• 산경연구논집
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• 제13권10호
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• pp.9-14
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• 2022

Purpose: With the rapid development of China's e-commerce industry, the express delivery industry is also advancing by leaps and bounds. While express brings convenience to people's life, a large number of express packages are disposed of at will, which not only increases a large amount of domestic waste, but also causes environmental pollution and waste of resources. Therefore, express packaging recycling has become a consensus in all fields of society. Research design, data and methodology:According to the characteristics of express packaging recycling, other variables were introduced into the TPB model proposed by AJZEN, and based on previous literature research and research assumptions, a model of influencing factors of consumer behavior in express packaging recycling was constructed. Results: The results show that in addition to reward factors, other factors have a significant positive impact on the respondents' willingness to recycling. Conclusions: In order to enhance consumers' willingness to recycle express delivery and effectively carry out express packaging recycling, the following suggestions are put forward: the government should formulate a comprehensive express delivery recycling policy, strengthen policy publicity, and standardize consumers' express packaging recycling behavior. Improve consumers' awareness of express packaging recycling, and promote the increase in the scale of express packaging recycling.

• 한국철도학회:학술대회논문집
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• 한국철도학회 1998년도 창립기념 춘계학술대회 논문집
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• pp.160-171
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• 1998

Express subway system is one of the effective systems adapting to improve service level. Express trains make fewer passenger stop, using a double track or a bypass track, than local trains which served all stations, Express service has been very popular with passengers who travel uninterrupted between terminals, but is has generated some dissatisfaction among passengers who experience longer waiting time on stations. This study aims at proposing the methodology to analyze changes of travel pattern in subway system adapting the express service and to estimate the time saving effects resulting from the installation of the express system. This methodology is evaluated in the fifth line under an assumpt ion that express subway system are adapted. Based on the results of the case study, the following conclusions are made: First, express system reduce a total travel time of 13% or above. Second, shorter headway of express trains increases the time saving effects on subway system. although it requests more waiting time to local train passenger. Third, an installation of Express system to Seoul subway system can augment subway demand in seoul metropolitan area.

• 통상정보연구
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• 제6권3호
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• pp.183-201
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• 2004

Recently, Electronic commerce market is growing sharply for the expansion of internet and development of means of air transportation. Import Clearance System for express consignments, introduced in Korea, confers some benefit upon express consignments, ie. prompt clearance, simplification of the clearance procedure, exemption of necessary documents. But it has some problems such as lack of social security and trade compliance. So it requires some improvements as follows. Firstly, it has no legal background to clear all articles valued at US$100 or less carried by an express consignment operator. So customs brokers, not express consignment operators, should clear that articles. Secondly, it should be presented necessary documents including commercial invoice to prevent a wrong price declaration in entering express consignments valued at US$100 or less. Thirdly, X-ray inspectors must enhance their inspection ability. Customs must provide education programs for X-ray inspectors to improve their inspection ability. Lastly, Cargo selectivity system for express consignments have to be improved to operate effectively.

• 한국항공우주학회지
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• 제48권12호
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• pp.1005-1012
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• 2020

PCI-Express 버스를 적용하는 항공전자 시스템은 CPU와 입출력 장치를 하나의 채널만을 사용하여 연결하기 때문에, 불행하게도 그 채널에 고장이 발생하면 적어도 하나의 입출력 장치를 사용할 수 없게 되는 문제가 있다. 본 논문은 항공전자 시스템을 위한 PCI-Express 버스의 결함감내 구조를 제시하기 위해서, PCI-Express 채널을 이중화하여 하나의 채널에 고장이 발생하여도 고장이 발생하지 않은 다른 채널을 통해 여전히 정상적으로 기능하는 버스 구조를 제시한다. 논문에서 제시하는 버스 구조는 두 개의 CPU port에서 출력된 이중적 PCI-Express 버스 신호를 각각의 switch 회로에 입력되게 하고, 이 회로가 각 입출력 장치에 결함을 감내하도록 선택된 독립된 버스 채널을 제공하게 한다. 본 논문에서는 제시하는 버스 구조를 구현 및 실험하여 하나의 PCI-Express 버스에 고장이 발생하면, 그 고장 상황을 실시간으로 감지되고, 고장이 발생하지 않은 다른 버스로 채널을 전환되어 정상적으로 통신이 수행되는 것을 보인다.

• 전자공학회논문지
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• 제52권8호
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• pp.74-85
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• 2015

PCI Express는 프로세서와 시스템의 IO 장치들을 연결하기 위하여 널리 사용되는 업계 표준이다. PCI Express 는 이전 PCI 표준에서 유래하며, 전통적으로 하나의 PC 혹은 서버 내에서 사용되어져 왔다. PCI Express의 고속, 저전력, 고효율 특성은 기존 시스템 연결망과는 다른 형태의 대안 연결망으로써 고려되고 있다. 본 논문에서는 이와 같은 PCI Express를 이용한 시스템 연결망(PCIeLINK)을 설계, 구현하고 초기 시험 결과를 제시한다. 본 논문에서는 PCI Express를 이용한 fail-over 시스템에 자주 사용되는 non-transparent bridging(NTB)기법을 이용하여 PCI Express 기반 시스템 연결망을 설계, 구현 하였다. NTB는 PCI Express 장치를 단순 연결할 경우 발생되는 전기적, 논리적 충돌을 방지하는 기법으로써, PCI Express Gen2 규격에 기반한 20 Gbps급의 ${\times}4$ 연결을 하나의 카드에 복수개 구현하고 이를 시험하였다. 개발된 PCI Express기반 시스템 인터커넥트 장치는 최대 8.6 Gbps의 단방향 성능을 보였으며, Linux 기반의 TCP/IP 환경에서 최대 5.1 Gbps의 성능을 나타내는 것으로 측정 되었다.

• 무역상무연구
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• 제50권
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• pp.163-185
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• 2011

The purpose of this paper is to suggest competitiveness promotion factors of korean Parcel Express Service Industry. This study considered in terms of three competitiveness promotion factors which are a firm's subjective factors, a industrial environment factors, and a governmental policy factors. According to analysis results of the factors, a firm's subjective factors(4.07 score) are scored the most ones of competitiveness promotion factors of korean Parcel Express Service Industry, to be compared with a industrial environment factors(3.89 score), with a governmental policy factors(3.76 score). Therefore, first of all, korean Parcel Express Service firms have to promote competitiveness through as follows : (1) speedy meeting to customer's needs, (2) to promote customer service, to reduce delivery lead time, (3) to procure reliability of Parcel Express Service with customers mutually, (4) strategy of global Parcel Express Service.

• Journal of Information Processing Systems
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• 제13권1호
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• pp.95-103
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• 2017

The PCI Express is a widely used system bus technology that connects the processor and the peripheral I/O devices. The PCI Express is nowadays regarded as a de facto standard in system area interconnection network. It has good characteristics in terms of high-speed, low power. In addition, PCI Express is becoming popular interconnection network technology as like Gigabit Ethernet, InfiniBand, and Myrinet which are extensively used in high-performance computing. In this paper, we designed and implemented a evaluation platform for interconnect network using PCI Express between two computing nodes. We make use of the non-transparent bridge (NTB) technology of PCI Express in order to isolate between the two subsystems. We constructed a testbed system and evaluated the performance on the testbed.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.645-656
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• 2008

The operation of express train on the Seoul Metropolitan Subway Network is centered on the Kyungbu and Kyungin lines and the short section between Dongducheon station and Ganyung station which is 20.7km long. It is true that the needs of many customers who want to reduce their commuting hours by express train is not satisfied. This paper proposes that the operation of express trains be enlarged to Sungbuk station on Kyungwon line which comes to 34.9 km long, and to Yangsu station from Youngsan station on Jungang line. The type of operation is mixed one with high and low speed trains, which operates express train by use of existing siding tracks without improving facilities such as extra building of sidings. This pragmatic study is to apply the goal of reducing running time as express train and to suggest the selection of appropriate stops, effectivenes analysis of express train operation and formation of train diagrams to actual operation.

• 전자통신동향분석
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• 제22권4호통권106호
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• pp.133-143
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• 2007

PCI Express는 고속 차동신호를 사용한 점대점(point-to-point) 프로토콜로 신호무결성(signal-integrity) 측정을 위해 기존의 병렬버스신호와 다른 파라미터(parameter)들이 사용되고 있다. PCI Express 시스템에서 중요한 전기 파라미터는 loss와 jitter이며 eye diagram을 통해서 분석이 가능하다. 본 고는 PCI Express 송수신 버퍼의 전기 규격과 애드인카드(add-in card) 시스템의 전기적 여유(budgets)의 의미와 분석을 다룬다. 또한 실제적인 PCI Express 시스템에서 전기 파라미터들을 측정하고 분석, 디버깅의 방법을 다룬다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 컴퓨터소사이어티 추계학술대회논문집
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• pp.41-44
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• 2003

In this paper, we propose design of PCI Express Physical Layer for IP. The proposed design is compatible with PCI Express Base specification Revision 1.0a. and supports only single Lane. The best feature of this design is that Physical Layer includes Power Management block. Therefor, the entire design of PCI Express component is simplified. In the near future, as optimizing this design and extending Lane, we will redesign Physical Layer.