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Three-Arm Branch $90^{\circ}$ Hybrid Coupler를 이용한 평형증폭기 설계에 대한 연구
김선숙,서철헌,Kim, Seon-Sook,Seo, Chul-Hun 대한전자공학회 2006 電子工學會論文誌-TC (Telecommunications) Vol.43 No.2
본 논문에서는 중심주파수가 2GHz인 광대역 평형증폭기를 설계 및 제작 하였다. 본 논문에서는 $90^{\circ}$ Hybrid Branch-Line Coupler 와 Three-Arm Branch $90^{\circ}$ Hybrid Coupler의 특성을 비교하여, 광대역 특성을 나타내는 Three-Arm Branch $90^{\circ}$ Hybrid Coupler를 이용한 평형증폭기를 설계 및 제작하였으며, 제안된 증폭기는 대역폭이 480MHz이며, VSWR은 1.06 이하이고, 이득은 15.47dB의 특성을 보였다. In this paper, broadband balanced amplifier has been realized with Three-Arm Branch $90^{\circ}$ Hybrid Coupler at center frequency 2GHz. $90^{\circ}$ Hybrid Branch-Line Coupler has been compared with Three-Arm Branch $90^{\circ}$ Hybrid Coupler. The bandwidth VSWR and gain or proposed amplifier have been 480MHz, 1.06 and 15.47dB, respectively.
김선숙,소희영,이태용,Kim, Sun-Sook,So, Hee-Young,Lee, Tae-Yong 한국가정간호학회 1998 가정간호학회지 Vol.5 No.-
This study enrolled one thousand five hundred twenty one clients that were receiving home care services at five health centers and a home care services center in the city of Taejon from November 17 through December 7, 1997. The purpose of this study was to analyze satisfaction levels, general characteristics and efficacies, of the client served home care. The main results were as follows; The age group of most of the subjects was 70-79 years: 76.9% of them were female and 87.3% were over 65 years. In education variables, over 90% of the clients were below primary school. In marital status variables, 63.4% of them had no spouse, 57.5% of them were widows and widowers. In living arrangement variables, alone(35.8%) was the most. In insurance status variables, medical aid(69.9%) was the most. In household income variables, below 000 won(72.6%) was the most. In hospitalization variables, 53% of the clients had no hospitalization. The satisfaction level of home care service of male and female was similar. The older the age, the higher the satisfaction level. The satisfaction level of the group having religion was higher than the group having no religion and the Christianity group had the highest satisfaction level(p<0.001). In education variables, the over high school group was the highest satisfaction level(p<0.01). In living arrangement variables, the other (sisters or neighbors etc.) group indicated the highest satisfaction level(p<0.001). In insurance status variables, the other group(except for medical aid) was the highest satisfaction level(p<0.001). In household income variables, below 390,000 won was the highest satisfaction level(p<0.001). In hospitalization variables, 'over 4 times' group indicated the highest satisfaction level (p<0.01). Home care took place more in health centers than in home care services center. In frequency of home care per month three times was the most. In opinion of home care frequency per month 82.8% of the people answered 'proper'. A lot of present illness was neuralgia, arthritis, digestive disease, hypertension & CVA. In contents of home care services variables, education & counselling was the most and medication was second. In duration of illness variables, over 10 years was the most. In place of treatment before home care service variables, hospital(57%) was the most. In illness condition after home care variables, 'moderate' was the most and 'much better'(85.5%) was second. In help of home care variables, 'much help'(71.5%) was the most and 'moderate'(28.1%) was second. In contents of counselling variables, treatment method of illness was the most. Home care services center indicated higher level of satisfaction than health center(p<0.001). In opinion of home care frequency per month variables, 'less' was the highest satisfaction level (p<0.001). In duration of illness variables, below one year was the highest and over 10 years was second(p<0.001). In place of treatment before home care service variables, health center was the highest (p<0.001). In illness condition after home care variables 'much better' was the highest and 'worse' was second (p<0.001). I n help of home care variables, 'much help' was the highest (p<0.001). In contents of counselling variables, cause of illness was the highest(p<0.001). According to the 14 items which consisted of 3 point scales the total level of satisfaction of home care service was very high, with total mean score 36. According to the above results, most clients taking home care services are satisfied. However, organization and a fund are required to support high quality home care services to those who need them. Furthermore, a follow-up survey should be accomplished to evaluate the status of clients.
다섯자리 Schiff Base Molybdenum(Ⅴ) 착물들의 합성과 비수용매에서의 전기화학적 성질
김선숙,최주형,최용국,정병구,Kim, Seon Suk,Choe, Ju Hyeong,Choe, Yong Guk,Jeong, Byeong Gu 대한화학회 1994 대한화학회지 Vol.38 No.2
다섯자리 Schiff base의 molybdenum(Ⅴ)착물로써 [Mo(Ⅴ)O(Sal-DET)(NCS)] 와 [Mo(Ⅴ)O(Sal-DPT)(NCS)]들을 Sabat법에 의해 합성하였다. 이들 착물들의 원소분석, IR-spectrum, UV-Vis spectroscopy 및 Thermogravimetric analysis(T.G.A.)곡선으로부터 리간드 대 금속의 몰비가 1:1착물임을 확인하였다. 0.1M tetraethyl ammonium perchlorate(TEAP)지지전해질을 포함한 비수용매에서 순환 전압-전류법과 시차펄스 폴라그래피에 의한 전기화학적 측정으로부터 이들 착물들은 dimer로 형성된 후, 일전자 전이의 확전자 전이의 확산지배적인 환원과정이 다음과 같이 네단계로 진행됨을 알았다. 2Mo(Ⅴ)$\rightleftarrow^{e-}$ Mo(Ⅴ)Mo(Ⅳ) $\longrightarrow^{e-}$ 2Mo(Ⅳ), Mo(Ⅳ)$\longrightarrow^{e-}$ Mo(Ⅲ) $\longrightarrow^{e-}$ Mo(Ⅱ) Pentadentate Schiff base molybdenum(Ⅴ) complexes such as [Mo(Ⅴ)O(Sal-DET)(NCS)] and [Mo(Ⅴ)O(Sal-DPT)(NCS)] were synthesized by Sabat method. The structure of these complexes were identified by elemental analysis, spectroscopy, and thermogravimetric analysis(T.G.A.). It was found that the mole ratio of Schiff base ligand to the complexes was found to be 1 : 1. The redox processes of the complexes were investigated by cyclic voltammetric and differential pulse polarographic technique in nonaqueous solvent containing 0. 1 M tetraethyl ammonium perchlorate(TEAP) as supporting electrolyte at glassy carbon electrode. It was found that diffusion controlled reduction processes of four steps with one electron were 2Mo(Ⅴ)$\rightleftarrow^{e-}$ Mo(Ⅴ)Mo(Ⅳ) $\longrightarrow^{e-}$ 2Mo(Ⅳ), Mo(Ⅳ) $\longrightarrow^{e-}$ Mo(Ⅲ) $\longrightarrow^{e-}$ Mo(Ⅱ)
대한간학회지 제6차 춘계학술대회 초록집 : 구연 ; 만성 B형 간질환에서 Core promoter와 Precore 부위의 변이율, 변이양상 및 임상적 의의
김선숙 ( Kim Seon Sug ),황유진 ( Hwang Yu Jin ),정문기 ( Jeong Mun Gi ),김성권 ( Kim Seong Gwon ),김은아 ( Kim Eun A ),박동균 ( Park Dong Gyun ),권오상 ( Kwon O Sang ),박종재 ( Park Jong Jae ),구양서 ( Gu Yang Seo ),김유경 ( Kim Y 대한간학회 2000 Clinical and Molecular Hepatology(대한간학회지) Vol.6 No.1(S)
사무공간의 조명기구 및 급배기구 배치를 고려한 통합유니트 도출에 관한 연구
김선숙(Kim. Sun-Sook),이규남(Lee. Kyu-Nam),이선우(Lee. Sun-Woo),김지현(Kim. Ji-Hyun),앙인호(Yang. In-Ho),김광우(Kim. Kwang-Woo) 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1
The purpose of this study is to suggest the concept of an 'integrated unit' and to develop integrated units considering the layout of luminaires and diffusers in workspace. Integrated units can be defined as a planning unit which satisfies the environmental comfort criteria of workspace. Integrating process of each unit was proposed by surveying workspace of the domestic and foreign office buildings. Several lighting units and air-conditioning units were developed by visual and thermal simulation, and integrated units for various architectural module which satisfies the visual and thermal comfort criteria were drawn from those units.
건축마감재의 오염물질 방출량 및 환기량에 따른 실내공기질 평가 프로그램(KLAir-E) 개발
김창남(Kim Chang-Nam),김용경(Kim Yong-Kyoung),김선숙(Kim Sun-Sook),강동화(Kang Dong-Hwa),최동희(Choi Dong-Hee),여명석(Yeo Myoung-Souk),김광우(Kim Kwang-Woo) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
Because of the airtightness of buildings or the misuse of building materials, indoor air pollution has been increasingly concerned. Especially, SHS(Sick House Syndrome) and MCS(Multi Chemical Sensitivity) which can have bad influences on the resident in an existing apartment house as well as newly constructed apartment house start to attract public attention. Ventilation was attempted as for the solution to the domestic IAQ problem; however, it may remove the pollutant only after emitted indoors. Therefore, a suitable forecasting tool is needed to estimate the indoor air quality. In this study, we developed the useful program which can estimate the indoor air pollution concentration according to air exchange rate and pollutant emission rate of finishing building materials. Through the comparison between field-measurement in the Mock-up Test and the developed estimation program, the validation of the developed estimation program as the appreciable tool of concentrations was examined. Therefore we expect that this developed program is used in Design step and construction step. In this study, the concentration of Formaldehyde, TVOC(Total Volatile Organic Compounds) was analyzed and used to predicted the indoor concentrations.