits of sulfamethazine and sulfadimethoxine were 30 to 50ppm levels. 4. The best medium preservation period is 1-2 days. 5. Concentration of brome cresol purple related to resistance for B stearothermophilus culture was 24ppm/ml. These results show that disk assay method for screening detection of antibiotics residuces in milk is worthy of use.