• Korean Journal of Soil Science and Fertilizer
• /
• v.37 no.1
• /
• pp.14-18
• /
• 2004

This study was aimed at searching for the wintering Cd hyperaccumulators as the life cycle of existing hyperaccumulators were mostly from spring to early winter season. The wintering hyperaccumulators can be effective for saving time loss during the winter. A pot experiment was conducted to search for hyperaccumulators through out the native wintering plants. Seven species of native wintering plants were applied; Bromus catharticus, Oxatis corniculata, Festuca rubra, Thlaspi. arvense, Agastache rrgosa, Viola seoulensis, and Patrinia rapestris. Among them, Bromus catharticus and Thlaspi arvense were selected as Cd hyperaccumulators; the two plants accumulated 112.35 and $86.69mg\;kg^{-1}$ of Cd in the shoot, respectively.

• Journal of the Korean Society for Library and Information Science
• /
• v.34 no.1
• /
• pp.111-132
• /
• 2000

As the Web continues to expand and the amount of database increases, it is argued that the information scanning in web-centric search and retrieval become an important and professional activity. This analysis was performed to diagnose the ability of information scanning of searchers and to investigate the obstacles hindering the searchers from information scanning. Findings indicate that, even if the undergraduate students of information & library science had been exposed themselves to the LIS curriculum for four or three college years, their ability of information scanning was not sufficient enough to carry out successful DB searching or retrieval services as subject specialists. Some suggestions for improving information scanning ability of information professionals were derived from the experiment results.

• The Journal of the Korea Contents Association
• /
• v.15 no.11
• /
• pp.374-385
• /
• 2015

This purpose of study is to develop a dyslexia check list for students in middle and high school. To ensure the contents validity, researching related studies was conducted, and then factors and items were made under the 5 experts advisory. The pilot test was done on 265 students who are in middle and high school. To obtain the reliability, SPSS 21,0 was conducted as exploratory factor analysis and to confirm the goodness of fit test, AMOS 7.0 was done as confirmatory factor analysis. The results of study are as below, firstly, 8 measure factors and 34 items were ensured. Secondly, in exploratory analysis, Crombach ${\alpha}=.920$ was obtained, it was high value. Thirdly. in confirmatory factor analysis, the absolute fit index : GFI=.920, RMR=.057, RMSEA=.062 and incremental fit index : CGI=.960, TLI=.977 were ensured. Above results, the developed measurement tool for students in middle and high school in this study was confirmed as a suitable one.

• The Journal of the Korea Contents Association
• /
• v.21 no.11
• /
• pp.30-40
• /
• 2021

Ratings and reviews, despite their growing influence on restaurants' sales and reputation, entail a few limitations due to the burgeoning of reviews and inaccuracies in rating systems. This study explores the texts in reviews and ratings of a delivery application and discovers ways to elevate review credibility and usefulness. Through a text mining method, we concluded that the delivery application 'Yogiyo' has (1) a five-star oriented rating dispersion, (2) a strong positive correlation between rating factors (taste, quantity, and delivery) and (3) distinct part of speech and morpheme proportions depending on review polarity. We created a chicken-specialized negative word dictionary under four main topics and 20 sub-topic classifications after extracting a total of 367 negative words. We provide insights on how the research on delivery app reviews should progress, centered on fried chicken reviews.

• Journal of the Korean Society for information Management
• /
• v.40 no.4
• /
• pp.95-121
• /
• 2023

This study aims to explore the combinations of services and technologies for academic libraries to use based on librarians' perception and establish effective service strategies accordingly. The literature review facilitated an understanding of Fourth Industrial Revolution technologies impacting the libraries. We discovered how technologies are transforming library services. We analyzed the academic library services to categorize their service structure. The survey revealed the necessity of introducing technology for each service category and the appropriate automation levels of services based on the perception of librarians. The survey results identified nine prioritized combinations of academic library services and technologies. Based on the analysis, we proposed the service-technology strategies for each category. This study has significance in exploring the potential for introducing and utilizing new technologies to enhance academic library services and exploring ways to combine services and technologies based on the common opinion of librarians.

• Journal of Gifted/Talented Education
• /
• v.22 no.1
• /
• pp.61-85
• /
• 2012

The OSPG(Observation Scale for Parents of the Gifted in Korean Traditional and Western Music) is one of the tools for screening of the Gifted in Korean traditional and Western music. So the validity and reliability of the OSPG has an influence on securing validity of the whole identification process. The purpose of this study is to examine the validity and reliability of the OSPG-2 that input screening processing, and to suggest systematization of identification processing for the Gifted in Korean traditional and Western Music. For the achievement of this purpose, this study administered the OSPG-2 to 261 gifted students aged between 13 and 16 in the middle or high school for the arts. To validate the OSPG-2, I analyzed items of the OSPG-2, and conducted the exploratory and confirmative factor analysis. I also examined the internal consistency. As a result of the exploratory factor analysis, I collected 40 items of the OSPG-2 finally. Furthermore, I could identify psychological construct of the Gifted in Korean traditional and Western Music. The consequence of confirmative factor analysis, the model provided good fit to observed data. As a result of reliability analysis, the internal consistency of the internal characteristic verified Cronbach's ${\alpha}$=.939, and the internal consistency of the external environmental characteristic verified Cronbach's ${\alpha}$=.887. This result of validity study reflects the fact that the OSPG-2 is a valid scale and is able to input to gifted educational field instantly.

• Journal of Gifted/Talented Education
• /
• v.23 no.1
• /
• pp.1-24
• /
• 2013

The OSTG (Observation Scale for Teachers of the Gifted in Korean Traditional and Western Music) is one of the tools for screening of the Gifted in Korean traditional and Western music. So the validity and reliability of the OSTG-2 has an influence on securing validity of the whole identification process. The purpose of this study is to examine the validity and reliability of the OSTG-2 that input screening processing, and to suggest systematization of identification processing for the Gifted in Korean traditional and Western Music. For the achievement of this purpose, this study administered the OSTG-2 to 195 teachers of gifted students aged between 13 and 16 in the middle or high school for the arts. To validate the OSTG-2, I analyzed items of the OSTG-2, and conducted the exploratory and confirmative factor analysis. I also examined the internal consistency. As a result of the exploratory factor analysis, I collected 22 items of the OSTG-2 finally. Furthermore, I could identify psychological construct of the Gifted in Korean traditional and Western Music. The consequence of confirmative factor analysis, the model provided good fit to observed data. As a result of reliability analysis, the internal consistency of musicality verified cronbach' ${\alpha}$=.852, and the creativity verified cronbach' ${\alpha}$=.894, the task commitment verified cronbach' ${\alpha}$=.924. This result of validity study reflects the fact that the OSTG-2 is a valid scale and is able to input to gifted educational field instantly.

• Journal of Life Science
• /
• v.16 no.1
• /
• pp.108-113
• /
• 2006

To compensate the problems of chemical assay in detoxification of recalcitrant and a practical approach in selection of bioremediation bacteria, a simple and rapid toxicity evaluation system was constructed based on Lumbricus rubellus. Long term-culture and specific equipment are not necessary, and semi-quantitative analysis of toxicity at sub-lethal concentration is possible by measuring of dose-dependent increased yellowish secreted compounds. When the toxicity of endosulfan, its metabolites and structurally related chemicals were measured for 24 h, the results were coincided with previous reports. Toxicity was found in endosulfan, endosulfan sulfate, aldrin, and dieldrin, respectively. Rapid and economic selection of endosulfan-detoxifying bacteria was possible using our system. Klebsiella pneumoniae KE-1, K. oxytoca KE-8 and Pseudomonas sp. KS-2P, reported endosulfan degrading bacteria, ameliorated the endosulfan toxicity, whereas E. coli, B. subtilis and other bacteria failed to protect the toxicity of endosulfan in L. rubellus. Our results suggest that the constructed system is useful to selection of microorganism as well as toxicity evaluation against toxic recalcitrants.

• The Korean Journal of Mycology
• /
• v.47 no.3
• /
• pp.259-269
• /
• 2019

Brown spot and sheath rot of rice are caused by fungal pathogens such as Curvularia lunata, Cochliobolus miyabeanus, and Sarocladium oryzae, and cause losses such as reduced rice yield and quality, which is an enormous problem with serious long-term effects. To search biological control agents of phytopathogenic fungi, five kinds of useful Bacillus-like isolates which are excellent in extracellular enzyme activity and produce siderophore were selected from paddy soil of Sunchang in Korea. The selected isolates were tested for excellent antifungal activity against three of the phytopathogenic fungi that frequently occur in rice, and JSRB 177 strain had the most excellent antifungal activity. Based on the experimental results, JSRB 177 is finally selected as a candidate for biological control and identified to Bacillus subtilis through 16S rRNA sequence analysis. In addition, physiological characteristics of JSRB 177 confirmed by analysis of carbohydrate fermentation patterns and enzyme production ability. Based on the above results, JSRB 177 is expected to be used as a biological control agent for the rice pathogenic fungi. In the future, further studies related to industrialization such as port test and establishment of mass production process are needed.

• Proceedings of the IEEK Conference
• /
• 2000.11d
• /
• pp.179-182
• /
• 2000

논문은 웨이블릿(wavelet) 변환된 각 프레임의 모든 부대역의 블록들에 대해 계층적 움직임을 추정할때 고해상도 계층에서는 기저대역에서 추정된 전역 움직임 벡터를 기초로 하여 국부 움직임을 추정한다. 이때 복원 영상에 미치는 영향이 가장 큰 기저대역에 대하여 반화소를 사용하면 더욱 최적의 움직임 벡터를 추정할 수 있으나 계산량이 증가하는 단점이 있다. 블록내에 인접한 화소들 간에는 상관관계가 높다는 사실을 이용하여 오차가 최소가 되는 방향을 예측하여 선별적인 보간을 행하여 반화소 움직임을 탐색하여 계산량을 줄였다. 그리고 더욱 향상된 화질을 얻기 위해서 에지 성분이 많은 고해상도 계층에서 저해상도 계층으로의 선택적 국부 움직임을 추정하였다. 모의 실험 결과 기존의 웨이블릿 변환을 이용한 움직임 추정 및 보상 방법보다 향상된 화질을 나타내었다.