• Journal of Navigation and Port Research
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• v.44 no.6
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• pp.488-493
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• 2020

In this study, we sought to establish a vessel-discharge pollutant-treatment system recommended by IMO by first investigating advanced facilities overseas to help us understand and evaluate our domestic facility and needs. IMO recommends the installation and operation of port pollutant-storage facilities to adequately treat pollutants emitted by ships entering the port, and we reviewed the registration and operation of these facilities in IMO member countries, focusing on the IIII Code. Due to recent environmental regulations, additional facilities are required to treat the washing water discharged from equipment such as scrubbers mounted on the ship so pollutant-storage facilities must be established. Currently, Korea's ship-discharged wastes are being moved from ports to land waste-treatment plants, and their quantity and properties are not being monitored. Therefore, in this study, we improved monitoring of the discharged pollutants and investigated the proper arrangement of pollutant storage facilities as recommended by IMO. The system we established can help provide smooth service to incoming ships - and appropriate treatment of pollutants and will greatly benefit international maritime operations.

• The Journal of Internal Korean Medicine
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• v.41 no.6
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• pp.1191-1199
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• 2020

We studied the effect of Korean medicine treatment on the clearance of vancomycin-resistant enterococcus (VRE) colonization and on improvement in symptoms in a stroke patient. The patient was continuously followed up with stool VRE cultures while being treated with herbal medicine, Chunglijagam-tang, acupuncture, and oxygen therapy. We also checked the coccygeal pressure sore condition and the oxygen levels during therapy. No VRE colonization was found after treatment and the oxygen levels and pressure sores had improved. This study proved that Korean medicine treatment could be effective for the clearance of VRE colonization and improvement of symptoms.

• The Journal of the Korea Contents Association
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• v.20 no.12
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• pp.1-12
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• 2020

The study is to analyze the value of satisfaction of instructional process to university students and to verify the relationship between the factors that how students make the team for class activity and instructional effect. According to this, the purpose of this study is to analyze the effect of lecture-based instruction and the project-based learning and verify the component factor of project-based learning so that this study can suggest various ways to participate in classes actively. For this study, the students participating in the classes from this researcher were selected and it was analyzed with quantitative and qualitative research. The qualitative research was in progress for 15 weeks class from September to December 2019 and the survey was done at the last day of 15 weeks class and project. Frequency, difference, correlation and regression analysis were conducted through SPSS 23.0 with 80 copies of the questionnaire. The result of this study, at first, the instructional effect and satisfaction of satisfaction on project-based learning is higher than teacher-centered instruction. Second, the team cohesion and team-work is giving a huge impact on instructional effect and satisfaction. At last, project-based leaning makes students participate in the class. Enjoy and satisfy in the course of class participation regardless of the result. Based on these findings, we are looking for the ways to use the project-based leaning and provide the objective data for the planning and production of class program to improve the effectiveness of the class. In addition, we discussed the implications and limitations of this study as well.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.31 no.3
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• pp.103-111
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• 2021

Hexagonal shape Si crystals were grown by the mixed-source hydride vapor phase epitaxy (HVPE) method of mixing solid materials such as Si, Al and Ga. In the newly designed atmospheric pressure mixed-source HVPE method, nuclei are formed by the interaction between GaCl_n, AlCl_n and SiCl_n gases at a high temperature of 1200℃. In addition, it is designed to generate a precursor gas with a high partial pressure due to the rapid reaction of Si and HCl gas. The properties of hexagonal Si crystals were investigated through scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), high-resolution X-ray diffraction (HR-XRD), and Raman spectrum. From these results, it is expected to be applied as a new material in the Si industry.

• (The)Study of the Eastern Classic
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• no.41
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• pp.385-406
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• 2010

Lee Byeong-hun was introduced to Hanjuhak when he was taught by Myeonwoo Gwak Jong-seok. It is assumed that Hanjuhak circles had a certain influence on formation of his ideas in that they had liberal tendency at that time. Lee Byeong-hun accepted Geummungyonghak developed by Gang Yu-wee of China and participated in Confucian Science Movement while excluding Confucianism. After he accepted western civilization and the ideas of Gang Yu-wee, no traces of Hanjuhak was found in his writing, but it is assumed that Hanjuhak might work as a nutritious element for his ideas. He thought that religious nature of Confucianism could be revived only when he left Neo-confucianism which changed Confucianism into a philosophy by insisting reason instead of God. So, he respected Confucius as a religious founder and left such concepts as reason and respect which were considered important in Neo-confucianism and valued disposition and faith in "Jungyong", a doctrine of the Mean. He considered Confucianism as religious and joined in religious practices such as praying and reciting scriptures. He insisted that filial piety indicates a filial son of the Heaven when interpreting the following passage: Shun (Chinese leader) is a filial duty, which is assumed that he was influenced by Christianity. He respected Confucius as the only religious founder and God as the God to make Confucianism a religion. It is believed that he considered only Confucius as a founder instead of traditional Confucian sages as religion such as Buddhism and Christianity has one founder. God he thought is related with the God in Christianity and furthermore accepted reincarnation of Buddhism which is contrary to Confucian ideas. According to "Gyeongseol" by Lee Byeong-hun, it was believed that he was engaged in religion based on a faith that Confucianism is a religion rather than he pursued Confucianism as a religion to find out a way of its survival.

• Journal of Korean Academy of Oral Health
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• v.41 no.4
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• pp.296-302
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• 2017

Objectives: The water fluoridation program has been implemented since 2008, in a region of Geoje City. This study aimed to evaluate the effectiveness of the water fluoridation program on caries prevention in the permanent dentition. Methods: Evaluation surveys were conducted on 8-, 10- and 12-year-old children in the fluoridated and non-fluoridated regions of Geoje City, in 2015. The survey included 834 children from the fluoridated regions and 703 from the non-fluoridated regions. The data obtained from the survey were analyzed using the IBM SPSS statistical package version 23.0. The effectiveness of community water fluoridation in caries prevention was estimated by the differences in the decayed, missing, filled teeth (DMFT) and decayed, missing, filled surfaces (DMFS) scores, between the program and control groups. The mean numbers of fissure-sealed teeth and surfaces were adjusted to reduce their confounding effect. Results: The mean DMFT and DMFS scores (0.69 and 0.91, respectively) of 10-year-olds from the fluoridated regions, after adjusting for the numbers of fissure-sealed teeth and surfaces, were significantly lower than those of the 10 year olds (DMFT: 0.95, DMFS: 1.32) from the non-fluoridated regions. The effectiveness of water fluoridation on caries prevention in the permanent dentition, estimated based on the differences in the mean DMFT and DMFS scores, adjusted for the number of fissure-sealed teeth and surfaces, between the program and control groups of 10-year-old children, was 27.4% and 31.1%, respectively. Conclusions: These results suggest that the effectiveness of water fluoridation on caries prevention in the permanent dentition, in Geoje City was so high that this program should be implemented in other regions in Korea as well.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.21 no.4
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• pp.61-75
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• 2011

Recently, there is significant increasing of massive attacks, which try to infect PCs that visit websites containing pre-implanted malicious code. When visiting the websites, these hidden malicious codes can gain monetary profit or can send various cyber attacks such as BOTNET for DDoS attacks, personal information theft and, etc. Also, this kind of malicious activities is continuously increasing, and their evasion techniques become professional and intellectual. So far, the current signature-based detection to detect websites, which contain malicious codes has a limitation to prevent internet users from being exposed to malicious codes. Since, it is impossible to detect with only blacklist when an attacker changes the string in the malicious codes proactively. In this paper, we propose a novel approach that can detect unknown malicious code, which is not well detected by a signature-based detection. Our method can detect new malicious codes even though the codes' signatures are not in the pattern database of Anti-Virus program. Moreover, our method can overcome various obfuscation techniques such as the frequent change of the included redirection URL in the malicious codes. Finally, we confirm that our proposed system shows better detection performance rather than MC-Finder, which adopts pattern matching, Google's crawling based malware site detection, and McAfee.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.20 no.4
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• pp.41-52
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• 2010

Message authentication is an essential security element in vehicular ad-hoc network(VANET). For a secure message authentication, integrity, availability, privacy preserving skill, and also efficiency in various environment should be provided. RAISE scheme has been proposed to provide efficient message authentication in the environment crowded with lots of vehicles and generally considered to be hard to provide efficiency. However, as the number of vehicles communicating in the area increases, the overhead is also incurred in proportion to the number of vehicles so that it still needs to be reduced, and the scheme is vulnerable to some attacks. In this paper, to make up for the vulnerabilities in dense vehicular communication network, we propose a more secure and efficient scheme using a process that RSU(Road Side Unit) transmits the messages of neighbor vehicles at once with Bloom Filter, and timestamp to protect against replay attack. Moreover, by adding a handover function to the scheme, we simplify the authentication process as omitting the unnecessary key-exchange process when a vehicle moves to other area. And we confirm the safety and efficiency of the scheme by simulating the false positive probability and calculating the traffic.

• Journal of Environmental Impact Assessment
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• v.29 no.6
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• pp.453-466
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• 2020

The addition and evaluation of health impact items in Environmental Impact Assessment document are written in hygiene and public health items only for specific development projects and are being reviewed. However, after the publication of the evaluation manual on the addition and evaluation of health impact items in 2011, there is a demand for continuous methodology and improvement plans despite partial improvement. Therefore, in order to propose a methodological improvement of the evaluation manual, this technical paper identified detailed improvement requirements based on the consultation opinions on hygiene and public health items, and investigated and suggested ways to solve this problem by reviewing the contents of the research so far. As for the improvement requirements, the contents related to mitigation plan, post management, effect prediction, assessment, and present-condition investigation were presented in Environmental Impact Assessment documents for the entire development project at a frequency of 93%, 85%, 80%, 74%, and 67%, respectively. Particularly, the detailed improvement requirements related to mitigation plan consisted of an establishment direction and a management of development project. Considering the current evaluation manual and the frequency of improvement requirements, this paper proposed concrete methods or improvement plans for major methodologies for each classification of hygiene and public health items. Furthermore, a comprehensive evaluation methodology related to whether a project is implemented was proposed, which is not provided in the current assessment manual.

• The Korean Journal of Food And Nutrition
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• v.33 no.6
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• pp.655-665
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• 2020

In this study, chemical information on a total of 20 individual compounds was constructed to identify isoflavones from the previous reports related with used parts(seeds, leaves, stems, pods) and products of soybean(Glycine max L.). Through constructed library and UPLC-DAD-QToF/MS analysis, a total of 19 individual isoflavones including aglycones, glucosides, acetylglucosides and malonylglucosides as major compounds was identified and quantified from 14 selected soybean seeds. Among them, genistein 7-O-(2"-O-apiosyl)glucoside and genistein 7-O-(6"-O-apiosyl)glucoside(ambocin) were identified tentatively as novel compounds in soybean seeds. Besides, among malonylglucosides, glycitein 4'-O-(6"-O-malonyl)glucoside was estimated for the first time. Total isoflavone contents were distributed from 240.21 to 445.21(mg/100 g, dry matter) and 7-O-6"-O-malonylglucosides were composed of 77.8% on total isoflavone as well as genistein derivatives were confirmed as major class. It was considered importantly that the development of isoflavone-rich varieties was necessary to strengthen their effects such as anti-inflammation, anti-cancer and menopause mitigation. The qualitative and quantitative data presented precisely in this study could be help to select and breed isoflavone-rich varieties. Furthermore, their basic isoflavone profile is expected to be applied to estimate the change of isoflavone conjugates on bioavailability after soy food supplements.