• 환경위생공학
• /
• 제23권3호
• /
• pp.39-46
• /
• 2008

In order to study the estimate of $CH_4$ emission factors in the municipal wastewater treatment plants, the active sludge process, 5-stage process, Denipho process, and SBR process were investigated. When active sludge process, 5-stage process, and Denipho process were used in wastewater treatment plant, the $CH_4$ emission factors were 2.88, 1.61, and 0.57 g-$CH_4/kg$-BOD, respectively. On the other hand, in the case of SBR process, it was 4.14 g-$CH_4/kg$-BOD. These results indicate that SBR process was effective for $CH_4$ emission in municipal wastewater treatment plants. Using the above processes, the methane emission factor and amount of waste water sludge were $4.78m^3/t$ and $12,204,506m^3/yr$, respectively. The remove of BOD was a range of $93.91{\sim}98.63%$.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
• /
• pp.721-723
• /
• 2005

We applied the Atmospheric Pressure Plasma (AP-plasma) to the MgO film to try to control the Aging-time on the PDP production-line. The MgO film surface and the discharge characteristics of AC-PDPs were investigated, using the plasma-treated MgO film. The Aging-time change can be achieved by treating the MgO film with plasma. This method can be adapted to the mass production-line.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2003년도 하계학술대회 논문집 B
• /
• pp.1365-1367
• /
• 2003

In this paper, element technologies such as soldering. arrangement and lamination processes for photovoltaic module manufacture were examined and described as main processes. Especially solder paste and temperature condition in soldering process, loss factor in arrangement process and process conditions in lamination process are investigated to minimize the electrical loss. As a results, temperature condition in soldering process was found to be critical to contact resistance of electrode and life-time. Productivity of the process decreases dramatically by physical damage during arrangement process. Pressure level and press condition of upper chamber in lamination process were important parameters for the reliability. According to the test result of photovoltaic module, electrical properties dropped about $5{\sim}25%$ after 5 years.

• 한국생물공학회:학술대회논문집
• /
• 한국생물공학회 2005년도 생물공학의 동향(XVI)
• /
• pp.431-432
• /
• 2005

• 지능정보연구
• /
• 제8권1호
• /
• pp.159-173
• /
• 2002

사출금형 공정계획이란 금형설계를 완료한 후에 설계된 금형을 경제적, 효율적으로 생산하기 위하여 수행하는 제조공정에 대한 계획이다. 이러한 공정계획은 전문가의 수작업에 의한 수립에 의한 문제, 전문가의 양성과 부족현상, CAD/CAM 시스템 보급 및 생산형태의 다품종소량화 현상에 의해 자동화가 필요하다. 본 연구에서는 사례기반추론(Case-Based Reasoning)을 이용하여 IIMPPS(Intelligent Injection Mold Process Planning System)라는 사출금형 공정계획시스템을 개발하였다. 사출금형 공정계획을 자동화하기 위해서 사례기반 추론을 사용한 이유는 사출금형이라는 제품은 금형의 종류와 구조 등에 따라 공정계획이 매우 다양하게 수립되지만, 성형품의 용도나 품명이 같은 경우에는 공정이 거의 유사하여, 과거에 수립된 공정계획이 새로운 금형의 공정 계획에 매우 유용하게 사용될 수 있기 때문이다. 그리고 본 연구에서는 IIMPPS의 타당성을 평가하기 위하여 전문가의 정성적인 평가와 공정계획의 정확도 평가를 수행하였다.

• 한국분말재료학회지
• /
• 제16권2호
• /
• pp.131-137
• /
• 2009

This paper deals with the effects of the surfactant and preplate process (sensitization and activation) on electroless copper plating on carbon nano-fiber (CNF). Ultrasonic irradiation was applied both during dispersion of CNF and during electroless plating containing preplate process. The dispersion of CNF and flatness of the plated copper film were discussed based on the changes in surfactant concentration and preplate process time. It was clearly shown that high concentration of surfactant and long time of preplate process could promote the agglomeration of CNF and uneven copper plating on CNF.

• 한국식품조리과학회지
• /
• 제10권2호
• /
• pp.138-141
• /
• 1994

Whole, peeled sweetpotatoes were subjected to four different processes: 15 min microwave heating followed by 15 min baking (1), 90 min baking (2), 15 min microwave heating (3), and 15 min boiling followed by 15 min microwave heating (4). Samples of green and cured roots were used in the study. Scanning electron photomicrographs revealed that cured roots contained larger numbers of starch granules in the parenchyma cells than green roots, most of them compounded. The starch in cooked green roots was gelatinized while for cured roots it was mostly hydrolyzed into dextrins and sugars. Starch in process (3) roots was mostly gelatinized while in process (1) and process (2) roots gelatinized starch appeared in little quantity, thus it was primarily converted to dextrins and sugars. The process (4) resulted in little conversion of starch. The process (1) product resulted in a similar product to the process (2) product.

• 한국공작기계학회:학술대회논문집
• /
• 한국공작기계학회 2005년도 춘계학술대회 논문집
• /
• pp.383-388
• /
• 2005

In this paper Research development about a micro metal forming manufacturing system has been developed. A micro forming system has been achieved in Japan and it's developed micro press is limited to single forming process. To coincide with the purpose to be more practical, research and development is necessary about the press which the multi forming process is possible. We set the development of the equipment including micro deep drawing, micro punching and micro restriking process to the goal. To achieve this goal, Research about micro forming process to be related to multi process forming must be preceded first. Material selection and analysis about micro forming process are accomplished in this paper. And the basis research to make actual system is accomplished.

• 공업화학
• /
• 제18권3호
• /
• pp.273-278
• /
• 2007

본 논문은 배연가스로부터 이산화탄소를 흡착 회수하기 위한 허니컴 흡착소자 및 공정에 관한 것이다. 세라믹섬유와 Na-X를 주원료로 제올라이트 종이를 제조하였다. 제올라이트 종이의 이산화탄소 흡착능을 향상시키기 위해서 $Li^+$, $Ca^{2+}$, $K^+$ 이온교환 및 추가적인 표면코팅을 실시하여 그 특성을 분석하였다. $Li^+$ 이온교환 방법은 이산화탄소 흡착능을 가장 많이 증가시켰지만 공정적용이 가능할 만큼의 흡착능 변화를 보이지 않았다. 반면 Na-X의 추가적인 표면코팅은 이산화탄소 흡착능을 증가시키는 효율적인 방법이었다. 제올라이트 종이를 성형하여 만든 허니컴형 흡착소자에 대한 이산화탄소 흡착파과 특성을 분석하였으며, 이의 결과로서 회전식 이산화탄소 흡착 농축공정의 적용 예를 보여주었다.

• 한국염색가공학회지
• /
• 제30권3호
• /
• pp.168-179
• /
• 2018

The modified surface of specialty carbon black(SCB) is one of the main technical factors for producing a uniform color and stable dispersion. In this work, the carboxylation or sulfonation process of SCB was used to improve the dispersive properties of hydrophilic solvents such as 1,6-hexanediol and propylene glycol monomethyl ether acetate(PGMEA). The results showed that the color strength of SCB DC2500G changed little with a range of 0.128~0.941(${\Delta}E$) compared to other SCB DC2500G material. In contrast, in the case of SCB EG410, there was a uniform color value with a range of 0.144~0.252(${\Delta}E$). Also, in our experiments, a modified SCB was confirmed by printing ink material as a melt coating paper. It may be possible that the SCB EG410 material can be advantageous as a gravure ink product. Finally, the modified SCB obtained from this research will have a large impact on the industry as a potential material for toners, paint, rubber, fillers, and other carbon black additives.