• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.189-190
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• 2018

국내 해기 교육기관에서는 초급항해사들이 운항 경험과 기술을 습득할 수 있도록 선박조종시뮬레이션 교육을 필수로 이수하도록 한다. 그러나 이러한 시뮬레이션 교육은 교육 기간 및 내용에 대해서만 국내외 지침에 명시되어 각 교육기관에서는 자체 커리큘럼에 의하여 시뮬레이션 시나리오를 구성하고 있다. 하지만 실제 어떠한 환경의 해역에서 시뮬레이션 실습을 수행하였는지는 초급항해사가 경험과 기술을 습득하는데 중요한 역할을 한다. 따라서 본 연구에서는 PARK Model을 이용하여 시뮬레이션 시나리오의 난이도를 추정하고, 난이도에 따라 초급항해사의 운항기술을 타선박과의 이격거리, DCPA, PARK Model 위험도 값, 항로탈거리의 요소로 그 변화를 분석하였다. 이는 추후에 난이도 별로 시나리오를 구성하여 균일한 교육 커리큘럼을 수립하는데 기초 자료로 사용될 수 있을 것이다.

• Proceedings of the Korea Database Society Conference
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• 2008.05a
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• pp.87-106
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• 2008

This study identified the properties of online game, and analyzed existing studies on the impact of the properties of online game on flow. As a result, graphics, sounds, scenarios, game speed, manipulability, and item difficulty were identified as properties of online game, which were influential factors to flow. As a result, the hypotheses on scenarios, game speed, and item difficulty were adopted as significantly influential factors to flow, Attribute of online game. Meanwhile, the hypotheses on graphics, sounds, and manipulability, which were expected to significantly impact flow, were rejected.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.7
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• pp.571-577
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• 2019

This study examined the usability of express buses for wheelchair users to identify the effectiveness, efficiency and satisfaction of wheelchair boarding systems. The usability of 11 manual wheelchair users and nine powered wheelchair users was evaluated using the following three scenarios: boarding the wheelchair accessible bus, moving inside, and alighting the bus. The results showed that 20 wheelchair users completed three scenarios, which was distributed between 0.33 and 1.36 in the difficulty rating scale of the efficiency. The task effort of the efficiency was measured from 8.36 to 11.78. The acceptability of the satisfaction was distributed between 1.00 and 2.00, and the system usability scale was measured in an acceptable boundary of the C grade at 70.7 points with manual wheelchair users and a B grade at 73.1 points with powered wheelchair users. This study has academic significance because it provides basic evidence for accessibility, securing the right to movement and research methods of public transportation for people with disabilities. To improve the quality level of usability in the future, more study with a larger number of research participants and various wheelchair types should be studied.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.30 no.6
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• pp.1217-1223
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• 2020

The Block cipher CHAM is lightweight block cipher for low-end processors, developed by National Security Research Institute from Korea. The mode of operation is necessity for efficient operation of block cipher, among them, the counter (CTR) mode has good efficiency because it is easy to implement and supporting parallel operation. In this paper, we propose the optimized implementation for block cipher CHAM-CTR. The proposed implementation can be skipped some rounds by pre-computation. Thus it has better calculating speed than existing CHAM. Also, this implementation pre-load some of round keys to registers, before entering round functions. It makes reduced 160cycles loading time for round key load. Finally, proposed implementation achieved higher performance about 6.8%, and 4.5% for fixed-key scenario, and variable-key scenario, respectively.

• The Korean Journal of Emergency Medical Services
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• v.26 no.3
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• pp.161-184
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• 2022

Purpose: This study aimed to develop a cardiopulmonary resuscitation training program for firefighters (FD-CPR) to help improve the survival rate after cardiac arrest on the fireground. Methods: The FD-CPR was developed following 3 steps of the FD-CPR instructional design based on the behaviorism theory. The content of the program was validated by a group of 7 experts using the contents validity index (CVI) and through a pilot-test. Results: A scenario consisting of 7 procedures, and a skill performance evaluation tool consisting of 16 questions were developed. The evaluation tool average score for the difficulty test was 41.16% (even) and that for the discrimination test was 0.32 (high). Subsequently, an 80 min training program was developed. As verified by the 7 experts through the CVI, it was as high as 1.0. Conclusion: The FD-CPR developed domestically for the first time in this study was effective in enhancing the CPR performance skills of the firefighters. If FD-CPR is added to the curriculum at the Fire Service Academy educational course for the new firefighters, the CPR performance skills could be maintained. Furthermore, the program can facilitate a better survival rate for colleagues having cardiac arrest on the field.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.23 no.1
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• pp.29-35
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• 2023

In this paper, we propose a SW-EDU bot, a chatbot learning model for coding education by using a chatbot system. The same scenario-based models are created on the basis of Dialogflow and Kakao i Open Builder, which are representative chatbot builders. And then a SW-EDU bot is designed and implemented by selecting the builder more appropriate to our purpose. The implemented chatbot system aims to learn effective learning methods while encouraging self-direction of users by providing learning type selection, concept learning, and problem solving by difficulty level. In order to compare the usability of chatbot builders, five indicators are selected, and based on these, a builder with a comparative advantage is selected, and SW-EDU bot is implemented based on these. Through usability evaluation, we analyze the feasibility of SW-EDU bot as a learning support tool and confirm the possibility of using it as a new coding education learning tool.