• The Journal of the Korea Contents Association
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• v.4 no.4
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• pp.33-43
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• 2004

In this paper, a traffic trend analysis based SNMP algorithm is proposed for improving the problem of existing traffic analysis using SNMP. The existing traffic analysis method has a vulnerability that is taken much time In analyzing by using a threshold and not detected a harmful traffic at the point of transition. The method that is proposed in this paper can solve the problems that the existing method had, simultaneously using traffic trend analysis of the day, traffic trend analysis happening in each protocol and MIB object analysis responding to attacks instead of using the threshold. The algorithm proposed in this paper will analyze harmful traffic more quickly and more precisely; hence it can reduce the damage made by traffic flooding attacks. When traffic happens, it can detect the abnormality through the three analysis methods previously mentioned. After that, if abnormal traffic overlaps in at least two of the three methods, we can consider it as harmful traffic. The proposed algorithm will analyze harmful traffic more quickly and more precisely; hence it can reduce the damage made by traffic flooding attacks.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.40 no.6
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• pp.1166-1174
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• 2015

There were the attempts to prevent the spread of harmful materials of the agri-food through the record tracking of the products with the bar code, the partial information tracking of the agri-food storage and the delivery vehicle, or the control of the temperature by intuition. However, there were many problems in the attempts because of the insufficient information, the information distortion and the independent information network of each distribution company. As a result, it is difficult to prevent the spread over the life-cycle of the agri-food using the attempts. To solve the problems, we propose the mechanism mainly to do context awareness, predict, and track the harmful materials of agri-food using big data processing.

• Journal of Adhesion and Interface
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• v.21 no.2
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• pp.51-57
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• 2020

Recently, there has been growing interest in the study of removal of harmful and hazardous pollutants emitted by industrial activities. In this study, we have developed porous activated carbon fibers prepared by a water vapor activation method and analyzed the adsorptions of the harmful gases with electrochemical responses of activated carbon fibers. To control the uniformity of pore structures, active reaction areas, and active sites, the reaction conditions of activation temperatures were varied from 750 to 850 ℃ with the predetermined reaction time intervals (30 to 240 min). The SO₂ and NO gas adsorptions of activated carbon fibers prepared by various reaction conditions were analyzed and monitored by electrochemical sensor responses. In particular, the activated carbon fibers prepared at the reaction temperature of 850 ℃ and time of 45 min showed the highest specific surface area (1,041.9 ㎡/g) and pore characteristics (0.42 ㎤/g), and excellent adsorption capabilities of SO₂ (1.061 mg/g) and NO (1.210 mg/g) gases, respectively.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.3
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• pp.135-140
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• 2020

Since the process gas that is essential in the semiconductor process is a harmful gas, it is an essential task to solve it in an environmentally friendly manner. Currently, the cleaning technology used in the semiconductor process is mostly a wet cleaning based on hydrogen peroxide developed in the 1970s, and the SC-1 cleaning liquid for removing particles on the surface uses a mixture of ammonia and hydrogen peroxide. Therefore, environmental problems are caused, and economic problems caused by excessive water use are also serious. For this reason, the products developed through this study are used to decompose the process harmful gas from the chamber outlet into a harmless gas before entering the vacuum pump, or by incineration and the gaseous components are deposited on the pump. I want to solve the problem. In this paper, CPS (Confined Plasma Source) is proposed to save environment and improve productivity by replacing harmful gases (N2, CF4, SF6⋯., Etc) which are indispensable in semi-contamination process with innocuous gases or incineration with plasma, to study.

• Journal of Digital Convergence
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• v.16 no.4
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• pp.185-194
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• 2018

The purpose of this study was to understand the dental hygienist's perception of dental materials and to understand the safety status of harmful chemicals. The study was conducted from January to February 2015 for 250 dental hygienists working in Gwangju Metropolitan City. as a result, the degree of recognition of MSDS for dental materials was higher with age (P <0.05) and higher in dental hygienist (P <0.001) working at dental hospital. (P <0.001), and the factors affecting the perception of first aid treatment were positively correlated with experience of hazard education (P <0.001). Therefore, by understanding the MSDS awareness of dental materials by dental hygienists and the safety situation in the handling of hazardous chemical substances, we provide basic data for establishing proper recognition of safety in the handling of harmful chemical substances and developing educational programs to prevent accidents.

• Biotechnology and Bioprocess Engineering:BBE
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• v.9 no.5
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• pp.389-392
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• 2004

In order to produce a harmful protein more efficiently, this expression cassette, dubbed pCol-MICT, is directed by the colicin promoter, and was constructed by the insertion of a $rrnBT_1T_2$ fragment of pEXP7, and a MxelnteinCBD fragment of pTXB3, into pSH375. To test whether harmful proteins, including proteolytic enzymes, could be effectively produced by this cassette, the carboxypeptidase (CPase) Taq gene was inserted into the pCol-MICT cassette to yield pCol-CPase Taq-MICT. E coli W3l 10 tells harboring pCol-CPase Taq-MICT produced a large quantity of this enzyme, as much as 47.2 mg of purified from per liter of culture, when cultured in the presence of mitomycin C ($0.4{\mu}g/mL$). This indicates that the colicin promoter-controlled E, coli expression cassette was able to produce almost 8 times of protein than the conventional tar promoter-based system, and that this cassette may be useful in the Synthesis of other harmful proteins.

• Journal of the Korean Home Economics Association
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• v.44 no.2 s.216
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• pp.25-36
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• 2006

This study examined the subcategories of the self concept of adolescent consumers, and investigated the influence of this self concept and the demographic characteristics on the evaluation and experience of adolescent entry into harmful places. The adolescent group was divided into 4 subgroups: (group I with negative evaluation and without entry experience, group II with negative evaluation but with experience;, group III with positive evaluation but without experience, and group IV with positive evaluation and with experience). The differences of demographic characteristic and self concept between these. subgroups were inspected. The results of this study were as follows. First, the self concept of the adolescent consumer consists of body self, social self, achievement self, scholarship self and family self. Among these self concepts, scholarship self was the highest, and family self was the lowest. Second, from the result of regression analysis using the demographic element as an independent variable to inspect the factors influencing self concept, sex, school year, living with parents, and economic status were statistically significant. Third, in case of entry evaluation, singing room was evaluated most positively among 10 places with a score of 4.20 and pub/drunkenness was evaluated most negatively. In case of entry experience, singing room was the most frequently experienced place and discotheque was the least. Fourth, with respect to demographic characteristics and influences of self concept, the influencing factors on entry evaluation were sex, school year, social self, and family self, and the influencing factors on entry experience were sex, school year, living with parents, social self, and family self. Finally, examination of the differences of demographic characteristics and self concept according to entry evaluation and experience, revealed the distinctive variables among the 10 harmful places to be sex, school year, living with parents, body self, social self, achievement self, scholarship self, and family self.

• The Korean Journal of Mycology
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• v.31 no.2
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• pp.53-58
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• 2003

Studies were conducted to investigate the changes of teleomorph of Diatrype stigma on bed-log of shiitake (Lentinula edodes) and appearance of secondary harmful fungi from December 1999 to August 2001. The color of stroma was changed from red brown to dark brown after 12 months. The size of ostioles became smaller and the number of ostioles decreased as time passed. Most of the ostioles disappeared after 20 months from toleomorph formation. Perithecia and ascospores were gradually disappeared, and perithecia containing ascospores were observed at 10% of bed-logs tested after 20 months. Concerning the secondary harmful fungi infecting the bedlog of shiitake after teleomorph of D. stigma, Hypoxylon truncatum (Anamorph : Nodulisporium sp.), Schizophyllum commune and Trichoderma spp. were observed on stroma of D. stigma. Penicillium sp. occurred on spore-horn of Libertella sp. (Anamorph of D. stigma). Besides, Hypoxylon howeianum and some species of Myxomycetes were observed. Also, Libertella sp. appeared again at some bed-logs.

• Journal of Preventive Medicine and Public Health
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• v.33 no.1
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• pp.91-98
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• 2000

Objectives : This study is to evaluate the awareness, attitude, practice and the countermeasures against passive smoking in Korean adults. Methods : By self-administered questionnaires, we assessed the knowledge, attitude, behavior for passive smoking and the countermeasure for reduction of it's harmful effects in 289 men and 238 women. Results : The subjects that have heard about passive smoking were 96.8% in total and well known were 26.4% of current smoker, 56.6% of ex-smoker, and 14.8% of non-smoker(p=0.001). The irritative symptom from passive smoking was the most frequent in non-smokers and the most common place where exposed to passive smoking was public place. For attitude against passive smoking in 'no smoking allowed area', ex-smokers were the most active to recommend to stop smoking. And for opinion about establishment of 'no smoking allowed area', the restriction by law was the best acceptable method in smokers, exsmokers, and nonsmokers. In marking of 'no smoking allowed area', 69.9% of smokers answered no smoking, but in non-marking area only 6.3% stop smoking. When smokers were recommended to stop smoking, the more subjects stop smoking with good feeling in marking area, but the less in non-marking area. The factor associated the high awareness of passive smoking were aged(OR=1.07, 1.03-1.12), men(OR=4.34, 2.32-8.46). The persons who have known well about passive smoking had good attitude and behavior to prevent of harmful effect of passive smoking. Conclusions : This study suggested that education program would be necessary to reduce the passive smoking.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.11
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• pp.5834-5840
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• 2013

Along with the development of high-speed, wired and wireless Internet technology, various harmful images in a form of photos and video clips have become prevalent these days. In this paper, we suggest a method of automatically detecting adult images by extracting woman's nipple areas which represent obscenity of the image. The suggested algorithm first segments skin color areas in the $YC_bC_r$ color space from input images and extracts nipple's candidate areas from the segmented skin areas through the suggested nipple map. We then select real nipple areas by using geometrical information and determines input images as harmful images if they contain nipples. Experimental results show that the suggested nipple map-based method effectively detects adult images.