• Journal of The Korean Association For Science Education
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• v.33 no.2
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• pp.522-537
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• 2013

This study analyzed the relationship among the construct level of analogical reasoning, prediction and uncertainty, and the construction of an explanatory model that were produced during small group discussions for scientific problem solving. This study was participated in by 8 students of K University divided into 2 teams conducting scientific problem solving. The participants took part in discussions in groups after achieving scientific problem solving individually. Through individual interviews afterwards, changes in their thinking through discussion activities were looked into. The results are as follows: The analogy at the Entities/Attributes level was used to make people clearly understand the characteristics of certain objects or entities in the discussions. The analogy at the Configuration/Motion level that was produced during the discussions ensured other participants to predict the results of problem solving. The analogy at the Mechanism/Causation level changed the structure of problem situations either to help other participants to reconstruct the explanatory model or to come up with a new situation that was never been through before to justify the created mechanism and through this, the case of creating Thought Experiments during the discussions were observed. if looking into the changes of analogies, each individual's analogic paradigm during the discussions were shown as production paradigm, reception-production paradigm, production-reception paradigm, and reception paradigm. The construction and reconstruction of the explanatory model were shown in analogic production paradigm, and in the reception paradigm of an analogy, participants changed their predictions or their certainty.

• Journal of applied mathematics & informatics
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• v.3 no.2
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• pp.169-182
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• 1996

This paper presents the numerical experiment of a dis-cretized loaded cable with periodic forcing. There appeared to be var-ious type of nonlinear oscillations over a wide range of fequencies and amplitudes for the periodic forcing term. The same forcing term can give rise to large or small oscillation by solving initial value problem and observing the solutions after a long time.

• Journal of The Korean Association For Science Education
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• v.26 no.4
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• pp.537-545
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• 2006

The purpose of this study was to analyze the effects of the SWH application to problem-solving type inquiry modules. The modules were applied to 23 3rd grade students in middle school located in Chungbuk and the SWH strategy was applied to 3 experimental groups. The blue and green cards were presented at the problem emerging situation to the students to give enough thinking time. Using blue cards students propose solution to the problem in advance individually, then they discuss with group members using green cards and conduct experiments to solve the problem. SWH students exhibited better problem recognition and attitude.

• Education of Primary School Mathematics
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• v.18 no.2
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• pp.123-139
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• 2015

The purpose of this study was to investigate the effects of the experiences of productive failures on students' mathematical problem solving abilities and mathematical dispositions. The experiment was conducted with two groups. The treatment group was applied with the productive mathematics failure program, and the comparative group was taught with traditional mathematics lessons. In this study, for quantitative analysis, the students were tested their understanding of mathematical concepts, mathematical reasoning abilities, students' various strategies and mathematical dispositions before and after using the program. For qualitative analysis, the researchers analyzed the discussion processes of the students, students's activity worksheets, and conducted interviews with selected students. The results showed the followings. First, use of productive failures showed students' enhancement in problem solving abilities. Second, the students who experienced productive failures positively affected the changes in students' mathematical dispositions. Along with the more detailed research on productive mathematical failures, the research results should be included in the development of mathematics textbooks and teaching and learning mathematics.

• School Mathematics
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• v.16 no.4
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• pp.659-675
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• 2014

The purpose of this study is to investigate the effects of scheme based strategy Instruction on problem solving of word problems of ratio and proportion for students with under achievement or at risk for learning disabilities. Three $7^{th}$ graders of underachieving or at risk LD were participated in this study. Three steps of instructional experiment-testing baseline, intervention with schematic-based strategy, testing for the abilities of problem solving, generalization, & sustainability. The results showed that the schema-based strategy, FOPS was effective method for all three students enhancing problem solving abilities and for generalizing and sustaining the problem solving.

• Journal of the Korea Society of Computer and Information
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• v.27 no.8
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• pp.1-7
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• 2022

With the development of artificial intelligence, efforts to incorporate neuroscience mining with AI have increased. Neuroscience mining, also known as NSM, expands on this concept by combining computational neuroscience and business analytics. Using fNIRS (functional near-infrared spectroscopy)-based experiment dataset, we have investigated the potential of NSM in the context of the BPSC (business problem-solving creativity) prediction. Although BPSC is regarded as an essential business differentiator and a difficult cognitive resource to imitate, measuring it is a challenging task. In the context of NSM, appropriate methods for assessing and predicting BPSC are still in their infancy. In this sense, we propose a novel NSM method that systematically combines CNN, BiLSTM, and attention network for the sake of enhancing the BPSC prediction performance significantly. We utilized a dataset containing over 150 thousand fNIRS-measured data points to evaluate the validity of our proposed NSM method. Empirical evidence demonstrates that the proposed NSM method reveals the most robust performance when compared to benchmarking methods.

• Journal of Computing Science and Engineering
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• v.8 no.4
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• pp.199-206
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• 2014

The ant colony optimization (ACO) algorithm is a new heuristic algorithm that offers good robustness and searching ability. With in-depth exploration, the ACO algorithm exhibits slow convergence speed, and yields local optimization solutions. Based on analysis of the ACO algorithm and the genetic algorithm, we propose a novel hybrid genetic ant colony optimization (NHGAO) algorithm that integrates multi-population strategy, collaborative strategy, genetic strategy, and ant colony strategy, to avoid the premature phenomenon, dynamically balance the global search ability and local search ability, and accelerate the convergence speed. We select the traveling salesman problem to demonstrate the validity and feasibility of the NHGAO algorithm for solving complex optimization problems. The simulation experiment results show that the proposed NHGAO algorithm can obtain the global optimal solution, achieve self-adaptive control parameters, and avoid the phenomena of stagnation and prematurity.

• Journal of Korea Multimedia Society
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• v.18 no.11
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• pp.1375-1382
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• 2015

This paper aims to introduce the numerical methods for solving the optimal control theory to model bufferbloat problem. Mathematical tools are useful to provide insight for system engineers and users to understand better about what we are facing right now while experiment in a large-scale testbed can encourage us to implement in realistic scenario. In this paper, we introduce a survey of the numerical methods for solving the optimal control problem. We propose the dynamic optimization sweeping algorithm for optimal control of the active queue management. Simulation results in network simulator ns2 demonstrate that our proposed algorithm can obtain the stability faster than the others while still maintain a short queue length (≈10 packets) and low delay experience for arriving packets (0.4 seconds).

• Journal of Science Education
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• v.38 no.1
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• pp.120-132
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• 2014

This research aimed at developing STEAM Program with the medium of films for scientific talents in elementary schools and examining its influence on the problem solving ability, creative personality, and scientific attitude. The results were as follows: First, the STEAM program using movies was proved to be effective in forming creative personality, and a significant difference was found especially in the areas of patience/obsession, self conviction, sense of humor, curiosity, imagination, openness, adventurous spirit, and spirit of independence(p<.05). Second, the STEAM program using movies was found to be a successful way to improve their problem solving ability, and in particular, the difference was significant in the areas of planning an experiment and creative problem solving ability(p<.05). Third, the program was also found to be effective for the enhancement in their scientific attitude, and the difference, particularly in the areas of curiosity, openness, criticism, cooperation, spontaneity, patience, creativity and scientific attitude, was significant(p<.05). The study results above indicated that the STEAM program using movies was an efficacious way in forming creative personality, and enhancing creative problem solving ability and scientific attitude.

• Journal of Korean Home Economics Education Association
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• v.26 no.2
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• pp.69-87
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• 2014

This research is to develop ethical clothes consumption education program that adopts PBL which is student centered professor-learning method where the learner actively participates in lessons to recognize problems and solve them. This research also tried to see the changes in the students' ethical clothes consumption awareness and problem solving skills and self-directed learning ability after applying this program to lessons. With total of four study topic, seven ethical clothes consumption education programs were developed, and the actual lesson was conducted in controlled group and experiment group. Summary of this research is as followed: First, ethical clothes consumption education program was developed using PBL. Second, teenagers' ethical clothes consumption awareness increased much more than before the course. As both the control group and the experiment group were proven to have high ethical clothes consumption involvement and awareness, it was possible to confirm there is a need for systematic and continuous consumption education at school. Third, when a post test on changes in problem solving ability and self-directed learning ability after applying PBL based ethical clothes consumption education program was conducted, students' problem solving ability was enhanced and both factors, the awareness and behavior of self-directed learning, showed significant difference.