• Steel and Composite Structures
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• v.11 no.4
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• pp.273-290
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• 2011

In current ductility-based earthquake-resistant design, the estimation of design forces continues to be carried out with the application of response modification factors on elastic design spectra. It is well-known that the response modification factor (R) takes into account the force reduction, strength, redundancy, and damping of structural systems. The key components of the response modification factor (R) are force reduction ($R_{\mu}$) and strength ($R_S$) factors. However, the response modification and strength factors for structural systems presented in design codes were based on professional judgment and experiences. A numerical study has been accomplished to evaluate force reduction, strength, and response modification factors for special steel moment resisting frames. A total of 72 prototype steel frames were designed based on the recommendations given in the AISC Seismic Provisions and UBC Codes. Number of stories, soil profiles, seismic zone factors, framing systems, and failure mechanisms were considered as the design parameters that influence the response. The effects of the design parameters on force reduction ($R_{\mu}$), strength ($R_S$), and response modification (R) factors were studied. Based on the analysis results, these factors for special steel moment resisting frames are evaluated.

• Journal of Korean Society for Atmospheric Environment
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• v.24 no.1
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• pp.108-121
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• 2008

On January 1, 2005, the Korean Ministry of Environment put into operation a comprehensive program, so called 'Blue Sky 21' project, for the improvement of air quality in greater Seoul metropolitan area. This program was legally based on the 'Special Act on Metropolitan Air Quality Improvement' for Greater Seoul area, which was established in 2003, and should be updated every 10 years. The principal objective of this program is to improve the air quality in Seoul and surrounding area by 2014 to the levels of air quality in Tokyo and Paris, with particular emphases on reducing the concentrations of nitrogen dioxide and $PM_{10}$. Any regulation of the emission of toxic air pollutants in general, and $NO_2$ and $PM_{10}$ in particular, should be based on human exposure levels and consequential health effects. In this article, the contents and feasibility of the special program were critically evaluated with respect to the reduction of health risks. Important issues for improving not only air quality but public health are discussed, and future requirements for the success of the special program are suggested.

• Journal of Korea Technology Innovation Society
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• v.16 no.4
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• pp.1055-1089
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• 2013

These days, the environment surrounding university has been changing rapidly and largely. Especially, the academic entrepreneurship for university spin-offs and wealth creation is being emphasized. And therefore, the importance of industry-academy-research institute cooperation for technology transfer and commercialization is increasing more and more. According to that, government have made various legal system and support the university activities for their autonomous and practical technology use, and one of that core means is to make university establish the special organization for technology transfer and commercialization, and support its activities systematically. This paper aims to study legal system on the special organization for university technology transfer and commercialization in korea. Especially, it is layed emphasis to search the problems and find out the improvement ways about the special organization. For this purpose, the legal system and necessity of special organization in university and other research institute are reviewed in domestic and abroad, the type and operation methodology of special organization in the existing laws are investigated in korea, the operation effects of several organization are analyzed, and lastly the improvement methods for activating the organization are studied and suggested.

• The Journal of Internal Korean Medicine
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• v.20 no.1
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• pp.167-180
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• 1999

Cervus elaphus, being known to reinforce Kidney, have tested to study the effects concerning damages of brain tissue induced by lipid peroxidation. In vitro, the level of lipid peroxide in brain tissue was decreased proportinally according to dose by Cervus elaphus extract solution for aqua-acupuncture (CESAA). It was much more decreased, when lipid peroxidation was induced with Fe(II). And, it was seen proportinally decrease according to the dose of CESAA on xanthine oxidase activities and type conversion ratio. However, I can not find special changes about aldehyde oxidase activities. And, I had observed the effects of CESAA on damages of rat's brain following ischemia and reflow. Before ischemia was caused, CESAA was applied 0.2 ml per 250 g through femoral vein in ischemia and reflow group and normal sailine was applied in normal group. Ischemia was caused by cervical artery's clamp for 30 min and reflowed by clamp remove after 15 min. It was increased on the content of lipid peroxidation, activies and type conversion ratio of xanthine oxidase following ischemia and reflow. However, they were decreased when CESAA was pre-appllied. However, it could not seen special changes on aldehyde oxidase activities, either. In conclusion. CESAA recovers the damage of brain due to ischemia and reflow by decreasing the lipid peroxidation through decreasing of xanthine oxidase activies and type conversion ratio.

• Korean Journal of Acupuncture
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• v.22 no.3
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• pp.53-61
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• 2005

Objectives : This study was designed to investigate the effect of thermal change on face, acupuncturing Yon-gok (KI2). The room temperature adjust $26^{\circ}C$ making use of air-conditioner. Methods : A Clinical study was done on 20 males and females who didn't have any disease. We used IR-5000 to observe the effects of acupuncture at face temperature. Results : Acupuncturing Yon-gok(KI2), the special region on face falls the temperature (n=20) from Avg.=$28.1400{\pm}0.2603^{\circ}C$ to Avg.=$27.4910{\pm}0.2539^{\circ}C$ the special region on chest falls the temperature (n=20) from Avg.=$26.9450{\pm}0.2591^{\circ}C$ to Avg.=$26.8690{\pm}0.2519^{\circ}C$ These effects result at the stimulating 'Hwa' point, one of five-shu-point one in the meridian, Yon-gok (KI2) is one of 'Hwa'. the stimulating 'Hwa' is able to cure fever, headache, and pains. and it has ablility of controlling body temperature, specially, upper region of whole human body. Conclusions : In conclusion. Acupuncturing Yon-gok (KI2) falls the temperature of region on face, Compared with the temperature of region on chest.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.63 no.1
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• pp.10-17
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• 2014

The Jeju Special Self-Government Provincial Government has made the plan penetrating gradually electric vehicles(EVs) in the Jeju Special Self-Government Province(Jejudo). However the effects of EVs penetration on the electrical grid of the Jejudo is not reported. In this paper the yearly electric energy consumed by the EVs was calculated and the effects of the EV penetration on the peak power of the grid were analyzed in the Jejudo for the future 10 years, and we hope that our study results will help the governors realize the EVs penetration plan in the Jejudo. The calculation results show that the rate of the electric energy used by the EVs will become to 2.9% at its maximum at the 2017 year when the penetration rate of EVs in passenger cars becomes 10%, and the rate of the electric energy consumed by the EVs will become to 9.4% at its maximum at the 2020 year when the penetration rate of EVs in passenger cars becomes 30%. The concepts of smart-charging capacity and 100%-valley-filling charging capacity of the grid were defined and calculated for the Jeju Grid, and the grid was analyzed to have the sufficient EV charging capacity until the 2022 year.

• Korean Journal of Veterinary Service
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• v.32 no.4
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• pp.353-359
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• 2009

Interest in marine organisms as potential sources of bioactive agents has increased in recent years. The red seaweed, Callophyllis (C.) japonica, is abundant in the coastal regions of Jeju Island in South Korea. A previous study shows that C. japonica extracts have antioxidant activity and radioprotective effects. In this study, an methanol extract of C. japonica was tested whether it has antibacterial effects against the bacteria from swine. In vitro antibacterial activities of the crude extracts prepared from the C. japonica using 80 % methanol were tested for inhibitory activity against the Escherichia (E.) coli (S175), Enterococcus (E.) faecium (ATCC 51558), Salmonella (S.) Typhimurium and Staphylo-coccus (S.) aureus (ATCC 25923) by using broth dilution method. All organisms were incubated in brain heart infusion medium containing 1% extract at 0, 4, 8, 12 and 24 hrs. The 3 days-old piglets were fed an experimental diet supplemented with 1% C. japonica for 1 week. And the change of the coliform bacteria in feces were examined after supplement of C. japonica for 1 week. When the inocula containing $10^2{\sim}10^3$CFU/ml of each organism were used the extracts of C. japonica showed various degrees of antibacterial effects on all bacteria tested. The CFU value ($6.3\times10^8$CFU/ml) of C. japonica for E. coli was decreased 30% compared with vehicle controls ($9.0\times10^8$CFU/ml) after 8 hrs incubation. The proliferation rate of E. faecium was inhibited about 68% at 4 hrs, 81% at 8 hrs and 76% at 12 hrs after incubation, respectively. The proliferation rate of S. Typhimurium was inhibited about 96% at 4 hrs, 90% at 8 hrs and 72% at 12 hrs after incubation with extracts of C. japonica. The proliferation rate of S. aureus was inhibited more than 90% each time courses. Conclusively, a red seaweed extract of C. japonica was found to be effective against a number of gram negative and gram positive bacteria such as E. coli, E. faecium, S. Typhimurium, and S. aureus. The number of coliform bacteria was increased in the 1% C. japonica-treated group, as compared to those of controls. This result suggests that C. japonica extracts be added as an effective natural antibacterial agent. The precise mechanism of antibacterial effects and its application on swine industry remains to be further studied.

• Journal of Ginseng Research
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• v.20 no.1
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• pp.83-87
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• 1996

The effects of gibberilin ($GA_3$) on levels of endogenous indole-3-acetic acid (IAA) and zeatin in both fresh and stratified American ginseng (Panax quinquefolium) seeds were investigated. In our first experiment, the fresh seeds were stratified after soaked in 80 ppd $GA_3$ solution for 24 hours. We found that the IAA concentration in embryo increased by 50.7% and 82.1% respectively at the 120th day and the 188th day of stratification, and the zeatin concentration also increased by 3.8% and 51.6% respectively. In our second experiment, we treated the seeds after 134 days stratification with 80 ppm GA3 for 24 hours and then continued to stratify them. We found that the IAA concentration in embryo increased by 32.9% and 17.7% respectively at the 164th day and the 208th day of stratification while zeatin concentration increased by 22.7% and 30.6% respectively In our another experiment, we studied the effects of $GA_3$, abscislc acid (ABA) and GA, plus ABA on germination rate of seeds treated with these plant hormones during stratification. We found that when the stratified seeds whose ratio of embryo had reached 75% were treated with 80 ppm GA3 for 24 hours and then were allowed to be stratified for another 88 days, the weight and length of embryo (p < 0.05), and germination rate (p < 0.01) increased. In contrast, the 25 ppm ABA treated with for 24 hours was found to Inhibit the growth of embryo (p < 0.05) and reduce the germination rate (p < 0.05) . The experiment of combination treatment of $GA_3$ and ABA showed that $GA_3$ could relieve the inhibitory effects of the ABA on the development of the seeds.

• The Journal of Korea Assosiation for Disability and Oral Health
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• v.10 no.1
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• pp.1-8
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• 2014

Patients with disabilities are a significant segment of Korea population. However, they encounter more challenges when seeking dental care. So, dentists and students who are future dental providers should have a responsibility to provide oral care services for them. In this study, we hypothesize that the education of special care dentistry may influence positive attitudes of the disabled. The attitudes are influenced by demographic variables such as gender, religion, experience of volunteer activities and marital status. Therefore, the objective of this study was to explore the change of attitudes of students towards people with disabilities between before and after class of special care dentistry. 72 students enrolled at the Kyung Hee University were surveyed. All participants attended class of Special Care dentistry in the third grade. The survey was conducted two times, just before class and after class. The attitudes of students were assessed using the well-documented ATDP (Attitude Toward Disabled Person)-O(Original) scale and MAS (Multidimensional Attitudes Scales Toward Persons with Disabilities) scale through the methodology of questionnaires. The results indicated that gender, experience of volunteer activities and marital status did not affect their ATDP and MAS score. In religious affiliation, only, there were statistically significant difference in student attitudes between before and after class of Special care dentistry. It means that habitual religious activity may offer stronger effects on student's attitude than short-term education. Therefore, long-term and specific educational experiences are needed to promote positive attitudes for people with disability.

• Analytical Science and Technology
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• v.5 no.1
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• pp.127-134
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• 1992

Effects of boron addition on microstructure and phases of plasma are melted tungsten have been investigated by optical microscopy, scanning electron microscopy, Auger electron spectroscopy, X-ray diffractometer, measurements of grain size and hardness. The change in the microstructure upon boron addition was studied by optical microscopy. It was observed that the grain refinement was induced upon content within the limit of solubility. When the boron content was above the solubility limit, two phases of primary tungsten and eutectic structure were observed and confirmed by AES and XRD analysis. It was also shown that recrystallization temperature was increased and recrystallized grain size was reduced as boron content increased.