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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.
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.
3-레벨 ANPC 인버터의 고장 허용 운전 시 중성점 전압 균형 제어 기법
이재운,김지원,박병건,노의철 전력전자학회 2019 전력전자학회 논문지 Vol.23 No.2
This study proposes a neutral voltage balance control scheme for stable fault-tolerant operation of an active neutral point clamped (ANPC) inverter using carrier-based pulse width modulation. The proposed scheme maintains the neutral voltage balance by reconfiguring the switching combination and modulating the reference output voltage in order to solve the degradation of the output characteristic in the fault tolerant operation due to the fault of the power semiconductor switch constituting the ANPC inverter. The feasibility of the proposed control scheme is confirmed by HIL experiment using RT-BOX.
이재운 陸軍士官學校 1997 한국군사학논집 Vol.53 No.-
Conflict is a struggle among incompatible or opposing need, wishes, ideas, interests, of people. Conflict arises when individuals or groups encounter goals which cannot satisfactorily obtain. Many conflicts are usually related to the resource allocation and sharing. Conflict handing include such behaviors as competition, collaboration, compromise, avoidance, accommodation and etc. The purpose of this study was to suggests the strategy to magnify conflicts and aggressive behaviors between the North-Korean authorities and inhabitants. To cause and to increase the conflicts between the North-Korean authorities and inhabitants, the author mainly discussed the psychological variables about the difficulty of communication(a backward society of closed speech system), the structural problems(over control), the psycho-social problems(immature hostility handling and frustration) in the North-Korean society. Next the study analyzed the motivations and needs of five social classes such as the authorities, the intellectuals, the ordinary persons, the young students and the military authority in North-Korea. The proposed results of this study will make contribution to psychological warfare to enhance conflict behaviors between the North-Korean authorities and inhabitants. In conclusion, to accomplish an effective psychological warfare on the conflict causing, we must positively exercise multi-dimensional psychological warfares.