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      • KCI등재

        압력에 안정한 3분할 FFS 모드의 화소 설계에 관한 연구

        김미숙,신승민,정연학,김향율,김서윤,임영진,이승희,Kim, Mi-Sook,Seen, Seung-Min,Jung, Yeon-Hak,Kim, Hayng-Yuil,Kim, Seo-Yoon,Lim, Young-Jin,Lee, Seung-Hee 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.7

        We studied the external pressure-stable advanced frnge field switching (FFS) pixel design with 3 slit sructue. In this mode, a patterned pixel slit is partitioned into 3 areas, namely, two edges and a center, where the edge slit angle is larger than the center slit angle. Thus the reverse twist region in the pixel edge is reduced comparing to the conventional FFS mode so that the LC dynamics in this region becomes very stable. And also, when the external pressure is applied to the panel at the high voltage, the disclination lines (DLs) were barely intruded into active area. Therefore, the structure is use for the pen based system such as the tablet personal computer (PC), personal digital asistant (PDA).

      • KCI등재

        FFS 모드에서 러빙 방향에 따른 Reverse Twist 변화에 대한 연구

        김미숙,신승민,정연학,김향율,김서윤,이승희,Kim Mi Sook,Seen Seung Min,Jung Yeon Hak,Kim Hyang Yul,Kim Seo Yoon,Lee Seung Hee 한국전기전자재료학회 2006 전기전자재료학회논문지 Vol.19 No.2

        We studied on the reverse twist near the pixel edge depending on the rubbing direction for the fringe field switching (FFS) mode. Liquid crystal (LC) dynamic and the transmittance near the pixel edge, where the various field directions are generated, depend on the initial rubbing direction because the position of reverse twist is decided by the angle between the electric direction and the LC director at a bias voltage. For example, when the rubbing angle is $7^{\circ}$, the reverse twist appears on the bottom position of the right sharp comer of the pixel edge so that the reverse region exists far away from main active region. But, when the rubbing angle is $-7^{\circ}$, the reverse twist appears on the top position of the right sharp comer of the pixel edge, resulting that the region becomes more close to the main active area and the unstable disclination lines (DLs) easily intrude into the active region. Therefore, it is necessary to keep the reverse twist region far from the active region and it is possible by controlling the rubbing direction in the design of a pixel electrode.

      • KCI등재

        FFS 모드에서 Reverse Twist가 구동전압에 미치는 영향에 관한 연구

        김미숙,정연학,신승민,김향율,김서윤,임영진,이승희,Kim, Mi-Sook,Jung, Yeon-Hak,Seen, Seung-Min,Kim, Hyang-Yul,Kim, Seo-Yoon,Lim, Young-Jin,Lee, Seung-Hee 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.11

        We have studied on the effect of the operation voltage according to the reverse twist for the different fringe field switching (FFS) structure. The FFS structure with a vertically patterned edge of the pixel electrode (VPP) has lower operation voltage comparing to the one with a horizontally patterned edge of the pixel electrode (HPP). The reason is like that the number of the pattern of the pixel edge for the VPP structure is one third comparing with the HPP structure and thus, there is small reverse twist area for the VPP structure. Actually, the reverse twist disturbs the twist of LC near adjacent active area, result that LCs near there have the unstable dynamics. That is, the operation voltage increases as the reverse twist area increases. Therefore, it is very important to design pixel electrode with a small reverse twist region for the FFS mode.

      • KCI등재

        TN 모드와 FFS 모드에서 Pretilt Angle이 전기 광학 특성 및 동력학 안정성에 미치는 영향에 관한 연구

        김미숙,정연학,김향율,김서윤,이승희,Kim, M.S.,Jung, Y.H.,Kim, H.Y.,Kim, S.Y.,Lee, S.H. 한국전기전자재료학회 2004 전기전자재료학회논문지 Vol.17 No.11

        We studied on the electro-optic characteristics and dynamic stability according to an undesirably defined pretilt angle induced in high step coverage of pixel area for the Twisted Nematic (TN) / Fringe-Field Switching (FFS) mode. In case of the TN mode, LC directors twist reversely near the edges of thin-film-transistor and black matrix where the pretilt angle of the LC is not well defined. Therefore, the voltage-dependent dynamics of the LC in TN mode is unstable and shows the bad electro-optic characteristics. On the other hand, in case of the FFS mode, the LCs are twisted parallel to the bottom substrate by fringe electric field and the electro-optic characteristic is not influenced by the pretilt angle of the LC which is not well defined.

      • KCI등재

        한국 여성노동력의 성격변화와 노동정책: 1960-2000

        김미숙(MiSook Kim) 한국인구학회 2006 한국인구학 Vol.29 No.1

        본 연구의 일차적 목적은 지난 40년간 일어난 초고속 경제성장의 경험에 유념하면서 한국 여성노동력의 성격변화와 그 대응양식으로서 노동(관련)정책을 해당 정권별(박정희-전두환-노태우-김영삼-김대중)로 구분하여 살펴보는 것에 있다. 60년대 초반 산업화 도입기부터 역대 정권은 각기 다른 모습으로 여성노동력을 저임금-단순-미숙련-산업인력으로 주변화시켜 왔음을 관련자료를 통해서 확인할 수 있었다. 구체적으로 60년대 산업화 초기에는 노동집약적 산업에 저임금 산업인력으로, 70년대 중화학공업 육성기에는 저임금을 특징으로 하는 전통적 여성직종에 집중배치되었다. 80년대 들어서는 의류 전자 신발 등의 업종으로부터 집단해고 또는 대량감원의 대상으로 전락하였다. IMF 경제위기 전후 90년대는 비정규직 노동의 확산과 고용불안정 혹은 실업이 한국 여성노동의 현실에 충격을 주어 여전히 그 영향력에서 벗어나지 못한 상태에 놓여있다고 하겠다. 한편 정부 측의 다양한 대응양식으로서 노동(관련) 정책이 제안되고 있으나, 불합리한 노동 현실의 근본적인 대안으로 평가되기에는 역부족이라고 말할 수 있을 것이다. This paper tries to explore the overall profile of Korean female labor force over the period of 1960-2000. A particular emphasis is put on portraying major over-time characteristics of female labor force, following five different political regimes--that of Park, J.H .(1960 and 1970s), of Chon D.H. (early and late 1980s), of Roh T.W. (late 1980-early 1990s), of Kim,Y.S. (early 1990-late 1990s), and of Kim. D. J. (late 1990-early 2000s), respectively. Discussions have centered around: 1) utilization of young single girls from rural areas during the early industrialization process of 1960-1985; 2) the beginning of married women's entry into labor market and issues of the so-called "M-curve" thesis in Korean experiences since 1990s; 3) the emergence and enlargement of non-regular workers; and 4) the launching of labor related legal measures such as the Equal Employment Act of 1988 and its successive revisions, the Maternity Leave Acts, the On-the-Job Childcare Centers, and the prohibition of sexual harassments on the job setting, and so on. All in all, although it is undeniable that the Korean female labor force has experienced much progress over the period of time in terms of "equality and protection" issues, overall industrial reality we are facing with has not been so prosperous in the sense that most women workers have become the victims of industrial polarization, as time goes by.

      • KCI등재후보

        낙동강 부영양화와 수질환경요인의 통계적 분석

        김미숙,정영륜,서의훈,송원섭,Kim, Mi-Suk,Chung, Young-Ryun,Suh, Euy-Hoon,Song, Won-Sup 한국조류학회(藻類) 2002 ALGAE Vol.17 No.2

        Influences of vrious environmental factors on the eutrophication of Nakdong River were analyzed statistically using water samples collected from 1 January, 1999, to 30 September, 2001 at Namji area. The relationships between the concentration of chlorophyll α (eutrophication index) and environmental factors and were analyzed to develop a statistical model which can predict the status of eutrophication. The concentation of chlorophyll α ranged from 66.2 mg · $m^{-3}$ to 70.8 mg · $m^{-3}$ during dry winter season and the average concentration during this study period was 35.5 mg · $m^{-3}$ Namji area of Nakdong River was in the hypereutrohic stage in terms of water quality. Stephanodiscus sp. and Aulacoseria granulata var. angustissima were dominant species during the witnter to spring time and summer to autumn period, respectively. Based on the correlation analysis and the analysis of variance between chlorophyll α concentration and environmental factors, significantly high positive relationships were found in the order of BOD> pH> COD > KMnO₄ consumption > DO > conductivity > alkalinity. In contrast to these factors, significantly negrative relationships were found as in the order of $PO₄^{3-}-P$ >water level>the rate of Namgang-dam discharge > NH₃-N> the rate of Andong-dam discharge> the rate of Hapchoen-dam discharge. Based on the factors analysis of environmental factors on the concentration of chlorophyll α, we obtained five factors as follows. The first factor included water level, pH, turbiditiy, conductivity, alkalinity and the rate of Namgang-dam discharge. The second factor included water temperature DO, NH₄+-N, NO₃- -N. The third factor included KMnO₄ consumption COD and BOD. The fourth factor included the rate of Andong-dam discharge, the rate of Hapcheon-dam discharge, and the rate of Imha-dam discharge. The final factor included T-N T-P and $PO₄^{3-}-P$ > concentration. We derived two statistica models that can predict the occurrence of eutrophication based on the factors by factor analysis, using regression analysis. The first model is the stepwise regression model whose independent variables are the factors produced by factor analysis : chl α (mg · $m^{-3}$ = 42.923+(18.637 factor 3) + (-17.147 factor 1) + (-12.095 factor 5) + (-4.828 factor 4). The second model is the alternative stepwise regression model whose independent variables are the sums of the standardized main component variables:chl α (mg · $m^{-3}$ = 37.295+(7.326 Zfactor 3) + (-2.704 Zfactor 1)+(-2.341 Zfactor 5).

      • KCI등재

        곡면에 부착 가능한 GPS/GLONASS 마이크로스트립 능동 안테나

        김미숙,손석보,주한기,배준성,김준오,Kim, Mi-Suk,Son, Seok-Bo,Joo, Hahn-Kie,Bae, Joon-Sung,Kim, Joon-O 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.1

        In this paper, dual-feed circularly polarized microstrip patch antenna for GPS L1, GPS L2, GLONASS L1 signal was fabricated by using stacked patch. It was fed by dual coaxial probe on the patch at 50ohm impedance, and was simulated to resonate at GPS L1, GPS L2, GLONASS L1. To realize characteristics of right hand circular polarization using dual-feed stacked patch antenna and hybrid coupler for $90^{\circ}$ phase difference. Output of hybrid coupler was contacted input of Low Noise Amplifier(LNA). The LNA using dual band pass filter was designed and fabricated. The measured results of the implemented antenna is VSWR < 1.5 : 1 and the gain of 32dB(Zenith) over at GPS L1, L2, GLONASS L1.

      • KCI등재후보

        토지정책 추진체계 변화 연구

        김미숙,윤정란,박상학,Kim, Mi-Suk,Yun, Jeong-Ran,Park, Sang-Hak 한국토지주택공사 토지주택연구원 2011 LHI journal of land, housing, and urban affairs Vol.2 No.4

        본 연구는 토지이용을 둘러싼 정책 환경변화에 따라 우리나라의 토지정책 추진체계의 변화가 필요한 시점에서 지금까지 우리나라 토지정책추진체계를 분석하고 향후 방향을 제시하고자 하였다. 이를 위해 1960년대 이후부터 최근까지 시대별 유형별로 우리나라 토지정책의 변화에 따라 토지정책의 추진체계가 어떻게 변화하였는지 추이를 살펴보았다. 분석결과 우리나라 토지정책 추진체계의 특징은 첫째, 1960년대 이래 최근까지 대규모 및 신속한 개발을 뒷받침하는 방향으로 정립되어 왔다. 둘째, 경제개발이후 우리나라의 토지정책 추진체계는 영역별로 전문화를 이루어왔지만, 개발과 보전이 조화를 이룰 수 있도록 통합적 관리를 위한 조직체계는 부족했다. 셋째, 토지이용관련 중앙정부의 권한을 지방에 이양 및 토지개발에서 민간 및 주민참여를 확대해왔다. 넷째, 토지와 관련된 정보 관리 목적이 조세징수에서 점차 토지시장 관리, 계획적 토지이용이라는 측면으로 강조점이 변화되어가고 있는데, 계획적 이용과 관리에는 부합하지 못하고 있다. 본 연구의 시사점 및 향후 추진체계의 개편 방향은 첫째, 토지이용을 둘러싼 여건변화 및 외국의 사례를 볼 때 토지수요가 안정화될 가능성이 높으므로, 대규모 개발 중심의 추진체계에서 탈피할 필요가 있다. 둘째, 향후 인구감소 및 기후변화 등으로 토지자원의 효율적 이용 및 보전적 토지이용이 중요해질 것이므로 이에 대응할 수 있는 추진체계가 필요하다. 셋째, 다양한 주체의 참여 확대와 실질적인 역할을 할 수 있는 방안이 필요하다. 넷째, 토지정보관리를 통합적 체계적으로 구축할 수 있는 추진체계 정비가 필요가 있다. The goal of this research is to suggest the desirable directions of the land policies implement system based on analysis of existing those of Korea with the paradigm shift of land policies. We classify the land policies into land ownership, land use, land development and land management ones, and then analyze their implement system characteristics. The results are follows : firstly, the land policies implement systems have been set to large scale and rapid development. Secondly, although the systems have been specialized by their areas, the comprehensive manage systems for the harmony between development and conservation are lacking. Thirdly, the parts of the central government powers related to land use has been hand covered to local governments. And the participations of residences private companies have enlarged in the land development. Fourthly, the purposes of the information management on land use have been changed from tax collection into planned land use, but the information management has not met the need of planned land use. This study shows that firstly, the implement system focusing on large development projects might be no longer effective because of high possibility of the property prices stabilization, so moderately small ones must be found. Secondly, the system cope with the climate change and to realize the efficient utility of land is needed. Thirdly, it is necessary to take the actual measures to participate a variety of subjects. Fourthly, the system modification of the land information manage system as land policies infra is also needed to establish integral land policies.

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