• Research in Mathematical Education
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• v.11 no.4
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• pp.247-263
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• 2007

Problem solving takes place not only in mathematics classes but also in real-world. For this reason, a problem and the structure of problem solving, and the enhancing of success in problem solving is a subject which has been studied by any educators. In this direction, the aim of this study is that the strategy used by students in Turkey when solving oral problems and their achievements of choosing operations when solving oral problems has been researched. In the research, the students have been asked three types of questions made up groups of 5. In the first category, S-problems (standard problems not requiring to determine any strategy but can be easily solved with only the applications of arithmetical operations), in the second category, AS-SA problems (problems that can be solved with the key word of additive operation despite to its being a subtractive operation, and containing the key word of subtractive operation despite to its being an additive operation), and in the third category P-problems (problematic problem) take place. It is seen that students did not have so much difficulty in S-problems, mistakes were made in determining operations for problem solving because of memorizing certain essential concepts, and the succession rate of students is very low in P-problems. The reasons of these mistakes as a summary are given below: $\cdot$ Because of memorizing some certain key concepts about operations mistakes have been done in choosing operations. $\cdot$ Not giving place to problems which has no solution and with incomplete information in mathematics. $\cdot$ Thinking of students that every problem has a solution since they don't encounter every type of problems in mathematics classes and course books.

• Journal of Information Processing Systems
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• v.20 no.3
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• pp.337-344
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• 2024

It is a complex project to construct the standard system of sports events. Sports events standard system covers from the implementation plan to the evaluation work after the smooth implementation of sports events, involving many links. Large-scale sports events have extremely high media value. However, the successful organization and operation of large-scale sports events face many problems to be overcome, especially in terms of event safety. Although the organizers and organizers of large-scale events have invested many resources for the safe holding of sports events, violence similar to "football hooligans" in Europe is endless. At present, compared with Western countries, the standardization of sports events in China is low, and there is a problem of a late start and huge difference with Western developed countries. Knowing the construction of the standardization system's situation in China, we have summarized the data related to 15 sports events held in Chengdu is the last 5 years. By analyzing the problems in the process of holding these 15 events and the reflections of participants on the experience of sports events, the problems in the development of the standard system of sports events are discussed in depth. The final conclusion is that the system structure of China's sports events is not so good and athletes have a poor experience. China's sports event system still has many problems. Finally, we built a sports event standardization model using Internet of Things, and after a practical test we found that it has a good effect. Finally, we combined the current situation of sports event standardization system in China and put forward the following suggestions: laws and regulations related to the standard system of sports events must be formulated at the national level. The implementation level must strengthen the degree of integration of sports events and technology. To improve the quality of human resources in the management of sports events. The article puts forward targeted solutions, which play a great role in promoting the perfection and completeness of China's standard system for sports events. At the same time, it also promotes economic development and improves China's international status.

• Journal of the Korean Home Economics Association
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• v.20 no.1
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• pp.23-36
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• 1982

The purpose of this study was to investigate the problems of consumer and producer in women's ready-made clothing through questionaires, and to solve the problems presented by questionaires. The point at problems of ready-made clothing indicated by the consumer and producer altogether focused on the size. Therefore this study on the size of ready-made clothing was carried out. The size selected for the research materials were producer's size, domestic researchers' measurement size, KS size in the '81, and foreign standard sizes. The results of this study were as follows: 1) As comparing three kinds of size the producers' size(A), domestic researchers' measurement size(B), and KS size(C) it follows that: ① To the same circumference of bust, the waist measurement showed in following order: B＞C＞A, and the hip measurement showed generally in following order: A＞B. ② The extent of bust measurement showed in following order: B＞C＞A. ③ The sort numbers of size showed in following order: C＞B＞A. 2) As Comparing with foreign standard sizes, the sort numbers of our standard size were much less than foreigns as following order: DOB(102)＞JIS(78)＞BS(39)＞PS(29)＞KS(15)FNOR(10). 3) The reasonable size was made by referring to the producer's size, researchers' measurement size, and KS size.

• Proceedings of the Korean Professional Engineer Association Conference
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• 1994.12a
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• pp.138-140
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• 1994

Product liability law is published at 1st July '94 after long study and discussion. Product liability research commitee of Japan Consulting Engineer's Association that was started on september '91, is continuing the research of technical problems and consulting business for product liability. The Ministry of International Trade and Industry release the manual of product liability for an enter prise that is the standard to performe this problems in Japan. These gists of the manual and future business of Japan consulting engineer for these problems are mentioned.

• Journal of the Korean Institute of Educational Facilities
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• v.13 no.2
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• pp.25-33
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• 2006

Majority of elementary school in Korea are built by standard plan in 1980s. Being deteriorated and uniform, they have lots of problems to meet the new education curriculum and generate environmental problems in terms of its performances. This research intends to review the conditions of classroom units related with the environmental issues and provide the directions of sustainable renovation to meet the updated curriculum focusing on daylighting and ventilation systems for the classroom built by standard plan in 1980s.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.11a
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• pp.205-206
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• 2019

National Competency Standard(NCS) is a national organization that organizes the knowledge, skills, and quality required to perform duties at industrial sites by industry sector and level. As NCS was developed and adopted as part of the government's implementation of capability-oriented society, the construction industry is also fully applying NCS to the curriculum and training. This study investigated and analyzed the problems of NCS development in construction work field through prior research analysis and experts interview and derived problems such as discrepancies in classification system, lack of connectivity with curriculum, and lack of effectiveness in revising NCS in construction work field. Further research is thought to be necessary for the establishment of the development system reflecting the construction characteristics in the future and for the presentation of practical improvement directions.

• Journal of Korean Institute of Industrial Engineers
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• v.5 no.1
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• pp.27-44
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• 1979

The purpose of this study is to detect the problems of the Korean typewriter keyboards, and to analyze and compare the standard keyboard with other keyboards. We find that the standard Korean keyboard has a lot of problems in terms of mechanical engineering and human factors engineering and that it is less efficient than Kong's keyboard.

• Research in Mathematical Education
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• v.10 no.3 s.27
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• pp.215-227
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• 2006

After reviewing China's appearance and research on the Math open-ended problems, together with the application of those problems in mathematics test of Shanghai Senior Middle School Entrance Exams (SSMSEE) since 1999, this paper points out the difficulty in establishing an evaluation system for such problem. Through comparative study, the paper gives an operational definition of open-ended problem, and it attempts to establish an evaluation system and non-systematic competence targets that are appropriate to Math open-ended problems. Meanwhile, it describes the performance feature of those targets. By applying the standard international grading system of difficulty, it discusses the elements of difficulty in Math open-ended problems, and puts forward an evaluation as well as a level-of-difficulty forecasting system that is appropriate to the Middle School Entrance Exam.

• Journal of the Korean Home Economics Association
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• v.40 no.2
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• pp.57-66
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• 2002

This study investigated institutionalized children's behavior problems depending on their cognitive abilities. Subjects were 185 institutionalized children in 15 child-welfare facilities in Seoul (132 preschooler and 153 primary schoolers; 106 boys and 79 girls). Institutionalized children's cognitive abilities were measured using the Comprehension and Picture Completion Assessment, two subsets of K-WPPSI (Park et al., 1996) Comprehension and Picture Completion Assessment belong to verbal and performance scale, respectively. Measures of behavior problems included anxiety, immaturity, social withdrawal, physical symptom, hyperactivity, and aggression. Data were analyzed with mean, standard deviation, and t-test. Results showed that institutionalized children had higher scores in Picture Completion Assessment than Comprehension Assessment. Furthermore, institutionalized children with low scores in Comprehension Assessment were higher in anxiety and social withdrawal than children with high scores in Comprehension Assessment.

• Journal of the Korean Society for Precision Engineering
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• v.20 no.11
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• pp.117-126
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• 2003

GA(genetic algorithm) has a powerful searching ability and is comparatively easy to use and to apply as well. By that reason, GA is in the spotlight these days as an optimization skill for mechanical systems.$^1$However, GA has a low efficiency caused by a huge amount of repetitive computation and an inefficiency that GA meanders near the optimum. It also can be shown a phenomenon such as genetic drifting which converges to a wrong solution.$^{8}$ These defects are the reasons why GA is not widdy applied to real world problems. However, the low efficiency problem and the meandering problem of GA can be overcomed by introducing parallel computation$^{7}$ and gray code$^4$, respectively. Standard GA(SGA)$^{9}$ works fine on small to medium scale problems. However, SGA done not work well for large-scale problems. Large-scale problems with more than 500-bit of sere's have never been tested and published in papers. In the result of using the SGA, the powerful searching ability of SGA doesn't have no effect on optimizing the problem that has 96 design valuables and 1536 bits of gene's length. So it converges to a solution which is not considered as a global optimum. Therefore, this study proposes ExpGA(experience GA) which is a new genetic algorithm made by applying a new probability parameter called by the experience value. Furthermore, this study finds the solution throughout the whole field searching, with applying ExpGA which is a optimization technique for the structure having genetic drifting by the standard GA and not making a optimization close to the best fitted value. In addition to them, this study also makes a research about the possibility of GA as a optimization technique of large-scale design variable problems.