• East Asian mathematical journal
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• 제22권2호
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• pp.195-205
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• 2006

Using the notion of anti fuzzy points and its besideness to and non-quasi-coincidence with a fuzzy set, new concepts of an anti fuzzy subgroup are introduced and their inter-relations are investigated.

• Journal of Radiation Protection and Research
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• 제41권4호
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• pp.328-332
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• 2016

Background: Boron Neutron Capture Therapy (BNCT) is a new radiation therapy. In BNCT, there exists some very critical problems that should be solved. One of the severest problems is that the treatment effect cannot be known during BNCT in real time. We are now developing a SPECT (single photon emission computed tomography) system (BNCT-SPECT), with a cadmium telluride (CdTe) semiconductor detector. BNCT-SPECT can obtain the BNCT treatment effect by measuring 478 keV gamma-rays emitted from the excited state of $^7Li$ nucleus created by $^{10}B(n,{\alpha})$ $^7Li$ reaction. In the previous studies, we investigated the feasibility of the BNCT-SPECT system. As a result, the S/N ratio did not meet the criterion of S/N > 1 because deterioration of the S/N ratio occurred caused by the influence of Compton scattering especially due to capture gamma-rays of hydrogen. Materials and Methods: We thus produced an arrayed detector with two CdTe crystals to test cross talk phenomenon and to examine an anti-coincidence detection possibility. For more precise analysis for the anti-coincidence detection, we designed and made a collimator having a similar performance to the real BNCT-SPECT. Results and Discussion: We carried out experiments with the collimator to examine the effect of cross talk of scattering gamma-rays between CdTe elements more practically. As a result of measurement the coincidence events were successfully extracted. Conclusion: We are now planning to carry out evaluation of coincidence rate from the measurement and comparison of it with the numerical calculations.

• 대한전자공학회논문지
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• 제4권2호
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• pp.3-15
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• 1967

감마선 후방산란을 이용한 철관 두께 측정용 측후계의 설계의 있어서 1/2인치 이하의 얇은 NaI 크리스털을 사용함으로써 계측부에 있어서 1개의 파고선별회로와 Anti-coincidence Circuit를 제거할 수 있다. 이 방식은 종래의 방식에 비하여 훨씬 회로가 경제적이면서도 거의 비슷한 정밀도와 안정도를 유지할 수 있다. 본논문에서는 위와 같은 새로운 방식에 의하여 설계, 시작된 측정기로서 지금까지 타연구자에 의하여 시도되지 않았던 200℃의 고온파이프의 관순측정실험을 행하였던바 상온에서의 측정치보다 불과 5%이내의 변화밖에 가져오지 않음을 실험적으로 확인하였다.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2004년도 학술논문집
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• pp.433-433
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• 2004

Neutron induced prompt gamma-ray spectroscopy (NIPS) system measures the prompt gamma-ray, emitting by the interaction of a neutron with various materials. This system will be of great benefit to scientists worldwide, since it provides the non-destructive measurement of many elements in either solid or liquid wastes. A NIPS facility has been developed in Nuclear Chemistry Research Division, at Korea Atomic Energy Research Institute (KAERI) with the aim of analyzing the major component elements in both aqueous and solid samples.(omitted)

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 1993년도 한국우주과학회보 제2권2호
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• pp.23-23
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• 1993

과학로케트에 탑재되는 x-선 검출기에서 검출되는 2 kev 에서 10 kev 사이의 x-선 신호를 분석하여 데이터를 얻고, 전송하기 위한 피로를 설계하고 제작하였다. 신호처리회로의 전체적인 구성은 2 - 10 key의 x-선 에너지 및 event time을 측정하는 회로 및8-선 계수율을 측정하기 위한 카운터회로를 위주로 설계하였으며, x-선 event의 에너지가 측정에너지를 벗어나거나 상승시간이 긴 신호는 anti-coincidence 회로를 통하여 제거되고, 그 계수율이 기록되도록 설계 제작되었다. 또한 신호처리회로에서 얻은 데이터는 telemetry를 통하여 serial 형태로 전송되어야 하므로 8086 microprocessor를 이용하여 데이터를 획득하고 전송하도록 하였다. 따라서 본 실험에서 제작된 신호처리회로의 기능 및 특성에 대해 논하고자 한다.

• Journal of Astronomy and Space Sciences
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• 제15권2호
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• pp.341-358
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• 1998

천문대 X-선 연구팀에서는 검출기 내부잡음을 줄이기 위해, 반-동시 계수법을 채택하는 다중 셀 비례계수를 개발할 예정이다. 이러한 계수기의 X-선 검출효율 결정을 위해, 몬테카를로 법을 이용하는 수치모의실험 프로그램을 개발하였다. 이 프로그램을 이용하여 Ginga/LAC의 검출효율을 재현할 수 있었고, 그럼으로 해서 수치모의 실험 방법에 대한 검증을 할 수 있었다. 이 논문에서는 천문대에서 고려하고 있는 비례계수기에 대한 수치모의실험 결과들을 보고한다.

• 한국의류산업학회지
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• 제22권3호
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• pp.296-309
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• 2020

Carol Christian Poell is a designer famous for experimental designs and presentations. Poell's actions in the fashion-world resemble Fluxus, an anti-art group that started working in the 1950s. This study analyzed the works of Poell based on the characteristics of Fluxus and then compared the works of Poell with the performance of Nam June Paik, a Fluxus artist. We conducted literature studies and case studies. We examined the works of Poell and Paik based on the four characteristics of Fluxus: iconoclasm, unity of art and life, playfulness and chance. The results were as follows. First, they were engaged in anti-aesthetic works. While Paik concentrated on the content aspect of works, Poell was more focused on formal aspects. Second, neither of them distinguished between art and life. Paik achieved it by including audiences in his works; however, Poell attained it by adopting daily spaces as a place to display presentations and use ready-made forms. Third, they showed playfulness with a satirical nuance. Paik expressed it in an erotic way; however, Poell implied it through the irrational settings of circumstance. Finally, they created works by utilizing chance. Paik focused on auditory elements and the content aspects of works; however, Poell used the coincidence of visual and tactile elements when creating his works. This study compared the works of Poell with Paik and has its significance in its usefulness to understand designers with Fluxus characteristics in the fashion industry.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2011년도 추계학술대회 논문집
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• pp.101-106
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• 2011

In the present paper, the phenomena of abnormal noise and vibration due to acoustic resonance of CFBC(Circulating Fluidized Bed Combustion) boiler was presented. The acoustic resonance which occurred in the gas path of CFBC boiler system was caused by coincidence of vortex shedding frequency of tube bank and acoustic natural frequency of duct and hopper. And, the phenomena of beating arose from the interference of two closed resonant waves at 66.4Hz and 70.8Hz. There are two control methods for acoustic resonance in this system. The first method is to change the vortex shedding frequency from the structural alterations on the tube bank. And the second method is to change the acoustic natural frequency of the gas path with the installation of anti-noise baffles. The second one which is relatively easy to apply, was adapted in this study. As a result, the noise and vibration level have been decreased by 41dB and 94% at 66.4Hz, respectively. And the improvement of noise and vibration at 70.8Hz was identified by sensory evaluation.

• 한국식품과학회지
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• 제46권3호
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• pp.269-275
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• 2014

메밀로부터 분리한 메밀단백질(BWP)을 토끼에게 면역하여 생산한 특이항체를 이용하여 가공식품 중 메밀의 검출을 위한 간접경합 효소면역측정법(ciELISA)을 확립하였다. 이때, BWP의 검출범위는 $0.05-100{\mu}g/mL$이었다. 특이항체 교차반응 결과, BWP, 메밀가루, 통메밀에 대한 반응성은 각각 100, 17.9, 11.8%를 나타내었으며 그 외 곡물 14종에 대한 반응성은 거의 나타나지 않아 메밀에 대한 특이성이 매우 높았다. 메밀가루는 $60-90^{\circ}C$에서 반응성이 평균 83.0%를 나타내었으며 $100^{\circ}C$에서는 44.5%로 반응성이 감소하였다. 메밀가루에 대한 spike test에서 메밀 생면, 삶은 면, 묵, 메밀곡물가루에서 평균 분석회수율이 각각 99.1, 98.6, 81.1, 104%로 매우 높게 나타났다. ciELISA에 의하여 22점의 시판시료 중 메밀의 함유량을 조사한 결과, 메밀 함유 표시된 12점에서 평균 분석회수율은 31.6%로 나타났으나 시료 중 메밀의 정성적 검출은 100%로 매우 우수하였다. 본 연구에서 개발한 ciELISA는 가공식품에 함유된 메밀을 검출하는데 매우 효과적으로 활용할 수 있을 것이다.

• Nuclear Engineering and Technology
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• 제34권6호
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• pp.545-552
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• 2002

We developed an ultra low background gamma ray spectrometer particularly suitable for experiment which require lower detection limit. The background of a germanium spectrometer is suppressed by applying active and passive shielding technique at the same time. The active shielding devices consist of plastic scintillating plates of 50 mm thick and anti-coincidence electronic system. The shielding is made of 150 mm thick walls of very low activity lead,20 mm with activity of <10 Bq/kg and 130 mm with activity of <50 Bq/kg. The observed background count rates are 1.2 $s^{-1}$ and 0.36 $s^{-1}$ without and with the active shielding, respectively, overall the energy regions from 30 keV to 3 MeV The cosmic ray induced background is suppressed by a rate of 0.8 $s^{-1}$ at the present work. The detection efficiency curve necessary to obtain the radioactivity of environmental samples has been precisely determined on the energy regions from 80 to 2000 keV with a 10$^3$ ml marinelli beaker sample, consisting of the calibrated radionuclides $^{109}$ Cd, $^{57}$ CO, $^{139}$ Ce, $^{203}$ Hg, $^{113}$ Sn, $^{85}$Sr, $^{137}$ Cs, $^{60}$ Co and $^{88}$ Y. Virtues Of the method are demonstrated by measuring the activity of $^{137}$ Cs contained in the powdered milk.