• Journal of Yeungnam Medical Science
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• v.25 no.2
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• pp.85-91
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• 2008

Intensity-modulated radiation therapy (IMRT) is believed to be one of the best radiation treatment techniques. IMRT is able to deliver fatal doses of radiation to the tumor region with minimal exposure of critical organs. It is essential to have a comprehensive quality assurance program to assure precision and accuracy in treatment, due to the character of IMRT. We applied quality assurance technique to the Eclipse treatment planning system and sought to determine its effectiveness in patient treatment planning. An acrylic phantom, film, and an ionization chamber were used in this study.

• Journal of The Korean Astronomical Society
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• v.38 no.1
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• pp.13-16
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• 2005

We present a period analysis of the well known $\beta$ Lyrae type eclipsing binary GO Cyg $(P= 0^d .7177)$. Several new times of minimum light, recorded photoelectrically, have been gathered. Analysis of all available eclipse timings of GO Cyg has confirmed a significant period increase with rate of $2.52 {\times} 10^{-10}$ day / cycle, also new period has been estimated. New linear and quadratic ephemerides have been calculated for the system.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10b
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• pp.289-293
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• 2006

국내에서도 표준화 작업이 진행 중인 토픽맵은 분산된 정보와 지식의 관리를 지원하기 위한 국제 표준이다. 이 논문에서는 이클립스(Eclipse) 플랫폼의 플러그인 개발환경인 GMF를 이용하여 비교적 작은 도메인에 대한 토픽맵의 구조를 도식화된 방법으로 표현하고, 간편하고 직관적인 편집기능을 사용자에게 제공하며, 이러한 구조의 간단한 프로토타입 정보라 할 수 있는 Linear Topic Map Notation(LTM)을 만들어 내는 플러그 인을 소개할 것이다.

• Journal of Astronomy and Space Sciences
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• v.9 no.2
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• pp.135-142
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• 1992

Surface activity of the late-type supergiant component of $\zeta$ Aurtype eclipsing binary 32 Cyg has been searched in R and I passbands for 53 nights in the 1991 season. Atmospheric extinctions in these wavelength regions are made and a linear relation between the two coefficients has been found. All the data are standardized and determined the magnitudes and colors of 32 Cyg. R, I and color curves of 32 Cyg at the outside eclipse phase are presented.

• Publications of The Korean Astronomical Society
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• v.30 no.2
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• pp.713-714
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• 2015

Indian astronomical texts have records of lunar astronomy since the Puranic age. In the Vednga Jyotia (1350 B CE), the algorithm for computing eclipses is not found. This phenomenon was interpreted in the Siddhntic texts as the occurrence of Vyatipati Yoga. This paper attempts to explain the computing and observational method found in astronomical texts of Siddhntic period.

• Progress in Medical Physics
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• v.25 no.2
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• pp.65-71
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• 2014

A Varian Portal Dosimetry system was compared to an isocentrically mounted MapCHECK 2 diode array for volumetric modulated arc therapy (VMAT) QA. A Varian TrueBeam STx with an aS-1000 digital imaging panel was used to acquire VMAT QA images for 13 plans using four photon energies (6, 8, 10 and 15 MV). The EPID-based QA images were compared to the Portal Dose Image Prediction calculated in the Varian Eclipse treatment planning system (TPS). An isocentrically mounted Sun Nuclear MapCHECK 2 diode array with 5 cm water-equivalent buildup was also used for the VMAT QAs and the measurements were compared to a composite dose plane from the Eclipse TPS. A ${\gamma}$ test was implemented in the Sun Nuclear Patient software with 10% threshold and absolute comparison at 1%/1 mm (dose difference/distance-to-agreement), 2%/2 mm, and 3%/3 mm criteria for both QA methods. The two-tailed paired Student's t-test was employed to analyze the statistical significance at 95% confidence level. The average ${\gamma}$ passing rates were greater than 95% at 3%/3 mm using both methods for all four energies. The differences in the average passing rates between the two methods were within 1.7% and 1.6% of each other when analyzed at 2%/2 mm and 3%/3 mm, respectively. The EPID passing rates were somewhat better than the MapCHECK 2 when analyzed at 1%/1 mm; the difference was lower for 8 MV and 10 MV. However, the differences were not statistically significant for all criteria and energies (p-values >0.05). The EPID-based QA showed large off-axis over-response and dependence of ${\gamma}$ passing rate on energy, while the MapCHECK 2 was susceptible to the MLC tongue-and-groove effect. The two fluence-based QA techniques can be an alternative tool of VMAT QA to each other, if the limitations of each QA method (mechanical sag, detector response, and detector alignment) are carefully considered.

• Journal of Korea Society of Industrial Information Systems
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• v.18 no.5
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• pp.73-80
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• 2013

Recently, Li-ion battery is regarded as a potential energy storage device in the lime light and it can supply power to the satellite very effectively during eclipse. Because it has better features as high voltage range, large capacity and small volume than any other battery. Generally, multi cells are connected in series to use Li-ion batteries in satellite application. Since the internal resistance of cells is different each other, voltage in some cells can be overcharged or undercharged, so capacity of the cell is reduced and the life of whole battery pack is decreased. Therefore, a voltage balancing circuit with Fly-back converter is proposed and the voltage equalization of each cell is verified the prototype in this paper.

• Journal of The Korean Association of Information Education
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• v.16 no.4
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• pp.409-418
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• 2012

In recent years many people are changing their mobile phones from feature phones to smart phones because huge number of useful smart phone applications are released onto the market everyday. Development of smart phone applications could be very helpful educational contents for technologically gifted children who has lots of curiosity and creativity. For this reason this paper deals with development of smart phone application UI(User Interface) layout education programs for the technologically gifted children. These education programs which can operating under Android-based smartphone, have been developed by using JAVA and Eclipse. Survey from the technologically gifted children education experts has been analyzed by Delphi method to figure out effectiveness of the developed education programs.

• Journal of Korea Society of Industrial Information Systems
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• v.12 no.2
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• pp.1-15
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• 2007

The purpose of this study is to design and develop a mobile game using J2ME, which is currently the most popular choice for game development to understand the process of mobile game development and to develop methods that address weaknesses of J2ME. The development was done with the Eclipse IDE(Integrated Development Environment) tool to simplify mobile game development by removing the need for complex commands and installation processes which are intrinsic to the DOS command Batch file arid J2ME Wireless Toolkit when used for the implementation of java mobile games. Literature was also reviewed on mobile game environments, the structures of J2ME Platform, and past research on mobile games, to investigate which parts of J2ME are important to the characteristics of mobile game development and how to implement these important parts when developing.

• Journal of Information Management
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• v.42 no.2
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• pp.103-120
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• 2011

The astronomical data obtained by observations of celestial objects movements are useful in our daily life. These data - such as 1) sunrise and sunset data, 2) data transformation between lunar calendar and solar calendar, 3) solar eclipse and lunar eclipse data, and 4) sun's altitude and azimuth data - were used to important things in the agricultural society and ancient kingdom. In the modern society, these data have been used continuously for the legal disputes, construction of buildings and the other areas. This is a good example of pure science data using directly in our life. However there are difficulties to public service because all the data were printed as an Almanac. Using MySQL, we constructed web-based service system which makes to use them easily. This database system was made for the quick search using the calculated orbital data of celestial bodies.