• Journal of the Korea Institute of Military Science and Technology
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• v.20 no.3
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• pp.345-351
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• 2017

A wind tunnel test for the scaled parachute models was performed to verify aerodynamic characteristics for practical usage of Korean low cost low altitude aerial delivery system. The cruciform shaped cargo parachute models for heavy and light weight were ejected into wind tunnel test section; and the drag forces acting on the models in steady condition were measured in accordance with velocity. Also, the maximum opening forces during inflation were obtained and captured by a high speed camera to analyze the inflation characteristics and evaluate the design of the low cost aerial delivery system. The results showed a reliable stability and met the design requirement of delivery operation system for R.O.K Air Force.

• Journal of Drive and Control
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• v.10 no.2
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• pp.1-6
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• 2013

This study describes a method which can attenuate reaction force effectively for an air spring system composed of an air spring and auxiliary chamber. For the analysis, the nonlinear governing equation of the air spring system is derived. For a performance improvement of the system, change of the heat transfer effect and the mass flow rates is included in the analysis of the air spring system. The simulation study is presented to show the reaction force is changed by variations in heat transfer characteristics and the air spring system of isothermal process has the best performance. As a result, to improve attenuation characteristics of reaction force, a process in the air spring system should be maintained near isothermal process.

• Journal of The Korean Association of Information Education
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• v.13 no.3
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• pp.303-312
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• 2009

In order to establish an air force e-learning system, we analysed previous researches on air force education systems and conducted a survey on 3,597 air force trainees. Most of trainees have little experience on e-learning and do not understand it. But if they were given an opportunity, they would like to take a e-learning course. They had a lot of requests about function improvement for learning management systems, preferred individual education rather than collective education, and did not wanted to take an e-learning class at a computer laboratory. In this study, we found four elements that need to establish e-learning system for air force. They are content, trainer, trainee and service. Also, we suggested improvement plans for each elements.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.21 no.4
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• pp.639-643
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• 2012

The hip protector has been developed using the air-bag which has the capability of attenuating an impact. The impact force using the PVC air-bag was decreased by values of 27.5% on average, compared to the impact force without the air-bag. In the experiment, the standard deviation of the impact force attenuation rate was 0.78%. It means that the dimensions of the air-bag have no significant effects to reduce the impact. We believe that it is possible to design light and cheap hip protectors with air-bag to prevent the femur fracture.

• Proceedings of the Korean Vacuum Society Conference
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• 2008.02a
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• pp.76-76
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• 2008

• Journal of the Korean Society for Aviation and Aeronautics
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• v.27 no.1
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• pp.1-9
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• 2019

The purpose of this study was to investigate the relationship among Calling, Role conflict, and Turnover intention of Republic of Korea Air force pilot. Specifically, we examined the mediating effect of Role conflict on the relationship between Calling and Turnover intention. Survey data from 211 Pilots in R.O.K. Air force bases were analyzed with Structural equation model, using AMOS 21.0. Results are as follows. First, Calling had negative relationships with Role conflict and Turnover intention. Second, Role conflict had a positive relationship with Turnover intention. Third, Role conflict partially mediated on the relationship between Calling and Turnover intention. These findings suggest that Calling may play a critical role in Turnover intention and Role conflict of R.O.K. Air force pilot. Finally, we discussed the implications of these results, limitations, and research suggestions for the future research.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.31 no.1
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• pp.1-10
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• 2023

This study investigated the accident cases of the U.S. Air Force and the R.O.K. Army. It analyzed the accident factors of the unmanned aircraft system using case analysis on unmanned aircraft system operators of the R.O.K. Air Force. Following the analysis this paper suggested safety operation plans for the R.O.K. Air Force. The risk factors of unmanned aircraft system were summarized by collecting and analyzing accident cases of unmanned aircraft system by the U.S. Air Force, collecting and analyzing accident risk factors of RQ-4 operators of the R.O.K. Air Force. Through the analyzed risk factors, a safety operation plan for the semi-automatic unmanned aircraft system and the fully automatic unmanned aircraft system was presented.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.1051-1052
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• 2023

조류충돌(Bird Strike)은 경제적 손실, 인명적 피해를 야기하여 공군의 항공작전을 제한하는 위협요소이다. 현 공군에서는 조수퇴치조(Bird Alert Team)의 경보 발령에 의존하거나 조류의 행동을 연구하는 등 인적 역량에 의존하는 시스템을 채택하고 있다. 본 연구는 CNN을 이용하여 활주로의 유해조류를 인식 및 분류하는 자동화 시스템에 대한 제안이다. 웹캠을 활용한 실시간 유해조류를 인식하는 연구를 통해 향후 운항관제대와의 연계, 지향성 조류퇴치 장비와의 연동 방안을 제시하여 공군의 조수퇴치조(Bird Alert Team)에 대한 자동화를 실현하고 공군에서 추진중인 스마트 비행단에 이바지하고자 한다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.46 no.4
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• pp.209-217
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• 2023

In this study, the evaluation items related to the effectiveness evaluation of the LVC (Live, Virtual, Constructive) training system of the Air Force were derived and the weights of each item were analyzed. The LVC training system evaluation items for AHP (Analytic Hierarchy Process) analysis were divided into three layers, and according to the level, 3 items were derived at level 1, 11 items at level 2, and 33 items at level 3. For weight analysis of evaluation items, an AHP-based pairwise comparison questionnaire was conducted for Air Force experts related to the LVC training system. As a result of the survey, related items such as (1) Achievement of education and training goals (53.8%), (1.2) Large-scale mission and operational performance (25.5%), and (1.2.1) Teamwork among training participants (19.4%) was highly rated. Also, it was confirmed that the weights of evaluation items were not different for each expert group, that is, the priority for importance was evaluated in the same order between the policy department and the working department. Through these analysis results, it will be possible to use them as evaluation criteria for new LVC-related projects of the Air Force and selection of introduction systems.

• Journal of the Korea Institute of Military Science and Technology
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• v.26 no.5
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• pp.431-438
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• 2023

The information about battlefield environment changes and operational impacts on Korean Peninsula due to climate change is essential for national defense. In this study, the future impact of four ground operations was analyzed by using the national climate change standard scenario based on the IPCC 6^th report. As a result, it was analyzed that the number of operational-limited days for ambush and airlift operations would decrease, making the operational environment favorable. However, the operational environment unfavorable as the number of operational-limited days for crossing and reconnaissance operations increase, but the number is not large so much.