• 대한조선학회논문집
• /
• 제48권1호
• /
• pp.62-66
• /
• 2011

The present work focuses on the evaluation of thermal comfort in passenger cabin of a cruise ship. A computational fluid dynamics (CFD(Airpak)) is used to calculate air velocity and temperature distribution in the passenger cabin as well as PMV and PPD. The CFD is used to simulate two different cases, room unit system and wardrobe duct system. Both of cases are simulated in summer environment condition. The room unit system and wardrobe duct system are compared and evaluated by ISO 7730 thermal comfort categories. The performance of room unit system is shown to be more effective for this typical case of passenger cabin.

• 한국항공운항학회지
• /
• 제22권1호
• /
• pp.136-144
• /
• 2014

This paper studied what kind of effects were made through Open Sky agreement on Korea-China air transport market. To analyze the effects on air transport markets brought by liberalization, this paper studied transport volume, number of airlines, passenger and cargo and routes from 2000 to 2012 Korea-China aviation statistics. Liberalization of shandong and Hainan Provinces agreed in 2006 caused significant differences in frequencies, transport volume, and the number of routes for both passenger and cargo services between 2007 and 2008, as well as statistically significant effects. The analysis on the effect of Korea-China Open skies Agreement between 2000 and 2012 was no difference because the global financial crisis in September 2008.

• 한국자동차공학회논문집
• /
• 제13권6호
• /
• pp.163-169
• /
• 2005

A theoretical formulation on the forced acoustic response of an enclosed cavity having a double air-gap resonator on one of boundary panels of the cavity is developed in the paper. The double gap resonator consists of two air-gaps and two partition sheets as in the author's previous papers. This paper reveals that the double gap resonator reduces the level of a target noise peak by splitting the peak as two small peaks, and that it is more effective when it is designed so that the upper gap thickness is larger than the lower gap thickness under the constraint that the entire gap thickness is fixed as a constant value. Finally, verification experiments show that the theoretical formulation and analysis results are valid by comparing theoretical results with experimental ones.

• 실내환경 및 냄새 학회지
• /
• 제17권4호
• /
• pp.303-314
• /
• 2018

The urban railway system is a convenient public transportation system, as it carries many people without increasing traffic congestion. However, air quality in urban railway environments is worse than ambient air quality due to the internal location of the source of air pollutants and the isolated space. In this paper, characteristics of particulate matter (PM) pollution in urban railway environments are described from the perspective of diurnal variation, chemical composition and source apportionment of PM. PM concentrations in concourse, platform, passenger cabin, and tunnel are summarized through an analysis of 34 journal articles published in Korea and overseas. This information will be helpful in developing effective policies to reduce PM pollution in urban railway environments.

• 항공우주정책ㆍ법학회지
• /
• 제9권
• /
• pp.393-419
• /
• 1997

• 한국항공운항학회지
• /
• 제25권3호
• /
• pp.89-100
• /
• 2017

In order for the international aviation community to efficiently and safely manage the gradual increase of air passenger demand, direction suggestions of airport traffic prediction based on future airport capacity requirements, airport design and infrastructure establishment is utilized by airport traffic data that is m comparable internationally. It is a global trend to pursue more efficient airport operating system structure to accept air passenger demand through more realistic comparable data in order to escape from the structure of reckless airport establishment and infrastructure composition based on passenger demand predictions referring to simple statistical data that has existed in the past. This study aimed to seek effective operational measures for the New Jeju airport scheduled to be opened in 2025 by time-series analysis. This study also analysed airport operation strategies, air traffic distribution strategies, cargo volume increase rates and its effectiveness of airports adopting the multi-airport system that have similar operational practices and geographical conditions. This study sought the most appropriate multi airport system application measures for New Jeju airport to promote efficiency and international competitiveness.

• Design & Manufacturing
• /
• 제9권3호
• /
• pp.9-13
• /
• 2015

Plastic material has been applied to many automobile parts with the automotive lightweighting trend. In this study, a passenger air bag(PAB) housing which is produced by steel material in the present were molded using a plastics material. Before design and making of a mold for the PAB housing molding, it was carried out injection molding analysis. By analyzing the deformation results, the correction dimension for mold designing was determined. The design and manufacturing the mold applied the correction dimension were conducted. It was performed actual injection molding. The warpage value of the PAB housing was similar to the warpage of the injection molding analysis.

• 대한교통학회지
• /
• 제18권1호
• /
• pp.27-34
• /
• 2000

이 연구는 최근 소비자 행동분석에서 많이 사용되고 있는 설문조사에 의한 Stated Preference의 방법론을 채택하여 항공여객수요의 가격탄력성을 분석하였다. 우리나라의 국내선 항공은 항공요금이 지금가지 인가제나 신고제로 규제되어 왔기 때문에 통상의 총량자료에 의한 회귀분석으로는 가격탄력성 도출이 어려우며 특별한 분석방법론을 필요로 한다. 이 연구에서는 항공여객에 대한 설문조사로 항공편과 철도, 버스, 승용차 등 대체교통수단과의 선택 여부에 대한 자료를 입수한 후, SP기법에 따른 Logit model로 분석하여 항공수요의 가격탄력성과 대체교통수단으로의 모드별 쉐어 변환율을 Sample Enumeration 방식에 의해 추정하였다 대체 가격탄력성은 -0.6∼-0.9의 값으로 밝혀졌으며 대체교통수단으로는 주로 철도를 선택하고 일부 버스를 선택하며 승용차는 거의 선택하지 않는 것으로 조사되었다.

• 한국항공우주법학회:학술대회논문집
• /
• 한국항공우주법학회 2008년도 제40회 국제학술발표대회
• /
• pp.153-161
• /
• 2008

What was once known as common courtesy is rapidly disappearing in the air travel industry, and the violent behavior known as air rage is a constant threat. Once sought after by other industries for advice because of its expertise in customer service, the air travel industry has now slipped to the lowest rungs of companies with unhappy customers. As airlines cut corners in order to avoid bankruptcy, passengers' patience is tested by the stress of flight delays, crowded airports and close packed seating on airplanes. This article examines the situation, strategies used by passengers and ways the airline industry might better inspire courteous behavior in passengers. A cultural expectation of entitlement and competitiveness for limited resources has led to a breakdown in civilized behavior throughout society, both in the United States and internationally. Air travelers faced with rude and intrusive behavior from others on the flight are beginning to find their own ways of coping, such as high quality headphones to block offensive noises, and mechanical devices to keep the seat in front from reclining to the point where it hits their knees. The most potentially effective remedies will come from airlines that enlist cooperation by offering effective passenger education and possibly even incentives. Acceptable airline behaviors need to be plainly defined and stressed for passengers, both before boarding and onboard. In this paper, some methods are suggested to motivate passengers and to inspire courteous behavior.

• 한국자동차공학회논문집
• /
• 제9권1호
• /
• pp.148-155
• /
• 2001

A disassembility assessment has mostly depend on the subjective decision making from the qualitative element. The work of disassembly is already classified with given disassemble points from the symbolic chart method. It is not useful in the practical assessment because it is not specified. The new method of design for disassembility assessment(DFDA) is practical to introduce the fuzzy number as the conversion of quantitative element from qualitative. It is appled to air-cleaner of passenger-vehicle for the usefulness.