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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society for Aviation and Aeronautics
Journal Basic Information
Journal DOI :
The Korean Society for Aviation and Aeronautics
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Volume & Issues
Volume 19, Issue 4 - Dec 2011
Volume 19, Issue 3 - Sep 2011
Volume 19, Issue 2 - Jun 2011
Volume 19, Issue 1 - Mar 2011
Selecting the target year
Free-wing Tilt-body Aircraft Controllerability Analysis
Park, Wook-Je ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 1~6
The free-wing tilt-body aircraft is researched in the flight performance characteristics such as short take-off and landing capability, and reduced sensitivity to gust and center of gravity (CG) change. Due to the main wing separating from the fuselage, the high tiltable empennage, and the stub-wing strongly influencing from the propeller wake, the resulting vehicle aerodynamics and flight dynamics are quite different from those of a conventional fixed-wing aircraft. Using the governing flight dynamics model was studied previously, all of speed and body tilt angle is simulated to determine the flight envelope by a non-linear 3-DOF flight simulation analysis. Though flight performance and trimmability are studied, the flight model of free-wing tilt-body aircraft is to reduce the hidden risk and to achieve the successful flight test. It is analyzed the flight characteristics that distinguishes free-wing tilt-body aircraft from the conventional aircraft.
Combustion Experiment Measurement Uncertainty for Hybrid Rocket Motor
Kim, Soo-Jong ; Moon, Hee-Jang ; Kim, Jin-Kon ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 7~14
In this study, the measurement uncertainty of combustion experimental system and experimental parameters for hybrid rocket were evaluated by B type evaluation method. The measurement uncertainty of all experimental parameters was lower than 3%. The highest value of expanded uncertainty was characteristic velocity efficiency with 2.83% and the expanded uncertainty of regression rate which is the design and performance parameter was indicated to 0.03%. These results shown that the reliability of hybrid combustion system was located within allowed limits.
Multi-Crack Problems for Non-homogeneous Material Subjected to Unsteady Thermal Load
Kim, Kui-Seob ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 15~23
The purpose of this paper is to investigate the time behavior of a multiple crack problems. It is assumed that the medium contains cracks perpendicular to the crack surfaces, that the thermo-mechanical properties are continuous functions of the thickness coordinate. we use the laminated composite plate model to simulate the material non-homogeneity. By utilizing the Laplace transform and Fourier transform techniques, the multiple crack problems in the non-homogeneous medium is formulated. Singular integral equations are derived and solved to investigate the multiple crack problems. As a numerical illustration, transient thermal stress intensity factors(TSIFs) for a functionally graded material plate subjected to sudden heating on its boundary are provided. The variation in the TSIFs due to the change in material gradient and the crack position is studied.
A Study on the Operational Ceiling Forecasting and its Improvement Using a Mesoscale Numerical Prediction Model over the Korean Peninsula
Lee, Seung-Jae ; Kim, Young-Chul ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 24~28
This paper reviews a ceiling prediction method based on a mesoscale meteorological modeling system in South Korea. The study was motivated by the tendency of higher model ceiling height than the observed in daily operational forecasts. The goal of the paper is to report an effort to improve the operational ceiling prediction skill by conducting numerical experiments controlling a model parameter. In a case experiment, increasing constant values used in the relationship between extinction coefficients and concentration showed better performance, indicating a short-term strategy for operational local ceiling forecast improvement.
A Study on the Critical Meteorological Factors Influencing the Flight Cancelation and Delay: Focusing on Domestic Airports
Lee, Joong-Woo ; Ko, Kwnag-Kun ; Kwon, Tae-Sun ; Lee, Ki-Kwang ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 29~37
Last April, Europe was severly damaged as all social and economic activities came to a halt prompted by the cancellation of all flights resulting from volcanic ash. This exemplifies that the meteorology conditions have significant influence on the flights of airplanes. Hence, in this research the influence that the meteorology has on the domestic flights and its characteristics will be examined, and the core meteorological factors that influence flights in each airport will be drawn. In order to do this, statistical analysis on the influence that the meteorology has on flights was carried out in order to analyze the data about flight cancelation and delay and also its cause, primarily based on the Gimpo, Gimhae, and the Jeju airports. As a result, first, the meteorological factors which impact flight cancellation and delay were different among the domestic airports, and second, it was analyzed that fog was the main meteorological factor in the Gimpo airport, strong wind in the Jeju airport, and fog in the Gimhae airport. Third, between the day the flights were cancelled and delayed occurred, and the day that weren't, the fact that there existed a difference among the actual meteorological factors was statistically drawn. With the result of such analysis, meteorological factors pertaining to the cancellation and delay of flights must be considered seperately by each airport and specialized meteorological information must be provided accordingly. Further, when selecting the position of an airport that is to be constructed in the future, implications that there is a definite need for the meteorology effect evaluation based on past meteorology data can be drawn.
A Research on Airline Customer Service Employees' Characters and their Service Attitudes focusing on K-Airline Service center
Ha, Sook-Ja ; Kim, Ki-Woong ; Park, Sung-Sik ; Choi, Duk-Jin ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 38~48
This paper tried to research a field employee's character, its correlation to service attitude and its impact on service using MBTI characteristics functional indicators, working at airline customer service center. It is proved employees with Sensing Feeing(SF), Intuition Feeling(NF) and Intuition Thinking(NT) have showed lower satisfaction on their duty than employees with Sensing Thinking(ST) have. In analysis of MBTI characteristics' impact on organization-related characteristics, it is also found out employees with Sensing Feeing(SF) and Intuition Feeling(NF) have showed lower trust than employees with Sensing Thinking(ST) have. Considering other controled factors, this paper found that the more job satisfaction employees have, employees with 1 to 5 years of experience on their duty showed more significant service-focused attitude. Moreover, deputy directors or high-ranked people with the higher job satisfaction were seemed to be more service-oriented.
The Comparative Analysis of Perceived Risks in South Korean Low Cost Carriers and Full Service Carriers
Choi, Hew-Jong ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 49~57
This paper concentrate on the passengers' perception of risks by analyzing data gathered through a field survey in the South Korean air market. Twenty two Koreans were killed in the accident of PMT Air in the Kingdom of Cambodia on June 25th 2007 and This has caused customers to be more concerned about the safety of airline. Three hundred forty-two samples were collected from field survey at Kimpo International Airport in Seoul and Jeju International Airport on Jeju island and the findings are based on 316 questionnaires. The multiple regression analysis, Analysis of variance (ANOVA), Correlation analysis, T-test were carried out to examine the effect, relationship and difference of data set. The results show that there are differences between passengers' perceived risks in LCC's and those in FSC's. Passengers of LCC's took serious consideration of the type of fleet and feeling physical risk, whereas those of FSC's only took consideration of financial risk.
An Effect of Cabin Crew's Leadership on Leadership Effectiveness
Park, Hye-Yoon ; Kim, Min-Su ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 58~65
The purpose of this study is to describe upon the most effective leadership stlyes for Airlines based on the transformational and transactional leadership that Bernard M.Bass proposed. The outcome of leadership treated here will be employee's extra efforts, employee's satisfaction with the leader, the effectiveness of the leader, involvement by employees in the organization, and management outcomes perceived by employees. The result of correlation showed that transformational leadership factors had positive impacts on the outcomes of leadership, but the transactional leadership had a negative impact on outcomes of leadership. According to results of multiple regression analyses, transformational leadership had a grater positive impact on outcomes of leadership than did transactional leadership. Transformational leadership is expected to promote and enhance the effectiveness of the hotel leaders, as well as the airline employee's extra effort, their satisfaction with the leader, involvement in the organization, and their perception of management outcomes. It is imperative that the airline industry continues to develop transformational leader.
A Study for Flight Times and Ages affects on Situation Awareness Evaluation of Helicopter Pilots
Choi, Sung-Ho ; Lee, Yeong-Heok ; Choi, Yeon-Chul ; Lee, Meong-Hyun ; Park, Sun-Rae ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 66~73
According to U.S. NTSB, from 1989 to 1992, Situation Awareness(SA) was a major factor causing 80% of all aircraft accidents in scheduled airlines. Therefore, the prevention of accidents through effective training in SA became a pivot in aviation safety. Furthermore, during the past 10 years, since all helicopter accidents in Korea were caused by the factors related to SA, an appropriate countermeasure has been required. This study, which uses survey data, examines various factors related to SA that could affect helicopter pilots. Common characteristics of situation awareness factors are that the result from the independent variables which are flight time, duty period and age of a first officer is statistically significant with the result from the independent variables of an instructor pilot's. However, only experience is statistically significant independent variable for factors influencing decision making in emergency situations, but anxiety, expectation and comprehension are not significant.
A Research on Premium In-Flight Service by Enhancing Service Quality focusing on K-Airline's Passengers and Cabin Crews
Na, Eun-Jung ; Kim, Ki-Woong ; Yoon, Young-Pyo ; Park, Sung-Sik ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 74~87
This paper tried to research the relationship among the passenger's satisfaction and expectation of in-flight service quality, overall satisfaction and passenger's Loyalty by emphasizing on two groups of passengers and cabin crews from K-airline to find out which service quality area should be focused on for pursuing premium in-flight service. Such six service quality areas as in-flight equipment, food&beverage, duty-free sales, service ability, service image and specialized service were conceived and survey questions were made based on relevant previous researches. The analysis has used the data of 281 passengers and 336 cabin crews from K-airline. According to the analysis, in physical service factors, passengers perceive satisfaction from duty-free sales contributes to overall service satisfaction. However, cabin crews believed in-flight equipment and food&beverage are important to overall service satisfaction. In human service factors, both groups seemed to agree service ability and service image have a positive impact on overall service satisfaction. Among service satisfaction factors, the customer's satisfaction from cabin crew's service ability(service response, professional knowledge and foreign language skill) is also proven to be directly connected to customer loyalty.
A Study on Improvement of International Standard Establishment for New CNS/ATM Systems
Park, Hyeong-Taek ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 88~93
In order to ensure the safety, regularity and efficiency of air transportation, ICAO has established the international standards for air navigation systems since 1940s. In 1991, ICAO announced the concept of New CNS/ATM systems and recommended States to carry out the development of the sub systems as well as propose the standards due to many problems caused by service limitations and considerable errors from the conventional systems. As a result, international standards for 21 systems have been established. However, many problems have also been raised. In this paper the problems on new international standard establishment are analyzed and the measures to cure them are suggested.
Development of Chollian Bipropellant Propulsion System
Han, Cho-Young ; Lim, Cheol-Ho ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 94~100
This paper gives a brief overview of the COMS CPS development process from start to finish. The manufacturing techniques used for CPS were founded on established generic processes that have been developed and proven on previous satellite programs, and have used the expertise and facilities in the framework of international collaboration. Manufacture and testing of the CPS were successfully accomplished, and COMS CPS demonstrated good performance in the launch phase.
A Study on Operability of Smart UAV in the NAS
Kim, Do-Hyun ; Kim, Joong-Wook ;
Journal of the Korean Society for Aviation and Aeronautics, volume 19, issue 1, 2011, Pages 101~107
A UAV is defined as a powered, aerial vehicle that does not carry a human operator, and can fly autonomously or be piloted remotely. UAV operations have increased dramatically during the past several years in both the public and private sectors. The utilization of UAV and the activities of diverse widening, now the challenge was how to operate and integrate UAV safely in the NAS. The purpose of this study is to look around the trend for operability of Smart UAV in the NAS and to provide its implications and the future direction of integrated operating airspace focusing on U.S. where R&D and demand of UAV are the most in the world.