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Folder Type 휴대폰 4중 대역 내장형 안테나 설계
최재중(Choi, Jae-Jung),이종현(Lee, Jong-Hyun),서상혁(Seo, Sang-Hyuk),손태호(Son Taeho) 한국산학기술학회 2008 한국산학기술학회 학술대회 Vol.- No.-
본 논문에서는 GSM/DCS/USPCS/WCDMA대역에서 사용할 수 있는 IFA 형태의 내장형 안테나를 설계 하고 이를 제작하였다. 이 안테나는 제한된 공간에서 기본 IFA에 전류 흐름의 상쇄작용을 고려하여 4 중 대역을 형성 시켰으며, GSM대역에서 Maximum Gain 2.23dBi~2.89dBi, DCS/USPCS/WCDMA대역에서 -3.24dBi~0.74dBi의 결과를 얻었다. 방사패턴 또한 전방향성에 가까운 특성을 가지고 있으며 전체적인 평균효율은 약 15% 향상됨을 확인할 수 있다.
미국 교과서와의 비교를 통한 초등과학 교과서의 체제와 구성방향에 대한 교사들의 인식조사
임희준·박윤희·심향미·최재중·김현정 仁川敎育大學校 科學敎育硏究所 2009 과학교육논총 Vol.22 No.-
This study investigated elementary teachers' perceptions on the structure and organization of science textbook. 82 teachers were responded to essay questions about their preference and perceptions of the effective elementary science textbook structure and contents. Teachers preferred to use everyday-life examples in introductions part in order to enhance students' interest and motivation. Teachers needed more conceptual explanation about experiment and phenomena. They referred importance of the relationship between inquiry and conceptual understanding. Teachers perceived that inquiry process need to be explained in detail. Implications of the development of the science textbook were discussed.
태음인 청폐사간탕이 lipase 활성저해 및 db/db mouse의 체중감량, 혈장지질, UCP 1, 2 발현에 미치는 영향
김은영,설유경,최재중,전수형,김훈,김종원,Kim, Eun-Young,Sul, Yu-Kyung,Choi, Jae-Jung,Jeon, Soo-Hyung,Kim, Hoon,Kim, Jong-Won 사상체질의학회 2007 사상체질의학회지 Vol.19 No.1
1. Objectvies This experimental study was designed to investigate the effect of cheongpesagan-tang extract on the obstruction of the lipase activity and weight, plasma, UCP1, 2 mRNA in db/db mouse. Material and Methods: The body weight loss, food intake, feeding efficiency ratio, weight of the internal organs (liver, kidney, epididymal fat, brown adipose tissue), plasma glucose, triglyceride, total cholesterol, white adipose tissue, adipocyte size distribution, expression of UCP1, 2 mRNA were measured in db/db mouse administered Cheongpesagan-tang extract for 6 weeks. These were then compared with those of control groups administered the diet. 2. Results 1) Inhibitory effect against lipase activity was Kilgyung(81.7%), Nabokja (73.1%), Seungma(73.0%), Daewhang (68.4%), Kalgeun (55.3%), Kobon(34.5%), Hwanggeum(4.2%). 2) In the sample group, the body weight was significantly decrease than that of control group. 3) In the sample group, the weight of epididymal fat showed significantly decrease than that of control group. 4) In the sample group, triglyceride showed significantly decrease than that of control group. 5) In the sample group, distribution of adipose tissue showed significantly larger than that of control group. 6) In the sample group, UCP1, 2 mRNA in BAT showed significantly increase than that of control group. 3. Conclusions These results show that cheongpesagan-tang has an effect on the treatment of obesity.