• Journal of Radiation Protection and Research
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• 제36권2호
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• pp.52-58
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• 2011

이 연구에서는 소골 유적 29호 및 29-1호 주거지 내부에 사용 시기를 달리하여 존재하는 3개의 화덕자리에 대한 광자극발광(OSL) 연대측정을 수행하였다. 연대측정에 앞서 석영 시료의 자연 OSL 신호 관찰 및 절대영년도 평가를 수행한 결과, OSL 신호는 광이온화 단면적이 커 열과 빛에 매우 민감한 fast 성분만으로 이루어졌으며 청동기인들의 일반적인 난방 및 취사 온도인 $300^{\circ}C$ 이하에서도 완벽히 절대영년 됨을 알 수 있었다. 각 시료의 고고선량은 단일시료재현법을 적용한 재현성 평가와 플래토우 평가로부터 산출되었고, 이를 연간선량율로 나누어 OSL 연대를 결정하였다. 이후 산출된 OSL 연대의 정밀도를 높이기 위하여 발굴조사를 통해 파악된 화덕자리의 사용 시기와 각 화덕자리의 OSL 연대를 베이지안 통계에 적용한 결과, 개별 화덕자리의 사용 및 폐기 시점에 대한 높은 정밀도를 갖는 OSL 연대가 최종적으로 확정되었다.

• Journal of Radiation Protection and Research
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• 제37권1호
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• pp.10-15
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• 2012

개인 선량계로 활용될 수 있는 광자극발광(OSL: optically stimulated luminescence) 측정장치의 개발과 이를 위한 이론적 배경 및 개발된 장치의 성능에 대하여 기술하였다. OSL 측정장치는 자극광원과 시료로부터 자극 발광된 광신호 사이의 간섭효과를 최소화하기 위하여 다양한 광학적 필터 조합을 구성해야 하는데, 여기서는 자극광에는 GG420 필터를, 측정부에는 UG11과 BG39 필터로 $Al_2O_3:C$ OSL 물질에 최적화된 광학적 필터를 구성하였다. 자극광원으로 Luxeon V형 고휘도 Blue LED를 선택함으로서 충분한 광량을 확보하였다. 또한 장비 제어 및 측정을 위하여 PC와 OSL 장치 사이에 다양한 제어보드들이 이용되며, 전체 장치의 자동화 및 장치제어는 LabView 프로그램을 이용하여 개발하였다. 개발된 OSL 장치의 신뢰도 및 재현성 평가를 위해 대표적인 OSL 물질인 $Al_2O_3:C$를 이용하여 OSL 특성곡선을 측정하고 이를 기존 상용 OSL 측정장치와 비교하였다.

• 패션비즈니스
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• 제1권2호
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• pp.55-64
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• 1997

This study adapted OSL (Optimum Stimulation Level) to induce the customer's behavior, especially customer's fashion behavior. The purpose of the fashion advertisement was to accelerate the purchasing desire for the clothes by catching the customer's attention. OSL is one of the methods. OSL can satisfy customers' desires using the new stimulation that reveals a customer's individual characters. In general, women are more concern about fashion and sensitive to the clothes of new fashion than men. But nowadays, many of the men are also concern about their appearance and fashion. The differences between men and women in fashion behavior and in each factor, of OSL, especially a relationship between OSL factor and fashion behavior are researched in this study. Such differences analyzed to find the sources that can satisfy their various desires. This study was expected to provide good information to plan advertising strategy in unpredictable market situation. The subjects for this study were 308 male and female university students. Mehrabian and Russell (1974),s ASTS(Arousal Seeking Tendency Scale) was adapted to measure the OSL, and twenty questions regarding fashion leadership and clothing importance released by Kwon, Shin, Lee, are adapted to measure the fashion behavior. An ANOVA was used as statistical analyzing method to find out the difference between men and women in fashion behavior. The relationship between fashion behavior and difference between men and women in OSL factors were measured by MANOVA. Conclusions were as follows; 1. In consciousness degree of fashion leadership and clothing importance in the fashion behavior, women were higher than men. 2. There was a difference between men and women in OSL's each factors in "unusual stimuli" and "sensuality", but there is no significant statistical difference in factors of "change", "risk", "new environment". Therefore women are higher than men in the stimulation level of "unusual stimuli" and" sensuality". 3. Low element of OSL relating to fashion behavior is from "change" and "unusual stimuli". 4. For the relationship between OSL and fashion behavior, fashion leadership and clothing importance were recognized better in the group of higher level of "change" and "unusual stimuli" irrespective of sex. In the case of "change" which is one of OSL factors, High OSL groups were higher than low OSL groups in the consciousness level of the fashion leadership and clothing importance. In men's case, High OSL-Change groups were higher than Low OSL-Change groups in the fashion leadership, but there was no difference between two groups in the consciousness of the clothing importance. In the case of "Unusual Stimuli", High OSL groups were superior to Low OSL groups in the fashion leadership, but there was no significant difference between two groups in the clothing importance. In women's case, High OSL-Change groups were superior to Low OSL-Change groups. In the case of "Unusual Stimuli", High OSL groups were superior to Low OSL groups in the fashion leadership, but there was no difference between two groups in the clothing importance.

• 암석학회지
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• 제23권3호
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• pp.187-195
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• 2014

이 논문에서는 경주시 양남면에 분포하는 해발고도 약 45 m의 수렴단층 노두 해안단구 퇴적층의 형성시기를 추정하기 위하여, 퇴적층을 구성하고 있는 석영에 대한 단일입자 OSL(Single Grain Optically Stimulated Luminescence) 연대측정을 실시하였다. 실험에 사용된 총 1200개의 석영입자 중, 93개의 입자가 연대측정에 적합한 OSL 신호특성을 보였으며, 이들의 등가선량은 50-610 Gy까지 넓은 분포를 보인다. 이 자료를 중심연대모델(Central Age Model)과 최소연대모델(Minimum Age Model)을 이용하여 분석하면, 각각 $83{\pm}4ka$와 $60^{+3}{_{-7}}ka$의 연대가 도출되지만, 이들 연대는 MIS 5a시기로 보고된 기존의 제2해안단구의 OSL 연대와 층서적으로 불일치한다. 단일입자 OSL 분석결과들을 혼합연대모델(Finite Mixture Model)에 적용하면, 분석된 입자들 중 $6{\pm}4%$의 석영입자가 MIS 7의 퇴적시기 $194{\pm}24ka$)를 지시함을 알 수 있다. 결론적으로, 수렴단층 노두 해안단구 퇴적층이 MIS 7 시기에 형성되었을 가능성을 배제할 수 없으며, 이 퇴적층은 일반적으로 적용되는 다입자 OSL(multiple grain OSL) 연대측정법을 적용하기에 적합하지 않은 시료로 판단된다.

• 한국광물학회지
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• 제23권4호
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• pp.357-365
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• 2010

석영의 광여기 루미네선스(OSL)를 이용한 제4기 퇴적물의 연대측정이 최근 널리 적용되고 있다. 그러나 모든 석영시료가 OSL 연대측정에 적합하지는 않다는 사실도 잘 알려져 있다. OSL 연대측정의 신뢰도를 향상시키고 적용범위를 넓히기 위해서는 석영시료별로 다양한 OSL 신호 특성의 원인에 대한 광물학적 규명이 필요하다. 본 연구는 그러한 광물학적 연구의 일환으로 전혀 다른 지질 및 지표 환경에서 채취한 퇴적물 시료로부터 분리한 석영을 대상으로 OSL 신호특성 분석과 레이저삭마 유도결합플라즈마질량분석(LA-ICP-MS)을 이용한 미량원소 조성분석을 실시하였다. OSL 신호분석 결과, 석영시료는 연대 측정에 적합한 신호특성을 갖는 시료와 부적합한 시료로 명확히 분리할 수 있었다. 미량원소조성분석 결과, Al (평균 73~267 ppm)과 Ti (평균 61~248 ppm)의 함량이 가장 높았으며, 그 외 Li, Mg, Cr, Mn, Fe 등이 40 ppm 미만으로 함유되어 있었다. 석영 시료간 OSL 특성의 명확한 차이에도 불구하고, 그에 상응하는 미량원소함량의 뚜렷한 차이는 발견할 수 없었다. 이는 시료별로 다양한 OSL 신호 특성이 미량원소가 아닌 석영의 다른 광물학적 원인에 기인되었을 가능성을 시사하지만, 향후 보다 많은 시료 분석으로 확인되어야 한다.

• Journal of Radiation Protection and Research
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• 제42권1호
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• pp.69-76
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• 2017

Background: Time-resolved optically stimulated luminescence (TR-OSL) is a very useful method for calculating the lifetimes of crystalline quartz and feldspar. Materials and Methods: A compact TR-OSL system was developed, comprising a heater assembly manufactured using Kanthal wire, 2 powerful blue light-emitting diodes (LED, LXHL-PB02) for optical stimulation equipped with VIS liquid light guides, and a photomultiplier tube combined with an optical filter for luminescence detection. A pulse generated from the data acquisition board (NI PCI 6250) was used to initiate on/off signals in LED and TR-OSL measurements. Results and Discussion: The TR-OSL and background signals measured using this TR-OSL system using quartz samples were very similar to those reported in a previous study. Additionally, the lifetimes of the build-up and TR-OSL signals were calculated as $27.4{\pm}2.2{\mu}s$ and $30.3{\pm}0.6{\mu}s$, respectively, in good agreement with the findings of a previous study. Conclusion: It was concluded that the developed TR-OSL system was very reliable for TR-OSL signal measurements and lifetime calculations.

• 분석과학
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• 제29권6호
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• pp.269-276
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• 2016

고산리 유적은 우리나라 최초 토기로 알려진 고산리식 토기가 출토된 초기 신석기시대 유적이다. 이 연구에서는 고산리 유적의 형성 및 점유에 대한 절대연대 편년을 위하여 유적 내 표준 퇴적층에서 채취된 시료를 대상으로 OSL 연대측정을 수행하였다. 각 퇴적층의 고고선량은 $220^{\circ}C$ 열전처리 온도의 단일시료재현법을 적용하여 산출되었으며, 최종적으로 유적의 퇴적환경을 고려하여 maximum age model을 적용하여 결정하였다. 산출된 고고선량을 연간선량율로 나누어 고산리 유적 퇴적층의 OSL 연대를 결정하였다. 각 퇴적층의 OSL 연대와 14C 연대를 종합한 결과, 고산리 유적은 신석기인들에 의해 기원전 9천년 이후에 형성된 이후 고산리식 토기를 포함하는 신석기시대 초기 유적에서부터 다양한 시기의 다양한 유구가 존재해 오다가 기원전 4천년 중반에 폐기되어 현재에 이르렀다고 추론된다.

• Journal of Radiation Protection and Research
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• 제43권4호
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• pp.160-169
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• 2018

Background: This study aims to develop an integrated optical system that can simultaneously or selectively measure the signals obtained from radioluminescence (RL), thermoluminescence (TL), and optically stimulated luminescence (OSL), which are luminescence phenomena of materials stimulated by radioactivity, heat, and light, respectively. The luminescence mechanism of various materials could be investigated using the glow curves of the luminescence materials. Materials and Methods: RL/TL/OSL integrated measuring system was equipped with a X-ray tube (50 kV, $200{\mu}A$) as an ionizing radiation source to irradiate the sample. The sample substrate was used as a heating source and was also designed to optically stimulate the sample material using various light sources, such as high luminous blue light emitting diode (LED) or laser. The system measured the luminescence intensity versus the amount of irradiation/stimulation on the sample for the purpose of measuring RL, TL and OSL sequentially or by selectively combining them. Optical filters were combined to minimize the interference of the stimulation light in the OSL signal. A long-pass filter (420 nm) was used for 470 nm LED, an ultraviolet-pass filter (260-390 nm) was used for detecting the luminescence of the sample by PM tube. Results and Discussion: The reliability of the system was evaluated using the RL/OSL characteristics of $Al_2O_3:C$ and the RL/TL characteristics of LiF:Mg,Cu,Si, which were used as dosimetry materials. The RL/OSL characteristics of $Al_2O_3:C$ showed relatively linear dose-response characteristics. The glow curve of LiF:Mg,Cu,Si also showed typical RL/OSL characteristics. Conclusion: The reliability of the proposed system was verified by sequentially measuring the RL characteristics of radiation as well as the TL and OSL characteristics by concurrent thermal and optical stimulations. In this study, we developed an integrated measurement system that measures the glow curves of RL/TL/OSL using universal USB-DAQs and the control program.

• 한국지형학회지
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• 제28권2호
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• pp.59-70
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• 2021

This study aims to determine the sunlight exposure according to depositional environment to improve the accuracy of optically simulated luminescence (OSL) dating. Sufficient sunlight exposure during transportation of sediment is a basic assumption of the OSL dating, and if the process does not occur enough, the results may be overestimated compared to the actual depositional age. Therefore, the main purpose of this study is to establish a correction method by determining residual or unbleachable dose after sunlight exposure in the actual deposition process, not in the laboratory measurement. Four samples from two sites were collected according to the depositional environment from rivers and coasts, and various OSL signals, including the size of residual dose, degree of dispersion between grains, and OSL signal sensitivity, were measured. As a result, it was confirmed that sediments formed under temporarily high energy environments, such as floods and surges, had relatively high residual dose or large dispersion of residual dose between particles. In further studies, the OSL signal characteristics of river sediments by flow velocity will be identified and the relationship between energy and OSL signal characteristics will be identified in more detail. Moreover, a method of reconstructing the paleo-environment at the time of deposition for existing sediments will be devised. It is expected to provide important information for the frequency of disaster recurrence and prediction of future climate change.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2001년도 가을 학술발표회 논문집
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• pp.253-260
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• 2001

In a structural inverse problem with a limitation to the number of measuring degrees of freedom, the selection of optimal sensor locations (OSL) is critical for a good result. The current research proposes and a new OSL method and compares it with a widely used OSL method. The proposed method utilizes the sensitivity of eigenvectors with respect to the structural parameters. A simulation study for a tower structure is carried out. The structural parameters are estimated by a SI method. The influences of OSL on SI results are investigated.