"일본광업회 추계대회참가기"

오재현 대한금속재료학회(대한금속학회) 1968 대한금속·재료학회지 Vol.6 No.3

우리나라 자원(資源)리싸이클링의 현황(現況)과 과제(課題)

오재현,Jae-Hyun, Oh 한국자원리싸이클링학회 2000 資源 리싸이클링 Vol.9 No.1

In order to prospect current recycling status in Korea, wastes generation and recycling rate were reviewed. Approximately 188,600 ton/day of wastes was generated in 1998; 44,600 ton/day of domestic waste and 144,000 ton/day of industrial waste. During the last five years, waste management laws such as recycling law and environment friendly industry law were prepared. In this article, concerning over waste generation and recycling, the problems and technological developments associated with recycling were summarized.

자동차 리싸이클링의 현황과 과제

오재현 한국자원리싸이클링학회 2001 資源 리싸이클링 Vol.10 No.3

The Korean Auto industry has developed remarkably over the past 30 years. In 2000 alone, Korea produced 3.11 million vehicles, and the number of vehicles registered surpassed the ten million mark. As the number of vehicles registered in Korea has increased, yew after you, a rising number of cars have been scrapped. In 2000, a total of 455,592 automobiles were scrapped, up dramatically from only 101,158 in 1989. The system for handling of ELV(End-of-Life Vehicles) in Korea is governed by the "Motor Vehicle Control Act". The Act places the responsibility for vehicle scrapping directly on the vehicle owners. h vehicle owner can only can eel a vehicle registration after he gets a certificate from an authorized vehicle dismantler showing that his vehicle was properly scrapped according to the law. The take-back rate of ELV reaches nearly 100% in Korea. The vehicle scrapping process in Korea is very similar to those in other countries. fluids such as fuels and oils are first removed, and recyclable parts are collected and separated. Engines and transmissions are dismantled and recycled for use as raw material. Plastics, which are not easily reused, are generally treated as industrial wastes. The "Motor Vehicle Control Act" prohibits reuse of certain parts in order to guarantee the safety of the used auto parts. However, some restrictions on the reuse of auto parts have recently been eased to promote recycling. In this paper, additionally, car recycling policy of the foreign countries such as Japan, Germany and EU were reviewed.

수열합성법으로 PES 기판에 성장된 Mg-doped ZnO 나노막대의 구조 및 전기적 특성에 관한 연구

오재현,박세현,장낙원,김홍승 한국물리학회 2017 새물리 Vol.67 No.9

For the fabrication of a wearable flexible ultraviolet photodetector device, Mg-doped ZnO was studied. MgZnO nanorods were grown using the hydrothermal synthesis method, which can grow MgZnO at low temperature on a polyether sulfone (PES) substrate. The MgZnO nanorods showed a crystal structure in which hexagonal MgZnO and cubic MgZnO were mixed as Mg was doped. The MgZnO nanorods doped with 3 at% Mg showed the best crystallinity, and the sheet resistance value was 76 $\Omega/$□. An ultraviolet (UV) photodetector fabricated using the MgZnO nanorods had a maximum current of 1.9 $\mu$A at a 1 V applied voltage in a UV irradiation environment, a rise time of 21 seconds, a decay time of 17 seconds, and an on/off current ratio value of 1.96 $\times$ 10$^2$. 인체에 부착할 수 있는 유연 자외선 광검출기 소자를 제작하기 위하여 ZnO에 Mg를 도핑한 MgZnO에 대한 연구를 수행하였다. 유연한 소자를 제작하기위해 PES (polyether sulfone) 기판을 사용하였으며 저온에서 MgZnO의 성장이 가능한 수열합성법을 이용하여 MgZnO 나노막대를 성장시켰다. MgZnO 나노막대는 Mg가 도핑됨에 따라 육방정계 MgZnO와 입방정계 MgZnO가 혼재해 있는 결정 구조를 보였다. Mg이 3 at% 도핑된 MgZnO 나노막대가 결정성이 가장 우수하였고 면저항값은 76 $\Omega/$□로 나타났다. MgZnO 나노막대를 이용하여 제작된 자외선 광검출기는 UV 조사 환경에서 1 V 인가전압에서 최대 전류는 1.9 $\mu$A이고, 상승 시간은 21초, 감쇠 시간은 17초, on/off 전류비 값은 1.96 $\times$ 10$^2$로 측정되었다.

고령토로부터 알루미나의 추출 (제1보)

오재현,이원해,백운형 대한금속재료학회(대한금속학회) 1973 대한금속·재료학회지 Vol.11 No.1

우리나라에 상당량 매장되었고 약 33%의 알루미나를 함유하고 있는 고령토로부터 황산을 용매로하여 알루미나 추출의 기초실험을 행하였다. 즉 추출온도, 황산농도, 교반속도, 추출시간을 변화시켜서 실험을 하였으며 또 고령토를 여러 온도에서 배소하여 추출실험을 하였다. 일반적으로 고령토를 배소함으로서 추출율이 증가하였고 700℃에서의 배소산물이 가장 좋은 추출율을 보여 주었다. 그러나 1,000℃에서 배소한 고령토로부터 알루미나의 추출은 거의 볼 수 없었으며 결정구조의 변화와 추출율의 관련성을 약간 검토하였다.

Small Cell Lung Cancer transformation of Non-Small Cell Lung Cancer during Pembrolizumab

오재현,장형욱,김은영,이상훈 대한내과학회 2020 대한내과학회 추계학술대회 Vol.2020 No.1

자원리싸이클링의 현황과 전망

오재현,김성돈,김준수,Oh Jae-Hyun,Kim Sung-Don,Kim Joon-Soo 한국자원리싸이클링학회 2003 資源 리싸이클링 Vol.12 No.5

In order to prospect current recycling status in Korea, legislative system and policies relating to recycling, wastes generation and recycling rate were reviewed. Approximately 260,400 ton/day of wastes was generated in 2001. 48,400 ton/day of household waste and 212,000 ton/day of industrial waste. During the last ten years, waste management laws such as waste disposal law, recycling law and environment friendly industry law were prepared. In this article, concerning over waste generation and recycling, recycling law, Extended Producer Responsibility System and the problems and technological developments associated with recycling were summarized.

제강(E.A.F.) 더스트리싸이클링에 있어서 대만과 한국

오재현,Oh Jae Elyun 한국자원리싸이클링학회 2003 資源 리싸이클링 Vol.12 No.1

폐암에 의한 맥락막 전이암 1예

오재현,고상준,양연식,최창욱 대한안과학회 2017 대한안과학회지 Vol.58 No.1

목적: 과거병력이 없었던 젊은 여자에서의 폐암에 의한 맥락막 전이암 1예를 보고하고자 한다. 증례요약: 31세 여자가 내원 일주일 전부터 시작된 시력저하를 주소로 외래에 내원하였다. 안저검사에서 좌안에 시신경유두 상이측에 융기된 황백색의 맥락막종괴와 장액망막박리가 관찰되었다. 흉부 X-ray에서 비정형폐렴이나 혈행전이를 의심하였고 이에 추가적으로 유방 방사선 촬영, 흉부 및 복부 computed tomography, 척추 magnetic resonance imaging, 기관지경유 폐생검을 시행하였고 폐샘암종으로 진단되었다. 환자는 전신적 항암치료를 시작하였고 한 달 뒤 좌안 시력이 호전되었으며 망막하액과 종괴의 크기가 줄어들었다. 2개월 뒤에 종괴는 사라졌으며 이후에도 재발하지 않았다. 결론: 젊고 과거병력이 없던 여자 환자가 시력저하를 주소로 내원하여 맥락막 전이 소견을 보여 페암을 진단 받은 경우는 흔치 않으며 항암치료만으로 좋은 치료 결과를 얻었기에 보고하는 바이다. Purpose: To report a case of choroidal metastasis caused by lung cancer in a young female who had no history. Case summary: A 31-year-old female presented with decreased vision for 1 week. Fundus examination revealed an orange colored choroidal tumor and serous retinal detachment at superotemporal area of the optic disc on the left eye. On chest X-ray, atypical pneumonia or hematogenous metastasis was shown. Additionally, mammography, chest-abdomen computed tomography, lumbar magnetic resonance imaging, and transbronchial lung biopsy were performed and the patient was finally diagnosed with adenocarcinoma. The patient started systemic chemotherapy and visual acuity improved after 1 month. Tumor size and subretinal fluid also decreased. The tumor disappeared 2 months later and there was no recurrence. Conclusions: There are only few cases in which choroidal metastasis was observed in a young female patient with no history who had decreased visual acuity and was later diagnosed with lung cancer. Authors report this case because a satisfactory result was obtained from chemotherapy alone.

우리나라 골재산업의 현황

오재현,Oh, Jae-Hyun 한국자원리싸이클링학회 2016 資源 리싸이클링 Vol.25 No.4

To investigate the current status of aggregate industry in Korea, the law of aggregate gathering, the law of forest management, the aggregate statistics of demand and supply in recent years, and market price of aggregate were reviewed. It is conformed that the forest aggregate industry is developing year by year and leading the industry. In addition, in order to well understanding about aggregate industry, the production system and process of the Whaseong forest aggregate quarry were introduced. 우리나라 골재산업의 현황을 파악하기 위하여 골재채취법 및 산지관리법, 골재공급실적과 2016년도 골재원별 공급계획을 그리고 지역별 골재가격 동향을 조사하였다. 골재산업 중에서도 산림골재의 비중이 매년 신장하고 있으며, 산림골재가 골재산업을 주도하고 있다. 한편, 골재산업의 이해를 돕기 위해 우리나라 산림골재산업의 대표적 기업으로 매년 200 ~ 300만$m^3$의 품질 높은 골재를 수도권에 공급하고 있는 (주)삼표산업 화성사업소(화성석산)의 골재생산 프로세스를 기술하였다.