• The Bulletin of The Korean Astronomical Society
• /
• v.38 no.2
• /
• pp.87.1-87.1
• /
• 2013

Ellerman bombs(EB) are small-scale bright features observed best in the wings of H alpha line. We used the Fast Imaging Solar Spectrograph(FISS) with the 1.6m New Solar Telescope at Big Bear Solar Observatory, in order to investigate characteristics of each EB. We analyzed H alpha line profiles of EBs, and classified EBs by their contrast profiles. To analyse characteristics of EBs, we applied power-law fitting ($C={\alpha}{\Delta}{\lambda}^{-n}$) to the EB contrast profiles. The amplitude ${\alpha}$ is a measure of the strength of an EB event (or the amount of released energy), and the power-law index n is a measure of spatial concentration of energy in the higher layers of the solar atmosphere. With the two parameters, we classified EBs into a few groups. We try to understand the physical properties of each group.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2013.06a
• /
• pp.368-371
• /
• 2013

스마트 미디어 환경으로 변화하면서 전에는 볼 수 없었던 다양한 방송 서비스들이 소개되고 있다. 증강현실은 그중 하나로, 스마트 미디어를 위한 주요 서비스로 자리를 잡았으며, 디지털 방송 서비스로도 그 응용 기술이 확산되어 증강방송기술의 연구가 수행되고 있다. 증강방송은 TV 화면에 증강 콘텐츠를 방송 콘텐츠와 겹쳐 보여주는 서비스로, 스마트 기기로 제어하고 연동할 수 있다는 특징을 가지고 있다. 본 논문은 대표적인 유아 프로그램인 '방귀대장 뿡뿡이'로 증강방송 콘텐츠를 제작하여 시연함으로써 다양한 증강방송 활용 모델을 제시했다.

• Nuclear Engineering and Technology
• /
• v.55 no.4
• /
• pp.1495-1506
• /
• 2023

For the safe disposal of high-level radioactive waste using Engineered Barrier Systems (EBS), bentonite buffer is used by its high swelling capability and low hydraulic conductivity. When the bentonite buffer is contacted to heated pore water containing ions by radioactive decay, chemical alterations of minerals such as illitization reaction occur. Illitization of bentonite indicates the alteration of expandable smectite into non-expandable illite, which threatens the stability and integrity of EBS. This study intends to provide a thorough review on the information underlying in the illitization of bentonite, by covering basic clay mineralogy, smectite expansion, mechanisms and observation of illitization, and illitization in EBS. Since understanding of smectite illitization is crucial for securing the safety and integrity of nuclear waste disposal systems using bentonite buffer, this thorough review study is expected to provide essential and concise information for the preventive EBS design.

• Journal of Korean Elementary Science Education
• /
• v.34 no.1
• /
• pp.32-45
• /
• 2015

The purpose of this study is to further develop the strategies using EBS clipbank service and investigate the their effects of the science academic emotion on the student's attitude toward science. Clipbank is service for educational purpose. EBS provides clipbank that holds about 210,000 video clips made from EBS programs. Two class of 6th grade were selected and instructed. Implementing and using the teaching strategies, a test was administered to examine the science academic emotion of the students effects using clipbank teaching. It had two rounds for inspection about operation of the strategies with curriculum. In the second research, by re-supplying a more sophisticated program strategy from first in putting feedback. The result of analyzing the test was as follows. First, elementary teachers can be used in class to take advantage of a variety of educational materials clipbank contents. Result of teachers survey, clipbank teaching was effective and teachers who using clipbank service will be the continue utilize clipbank. Second, the strategy for using clipbank teaching was effective on student's science academic emotion. And strategy was effective significantly different depending on gender. In conclusion, the strategy for using clipbank teaching, made students feel that learning science was interesting. A lot of reseaches give that science can provide the ideas as a metheod to educational web-sites, educational web-sites can provide creative ideas to science learning strategy, but it is still lacking that research can be applied to education specifically on how to. This study will help elementary teachers adjust teaching to help students learn science with positive emotions.

• Tuberculosis and Respiratory Diseases
• /
• v.60 no.4
• /
• pp.412-418
• /
• 2006

Background; The diagnosis of chlamydial infection is based on serology. The current gold standard of diagnosis is MIF(microimmunofluorescence), but this modality is subjective and time-consuming. Protein microarray with using a SPR(surface plasmon resonance) sensor has recently been suggested as a method for detecting infection. For developing a protein chip to diagnose chlamydial infection, EBs(elementary bodies) were immobilized on a gold chip and the interaction between an antibody for Chlamydophila pneumoniae and the EBs(elementary bodies) immobilized on the surface of the gold chip was measured by using an SPR sensor. Methods; For the surface antigen, the EBs of Chlamydophila pneumoniae LKK1 were purified. Charged arrays were prepared by using PDDA(polydiallyldimethylammonium chloride) which has a positive charge. After immobilization of the chlamydial EBs on the PDDA surface, the investigation of the surface was done with using atomic force microscopy. After the antibody for C. pneumoniae was applied on chip, we monitored the SPR wavelength-shift to detect any antigen-antibody interaction with using a self-assembled SPR sensor. Results; The chlamydial EBs on the positively charged PDDA were visible on the surface with using atomic force microscopy. The SPR wavelength increased after interaction of antibody for C. pneumoniae with the EBs immobilized on charged gold surface. The wavelength-shift was correlated with the concentration of antigens. Conclusion; The surface immobilization of EBs on the gold surface with the charged arrays was identified and the antigen-antibody interaction on the gold chip was detected via the SPR sensor. Further investigations are needed to apply this technique to the clinical field.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2015.11a
• /
• pp.81-82
• /
• 2015

BIM has been a reliable construction project management tool to handle various kinds of construction information generated in the facility life cycle. To take these advantages, researchers have been promoted numerous studies in a residential, a commercial, and an educational facilities with a large number of on-going projects. However, despite running as the role of essential energy supplier, power plant related BIM research is relatively insufficient than others. In particular, due to the extending of the facility service period and the requirement of the complicated construction project management for 'overhaul' and 'repowering' in the power plant maintenance phase, the needs for using BIM have been increased gradually. For using BIM based maintenance, it is needed to consider an information collecting methods and necessary to develop an appropriate breakdown structure to share information. Therefore, 'EBS' is produced by reviewing the previous research related to BIM and analyzing the repair activities in the maintenance phase. Proposed 'EBS' must be useful not only a judgment between capital expenditure versus revenue expenditure but also appropriate maintenance strategies development for property management.

• Proceedings of the International Microelectronics And Packaging Society Conference
• /
• 2003.11a
• /
• pp.141-144
• /
• 2003

Si 태양전지의 기전력 형성에 이용되는 빛의 파장범위$(0.4{\mu}m\leq\lambda\leq0.97{\mu}m)$에서 AM1 스펙트럼과 Si 굴절율을 수학적으로 모델링하고 광반사 방지막$(SiO_2)$의 두께에 따른 Si 태양전지의 유효 광 흡수전력을 전산 모사하였다. 전산 모사로부터 얻어진 Si 태양전지의 유효 광흡수전력은 $SiO_2$막의 두께가 $500\AA$과 $1000\AA$일 때 각각 $520\;W/m^2$와 $450\;W/m^2$로 나타났으며, $d(SiO_2)=1000\AA$에서 최대광흡수 특성을 보였다. 광반사 방지막의 처리에 따른 유효 광흡수전력의 차이를 알아보기 위해 $SiO_2$막의 두께를 $500\AA$과 $1000\AA$으로 형성한 2종류의 에피텍셜 베이스 Si 태양전지$[EBS(500\AA),\;EBS(1000\AA)]$를 제작하고 효율특성을 분석한 결과, AM1 $100\;mW/cm^2$ 입사광 아래 $EBS(1000\AA)$ 전지는 $EBS(500\AA)$전지에 비해 효율이 약 $15\%$ 높게 나타났다.

• Journal of Korean Academy of Nursing
• /
• v.42 no.4
• /
• pp.466-476
• /
• 2012

Purpose: The purpose of this study was to explore characteristics of eating behavior according to level of functional status of elders with dementia (EWD), and to examine feeding time, change in food intake and body mass index (BMI) according to eating behavior. Methods: Participants were 149 EWD residing in long-term care facilities located in Seoul or Gyeonggi province and evaluated using the Mini-Mental State Exam-Korean version, Korean version-Activities of Daily Living, and Eating Behavior Scale (EBS). Feeding time, change in food intake, and BMI were also measured. Data were analyzed using SPSS 17.0, specifically descriptive statistics, ANOVA, and Chi-square test. Results: Participants' mean EBS score was $10.43{\pm}6.01$ and half of them (54.4%) needed moderate or total assistance while eating. The EBS score was significantly lower for elders with severe dementia compared to those with mild or moderate dementia; and elders with severe ADL dependence compared to those with mild or moderate ADL dependence. Lower EBS scores were related to longer feeding time, a greater the rate of participants with decreased food intake and 'underweight' BMI. Conclusion: Nursing intervention programs which are designed for EWD are needed to maintain functional eating skills and prevent negative consequences in this population.

• Korean Journal of Materials Research
• /
• v.14 no.2
• /
• pp.152-156
• /
• 2004

We have studied the effective optical absorption power of Si solar cell with $SiO_2$-antireflection layer based on a mathematical modelling of AM(air mass)1 spectrum and Si refractive index in the wavelength range(0.4 $\mu\textrm{m}\leq$λ$\leq$$0.97\mu\textrm{m}$). The effective optical absorption power obtained from the theoretical calculation was 450 and 520 W/$\m^2$ for the Si solar cells with $SiO_2$-antireflection layer of 500$\AA$ and 1000$\AA$, respectively. The optimum thickness of $SiO_2$-antireflection layer showing the minimum reflection loss was about 1000$\AA$ in the computer simulation. Two kinds of Si solar cells named EBS(500$\AA$) and EBS(l000$\AA$) were fabricated to evaluate the effect of $SiO_2$-antireflection layer thickness on the optical absorption. The epitaxial base Si cell with $SiO_2$-antireflection layer of 1000$\AA$ [EBS(l000$\AA$)] showed the output power improvement of about 15% upon the EBS(500$\AA$) cell due to larger absorption of effective optical power under illumination of AM1, 1 sun.

• Korean Journal of Pharmacognosy
• /
• v.41 no.3
• /
• pp.196-203
• /
• 2010

Black sesame (Sesami semen nigrum) has been used to treat dizziness, earnoise, constipation in the traditional Chinese medicine. In the present study, we assessed memory enhancing properties of 70% ethanolic extract of black sesame (EBS70) and its ameliorating activities on learning and memory impairments induced by scopolamine. Drug-induced amnesia was made by scopolamine treatment (1 mg/kg, i.p.). Single EBS70 (200 mg/kg, p.o.) administration significantly enhanced cognitive function and attenuated scopolamine-induced cognitive impairments as determined by the passive avoidance and Y-maze tasks (P<0.05) and also reduced escape-latency on the Morris water maze task (P<0.05). In addition, EBS70 increased BDNF expression in hippocampus 4 h after its administration (P<0.05). These results suggest that EBS70 enhances learning and memory in normal state and attenuates amnesic state caused by cholinergic dysfunction.