• Nuclear industry
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• v.37 no.7
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• pp.94-97
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• 2017

서울대 원자력정책센터에서는 7월 13일 서울 금호고에서 진행된 김익중 교수(동국대학교 의과대학 미생물학교실) 강연의 주요 내용을 보도한 <조선일보>의 7월 15일과 7월 17일 기사 내용 중 원자력의 위험성에 관련된 주요 내용에 대하여 기술적인 확인을 하고 그 결과를 홈페이지에 올렸다.

• 베이커리
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• no.8 s.373
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• pp.80-81
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• 1999

• Proceedings of the Korean Society of Tobacco Science Conference
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• 2005.05a
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• pp.31-31
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• 2005

• Journal of the Korean Society of Tobacco Science
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• v.29 no.1
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• pp.52-57
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• 2007

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.10a
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• pp.133-134
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• 2009

• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.87-88
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• 2016

본 논문에서는 현재 서비스 중인 지자기를 이용한 위치인식 서비스를 더울 효율적이고 정확하게 이용하기 위해, 스마트폰 카메라 기능을 이용한 이미지 인식 서비스 기술을 융합하여 상호 보완적이고 완성적인 실내 위치인식 서비스 시스템을 제안하고자 한다. 본 시스템은 스마트폰 카메라와 지자기 센서를 이용하여 특정 인프라 구축 없이 데이터 분석만으로 실내 측위 시스템 구현을 목표로 한다.

• 한국정보교육학회:학술대회논문집
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• 2004.01a
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• pp.27-34
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• 2004

오늘날 아동들은 수많은 글을 올리고 읽으면서 웹 서핑을 한다. 어떤 글들은 웹사이트의 성격에 맞는 글인가 하면, 때로 대단히 공격적인 글들도 있다 순전히 자발적으로 개시하는 아동들의 글에 교사가 의도적인 답변을 하면서 게시판에 오르는 아동들의 글을 조사하고, 교사의 답변에 아동들은 얼마나 신속하게 대응하며, 학습태도와 학업성취도에 영향을 미치는지 분석하였다. 아울러 웹사이트 게시판에 올리는 아동들의 게시물에 교사가 지속적으로 대응하여 학업성취도 변화 정도를 고찰하고 학습태도를 변화시켜 학업성취도가 향상되게 유인하였다.

• Journal of Dental Rehabilitation and Applied Science
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• v.21 no.2
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• pp.143-151
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• 2005

The purpose of this study was to evaluate the most effective method for repairing the exfoliated resin teeth. The specimens were divided into five groups according to repair method and presence of retention holes. The groups were as follows Group1 : Control group Group2 : Sprinkle method with no retention holes Group3 : Sprinkle method with retention holes Group4 : Flask method with no retention holes Group5 : Flask method with retention holes The results were as follows. 1. According to shear bond strength, the value decreased in the order of group1, group5, group3, group2, group4 and there were significant difference between, each group except between group1 and groups5, group2 and group3, group2 and group4(p < 0.05). 2. According to observations of the exfoliation surface, group2 and 4 showed more failure in the denture base resin and repair resin interface, but in group1, 3 and 5 there were more mixed failures. From the results above, there were no significant difference between repair methods without retention holes. But when comparing groups with retention holes, the flask method showed significantly improved results compared to the sprinkle method. Especially, group5 showed similar results as the control group.

• Journal of the Korean Society of Tobacco Science
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• v.28 no.2
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• pp.130-135
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• 2006

This study was carried out to improve the analytical methods for determination of organic acids in tobacco leaf by HPLC. The samples for HPLC analysis were pre-treated by means of SPE. The calibration curve for each acid was linear and $R^2$ values ranged from 0.9990 to 1.0000. The limit of detection were obtained from the calibration curves and their values were between 1.39 to $4.87{\mu}g/mL$. Recovery rates of organic acids were between 88.6 % to 98.5 %. The concentrations of organic acids among the various tobacco leaves were compared to the concentration of organic acids, were in the order oriental, burley, flue-cured tobacco. In the case of flue-cured and oriental tobacco leaves, the order of concentration of organic acids was malic acid, oxalic acid, citric acid. But in the case of burley tobacco leaves, the order of concentration of organic acids was citric acid, oxalic acid, malic acid.

• Journal of the Korean Society of Tobacco Science
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• v.28 no.2
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• pp.152-157
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• 2006

A new procedure has been developed for the quantitation of aromatic amines in mainstream cigarette smoke. Two solid-phase extraction (SPE) clean up steps, using a different retention mechanisms, are required to process the samples. The first step used a cation-exchange cartridge, followed by a second step that used a cartridge with a hydrophobic retention character. The aromatic amines eluted from the second SPE cartridge are derivatized with pentafluoropropionic anhydride. This new method have advantages over other reported techniques, being sensitive, robust, and easily automated. The detection limits were ranged from 0.12 ng/mL for 1-aminonaphthalene to 0.16 ng/mL for 3-aminobiphenyl and the recoveries were from 97 to 106%. Compared with other reports for analysis of 2R4F reference cigarette, this method shows a close analytical data and good repeatability.