• Journal of the Korean Professional Engineers Association
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• v.41 no.3
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• pp.45-49
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• 2008

Considering domestic situation such as economical crisis, $CO_2$ exhaust amount limit based on the Climatic Change Convention, sky-rocketed oil prices. 97% of energy import from abroad, and import sum reaching up to 20% of entire import, we need to invest new recycle energy and future energy development at a full blast.

• Journal of applied mathematics & informatics
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• v.36 no.3_4
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• pp.301-306
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• 2018

I obtain the optimal portfolio and consumption strategies of an investor who have a Cobb-Douglas utility function. And I assume that there is negative wealth constraints. This constraints mean that the investor can borrow partially against her future labor income.

• Toxicological Research
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• v.7 no.2
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• pp.113-128
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• 1991

Hepatotoxicity has many facets. Those to be discussed in this review include the mechanism for the hepatotoxic effects, nature of the injury, and animal models of hepatotoxicity suitable for the detection of chemical injury. Some therapeutic drugs used for treatment of hepatitis are also presented. In addition, as an important and serious problem in future, alternative toxicity testing is discussed.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.42 no.1
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• pp.143-150
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• 2019

We focus on the weapon target assignment and fire scheduling problem (WTAFSP) with the objective of minimizing the makespan, i.e., the latest completion time of a given set of firing operations. In this study, we assume that there are m available weapons to fire at n targets (> m). The artillery attack operation consists of two steps of sequential procedure : assignment of weapons to the targets; and scheduling firing operations against the targets that are assigned to each weapon. This problem is a combination of weapon target assignment problem (WTAP) and fire scheduling problem (FSP). To solve this problem, we define the problem with a mixed integer programming model. Then, we develop exact algorithms based on a dynamic programming technique. Also, we suggest how to find lower bounds and upper bounds to a given problem. To evaluate the performance of developed exact algorithms, computational experiments are performed on randomly generated problems. From the results, we can see suggested exact algorithm solves problems of a medium size within a reasonable amount of computation time. Also, the results show that the computation time required for suggested exact algorithm can be seen to increase rapidly as the problem size grows. We report the result with analysis and give directions for future research for this study. This study is meaningful in that it suggests an exact algorithm for a more realistic problem than existing researches. Also, this study can provide a basis for developing algorithms that can solve larger size problems.

• Journal of the Korea Society of Computer and Information
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• v.22 no.9
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• pp.141-148
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• 2017

In this paper, we propose that Health Education Program can be a competency strengthening program based on the training of excellent healthcare professional in the future by confirming that this paper is effective in improving social problem solving ability and self-leadership in health college students. Methods: This study was designed using the nonequivalent control group pre-posttest design. Sixty students were assigned either to the experimental group (30 students) or control group (30 students). Data were analyzed with $x^2-test$ and t-test using SPSS/WIN 20.0 program. Results: The experimental group showed significant higher scores for social problem-solving ability (t=2.12, p=.038) and self-leadership (t=2.91, p=.007) compared to the control group 5 weeks after the program finished was supported by significant differences in the scores between the two groups. Conclusion: These findings showed that the Health Education program has a significant effect on improving social problem-solving ability and self-leadership in nursing college students and the program can be used as a tool to promote the social problem-solving ability and self-leadership of Health college students. Further studies are warranted to examine long term effects of health education.

• Journal of Korean Elementary Science Education
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• v.37 no.3
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• pp.323-338
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• 2018

The aims of this study are to develop the STEAM program focused '3D printing for respiratory system' and to ascertain its influence on elementary student's science process skills, creative problem solving abilities and scientific interest. The developed STEAM program was applied to 5th grade students of O elementary school located in J city. As a result of applying the STEAM program, the experimental group of the STEAM program class improved significantly in creative problem solving abilities and scientific interest than the control group of the theoretical class. The result of learner satisfaction survey of the STEAM program was high. Meanwhile, there was no significant difference in science process skills between the two groups. Therefore, the STEAM program class with the theme of '3D printing for respiratory system' could be meaningful works to encourage students' interest as well as their creative problem solving ability and scientific interest. In future, continuous and systematic studies on STEAM programs focused on 'structure and function of our body' are needed for elementary students' cognitive and affective developments.

• Journal of East-West Nursing Research
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• v.20 no.2
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• pp.154-159
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• 2014

Purpose: The purpose of this study was to examine the effects of team-based learning (TBL) program on problem solving ability, critical thinking disposition and self-directed learning in junior nursing students caring for patients with respiratory diseases. Methods: One-group pretest-posttest design was used. TBL program was carried out for 2 hours a week for 6 weeks. Data were collected by questionnaires from 167 nursing students from March 6 to June 5, 2013. Data were analyzed by paired t-test and Pearson correlation coefficient. Results: At the completion of TBL program, significant improvement was found in problem solving ability (t=-6.04, p<.001), critical thinking disposition (t=5.02, p<.001) and self-directed learning (t=5.96, p<.001). There was a significant positive correlation among problem solving ability, critical thinking disposition and self-directed learning. Conclusion: In conclusion, TBL is a useful teaching and learning method on nursing students. We suggest that it is needed to measure the educational effects of TBL against other teaching methods in the future studies.

• International journal of advanced smart convergence
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• v.11 no.2
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• pp.194-204
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• 2022

This study is a one-group pretest-posttest design to evaluate the effect of problem-based learning (PBL) for patient safety on self-leadership, patient safety competencies, and reflective thinking of nursing students. The research was conducted from March 2 to April 15, 2022, in which 57 nursing students participated. PBL for patient safety was examined in a total of 8 sessions in the order of motivation, problem identification, task performance planning, problem-solving methods, summary and solution, presentation, and evaluation. The following topics of patient safety were selected for each team: nursing records, high-alert medication, medication error and intravenous fluid regulation, blood transfusion care, fall, bedsore, infection control, and pain management. We provided feedback on the learning process and outcomes of nursing students. According to the results, self-leadership showed a statistically significant improvement in self-expectations (t=2.60, p=0.01), goal setting (t=2.84, p<0.01), self-reward (t=3.32, p<0.01), and self-criticism (t=2.32, p=0.02). Patient safety competencies showed a statistically significant improvement in patient safety knowledge (t=13.05, p<0.001) and patient safety skills (t=4.87, p<0.001) but not in reflective thinking. The results prove that PBL for patient safety is an effective teaching-learning strategy to improve self-leadership and patient safety competencies. Future studies must develop and validate specific and long-term teaching-learning methods to improve reflective thinking.

• Journal of Ethics
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• no.76
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• pp.305-329
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• 2010

The problem of freedom is inseparably related to human life. It makes this not to be regarded as a problem restricted to the professional domain of ethics. It suggests rather that the problem of freedom is intimately connected with the philosophical groundwork for discussing the future direction of society, culture and science, and its regulative idea, a philosophical discussion which comes up inevitably with various social, economic and political problems, and problems related to the spirit of law. In this view, when we want to explain the problem of freedom as a fundamental one in reference to future direction of humanities and to find out a solution to this, our research only in accordance with the approach of history of philosophy runs into difficulties. The reason is that the problem of freedom has nowness together with historicity. Finding this problem to be a present one in our concrete human life, we can discuss it more meaningful under the methodological frame changed and developed by philosophical reflections since the modern age. And here I think a culturalistic approach reinterpreting hermeneutic insight and pragmatistic context methodologically can provide a pertinent clue for a theoretical work to investigate the problem of freedom and to find a solution to that because this approach considers historicity and nowness. For this purpose analysing truth intersubjectively and understanding freedom critically, this article tries to reconstruct symbolic interpretation and the concept of self constructed in community of language and action as a cultural horizon of freedom.

• Proceedings of the Korean Society for Bioinformatics Conference
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• 2005.09a
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• pp.96-100
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• 2005

This paper studies the problem of inferring a chemical compound from a feature vector consisting of the numbers of occurrences of vertex-labeled paths, which has potential future applications for designing new chemical compounds based on the kernel methods. This paper shows that the problem for outerplanar graphs of bounded degree can be solved in polynomial time if an alphabet is fixed and the maximum length of paths and the number of edges of each face are bounded by a constant. It is also shown that the problem is strongly NP-hard even for trees of unbounded degree.