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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.
휴대 장치를 위한 Layered Transmission에 관한 연구
박노경,서상진,진현준 湖西大學校 工業技術硏究所 2005 工業技術硏究所論文集 Vol.24 No.-
Mobile multimedia services have rapidly evolved in the areas mainly including cell phones. Due to the increment of data traffic, processing load of server systems, network congestion and response time of clients also increase constantly. In this paper, a layered transmission technology is proposed of which the size of requested stream from clients has reduced and its performance is evaluated through the simulation. The layered transmission decreases data traffic to 78.5% averagely by converting format of data source in accordance with the playback performance of mobile devices. It is analyzed that decrement of streaming data size depends on EFS, resolution of LCD screen, and bytes per pixel. For real applications, layered transmission consists of modules based on filters using the Directshow considering portability, scalability, and reusability.
CaSO₄: Dy 열형광선량계에서 활성제 Dy가 Glow 피크에 미치는 영향
손인호,김영국,노경석,채건식,이은숙 慶南大學校 附設 基礎科學硏究所 1995 硏究論文集 Vol.7 No.-
CaSO ₄ thermoluminescent phosphor has been prepared by sintering the CaSO ₄ after doping the transition element Dy. The maximum peaks are found in the measured CaSO ₄ TL glow curve at 210℃, 240℃ when the 0.01-0.1 mol % and 0.2-0.5 mol %. The activation energy of the main peak has been estimated by the peak shape method. The estimated activation energies are 1.26 eV respectively. The dose responses of CaSO₄TLD are linear up to 1-800 rad of X-rays.
김영국,손인호,채건식,노경석 경남대학교 환경문제연구소 1993 환경연구 Vol.15 No.-
CaSO₄ thermoluminescent phosphor has been prepared by sintering the CaSO₄ after doping the transition elements. The maximum peaks are found in the measured CaSO₄, TL glow curve at 130℃, 110℃ when the heating rate is 5℃. The activation energy of the main peak has been estimated by the peak shape method. The estimated activation energies are 1.02 eV, 1.32 eV respectively. The thermoluminescence process in CaSO₄, are found to the 2nd order when the main peak of the glow curve is analyzed by peak shape method.
채건식,김영국,손인호,노경석 경남대학교 신소재연구소 1995 論文集 Vol.5 No.-
본 연구에서는 CaSO₄에 활성체로 전이원소인 Tm, Dy, V, Mo을 첨가하여 CaSO₄ : Tm, Dy, V, Mo 열형광에를 제작하였다. 주 peak는 불순물의 농도와 온도에 따라 CaSO₄ : Tm, Dy, V, Mo의 열형광 glow curve에서 구하였다. 활성화에너지는 peak shape 법으로 구하였는데 각각의 불순물에서 1.5eV, 1.25eV, 0.8eV, 1.17eV를 얻었다. 그리고 CaSO₄: Tm, Dy, V, Mo 열형광체는 peak shape 법으로 분석해 본 결과가 모두 2차 발광이었다. CaSO₄: V, Mo 열형광체가 X-선에 가장 감도가 좋았으며, 1-100 Rad의 X-선을 조사하였을 때 열형광감도는 선량의존성을 보였다. The principle of dose measurement by thermoluminescent dosimeter(TLD) was investigated. CaSO₄:Tm. Dy. V. Mo thermoluminescent phosphor has been prepared by sintering the CaSO₄after doping the transition elements Tm, Dy. V. Mo. The maximum peaks are found in the measured CaSO4 Tm. Dy. V. Mo TL glow curve at impurity mol% and annealing temperature. The activation energy of main peak has been estimated by the peak shape method. The estimated activation energies are 1.5 eV. 1.25 eV. 0.8 eV. and 1.17 eV. respectively. The thermoluminescence process in CaSO₄: Tm. Dy. V. Mo are found t o the 2nd order when the main peak of the glow curve is analyzed by the peak shape method. CaSO₄: V. Mo thermolunescent phosphor is the most sensitive to X-rays among the other materials. The dose responses of CaSO₄: Tm. Dy. V. Mo TLD are linear up to 1 - 1000 Rad of X-rays.
Mg₂SiO₄ : La, Ho 열형광선량계에서 활성제 농도가 글로우 커브에 미치는 영향 La, Ho TLD on Activation Concentration
김영국,손인호,채건식,노경석,오재근,이은숙 경남대학교 신소재연구소 1996 論文集 Vol.6 No.-
본 연구에서는 Mg₂SiO₄에 활성화 물질로 La, Ho를 첨가하여 열형광체를 제작하였고 불순물의 농도를 1wt.% ∼5 wt.%까지 변화시키면서 열평광강도의 glow curve를 측정하였다. 도한 열형광체의 glow curve를 peak shape법으로 분석해서 TL특성에 대한 포획 매개변수와 활성화 에너지, 발광차수, 선량의존성등을 조사하였으며, 그 물리적 특성을 조사하고 선량계로서 타당성과 실용성을 확인하였다. The Mg₂SiO₄: La, Ho thermoluminescent phospher has been prepared by sintring Mg₂SiO₄after doping the transition elements La and Ho. The heating rate is 10℃/sec at this thermoluminescent phospher are heated. The maximum peaks are found in the measured Mg₂SiO₄: La and Ho. TL glow curve at 229℃ and 345 C when the 1 wt.%-5 wt.%. The glow curve of TLD increased TL intensity and temperature of peak appears to the high temperature when the heating rate is l0℃/sec-25℃/sec. The activation energy of the main peak has been estimated by the peak shape method. The estimated activation energies are 1.77 eV. 1.52 eV respectively. The thermoluminescence process in Mg₂SiO₄: La and Ho are found to the 2nd order when the main peak of the glow curve is analyzed by peak shape method. The dose responses of Mg₂SiO₄: La and Ho TLD are linear up to intensity of X-ray.
Acute Energy Expenditure to Concurrent Aerobic and Hydraulic Resistance Exercise in Obese Women
( Kyung Hee Kim ),( Hyun Min Choi ),( Ho Sung Nho ),( Won Il Park ),( Jong Mok Chun ),( Chan Ho Kim ),( Chan Ho Park ),( Jong Kyung Kim ) 한국운동영양학회 2010 Physical Activity and Nutrition (Phys Act Nutr) Vol.14 No.4
It has been reported that combining both hydraulic resistance exercise and aerobic exercise (PACE) improves cardiorespiratory fitness and muscular strength in non-obese individuals. This study examined the effect of PACE training in obese women on energy expenditure during moderate self-selected intensity exercise. We tested the hypothesis that PACE training would elicit greater energy expenditure than stationary cycle exercise. Ten obese women completed a maximal exercise test. On separate days, all participants performed a submaximal PACE and a stationary cycle exercise trial. Submaximal energy expenditure (6.2±0.4 vs. 5.5±0.4 kcal/min), oxygen uptake (20.3±0.75 vs. 18.1+0.57 ml/kg/min), heart rate (142±5 vs. 136±6 bpm), percentage of oxygen uptake reserve (64.5+5 vs. 55.4±3%), and percentage of maximal heart rate 79±4 vs. 76±4%) were significantly higher during PACE compared to cycling exercise. Results suggest that self-selected PACE training optimizes energy expenditure during submaximal intensity exercise in obese individuals.