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박재용,황승민,임민규,오영규,박재용,한석영 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-
This paper presents a reliability-based topology optimization (RBTO) using bi-directional evolutionary structural optimization (BESO). An actual design involves uncertain conditions such as material property, operational load and dimensional variation. Deterministic topology optimization (DTO) is obtained without considering of uncertainties related to the uncertainty parameters. However, the RBTO can consider the uncertainty variables because it has the probabilistic constraints. In this paper, the reliability index approach (RIA) is adopted to evaluate the probabilistic constraint. RBTO based on BESO starting from various design domains produces a similar optimal topology each other. Numerical examples are presented to compare the DTO with the RBTO.
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박재용,임민규,오영규,박재용,한석영,Park, Jae-Yong,Lim, Min-Kyu,Oh, Young-Kyu,Park, Jae-Yong,Han, Seog-Young 한국생산제조학회 2010 한국생산제조학회지 Vol.26 No.2
This paper presents a reliability-based topology optimization (RBTO) using bi-directional evolutionary structural optimization (BESO). An actual design involves uncertain conditions such as material property, operational load and dimensional variation. Deterministic topology optimization (DTO) is obtained without considering of uncertainties related to the uncertainty parameters. However, the RBTO can consider the uncertainty variables because it has the probabilistic constraints. In this paper, the reliability index approach (RIA) is adopted to evaluate the probabilistic constraint. RBTO based on BESO starting from various design domains produces a similar optimal topology each other. Numerical examples are presented to compare the DTO with the RBTO.
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박재용,임민규,오영규,박재용,한석영,Park, Jae-Yong,Im, Min-Kyu,Oh, Young-Kyu,Park, Jae-Yong,Han, Seog-Young 한국생산제조학회 2010 한국생산제조학회지 Vol.25 No.5
Reliability-based topology optimization (RBTO) is to get an optimal topology satisfying uncertainties of design variables. In this study, reliability-based topology optimization method is applied to the inner reinforcement of vehicle's hood based on BESO. A multi-objective topology optimization technique was implemented to obtain optimal topology of the inner reinforcement of the hood. considering the static stiffness of bending and torsion as well as natural frequency. Performance measure approach (PMA), which has probabilistic constraints that are formulated in terms of the reliability index, is adopted to evaluate the probabilistic constraints. To evaluate the obtained optimal topology by RBTO, it is compared with that of DTO of the inner reinforcement of the hood. It is found that the more suitable topology is obtained through RBTO than DTO even though the final volume of RBTO is a little bit larger than that of DTO. From the result, multiobjective optimization technique based on the BESO can be applied very effectively in topology optimization for vehicle's hood reinforcement considering the static stiffness of bending and torsion as well as natural frequency.
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박재용,Park, Jae-Yong 대한경영정보학회 2009 경영과 정보연구 Vol.28 No.3
정부는 2004년 IT839 전략의 하나로 VoIP를 8대 신규 서비스로 지정하였고, 정부와 일부 사업자에 의해 적극적으로 추진되었다. 인터넷전화는 유선전화와는 달리 이동성이 보장되어 어디서나 인터넷 단말기만 가지고 있으면 인터넷에 연결하여 통화를 할 수 있을 뿐만 아니라 각종의 부가서비스(영상통화, 데이터전송, 인터넷접속 등)가 가능하다는 장점과 더불어 이용요금도 이동전화와 유선전화와 비교했을 때 저렴한 편이다. 국내 통신 기업들은 포화된 국내 통신서비스 시장의 새로운 비즈니스모델 창출을 위해 각종의 부가서비스 제공이 가능한 인터넷전화에 주목하고 있고 통신 소비자들은 저렴한 인터넷 전화요금과 우리나라의 가계당 통신비중이 높다는 점, 그리고 각종 부가서비스가 제공되는 인터넷전화의 긍정적 요인에 크게 반응할 것으로 보인다. 현재는 VoIP가 유선전화시장을 급속하게 대체할 것으로 예측되며, 초고속 하향패킷접속과 와이브로(WiBro: Wireless Broadband Internet)기반의 이동통신에서 VoIP가 장착이 된다면 이동전화를 위협하는 Killer Application으로 자리 잡게 될 것으로 보인다. 또한, 이 기술은 단지 음성전화 뿐만 아니라 SMS(Short Message Service), 음성채팅, 영상통화 등의 다양한 부가 서비스가 가능하며 통신.방송의 융합에 따른 방송서비스까지 가능한 실시간 멀티미디어 서비스 제공을 위한 핵심기술이라는 점에서 최근에 더욱 관심이 증폭되고 있다. 결국 인터넷 전화는 기존의 일반전화가 가진 장단점을 모두 흡수하여 새로운 혁신을 가져 올 것으로 예상된다. 향후 인터넷 전화의 발전과 대중화를 위한 발판을 마련하기 위한 후속적 연구가 지속되어야 할 것이다. Internet was first designed only for sending data, but as the time passed, internet started to evolve into a broadband multi-media web that is capable of transmitting sound, video, high-capacity data and more due to the demands of internet users and the rapid changing internet-communication technology. Domestically, in January, 2000 Saerom C&T, launched a free VoIP, but due to limited ways of conversation(PC to PC) and absence of a revenue model, and bad speech quality, it had hit it's growth limit. This research studied VoIP based on technological enhancement in super-speed internet. According to IDC, domestic internet market's size was 80,800 million in 2008, and it formed a percentage of 12.5% out of the whole sound-communication market. in case of VoIP, it is able to maximize it's profit by connecting cable and wireless network, also it has a chance of becoming firm-concentrated monopoly market by fusing with IPTV. Considering the fact that our country is insignificant in MVNO revitalization, regulating organizations will play a significant roll on regulating profit between large and small businesses. Further research should be done to give VoIP a secure footing to prosper and become popularized.
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정보센터의 품질경영시스템 도입 인식도에 관한 실증적 연구
박재용 한국정보관리학회 2002 정보관리학회지 Vol.19 No.3
Modern stage must offer to the level which the customer requests the quality of the information service to offer from the information center. We are the one view which needs new system management around the process serving this. This study accomplished theoretical review of ISO 9000 as International Quality Management System. investigated the trend for change of ISO 9000 certification systems. We analyzed the recognition level of members about the introduction of ISO 9000 quality management systems in the information center. The level up of recognition about ISO 9000 quality management system certification systems was the low in the information center. Hereafter, We grasped the subject of ISO 9000 certification systems which the introduction needs. We reviewed ISO 9000 family which the Library and Information center possible apply and presented the requirement in the library and information center with the process to need for a Quality Management System certification. 현대는 정보센터에서 제공하는 정보서비스의 품질을 고객이 요구하는 수준으로 제공하여야 한다. 이를 위하여 프로세스를 중심으로 한 시스템 경영이 필요한 시점이라고 할 수 있다. 본 연구는 국제적인 품질경영시스템인 ISO 9000 인증제도의 이론적 검토를 통하여 ISO 9000 인증제도와 인증 추이를 조사하였다. 아울러 이를 정보센터에서 ISO 9000 품질경영시스템의 도입에 대한 조직 구성원들의 인식도를 설문조사, 분석하였다. 이를 통하여 정보센터에서 ISO 9000 품질경영시스템 인증제도에 대한 인식제고와 향후 ISO 9000 인증제도의 도입시 필요한 사항 등을 파악하고자 하였다.
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Gateway RFP-Fusion Vectors for High Throughput Functional Analysis of Genes
박재용,황은미,박남미,Eunju Kim,김동규,강다원,한재희,최완성,류판동,홍성근 한국분자세포생물학회 2007 Molecules and cells Vol.23 No.3
There is an increasing demand for high throughput (HTP) methods for gene analysis on a genome-wide scale. However, the current repertoire of HTP detection methodologies allows only a limited range of cellular phenotypes to be studied. We have constructed two HTP-optimized expression vectors generated from the red fluorescent reporter protein (RFP) gene. These vectors produce RFP-tagged target proteins in a multiple expression system using gateway cloning technology (GCT). The RFP tag was fused with the cloned genes, thereby allowing us localize the expressed proteins in mammalian cells. The effectiveness of the vectors was evaluated using an HTP-screening system. Sixty representative human C2 domains were tagged with RFP and overexpressed in HiB5 neuronal progenitor cells, and we studied in detail two C2 domains that promoted the neuronal differentiation of HiB5 cells. Our results show that the two vectors developed in this study are useful for functional gene analysis using an HTP-screening system on a genome-wide scale.
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DBpia
