• Hwankyungkyoyuk
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• v.10 no.2
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• pp.145-156
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• 1997

The purpose of this study is to investigate the perceptions of those teachers who attentd the second annual environmental education program for certification of a second-major regarding environmental education, and to provide reference materials for development of the next phase in environmental education programs and environmental textbooks. A survey methodology was used in the study. A survey, consisting of 16 questions, was developed by the researchers. The subjects consisted of 97 teachers. The teachers revealed their opinions in five categories of the survey, including environmental subjects, increased education and knowledges on environmental issues, a middle school environmental textbook, teaching methods on environment, and the structure of the program. Results from this study suggest a few directions for improvement of the next annual environmental certification program and the secondary school environmental textbooks.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2003.10a
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• pp.603-606
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• 2003

This study was carried out to investigate the effects of T-P concentrations in irrigation water on the growth, yield, and grain quality of rice. It acquire fundamental knowledges to set up irrigation water quality standards. The pot experiment was conducted with 5 treatments using irrigation waters. It consisted of various total phosphorus concentrations(control, 1, 2, 5, 10mg/L) and replicated four times with randomized block design. The results of this study showed that as T-P concentrations in irrigation water increases, plant height tended to increase. Dry weight of rice plant at T-P 10mg/L was significantly higher than the control. However, T-P in irrigation water did not affect plant height, tiller number, plant dry weight, yield, and quality of rice.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2003.10a
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• pp.551-554
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• 2003

This study was carried out to investigate the effects of the pH of irrigation water on the growth, yield, and grain quality of rice. It acquire fundamental knowledges to set up irrigation water quality standards. The pot experiment was conducted with 5 treatments using irrigation waters with various pH values(control, 4, 6, 8, 10) and replicated four times with randomized block design. The results of this study showed that the uptake of N, P, and K, Ripened grain ratio and yield of rice tended to be reduced at the irrigation water of pH 4 and pH 10. P uptake, Ripened grain ratio and yield of rice at pH 4 water were significantly lower than the control. K uptake at pH 10 water was significantly lower than the control. Plant height, SPAD value and protein content of rice were not affected by the pH of irrigation water.

• 제어로봇시스템학회:학술대회논문집
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• 1993.10a
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• pp.737-741
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• 1993

In this paper, we design the fuzzy logic controller(FLC) for a nonlinear multivariable steam generating unit. Based on the knowledges of operator, the self-organizing controller(SOC) - a kind of FLC - is developed and tested. Both FLC and SOC based on linguistic rules have the advantages of not needing of some exact mathematical model for plant to be controlled. Beside, the SOC modifies the existing control rules by monitoring the control performance. The computer simulations have been carried out for the 200MW steam generating unit to show the usefulness of the proposed method and the effects of disturbances and parameter variations are considered.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.1029-1032
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• 2001

The purpose of this paper is to establish an automated die design system for compacting and sizing process required in Powder Metallurgy. Though the Powder Metallurgy(P/M) is a practical and economical forming technology, it needs long time and many trials and errors for die design. Such a problem can be solved by introduction of the automated die design system for P/M. In order to establish the system, collecting, classifying, and systematizing related knowledges from the experts in industries, books, and papers were performed. The system was constructed by AutoLISP, the language operated in AutoCAD atmosphere. This language can efficiently support for user to work on drawings. There are three modules ; P/M part specification input module, P/M part design module, and Die design module. A part for vehicle was applied to the system and satisfied results were achieved.

• Journal of the Korean Society for Precision Engineering
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• v.15 no.2
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• pp.162-169
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• 1998

Lacking for the skilled grinding operator possessed of the experiential knowledges in machine shop, there is the just requirement which includes the establishment of the optimal grinding conditions. Accordingly, we attemt to develope the selection system of optimal grinding conditions such as workpiece velocity, depth of cut and wheel velocity and to add the trouble shooting system by means of the neural network. Those systems are robust to the each machine error and environmental unstable state. In addition. we produce the loaming process that is progressed with additional data modified by skilled operators, and excluding is advanced to similarity of input data.

• Journal of Korean Home Economics Education Association
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• v.15 no.1
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• pp.33-42
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• 2003

The Purpose of this study was to develop a lesson proposal about the aging for 7th glade middle school students in the class of home economics. According to this Purpose a lesson Proposal about the aging which contains 1) the nature of generation gap and generational conflicts and problem solving strategies. 2) knowledges about physical. emotional. and social changes of older adults and the process of aging. 3) informations of various order adult-related Professions was devised This proposal will be helpful for younger people to understand older adult much more and to Prepare the adolescents' future life as an older people. It is expected to have effects on decrease the generation gap and conflicts between older and younger people based upon mutual understanding. And it is anticipated that this Proposal will be valuable for many adolescents to have provision about future senior citizen's society and various older adults-related professions .

• International Journal of Human Ecology
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• v.5 no.2
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• pp.31-49
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• 2004

The purposes of the study were to examine the trend of undergraduate students' knowledges and attitudes toward elderly and aging traits, and to present the influence of undergraduate students' attitudes. The subjects were 494 undergraduate students. Statistics used such as frequency, Percentage, Mean, Standard Deviation, Cronbach's ${\alpha}$, t-test, Duncan test, ANOVA and Stepwise Multiple Regression Analysis. The results of this study were as follow: 1) Undergraduate students' knowledge level toward the elderly was low, and undergraduate students' attitudes level was middle. 2) There were meaningful differences in attitudes level according to sex, living together with elderly (the present time), living together with elderly (the past time), the presence of grandfather. It also had a significant correlation to the undergraduate students' knowledge. 3) The variables which affected the undergraduate students' attitudes were knowledge, sex, present co-residency with grandparents, past co-residency with grandparents, the presence grandfather, period of co-residency with grandparents that were explained about $24\%$. Among variables, knowledge of elderly was a very important variable on undergraduate students' attitudes.

• Journal of Information Technology Applications and Management
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• v.15 no.1
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• pp.271-282
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• 2008

Database administrators are demanded to acquire much knowledges and take great efforts for keeping consistent performance in system. Various principles, methods, and tools have been proposed in many studies and commercial products in order to alleviate such burdens on database administrators, and it has resulted to the automation of DBMS which reduces the intervention of database administrator. This paper suggests a resource selection method that estimates the status of the database system based on the workload characteristics and that recommends tuneable resources. Our method tries to simplify selection information on DBMS status using data-mining techniques, enhance the accuracy of the selection model, and recommend tuneable resource. For evaluating the performance of our method, instances are collected in TPC-C and TPC-W workloads, and accuracy are calculated using 10 cross validation method, comparisons are made between our scheme and the method which uses only the classification procedure without any simplification of informations. It is shown that our method has over 90% accuracy and can perform tuneable resource selection.

• The korean journal of orthodontics
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• v.24 no.4 s.47
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• pp.819-826
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• 1994

This study was designed to get the knowledges of the ideal arch form of the class I malocclusion patients of Koreans with first premolar extraction. The subjects consisted of 98 individuals with class I malocclusion with first premolar extraction. The results were as follows ; 1 Author found the ideal arch shape of the class I malocclusion patients with first premolar extraction. 2. Equations of ideal arch form of the class I malocclusion patients with first premolar extraction were obtained from SPSS.