• Title/Summary/Keyword: a nation

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기술 및 수요속성에 따른 정보통신서비스 확산 패턴

  • Kim, Mun-Su;Kim, Ho
    • Journal of Technology Innovation
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    • v.11 no.2
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    • pp.71-89
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    • 2003
  • Since technological innovation, adoption, and diffusion is a fundamental engine for a company's competitiveness and in turn a nation's industrial development, diffusion of technological innovation has been one of popular research themes to many researchers and scholars for decades. Especially, in today's knowledge-based economy, the IT technology became a fundamental infrastructure for a nation and thus their impact on a nation's economy has grown to be tremendous. This paper investigates the patterns of technological diffusion of 16 telecommunications services. Firstly, we identify the optimal diffusion model which represents the 15 IT innovation best in terms of goodness-of-fit. Secondly, based on the best model identified we cluster the 16 IT innovations according to their diffusion characteristics such as penetration rate and diffusion speed. Lastly, we categorize the innovations in terms of technology (voice-based innovation and data-based innovation) and demand (household-use and business-use) attributes, and compare their diffusion patterns and found some meaningful difference in diffusion patterns. We hope the result helpful to corporate managers as well as policy makers in relevant areas.

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On-line optimization of a distillation column (증류탑의 실시간 최적화)

  • Choe, Yong-Jin;Lo, Kyun;Yoon, En-Sup
    • 제어로봇시스템학회:학술대회논문집
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    • 1990.10a
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    • pp.229-233
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    • 1990
  • A new on-line optimization technique of a distillation column is presented. The equation decoupling method and the simultaneous solution method are combined to simulate the distillation process. The storage requirement is small enough to run on a PC. A improved successive quadratic programming is used to find the optimum operating conditions. The optimizer is intensively tested by using the dynamic simulator, SPEEDUP. After this, the technique is applied to a binary distillation column that treats methanol and water.

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An Analytical Model for the Threshold Voltage of Short-Channel Double-Material-Gate (DMG) MOSFETs with a Strained-Silicon (s-Si) Channel on Silicon-Germanium (SiGe) Substrates

  • Bhushan, Shiv;Sarangi, Santunu;Gopi, Krishna Saramekala;Santra, Abirmoya;Dubey, Sarvesh;Tiwari, Pramod Kumar
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.13 no.4
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    • pp.367-380
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    • 2013
  • In this paper, an analytical threshold voltage model is developed for a short-channel double-material-gate (DMG) strained-silicon (s-Si) on silicon-germanium ($Si_{1-X}Ge_X$) MOSFET structure. The proposed threshold voltage model is based on the so called virtual-cathode potential formulation. The virtual-cathode potential is taken as minimum channel potential along the transverse direction of the channel and is derived from two-dimensional (2D) potential distribution of channel region. The 2D channel potential is formulated by solving the 2D Poisson's equation with suitable boundary conditions in both the strained-Si layer and relaxed $Si_{1-X}Ge_X$ layer. The effects of a number of device parameters like the Ge mole fraction, Si film thickness and gate-length ratio have been considered on threshold voltage. Further, the drain induced barrier lowering (DIBL) has also been analyzed for gate-length ratio and amount of strain variations. The validity of the present 2D analytical model is verified with ATLAS$^{TM}$, a 2D device simulator from Silvaco Inc.

An Experimental Study on the Flow Characteristics ofa Supersonic Turbine Cascade as Pressure Ratio

  • Cho, Jong-Jae;Jeong, Soo-In;Kim, Kui-Soon;Lee, Eun-Seok
    • International Journal of Aeronautical and Space Sciences
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    • v.5 no.2
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    • pp.9-17
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    • 2004
  • In this paper, a small supersonic wind tunnel was designed and built to studythe flow characteristics of a supersonic impulse turbine cascade by experiment. Theflow was visualized by means of a single pass Schlieren system. The supersoniccascade with 3-dimensional supersonic nozzle was tested over a wide range ofpressure ratio. Highly complicated flow patterns including shocks, nozzle-cascadeinteraction and shock boundary layer interactions were observed.

근대중국의 사회진화론과 양계초

  • Lee, Yeon-Do
    • 중국학논총
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    • no.65
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    • pp.287-302
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    • 2020
  • Social Evolution was the most influential idea in modern China. Chinese intellectuals, who had made the survival of their country and people a top priority in the face of threats from Western powers, accepted the theory of social evolution as an idea calling for national unity. For Liang Qi chao, the theory of social evolution was a reason to raise the modern nation-state and the new people, along with the need for reform. This article examines that philosophical content and meaning modern Chinese social evolution has around his concept of "nation". His ideas, which are regarded as the origin of Asian nationalism, reflect his belief in and will toward a nation-state, and occupy a unique position in the political history of modern China.

A Study on Improved Vacuum Adsorption Method and Aerodynamics for Wall Climbing Robot (벽면이동 로봇의 진공흡착방식 개선 및 공기 역학에 관한 연구)

  • Shin, Dong-Ho;Park, Jae-Min;Kim, Hyeon-Sub;Kim, Hyung-Hoon;Kim, Sang-Hoon
    • Proceedings of the Korea Information Processing Society Conference
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    • 2019.10a
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    • pp.645-648
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    • 2019
  • 본 논문은 벽면 이동 로봇의 진공흡착 방법 개선에 관한 연구로서, 로봇의 무게에 따른 중력을 견딜고 벽면에 흡착 및 이동할 수 있는 동작 환경을 시뮬레이션을 통해 효율적으로 설계한다. 이동로봇에 미치는 다양한 힘의 조건들을 판단하며 특히 벽의 수직방향으로 미는 힘과 챔버 내의 저압조건 등과의 상관관계를 고려하여 흡착 능력을 개선하기 위한 방법을 제시하고 실험을 통해 성능을 검증하였다 또 한 본 연구에서는 압력센서를 이용하여 실시간으로 압력을 체크 하면서 모터의 속도인 PWM의 한계치를 설정하여 압력에 따라 필요한 임펠러의 속도를 PWM으로 적절히 조절해줌으로써 흡착에 관련된 제어 능력을 개선하고 흡착에 필요한 일정 압력 값에 도달하지 못할 때 작업이 종료되는 기술을 개발하였다.

Art and Collectivity (미술과 집단성)

  • Kwok, Kian-Chow
    • The Journal of Art Theory & Practice
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    • no.4
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    • pp.181-202
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    • 2006
  • "When it comes to art, nationalism is a goodticket to ride with", says the title of a report in the Indian Express (Mumbai, 29 Oct 2000). The newspaper report goes on to say that since Indian art was kept "ethnic" by colonialism, national liberation meant opening up to the world on India's own terms. Advocacy, at the tail end of the 20th century, would contrast dramatically with the call by Rabindranath Tagore, the founder of the academy at Santiniketan in 1901, to guard against the fetish of nationalism. "The colourless vagueness of cosmopolitanism," Tagore pronounced, "nor thefierce self-idolatry of nation-worship, is the goal of human history" (Nationalism, 1917). This contrast is significant on two counts. First is the positive aspect of "nation" as a frame in art production or circulation, at the current point of globalization when massive expansion of cultural consumers may be realized through prevailing communication networks and technology. The organization of the information market, most vividly demonstrated through the recent FIFA World Cup when one out of every five living human beings on earth watched the finals, is predicated on nations as categories. An extension of the Indian Express argument would be that tagging of artworks along the category of nation would help ensure greatest reception, and would in turn open up the reified category of "art," so as to consider new impetus from aesthetic traditions from all parts of the world many of which hereto fore regarded as "ethnic," so as to liberate art from any hegemony of "international standards." Secondly, the critique of nationalism points to a transnational civic sphere, be it Tagore's notion of people-not-nation, or the much mo re recent "transnational constellation" of Jurgen Habermas (2001), a vision for the European Union w here civil sphere beyond confines of nation opens up new possibilities, and may serve as a model for a liberated sphere on global scale. There are other levels of collectivity which art may address, for instance the Indonesian example of local communities headed by Ketua Rukun Tetangga, the neighbourhood headmen, in which community matters of culture and the arts are organically woven into the communal fabric. Art and collectivity at the national-transnational level yield a contrasting situation of, on the idealized end, the dual inputs of local culture and tradition through "nation" as necessary frame, and the concurrent development of a transnational, culturally and aesthetically vibrant civic sphere that will ensure a cosmopolitanism that is not a "colourless vagueness." In art historical studies, this is seen, for instance, in the recent discussion on "cosmopolitan modernisms." Conversely, we may see a dual tyranny of a nationalism that is a closure (sometimes stated as "ethno-nationalism" which is disputable), and an internationalism that is evolved through restrictive understanding of historical development within privileged expressions. In art historical terms, where there is a lack of investigation into the reality of multiple modernisms, the possibility of a democratic cosmopolitanism in art is severely curtailed. The advocacy of a liberal cosmopolitanism without a democratic foundation returns art to dominance of historical privileged category. A local community with lack of transnational inputs may sometimes place emphasis on neo-traditionalism which is also a double edged sword, as re kindling with traditions is both liberating and restrictive, which in turn interplays with the push and pull of the collective matrix.

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A Consideration and Perspective for the Development of Nation's Electronic Components Techniques (우리나라 전자부품기술개발에 대한 발전과 전망)

  • 조규심
    • Journal of the Korean Professional Engineers Association
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    • v.24 no.5
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    • pp.9-14
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    • 1991
  • To date Korean electronic industry has held a position of the first rank both in productions and exports among the nation's industries. However, it is gradually losing its competitive foundation in the world market owing both to the weakening in price competition by least developed among developing countries(LDDC) and to the lack in technological competition with industrially advanced countries. Specifically it is worried about an industrial subordination to industrially advanced countries owing to an evasion of components supply, control of amount of materials, and the evasion of kernel technology transfer etc. As the condition has developed, both the government and the electronic industry in July of this year came to jointly establish a research and development center for electronic components for the purpose of rehabilitating the electronic industry and accordingly strengthen the export industry which has been and continuance to be vital to our nation.

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A Study on the Development of Nation-wide Library Cooperative System Model (국가 통합 도서관 협력 체제 모델 개발에 관한 연구)

  • 한성택
    • Journal of Korean Library and Information Science Society
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    • v.35 no.1
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    • pp.19-49
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    • 2004
  • This study intends to develop a model of nation-wide library cooperative system for Korea. It analyzes and investigates the definitions, types and models of library cooperation; and current status and problems in operations of major cooperative systems in Korea and other nations. There are some cooperative systems such as cooperative system for public libraries operated by the National Library of Korea and other systems based on their regions or library types in Korea. New model of nationwide cooperative system can improve library functions through many cooperative plans.

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A Study on DSM Screening Model in Nation-wide Perspective (국가적 관점에서 본 전력수요관리 심사모델에 관한 연구)

  • Yu, Ji-Sang;Park, Jong-Sung;Chang, Seung-Chan;Kim, Jung-Hoon
    • Proceedings of the KIEE Conference
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    • 1996.07b
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    • pp.781-783
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    • 1996
  • An important purpose of screening DSM(Demand Side Management) programs is to determine which programs or technologies seem to be moot worthy of further development, given the characteristics of the particular utility system. Complication found in screening DSM technologies is the consideration of costs and benefits from several perspectives : the utility, society, participants, free riders and nonparticipants. In this paper, a nation-wide DSM screening model is presented using a rigorous mathematical formulation on the financial basis and the concept of marginal coots considering all affected parties inside the nation is fully exploited.

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