• Title, Summary, Keyword: Passenger cabin

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Optimal Dual Pricing and Passenger Safety Level for Cruise Revenue Management

  • Cho, Seong-Cheol;Zhang, Mengfei
    • Journal of Navigation and Port Research
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    • v.41 no.2
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    • pp.63-70
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    • 2017
  • Despite the remarkable continual growth of the world cruise industry, studies have yet to be attempted on many revenue management problems in cruise operations. This paper suggests two schemes that can be easily applied to cruise revenue management: optimal dual pricing and passenger safety level. In optimal dual pricing, a pair of higher and lower prices is applied to cabin reservation through market segmentation. This scheme can be executed with a linear price-response function for the current unreserved cabins. A cruise line could benefit from this scheme to maximize reservation revenue while attaining full occupancy. The dual pricing scheme is also devised to produce only integer demands to suit real management practices. The life boat capacity is an additional service capacity unique to the cruise industry, catering to passengers' safety. The concept of passenger safety level is defined and computed for any passenger life boat capacity of a cruise ship. It can be used to evaluate the passenger safety of a cruise ship in operation, as well as to determine the number of life boat seats required for a new cruise ship. Hypothetical examples are used to illustrate the operation of these two schemes.

PIV Measurements of Ventilation Flow from the Air Vent of a Real Passenger Car (거대 화상용 PIV 시스템을 이용한 실차 내부 공기벨트 토출흐름의 속도장 측정 연구)

  • Lee, Jin-Pyung;Kim, Hak-Lim;Lee, Sang-Joon
    • Journal of the Korean Society of Visualization
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    • v.7 no.1
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    • pp.3-8
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    • 2009
  • Most vehicles have a heating, ventilating and air conditioning (HVAC) device to control the thermal condition and to make comfortable environment in the passenger compartment. The improvement of ventilation flow inside the passenger compartment is crucial for providing comfortable environment. For this, better understanding on the variation of flow characteristics of ventilation air inside the passenger compartment with respect to various ventilation modes is strongly required. Most previous studies on the ventilation flow in a car cabin were carried out using computational fluid dynamics (CFD) analysis or scale-down water-model experiments. In this study, whole ventilation flow discharged from the air vent of a real passenger car was measured using a special PIV (particle image velocimetry) system for large-size FOV (field of view). Under real recirculation ventilation condition, the spatial distributions of stream-wise turbulence intensity and mean velocity were measured in the vortical panel-duct center plane under the panel ventilation mode. These experimental data would be useful for understanding the detailed flow structure of real ventilation flow and validating numerical predictions.

COMPUTATIONAL SIMULATION OF FIRE SUPPRESSION SYSTEM FOR CABINS OF SHIPBOARD ENCLOSURE (선박 거주구역용 소화시스템의 전산 시뮬레이션)

  • Jung, I.S.;Chung, H.T.;Han, Y.S.
    • Journal of computational fluids engineering
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    • v.21 no.4
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    • pp.40-45
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    • 2016
  • The numerical simulation has been performed to predict the performance of the fire suppression system for cabin of shipboard enclosure. The present study aims ultimately at finding the optimal parametric conditions of the mist-injecting nozzles using the CFD methods. The open numerical code was used for the present simulation named as FDS (Fire Dynamics Simulator). Application has been done to predict the interaction between water mist and fire plume. In this study, the passenger cabin was chosen as simulation space. The computational domains for simulation in the passenger cabin were determined following the fire scenario of IMO rules. The full scale of the flow field is $W{\times}L{\times}H=4{\times}3{\times}2.4m^3$ with a dead zone of $W{\times}L{\times}H=1.22{\times}1.1{\times}2.4m^3$. The water mist nozzle is installed in ceiling center of 2.3 m height from the floor, and there are six mattresses and four cushions in the simulation space. The combination patterns of orifices to the main nozzle and the position to install nozzles were chosen as the simulation parameters for design applications. From the present numerical results, the centered-located nozzles having evenly combined orifices were shown as the best performance of fire suppression.

A Study on the Characteristics of Internal and External Pressure Variation for KTX (KTX차량 내외부의 압력변동 특성에 관한 연구)

  • 남성원
    • Journal of the Korean Society for Railway
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    • v.7 no.1
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    • pp.26-31
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    • 2004
  • A study is conducted to clarify internal and external pressure variation of passenger cabin for KTX. These pressure variation may give rise to the ear-discomfort for passenger and fatigue for carbody. In this study, the pressure variation of interior, gangway and exterior of KTX passenger car is measured by using the atmospheric pressure sensors and portable data acquisition system. The tunnel from 4000m to 200m in length are chosen far the investigation of tunnel length effects. From the results of experiment, the pressure variation of interior per second is under the ear-discomfort limitation in all of tunnel. And, We found that there are similar patterns of exterior pressure variation for each critical tunnel length. These results generally agree to RTRI's experimental result fur Shinkansen.

A Prediction of Change on the Body Style Proportion of the Future Passenger Cars (향후의 승용차 차체 스타일 비례의 변화 예측)

  • Koo, Sang
    • Archives of design research
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    • v.13 no.2
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    • pp.25-32
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    • 2000
  • The body proportion of a passenger car has been changed by the demand of consumer and the market. Now the interior space proportion on a passenger car become to have the importance as the passenger space and this proportion has been changed as the new models have been developed. It didn't seems to had a unified direction or strategy in the dimensions of the domestic passenger cars on the early models, but they had a specific changes in dimensions on the later models. The proportion of the wheelbase and greenhouse can be calculated into as about 58% and 57% on the compact and sub-compact passenger cars while it is about 56% on mid-size sedan type passenger cars for thier 3-box structure body concept. The overrall proportion of the interior space is bigger on the compact and the sub-compact passenger cars than the mid-size passenger cars as the calculation shows. It can be concluded that the interior space proportion on the compact passenger cars would become larger, which is closed to 60%. And this trend would be appear on the mid-size passenger cars.

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Application of Human Machine Interface and Augmented Reality Technology to Flight Operation (인간-기계 인터페이스 및 증강현실 기술의 항공운항 분야 적용)

  • Park, Hyeong Uk;Chung, Joon;Chang, Jo Won;Joo, Seonghyeon;Hwang, Young Ha
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.27 no.2
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    • pp.54-69
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    • 2019
  • The primary objective of this paper is to introduce the application of Human-Machine Interface (HMI) and Augmented Reality (AR) technologies in flight operations. These include: self-check-in, baggage handling, airport security and surveillance, airport operations monitoring, In-Flight Entertainment and Connectivity (IFEC), cockpit design, and cabin crew support. This paper investigates the application status and development trends of HMI and AR technologies for airports and aircraft. These technologies can provide more efficient in-flight passenger service and experience by using AR devices. This paper also discusses the developments such as; the Integrated Control Application (ICA) for the IFEC interface, AR flight simulation training program using the fixed-based simulator, and the AR aircraft cabin interior concept test program. These applications present how HMI and AR techniques can be utilized in actual flight operations. The developed programs in this paper can be applied to their purpose within aircraft interiors and services to enhance efficiency, comfort, and experience.

An Experimental Study on the Benefit of Pre-ventilation Using Solar Sunroof (쏠라 썬루프를 이용한 주차환기 시스템의 효과에 관한 실험적 연구)

  • Lee, Daewoong
    • Transactions of the Korean Society of Automotive Engineers
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    • v.22 no.6
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    • pp.89-95
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    • 2014
  • This study presented the benefit of the pre-ventilation using solar sunroof with integrated photovoltaic. Recent year, auto-makers make an effort to enhance the fuel efficiency and moreover to clean the cabin passenger's health. Solar energy, one of the alternative energies, adapted in automotive air handling system, in order to pre-ventilation when vehicle parked under the sun in summer. The power generated by a prototype solar sunroof has been used to run blower in a air handing system. And the solar sunroof was installed in a vehicle, and evaluated to find out benefit of the pre-ventilation. The effect of reducing the cabin temperature about $3^{\circ}C{\sim}10^{\circ}C$ with 20 ~ 40W power generator from solar sunroof were obtained in the pre-ventilation test. This reduced thermal load can lead to the reduction of air-conditioning operation time than that of current car. Moreover, fuel economy may increase as a results of the short use of the air-conditioning time. Additionally, Total Volatile Organic Compounds in the cabin is reduced maximum 80% than that of the current vehicle.

Numerical Simulation of Pressure Change inside Cabin of a Train Passing through a Tunnel (터널을 통과하는 열차의 객실 내 압력 변동 해석)

  • Kwon, H.B.;Yoon, S.H.;Nam, S.W.
    • 한국전산유체공학회:학술대회논문집
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    • pp.337-342
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    • 2011
  • The pressure transient inside the passenger cabin of high-speed train has been simulated using computational fluid dynamics(CFD) based on the axi-symmetric Navier-Stokes equation. The pressure change inside a train have been calculated using first order difference approximation based on a linear equation between the pressure change ratio inside a train and the pressure difference of inside and outside of the train. The numerical results have been assessed for the KTX train passing through a 9km long tunnel of Wonju-Kangneung line at the speed of 250km/h assuming that the train is satisfying the train specification for airtightness required by the regulation.

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A Study on Flight Phobia and the Countermeasure (비행공포증과 대책에 관한 연구)

  • Ahn, Y.T.;Choi, Y.C.
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.17 no.1
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    • pp.64-70
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    • 2009
  • Because of globalization, flight trips are generalizing, however in proportion to this, it is increasing that people who afraid of riding an airplane because of flight phobia. ‘Flight Phobia’ is individual problem; however it can be factors to suspend of flight schedules. This research is experimental analyzed the recognition degree of flight attendants and cabin attendants about flight phobia and suggested the direction of management about related problems. This research examines meanwhile overlooked importance of flight phobia and the actual condition and if problems are happened, this research will be used valuable to manage quickly and safely.

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An experimental study on the application of water mist system in cabin on a passenger ship (여객선 선실 적용을 위한 미분무수 소화설비의 실험적 연구)

  • Han, Yong-Shik;Choi, Byung-Il;Kim, Myung-Bae;Lee, Yu-Whan;Do, Kyu-Hyung;Kim, Chang
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • pp.385-388
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    • 2012
  • 여객선의 선실(cabin)에 적용하기 위한 미분무 소화설비(water mist system)가 개발되었다. 미분무헤드는 8개의 오리피스로 구성된 조기반응 응답특성을 가진 폐쇄형으로, 사용압력과 유량계수(Flow constant)는 각각 1.4MPa과 13.1이다. IMO(국제 해사기구)의 거주구역 소화시스템 성능기준인 Resolution MSC.265(2008)는 선실 적용을 위해 4개의 화재시나리오에 대한 성능판정 기준을 제시하고 있는데, 본 연구에서는 4개의 화재시나리오를 적용한 실물화재실험을 수행하였으며, 이 기준에서 제시한 성능 판정기준을 만족하는 결과를 얻었다. 2011년 국가화재안전 기준 NFSC 104A 기준 정립으로 국내에 도입되기 시작한 미분무소화설비가 적용분야를 넓혀 가는데 도움이 되길 기대해 본다.

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