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임재혁(Jae Hyuk Lim),한만희(Man-Hee Han),이준연(Jun-Youn Lee),박정순(Jeong Soon Park),엄윤용(Youn Young Earmme),임세영(Seyoung Im) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Prediction of warpage and residual stress in semiconductor chip devices play an important role in chip design. However, there are a few uncertainties in warpage prediction due to unknown patterning material properties, and moisture effect on polymer film. To estimate patterning material properties, we adopt a composite plate analysis and experimental techniques. and measure the warpage of chip after drying at about 250℃ for 30min to remove moisture. In 100㎛, 80㎛ chip cases, finite element analysis result shows a good agreement with measured values, but for 50㎛ and 60㎛ chip cases, there exist a substantial deviation from the measured values due to local deformation from imperfection and defects inherently embedded in the patterning layer and nonuniform bonding between PIcoating and silicon.
임재한(Lim, Jae-Han),송승영(Song, Seung-Yeong),구보경(Koo, Bo-Kyoung) 한국건축친환경설비학회 2011 한국건축친환경설비학회 논문집 Vol.5 No.4
Recently the radiant panel heating and cooling system has been regarded as an alternative of low temperature heating and high temperature cooling by applying the renewable energy sources to the heating and cooling of buildings. Especially this system can be used as HVAC system alternatives in super high-rise buildings for energy saving and thermal comfort. Also it can be possible to reduce the plenum space because the minimum ventilation air will be supplied into the space. This study aimed at evaluating the basic characteristics of thermal output in light-weight radiant wall panel heating system. For this purpose, the thermal output of several light-weight radiant wall panel types were analysed by 3D dynamic heat transfer simulation. According to the supply water temperature, composition of panel layers and panel dimension, the thermal output characteristics such as surface temperature distribution, temperature difference between supply and return water were analyzed. The results show that we should improve the heat storage performance of wall panel for better distribution of surface temperature and thermal comfort.
6가 크롬 처리를 위한 알루미늄 산화물을 함유한 재생 분말 폐기물의 적용
임재우(Jae Woo Lim),김태환(Tae Hwan Kim),강형식(Hyung Sik Kang),김도선(Do Son Kim),김한선(Han Seon Kim),조석희(Seok Hee Cho),양재규(Jae Kyu Yang),장윤영(Yoon Young Chang) 大韓環境工學會 2009 대한환경공학회지 Vol.31 No.3
본 연구에서는 알루미늄 산화물을 함유한 재생 분말 폐기물에 의한 Cr(VI)의 제거특성을 조사하였다. 가공하지 않은 폐기물의 유기물을 제거하기 위해 550℃에서 소성하여 재생 분말 폐기물(RPW)을 준비하였다. 수용액 상에서 Cr(VI)의 흡착 경향에 관한 연구를 위해 회분식 반응장치를 이용하여 pH 변화, 흡착 속도, 등온 흡착 실험을 4가지 다른 이온세기 화학종(NO₃-, CO₃<sup>2-</sup>, SO₄<sup>2-</sup>, PO₄(3-))의 존재 하에서 수행하였다. SO₄<sup>2-</sup>와 PO₄(3-)가 존재할 때는 전체 pH 범위에서 크롬의 흡착이 크게 감소하였다. 반면 NO₃-와 CO₃<sup>2-</sup>에 의한 흡착 방해의 영향은 SO₄<sup>2-</sup>와 PO₄(3-)에 의한 것보다 상대적으로 낮았다. NO₃-와 CO₃<sup>2-</sup>의 존재 하에 Cr(VI) 흡착은 pH 4.5에서 최대로 나타났다. 이온세기 화학종의 농도가 증가함에 따라 Cr(VI)의 흡착은 감소하였다. 이러한 결과를 토대로 할 때 RPW와 Cr(VI) 사이의 흡착은 외부배위권 착물을 통하여 발생되는 것으로 사료된다. RPW에 의한 Cr(VI)의 흡착은 2차 반응으로 잘 표현되었다. Langmuir 등온흡착식을 이용하여 pH 3에서 RPW에 의한 Cr(VI)의 최대 흡착량을 구한결과 NO₃-, CO₃<sup>2-</sup>, SO₄<sup>2-</sup>, PO₄(3-)가 이온세기 화학종으로 있을 때 각각 11.1, 10, 3.33, 5 mg/g으로 얻어졌다. In this research, the removal capacity of Cr(VI) by the reused powdered wastes (RPW) containing aluminium oxides was studied. As a pre-treatment process for the preparation of calcined wastes, calcination was conducted at 550℃ to remove organic fraction in the raw wastes. In order to study the adsorption trend of Cr(VI) ions from aqueous solutions, the pH-edge adsorption, adsorption kinetic and adsorption isotherm were investigated using a batch reactor in the presence of four different background electrolytes(NO₃-, CO₃<sup>2-</sup>, SO₄<sup>2-</sup>, PO₄(3-)). Cr(VI) adsorption was greatly reduced in the presence of SO₄<sup>2-</sup> and PO₄(3-) over the entire pH range. Meanwhile the inhibition effect by NO₃- and CO₃<sup>2-</sup> was relatively lower than that by SO₄<sup>2-</sup> and PO₄(3-). Cr(VI) adsorption was maximum around pH 4.5 in the presence of NO₃- and CO₃<sup>2-</sup>. As the concentration of background electrolytes increased, Cr(VI) adsorption decreased. This result mightly suggests that adsorption between the surface of RPW and Cr(VI) occurs through outer-sphere complex. Cr(VI) adsorption onto the RPW was well described by second-order kinetics. From the Langmuir isotherm at initial pH 3, the maximum adsorbed amount of Cr(VI) onto the RPW was 11.1, 10, 3.3, 5 mg/g in the presence of NO₃-, CO₃<sup>2-</sup>, SO₄<sup>2-</sup>, and PO₄(3-), respectively.
거주자의 건물에너지 절약을 위한 건축물 에너지 소비량 정보 구축 및 활용 전략
임재한(Lim, Jae-Han),진혜선(Jin, Hye-Sun),최보혜(Choi, Bo-Hye),김성임(Kim, Sung-Im),송승영(Song, Seung-Yeong) 한국건축친환경설비학회 2015 한국건축친환경설비학회 논문집 Vol.9 No.2
The purpose of this paper is to deduct the scheme of construction related to the building end-use energy consumption associated with domestic integrated management system for building energy by analyzing various building energy consumption statistics and database. Although building officials can be considered as a direct influencing factor to reduce building energy consumption, they are just given information related to the primary or total energy consumption like gas or electricity and it has been mainly used for national political purposes. In some countries, however, building energy consumption database or related statistics are given as a form of end-use energy units including space-heating, space-cooling, hot-water supply, ventilation, lighting etc. Furthermore, by constructing standard end-use energy database, real energy consumption could be compared with the standard one and building owners could be given some guidelines to reduce building energy. By doing this, we can take part in the building energy preservation spontaneously.
가돌리늄(Gd) 첨가에 따른 1A 등급 듀플렉스 스테인레스 강의 미세조직 및 파괴 특성 변화
임재한 ( Jae Han Lim ),정현도 ( Hyun Do Jung ),안지호 ( Ji Ho Ahn ),문병문 ( Byung Moon Moon ) 한국주조공학회 2016 한국주조공학회지 Vol.36 No.1
CD4MCU duplex stainless steel with gadolinium was fabricated as a neutron absorbing material by the air induction melting method. The gadolinium formed intermetallic compounds of Cu-Gd-Fe. There were no significant differences in hardness or ultimate tensile strength between experimental alloys. With the addition of gadolinium the yield strength of the cast alloy significantly increased, from 478.8 ± 11.6 to 514.2 ± 29.9 MPa, whereas elongation of the cast alloy decreased with the addition of gadolinium, from 26.0 ± 7.1 to 7.0 ± 2.5% due to the formation of gadolinium based intermetallic compounds.