• Journal of Digital Convergence
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• v.15 no.7
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• pp.343-350
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• 2017

Music Braille is essential and academic materials for the blind to learn and enjoy music. In Korea, National Library for the Disabled is the public institution for the manufacture digital music braille by the request and the center of music rehabilitation the disabled also make the digital music braille on a welfare level. However, most of braille libraries in Korea do have little music braille compared to other braille books. This paper reports the current situations how braille libraries including National library for the Disabled contain braille books, music brailles and digital music brailles to find out that the blinds can be provided exact informations about music brailles and digital music brailles so they can learn music with the right materials such as music brailles. In conclusion, the construction of Database for the digital music brailles is required and necessary for the blind to have better activities of music from the welfare and artistic point of view.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2002.06a
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• pp.433-445
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• 2002

This study is to consider the current status of e-payment of local tax, one of the e-business models between Government and Customers(G2C) which is designed for the implementation of e-Government, and to present the activated policy for e-payment of local tax. For the survey, the complete enumeration is conducted through the questionnaire survey with those people who have used the e-payment tax system in C county and interview with those officials who are in charge of tax affairs in 232 local autonomies in Korea. As the system introduction status is viewed, the e-payment of local tax system is operated in 196 cities and counties in nation-wide but it has shown big differency in the extent of utilization according to regions. And the way of system operation is varied and the age bracket of those users is mainly comprised of 30's. In sum, a severe gap among taxpayer's age group, regional difference, and the lag of information in the system infra is appeared. But users consider this system to be settled as a new tax-payment system, and the good prospect is anticipated. As an activating policy for the e-payment of local-tax, some measures-providing incentives to those users of e-payment of tax system, improving the operating system, and enhancing the information education for taxpayer's-are needed to be taken. Hereafter, in-depth study on the e-payment tax system which is planned for the realization of e-Government is expected through a more systematic and scientific approach to this field.

• Journal of Korea Port Economic Association
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• v.34 no.3
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• pp.93-112
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• 2018

The purpose of this study is to analyze the flow of e-commerce freight transported by maritime transportation for China and to identify the characteristics of cargo by region/item for finding the ways to promote e-commerce export to China. Thus, this study analyzed the e-commerce export and import data on cargo moved via maritime transportation between Korea and China from 2015 to 1Q18, using Origin-Destination(OD) analysis and visualization techniques. The results indicated that the largest number of Chinese e-commerce cargoes were imported at Incheon Port, which has a clearance facility for e-commerce cargo. In the case of Pyeongtaek Port, e-commerce cargo imported from China has transported to Incheon Customs again, causing the inefficiency through the customs clearance process. Unlike the case of e-commerce imports where the final destination is distributed nationwide, e-commerce products exported to China through maritime transportation were found to be mainly confined to Seoul and Gyeonggi provinces, where freight forwarding companies and forwarders are concentrated. In addition, unlike e-commerce import cargoes, e-commerce items exported through maritime transportation were mainly confined to clothing and cosmetics, and export volume was also less than imports. This study provides some possible strategies to increase the volume of freight and to attract export products as follows: i) to diversify products exported to China through e-commerce transshipment, ii) to diversify export items by building the cold chain in e-commerce transport with China.

• Proceedings of the IEEK Conference
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• 2005.11a
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• pp.833-836
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• 2005

Nano-gap trench is fabricated by the novel electrochemical etching technique using forward biased PN junction formed at the backside of the wafer. PN junction is formed using boron nitride wafer and the concentration of the boron doping is the high value of $1{\times}10^{19}$ $cm^{-3}$. The electro-chemical etching is performed in the 5% HF solution under the forward bias voltage of $1{\sim}2V$. The relationship between the etch rate of the trench and the voltage of the forward bias is investigated and the dependence of the gap for the voltage also examined. The etch rate increase from 0.027 ${\mu}m/min$ to 0.031 ${\mu}m/min$ as the value of the applied voltage increase from 1V to 2V, but the the gap is kept constant value of 40 nm.

• Journal of IKEEE
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• v.15 no.1
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• pp.86-95
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• 2011

In this paper, we propose a testbed system for the crisis management system of the power grid(CMS-PG) using satellite communication network. For the verification of CMS-PG, the proposed system composed of the simulator of satellite communication network and the simulator of phase measurement unit. Proposed satellite communication simulator can evaluate the delay and the robustness of the communication according to the rainfall and the humidity of local site. And the proposed simulator can calculates the voltage stability by hardware implementation using FPGA. Using the proposed testbed system, we adapted its function of crisis management system for the conventional power grid.

• The Journal of the Korea institute of electronic communication sciences
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• v.7 no.5
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• pp.1245-1251
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• 2012

Recently, needs of recreational marine industry are consistently increasing due to increasing of income and pursuit on well-being. For these needs, central government and local governments have tried to build tens of marinas to meet demands and promote related industries. Therefore, need of smart pedestal system has also increased. However, domestic companies have not manufactured smart pedestal systems, so many pedestal systems have been imported from advanced countries such as England, Denmark, and Italy. This research has developed a smart pedestal system using IT convergence technology. This system is assembled by each several module which has its own function and board. Each module is not developed on an embedded OS. Instead, it has its customized operational software based on its kernel. Thus, this system brings about cost reduction of productions and maintenance.

• Proceedings of the KIPE Conference
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• 2009.11a
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• pp.191-193
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• 2009

최근 국내 신재생에너지설비의 설치가 급증하고 있다. 전국적으로 신재생에너지원의 설비가 산재되어 있음에도 불구하고 관리 및 운영 시스템은 미비한 수준이다. 따라서 사후관리 체계 구축과 설비 이용률 향상을 목적으로 가동현황을 파악하여, 신재생에너지원의 효율적인 관리와 통합 운영을 위한 시스템이 필요하다. 이를 위해 본 논문에서는 통신 및 모니터링 기술기준에 제정된 공용규격에 따라 다수의 계측기와 데이터를 수집, 변환, 저장하고, 중앙서버로 데이터를 전송할 수 있는 시스템을 구현하여 더욱 효율적인 신재생에너지원의 운영을 돕는다. 본 시스템은 신재생에너지원의 계측기와 RS-232 혹은 RS-485를 이용한 하위통신을 하여 관리에 사용될 여러 정보를 수집하여 저장한다. 상위통신으로 PIRP(Platform Independent Reporting Protocol)에 맞는 데이터로 변환하여 중앙서버에 데이터를 보내게 된다. 또 한, 유저가 원한다면 중앙서버에서 과거의 데이터를 획득할 수 있도록 시스템을 구현하였다.

• Proceedings of the Korea Association of Information Systems Conference
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• 2001.12a
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• pp.181-193
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• 2001

최근 대학도서관들은 정보화 환경에 대한 능동적 대처를 위하여 많은 노력을 기울이고 있다. 교수나 학생의 연구, 교육, 학습에 필요한 각종 전자 정보원을 한 장소에서 검색, 열람이 가능하고 대학의 구성원들에게 새로운 정보기술과 정보의 활용 능력을 교육시키기 위한 다양한 기능을 가진 하나의 복합 공간으로서 전자 정보실 또는 멀티미디어실(이하 멀 티미디어실) 등을 설치, 운영하고 있다 그러나 아직도 대학도서관 내의 멀티미디어실의 역할과 개념이 모호하다는 지적이 나오고 있다. 이러한 가운데 운영면에서도 표준 솔루션의 부재로 관리 전산화가 이루어져 있는 곳이 부족하여 인력 및 시간의 낭비가 초래되고 이용자 관리에 있어서 어려움을 겪고 있는 실정이다. 체계적인 운영이 이루어지지 않고서는 양질의 서비스 제공은 기대하기 어려울 것이다. 따라서 전국 대학 도서관에 적용할 수 있는 표준적인 멀티미디어실 관리 시스템의 개발이 필요하다. 본 연구에서는 UML(Unified Modeling Language) 기반의 정보시스템 구축 방법론을 제시하고, 제시된 방법론의 유효성(effectiveness)을 검증하기 위하여, 본 방법론에 입각하여 동국대학교 경주캠퍼스의 멀티미디어실 업무 프로세스를 분석 설계하였다. 시스템 구현을 위해서, 데이터 베이스로는 Oracle RDBMS를, 개발도구로는 Visual Basic 6.0을 사용하였다 본 논문에서 구현된 시스템을 통하여 멀티미디어실의 효과적인 운영관리에 대한 기반정립에 기여하고, 향후 장기적인 발전계획 수립에 하나의 도구로서 사용될 수 있다고 판단된다.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.31A no.5
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• pp.113-120
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• 1994

Silicon flow sensor that can detect the velocity and direction of air flow was designed and fabricated by integrated circuit process and bulk micromachining technique. The flow sensor consists of three-layered dielectric diaphragm, a heater at the center of the diaphragm, and four thermopiles surrounding the heater at each side of diaphragm as sensing elements. This diaphragm structure contributes to improve the sensitivity of the sensor due to excellent thermal isolation property of dielectric materials and their tiny thickness. The flow sensor has good axial symmetry to sense 2-D air flow with the optimized sensing position in the proposed structure. The sensor is fabricated using CMOS compatible process followed by the anisotropic etching of silicon in KOH and EDP solutions to form I$\mu$ m thick dielectric diaphragm as the last step. TCR(Temperature Coefficient of Resistance) of the heater of the fabricated sensors was measured to calculate the operating temperature of the heater and the output voltage of the sensor with respect to flow velocity was also measured. The TCR of the polysilicon heater resistor is 697ppm/K, and the operating temperature of the heater is 331$^{\circ}C$ when the applied voltage is 5V. Measured sensitivity of the sensor is 18.7mV/(m/s)$^{1/2}$ for the flow velocity of smaller than 10m/s.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.38 no.9
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• pp.605-610
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• 2001

Electrostatic comb-drive microactuators with sub-micron gap were fabricated and tested. We designed and fabricated two type of electrodes which are rectangular and triangular tip. The fabricated microactuators with triangular tip resulted in the electrode gaps in the range of 0.55 ${\mu}{\textrm}{m}$~1.35 ${\mu}{\textrm}{m}$ Displacement of 1 ${\mu}{\textrm}{m}$ and electrostatic force of 2.3 $\mu$N were observed in a triangular-tip microactuator with 0.55 ${\mu}{\textrm}{m}$ gap when a DC drive voltage of 13 volts was applied. Measured 1st resonance frequency of microactuators was about 23 kHz.