Treatment of Radioactive Liquid Waste by the Forced-AirCirculation System

Tae-κuk Kim,IL Sik Kang,Jong-Sik Shon,Young-Gerl Ryu,Won-Hyuk Jang,Sang-Min Bae,Young-Yong Ji,Dae-Seok Hong,Kyung-Kil Kwak 한국방사성폐기물학회 2011 한국방사성폐기물학회 학술논문요약집 Vol.9 No.2

Switched Reluctance Motor의 진동, 소음 특성해석에 관한 연구

정태욱,최태완,이태환 진주산업대학교 2000 산업과학기술연구소보 Vol.- No.7

Switched reluctance motor(SRM) drive system is to be compatible for wide range adjustable speed motoring system because it has the same driving characteristics of DC series motor, easy control principle and high efficiency characteristics. By this reason, SRM drive system will be applied to many commercial adjustable speed application that requires economic advantages and high performance abilities. But, SRM drives generate large vibration and acoustic noise because it is rotated by step pulse mmf and switching commutation mechanism. This disadvantage has been obstacles to applicate SRM drives as generalized motor drive system. The main origin of vibration and noise is caused by commutation method which applies step pulse waveform mmf to stator pole and removes the mmf suddenly. This sudden variation of stator flux vibrates stator frame by radial direction and excites natural vibration mode of stator. This paper analyzes the characteristics of vibration and acoustics noise of SRM from the viewpoint of natural mode and driving coidition, and consider the reduction strategy of that.

이동 애드 혹 네트워크에서 QoS를 지원하는 AODV 라우팅 프로토콜

吳世德,趙榮泰,丁燦赫,金玄郁,李光培,姜景仁,朴京培,文泰洙,郭承郁,河載承 明知大學校 産業技術硏究所 2003 産業技術硏究所論文集 Vol.22 No.-

Abstract - In this paper, we propose a bidirectional mobile Ad Hoc routing protocol based on AODV(ad-hoc on-demand distance victor routing) with QoS(quality of service) support. At presence, wireless mobile communication focuses on how to efficiently support mobility of users more than QoS guarantee. However, in order to satisfy requirement of various applications which have been or will be served, QoS guarantee between end point is a very important issue. The existing AODV routing protocol is implemented to use only BE (Best Effort) service. However, actual wireless mobile environment requires to reduce a waste of communication resources and meet with the real-time change of data paths by setting up routes with QoS support, considering available communication resources at each node in advance. Therefore, in this thesis, we propose an adaptive QoS support method using hello message in order to rapidly meet with the change of available communication resources and to smoothly perform route maintenance. For performance evaluation, we analyzed the average date reception rate. At that time, we used evaluation parameters such as node's mobility -stop time, hello message period, and packet priority, considering the node's mobility and the number of best effort/QoS data flows. As results, we found that with our proposed method the average data reception rate was increased 16.3% for 0 mobility-stop second case and 4.7% for 300 mobility-stop second case.

위험평가(Risk Assessment)에 의한 업종별 위험(Risk)의 구분

박동욱,박덕묵,정광수,윤충식,김태형,노영만,이경남,이송권,김현욱 한국산업위생학회 2003 한국산업보건학회지 Vol.13 No.2

A total of 514 workplaces in 17 industries were inbestigated through walk-through survey. These industries were all small companies with less than five workers and didn't have work environmental measurement data. These industries were ranked by risk that was evaluated by combination of toxicity and possibility of exposure to chemical hazardous agents produced at operations of industry. Risk Index(RI) was qualitatively combined by the combination between hazard and potential of exposure to chemical hazardous agents. Industries that were regarded as having the highest risk were wood and products of wood, chemicals and chemical products, basic metals, other vehicles, trailers and semi-trailers, and fumiture manufacturing. These industries were found to have operations with higher risk than other industries. This study found that more attentions should be paid to these industries with that more attentions should be paid to these industries with high risk.

人間資源開發의 理論과 實際에 關한 小考

金億煥,孫泰根 건국대학교 교육대학원 1981 敎育論叢 Vol.1 No.-

Today, the production process of a highly developed industrial society does not only observe the importance of physical production but also sees the magnitude that demands the human resource development which has the inevitable interrelationship over the total production and consumption process. Now, Korea is just getting out of one of developing nations and she is in the middle of endeavoring to reach the line of advanced nations. For the human resource development in Korea, therefore, it would be adequately justifiable that she must attempt and implement the human resource development according to a newly demanding concept of activity from the standpoint that she is developing further form the previous effort of partial job training, education and development. From this study, to begin with the concept and definition of human resource development, the background setting and needs were observed. The process of historical development in the human resource development(HRD) was also briefly reviewed and then the activity area of HRD was lastly studied. In introducing and discussing the theory and practice of human resource development, this paper will contain two parts for the study. Therefore, this study will be part Ⅰ and part Ⅱ will be written later centering the role and methodology of human resource development.

宗廟 佾舞의 舞員에 관한 考察

권태욱 한국음악사학회 2002 한국음악사학보 Vol.29 No.-

In Korea there have been two kinds of theory on the number of ritual dancers, known as ilmu 佾舞, at the Royal Ancestral Shrine (Chongmyo 宗廟), in which the Sacrifice to Royal Anscestors now held annually in May at Chongmyo in Seoul. Its two kinds of theory was originated from China. One theory was established by Tu Yu¨ 杜預, while the other one, by Fu Ch'jen 服虔. The Tu Yu¨'s theory is based on the fact that the number of ritual dancers must consist of eight dancers for each line, so that the ritual dance for Chinese emperor 天子 consists of 64 dancers (8×8) called p'arilmu 八佾舞, and the ritual dance for fuderal lords 諸侯, of 36 dancers (6×6 : yugilmu 六佾舞). On the other hand, according to the Fu Ch'ien's theory, however, the p'arilmu consists of 64 dancers (8×8) for the retual dance for Chinese emperor, and the yugilmu consists of 46 dancers (8×6) for fuderal lords including Korean kings. The Fu Ch'ien's theory was accepted in such Korean literary sources as Koryo˘sa 『高麗史』 and Sejong sillok 『世宗實錄』, Kukcho oryeu˘i 『國朝五禮儀』, and Akhak kwebo˘m 『樂學軌範』. The Koryo˘sa and Sejong sillok shows that the number of ritual dancers at the Royal Ancestral Shrine was 46 dancers during the Koryo˘ period and the reign of King Sejong 世宗 (1418-1450). From the reign of King So˘ngjong 成宗 (1469-1494) onwards, however, the number of ritual dancers at the Royal Ancestral Shrine has followed the yugilmu tradition by the Tu Yu¨'s theory, i.e. 36 dancers until the fall of Choso˘n dynasty (1393-1910). This is the reason why all introductory books and encyclopedia of Korean music, follows the Tu Yu¨'s theory. Thus, in the current introductory books and encyclopedia of Korean music it is written that the number of dancers at Royal Ancestral Shrine consisted of 36 dancers during the whole Choso˘n period. In viewing of an extensive and intensive investigation, the author pointed out in his conclusion that the 36 dancers by the Tu Yu¨'s theory should be rewritten on the basis of the 46 dancers by the Fu Ch'ien's theory during the Choso˘n period.

혐기성 소화처리에 있어서 중금속 영향

엄태규,이성욱 慶星大學校 環境問題硏究所 1995 環境硏報 Vol.5 No.1

Influence of heavy metal on anaerobic digestion were investigated by laboratory scale continuous experiments at 35℃. In case of Pb , gas production due to the quantity of heavy metal accumulated in the sludge of reactor is decreased by 30% when accumulation becomes 4.0㎎ of Pb in unit VSS. But it stops when Pb accumulates to 5.7㎎ of Pb in unit VSS. We realize that heavy metal has much more effect on methane forming bacteria than on acid forming bacteria through increasing tendency of TOA concentration. In case of Cr , When accumulation become 5.6㎎ per gram of sludge, the rate of gas production is deceased by 30% and it is decreased by 50% when unit of sludge was accumulated about 15.0㎎ per gram of sludge. Degree of inhibition by anaerobic bacteria which varies with the accumulative quantity of heavy metal is effecting order of Cd , Cr and Pb . What is specially note worthy is that Pb and Cr have great influence on the inhibition degree, whereas Cd has litter influence on it.

MR Spectroscopy로 진단한 Leigh 병 1례

황성욱,황태규,김용우 인제대학교 2006 仁濟醫學 Vol.27 No.-

Leigh syndrome is a progressive and degenerating central nerve system disease with symmetrically localized necrotic changes on the both gray and white matter, called subacute necrotizing encephalopathy. The causes of this disease have been revealed that defect of various enzymes (pyruvate dehydrogenase, repiratory complex Ⅰ, Ⅳ, Ⅴ, etc.)related to mitrochondrial carbonate metabolism and energy generating mechanisms. The clinical course is variable, and symptoms such as non-specific- seizure, respiratory failure, nystagmus, decreased muscle tone, developmental delay, vomiting and lethargy etc. appeared. And the diagnostic tool is not clear, so the diagnosis is difficult. Brain MRI and MR spectroscopy have been used to diagnose Leigh syndrome. We experienced 1 case of Leigh syndrome with typical MR, MR spectroscopic findings. MRI shows the lesions on midbrain, both basal ganglia, caudate nucleus, putamen, periaqueductal area, and periventricular white matter. MR spectroscopic findings showing high lactate peak were appropriate to Leigh disease. The patient is a 16-month-old girl with generalized weakness, and died within 1 month after first admission on our hospital. We report this case with typical MR spectroscopic findings.

정신과에서의 뇌파

전태연,양완석,이경욱,채정호 한국의학사 2004 診斷과治療 Vol.24 No.1

Polychlorinated Biphenyl 毒性에 미치는 人蔘 및 Riboflavin tetrabutylate의 影響

尹泰圭,洪思澳,趙台淳 成均館大學校 科學技術硏究所 1983 論文集 Vol.34 No.1

The effects of ginseng extract, riboflavin tetrabutylate(B_2-but.) and vitamin E on toxicity of polychlorinated biphenyls(PCB) were examined in rabbits. Serum total lipid and TBA value were markedly increased by PCB administration in the experimental animals. However, the administration of Ginseng extract or B_2-but. significantly inhibited the elevation of serum total lipid as well as TBA value. The activity of δ-aminolevulinic acid dehydrase in red blood cells was also significantly stimulated by PCB and this stimulation was inhibited by the administration of Ginseng extract. Furthermore, the elevations of the activities of serum GOT and GPT by PCB were also prevented by the administration of Ginseng extract and B_2-but.