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연구논문 : 그린 ICT 정책의 문제점 및 개선방향에 대한 연구
김현경 ( Hyeon Kyeong Kim ),김승도 ( Seung Do Kim ),설성희 ( Sung Hee Seol ),김형준 ( Hyoung Jun Kim ),김용운 ( Yong Woon Kim ),임정일 ( Jeong Il Lim ) 한국환경정책학회 2010 環境政策 Vol.18 No.2
Recently, climate change has emerged as one of the biggest challenges that mankind should cope with. Many efforts to mitigate climate change have been made across nations, international organization, industries and individuals. Information and communication technologies(ICTs) have drawn attention because of their high potential application to mitigate and monitor the climate change. Many industrialized countries and industries have introduced green ICT strategies to tackle climate change problems. Korean government has also tried to pursue green ICT strategies in various perspectives. In this paper,we examine green ICT strategies in Korea and propose some directions for efficient and comprehensive green ICT strategies based on the analysis. While Korea has world-class ICT manufacturing industries and outstanding ICT infrastructure, ICT services industries are weak. Low utilization of ICT in business leads to poor productivity, and besides, this prevents the expansion of green ICT into whole economy and society. Another problem is that the green ICT strategies are sometimes overlapped and inconsistent since they are independently established in various government departments. Strong leadership is needed to establish and carry out consistent and efficient green ICT strategies. In addition, implementation of reliable national GHG inventory and increasing ICT application through the activation of ICT services industries are urgently needed.
종이/페놀수지가 주성분인 동박적층판(Copper Clad Laminate)의 열분해 특성
송재헌(Jae Hun Song),김승도(Seung Do Kim),안현철(Hyun Cheol Ahn),김경수(Gyung Soo Kim),김상범(Sang Bum Kim),정재성(Jae Sung Jung),공성호(Sung Ho Gong),조영개(Young Gae Cho) 大韓環境工學會 2007 대한환경공학회지 Vol.29 No.9
본 논문의 목적은 최근 발생량이 급속히 증가하고 있으나, 적절한 처리방법이 없는 인쇄회로기판의 원자재인 페놀수지 동박적층판(Phenol Copper Clad Laminate, 이하 p-CCL)의 재활용을 위해 열분해 적용 가능성을 조사하는데 있다. 동역학 특성은 열중량분석기(Thermogravimetric Analyzer, 이하 TGA)를 사용하였다. 또한 280, 350, 600℃의 온도에서 생성된 액체와 고체부산물에 대해서는 원소분석, 공업분석, 발열량 등의 일반적인 특성을 분석하였고, 액체부산물은 GC/MS, FT-IR를 이용하여 구성 성분을 분석하였다. TGA 결과에 의하면 p-CCL의 분해는 세 단계에 걸쳐 일어났다. 첫 번째는 280℃ 이하의 저온 분해구간, 280∼350℃의 중온분해구간, 350℃ 이상의 고온 분해구간으로 구분할 수 있다. 저온, 중온에서의 액체부산물의 주요 성분은 수분과 페놀인 반면에 고온에서는 가지가 있는 페놀류와 퓨란류로 나타났다. 반응온도가 높아짐에 따라 휘발성분의 양은 감소하는 반면 고정탄소의 함량은 증가하였다. 고체부산물의 고위 발열량은 7,400∼7,600 kcal/kg으로 연료로서의 활용 가능성이 있다고 여겨진다. 또한 고체부산물의 고정탄소 함량이 높고, 회분 성분 함량이 낮기 때문에 적절한 개질화 과정을 거친다면 흡착제로서도 활용 가능하다고 판단된다. Electronic wastes have increased tremendously. However, any reliable treatment methodologies have rarely been established. Electronic wastes have posed serious disposal problem due to their physico-chemical stability. This paper investigated the application possibility of pyrolysis for the purpose of recycling the p-CCL(phenol based Copper Clad Laminate). Thermogravimetric analysis(TGA) was used to investigate the thermal decomposition pattern of p-CCL. We elucidated the characteristics of pyrolysis by-products at operating temperatures of 280, 350 and 600℃. GC/MS and FT-IR were used to characterize the liquid by-products along with general characterization methods such as Ultimate Analysis, Proximate Analysis and Heating Value, whereas general characterization methods were only introduced for the solid by-products. At a heating rate of 5℃/min, TGA curves exhibited three decomposition stages: (1) low-temperature decomposition region(<280℃), (2) medium temperature region(280∼350℃) and (3) high-temperature region(>350℃). The major compounds of liquid by-products at low- and medium-temperatures were accounted for by water and phenol, whereas branched phenols and furans were major compounds at high-temperatures. As the temperature increases, volatile quantities decreased but the fixed carbon increased. High heating values of solid by-products(7,400∼7,600 kcal/kg) would suggest that the solid by-products could be applicable as fuel. In addition, high fixed carbon but low ash content of the solid by-products offered an implication that they are capable of being upgradable for adsorbent after applying appropriate activating process.
발파하중 및 비석의 충격에 의한 광주의 지반진동의 예측 연구
이상곤 ( Sang Gon Lee ),강추원 ( Choo Won Kang ),장호민 ( Ho Min Chang ),류복현 ( Pog Hyun Ryu ),김장원 ( Jang Won Kim ),송하림 ( Ha Rim Song ),김승은 ( Seung Eun Kim ) 대한화약발파공학회 2010 화약발파 Vol.28 No.1
채광을 위한 발파작업 시 발파진동 및 비석에 의한 광주의 피로현상에 의해 주변에 위치한 광주의 변형 및 파괴가 발생될 수 있으며, 이로 인해 채굴공동의 붕락현상이 발생되기도 한다. 본 연구는 대규모 갱내 채굴공동의 효율적인 안정성 유지를 위해, 갱도 굴착에 따른 발파 작업 시 비산과의 충돌에 의한 광주의 역학적 특성을 파악하기 위한 것으로써 발파로 인한 광주와 비석의 충돌 시 광주 주변의 지반진동을 비교하였다. 이에 비석의 파쇄입도분석을 실시하였으며, 경험식에 의한 충격진동과 실제 데이터의 회귀분석에 의한 지반진동을 비교하였다. 또한 이것을 수치해석에 의해 분석된 결과와도 비교하였다. In blasting for lighting, fatigue behaviors of pillars such as destruction and deformation may occur due to blasting vibration and flyrock, which may cause collapses of cavities. This study aims to identify dynamic behavior of pillars to maintain efficient safety of cavities in large drafts. when they collide with flyrocks under blasting for the excavation. For the purpose, we compared ground vibration around pillar when flyrock collided with the pillar and that when explosive blast happened for the excavation. we conducted fragmentation analysis of the flyrock and compared impact vibration obtained from empirical equation with ground vibration obtained from regression analysis of real vibration data. also we compared those with results analyzed from numerical analysis.
위장병(胃腸病) 환자(患者)에서 적외선체열진단기(赤外線體熱診斷器)의 활용(活用)
고창남,김승은,이상욱,김도형,윤성우,Ko, Chang-Nam,Kim, Seung-Eun,Lee, Sang-Uk,Kim, Do-Hyung,Yoon, Seong-Woo 대한한방내과학회 2001 大韓韓方內科學會誌 Vol.22 No.4
Objective : Cold hypersensitivity is excessive sensitivity of each body part. particularly limbs and low backs, but sometimes it affects upper abdomen region in G-I trouble patients. Methods : We conducted this research on 69 patients who came and took the both exam of gastroscopy and D.I.T.I. in kangnam korean hospital kyung hee university. So, we researched the significance of temperature deviations on upper abdomen which was studied separately by gastritis group, digestive function group and H. pylori group. Results and Conclusion : The temperature deviation of Zhongwan(Ren12)-Danzhong(Ren17) of gastritis group and indigestive patients was significant, it means that patients who have severe gastritis and indigestion have more significant cold hypersensitivity in upper abdomen. The temperature deviation of Zhongwan(Ren12)-Danzhong(Ren17) of H.pylori positive patients in H.pylori group was not significant. The clinical relationship or tendency was not found both between H.pylori group and gastritis group and between H.pylori group and digestive function group.