다양한 방법으로 제조된 CuO/CeO₂ 촉매에서의 벤젠의 연소반응

정원영,송영인,홍성수,Jung, Won Young,Song, Young In,Hong, Seong-Soo 한국청정기술학회 2013 청정기술 Vol.19 No.2

$CeO_2$에 담지된 구리산화물에서 벤젠의 촉매연소 반응에 대해 연구하였다. 담지된 구리산화물 촉매들은 볼밀법과 함침법으로 제조하였고, XRD, FT-IR, TEM 및 TPR에 의해 특성분석을 하였다. 볼밀법으로 제조된 CuO/$CeO_2$ 촉매는 높은 담지량에서도 잘 분산된 CuO를 얻었다. 볼밀법으로 제조된 CuO/$CeO_2$ 촉매는 함침법으로 제조된 촉매에 비해 높은 활성을 보여주었다. CuO의 담지량이 증가할수록 촉매 활성이 증가하였으며, 10 wt%로 담지된 촉매에서 가장 높은 활성을 나타내었다. 또한, 10 wt% CuO/$CeO_2$ 촉매에 소량의 $Fe_2O_3$와 CoO의 조촉매 첨가는 CuO의 분산도를 높여 반응활성을 증가시켰다. Catalytic combustion of benzene over $CeO_2$-supported copper oxides has been investigated. The supported copper oxides catalysts were prepared using ball mill method and characterized by XRD, FT-IR, TEM and TPR. In the CuO/$CeO_2$ catalysts prepared using ball mill method, highly dispersed copper oxide species were shown at high loading ratio. The CuO/$CeO_2$ prepared using ball mill method showed the higher activity than those prepared using impregnation method. The catalytic activity increased with an increase in the CuO loading ratio, 10 wt% loaded CuO/$CeO_2$ catalyst giving the highest activity. In addition, the promoting of 10 wt% loaded CuO/$CeO_2$ catalyst with $Fe_2O_3$ and CoO enhanced the dispersion of CuO and then increased the catalytic activity.

Characterization of Mechanical and Flammability Properties of Nonwoven Fabrics Containing Polyethylene Terephthalate and Polylactic Acid Hollow Fibers

정원영,안효진,도성준,임정남,임대영,최영옥,김기영,Jeong, Won Young,An, Hyo Jin,Doh, Song Jun,Im, Jung Nam,Lim, Dae Young,Choi, Yeong Og,Kim, Ki Young The Korean Fiber Society 2013 한국섬유공학회지 Vol.50 No.6

The purpose of this study is to develop a lightweight and environmentally friendly nonwoven fabric to substitute polyurethane (PU) foams in automotive interiors. Two types of hollow fibers-polyethylene terephthalate (PET) hollow fiber and polylactic acid (PLA) hollow fiber-and bicomponent binder fibers were used to manufacture the nonwoven fabrics for seat cushions by carding, needle punching, thermal bonding, and air through bonding processes. The ideal characteristics required for automotive seat cushions were evaluated, and the significant changes with the structural components were analyzed. The nonwoven fabrics showed better air permeability, compressional resilience, ball rebound resilience, and non-flammability in comparison with PU foams. The characteristics were affected by the manufacturing processes.

이더넷에서의 QoS 보장을 위한 대역제한에 관한 연구

정원영,박종수,김판기,이정희,이용석,Chung, Won-Young,Park, Jong-Su,Kim, Pan-Ki,Lee, Jung-Hee,Lee, Yong-Surk 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.2B

현재 광대역통합망(BcN: Broadband convergence Network)에 대한 연구가 계속 진행 중에 있으며, 망의 규모가 커짐에 따라 가입자에 대한 서비스 품질(QoS: Quality of Service) 관리는 더욱 중요해 지고 있다. 3계층에서 QoS를 관리하는 것은 메모리의 크기나 소비전력의 비중이 크기 때문에 2계층에서의 Qos 관리가 필요하게 되었다. 또한 BcN에서는 여러 사용자가 제한된 서비스 자원을 공유하므로 최선(Best-Effort)의 서비스를 지향하는 방식으로 발전되어 왔다. 그러나 현재는 가입자들이 최선의 서비스 보다는 비싼 요금을 내더라도 차별화 된 서비스를 요구하고 있다. 따라서 가입자를 구별할 수 있는 멀티서비스 스위치에서 각 가입자는 과금에 따라 다른 대역폭을 할당 받게 된다. 기존의 대역제한기(Rate Limiter)는 포트별로 대역을 제한하기 때문에 가입자별로 공평한 대역을 보장하기 어렵다. 하지만 본 논문에서 제안한 대역제한기는 가입자별로 대역을 제한하므로 모든 가입자가 스위치의 구조와는 상관없이 공평한 대역을 제공받게 된다. 또한 가입자는 과금에 따라 가입자별로 다른 대역폭을 할당받으며, 학습된 가입자의 수에 따라 이더넷 스위치의 상향 링크 대역폭에 맞추어 학습된 가입자의 대역폭이 같은 비율로 조정된다. 그러므로 이더넷 스위치의 최대성능을 유지하며 QoS도 효율적으로 관리해 준다. Recently, a study of BcN(Broadband convergence Network) is progressing continuously, and it is important to improve the quality of the service according to subscribers because a scale of network is about to be larger. It is more important to manage QoS(Quality of Service) of all subscribers in layer 2 than layer 3 network since managing it in layer 3 network cost both additional processes and large hardware. Moreover, QoS based on Best-Effort service has been developed because tots of subscribers should use limited resource in BcN. However, they want to be supplied with different service even though they pay more charge. Therefore, it is essential to assign the different bandwidth to subscribers depending on their level of charge. The method of current Rate Limiter limits the bandwidth of each port that does not offer fair service to subscribers. The Rate Limiter proposed in this paper limits bandwidth according to each subscriber. Therefore, subscribers can get fair service regardless of switch structure. This new Rate Limiter controls the bandwidth of subscribers according to the information of learning subscriber and manages maximum performance of Ethernet switch and QoS.

신설되는 대규모 비형식 환경교육 시설의 교육 프로그램 개발 절차

정원영(Won-Young Jung),이재영(Jae-Young Lee),이선경(Sun-Kyung Lee),조찬희(Chan-Hee Cho) 한국환경교육학회 2013 環境 敎育 Vol.26 No.3

For the last decade, a considerable number of informal environmental education facilities and institutions had been proposed and materialized in Korea. These valuable places were intended to provide all citizens with more exciting and experience-based learning opportunities, basically distinguished from formal, school environmental education. This study was aimed to device the process or preliminary model for developing an education program of informal environmental education institutions which are newly developed, intended for all age groups as life-long learning and relatively large scale in space and budget. The conceptual programming model was compared to and integrated with other education program development strategies which had been proposed in a variety of informal education contexts, and finally applied to the process for developing an education program of the National Ecological Institute. The results indicated that the proposed process seemed to be useful in constructing the whole frame for the education program and further effectively dealing with many kinds of possible problems and issues, especially for all levels of visiting groups, with different interest groups, and in the consideration of local contexts.

2-(5,6-디메톡시-1-인데닐 )에틸 아민의 합성

정원영(Won Young Jung),마은숙(Eun Sook Ma) 대한약학회 2003 약학회지 Vol.47 No.1

In order to search the new serotonin bioisoster, 2-(5,6-dimethoxy-1-indenyl)ethyl amine(1) was synthesized. 3,4- Dimethoxybenzaldehyde , as starting material, was condensed with masonic acid in the pre sense of pyridine and piperidine to form 3,4- dimethoxycinnamic acid(2). Compound 2 was performed catalytic hydrogenation with 17% Pd-C to give propanoic acid derivative 3, which was cyclized by Friedel-Crafts acylation to afford 5,6-dimethoxyindan-1-one(4). Compound 4 was reduced with NaBH4 in ethanol to obtain 1-indanol 5, and it was dehydrated to give 5,6-dimethoxy-1- indene(6). This compound was lithiate d with 2.5M n-butyllithium and reacted with 1,2-dibromoe thane to give 2- (5,6-dimethoxy-1-indenyl)ethyl bromide(7), and which was treated with anhydrous ammonia to synthesize compound 1.

자연사박물관의 전시에 반영된 환경교육 내용 요소 분석

정원영(Won-young Jung),박은지(Eun-Ji Park),이주연(Joo-Youn Lee),김찬종(Chan-Jong Kim),박지은(Ji-Eun Park) 한국환경교육학회 2009 環境 敎育 Vol.22 No.2

We assumed that natural history museums have rooms for functioning as institutions for the environmental education, especially in aspects of multi-disciplinary, informal education. So we set goals of this research as finding 1) how much environmental education contents are reflected in exhibits of natural history museums, and 2) what those characteristics in aspects of dimension, range, and topic are. First, we developed a framework for analyzing of environmental education contents. Second, we applied the framework to seven major natural history museums. As the result, environmental education contents are reflected by 69.1 % totally. Especially, the 'knowledge' dimension covered mostly, and among them the range of 'elements of Ecosystem' occupied more than other ranges. With inferring our results, we suggested that characteristics of natural history museums in environmental education are followed; spatial-temporal expansion of bio-diversity concept, visualizing impacts of human activity against nature.

이동질량을 가진 테더가 있는 인공위성의 수학적 모델 수립 및 동적거동 분석

정원영(Wonyoung Jung),정진태(Jintai Chung) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.4

다양한 방법으로 제조된 CuO/CeO₂ 촉매에서의 벤젠의 연소반응

정원영(Won Young Jung),송영인(Young In Song),홍성수(Seong-Soo Hong) 한국청정기술학회 2013 청정기술 Vol.19 No.2

CeO₂에 담지된 구리산화물에서 벤젠의 촉매연소 반응에 대해 연구하였다. 담지된 구리산화물 촉매들은 볼밀법과 함침법으로 제조하였고, XRD, FT-IR, TEM 및 TPR에 의해 특성분석을 하였다. 볼밀법으로 제조된 CuO/CeO₂ 촉매는 높은 담지량에서도 잘 분산된 CuO를 얻었다. 볼밀법으로 제조된 CuO/CeO₂ 촉매는 함침법으로 제조된 촉매에 비해 높은 활성을 보여주었다. CuO의 담지량이 증가할수록 촉매 활성이 증가하였으며, 10 wt%로 담지된 촉매에서 가장 높은 활성을 나타내었다. 또한, 10 wt% CuO/CeO₂ 촉매에 소량의 Fe₂O₃와 CoO의 조촉매 첨가는 CuO의 분산도를 높여 반응활성을 증가시켰다. Catalytic combustion of benzene over CeO₂-supported copper oxides has been investigated. The supported copper oxides catalysts were prepared using ball mill method and characterized by XRD, FT-IR, TEM and TPR. In the CuO/CeO₂ catalysts prepared using ball mill method, highly dispersed copper oxide species were shown at high loading ratio. The CuO/CeO₂ prepared using ball mill method showed the higher activity than those prepared using impregnation method. The catalytic activity increased with an increase in the CuO loading ratio, 10 wt% loaded CuO/CeO₂ catalyst giving the highest activity. In addition, the promoting of 10 wt% loaded CuO/CeO₂ catalyst with Fe₂O₃ and CoO enhanced the dispersion of CuO and then increased the catalytic activity.

능금산법으로 제조된 페롭스카이트형 산화물에서 벤젠의 촉매연소반응

정원영(Won Young Jung),홍성수(Seong-Soo Hong) 한국청정기술학회 2012 청정기술 Vol.18 No.3

페롭스카이트형 산화물을 능금산법으로 합성하여 TG/DTA, XRD, XPS, TEM 및 H₂-TPR 등에 의해 특성분석을 하였고, 벤젠의 연소반응에서의 활성을 조사하였다. 대부분의 촉매들은 페롭스카이트 결정구조를 잘 가지고 있었으며 15에서 70 nm의 크기를 나타내었다. LaMnO₃ 촉매가 가장 높은 활성을 보여주었고 350 ℃에서 거의 100%의 전환율을 나타내었다. 반응 활성을 증가시키기 위해 페롭스카이트 산화물의 A-와 B-위치에 다른 금속이온의 치환을 행하였다. LaMnO₃ 촉매의 A-위치에 Sr을 일부분 치환시키면 벤젠의 전환율이 증가하였다. 또한, B-위치에 Co 및 Cu 이온의 치환 역시 촉매 활성을 증가시켰고, LaMn1-xBxO₃ (B = Co, Fe, Cu)형 페롭스카이트에서 촉매활성은 Co > Cu > Fe의 순서로 감소하였다. Perovskite-type oxides were successfully prepared using malic acid method, characterized by TG/DTA, XRD, XPS, TEM and H₂-TPR and their catalytic activities for the combustion of benzene were determined. Almost of catalyst showed perovskite crystalline phase and 15-70 nm particle size. The LaMnO₃ catalysts showed the highest activity and the conversion reaches almost 100% at 350 ℃. The catalysts were modified to enhance the activity through substitution of metal into the A or B site of the perovskite oxides. In the LaMnO₃-type catalyst, the partial substitution of Sr into site the A-site enhanced the catalytic activity in the benzene combustion. In addition, the partial substitution of Co or Cu into site the B-site also enhanced the catalytic activity and the catalytic activity was in the order of Co > Cu > Fe in the LaMn1-xBxO₃ (B = Co, Fe, Cu) type catalyst.

자연사박물관 관람 시 중학생 소집단의 사회적 상호작용 중 대화에 드러난 환경 학습 요소

정원영(Won-Young Jung),김찬종(Chan-Jong Kim) 한국환경교육학회 2010 環境 敎育 Vol.23 No.4

This research aimed for revealing social interaction-based environmental learning elements at the natural history museum. First, we carried out a survey of the perceptual change about 'the environment' concept. It was for confirming whether environmental learning occurred in visiting. Second, we found environmental learning elements through analyzing dialogues among small group members during looking around the museum. Social interaction-based environmental learning elements were classified into five; knowledge, affection, value, skill, behaviour. Each environmental learning element included several sub-elements, so we revealed totally 9 environmental learning sub-elements. By results, we said characteristics and possibility of the natural history museum as an informal environmental educational institution. It is meaningful for extending areas of environmental education.