• Nuclear Engineering and Technology
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• v.19 no.2
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• pp.107-114
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• 1987

Using a solution of $^{137}$ Cs as a tracer, radioactivity of a $^{137}$ Cs solution is measured by coincidence and anticoincidence counting methods. Sample sources in this study are fabricated by mixing $^{137}$ Cs with tracer, and the mixing ratios are 1/3 and 1/5, respectively in coincidence and anticoincidence methods. Specific activities of a $^{137}$ Cs solution are calculated by means of f-channel low energy threshold level variation and efficiency extrapolation. The results obtained by coincidence and anticoincidence counting methods are 552.78 kBq/g and 554.32kBq/g, respectively on the reference date and the combined uncertainties are 1.60kBq/g and 1.51kBq/g for each method. These two results show a good agreement within the uncertainty range.

• 월간 기계설비
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• s.258
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• pp.49-51
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• 2012

제8대 시 도회장이 새롭게 구성됨에 따라 전국 시 도회는 시 도회장을 중심으로 본격적인 활동에 들어갔다. 본지는 향후 3년간 시 도회를 이끌어갈 전국 시 도회장으로부터 사업계획을 들어 보는 자리를 마련했다. 이번호에는 선비 스타일의 김석환 경기도회 회장을 만나보았다.

• Korean Architects
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• s.498
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• pp.14-14
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• 2010

• Journal of Digital Convergence
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• v.17 no.8
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• pp.429-437
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• 2019

This study examined diverse capital dynamics and the effect of the dynamics on the quality of life of Korean baby boomers living in Jeonju. Also this study investigated the moderating effect of birth cohort. A structural equation modeling conducted with 303 baby boomers for verification. The results are as follows: First, the human capital of baby boomer directly or indirectly affected psychological, economic, social capital, and quality of life. Second, economic capital directly or indirectly affected psychological, social capital, and quality of life. Third, psychological capital directly or indirectly affected social capital and quality of life. Fourth, social capital affected the quality of life. Fifth, the birth cohort moderated the impacts of economic capital on psychological capital and quality of life. The results provided an understanding of the quality of life of baby boomer and the direction of intervention.

• 대한방사선방어학회:학술대회논문집
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• 2009.04a
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• pp.196-197
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• 2009

• Proceedings of the KSMRM Conference
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• 2003.10a
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• pp.21-21
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• 2003

목적： 악성뇌종양 주변부위의 역동자기공명영상에서의 시간신호강도곡선 양상으로 종양의 성장 양상이나 예후를 판단할 수 있는지를 알고자 한다. 대상 및 방법： Anaplastic oligodendroglioma 3예, Anaplastic astrocytoma 1예, Glioblastoma multiforme 1예, Malignant ependymoma 2예, Medulloblastorna 1예로서, 총 8예의 종양절제전, 혹은 후의 잔류 종양을 대상으로 하였다. Routine MRI에 추가하여 종양부위에서 Turbo spin echo T1 강조 역동자기공명영상을 하였으며, Gd-DTPA 0.1 mmol/kg를 급속 주사 한 후, TR/TE, 350/15, slice thickness 6 mm, slice number 3, NEX 2회, scan time은 15 초로 하여 5 분 동안 20회 영상을 얻었다. 가시적으로 조영증강이 없는 종양의 주변부위나 수술경계부위에 관심영역을 그려서 시간신호강도곡선을 얻었으며, 첫 회 조영제 통과시의 peak 이후에 신호가 감소하는 경우를 Normal pattern으로, peak 이후에 신호가 계속 유지되거나 증가하는 경우를 Tumor pattern으로 하였으며, Normal pattern과 Tumor pattern을 보인 예들을 구분하여 종양의 재성장 상태와 환자의 생존 기간을 비교 관찰하였다.

• Journal of Radiation Protection and Research
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• v.22 no.3
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• pp.219-226
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• 1997

Ultralow background gamma-ray measurement system was installed to measure and analyze gamma-rays emitted from environmental and swipe samples. The background reduction techniques applied on this system are the passive shielding to surround the HPGe detector, an active external anticosmic shield to shield cosmic-rays and the nitrogen gas supply to minimize the introduction of ubiquitous radon decay nuclei. The performance test result showed that the system background at energies between 50 keV and 2 MeV is reduced about $10^{-2}$ order and the MDA is so low as to be suitable for the environmental sample analysis. But it is appeared that the neutron produced by cosmic-ray increases the background at low energy region.

• 가정의 벗
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• v.37 no.3 s.427
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• pp.26-27
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• 2004

우리나라의 국제적인 항구 도시인 부산은 월드컵, 아시안게임 등 국제 규모의 축제를 성공적으로 개최한 역동적인 에너지를 가진 도시이며 세계의 물류와 문화가 활발하게 교류하는 동북아시아의 물류$\cdot$금융 중심도시로 도약하는 희망의 도시입니다. 특별한 이 도시에 대한가족보건복지협회 부산광역시지회가 자리잡고 있으며 가족계획사업, 청소년$\cdot$가정복지사업, 모자보건사업, 재가노인복지사업, 여성건강클리닉, 취학 전

• Sijohaknonchong
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• v.42
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• pp.93-115
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• 2015

Dynamics of Sijo was regarded as a genre of 'closed nature' once. But ironically thanks to the 'closed nature', today dynamics of Sijo is refocused in diverse fields. Sijo is quoted not only in its original field of literature, but also in writing study. Quite remarkably, it is often referred to in the field of literary therapy, further in emotional healing. This article discussed the dynamics of Sijo as a manifestation of emotion especially called Gamsung in the process of the refocus. It is to show effectively that as a literary genre, Sijo can interact and share what is reasonal as well as what is emotional and sentimental in a poem as an emotional container beyond the lyricism Sijo has. Of course, it is also clear that the concept of lyricism may limit the dynamics of Sijo itself. Thus, the key word 'Gamsung' mainly referred to in this article was used to show the dynamics which Sijo has as much as possible, overcoming the limitation. That is, the purpose of the study is to prove that Sijo is the genre to represent human emotion most dynamically by reviewing the reasonal aspect of Sijo in addition to its emotional disposition which has been estimated to focus on sentiment or emotion. In the process of reinterpreting the structure of Sijo, the specific analysis on such emotional disposition and reasonal aspect was conducted by structurizing that as '(1) Facing, (2) Feeling dynamical, (3) Interpellating by feeling, and (4) feeling by sensation'.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.1
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• pp.53-58
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• 2008