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Fuzzy (r, s)-S_1-pre-semicontinuous mappings
이석종,김진태 한국지능시스템학회 2011 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.11 No.4
In this paper, we introduce the notion of fuzzy (r, s)-S_1-pre-semicontinuous mappings on intuitionistic fuzzy topological spaces in ˇ Sostak’s sense, which is a generalization of S_1-pre-semicontinuous mappings by Shi-Zhong Bai. The relationship between fuzzy (r, s)-pre-semicontinuous mapping and fuzzy (r, s)-S_1-pre-semicontinuous mapping is discussed. The characterizations for the fuzzy (r, s)-S_1-pre-semicontinuous mappings are obtained.
Pairwise Preopen and Preclosed Mappings in the Intuitionistic Smooth Bitopological Spaces
이석종,김진태 충청수학회 2019 충청수학회지 Vol.32 No.4
'We introduce the intuitionistic fuzzy pairwise preopen and preclosed mappings in the intuitionistic smooth bitopological spaces, and obtain the characterizations for the mappings.
Fuzzy Almost Strongly (r, s)-Semicontinuous Mappings
이석종,김진태 한국지능시스템학회 2012 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.12 No.2
In this paper, we introduce the concept of fuzzy almost strongly (r; s)-semicontinuous mappings on intuitionistic fuzzy topological spaces in ˇ Sostak’s sense. The relationships among fuzzy strongly (r; s)-semicontinuous, fuzzy almost (r; s)-continuous, fuzzy almost (r; s)-semicontinuous, and fuzzy almost strongly (r; s)-semicontinuous mappings are discussed. The characterization for the fuzzy almost strongly (r; s)-semicontinuous mappings is obtained.
이석종,이강석,박원태 한국항공운항학회 2022 한국항공운항학회지 Vol.30 No.2
An empirical analysis was conducted on the workload of helicopter pilots flying in high-risk flight environments such as ground obstacles and weather effects at low altitudes. To evaluate the workload, an independent sample t-test was performed using the NASA-TLX evaluation method most suitable for the aviation field, and the workload score was calculated by applying the analytical stratification method (AHP) to compare and analyze private and commercial pilots. There is a significant difference in mean between private and commercial pilots and the result of work load was obtained over 70%. This paper studied the 'surprise and startle effect' on the helicopter field for the first time. In the future, it is intended to contribute to the safe operation of helicopters by presenting a method for effective safety management by utilizing it in the field of education and training for helicopter pilots and providing basic data for preventing accidents caused by human error.