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이재운,김성식,Lee, Jae-Un,Kim, Seong-Sik 한국컴퓨터산업학회 2007 컴퓨터産業敎育學會論文誌 Vol.8 No.4
최근의 교육적 패러다임은 정보 통신의 발전에 따라 지식의 수동적인 전수자로서의 교육이 아닌, 실세계의 복잡하고 다양한 문제를 해결할 수 있는 능동적인 구성자로서의 교육을 요구하고 있다. 이러한 변화는 정보와 아이디어의 소유보다는 공유를 통해 다른 사람의 다양한 시각을 접할 수 있는 교육-환경을 요구한다. 이에 본 연구에서는 발표학습을 통한 상호작용 효과를 극대화하기 위해 발표의 일회성에 기인하는 단점, 발표자료의 재활용이 미흡한 점을 보완하며, 상호작용 활동의 연장, 발표활동에 참여하지 못하는 학습자에 대한 동기 부여를 통해 지속적인 상호작용이 가능하도록 웹 기반 형태의 발표학습 전략을 설계하였다. 이를 위해 동료학습자간 발표자료 제공자와 학습자로 구분하여 각각의 역할을 제시하고, 발표학습을 지원하기 위한 시스템 구성 전략을 단계별로 제시하였다. 본 연구에서 제안하는 발표학습 전략을 통해 동료학습자간의 지속적인 상호작용이 가능하며, 시 공간 제약없이 하교 후에도 가정에서 발표학습 활동이 계속 이루어져 상호작용을 통한 교육적 효과가 클 것으로 기대된다. Recording to development of info-communication, recent educational paradigm asks not for a passive transmitter but an active constructor who can solve the various complicated problems in real situations. Such a change asks for the educational setting which includes sharing ideas and information rather than possessing them by themselves. Learning through presentation has many problems which are few chances of presentation as well as reusing of presentation data. etc. This study suggested the strategy which are promoting interactions through presentation class and using practically. For this, role of the presentation data provider and learner was suggested, also strategies to implement of the presentation learning support system step by step. Through the strategy of this paper could maintain the active communicating relationship between the learners. Without the limitation of the time and space, the real time communication is made while looking at the presentation data of the other party, the teaming effect by the presentation teaming strategy is expected to be high.
탄소에 의한 전기로 분진 중 Zn, Pb, Cl, Fe, Cu 및 Cd화합물의 환원반응
이재운,김영진,서성규,이광학,김영홍 한국자원리싸이클링학회 2000 資源 리싸이클링 Vol.9 No.4
Reduction of Electric Arc Furnace dust with carbon (graphite) was studied at the temperature range of $800^{\circ}C$ to $1100^{\circ}C$ in Ar gas atmosphere. The briquetted dust with graphite powder was heated in a vertical tube furnace for given reaction time and Quenched in Ar gas atmosphere. It was found that initially the reduction of Zn was chemically controlled and the activation energy was about 120 KJ/mole. Because the almost all of Pb was removed with Cl in the form of $PbCl_2$, it is considered that Pb is removed by chloride reduction. Cu was vaporized as a chloride up to 30% of its original content, but the remaining of Cu would be accumulated with the reduced iron. and also, Cd was removed completely within 15 min. at $1000^{\circ}C$. 전기로 더스트 중에 함유된 Zn, Pb, Cl, Fe, Cu 및 Cd의 건식 환원반응기구를 규몽하고자 탄소뿔 첨가한 더스트 Briquette를 제조하여 Ar 가스 분위기 하의 $800^{\circ}C$ ~ $1100^{\circ}C$반응온도에서 실험을 행하였다. 탄소에 의한 Zn 화합물으 환원반응은 온도상승에 따라 민감하게 나타났으며 반응초기에는 화학반응에 의한 음속단계로 활성화에너지 값은 약 120.6 kl/mole이었다. 한편, Pb와 Cl은 $PbCl_2$의 형태로 휘발되었으며 이들의 휘발제거율은 거의 일치하였다. 또한, 환원제를 첨가하지 않는 경우가 환원제 첨가시 보다 휘발제거율이 빨라 Pb의 대부분은 염화휘발에 의해 제거됨을 알 수 있었다. Cu는 염화휘발에 의해 최대 약 30% 제거되고 나머지 대부분은 Fe와 함께 더스트 중에 잔존하여 Cd은 $1000^{\circ}C$에서 15분만에 거의 100%의 휘발제거율을 나타내었다.
이재운 한국스포츠리서치 2005 한국 스포츠 리서치 Vol.16 No.2
The purpose of this study was to analyze the differences of middle school students' perceptions for physical education according to sex. To achieve this purpose, the researcher used the case study utilized qualitative method. The participants of this study were 356 students(male: 180. female: 176) in the middle school. The data was collected by group interviews. The data was analyzed by an inductive categorical analysis. The collected data was verified by member checks, peer debriefing. and triangulation. The conclusions of this study were as follows. First, students perceived physical education as interesting subject, subject granted physical activity, subject enforced outside the class, and unrestricted subject out of a burden regardless of sex. Second, male students perceived physical education as one's preferring subject, subject promoted health and physical fitness. But female students perceived physical education as subject experienced poor motor skills, one's dislike subject, and subject experienced of one's physical insufficiency.
Software Reliability for Order Statistic of Burr XII Distribution
이재운,윤상철 한국데이터정보과학회 2008 한국데이터정보과학회지 Vol.19 No.4
The analysis of software reliability model provides the means to analysts, software engineers, and systems analysts and developers who want to predict, estimate, and measure failure rate of occurrences in software. In this paper, reliability growth model, in which the operating time between successive failure is a continuous random variable, is proposed. This model is based on order statistics of two parameters Burr type XII distribution. We propose the measure based on U-plot. Also the performance of the suggested model is tested on real data set.