• Journal of the Korean Applied Science and Technology
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• v.32 no.1
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• pp.40-47
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• 2015

Single-walled carbon nanotubes (SWNTs) was modified with various length of linear alkyl chains and passivated to form dielectric filler. The modified SWNTs embedded into epoxy matrix to fabricate a flexible composite with high dielectric constant. The dielectric behavior of the composite was significantly changed with various alkyl chain length(n) of pyrene. The dielectric constant of the epoxy/SWNTs composite significantly increased with respect to increase in length of alkyl chain at the frequency range from 10 to 105Hz (n=12and18).We also found that the passivated epoxy/SWNTs composite with high dielectric constant presented low dielectric loss. The resulted dielectric performances corresponded to de-bundling of nanotubes and their distribution behavior in the matrix in terms of tail length of alkyl pyrene in the passivation layer.

• 한국IT서비스학회:학술대회논문집
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• 2002.11a
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• pp.7-15
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• 2002

인터넷포탈의 유료화는 인터넷포탈이 가지고 있는 취약한 수익모델을 개선하기 위하여 반드시 달성하여야 할 과제라고 할 수 있다. 인터넷포탈이 서비스를 유료화 하는 과정에서 인터넷포탈의 경쟁환경적 특성에 따라 수익모델을 발전시켜가는 방식으로서 묶음상품을 이용하는 원리와 그 가능성을 검증하고자 하였다. 국내 인터넷포탈은 이미 이용자의 니즈에 부합하는 다양한 형태의 묶음상품을 제공하고 있음을 확인할 수 있었으며, 인터넷포탈의 묶음상품 전략이 인터넷포탈의 경쟁력을 높일 수 있는 강력한 수단 또는 새로운 수익모델을 창출해 나가는 자기발전의 방식으로 활용될 수 있음을 관련문헌에 대한 연구와 국내사례를 통해 살펴보았다.

• Transactions of the Korean Society of Pressure Vessels and Piping
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• v.8 no.2
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• pp.21-25
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• 2012

Functional Equipment Group(FEG) of Nuclear Power Plant(NPP) is the bundling of multiple equipment subcomponents around a major equipment with a common system isolation characteristic or out-of-service consideration. The main purpose of FEG is to reduce out-of-service time to enhance maintenance effectiveness. KHNP(Korea hydro & Nuclear Power Co.) needs to develop these FEGs to successfully perform On-line Maintenance(OLM) which will be expected to institute in the future. Recently, there has been growing interest in OLM in KHNP. The aim of this paper is to suggest the way of FEG development and to build the FEG of MCR(Main Control Room) HVAC(Heat, Ventilation and Air Conditioning) system. The results of this study might be make good use of OLM and be helpful for equipment maintenance for MCR HVAC system.

• The Journal of Information Systems
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• v.17 no.1
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• pp.45-62
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• 2008

The purpose of this research is to investigate success factors and strategics of convergence products in Korea. The research based on existing literature regarding the innovation resistance and product bundling, examines the factors influencing consumer responses to convergence products. The research scheme was experimented through a questionnaire survey answered by 128 companies. The research model was composed of 4 groups: 1) consumer innovativeness, 2) perceived usefulness and ease of use, 3) perceived risk, 4) new product risk The results of this research reveal that consumer evaluation(consumer satisfaction and purchase intentions) are affected by consumer perceptions of risk, perceived usefulness, perceived ease of use, new product risk.

• Journal of the Korean Institute of Educational Facilities
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• v.15 no.3
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• pp.4-16
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• 2008

BTL(Build-Transfer-Lease) Project for Education Facilities is contracted as a package which consists of several education facilities and its maintenance period is 20 years. Thus, total cost variation largely depends on the accuracy of the maintenance cost forecasting in the early stage in the life cycle of the BTL Projects. This research develops a method using complete linkage algorithm and branch & bound algorithm to help in finding optimal bundling combination. The result of this research suggests more reasonable and effective forecasting method for the maintenance bundle in BTL projects.

• 한국정보통신설비학회:학술대회논문집
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• 2008.08a
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• pp.350-354
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• 2008

IP-based mobile communication system is one of the key research items in the mobile networks for a long time. But, due to some technical issues and no need of markets, it is still not full-fledged. Recently, CDMA and WCDMA service providers want to introduce IP-based network connectivity. Even though their efforts, the main network intra-structure depends on ATM or HDLC technology. This article describes a good example of commercialization of IP-based mobile communication systems. Our research is not experimental system but a in-service system - replacing the existing equipments with new IP-based systems. In this paper, we introduce IP related technologies used in our research such as IP-based ATCA(Advanced Telecommunications Computing Architecture) platform, HA(High Availability) redundancy, IP multicast, network redundancy techniques, multi-link bundling and IP header compression. These are already well-known to internet domain. We mix them with mobile communication systems concretely.

• Asia Marketing Journal
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• v.5 no.3
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• pp.60-79
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• 2003

본 연구는 묶음화 판매에 있어서 혼합선도 묶음화, 부가할인 묶음화, 성능 업그레이드 단서 제공 묶음화에 있어서 분할가격의 제시가 제품평가에 어떤 영향을 미치는가를 분석하였다. 이를 위해 첫째, 혼합선도 묶음화에 있어서 분할가격 제시가 효과적인가, 둘째, 부가할인 묶음화에 있어서 분할가격 제시가 효과적인가, 셋째, 혼합선도 부가할인 묶음화에 있어서 분할가격 제시가 효과적인가, 넷째, 분할가격의 대상의 수가 많을수록 제품평가에 긍정적인 영향을 미치는가, 다섯째, 성능 업그레이드 시 추가비용을 분할가격으로 제시하는 것이 제품평가에 긍정적인 영향을 미치는가, 여섯째, 성능 업그레이드의 구성요소의 수를 많게 하여 분할가격으로 제시하는 것이 제품평가에 긍정적인 영향을 미치는가에 관하여 분석하였다. 분석결과 혼합선도 묶음화, 부가할인 묶음화, 혼합선도 부가할인 묶음화에 있어서 모두 묶음화의 구성요소를 통합가격보다는 분할가격 단서로 제공하는 것이 제품평가에 긍정적인 영향을 미치는 것으로 나타났다. 또한 이 경우 모두에서 분할가격 대상의 구성요소의 수를 많게 하면 제품평가가 절하되는 것으로 나타났다. 성능 업그레이드 시 추가비용 단서도 분할가격으로 제시하는 것이 통합가격으로 제시하는 것보다 제품평가에 긍정적으로 영향을 미치는 것으로 나타났다. 그러나 성능 업그레이드의 수를 많이 제시하여 분할가격으로 제시하는 것은 제품평가에 부정적인 영향을 미치는 것으로 나타났다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.6
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• pp.1256-1264
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• 2011

MBS (Multicast Broadcast Service) is defined in WiBro networks for implementing multicast-based services. However, most of the WiBro networks currently used in Korea do not have the MBS functionality and it causes some difficulty in implementing multicast-based services. This paper evaluates the performance of VoIP-based group communication services when implementing using the following two cases: unicast-based and multicast-based group communication systems. The performance evaluation is done using QualNet for each case in terms of the amount of network resource for the service, the delay and delay jitter of packets, and the difference of the delay of members in a group. The simulation result shows that the number of groups and members in a group in a WiBro network is limited because the amount of network resource for the service is increased according to the number of members in a group, and so, the MBS service is required in a WiBro network for a fully-fledged service of VoIP-based group communications. The simulation result also shows that, when a packet bundling is used, the number of groups and members in a group that can be supported in a WiBro network can be increased due to the decrease of the amount of network resource for the service.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.25 no.1B
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• pp.15-30
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• 2000

The important considerations in the design of fiber-optic networks are reliability and survivability preparing against a failure. The SDH(Synchronous Digital Hierarchy), the international standard of optical transmission, offers several network reconfiguration methods that enable network to be automatically restored from failure. One of the methods is the SHR(Self Healing Ring), which is a ring topology system. Most network providers have constructed their backbone networks with SHR architecture since it can provide survivability economically. The network architecture has eventually evolved into a multi-ring network comprised of interconnected rings. This paper addresses multi-ring network design problems is to minimize ring-construction cost. This problem can be formulated with MIP(mixed integer programming) model. However, it is difficult to solve the model within reasonable computing time on a large scale network because the model is NP-complete. Furthermore, in practice we should consider the problem of routing demands on rings to minimize total cost. This routing problem involves multiplex bundling at the intermediate nodes. A family of heuristic algorithms is presented for this problem. These algorithms include gateway selection and routing of inter-ring demands as well as load balancing on single rings. The developed heuristic algorithms are applied to some network provider's regional and long-distance transmission networks. We show an example of ring design and compare it with another ring topology design. Finally, we analysis the effect bundling.

• Food Science of Animal Resources
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• v.37 no.2
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• pp.200-209
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• 2017

The purpose of this study was to evaluate the effects of bundle type (BT) and substitution with spent laying hen (SH) surimi on quality characteristics of imitation crabsticks made from Alaska Pollack (AP) during 6 wk of cold storage. Diagonally bundled samples had poorer gel characteristics and more lipid oxidation when compared with straight bundled ones (p<0.05). The color of diagonally bundled imitation crabsticks deteriorated with storage time (p<0.01). However, BT did not affect sensory characteristics (p>0.05). SH substitution had an effect on most quality characteristics of imitation crabsticks; darker and poorer gel characteristics were observed and its effect on sensory evaluation was seen at the initial storage. Thus, BT and SH substitution can be considered to have a slight effect on eating quality of imitation crabsticks, despite their negative effects on color, gel characteristics, and lipid oxidation.