http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Development of an SIS (Superconductor-Insulator-Superconductor) Junction Mixer over 120~180 GHz Band
정문희,이창훈,김광동,김효령 한국전자파학회 2004 한국전자파학회논문지 Vol.15 No.8
120∼180 GHz 대역의 고정 튜닝방식을 사용한 SIS(Superconductor-Insulator-Superconductor) 접합 믹서를 개발하였다. 이 믹서는 노베야마 전파천문대에서 제작된 6개 직렬 연결 Nb/Al-Al2O3/Nb SIS 접합 소자를 사용하였으며 석영유리 기판에 제작된 이 SIS 칩은 전 주파수 대역에서 입력신호 결합을 향상시키기 위해 half-height 도파관의 중심에 놓여 있다. 본 논문에서 개발된 SIS 믹서는 기계적인 튜닝 장치를 사용하지 않으며 RF 신호와 LO 전력은 냉각된 십자형 방향성 결합기를 통해서 믹서에 공급된다. 또한 IF 신호 손실을 줄이기 위해 SIS 믹서의 IF 출력 임피던스를 IF 증폭단의 50 Ω 입력 임피던스에 정합 시켰다. SIS 수신기의 측정된 DSB 잡음온도는 120∼180 GHz 대역에서 32∼131 K이며 본 논문에서 개발된 SIS 믹서는 대덕전파천문대의 14 m 전파망원경에 설치되어 전파천문 관측에 사용되고 있다.
전라남도 진도 인근지역의 초등학생, 학부모, 영양(교)사의 친환경식품에 대한 인식과 학교급식 만족도
정문희,김선희,장문정 한국영양학회 2013 Journal of Nutrition and Health Vol.46 No.4
The aim of this study was to investigate the perception of students, their parents, and nutrition teachers regarding environment-friendly foods (EFF) and the satisfaction with school meals at elementary schools. Questionnaires were sent to nutrition teachers at five elementary schools located in the Jindo area, Jeonnam province, and were distributed to students and their parents. A total of 351 questionnaires from students and 334 from parents were collected from March to April, 2013. In addition, 43 nutrition teachers/dietitians working at elementary schools in the Jindo area responded to questionnaires. Nutrition teachers primarily recognized the classification and certification standards of EFF, and verified the certification mark of EFF when they purchased foods. However, 13.4% of students and 38.6% of parents replied as ‘know well’ regarding the classification and certification standards of EFF and they verified the mark of EFF less often than the nutrition teachers (p < 0.001). Most of the nutrition teachers and parents indicated ‘safety’ as the main advantage of EFF. The students and parents were satisfied with EFF at home and school meals because of the safety and favorable effect on health. The results showed that EFF compromised 20-40% of monthly food costs for 51.1% of nutrition teachers. The overall score for satisfaction with school meals for students was 3.88 based on a 5-point Likert scale; however, that of the parents was 3.72. The nutrition teachers realized that the parents were more interested in EFF and satisfied with EFF than the students. The major barriers to using EFF in school meals were ‘lack of information about EFF’ and ‘unstable supply.’ Therefore, the above results suggested that there should be improvement in the supply of EFF to include more EFF in school meals and efforts should be made to provide students and parents with more information for understanding EFF.
반복적인 호흡기 증상을 주소로 내원한 13세 여아에서 진단된 낭성섬유증 1예
정문희,정성수,김형영 대한 소아알레르기 호흡기학회 2020 Allergy Asthma & Respiratory Disease Vol.8 No.3
Cystic fibrosis (CF) is a chronic progressive autosomal recessive disease and caused by cystic fibrosis transmembrane conductance regulator (CFTR) gene mutations. CFTR gene encodes an ion channel involved in salt and water transport in multiple organs including lung, pancreas and reproductive tract. To date, more than 2,000 mutations of CFTR gene have been identified. Because the age of onset and the severity of symptoms may vary greatly, a diagnosis of CF can be challenging. Although CF is common in Caucasians, it is extremely rare in Koreans. A few cases of CF have been reported in Korean children since 1988. Here, we report a 13-year-old girl carrying c.263T>G (p.Leu88X) and c.2977G>T (p.Asp993Tyr). Furthermore, we reviewed 22 Korean cystic fibrosis cases reported in the literature. .
정문희,유인영 한양대학교 의과대학 1998 한양의대 학술지 Vol.18 No.2
The purpose of this study is to inquire into the frequency of conversation with parents and the need for sex education of adolescents. This study was conducted on 1577 high school students in Chung-gu area of Seoul by menas of questionnaires during the period of October 1 to October 30 in 1997. The obtained results are as follows. 1. The frequency of conversation with parents was moderate, scoring 1.74 out of 4 points. 2. As for the anatomical and physiological knowledge, they made an average scoring 2.1 out of 4 points. And as for the knowledge on venereal diseases, they made an average of 4.8 correct answers to 13 questions. 3. Those who had few sexual worries and didn't conceal the fact that they kept friends with an opposite sex showed the high frequency of conversation with their parents. 4. Sex education was, mostly, dependent on school. It was scarcely, if ever, conducted at home. Based on these results, we propose that an educational program should be developed to train parents partly responsible for sex education.