• Title/Summary/Keyword: 유해도

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생물학적 유해인자에 의한 건강장해와 노출평가방법(2)

  • Park, Dong-Uk
    • 월간산업보건
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    • s.192
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    • pp.15-21
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    • 2004
  • 최근 생물학적 유해인자의 노출로 인한 건강상의 노출평가방법에 대한 관심이 높아지고 있으며 앞으로도 더욱 커질 것으로 보인다. 이에 곰팡이, 박테리아, 엔도톡신을 중심으로 건강장해와 노출평가방법에 대해서 원고를 게재한다.

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생물학적 유해인자에 의한 건강장해와 노출평가방법(3)

  • Park, Dong-Uk
    • 월간산업보건
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    • s.193
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    • pp.14-21
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    • 2004
  • 최근 생물학적 유해인자의 노출로 인한 건강상의 노출평가방법에 대한 관심이 높아지고 있으며 앞으로도 더욱 커질 것으로 보인다. 이에 곰팡이, 박테리아, 엔도톡신을 중심으로 건강장해와 노출평가방법에 대해서 원고를 게재한다.

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Development of an Adult Image Classifier using Skin Color (피부색상을 이용한 유해영상 분류기 개발)

  • Yoon, Jin-Sung;Kim, Gye-Young;Choi, Hyung-Il
    • The Journal of the Korea Contents Association
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    • v.9 no.4
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    • pp.1-11
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    • 2009
  • To classifying and filtering of adult images, in recent the computer vision techniques are actively investigated because rapidly increase for the amount of adult images accessible on the Internet. In this paper, we investigate and develop the tool filtering of adult images using skin color model. The tool is consisting of two steps. In the first step, we use a skin color classifier to extract skin color regions from an image. In the nest step, we use a region feature classifier to determine whether an image is an adult image or not an adult image depending on extracted skin color regions. Using histogram color model, a skin color classifier is trained for RGB color values of adult images and not adult images. Using SVM, a region feature classifier is trained for skin color ratio on 29 regions of adult images. Experimental results show that suggested classifier achieve a detection rate of 92.80% with 6.73% false positives.

Antipathogenic Activity of Lactobacillus plantarum Isolated from Pickled Mulberry Leaf (뽕잎 장아찌로부터 분리된 Lactobacillus plantarum 균주의 유해균 증식 억제 활성)

  • Park, Eun-Hee;Kim, Myoung-Dong
    • Microbiology and Biotechnology Letters
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    • v.44 no.2
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    • pp.163-170
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    • 2016
  • Strains of lactic acid bacteria were isolated from a variety of fermented foods collected in Korea. The strain L2167 showed a strong antipathogenic activity against Bacillus cereus, Listeria monocytogenes, Salmonella Typhimurium, Staphylococcus aureus, and Staphylococcus epidermidis. L2167 was identified as Lactobacillus plantarum by sequence analysis of its 16S rRNA gene. Scanning electron microscopy revealed rough and wrinkled morphology of B. cereus, L. monocytogenes, S. Typhimurium, S. aureus, and S. epidermidis cell membranes after treatment with a crude cell extract of L. plantarum L2167, indicating that Lactobacillus plantarum L2167 might destroy the cell membrane of pathogenic bacteria. The optimal temperature and initial medium pH for Lactobacillus plantarum L2167 growth were 35℃ and 5.5, respectively. Lactobacillus plantarum L2167 was more sensitive to NaCl than Lactobacillus plantarum KCTC21004, used as a control strain. Lactobacillus plantarum L2167 is expected to be developed as a prominent starter strain for efficient inhibition of growth of pathogens.

Antibacterial Property of Ecklonia cava Extract against Marine Bacterial Pathogens (해양 유해세균에 대한 감태 추출물의 항균특성)

  • Kim, Ji-Hoon;Kim, Se-Bong;Hwang, Hye-Jin;Kim, Young-Mog;Lee, Myung-Suk
    • Journal of Food Hygiene and Safety
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    • v.31 no.5
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    • pp.380-385
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    • 2016
  • The object of this study was to evaluate antibacterial activity of edible seaweed extracts against marine bacterial pathogens including Edwardsiella tarda, Streptococcus iniae, Streptococcus parauberis, Vibrio anguillarum, Vibiro harveyi and Vibrio scophthalm, which are associated with human or fish infectious disease. Ecklonia cava methanolic extract showed a strong and broad spectrum antibacterial activity against marine bacterial pathogens used in this study. Among solvent-soluble fractions of the E. cava extract, the ethyl acetate (EtOAc) soluble fraction showed the strongest antibacterial activity against marine bacterial pathogens tested in this study with MIC in the range of $128-256{\mu}g/mL$. Furthermore, HPLC analysis revealed that the soluble fraction contains abundant dieckol, a phlorotannin compound, compared to other solvent soluble fractions, suggesting that phlorotannins including dieckol would be a key antibacterial agent against marine bacterial pathogens.

Design and Implementation of Harmful Video Detection Service using Audio Information on Android OS (안드로이드 OS 기반 음향 정보를 이용한 유해동영상 검출 서비스의 설계 및 구현)

  • Kim, Yong-Wun;Kim, Bong-Wan;Choi, Dae-Lim;Ko, Lag-Hwan;Kim, Tae-Guon;Lee, Yong-Ju
    • Journal of Korea Multimedia Society
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    • v.15 no.5
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    • pp.577-586
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    • 2012
  • The smartphone emerged due to the rapid development of the Internet has brought greater convenience to life in a positive manner. Recently, however, because of unconstrained exposure to harmful video, reckless use of smart phones has become a domestic issue in our society. In this paper, a service which detects harmful videos by using the acoustic information is designed and implemented on the Android OS. In order to implement the service of Android OS-based detection of the harmful movie, the speed of existing sound-based detection method for harmful videos is improved. The GMM(Gaussian Mixture Model) was used for classifier and the number of Gaussian Mixture was 18. The implemented service shows a detection rate of 97.02% for a total of 1,210 data files (approximately 687 hours) which comprises 669 general videos files (about 424 hours) and 541 harmful video files (about 263 hours). It's speed is 5.6 times faster than the traditional methods whitout reducing the detection rate.