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권진만,정종철,차진열,이종욱 한국곤충학회 2012 Entomological Research Vol.42 No.3
We report two species that are new to Korea, Misetus borealis Kusigemati and Phaeogenes sapporensis Uchida. A key to Korean species of Phaeogenini, redescriptions and photographs of diagnostic characters are provided.
Multi-Code CDMA 시스템에서의 비선형 전력 증폭기의 영향분석
권진만,김상우 한국통신학회 1999 韓國通信學會論文誌 Vol.24 No.6
최근 들어 다양한 종류의 정보를 원하는 속도와 서비스품질(QOS)로 전송하고자 하는 Multi-Rate CDMA 시스템들에 대한 연구가 활발하다. 본 연구에서는 다양한 종류의 정보를 보내는데 있어서 쉽게 기존의 CDMA 시스템과 융화 될 수 있으며, 사용자가 요구하는 QOS와 전송 속도를 만족시킬 수 있는 Multi-Code CDMA 시스템에서 주요한 요소로 고려되고 있는 전력 증폭기의 비선형성을 고려하여 Multi-Code CDMA 시스템의 성능을 분석하였다. 분석에 사용한 비선형 증폭기의 모델링에는 다항식을 사용하였으며, 분석 결과 특히 주파수 선택적 페이딩의 경우 비선형에 의한 영향이 AWGN 채널에 비하여 훨씬 더 큼을 알 수 있었다. Recently a number of multi-rate CDMA systems have been proposed for the third generation mobile communication system. Multi-Code CDMA (MC-CDMA) offers the system construction advantage of being able to use a single-rate receiver. But MC-CDMA suffers from the distortion due to the nonlinearity of the power amplifier. In this paper, we analyze the effect of the nonlinearity on the bit error rate performance of MC-CDMA systems. A polynomial model is used to represent the amplifier amplitude nonlinearities.
20대 전반 여성의 로러지수 비만도와 자기인식 비만도에 따른 인체 인지에 관한 연구
권진 한국니트디자인학회 2015 패션과 니트 Vol.13 No.3
This study were intend to provide theoretical materials about clothing trend that females in their twenties favor through analysis on how they are aware of their own body according to Rohrer's Index and self-perceived obesity. This study were deal with differences between measured values from Rohrer's Index and self-awareness level regarding obesity. Domestic and overseas information database, network screening, and published data were utilized to obtain the relevant research materials. Closed-ended questions were used for research method. Anthropometry was adopted for assessment of Rohrer's Index. Collected samples were analyzed with PASW 18.0 statistical program. The results show a great difference between real obesity and awareness level among the women in their twenties. Majority of subjects do not know their exact obesity. Most of them even consider themselves as more obese than real. Also, the weight increases as an obesity level increases when compared to height. According to body size against obesity, measured sizes become larger in weight, chest, hip, waist, bust length, and bust point width as obesity increases in relation to both Rohrer Index and self-perceived obesity, indicating that weight and girth size are more influential to self-perception than height in obesity that they feel. In difference of body perception, there appears not much different perception among standard body shape group and obese body shape group as to both Rohrer Index and self-perceived obesity. Unlike this, there appears some difference in slim body shape group's breast, abdomen, and shoulder-waist-hip line as to real obesity and perceived level. For the ideal body shape that they think of, similar level appears in such body shapes as face, silhouette, abdomen, back, hip, and shoulder-waist-hip line in Rohrer Index and self-perceived obesity. However, difference takes place in breast shape, depending on the obesity. Results indicated that there are differences in perceiving the body, implying that differentiation is necessary in developing the female clothing based on obesity, accordingly.