• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.1
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• pp.15-20
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• 2019

Due to evolving IoT technologies, the various application services using clothing, sport equipment, and wearable devices equipped with extream small communication devices have been actively developed. On the other hands, since these serveices requires long distance communications, Long Distance wireless communication technology LPWAN Research has been proceeded due to limitation of the commuication distance of Wi-Fi and Zigbee which were considered as representative technologies for IoT. Iin this paper, we introduces LoRa technology in detail, which is a non-band network technology among LPWAN technologies, and investigates the use cases of domestic as well as international countries.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.8
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• pp.167-171
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• 2014

While the development of a portable plate panel display, thinning, high color reproduction, high brightness studies have been actively performed. LED, OLED is used as a light source. The research on quantum dot is much accomplished by the material of light source. Such quantum dot is the next generation semiconductor nano fluorescent substance because quantum dot has the high color reproduction and flexible display characteristic. In this study, we presented to method of using the quantum dot for implementation of the plate panel display. Quantum Dot (CdSe/ZnS), having a 100um thickness, is spread in PET barrier film. A Blue LED having a wavelength of 455nm as a light source irradiating light to the optical characteristic of the devices produced and evaluated. Also we presented the possibility for application with the color change film of the LCD.

• Journal of Korean Society of Archives and Records Management
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• v.14 no.3
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• pp.55-82
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• 2014

The objective of this research is to show the possibilities of emulation strategy in the long-term preservation for the digital components of Korean public agencies. First, this study analyzed four major emulation projects that were conducted in the world, such as CAMiLEON, KB, Planets and KEEP. Second, it compared the three different emulation approaches, such as device emulation, OS emulation and application emulation. Third, it searched all the digital components that one public agency produced during the last six years. Through the search, this study found out that the HWP and XLS format files comprised around 90% of the files. Fourth, it examined the functionalities of the formats, which may have been lost when the format was converted to PDF/A. Last, this study introduced the two prototype emulators for the National Archives of Korea. One is a type of OS emulator, while the other is a type of application emulator.

• Journal of the Institute of Electronics and Information Engineers
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• v.49 no.10
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• pp.187-193
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• 2012

Digital X-ray image detector has been applied for medical and industrial fields. Photoconductors have been used to convert the X-ray energy to electrical signal on the direct digital X-ray image detector and amorphous selenium (a-Se) has been used as a photoconductor, normally. In this work, we use 2-dimensional device (2-D) simulator to study about physical phenomena in the a-Se, when we irradiate electromagnetic radiation (${\lambda}=486nm$) on the a-Se surface. We evaluate the electron-hole generation rate, electron-hole recombination rate, and electron/hole distribution in the a-Se using 2-D simulator. This simulator divides the device into triangle and calculates using interpolation method. This simulation method has been proposed for the first time and we expect that it will be applied for the development of digital X-ray image detector.

• Journal of The Korean Association of Information Education
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• v.16 no.3
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• pp.327-336
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• 2012

The Korea government has recently announced "A Master Plan for Smart Education", including application of digital textbooks and composition of education system using cloud computing. Our education system in future circumstance, over the conventional e-learning methods, needs the smart education solutions which enable students to study and communicate on various types of devices. The ongoing government project related with the digital textbook has been performed as mid- and long-term goals, whereas PDF-based e-textbook project, similar to e-book model and, has been already completed for the short-term goal. For the purpose of improved future smart education circumstance, however, a specific strategy is required in the following areas: flexibility of format conversion and independency of original text sources among the multiple device platforms. Therefore, in this paper, we propose a standardization scheme for e-textbook format based on e-book structure. To do this, we survey trends in e-book technologies, and research on standardization of e-book format for digitalization of textbooks, based on the analysis of existing textbooks. Moreover, we produce an example e-book content using our proposed standard method. As a result, our approach can be applied to the future smart education circumstance, and we may say that it will be efficiently applicable to the long-term digital textbook project.

• Journal of the Korean Chemical Society
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• v.45 no.4
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• pp.351-356
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• 2001

Planarization of the free-standing diamond film surface as smooth as possible could be obtained by using the hydrogen plasma etching with the diffusion of the carbon species into the metal alloy (Fe, Cr, Ni). For this process, we placed the free-standing diamond film between the metal alloy and the Mo substrate like a metal-diamond-molybdenum (MDM) sandwich. We set the sandwich-type MDM in a microwave-plasma-enhanced chemical vapor deposition (MPECVD) system. The sandwich-type MDM was heated over ca. 1000 $^{\circ}C$ by using the hydrogen plasma. We call this process as the hydrogen plasma etching with carbon diffusion process. After etching the free-standing diamond film surface, we investigated surface roughness, morphologies, and the incorporated impurities on the etched diamond film surface. Finally, we suggest that the hydrogen plasma etching with carbon diffusion process is an adequate etching technique for the fabrication of the diamond film surface applicable to electronic devices.

• The Magazine of the IEIE
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• v.11 no.5
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• pp.42-50
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• 1984

국내의 다음세대 컴퓨터 개발을 위한 VLSI 설계와 CAD 분야에 대한 연구 방향을 제시한다. 연구의 목표는 국제적으로 경쟁할 수 있는 VLSI 설계능력과 백만개 정도의 트랜지스터로 자성된 회로를 경제적으로 설계하기 위한 CAD 기술과 System의 확립이다. ·새로운 회로 구조와 알고리즘에 대한 연구 · CAD 도구와 언어의 개발에 관한 첨단 CAD 기술개발연구 · VLSI 설계에 필요한 CAD 도구 이용과 개발에 필요한 표준 인터페이스, 네트워킹, 컴퓨팅 하드웨어. 시스템 소프트웨어에 대한 연구등의 부분으로 크게 나눌 수 있다. 이용 가능한 CAD system을 평가하고 개선하며 첨단 CAD에 대한 소프트웨어와 하드웨어에 대해 · 컴퓨팅 하드웨어 · 프로그램 분위기 · 네트워킹 능력 ·자료 교환을 위한 표준인터페이스 등에 관해 조사분석도 병행한다. CAD에 관한 세부적인 연구 과제는 · 시스템 사양언어 · 설계 검증 ·시스템시뮬레이션· 설계 합성 · 설계 해석· 설계 방법론·디바이스와 공정 모델링 프로그램 등이다. 고속 계산용 VLSI에 관한 구조와 알고리즘은 행렬 계산을 위한 ·분산 배열 처리 회로 ·시스토릭 (Systolic) 배열 회로 ·셀률라(Cellular) 논리 회로 · 3차원 배열 회로 와 · 비규칙적 계산 알고리즘을 갖는 VLSI가 있다. VLSI설계훈련과 CAD 기술 축적을 위해 CAD enter를 설립하여 전국적인 CAD 네트워킹을 관계 연구소와 여러 대학에 가설하며, MPC 계획을 추진한다. VLSI설계 가능성이 입증되면 VLSI 설계능력을 더욱 향상 시키기 위해 0.5∼1.0mm기술의 silicon faundary를 설립한다. 연구 개발 조직은 대학, 산업체. 연구소가 삼위일체가 되어 수행될 수 있도록 연구 개발 위원회를 설치 운영하며 경쟁적이며 경제적으로 연구 업무를 집행하는 것이 바람직하다.았다.형질에 관여하는 귀전자에 미치는 기구에 대하여 검토할 여타가 있다고 보여진다. 분해능의 특징으로 미루어 앞으로는 레이저를 이용한 계측 방법이 그 주류를 이룰 것으로 사료된다. 우선 본 해설은 기체의 온도 및 농도의 광학적 측정방법중 Raman산란광 검출법에 대하여 실제로 측정하는 입장에서 간단히 소개한다.lity)이, 높은 $GA_3$함량에 기인된다'는 주장은 본실험(本實驗)으로 부인(否認)되었다. 따라서, 응용학적(應用學的) 측면에서 고려해 볼 때, 리베스식물(植物)의 육종기간 단축을 위한 모든 화아분화(花芽分化) 촉진 조치는 P.J.-식물(植物)이 20. node이상 생육하였을 때 취하는 것이 효율적인 것으로 결론 지어진다.앞당겨진 7月 셋째 週였다. 8. Culex (Culex) tritaeniorhynchus summoro년의 最大發生 peak는 1981年, 1982年 모두 8月 둘째 週였다. 9. Anopheles (Anopheles) sinensis의 最大發生 peak는 1981年에 7月 다섯째 週, 1982年은 2週 앞당겨진 7月 셋째 週였다. 10. 重要 3種의 最大 peak를 比城하면 Culex (Culex) pipiens pallens와 Anopheles (Anopheles) sinensis는 1981年과 1982年 모두 最大 peak時期가 同一하였으며, Culex (Culex) tritaeniorhynchus summoro년는 2年間 모두 8月둘째 週에 나타났다.osterior to manubrium and anterior to aortic arch) replacing the normal mediastinal fat. (2) In benign thymoma, the marging of the mass was smooth and the normal fat

• Cartoon and Animation Studies
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• s.27
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• pp.177-198
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• 2012

Development of digital media and interest in education bring big progress at digital device of education globally. UK which is advanced country of education is using digital education devices such as digital chalkboards, digital desks etc. and Japan plan digital text book's through the state. At 2011, Korea which is advanced country of internet adopted digital text book 2007 with mathematics, through science and English digital text book through the state. Korea's digital textbook is in a transition period, that needs case-study of advanced country of education for setting design guide and educational effect to Digital text book plan. All researches are based on LG europe design center at London, UK and target countries are UK and Sweden which is advanced country of education and a welfare state. Analysis by using FGI, KJ, survey of questionnaire, heuristic method, concentration observation. Through analytical researches prefer using digital text book with paper text book to using solo that can offer each advantage to user and teacher. Especially Interactive GUI design of digital text book to easy to access for teacher whom not friendly with digital device. When plan Digital text book content and design needs methodical design guide for target who students and teachers an in-depth study of the appraisal and method. The results of the research are introduce the design plan as a basic research and giving useful design plan to make digital text book and digital educational media in industrial aspect.

• Korean Chemical Engineering Research
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• v.62 no.1
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• pp.13-18
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• 2024

To develop flexible electrode materials for wearable devices, we investigated the electrochemical characteristics of carbon fibers tow according to pretreatment. And an electrochemical non-enzymatic sensor was fabricated using glucose as a target. The carbon fibers tow was pretreated through desizing and activation processes, and activation was performed in two ways: chemical oxidation and electrochemical oxidation. Surface morphology of carbon fibers tow samples was observed by SEM and their electrochemical characteristics and sensing performance were investigated by cyclic voltammetry, electrochemical impedance spectroscopy and chronoamperometry. Carbon fibers tow samples showed improved electrochemical properties such as reduced R_et, ΔE_p, and increased I_p through pretreatment. And similar electrochemical properties were obtained with both activation methods. We selected electrochemically activated carbon fibers tow as the final electrode material for application of electrochemical sensor. The non-enzymatic glucose sensor based on this electrode has an enhanced sensitivity of 0.744 A/mM (in a linear range of 0.09899~3.75423 mM) and 0.330 mA/mM (3.75423~50 mM), respectively. Through this study, the possibility of using carbon fibers tow was confirmed as an electrode material. It is expected to be used as basic research for development of high-performance flexible electrode materials.