• Title, Summary, Keyword: Convergence Research Performance

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Performance of Bipolar Optical Spectral Encoding CDMA with Modified PN Codes

  • Chang, Sun-Hyok;Kim, Bong-Kyu;Park, Heuk;Lee, Won-Kyoung;Kim, Kwang-Joon
    • ETRI Journal
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    • v.28 no.4
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    • pp.513-516
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    • 2006
  • Experimental demonstration of bipolar spectral encoding code-division multiple-access with modified pseudorandom noise codes is presented. Bipolar spectral encoding is achieved with an erbium-doped fiber amplifier amplified spontaneous emission source and arrayed waveguide gratings. The bit-error rate performance of 1.25 Gbps signal transmission over 80 km single mode fiber is measured in a multiple-user environment.

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Channel Protection Layer Effect on the Performance of Oxide TFTs

  • KoPark, Sang-Hee;Cho, Doo-Hee;Hwang, Chi-Sun;Yang, Shin-Hyuk;Ryu, Min-Ki;Byun, Chun-Won;Yoon, Sung-Min;Cheong, Woo-Seok;Cho, Kyoung-Ik;Jeon, Jae-Hong
    • ETRI Journal
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    • v.31 no.6
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    • pp.653-659
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    • 2009
  • We have investigated the channel protection layer (PL) effect on the performance of an oxide thin film transistor (TFT) with a staggered top gate ZnO TFT and Al-doped zinc tin oxide (AZTO) TFT. Deposition of an ultra-thin PL on oxide semiconductor films enables TFTs to behave well by protecting the channel from a photo-resist (PR) stripper which removes the depleted surface of the active layer and increases the carrier amount in the channel. In addition, adopting a PL prevents channel contamination from the organic PR and results in high mobility and small subthreshold swings. The PL process plays a critical role in the performance of oxide TFTs. When a plasma process is introduced on the surface of an active layer during the PL process, and as the plasma power is increased, the TFT characteristics degrade, resulting in lower mobility and higher threshold voltage. Therefore, it is very important to form an interface using a minimized plasma process.

High performance inkjet printed polymer CMOS integrated circuits

  • Baeg, Kang-Jun;Kim, Dong-Yu;Koo, Jae-Bon;Jung, Soon-Won;You, In-Kyu;Noh, Yong-Young
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.67-70
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    • 2009
  • Printed electronics are emerging technology to realize various microelectronic devices via a cost-effective method. Here we introduce high performance inkjet printed polymer field-effect transistors and application to complementary integrated circuits with p-type and n-type conjugated polymers. The performance of devices highly depends on the selection of dielectrics, printing condition and device architecture. The device optimization and performances of various integrated circuits, e.g., complementary inverters and ring oscillators will be mainly discussed in this talk.

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A Study of the Factor of Humanities and Social Science based Convergence Research Performance (인문사회기반 융합연구 성과 영향요인 연구)

  • Noh, Younghee;Lee, Kwang Hee;Jeong, Dae Keun
    • The Journal of the Korea Contents Association
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    • v.18 no.6
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    • pp.667-678
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    • 2018
  • The purpose of this study is to investigate empirically the factors affecting the research results of humanities and social sciences based convergence research. For this purpose, personal characteristics, research environment factor, researcher factor, research team factor, and support agency factor were set as influence factors of convergence research. Survey was conducted for researchers who are conducting research on humanities and social sciences based convergence research. As a result, it was found that factors influencing research on humanities and social sciences based convergence were researcher factor, supporting agency factor, research environment factor(major), and the influence of these factors on convergence research result was 51.6%. The implications of the research results are as follows: First, when performing the convergence research based on humanities and social science, individual factor of the researcher is more important than the factor of the research team in the performance of convergence research. Second, the support organization can improve the convergence research result through continuous management of convergence research results. Third, the research field (major) of the researcher also influences the performance of the convergence research. Therefore, the research field (major) should be considered important in the formation of the convergence research team.

Polymer Dielectrics and Orthogonal Solvent Effects for High-Performance Inkjet-Printed Top-Gated P-Channel Polymer Field-Effect Transistors

  • Baeg, Kang-Jun;Khim, Dong-Yoon;Jung, Soon-Won;Koo, Jae-Bon;You, In-Kyu;Nah, Yoon-Chae;Kim, Dong-Yu;Noh, Yong-Young
    • ETRI Journal
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    • v.33 no.6
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    • pp.887-896
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    • 2011
  • We investigated the effects of a gate dielectric and its solvent on the characteristics of top-gated organic field-effect transistors (OFETs). Despite the rough top surface of the inkjet-printed active features, the charge transport in an OFET is still favorable, with no significant degradation in performance. Moreover, the characteristics of the OFETs showed a strong dependency on the gate dielectrics used and its orthogonal solvents. Poly(3-hexylthiophene) OFETs with a poly(methyl methacrylate) dielectric showed typical p-type OFET characteristics. The selection of gate dielectric and solvent is very important to achieve high-performance organic electronic circuits.

A Study on the Research Performance and Efficiency of Convergence Research Projects sponsored by National Research Council of Science & Technology : A Comparative Study of Convergence Research and General Trust Projects Using DEA (국가과학기술연구회 융합연구사업의 연구성과 효율성에 관한 연구 : DEA를 활용한 융합연구 및 일반수탁사업의 비교분석을 중심으로)

  • Yuk, Hyounggab;Kang, Jaeyeol;Pae, Kibong;Kang, Daeseok
    • Journal of the Korea Convergence Society
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    • v.11 no.3
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    • pp.211-218
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    • 2020
  • This study compared and analyzed the efficiency of the research results of the convergence research project operated by the National Science and Technology Research Council and the general research project carried out by the Government-funded research institute and proposed measures to enhance the efficiency of the operation and management of convergence research. Research data were collected from 21 government-funded research institutes through an information disclosure claim and DEA analysis was conducted for efficiency assessment. The SCI papers of convergence research showed high efficiency, and the patent registration and technology transfer sector showed high efficiency of general research projects. This indicates that convergence research projects for securing lead and original technologies are highly efficient, but their performance is low due to lack of participation by businesses in terms of the utilization of derived technologies, and more companies' participation and opportunities are needed for practical use of convergence research results. Through the analysis of efficiency of convergence research project performance, this study provided policy and guidance for R&D planning for rational investment of limited manpower and research costs. Further, future research on identifying efficiency is proposed depending on the type of technology subject to convergence research as a method for managing convergence research.

A Study on Effective Collaborative Production Processes for Multimedia Convergence Performances (다매체 융합공연을 위한 효율적인 협업제작과정 연구)

  • Kim, Ga-Eun;Park, Jin-Won
    • The Journal of the Korea Contents Association
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    • v.20 no.4
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    • pp.49-61
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    • 2020
  • Recently, the convergence of genre-mixed collaboration and technology-mixed collaboration in performance art strategically fuses different goals and different properties, satisfying anticipated demand, and developing into experimental forms that bring out convergence contents of new value. To supplement problems of convergence attempts and heighten levels of completion, the effective collaborative processes of media experts must be studied and improved. This thesis attempts to study effective collaborative production plans of convergence performance that correspond to the demands of the times through multimedia convergence performance prototypes(Live performance play + Pre-made digital animation). It categorizes performance production processes into pre-production and production and researches the effective collaborative production processes of convergence performances that utilize these two forms of media through work selection, production direction establishment, human resource constituents, production schedule plan establishment, visualization processes, and performance practices and rehearsals. Continuous research must be conducted based on convergence performance contents planning, changes in production methods, and an understanding of distinct characteristics among convergence contents for the industrial development systemization and vitalization of convergence contents to be made possible.

Noise Suppression of Spectrum-Sliced WDM-PON Light Sources Using FP-LD

  • Lee, Woo-Ram;Cho, Seung-Hyun;Park, Jae-Dong;Kim, Bong-Kyu;Kim, Byoung-Whi
    • ETRI Journal
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    • v.27 no.3
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    • pp.334-336
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    • 2005
  • We improved the performance of the spectrum-sliced light source for wavelength-division-multiplexed passive optical networks by employing a Fabry-Perot laser diode(FP-LD). We found that the FP-LDs can suppress the intensity noise as significantly as using a gain-saturated semiconductor optical amplifier. The transmission characteristics were measured and analyzed in both conditions with and without employing an FP-LD.

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Effective Multiplexing Method for Conditional Access System in Terrestrial DMB

  • Lee, Yong-Hoon;Lee, Gwang-Soon;Lee, Jin-Hwan;Ahn, Chung-Hyun;Lee, Soo-In;Kim, Nam
    • ETRI Journal
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    • v.30 no.6
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    • pp.859-861
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    • 2008
  • This letter proposes a conditional access system (CAS) suitable for use in terrestrial digital multimedia broadcasting (T-DMB), based on an effective multiplexing method to provide encrypted T-DMB services. Specifically, the proposed multiplexing method for a CAS is designed to reduce the additional bit rate while assuring easy access to the designated encrypted services. Finally, the performance of the implemented CAS is confirmed through implementation and a broadcasting experiment under various service environments.

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Characteristics of Enhanced-Mode AlGaN/GaN MIS HEMTs for Millimeter Wave Applications

  • Lee, Jong-Min;Ahn, Ho-Kyun;Jung, Hyun-Wook;Shin, Min Jeong;Lim, Jong-Won
    • Journal of the Korean Physical Society
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    • v.71 no.6
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    • pp.365-369
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    • 2017
  • In this paper, an enhanced-mode (E-mode) AlGaN/GaN high electron mobility transistor (HEMT) was developed by using 4-inch GaN HEMT process. We designed and fabricated E-mode HEMTs and characterized device performance. To estimate the possibility of application for millimeter wave applications, we focused on the high frequency performance and power characteristics. To shift the threshold voltage of HEMTs we applied the $Al_2O_3$ insulator to the gate structure and adopted the gate recess technique. To increase the frequency performance the e-beam lithography technique was used to define the 0.15 um gate length. To evaluate the dc and high frequency performance, electrical characterization was performed. The threshold voltage was measured to be positive value by linear extrapolation from the transfer curve. The device leakage current is comparable to that of the depletion mode device. The current gain cut-off frequency and the maximum oscillation frequency of the E-mode device with a total gate width of 150 um were 55 GHz and 168 GHz, respectively. To confirm the power performance for mm-wave applications the load-pull test was performed. The measured power density of 2.32 W/mm was achieved at frequencies of 28 and 30 GHz.