• 제목/요약/키워드: characteristic period

검색결과 1,309건 처리시간 0.033초

DC sputtering법을 이용한 Al/AlN/Si MIS capacitor 제작 및 수소첨가가 전기적 특성에 미치는 영향 (Effect of hydrogen addition to use DC sputtering method on the electrical properties of Al/AlN/Si MIS capacitor fabrication)

  • 김민석;권정열;김지균;이헌용;이환철
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1999년도 하계학술대회 논문집 D
    • /
    • pp.1919-1921
    • /
    • 1999
  • AlN thin films were fabricated by sputter for the application of MIS device with Al/AlN/Si structure. We controled that sub-temperature room-temperature. Sputtering pressure 5 mTorr, flow ratio Ar:$N_2$=1:1(4sccm:4sccm), and appended hydrogen gas $0{\sim}5%$. AlN thin films thickness fabricated to maintain $2700{\AA}$ time control. Before the experiment remove to the contaminated material use the Ultrasonic every 10 minute use the acetone and ethanol, then use the HF remove oxide-substance at 10 second. To analyze characteristic of the $H_2$ gas addition period, C-V and I-V characteristic make and experiment $H_2$ gas at addition period progressive capability of I-V and C-V characteristic.

  • PDF

개항(開港) 이후(以後) 대구지역(大邱地域) 근대주거건축(近代住居建築)에 관한 연구(硏究) (A Study on the Modern Domestic Architecture in Taegu Area after the End of the 19th Century)

  • 윤재웅
    • 건축역사연구
    • /
    • 제1권2호
    • /
    • pp.85-100
    • /
    • 1992
  • This Study is to analize the transfiguration of the domestic architecture in the process of modernization. Thirty two houses which were located in Taegu province and constructed during the period from 1886 to 1945, were surveyed and analized about the characteristic and their transfiguration. The modern domestic architecture of Taegu province had been constructed greatly by the missonaries and Japanes. The history of development of modern houses in Teagu province can be devided into three period in accordance with the economic policy, housing style and the method of construction. The first period (1886-1910) was the beginning of the modern house. Most of the mission houses of that period were made with brick structure of korean-western style or colonial style. In the second period (1911-1926), colonial, Japanese-western, Japanese housing style were co-exited in Teagu province. During the third period (1927-1945) new method of construction using reinforced concrete and mortar was introduced, therefore the houses become row house (a two or three-family house) and much simpler.

  • PDF

에도시대 정인(町人) 남자복식에 관한 고찰 (A Study on the Men's Costume of $Ch{\check{o}}nin$ in Edo Period)

  • 박옥련
    • 한국생활과학회지
    • /
    • 제11권2호
    • /
    • pp.177-188
    • /
    • 2002
  • The purpose of this study was to appreciate Japanese clothing and ornament of the men's costume that showed a unique style of Japan as well as a mixture of foreign civilization in Edo period. The data related clothing, ornament and art of Japan were collected from books and slide films that had been studied in Japan, because the data studied in Korea were not enough. The results were as follows: First characteristic is. the dualism. The dualism was shown in the social class, estheticism and originality. In terms of the social class, the feudalism remained through their heraldry or mark of organization even though it was broken down. In terms of estheticism, it showed the coexistence of gorgeousness and plainness. In terms of the originality, it showed the coexistence of original Kosode and Kappa under the influence of Southern barbarians' mode. Second characteristic is the utility. $Ch{\check{o}}nin$ was needed to the functional clothing because of Its social position that had much activity. Therefore, the utility was shown in a simple silhouette of Haori and Hanten and in its way of wearing.

  • PDF

장기저장 미곡의 품질 특성 (Characteristic of the Rice Quality with Long-term Storage of Paddy)

  • 소규호;김영수;홍재식;정준영;조재민
    • 한국식품영양학회지
    • /
    • 제13권1호
    • /
    • pp.21-27
    • /
    • 2000
  • In order to investigate the changes of rice qualities during 4 years storage of paddy in warehouse of normal temperature condition. As storage period go by, head ratio was deduced and broken rice was increased according as a change of temperature during the long term storage. A color of rice was became more dark gray than that of entering time as L value was decreased from 64.07 to 61.62 a 4 years late. As a results of studies on the cooking quality of milled rice, water uptake ratio and expanded volume were increased in proporation to storage period, wherease total solids and iodine blue value were decreased. In the characteristic of texture of cooked rice, viscosity/hardness ratio(-H/H) had a decreasing tendency, while adhesiveness and cohesiveness increased with increased storage time. The qualities of cooked milled rice studied were sensory attributies of odor, taste, stickiness and appearance which were evaluvated by multiple comparsion method. The sensory results showed that all of descriptions were deterirated with a increased storage period. The taste and stickiness were changed from good score to bad score a 2 years later.

  • PDF

망외부성이 존재하는 상품에 대한 독점 기업의 수직차별화 전략 분석 (Analysis of Vertical Differentiation Strategy of a Monopolistic Company under Network Externality)

  • 조형래;이민호
    • 산업경영시스템학회지
    • /
    • 제41권2호
    • /
    • pp.159-166
    • /
    • 2018
  • The proliferation of information technologies made it possible to produce information products of different versions at much lower cost comparing to traditional physical products. Thus it is common for information product manufacturers to consider vertically differentiated product line for more profit through improved market coverage. Another salient characteristic of most information product is network externality. Existing researches dealing with vertical differentiation and network externality usually assumed oligopolistic market where vertically differentiated products are provided by competing companies, respectively. Moreover, they analyzed the essentially dynamic characteristic of network externality statically. In this study, different from the previous researches, the vertical differentiation strategy of a monopolistic company under network externality is dynamically analyzed. We used a two-period model to accommodate the dynamic feature of network externality. Based on the two-period model, the profit maximizing solutions are analyzed. The results showed that a monopolistic company has no incentive to differentiate products vertically when the network externality is absent. On the contrary, when the network externality exists, the monopolistic company can derive more profit by vertically differentiating the product line. It is also shown that, for more profit, the monopolistic company should keep the quality difference between the high quality product and the low quality product as greater as possible.

2000년 이후 패션소재에 나타난 친환경 경향과 그 특징 (The Characteristic of Eco-friendly Trend in Fabric since 2000)

  • 김지선;염혜정
    • 패션비즈니스
    • /
    • 제17권4호
    • /
    • pp.75-89
    • /
    • 2013
  • In 2000s, the interest of ROHAS has been increased and the environmental problem has begun to be discussed as the environmental and global value, not the individual perspective. And the standard of value for eco-friendly awareness has been expanded to the economic category. The trend of eco-friendly fabric can be divided into 3 periods depending on the property. The period for natural fabric with visual effects(2002~2004) can be summarized as the creation of natural shape using the natural image, the interaction of cotton and the technology from the visual perspective. In the period of functional conjunction with eco-friendliness and technology(2005~2008), the eco-friendly awareness through the conjunction of technology and nature and the re-cycling, and the responsibility to the environment had been increased. In the period of sustainable development for nature and environment(2009~2011), it showed the conjunction with nature and the integration with technology and eco-friendly issues. Therefore, the characteristic of eco-friendly trend in fabric since 2000 can be said; firstly, the high-quality fabric has been developed with technological development for the functional progress. Secondly, the ethical creativity has been displayed with the development and utilization of eco-friendly recycling materials. Thirdly, the materials reflected with eco-friendly issues have emerged.

한국 철도차량 창호유리의 기능적 변천에 대한 고찰 (A study on the functional transition of Korean rolling stock's window pane.)

  • 이흥재;장대성
    • 한국철도학회:학술대회논문집
    • /
    • 한국철도학회 2009년도 춘계학술대회 논문집 특별세미나,특별/일반세션
    • /
    • pp.323-337
    • /
    • 2009
  • This paper researched the adiabatic characteristic, safety and sound insulation characteristic of rolling stock window pane type and transition process of korean train vehicle window glass, and also including investigating a hereafter course of development. The window pane have provided the romantic feeling and the external scenery of train travel to the passenger in period of korea 110 year railway history. From the adiabatic viewpoint, this paper reviewed heat conductivity(U-value) and solar factor according to window pane type, including the safety and sound transmission loss of window pane.

  • PDF

지식산업센타 입주자 만족 요인 연구 -자가입주/임대입주 및 입주기간별 고객특성그룹 중심으로- (A Study on the Effect of Customer Satisfaction Factors by Customer Characteristic Group)

  • 김재태;김종원
    • 한국콘텐츠학회논문지
    • /
    • 제16권9호
    • /
    • pp.423-432
    • /
    • 2016
  • 본 연구는 지식산업센타 입주자 고객의 만족도에 영향을 미치는 요인, 즉 접근성요인, 제도적요인, 경제적요인, 주변환경요인, 사업요인, 시설요인 등이 입주자의 만족도에 미치는 영향을 연구하였다. 연구결과는 입주자 고객 전체그룹에서는 주변환경요인을 제외한 나머지 요인 전부가 만족에 유의하게 영향을 미치는 것으로 나타났으며 접근성과 경제적 요인이 상대적으로 높은 영향을 보였다. 입주자 특성에 따른 입주자 특성 그룹별 분석(자가/임대 : 2개 그룹, 입주기간 5년 미만그룹, 5년~10년 그룹, 10년 이상 : 3그룹 등 5개 특성그룹)에서는 접근성이 4개 그룹에서 상대적으로 높게 나타났다. 또한 경제적요인과 사업, 제도, 시설 등의 요인은 각 특성 그룹에서 다양하게 유의한 영향을 미치는 것으로 나타났으며 입주자의 만족에 미치는 영향은 회귀계수 0.20~0.27 범위내의 수준이었다. 본 연구결과에 따라 지식산업센터의 효율적인 운영을 위해서는 접근성을 우선적으로 고려하고 그 다음으로 입주자 특성 그룹별의 만족도 요인을 고려하는 전략이 필요하다.

제주도지방의 선사문화와 동굴${\cdot}$바위 그늘 주거지 (A preliminary study of prehistoric tunnel-dwelling sites and rock-shelters in Che-Ju Island, Korea)

  • 이청규;강창화
    • 한국제4기학회지
    • /
    • 제1권1호
    • /
    • pp.47-67
    • /
    • 1987
  • 우리나라 구석기시대에 보편적인 것으로 알려진 동굴입구나 움푹 들어간 바위절벽밑의 바위그늘을 이용한 주거지 유적이 제주도 신석기시대 이후까지 상당한 기간 지속되었음이 발견되었다. 그러나 그후 청동기시대에서 철기시대에 이르러 이러한 주거지는 캠핑지역으로 변한 증거가 있다. 그런데 제주도에는 해안가와 하천에 따라 동굴입구 또는 용암턴넬이 많이 발달하여 화산도로서의 특징이 있으며 이들이 선사시대의 인류에 의하여 사용된 것이 특기할 만하다.

  • PDF

한국근대만화의 예술적 특징에 관한 연구 - 1900년대 초부터 1945년까지 작품의 조형적 측면을 중심으로 - (A Study on Artistic Characteristics of Korean Modern Cartoon - Centering on the field of modeling in the period from the early 1900's till 1945 -)

  • 김종옥
    • 만화애니메이션 연구
    • /
    • 통권10호
    • /
    • pp.33-53
    • /
    • 2006
  • 본 논문에서는 한국 근대사회 대중문화의 신총아(新寵兒)로 자리매김 된 만화의 특징을 분석하고 그 사회적 의미를 밝혀 한국만화의 역사적 위상 정립을 위한 연구를 목적으로 하였다. 만화가 학문으로서 연구 영역을 확대하고, 한국 사회 속에서 독특한 대중문화장르로 자리매김하기 위해서는 태동기부터 한국만화가 갖는 역사적 위상을 고찰하고 정립해 나가는 것이 필요하다. 만화는 시각문화로 문맹률 높던 근대한국사회에서 커뮤니케이션 매체의 목적을 훌륭하게 실현한 장르였다. 이 시기 근대만화의 등장은 격변기(激變期) 대중을 계도(棨導)하며 주권회복운동을 펼쳐 나갔던 개화파 지식인들에게 중요한 선전 ${\cdot}$ 교육의 도구였으며, 역으로 친일의 수단이 되기도 하였다. 또 영리를 목적으로 매체를 운영하던 신문사(출판사)들에게는 중요한 독자 확보의 수단이었다. 이러한 측면에서 본 논문은 1900년대 초반부터 1945년 일제강점기에서 해방을 맞는 시기까지를 한국만화의 태동기로 보고 그 특징을 밝혀 보고자 한 것이다.

  • PDF