천추혈(天樞穴)에 대(對)한 문헌적(文獻的) 고찰(考察)

이종현,성낙기,Lee, Jong-Hyeon,Seong, Nak-Gi 대전대학교 한의학연구소 1995 한의학연구소 논문집 Vol.4 No.1

차세대 구조용 강재

이종현,Lee, Jong-Hyeon 기술표준원 2006 기술표준 Vol.49 No.-

RFID 태그 제조공정과 저가격 방안

이종현,Lee, Jong-Hyeon (사)한국포장협회 2008 包裝界 Vol.182 No.-

802.15.4 PHY 기술

이종현,Lee, Jong-Hyeon 한국통신학회 2007 정보와 통신 Vol.24 No.6

유비쿼터스 네트워크 시대가 도래함에 따라 표준화된 기술의 파악 및 이에 따른 응용 서비스 요구가 증대되고 있다. 본 고에서는 저속(Low Rate) 통신규격을 제공하는 표준인 IEEE 802.15.4의 표준화의 기술적 개관 및 물리계층에 대하여 서술한다. 2006년 9월 판 표준안에 제시된 물리계층(PHY)의 주파수 대역별 데이터율과 변조방식 및 심볼 사상에 관하여 기술한다. 또한, 변조 방식 및 전송 주파수에 따른 전송 특성, 채널 할당 방식 그리고 스펙트럼 방사 출력 등에 관해 기술한다.

솔더 나노입자를 사용한 TSV Interconnection 기술

이종현,윤종호,현창용,Lee, Jong-Hyun,Yoon, Jong-Ho,Hyun, Chang-Yong 대한용접접합학회 2011 대한용접·접합학회지 Vol.29 No.3

복합생물막 반응기를 이용한 하수처리시 인 제거 특성

이종현,남해욱,김영규,박태주 ( Jong Hyun Lee,Hae Uk Nam,Young Gyu Kim,Tae Joo Park ) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.2

A new biological nutrient removal system combining A²/O process with fixed film was developed in this work and the characteristics of phosphorus removal were especially investigated in the combined fixed film reactor(CFFR). Media was added in the anaerobic, anoxic and aerobic reactors, respectively. Tests were made to establish the effluent level of T-P, COD, pH, SS and nitrate effects on phosphorus removal in the CFFR by decreasing hydraulic retention time (HRT) from 10 to 3.5 hours and by increasing internal recycle ratio from 0% to 200%. The influent was synthesized to levels similar to the average influent of municipal wastewater treatment plants in Korea. SARAN media with a porosity of 96.3% was packed 40%/30%/25% based on its reactor volume, respectively. It was found that T-P removal efficiencies were 39.4% 20.5% as HRT decreased from 10 hours to 3.5 hours and optimum range of pH for effective phosphorus removal was 6.8∼7.7. Nitrate inhibited the P release in anaerobic reactor. As the internal recycle ratio increased from 0% to 100%, T-P removal efficiency increased in CFFR process, while T-P removal efficiency decreased at the condition of the internal recycle ratio, 200%. Further study especially on P uptake by denitrifying phosphorus removal bacteria in anoxic reactor is needed to enhance T-P removal efficiency in CFFR process.

XOnto-Apriori: 확장된 온톨로지 추론 기반의 연관 규칙 마이닝 알고리즘

이종현,김장원,정동원,이석훈,백두권,Lee, Chong-Hyeon,Kim, Jang-Won,Jeong, Dong-Won,Lee, Suk-Hoon,Baik, Doo-Kwon 한국정보처리학회 2011 정보처리학회논문지D Vol.18 No.6

In this paper, we introduce XOnto-Apriori algorithm which is an extension of the Onto-Apriori algorithm. The extended algorithm is designed to improve the conventional algorithm's problem of comparing only identifiers of transaction items by reasoning transaction properties of the items which belong in the same category. We show how the mining algorithm works with a smartphone application recommender system based on our extended algorithm to clearly describe the procedures providing personalized recommendations. Further, our simulation results validate our analysis on the algorithm overhead, precision, and recall. 이 논문에서는 연관 규칙 마이닝 알고리즘의 정확도를 향상시키기 위하여 기존 Onto-Apriori 알고리즘을 확장한 XOnto-Apriori 알고리즘을 제안한다. 기존 알고리즘은 트랜잭션 항목의 식별자만을 비교하여 지지도를 계산하기 때문에 유사한 속성을 가진 항목들간의 관계를 분석하지 못하는 문제점을 지닌다. 이러한 문제점을 해결하기 위해 제안 알고리즘은 온톨로지 추론 기반의 속성 비교를 통해 같은 식별자를 지니지 않는 항목들간의 관계성도 지지도 계산에 반영할 수 있도록 한다. 제안 알고리즘의 규칙 생성 과정을 명확히 서술하기 위해 스마트폰 어플리케이션 추천 시스템을 설계하였으며 이 시스템은 기존 알고리즘 기반의 시스템에 비해 보다 나은 속도와 정확도를 보였다.

흰쥐를 이용한 실험적 맥락막신생혈관 모델에서 유리체강내 양막 주입의 효과

이종현,정재림,홍사민,고형준,Jong Hyun Lee,Jae Lim Chung,Samin Hong,Hyoung Jun Koh 대한안과학회 2008 대한안과학회지 Vol.49 No.7

Purpose: To evaluate the effects of an intravitreal amniotic membrane (AM) injection on a rat model of laser-induced choroidal neovascularization (CNV). Methods: Intravitreal injection of AM (12.5 µg/mL) into the left eyes and phosphate-buffered saline into the fellow eyes of 15 rats was performed immediately after laser injury. At week 2, after angiography, the rats were sacrificed, and histopathologic analysis was performed. Angiographic and histopathologic assessments of the effects of AM injection on CNV growth were compared between the two groups. Results: CNV thickness was found to have increased more in the AM treatment group (141.54±8.12 µm) than in the experimental control group (65.23±16.90 µm) (p=0.010). Conclusions: Intravitreal AM injection demonstrated histopathologic pro-angiogenic properties in a rat model of CNV. J Korean Ophthalmol Soc 49(7):1154-1158, 2008

미용전공 여대생과 비전공 여대생의 체형인식, 신체만족도 및 식습관 비교 연구

이종현,김민선,오주환,Lee, Jong-Hyun,Kim, Min-Sun,O, Ju-Hwan 동아시아식생활학회 2007 동아시아식생활학회지 Vol.17 No.4

This study was carried out to investigate perceptions of body image, body satisfaction, and dietary habits of beauty art major and non-major college students in Gyeonggi province. A total of 312 self-administered questionnaires (beauty art majors=145; non-majors=167) were analyzed. The means for height, weight, and BMI were 161.7 cm, 51.4 kg and 19.7, respectively. There were more majors who were underweight according to BMI classification than non-majors. Sixty-six percent of the subjects had previous weight control experience, and there was no significant difference between the majors and non-majors. The mean score for current body image was 4.61 out of a possible 9 points in the majors, which was significantly lower than 4.95 in the non-majors, and their perception of an ideal body image was thinner than their current body image. Those with more weight control experience had currently heavier perceptions of their body. The mean score for body satisfaction was 2.60 out of a possible 5 points, which was lower than the mean score for their attitudes toward the importance of their bodies. The mean score for dietary habits was 2.80 out of a possible 5 points, and there was no significant difference with dietary habits according to weight control experience or BMI classification. In both the majors and non-majors, there was a significant positive correlation between BMI and perception of current body image (p<0.001, p<0.001), and a negative correlation between BMI and body satisfaction (p<0.01, p<0.001). In the major students, there were significant positive correlations between dietary habits and body satisfaction (p<0.01), and attitudes toward the body importance (p<0.05); therefore, the greater their body satisfaction and body importance, the higher their scores for dietary habits.

고등학교 급식 조리종사원의 영양지식과 영양교육 경험과의 관계 연구

이종현,류경,Lee, Jong-Hyun,Ryu, Kyung 동아시아식생활학회 2006 동아시아식생활학회지 Vol.16 No.6

This study was designed to investigate the relationships between nutrition education, nutrition awareness and nutrition knowledge of school food service employees. We analyzed 288 self-administered questionnaires. Most of the employees (89.8%) were with contract-managed food services, 45.1% were $41{\sim}50$ years old, and 45.4% had chef certification. Two-thirds of the employees received nutrition education on 'nutritionally balanced diet' and 'sources of calcium', whereas less than 50% received education on 'problems with carbohydrates', 'functions of iron', 'deficiency and sources of iron'. The degree of nutrition awareness was generally higher than the level of nutrition education experience. The mean nutrition knowledge score was 11.7 out of 20 possible points, The majority of employees correctly identified 'sources of calcium (91.8%)', 'functions of carbohydrates (91.4%)', 'sources of cholesterol (91.0%)', and 'problems with lipids (90.4%)'; less than 50% correctly answered 'sources of proteins (18.9%)', 'functions of iron (27.9%)', 'recommended dietary allowances (32.0%)', 'functions of lipids (40.2%)', and 'sources of vitamins (44.3%)'. A chi-square analysis revealed that the employees' actual knowledge did not differ significantly by nutrition education - with the exception of three topics; 'recommended dietary allowances', 'changes in vitamins during cooking', 'functions of water' - or by their nutrition awareness. Nutrition knowledge scores did not differ by sex, decreased with age, increased with academic background, and increased in careers of >10 years or that were contract managed. There were significant correlations between nutrition education scores and nutrition awareness scores (p<0.001); nutrition knowledge scores and nutrition education scores (p<0.001); nutrition knowledge scores and nutrition awareness scores (p<0.001).