• Journal of the Korean Society for Aviation and Aeronautics
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• v.24 no.4
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• pp.53-61
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• 2016

Air Traffic Controllers (ATC) are also essential to the efficiency of airports and the airline industry. With the increasing volume of traffic, managing flights is a complex and sometimes very stressful job. ATC is using radar and other technology to track planes 'en route' between airports and keep in touch with pilots. Alternatively, ATCs are liaising with the planes on approach. However, ATC's working condition is getting more stressful, as the volume of air traffic increases. Thus this paper tried to research cognitive emotional regulation, job satisfaction, and job involvement and organizational committment of ATCs under the stressful work condition, taking care of safety of a couple of hundreds passengers per plane. Using CERQ survey sheet (Cognitive Emotional Regulation Questionnaire), it was found out that positive thinking and acceptance of self-blame have a significant impact on job satisfaction, work absorption and organizational Loyalty.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.16 no.3
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• pp.265-272
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• 2004

Based on the T-method, a new scheme for predicting air flow rate distribution in a bathroom exhaust system is developed. Introduction of individual duct route enables us to disintegrate a complicated multi-fan ductwork into a set of simultaneous single-fan subsystems. The scheme is validated via the analysis of a well-posed test problem, showing physical consistency. In order to demonstrate the utility and capability of our method, the bathroom ventilation system in a 20-story residential building is selected as an example. Under the typical design condition, the air flow rate of each exhaust fan at the balancing point is successfully predicted, and such information can lead to an engineering estimation for the overall system performance. While some deficiencies in ventilation are found at bathrooms at lower floors with 6mmAq-rated exhaust fans, they disappear over the whole building by using fans of enhanced static pressures, 7 and 8mmAq. Finally the present scheme seems to be useful for practical design of multi-branched, multi-fan ventilation systems.

• Journal of Korean Society of Transportation
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• v.27 no.2
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• pp.83-91
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• 2009

This paper aims to predict air passenger and air freight demands in the air routes between South and North Korea. The air demands will be fostered by the visitors of Pyeongyang and Baekdu Mountain, whose forecasts will be used for supplying the air traffic services necessary for the active exchange and cooperation between South and North Korea in the future. The authors use the tool of regression analysis under the assumption of epoch-making progress in demand for aviation in accordance with the exchange and cooperation scenario between South and North Korea. After predicting the total number of travelers through regression analysis, the authors applied the share of air passengers among total travelers in order to predict the number of air passengers. Finally, the number of flights of each airport and route were forecasted by including the air freight, estimated from the number of air passengers.

• Journal of Korean Society of Transportation
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• v.24 no.3 s.89
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• pp.143-153
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• 2006

This paper annually estimates the economies of density, scale and scope with the data of cost and output of 27 leading air carriers to suggest the political findings and strategies of raising the cost efficiency of our air transport industry. The estimation results and their implications are as follows. First, KAL and Aha would reduce their cost if they could increase international route density. Second, KAL and AAR would reduce their cost if they could expand the network but save their cost more effectively if they could increase international route density rather than expand the network. Third, the minimum efficient scale that minimize average cost of two national flag carriers which operate by the present output ratio among domestic passenger, international passenger and freight appears to be larger than each present output level of KAL and AAR. Meanwhile, it appears that minimum efficient scale of small size low cost carriers which operate domestic-oriented route is much smaller than minimum efficient scale of national flag carriers. Finally, it appears that there exists the diseconomies of scope between domestic passenger and the other outputs, that is, international passenger and freight and therefore save their cost if freight output ratio is higher and domestic passenger output ratio is lower than the Present level.

• Journal of Korea Port Economic Association
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• v.37 no.4
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• pp.13-31
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• 2021

Since the signing of the Korea-Europe Free Trade Agreement, the volume of trade transactions between South Korea and Europe has increased. The traditional single-mode transport system has been transformed into an intermodal transport system using two or more modes of transport. In addition, the conventional sea and air transport routes have been restricted, leading to a decline in Korean exports to Europe, and the rail transport mode is becoming mainstream in the market due to the influence of COVID-19. This paper focuses on the China-Railway Express to explore a new intermodal transport route from Korea to Europe. First, the fuzzy analytic hierarchy process (AHP) is used to evaluate the factor weights when selecting intermodal transport routes from Korea to Europe. Then, the TOPSIS (Technique for Order of Preference by Similarity to Ideal Solution) method is used to rank three alternatives. The results show that among the four factors (total cost, total time, transportation capability, and service reliability), the total cost is the most significant factor, followed by the total time, service reliability, and transportation capability. Furthermore, the alternative route 1 (Incheon-Dalian-Manchuria-Hamburg) is preferred.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.6D
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• pp.761-770
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• 2009

The energy efficiency and environment-friendly aspect of the railway system would be superior to other on-land ransportation systems. In a preliminary feasibility study stage and selection of optimal railway route, the energy efficiency and problems related to environment are usually considered. For the selection of optimal railway route, geographical features and facility of management are generally considered. Environment effect factors for the selection of environment-friendly railway router are focused and studied in this paper. In this study, various analysis of opinion of specialists (railway, environment, transport, urban planning, survey) and the guideline for construction of environment-friendly railway were accomplished. From these results of various analysis, 7 major categories (topography/geology, flora and fauna, Nature Property, air quality, water quality, noise/vibration, visual impact/cultural assets) were extracted. To select environment friendly railway route, many alternatives should be compared optimal route must be selected by a comprehensive assessment considering these 7 categories. To solve this problem, the selected method was AHP which simplifies the complex problems utilizing hierarchy, quantifying qualitative problems through 1:1 comparison, and extracting objective conclusions by maintaining consistency. As a result, a GUIbased program was developed which provides basic values of weighted parameters of each category defined by specialists, and a quantification of detailed assessment guidelines to ensures consistency.

• Proceedings of the KSR Conference
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• 2004.06a
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• pp.842-846
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• 2004

Both traffic congestion and air pollution in the metropolitan area can be greatly relieved by promoting the use of public transportation with zero emission system. Bus and subway are very convenient means for the people moving in the route areas. But they are not enough to satisfy handicapped or old people to have access to them and also do not solve environmental problems completely. New vehicle system, fuel cell track rapid transit, will be introduced as a countermeasure for such problems in the present paper.

• Proceedings of the Korean Society of Toxicology Conference
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• 2002.05a
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• pp.69-70
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• 2002

Arsenic (As) is a ubiquitous element found in several forms in foods and environmental media, such as soil, air, and water. The primary route of human exposure is through ingestion of arsenic-contaminated food and drinking water. The predominant form of arsenic in drinking water is inorganic arsenic, which is both highly toxic and readily bioavailable.(omitted)

• Proceedings of the SAREK Conference
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• 2007.06a
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• pp.97-97
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• 2007

• Proceedings of the Korea Information Processing Society Conference
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• 2020.05a
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• pp.378-381
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• 2020

항공/여행 상품은 타 산업보다 불확실성에 취약하며 시간의 절대적인 종속성으로 인해 정확한 수요 파악 및 예측을 하지 못할 경우 가치가 0으로 수렴한다. 이에 본 논문은 웹 크롤링을 기반으로 잠재여행 욕구를 파악하고, 향후 성장할 것으로 예상되는 항공 노선 및 취항지를 예측 및 분석하는 기법을 제안하고자 한다.