• Journal of Service Research and Studies
• /
• v.3 no.2
• /
• pp.45-52
• /
• 2013

With the development of information and communication technology, the Internet is more important in the social and economic influence rapidly, and it is no different in the field of health care. As health information on the Internet increasing, the availabilities of health information from the Internet becomes more important with health care professionals and information specialists. the quality of health information on the Internet are continually being presented without any guarantee or judge on the quality. It is needed to provide the right to use of qualified health information through Internet. HONCODE has been established and managed by HON (Health On the Net) Foundation. In this paper, Web sites of thyroid cancer Information are evaluated using HONCODE. They provide domestic medical information on the Internet. Through this, more accuracy and evaluated information could be provided on the Internet about the thyroid cancer.

• Journal of Mechanical Science and Technology
• /
• v.17 no.3
• /
• pp.336-342
• /
• 2003

Increasing demand on precision machining using computerized numerical control (CNC) machines have necessitated that the tool move not only with the smallest possible position error but also with smoothly varying feedrates in 3-dimensional (3D) space. This paper presents the simultaneous 3D machining process investigated using a retrofitted PC-NC milling machine. To achieve the simultaneous 3-axis motions, a new precision interpolation algorithm for 3D Non Uniform Rational B-Spline (NURBS) curve is proposed. With this accurate and efficient algorithm for the generation of complex 3D shapes, a real-time NURBS interpolator was developed using a PC and the simultaneous 3D machining was accomplished satisfactorily.

• Journal of the Optical Society of Korea
• /
• v.2 no.2
• /
• pp.64-73
• /
• 1998

We have theoretically analyzed and experimentally observed the effects of wavelength dependent birefringence inside a laser cavity on the output characteristics of fiber lasers with a figure eight geometry. The spectral and polarization characteristics of fiber lasers are found to be very susceptible to the resultant birefringence composed of the intrinsically existing wavelength dependent birefringence and the externally induced birefringences inside the fiber. For the variation of twist-induced birefringence inside the nonlinear amplifying loop mirror, the laser output power and center wave-length of continuous wave lasers change periodically, but the polarization characteristics remains nearly unchanged. The changes of the birefringence inside the linear loop has little effect on the spectral characteristics but changes the polarization properties such as the polarization direction.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
• /
• 2007.04a
• /
• pp.99-102
• /
• 2007

우리나라의 교통사고발생은 OECD국가 중 인구 10만명당 사망자 14.9명으로 29개국 중 25위로 최하위권에 머물러있는 실정이다. 본 연구는 현재 적용하고 있는 우리나라 도로구조시설기준에서 정지시거에 대한 기준이 현실적이지 못하다고 분석되었기 때문에 근거리사진측량을 이용하여 3차원 모델링하고 정지시거를 명확한 근거에 기준하여 이를 규명하고자 수행하였다. 따라서 본 연구는 도로 정지시거의 기준을 재정립하여 안전하고 쾌적한 도로설계 기준을 제시하는데 그 목적이 있다.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.18 no.4
• /
• pp.342-348
• /
• 2013

In this paper, an improved non-isolated 3-level high step-up boost converter is proposed. By using the well known duality principle, the proposed converter is derived from two-phase buck converter. Compared with the traditional boost converter and 3-level boost converter, the proposed converter can obtain very high voltage conversion ratio and the voltage stress of switching devices and diodes is only 1/4 of the output voltage. A 1 kW prototype converter is built and tested to verify performances of the proposed converter.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.18 no.4
• /
• pp.305-311
• /
• 2013

This paper proposes a performance improvement of existing single-phase current-fed qZ-Source inverter. Voltage gain of the traditional voltage-fed full-bridge inverter and single-phase current-fed qZ-source inverter is only equal to or smaller than input voltage. The proposed inverter can obtain twice higher voltage gain than the single-phase current-fed qZ-Source inverter by adding an extra switch and a capacitor in the circuit. In addition, the proposed inverter shares the common ground between dc input and ac output voltage. Therefore, the proposed inverter can eliminate the possible ground leakage current problem when it is used for grid-tied photovoltaic inverter system. A 120 W prototype inverter is built and tested to verify performances of the proposed inverter.

• Transactions of the Society of Information Storage Systems
• /
• v.11 no.1
• /
• pp.6-10
• /
• 2015

Optical library system consists of disc magazines, cabinets, transfer robot and drive. Transfer robot delivers desired disc or magazine in cabinet to drive which reads data of disc. Conventional archive system stores discs in a line and transfer robot moves in one dimension. However, to store more discs, new optical archive system, optical library system, is developed which stores discs in two dimension like bookcase. Transfer robot should know the position and stored data of desired magazine to get correct data. In this paper, addressing algorithm using optical character recognition is proposed. Proposed algorithm is evaluated by experiments with implemented system.

• ETRI Journal
• /
• v.25 no.2
• /
• pp.81-88
• /
• 2003

We designed a multimode interference (MMI) coupler to use in vertical coupling of double layered polymeric waveguides and analyzed the coupling characteristics by comparing our experimental and simulation results. We found that our proposed new structure, a stepped MMI coupler, is effective in vertical coupling between waveguide layers with a short length of MMI and has a high tolerance for the variation in the structure of an MMI coupler that can be induced as errors in the fabrication process.

• ETRI Journal
• /
• v.18 no.1
• /
• pp.1-14
• /
• 1996

We have experimentally observed and theoretically analyzed the gain dependent optimum repetition rates of a hybrid-type active and passive mode locked laser pulses in an erbium-doped fiber laser of the figure-of-eight geometry by utilizing a nonlinear amplifier loop mirror (NALM) as a saturable absorber and a directional-coupler type electro-optic modulator as an active mode locker. Transform-limited mode-locked pulses of about 10 ps width were obtained at repetition rates which correspond to harmonics of the cavity fundamental frequency and depend on the optical amplifier gain in the NALM.

• International Commerce and Information Review
• /
• v.11 no.4
• /
• pp.313-344
• /
• 2009

Corporate Social Responsibility(CSR) is considered recently a key factor for the firm's success and sustainable growth in today's changing business environments. Discussions on CSR are extensively unfolding in various sectors, public, civil society and business organizations, across the world. Consumer in foreign markets have been insisted that multinational corporations and foreign supplier need to adapt their business activities to not only the economic, but also social needs of the consumer. Therefore Korean companies operating in global markets need their global CSR strategy, which will contribute to the improvement of their international competitiveness and long term growth. Thus, the purpose of this study is to report on the strategy of corporate social responsibility through the literature review and illustration of CSR activities of the leading companies in global market. In addition, this paper is aimed to provide Korean firms the insight in reinforcement of global competitiveness in relation of strategic CSR.