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安東潮에 依한 慶北北部 地域의 氣象調査(Ⅰ) : 安東地域의 안개 現象을 中心으로
孫鍊圭,金碩煥,權聖德,盧景錫 安東大學附設 安東文化硏究所 1987 安東文化 Vol.8 No.-
안개는 大氣中의 水分含量에 依한 形態로 나타나는 氣象現象으로 內陸地方은 夜間에는 福射冷却現象으로 發生한다. 安東地域은 Dam建設後 日出 前後 2時間 生成되었다가 消滅되어 持續時間이 3 ~ 4暗間 程度이며, 안개發生日數도 10餘日 增加하였으며, 500 ~ 1000m程度의 視程 現象도 자주 나타나며 8月頃에는 湖上의 안개發生 頻度가 隣近地域보다 增加하였다. A fog is a cloud, the meteological phenomena formed by the amount of water vapor that the air holds. Fog is formed in cabs that the radiation heat originated from the ground cools the upper air near the ground on a clear night. In An-Dong region, the fog phenomena continued for 2 hours before and after sunrise and it's duration time was 3∼4 hours. The formation of fog occurred more frequently about 10 days per year than bet ore Dam- construction. The range that it can be easily seen through is about 500∼1000m. The frequency of fog- formation on the Dam region is greater than that in the neighboring region at the early days of August.
MgB₄O7 熱螢光體의 특성과 低에너지 X線의 線量測定
김영국,손인호,설정식,채건식,노경석 慶南大學校 附設 基礎科學硏究所 1997 硏究論文集 Vol.11 No.-
To develope the thermoluminescent radiation sensors and low energy X-ray of dosimetry. The TL phosphors of MgB₄O7 are prepared and their physical characteristics are investigated. MgB₄O7 : Tb. Tm. Dy. La. Ho. and Nd phosphors have been prepared by sintering around 580℃ for 2 hours followed by flowing Ar gas. Ar gas. Activation energy and kinetic order of main peak of glow curve were studied by two methods peak shape method and initial rise method. By these methods, the estimated activation energies were 0.76±0.02eV(Tb doped). 0.94±0.03(Tm doped). 0.72±0.02 (Dy doped). respectively. The activation energy frequency factor and kinetic order of thermoluminescent process for each TL phosphors are measured by analyzing the glow curve by initial rise. peak shape. different heating rate. isothermal decay method. And The emission spectra of TL phosphors are also measured. The TL phosphors prepared in this work may be utilized to radiation sensor elements becaue of their high sensitivity to low energy X-ray.
Mixing chamber를 사용하여 그라데이션 색상을 구현하기 위한 G-code 생성기 개발
노경석(Kyoung-Seok Noh),서해원(Hae-Won Seo),김태영(Tae-Young Kim),이용구(Yong-Gu Lee) (사)한국CDE학회 2017 한국CDE학회 논문집 Vol.22 No.1
The recent 3D printing industry has been focusing on developing 3D printers to fulfill the user’s need to bring more colorful and realistic outcomes. Several 3D printers have deployed multiple extruders to print different colors. However, this method has a limit on its availability of colors. To solve this, recent research is focused on using mixing chambers to mix the possible colors to provide more color availability. In this paper, we discuss the environment and algorithm behind the development of G-code which allows a gradation effect of the mix of two filaments. The generation algorithm to make gradient G-code has been implemented in Cura using C ++ and Python.
Mg₂SiO₄: Tb, Nd, Dy 열형광선량계에서 활성제 농도가 Glow Curve에 미치는 영향
노경석,채근식,오재근,김영국,이은숙,설정식,손인호 慶南大學校 附設 基礎科學硏究所 1996 硏究論文集 Vol.8 No.-
The Mg₂SiO₄: Tb, Nd, Dy thermoluminescent phospher has been prepared by sintering Mg₂SiO₄after doping the transition elements Tb, Nd and Dy. The heating rate is 10℃/sec at this thermoluminescent phospher are heated. From the results of this study, the following conclusions were obtained. The maximum peaks are found in the measured Mg₂SiO₄: Tb, Nd, Dy, and TL glow curve at 289℃, 252℃ and 220℃ when the 1wt.% ∼ 5wt.%. Glow curve of TLD increased TL intensity and temperature of peak appears to the high temperature when the heating rate is 10℃/sec∼25℃/sec. The activation energy of the main peak has been estimated by the peak shape method. The estimated activation energies are 1.26 eV, 0.53 eV and 0.80 eV respectively. The thermoluminiscence process in Mg₂SiO₄: Tb, Nd, Dy are found to the 2nd order when the main peak of the glow curve is analyzed by peak shape method. The Mg₂SiO₄: Tb thermoluminescent phosphor is the most sensitive to X-rays among the other materials. The dose responses of Mg₂SiO₄: Tb, Dy TLD are linear up to intensity of X-ray.
제재용(Jae-Yong Je) · 박철우(Chul-Woo Park) · 노경석(Kyung-Suk Noh) 대한방사선과학회(구 대한방사선기술학회) 2009 방사선기술과학 Vol.32 No.1
본 연구는 인체 팬텀(alderson rando phantom)의 등쪽에 원통형 전리함을 부착하여 방사선 치료 조사야 내 환자와의 접촉 물질과 조사 야의 크기, 방사선 입사각도에 따른 피부 후 방향 선량 변화를 조사하였다. 연구 결과 테니스 라켓 줄(tennis racket)의 마일러(mylar)를 기준으로 첫째 : 조사야 10×10 cm2 기준으로면(cotton)은 약 2%, breast board는 약 8%, 15×15 cm2에서는 약 6%, 20×20 cm2는 약 10% 증가하였으며,5×5 cm2에서는 약 13% 정도 감소하였다. 둘째 : 방사선 입사각도가 0°로 기준으로 하여 5°에서는 breast board 0.4%, tennis racket 0.5%, cotton 1.1%, 10°에서는 breast board 1.5%, tennis racket 1.9%, cotton 2.6%, 15°에서는 breast board 3.9%, tennis racket 2.6%, cotton 3.86% 감소하였다. 결과적으로 carbon 재질의 치료보조기구는 피부표면선량의 크게 증가하므로 치료조사야 내에서는 피부와의 접촉을 피해야 한다. The research was about the relation between the dorsal side dose measured by using the phantom body (Alderson Rando Phantom) and factors like contacted material of the patients, the size of the field, angle of incidence. Compared with mylar (tennis racket), the dose on 10×10 cm2 field size of cotton was increased by 2% and by 8% in the case of breast board. In the case of 15×15 cm2 field size, the dose was increased by 6% compared with 10×10 cm2 size. The field size of 20×20 cm2 resulted in 10% increase of dose, while 5×5 cm2 produced 13% decrease. Compared with incident angle 0°, the cases for the incident angle 5° had 0.4% less dose for breast board, 0.5% for tennis racket, 1.1% for cotton. The cases for the incident angle 10° had 1.5% less dose for breast board, 1.9% for tennis racket, 2.6% for cotton. For the incident angle 15°, breast board, tennis racket, cotton caused decrease of dose by 3.9%, 2.6%, 3.86% respectively. Resultantly carbon material can cause more skin dose in treatment field. By the results of this study, we recommend that one should avoid the contact between the carbon material and skin.
손인호,노경석,채건식,김영국 慶南大學校 附設 基礎科學硏究所 1994 硏究論文集 Vol.6 No.-
CaSO₄thermoluminescent phosphor has been prepared by sintering the CaSO₄after doping the transition elements Dy, Tm. The maxium peaks are found in the measured CaSO₄TL glow curve at 280°C, 230°C when the heating rate is 5°C/sec. The activation energy of the main peak has been estimated by the peak shape method. The estimated activation energies are 1.26 eV, 1.23 eV respectively. The dose responses of CaSO₄TLD are linear up to 1-800 red of X-rays.