• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.231-232
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• 2022

해상환경에 설치된 유·무인 표지는 관리 목적으로 정기적인 광학검사를 수행한다. 접근하기 용이한 위치에 설치된 표지의 경우 측정장비를 사용하여 검사를 수행할 수 있지만, 접근하기 힘든 해상에 설치된 표지는 측정선을 활용하여 검사를 수행한다. 측정선을 활용한 측정방법은 예산문제와 측정품질에 영향을 줄 수 있기 때문에 변화가 필요한 실정이다. 본 논문에서는 드론을 활용하여 유·무인 표지의 광도를 보다 쉽게 측정할 수 있는 방법을 연구한 내용이다.

• Journal of the Korean Society for Nondestructive Testing
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• v.23 no.2
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• pp.116-124
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• 2003

• 건강소식
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• v.11 no.3 s.100
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• pp.16-22
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• 1987

우리는 흔히 ‘살아있음’에 대한 가치를 망각한 채 그날그날을 보내버리고, 어느날 갑자기 우리 앞에 닥친 ‘건강에 대한 위협’이라는 놈 때문에 당황하며 또 더러는 좌절하게 된다. 심한 경우, 우리의 의지 따위(?)와는 관계없이 생명은 “죽음” 앞에 무릎을 꿇고 만다. 불가항력의 경우도 있기는 하지만 대개는 시기를 놓쳐버리는 때가 허다하므로 뒤늦게 후회해 보았댔자 무슨 소용이 있으랴. 어린이 심장병 집단검사만 해도 그렇다. 필요한 일이라는 것은 알지만 실천으로 옮겨지는 예는 드물다. 여기 선천성 심장병의 일종인 “동맥관개존증”이라는 병을 앓고있다가 학교에서 실시한 심전도 집단검사에서 조기발견하여 시기적절하게 치료를 끝내었고, 이제는 건강한 모습으로 미래를 향해 달음박질하는 한소녀를 소개한다. 혹시라도 건강에 관심을 두지 않았던 사람이 있다면 그 귀감이 될 수 있기를 바란다.

• Journal of Food Hygiene and Safety
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• v.14 no.4
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• pp.380-385
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• 1999

This study was performed to investigate the contents of sulfites in 2, 770 dried marine products in Seoul Chung-Bu market from March to October in 1999. Sulfites of the samples were determined by Zn powder reduction method and Monnier-Williams's modified method. Eight samples of 2, 770 (0.29%) were detected over 30ppm in SO2 contents by Monnier-Williams's modified method. In samples detected over 30ppm, six dried filefishes(130.2~573.4ppm) were imported from Vietnam, same kind of other one(114.2ppm) was from China and the other one Alaska pollack(196.3ppm) was domestic. By Zn powder reduction method, 259 dried marine products (259/2, 770=9.35%) were positive reaction (1-30ppm). These were 93 dried shrimps, 53 filefish meats, 34 dried squids, 33 slices of dried pollacks and 17 sea mussel meats. So sulfites must be use commonly to prevent black spot and preserve for many dried shrimps, filefishes meats, dried squids etc. According to results, the quality test for the imported dried marine products must be reinforced to supply safety food for the citizens.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2012.05a
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• pp.33-34
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• 2012

• Journal of the Korean Society of Food Science and Nutrition
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• v.30 no.5
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• pp.834-838
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• 2001

To investigate the effect of boiled-dried fusiforme for making kimchi, it was added as 0.1, 0.3 and 0.5% to brined Chinese cabbage by weight, respectively. Quality characteristics such as pH, titratable acidity, reducing sugar content, microbial loads were measured. Titratable acidity of 0.1% treatment showed a retarded increase compared to other samples, and maintained a higher reducing sugar content. Lactic acid bacteria numbers of boiled-dried fusiforme added kimchi were lower approximately by 2 log$_{10}$ CFU/mL after 10 day, which value was almost same as the control group. A 0.1% treatment of boiled-dried fusiforme showed no significant differences compared to the control in sensory evaluation.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.328-331
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• 2001

Shape changes of a workpiece in an Eulerian Finite Element analysis for the steady state. three-roll-stand shape rolling are modelled. Although an Eulerian analysis has many advantages for the steady state rolling problems, it necessitates an assumption about the unknown shape of the control volume. In almost all cases. the assumed control volume does not match the final shape and the control volume should be updated. This update can be accomplished by performing a free surface correction. The final shape of a material point, which has a spherical shape at the inlet, can be also predicted by integrating a deformation gradient along a stream line. Analyses of three-roll-stand shape rolling is in detail examined.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2000.04a
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• pp.129-133
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• 2000

환경대기중 입자상물질의 검사방법은 환경부고시 97-98호(97. 11. 5)에 의거 고용량공기포집법(high volume air sampler), 저용량공기포집법(low volume ai sampler), 광산란법 및 광투과법 그리고 $\beta$흡수법 등으로 되어 있다. 이중 고용량공기포집법, 저용량공기포집법, $\beta$흡수법등은 중량법의 범주에 드는 측정법으로 되어 있다. 이들 방법 중 먼지채취전후의 무게를 직접 칭량하여 분석하는 고용량공기포집법은 총부유먼지의 측정법으로, 저용량공기포집법은 $PM_{10}$의 분석에 이용되는 것이며 $PM_{10}$ 고용량공기포집기($PM_{10}$ high volume air sampler) 또는 $PM_{10}$ 분석에 이용될 수 있다. (중략)

• Journal of Radiation Protection and Research
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• v.29 no.1
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• pp.57-63
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• 2004

As a part of In-service Inspection works in a nuclear power plant, Eddy Current Testing through all the outage of nuclear power plants has been controlled by the radiation management. From the case study about the periodical ECT work, the exposed dose rate of worker has announced over the organized dose rate before the radiation work, it affects the personnel exposed dose management and radiation work permit issue. It is not easy to get some information about ECT related working hours, scope of work and how many workers to forecast the radiation working and the predict dose exposure. It should be need the data accumulation about ECT related radiation work to prepare the ALARA achievement and the radiation work plan for dose mitigation. We can discuss a few information about ECT related radiation working issue for the application of predict dose exposure on this paper.

• The Journal of the Acoustical Society of Korea
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• v.34 no.2
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• pp.138-145
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• 2015

Although it is well-known that environmental noise can lead to hearing loss in individuals, the true extent of subway noise effects in the general population remains poorly understood. The purpose of the present study is to see changes of acoustic reflex thresholds and speech perception scores when passengers listen to music presented from their personal listening device in the subway. Forty subjects with normal hearing participated being divided into two groups, experimental and control groups. As a baseline, all subjects were measured by acoustic reflex thresholds in five test frequencies and Korean speech perception in noise (KSPIN) test at 0 and -5 dB SNR. In the experiment, the control group read newspaper or magazine in the subway noise, whereas the experimental group listened to music presented from their smartphone under the subway noise through speakers at 73.45 dBA for 60 min. After completing the experiment, two groups also conducted both acoustic reflex thresholds and KSPIN tests in the same condition as the baseline. The results showed that there was a significant difference of correct percent in speech-in-noise test between experimental and control groups and of that between two signal-to-noise ratios, which means the double noise exposure of 60 min might cause some degradation of speech perception when noise increases compared to only subway noise condition that was not statistically significant difference. We concluded that a risk of some degraded speech perception ability would be expected when passengers have a habit of listening to music in the subway noisy situation for a long duration.