• 경영과정보연구
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• 제22권
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• pp.231-254
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• 2007

This study is analyzed how much protected buying and selling service on Auction site affects to the customers' satisfaction. According to the results of it, First, considering that the aspects of the reliability of the Auction site, trade factor affects to the reliability of Auction website. Second, it shows the organized security of the site affects to the reliability. and it could be explained the escrow service has brought the customers to get the reliability of Auction website. Third, the execution of purchasing contract on website affects to the customers' satisfaction. and it makes customers confirm and rely on Auction. For example, carrying out of the escrow service, enhancement of the system for the policies for the buying protection of customers, and various concerns and efforts for the execution of the purchasing contract and so on affect to the customers' satisfaction.

• Journal of Welding and Joining
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• 제35권3호
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• pp.15-20
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• 2017

In this paper, two types of assemblies using CNT-filled SACAs (with 0.03 wt% CNTs and without CNT) were prepared to investigate the influence of carbon nanotubes (CNTs) on the reliability properties of solderable anisotropic conductive adhesives (SACAs) with a low-melting-point alloy (LMPA). Two types of reliability test including thermal shock (TS: -55 to $125^{\circ}C$, 1000 cycles) and high-temperature and high-humidity (HTHH: $85^{\circ}C$, 85% RH, 1000 h) tests were conducted. The SACA assemblies with and without CNTs showed stable electrical reliability properties due to the formation of wide and stable metallurgical interconnection between corresponding metallizations by the molten LMPA fillers. Although the mechanical pull strength of CNT-filled SACA assemblies was decreased after thermal aging (because of the excessive layer growth and planarization of the IMCs), the CNT-filled SACA with 0.03wt% CNTs showed enhanced mechanical reliability properties compared with the SACA assemblies no CNTs. This enhancement in mechanical performance was due to the reinforcement effect of the CNTs. These results demonstrate that CNTs within the CNT-filled SACAs can improve the reliability properties of CNT-filled SACAs joints due to their superior physical properties.

• 한국신뢰성학회지:신뢰성응용연구
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• 제15권2호
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• pp.108-123
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• 2015

Test and Evaluation (T&E) have been verifying the level of it's technological skill and the needed operational status of the development weapons. If the overall spectrum of test and evaluation is fulfilled substantially in the production & deployment, the needed level of the weapon system will be enhanced and also the reliability status will become higher considerably. We can know currently these issues through the mass media and all kinds of the news regarding the defense industry and programs. And so this article have studied the method of enhancing reliability of the test and evaluation, the 6 variables were selected through the discussion of the professional group. The the test and evaluation group needs consistently the professional training systems. After DT&E, we have to the event to verify the technical level of the development systems. We have to take the high level of the kinds of the environmental test. Scientific methods like system engineering will be adapted in process of the test and evaluation. The number of suitable test prototype in the test and evaluation is analysed more systematically. And we need to establish the standardization of the test and evaluation. If 6 variables are well analysed and adapted in the working field, the reliability of the test and evaluation will be considerably, the defense industry will take the chance to develope the future-oriented.

• Journal of Communications and Networks
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• 제14권6호
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• pp.629-639
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• 2012

A challenge faced by smart grid systems is providing highly reliable transmissions to better serve different types of electrical applications and improve the energy efficiency of the system. Although wireless networking technologies can provide high-speed and cost-effective solutions, their performance may be impaired by various factors that affect the reliability of smart grid networks. Here, we first suggest the use of IEEE 802.11s-based wireless LAN mesh networks as high-speed wireless backbone networks for smart grid infrastructure to provide high scalability and flexibility while ensuring low installation and management costs. Thereafter, we analyze some vital problems of the IEEE 802.11s default routing protocol (named hybrid wireless mesh protocol; HWMP) from the perspective of transfer reliability, and propose appropriate solutions with a new routing method called HWMP-reliability enhancement to improve the routing reliability of 802.11s-based smart grid mesh networking. A simulation study using ns-3 was conducted to demonstrate the superiority of the proposed schemes.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2008년도 추계학술대회 논문집
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• pp.663-664
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• 2008

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 추계학술대회 논문집
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• pp.471-472
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• 2012

• Journal of Electrical Engineering and Technology
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• 제11권5호
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• pp.1070-1076
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• 2016

• 전자공학회논문지SC
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• 제48권4호
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• pp.71-79
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• 2011

본 논문에서는 이더넷 파워링크의 마스터 이중화 기법의 실시간성 향상을 위해 PReq 신호를 이용한 원전용 실시간 제어망의 실시간성과 신뢰성을 고려한 마스터 이중화 기법을 제안하였다. 제안된 마스터 이중화 기법은 동기 구간에서 PReq 신호를 이용하여 마스터 고장을 감지하고 비동기 구간에서 AMNI 프레임을 전송하여 단위 사이클 구간 앞서서 전환이 가능하다. 이를 통해 실시간 주기 데이터의 손실 및 이로 인한 문제점들을 최소한으로 줄일 수 있다. 제안된 마스터 이중화 기법의 효용성을 증명하기 위하여 OPNET Modeler를 이용하여 성능분석 및 검증을 수행하였고 이를 통해 마스터 전환시간을 줄일 수 있음을 보였다.

• 한국통신학회논문지
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• 제38B권9호
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• pp.700-706
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• 2013

본 논문에서는 위성 통신에서 신뢰성 향상을 위한 랜덤 선형 네트워크 코딩 적용 기술을 제안한다. 제안하는 프로토콜에서는 PEP (Performance Enhancement Proxy)에서 네트워크 코딩된 여분의 패킷을 전송하여 만약 데이터 패킷이 무선 채널 에러에 의해 손실되었다 할지라도 복구 할 수 있다. 또한 본 논문에서는 제안한 프로토콜을 위성 통신에 적용했을 때의 TCP 처리율 수학적 모델을 제시하고 제안한 프로토콜의 성능을 평가했다. 성능 평가 결과, 제안하는 프로토콜은 발신 측 PEP에서 여분의 네트워크 코딩된 패킷을 전송하고 수신 측 PEP에서 여분의 네트워크 코딩된 패킷을 이용하여 손실된 패킷을 복구하기 때문에 패킷 손실률을 감소시켜 기존 TCP보다 처리율 측면에서 우수한 성능을 나타냈다.

• Communications for Statistical Applications and Methods
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• 제15권6호
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• pp.875-881
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• 2008

This paper first discusses the existing non-homogeneous Poisson process(NHPP) software reliability growth model(SRGM) frameworks with respect to capability of representing software reliability growth phenomenon. As an enhancement of representational capability a new general coverage-based NHPP SRGM framework is developed. Issues associated with application of the new framework are then considered.