• Journal of the Society of Naval Architects of Korea
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• v.58 no.3
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• pp.144-157
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• 2021

Brake Horse Power (BHP) reduction ratios by air injection to the underside of the hull surface in an actual ship are predicted using an unstructured finite-volume CFD solver and compared with the sea trial results. In addition, air lubrication system installed on the existing vessel is investigated to find a good solution for additional drag reduction. As a results, it is found that the thickness of the air layer should be minimized within a stable range while securing the area covered by the air layer as much as possible. Furthermore, the amount of frictional drag reduced by air injection is found to be independent of surface roughness and still effective on rough surface. Based on the results of this study, it is expected that systematic and reliable air lubrication system can be designed and evaluated using the proposed method.

• The Korean Journal of Air & Space Law and Policy
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• v.32 no.2
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• pp.3-31
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• 2017

On 12 October 2017, the English Royal Courts of Justice delivered its decision about air carrier's compensation liability for the flight delay. In the cases the passengers suffered delays at a connecting point and, consequently, on arrival at their final destination. They claimed compensation under Regulation 261/2004 (the "Regulation"), as applied by the Court of Justice of the European Union (the "CJEU") in Sturgeon v. Condor [2009]. The principal issues were whether delays suffered by the passengers during the second leg of their respective journeys were compensable under the Regulation, whether there was jurisdiction under the Regulation and whether the right to compensation under the Regulation is, insofar as non-Community air carriers are concerned, excluded by virtue of the exclusive liability regime established under the Montreal Convention 1999. The passengers, the plaintiff, argued that the relevant delay was not that on flight 1 but that suffered at the "final destination". They maintained that there was no exercise by the EU of extraterritorial jurisdiction as the delay on flight 2 was merely relevant to the calculation of the amount of compensation due under the Regulation. The air carrier, the defendant, however argued that the only relevant flights for the purpose of calculating any delay were the first flights (flights 1) out of EU airspace, as only these flights fell within the scope of the Regulation; the connecting flights (flights 2) were not relevant since they were performed entirely outside of the EU by a non-Community carrier. Regarding the issue of what counts as a delay under the Regulation, the CJEU held previously on another precedents that the operating carrier's liability to pay compensation depends on the passenger's delay in arriving at the "final destination". It held that where the air carrier provides a passenger with more than one directly connecting flight to enable him to arrive at their destination, the flights should be taken together for the purpose of assessing whether there has been three hours' or more delay on arrival; and that in case of directly connecting flights, the final destination is the place at which the passenger is scheduled to arrive at the end of the last component flight. In addition, the Court confirmed that the Regulation applied to flights operated by non-Community carriers out of EU airspace even if flight 1 or flight 2 lands outside the EU, since the Regulation does not require that a flight must land in the EU. Accordingly, the passengers' appeal from the lower Court was allowed, while that of air carrier was dismissed. The Court has come down firmly on the side of the passengers in this legal debate. However, this result is not a great surprise considering the recent trends of EU member states' court decisions in the fields of air transport and consumer protection. The main goal of this article is to review the Court's decision and to search historical trend of air consumer protection especially in EU area.

• Journal of Korea Port Economic Association
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• v.28 no.2
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• pp.195-211
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• 2012

As the globalisation of corporate's managemental environment, all parts of logistics such as procurement, production and sales are globalized. The ways of transportation in Korea and Japan, where are difficult to use land-transportation, are sea-transportation and air-transportation. Sea & air is a way of the international transportation which is combined by Sea and Air to reduce the transportation fee and shorten the delivery time. The main body of multimodal transportation service is the corporate, actual carrier who undertakes the actual transport. It is essential to establish service quality to maintain their going concern. In other words, the actual carrier has to emphasize the importance of service quality to forwarder tan any other business conditions. In this study, we examine the determinants of service quality for actual carrier in multimodal transportation. Through the multi-regression analysis based on SERVPERF by Cronin and Taylor (1992), we analyze the service quality dimensions of actual carrier. Also we examine the relations between the determinants and customer's satisfaction. Using statistical hypothesis testing, the determinants of service quality are reliability, responsiveness, assurance, tangibles, and we could look into the factors which the actual carrier should control with priority.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.22 no.1
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• pp.32-43
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• 2014

Worldwide, air transport demand of this century is expanding rapidly, and each countries' demand is also increasing. Thus a number of low-cost carriers emerged in existing air transportation business sector and airman qualification check work regarding aviation safety management is increasing too. As the remedy for the result of aviation safety audit by ICAO and FAA in 2001 that governmental activity for aviation safety had been performed by a small number of aviation safety inspectors, airman qualification inspection system implemented by airlines was improved and the government has established the system that authorized airman qualification inspectors check airmen qualification with airlines according to the international trend. This study suggests the need of improvement of airman qualification inspection system that existing inspection system as the means of safety management can be transferred to Operations Safety Inspection(OSI) activity which is compliant with international standards.

• The Korean Journal of Air & Space Law and Policy
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• v.31 no.1
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• pp.99-144
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• 2016

The summary of the case is as follows: a Korean passenger booked and purchased a business class ticket from Air France that was scheduled to depart from Paris and arrive in Seoul. When the passenger arrived at the check-in counter, he was told that all business class seats were occupied. It was because the flight was overbooked by Air France. The passenger cancelled the Air France flight and took another air carrier. After arriving in Korea, he brought suit against Air France for damages. The purpose of this article is to discuss the governing law when interpreting the contract of international air carriage in accordance with the Korean Private International Act (2001) and to analyze air carrier's civil liability for the bumped passenger in the overbooking case. If the parties have not chosen the applicable law the contract shall be governed by the law of the habitual residence of the consumer in the following situations: prior to the conclusion of the contract, the opposite party of the consumer conducted solicitation of transactions and other occupational or business activities by an advertisement in that country or conducted solicitation of transactions and other occupational or business activities by an advertisement into that country from the areas outside that country and the consumer took all the steps necessary for the conclusion of the contract in that country or in case the opposite party of the consumer received an order of the consumer in that country [Article 27 (1), (2) of the Private International Act]. Since the contract of international carriage falls into the consumer contract, the Supreme Court viewed that the governing law of the contract in this case would be the law of the habitual residence of the consumer (Supreme Court Decision 2013Da8410 decided on Aug. 28, 2014). This interpretation differs from the article 5 (4) of Rome Convention(80/934/EEC) which declares that the consumer contract article shall not apply to neither a contract of carriage nor a contract for the supply of services where the services are to be supplied to the consumer exclusively in a country other than that in which he has his habitual residence. Even though overbooking can be considered as a common industry practice, an air carrier must burden civil liability in case of breach of contract for the involuntary bumped passenger(Seoul Central District Court Decision 2014Na48391 decided on Jan. 29, 2015). In case of involuntary bumping, an air carrier must offer re-routing to passenger's final destination by an alternative flight. If an air carrier fails to effect performance in accordance with the tenor and purport of the obligation, the involuntary bumped passenger may claim damages(Article 390 of the Civil Code).

• Journal of Welding and Joining
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• v.5 no.2
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• pp.17-26
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• 1987

In this study, the experiments were carried out for the purpose of establishment of the arc sparing method which reducing oxides or oxide film by using the inert gas as the carrier gas of atomizing particles. Main results obtained are as follows; 1. Oxides and oxide film which lower the adhesion strength are largely reduced by using the inert gas as the carrier gas of atomizing particles, and adhesion strength of coating film are improved. 2. The coating film characteristics appear to be no difference between the inert gas arc spraying in air environment and that in argon gas environment. 3. Inert gas arc spraying using argon as the carrie gas has higher reduction rate of composition element in coating film than compressed air spraying does.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2002.11b
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• pp.857-862
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• 2002

Compressor is a major noise source of air-conditioner. Especially, its low frequency band noise below 1000Hz is very important because it will not be attenuated by passing through the cover panel and heat exchanger in air-conditioner. The factors affecting the low frequency band noise are studied by geometric similarity along with several experiments, and the low frequency noise is closely related with the discharge holes of muffler as well as the cavity of lower shell. The low frequency band noise is significantly reduced by proposed designs.

• The Korean Journal of Air & Space Law and Policy
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• v.1
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• pp.47-85
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• 1989

The Fundamental purpose of the Warsaw Convention was to establish uniform rules applicable to international air transportation. The emphasis on the benefits of uniformity was considered important in the beginning and continues to be important to the present. If the desire for uniformity is indeed the mortar which holds the Warsaw system together then it should be possible to agree on a worldwide liability limit. This liability limit would not be so unreasonable, that it would be impossible for nations to adhere to it. It would preclude any national supplemental compensation plan or Montreal Agreement type of requirement in any jurisdiction. The differentiation of liability limits by national requirement seems to be what is occurring. There is a plethora of mandated limits and Montreal Agreement type 'voluntary' limits. It is becoming difficult to find more than a few major States where an unmodified Warsaw Convention or Hague Protocol limitation is still in effect. If this is the real world in the 1980's, then let the treaty so reflect it. Upon reviewing the Warsaw Convention, its history and the several attempts to amend it, strengths become apparent. Hijackings of international flights have given rise to a number of lawsuits by passengers to recover damages for injuries suffered. This comment is concerned with the liability of an airline for injuries to its passengers resulting from aviation terrorism. In addition, analysis is focused on current airline security measures, particularly the pre-boarding screening system, and the duty of air carriers to prevent weapons from penetrating that system. An airline has a duty to exercise a high degree of care to protect its passengers from the threat of aviation terrorism. This duty would seemingly require the airline to exercise a high degree of care to prevent any passenger from smuggling a weapon or explosive device aboard its aircraft. In the case an unarmed hijacker who boards having no instrument in his possession with which to promote the hoax, a plaintiff-passenger would be hard-pressed to show that the airline was negligent in screening the hijacker prior to boarding. In light of the airline's duty to exercise a high degree of care to provide for the safety of all the passengers on board, an acquiescene to a hijacker's demands on the part of the air carrier could constitute a breach of duty only when it is clearly shown that the carrier's employees knew or plainly should have known that the hijacker was unarmed. A finding of willful misconduct on the part of an air carrier, which is a prerequisite to imposing unlimited liability, remains a question to be determined by a jury using the definition or standard of willful misconduct prevailing in the jurisdiction of the forum court. Through the willful misconduct provision of the Warsaw Convention, air carrier face the possibility of unlimited liability for failure to implement proper preventive precautions against terrorist. Courts, therefore, should broadly construe the willful misconduct provision of the Warsaw Convention in order to find unlimited liability for passenger injuries whenever air carrier security precautions are lacking. In this way, the courts can help ensure air carrier safety and prevention against terrorist attack. Air carriers, therefore, would have an incentive to increase, impose and maintain security precautions designed to thwart such potential terrorist attacks as in the case of Korean Air Lines Flight No.858 incident having a tremendous impact on the civil aviation community. The crash of a commercial airliner, with the attending tragic loss of life and massive destruction of property, always gives rise to shock and indignation. The general opinion is that the legal system could be sufficient, provided that the political will is there to use and apply it effectively. All agreed that the main responsibility for security has to be borne by the governments. I would like to remind all passengers that every discovery of the human spirit may be used for opposite ends; thus, aircraft can be used for air travel but also as targets of terrorism. A state that supports aviation terrorism is responsible for violation of International Aviation Law. Generally speaking, terrorism is a violation of international law. It violates the soverign rights of the states, and the human rights of the individuals. I think that aviation terrorism as becoming an ever more serious issue, has to be solved by internationally agreed and closely co-ordinated measures. We have to contribute more to the creation of a general consensus amongst all states about the need to combat the threat of aviation terrorism.

• Journal of ILASS-Korea
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• v.13 no.3
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• pp.126-133
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• 2008

The atomization characteristics of the dual air supplying two-fluid nozzle were investigated experimentally using PIV and PDA systems. The twin-fluid nozzle is composed of three main parts: the feeding injector to supply fluid that is controlled by a PWM (pulse-width modulation) mode, the adaptor as a device with the ports for supplying the carrier and assist air, and the main nozzle to produce sprays. The main nozzle has the swirler with four equally spaced tangential slots, which gives the injecting fluid an angular momentum. The swirl angle in the swirler varied with $0^{\circ}$, $30^{\circ}$, $60^{\circ}$ and $90^{\circ}$. The ratios of carrier air to assist air and ALR (total air to liquid) were 0.55 and 1.23, respectively. The macroscopic behavior of the spray was investigated using PIV system, and the AMD and SMD distributions of the sprays were measured using PDA system. As a result, the SMD distribution increases along the radial distance, and it decreases with the increase of swirl angle in swirler.

• Journal of Advanced Navigation Technology
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• v.27 no.2
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• pp.173-181
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• 2023

Aircraft carriers need to maintain an orderly flow of aircraft in order for military ships to conduct combat through aircraft. Maintaining aircraft flow is an important factor in strengthening ship and aviation safety. In order to maintain aircraft flow, it is essential to develop a state-of-the-art air control system that provides higher quality control information by simultaneously accommodating radar-based monitoring information and monitoring information based on CNS integrated technology. Based on this point, this study describes the function and operation method of specific control equipment for the operation of the Aviation Support System and Air Traffic Control System required to operate light aircraft carriers in Korea based on overseas cases.