• 한국항공우주학회지
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• 제46권5호
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• pp.436-444
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• 2018

본 연구의 목적은 국내 저가항공사의 노선 효율성을 평가하는 데 있다. 저가 항공사의 경우 정규 항공사와 달리 국내선과 근거리 국제선만을 운영하고 있어서 매출수익의 원천이 정규항공사에 비해서 다양하지 않다. 특히, 국내 저가 항공사의 경우 화물운송 없이 여객운송과 부가서비스를 통하여 매출수익을 올리고 있다. 때문에 저비용 고효율의 여객운송 노선을 유지하는 것이 절대적으로 중요하다. 이를 위해 본 연구에서는 국내 저비용 항공사가 운영하는 노선과 정규 항공사의 노선들의 상대적 효율성을 평가하고, 평가한 효율성을 바탕으로 노선 효율성을 개선할 수 있는 방안을 제시하였다. 분석 방법은 자료포락법(DEA)을 사용하였고, 기존 문헌연구를 통하여 투입과 산출 요소를 선정하였다. 본 연구의 결과를 기반으로 항공사의 노선 및 판매 전략 수립에 도움을 줄 수 있을 것으로 판단한다.

• 유통과학연구
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• 제12권10호
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• pp.123-128
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• 2014

Purpose - The purpose of the study is to reexamine the price fairness as practiced by low cost airlines, as a consumer has to experience such inconveniences as inferior airport transportation, extra fees on in-flight meals, and non-negotiable seats, and consumers evaluate such experiences keeping in mind their total costs. This evaluation includes price fairness and allows a reasonable and overall consideration of factors of low cost airlines. It tries to set up a measurement of the indicators consumers' perceptions of price fairness academically as it adapts price fairness to airline services which are renowned for price volatility. Research design, data, and methodology - The research proposes an alternative pricing strategy for the long term profit of low cost airlines after going over conflicts between the traditional theory of consumers' price perception mechanism and flexible fair policy of low cost airlines. It was meaningful when it relates to the early stage of the business, while it enhances the risks relating to the long term survival of low cost airlines. In addition, it is significant as it highlights the negative influences on consumers' perceptions of price fairness, as low cost airlines run on extremely low cost perspectives. Results - The results of the research provide insight into four perspectives, as consumers' perceptions of price fairness are influenced by the frequency and range of price changes and services. The first perspective is that it would lead to positive price evaluation when a low cost airline cuts prices frequently with little changes than one big change. It also would lead to the same result when it comes to necessary services. The second perspective is that one big increase of price would rather undermine the negative aspects of price changes than those of several smaller ones. The third perspective is that additional services would be good to consumers' perceptions of price fairness as compared to discount benefits with respect to the cost. Finally, a low cost airline should consider that consumers will change airlines or defer their flight schedule if the flight fares increase beyond their limits. Conclusions - Low cost airlines should reconsider their pricing policies for services that were provided free earlier. A consumer would not like discount benefits when made to pay for services that were, for long, free of charge. If a low cost airline can provide services with no charge, it should improve volumes if the costs are standardized and, moreover, should consider the charging fees. Alternatively, a consumer can choose between services and fair discount. Low cost airlines are implementing sales promotion strategies, as the competition is more intense than it used to be. In these days, they should regard services over sales promotion, as consumers may prefer to spend money on good premium services. Some differentiation in services could create a good market position for the airlines and, hence, good financial performance.

• 한국산업정보학회논문지
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• 제25권6호
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• pp.55-67
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• 2020

본 연구는 LCC (Low cost carrier) 항공사 지상직 직원들의 잡 크래프팅이 개인-직무 부합과 직장만족에 미치는 영향을 살펴보았다. 이를 위해 잡 크래프팅과 개인-직무 부합, 직장 만족에 대한 개념을 정리하고 관계를 파악하여 잡 크래프팅이 항공사 지상직 직원에게 미치는 영향을 분석하였다. 본 연구는 인천국제공항에 근무하는 공항 지상직 직원들 중 LCC 항공사 지상직 직원을 대상으로 하였다. 분석 결과, 첫째, 잡 크래프팅의 하위 요소인 과업 크래프팅, 인지 크래프팅, 관계 크래프팅 중 인지 크래프팅만이 개인-직무 부합에 의한 영향을 미치는 것으로 나타났다. 둘째, 개인-직무 부합은 직장 만족에 긍정적 영향을 미치는 것으로 확인되었다.

• Journal of Positioning, Navigation, and Timing
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• 제6권4호
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• pp.181-194
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• 2017

In recent years, research has been actively conducted on the navigation in an indoor environment where Global Navigation Satellite System signals are unavailable. Among them, a study performed indoor navigation by integrating pseudolite carrier and Inertial Measurement Unit (IMU) sensor. However, in this case, there was no solution for the cycle slip occurring in the carrier. In another study, cycle slip detection and compensation were performed by integrating Global Positioning System (GPS) and IMU in an outdoor environment. However, in an indoor environment, cycle slip occurs more easily and frequently, and thus the occurrence of half cycle slip also increases. Accordingly, cycle slip detection based on 1 cycle unit has limitations. Therefore, in the present study, the aforementioned problems were resolved by performing indoor navigation through the integration of pseudolite and ultra-low-cost IMU embedded in a smartphone and by performing half cycle slip detection and compensation based on this. In addition, it was verified through the actual implementation of real-time navigation.

• 한국통신학회논문지
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• 제40권9호
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• pp.1846-1855
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• 2015

본 논문에서는 저비용 단일 GNSS(Global Navigation Satellite System) 수신기를 이용하여 정밀한 위치를 추정하는 방법으로 반송파 위상 TD(Time Differenced) 측정치를 이용한 상대위치 결정기법을 제안하고 성능을 분석하였다. 제안하는 상대위치 결정기법은 반송파 위상 측정치를 활용하지만 시각 간 차분을 사용하므로 하나의 GNSS 수신기로 동작하며, 미지정수 결정 문제를 고려하지 않아도 된다. 또한 차분 간격이 짧은 시간일 경우 공간적 공통오차 및 위성시계 오차를 효율적으로 제거할 수 있다. 제안하는 위치결정 알고리즘은 오차해석을 통해 코드측정치를 이용한 절대위치 결정기법보다 성능이 우수함을 증명하고 실차 실험으로 구현된 알고리즘 및 오차해석 결과를 검증하였다. 그 결과, 위치추정 성능은 약 10분 동안 3m이내에 수렴하여 코드기반의 절대위치기법에 비하여 약 4배 이상 향상된 정확도 및 정밀도를 확인할 수 있었다.

• 한국항공운항학회지
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• 제25권4호
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• pp.111-123
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• 2017

This study aimed at finding the ways to improve competitiveness of Korean low cost carriers in the highly competitive air transport market by understanding the relation among the influence of prior knowledge, service quality on customer satisfaction and reuse intention. The result of the research is as the following. At first, the influence of prior knowledge on customer satisfaction and reuse intention was statistically significant. The result indicates that customers who have much prior knowledge are more likely to be satisfied and to reuse. Secondly, the test for finding out the influence of service quality on customer satisfaction and reuse intention was statistically significant also. Thirdly, the results revealed that customer satisfaction positively influenced reuse intension. The influence of service quality on customer satisfaction and reuse intention reached the same research result compared with the existing literature.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 International Symposium on GPS/GNSS Vol.1
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• pp.271-275
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• 2006

This paper describes the design and realization of full attitude system based on MEMS IMU and GPS carrier phase. The work can be divided into two parts: First, initial heading is determined by using two GPS receivers. And this paper discusses the usage of space geometry conditions to reduce the range of ambiguity search. The method presented in this paper was tested on the static. On the static condition, an accuracy better than 0.06 degrees for heading for 3.48m long baseline has been achieved. Integration of GPS and low cost MEMS IMU are used to realize the real-time heading attitude system. Second, level attitude (pitch and roll) is determined using the method of frequency-velocity for the feedback control. At the same time, the method using the attitude based on MEMS IMU to help determination of the range of ambiguity search is proposed. The results done on the sea show that an alternative means to provide real-time, cost-effective, accurate and reliable attitude information for attitude surveys. Though motivated by a big ships application, the design can be applied to other vehicles.

• ETRI Journal
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• 제24권6호
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• pp.465-468
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• 2002

Ethernet passive optical networks (PONs) are an emerging access network technology that provides a low-cost method of deploying optical access lines between a carrier's central office and a customer site. In this paper, we propose a new algorithm of dynamic bandwidth allocation for multimedia services over Ethernet PONs. To implement the suggested dynamic bandwidth allocation algorithm, we present control message formats that handle classified bandwidths in a multi-point control protocol of Ethernet PONs.

• 한국항해학회지
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• 제16권2호
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• pp.1-19
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• 1992

선박설계의 과정에서의 설계변수가 건조된 선박의 운항경제성에 미치는 영향을 조사하였다. 대상선박은 산적화물선으로하였고, 전통적인 설계방식을 전산화하였고, 건조비는 국내의 대형조선소의 경우로 하였다. 경제성검토기준은 貨物運負率 (Required Freight Rate, Unit: U.S.D./Ton)를 사용하였다. 계산결과의 비교를 용이하게 하기위하여 션박의 주요치수는 무차원화하였다. 재화용량, 주요치수, 선형계수등이 운항비에 주는 영향으로 인하여 유가가 상승되면 속장비가 크고 속 력이 비교적 작은 선박이 경제적으로 우수한것으로 판단되었다. 이 프로그램은 조선소의 수주와 선주의 경영에도 많은 도움이 될것으로 생각된다.

• Journal of Positioning, Navigation, and Timing
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• 제4권3호
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• pp.123-130
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• 2015

In this study, a carrier smoothed global positioning system / dead reckoning (CSGPS/DR) integrated system for high-precision trajectory estimation for the purpose of vehicle navigation was proposed. Existing code-based GPS has a low position accuracy, and carrier-phase differential global positioning system (CPDGPS) has a long waiting time for high-precision positioning and has a problem of high cost due to the establishment of infrastructure. To resolve this, the continuity of a trajectory was guaranteed by integrating CSGPS and DR. The results of the experiment indicated that the trajectory precision of the code-based GPS showed an error performance of more than 30cm, while that of the CSGPS/DR integrated system showed an error performance of less than 10cm. Based on this, it was found that the trajectory precision of the proposed CSGPS/DR integrated system is superior to that of the code-based GPS.