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PDP 구동 응용을 위한 저전압 스위칭 소자로 구성된 간단한 구조의 Multi-level 유지방전 회로
강순은(Soon-Eun Kang),남원석(Won-Seok Nam),한상규(Sang-Kyu Han),홍성수(Sung-Soo Hong),사공석진(Suk-Jin Sakong),양학철(Hak-Chul Yang),노정욱(Chung-Wook Roh) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
본 논문에서는 PDP 구동 응용을 위한 간단한 구조의 Multi-level 유지 방전 회로를 제안한다. 제안된 회로는 기존의 Multi-level 유지 방전 회로에 비해 적은 수의 스위칭 소자로 구현할 수 있어 간단한 구조를 가진다. 또한, 기존의 Multi-level 회로와 동일한 수준의 소자 전압 및 전류 스트레스를 가지므로, 저가의 고성능의 저전압 소자를 사용할 수 있어 PDP 구동 회로의 원가 저감과 고효율 동작을 이룰 수 있을 것으로 예상한다. 제안된 회로의 동작 원리를 설명하고, 42" HD급 PDP에 실제 적용 실험을 하여 제안된 회로의 우수성을 보인다.
강석한 ( Kang Seok-han ),안현기 ( Ahn Hyunkee ),홍은실 ( Hong Eun-sil ),민병곤 ( Min Byeong-gon ),조수진 ( Cho Su-jin ),이성준 ( Lee Sung-jun ),박현정 ( Park Hyun-jeong ) 이중언어학회 2017 이중언어학 Vol.67 No.-
The study investigated what variables affected more on Korean raters` production and fluency judgement to the Korean speakings of the advanced foreign learners. Nine professional Korean raters assessed sixty Korean learners` oral performance. The results are as follows: (1) fluency judgement for the Korean speaking follows the cross-linguistic trends, (2) the principal variables in judging L2 fluency include speech rate, F0 range, and pause frequency, (3) mean length of runs (number of syllables) - representing how many words the subjects express within the given time - comparatively lower effect in judging the fluency. The study also found that the wide range of F0 causes the higher scores of the fluency marks. The result could support the evidence that F0 - exerting how the subjects express the active intonation - is one of the important production and fluency cues, regardless of the spectrum structure of the target language. The result implies that Korean speaking education should focus more on the active intonation. (Konkuk University, Seoul National University, Sungkyunkwan University, Seoul National University, Seogang University, Seoul National University, Seoul National University)
임상연구 : 불임 환자에게 시행되는 난자 채취 시 Fentanyl과 Alfentanil을 이용한 정맥 마취의 비교
강용인 ( Yong In Kang ),방은치 ( Eun Chi Bang ),이현숙 ( Hyun Sook Lee ),조경숙 ( Kyung Sook Cho ),김수연 ( Su Yeon Kim ),설정호 ( Jung Ho Sul ),김준영 ( Jun Young Kim ),윤태기 ( Tae Gi Yoon ),석현하 ( Hyun Ha Seok ) 대한마취과학회 2008 Korean Journal of Anesthesiology Vol.55 No.5
Background: This study was carried out to compare the effect of intravenous anesthesia with fentanyl or alfentanil on the hemodynamic profile, sedation, recovery and side effect in the patients undergoing oocyte retrieval. Methods: The patients were designed to receive alfentanil (group A, n=70) or fentanyl (group F, n=70) intravenous anesthesia. The patients were given midazolam 0.6 mg/kg and alfentanil 15 μg/kg in group A or fentanyl 1.5 μg/kg in group F. Propofol 0.7 mg/kg was given if patient was awaken during procedure. Hemodynamic changes, propofol used dosage and initial propofol injecting time, Ramsay Sedation Scales, cough reflex on opioid injection, recovery time, duration of apnea and postoperative nausea, vomiting at the recovery room were recorded. Results: Group A had rapid onset, deep sedation, less amount of propofol used, more frequent apnea than group F. There were no significant differences in postoperative nausea, vomiting and recovery time between the two groups. Conclusions: The intravenous anesthesia with fentanyl or alfentanil are suitable for oocyte retreival but apnea happened more frequent in alfentanil group, so the use of alfentanil needs to monitor ventilation and hemodynamic changes carefully. (Korean J Anesthesiol 2008;55:543~8)
교통사고로 인한 편타성 손상 환자의 어혈방(瘀血方) 치료 효능에 관한 임상적 연구
송주현,조재희,이효은,강인,임명장,문자영,장형석,Song, Joo-Hyun,Cho, Jae-Hee,Lee, Hyo-Eun,Kang, Inn,Lim, Myung-Jang,Moon, Ja-Young,Jang, Hyoung-Seok 대한침구의학회 2007 대한침구의학회지 Vol.24 No.6
Objectives : The purpose of this study is to investigate the effect of eo-hyeol bang for patients with whiplash injury caused by a traffic accident. Methods : 60 patients were divided into two groups, Group A and Group B, of 30 patients each. Group A was treated with eo-hyeol bang twice per week for four weeks. Group B was treated with general acupuncture treatment twice per week for four weeks. Results : Between the two groups there was no significant difference in the VNRS score and the Neck disability index. Also, the study did not show significant difference between three variations of motion pattern induced pain and four stages based on the trauma duration of Group A. Conclusions : For patients with whiplash injury, eo-hyeol bang has not proven to be more effective than general acupuncture treatment.
막대 형태의 비구면 렌즈를 이용한 광통신용 시준기의 설계
강석봉,강은경,황보창권,강상도,김종섭,Kang, Seok-Bong,Kang, Eun-Kyoung,HwangBo, Chang-Kwon,Kang, Sang-Do,Kim, Jong-Sup 한국광학회 2008 한국광학회지 Vol.19 No.1
결합효율이 높고 정렬오차 발생 시 결합효율의 저하가 작은 광통신용 비구면 렌즈 시준기를 설계하였다. 비구면 시준 렌즈는 GRIN 렌즈와 작동거리와 두께가 유사하고 외경이 동일한 원통형 막대 형태로 설계해 GRIN 렌즈를 대체할 수 있도록 하였다. 결합효율의 저하는 시준렌즈의 구면수차에 의해 주요하게 발생하므로, 비구면 렌즈 시준기가 볼 렌즈, GRIN 렌즈 및 C-렌즈 시준기보다 높은 결합효율을 가지도록 비구면 계수를 최적화 해 구면수차를 낮추었다. 설계한 비구면 렌즈 시준기의 결합효율은 기존 시준기들보다 높았으며 정렬오차에 따른 결합효율의 감소도 작았다. A rod-type aspheric lens collimator for the optical telecommunication system which shows high coupling efficiency and experiences small coupling loss for misalignment errors is designed. The working distance, thickness, and diameter of the rod-type aspheric lens are determined to be close to those of the GRIN lens collimator in order to replace the GRIN lens with the rod-type aspheric lens. Since the coupling loss mainly originated from the spherical aberration of the lens, the spherical aberration in the rod-type aspheric lens is reduced drastically, and it turns out that the coupling efficiency of the rod-type aspheric lens collimator is higher than that of the available collimators, such as ball lens, GRIN lens, and C-type lens collimators.
진선미 ( Jin Sun-mi ),강은나 ( Kang Eun Na ),장용석 ( Jang Yong-seok ) 한국보건사회연구원 2011 保健社會硏究 Vol.31 No.3
본 연구의 목적은 만 7세 미만 미취학아동을 양육하는 여성 1,020명을 대상으로 사회서비스 지속성이 기혼여성의 경제활동 참여 여부와 형태에 미치는 영향을 분석하는 것이다. 분석자료는 한국복지패널조사(Korea Welfare Panel Study) 제1차년도(2006 년)부터 제4차년도(2009년)까지의 자료를 활용하였다. 사회서비스 지속성이 미취학자녀를 둔 기혼여성의 경제활동 참여여부에 미치는 영향을 파악하기 위해 패널로짓분석 (Panel logit analysis)을 실시하였으며, 경제활동 참여 형태에 대한 영향력 분석은 혼 합 다항로지스틱 회귀모형(Mixed-effects multinominal logistic regression model)을 이용하였다. 분석결과는 다음과 같다. 첫째, 본 연구의 독립변수인 사회서비스 지속성은 기혼여성의 경제활동 참여여부 및 형태에 유의미한 요인으로 나타났다. 경제활동 참여 형태와 관련하여 사회서비스 지속성은 비임금근로 및 임시직 ? 비정규직 취업에 긍정적 영향을 미쳤으나, 상용직 취업에는 부정적인 영향을 미치는 것으로 나타났다. 둘째, 미 취학아동을 양육하는 여성의 경제활동참여 여부에 영향을 미치는 요인으로는 연령, 교육수준, 배우자유무, 거주지역, 과거고용경험, 배우자의 월평균 소득이 유의미하게 나타났다. 셋째, 미취학아동을 양육하는 여성의 경제활동참여 형태는 연령, 교육수준, 배우자 유무, 거주지역, 과거고용경험이 비임금근로 및 임시직 · 비정규직에 유의미한 영향을 미 치는 것으로 나타났다. 이러한 결과를 통하여 본 연구에서는 현재 제공되고 있는 사회 서비스의 성격과 효과성을 규명하고, 기혼 여성의 고용가능성 및 노동시장 지위향상을 위한 정책적 그리고 실천적 함의를 제시하고자 하였다. This study is to examine the effects of social service continuity on married women`s labor participation and employment status. The samples of this study were 1,020 married women with children under 7 years of age, and this study used data from the first wave of Korea Welfare Panel Survey(KWPS, 2006) to the fourth wave of KWPS(2009). As statistical methods, Panel Logit Analysis and Mixed-effects multinominal logistic regression model were used to test the factors influencing married women`s labor participation and their employment patterns. The results were as follows. First, social service continuity has a statistically significant positive effect on married women`s labor participation. With relation to employment status, social service continuity has a significant positive effect on self-employed and temporary/irregular job status and has a significant negative effect on regular job status. Second, the economic participation of married women is determined by age, education, spouse`s monthly income, living location, and previous occupations. Third, the employment status of married women is significantly affected by age, education level, spouse`s monthly income, and previous occupations. Based on these empirical findings, the study has discussed some policy and practical implications to improve married women`s labor force participation.
폐경 후 여성환자들의 골밀도에 따른 요통 호전도의 비교 연구
이한,문자영,임염장,강인,조재희,이효은,정호석,이진혁,장형석,Lee, Han,Moon, Ja-Young,Lim, Myung-Jang,Kang, In,Cho, Jae-Hee,Lee, Hyo-Eun,Jung, Ho-Suk,Lee, Jin-Hyuk,Jang, Hyoung-Seok 척추신경추나의학회 2008 척추신경추나의학회지 Vol.3 No.2
Objectives : The aim of this study is to compare the improvement of Low back pain (LBP) depending on female inpatient's Bone mineral density (BMD) after menopause. Method : We evaluated 10 cases of normal and 25 cases of osteopenia and osteoporosis based on Bone mineral density test among the female inpatients with LBP who were after menopause, admitted at Jaseng Hospital of Oriental Medicine from January 2008 to August 2008. Result : Depending on the analysis of pathogenic cause, most were without specific reason and except that, overwork and lifting heavy weight were the most common reason. Using improvement-analysis based on treating period, the normal group showed higher decrease of Numerical Rating Scale (NRS) than osteopenia and osteoporosis group. Conclusion : Statically, among the female inpatients with LBP, who were after menopause, had no significant differences between the normal group and osteopenia and osteoporosis group's improvement rate, depending on treating period.