• Journal of Technology Innovation
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• v.28 no.3
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• pp.29-53
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• 2020

Existing main path analysis is useful to clarify the backbone of technology developments over the past, but has difficulty in identifying future technology candidates, and also in anticipating changes in the mainstream technology. Our method develops a growth velocity indicator, and combines it with key-route analysis and traversal counts measure in the main path analysis. It enables us to identify rapidly growing paths of future technology candidates, and further to evaluate the relative growth potential of such paths by which can replace the mainstream technology in the main path. Our method can contribute to identifying future technology candidates in a quantitative way by using patents, and broaden the scope of main path analysis research toward foresight. It can be useful for technology strategy in practice. Biofuel technology is exemplified.

• Journal of the Korean Society of Food Science and Nutrition
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• v.44 no.1
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• pp.118-127
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• 2015

In this study, chiffon cakes were prepared with wild grape powder. Different amounts of the wild grape powder were tested (3%, 6%, 9%, and 12%) to determine the optimal amount. Rice chiffon cake was evaluated for quality characteristics, antioxidant properties, and sensory evaluation. The specific gravity of control batter was 0.48 g/mL, and it decreased with increasing amounts of wild grape powder, whereas viscosity showed the reverse effect. The pH of batter and cake decreased with increasing amounts of wild grape powder. The moisture content significantly increased with increasing amounts of wild grape powder, and the water activity of cakes was not significantly different between samples from 0.905~0.908. For color, lightness and yellowness deceased with increasing amounts of wild grape powder, whereas redness showed the reverse effect. For texture, hardness, fracturability, gumminess, and chewiness significantly increased with increasing amounts of wild grape powder. Total polyphenol content, DPPH radical scavenging activity, and ABTS radical scavenging activity significantly increased with increasing amounts of wild grape powder. In the sensory evaluation, the control sample showed the highest scores for color, flavor, softness, and overall acceptability. Based on these results, wild grape powder could be considered as a functional material, and 6% wild grape powder is the optimum level for manufacture of rice chiffon cake.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.189-190
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• 2011

현재 변전소에서 일반적으로 사용되는 송변전기기 개폐장치인 GIS(GAS Insulated Switchgear)는 절연확보를 위해 외함 내부에 SF6 GAS가 충진되는 구조이다. SF6 GAS는 지구온난화 규제 물질에 해당하는 가스로 아크 및 부분방전 등에 의해 유독물질로 분해되는 특징이 있어 개폐장치의 내부 절연물로 친환경 매질로의 전환이 절실한 실정이다. 최근 KEPCO는 25.8kV GIS를 대체할 친환경절연 개폐장치를 도입하고 시범 운영중에 있으며, 그 결과에 따라 확대 적용할 방침이다.

• Vending industry
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• v.7 no.1 s.19
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• pp.28-29
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• 2007

도대체 왜 자판기로 쥐포를 구으려고 하는 거지? 쥐포자판기가 등장한다고 했을 때 자판기 업계의 일반적인 반응은 시큰둥한 게 보통이다. 왜냐하면 과거의 부정적인 이미지가 깊게 각인이 되어 있기 때문이다. 쥐포자판기 시장은 2001년에서 2002년에 걸쳐 기획상품으로 집중적인 시장전개가 이루어졌다. 하지만 너무 급조된 제품이 출시된 까닭에 걷잡을 수 없는 품질문제로 시장에서 단명을 하고 말았다. 당시 소비자 반응은 그런대로 괜찮은 편이었어도 취약한 품질문제가 아킬레스건으로 작용했던 것. 그런데 최근 또 쥐포자판기가 등장했다. 경일테크에서 '쥐포닷컴' 쥐포자판기를 개발 상품화하고 본격적인 시장전개를 진행하려 하고 있다. 과거의 부정적 이미지를 경일테크에서 모를 리 없다. 그럼에도 불구하고 자신 있게 시장도전을 하는 데는 그만한 이유가 있다. 자판기를 통해 구은 쥐포의 맛에 있어서나 전체적인 제품경쟁력에 있어 과거에 비할 바가 아니다. 과거의 부정적인 쥐포자판기가 아니라 알짜 사업 아이템으로서의 강점으로 무장을 했다. 이제 자판기를 통해 구을 만하고, 시장에 먹힐 만 하다. 경일 테크가 그 성공을 자신하는 데는 다 이유가 있다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2017.05a
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• pp.739-745
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• 2017

Research of ADN-based monopropellant thruster is progressed by developed countries in Europe to replace toxic hydrazine, and ADN-based monopropellant thruster system is the only system that was proved in space environment. In this research, ADN-based propellant and catalyst was fabricated to develop ADN-based monopropellant thruster, and catalytic combustion performance with fabricated propellant and catalyst were evaluated with DSC-TG analysis. Catalytic combustion of propellant and catalyst was determined with firing test using 5 N scale liquid monopropellant thruster.

• The KIPS Transactions:PartB
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• v.14B no.3 s.113
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• pp.171-182
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• 2007

We propose a simple method for tracking a nonparameterized subject contour in a single video stream with a moving camera and changing background. Then we present a method to eliminate the tracked contour object by replacing with the background scene we get from other frame. First we track the object using LOD (Level-of-Detail) canny edge maps, then we generate background of each image frame and replace the tracked object in a scene by a background image from other frame that is not occluded by the tracked object. Our tracking method is based on level-of-detail (LOD) modified Canny edge maps and graph-based routing operations on the LOD maps. We get more edge pixels along LOD hierarchy. Our accurate tracking is based on reducing effects from irrelevant edges by selecting the stronger edge pixels, thereby relying on the current frame edge pixel as much as possible. The first frame background scene is determined by camera motion, camera movement between two image frames, and other background scenes are computed from the previous background scenes. The computed background scenes are used to eliminate the tracked object from the scene. In order to remove the tracked object, we generate approximated background for the first frame. Background images for subsequent frames are based on the first frame background or previous frame images. This approach is based on computing camera motion. Our experimental results show that our method works nice for moderate camera movement with small object shape changes.

• Journal of Distribution Research
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• v.9 no.1
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• pp.67-92
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• 2004

This study investigates the effects of relationship characteristics on the adoption of online distribution channels in Korea. A questionnaire survey of 81 domestic manufacturing companies revealed that relationship characteristics have no effects on the range of products sold through online channels. In terms of functional usage, manufactures' dependence and their perceptions of middlemen's opportunism were found to affect the extent of adoption of online channels. Overall, these two variables were significantly related to such functions as delivery, refunding, and A/S that have been traditionally considered efficient when implemented by the middlemen. None of the relationship characteristics was found significantly related to the adoption of online channels as a tool of information provision. The authors discuss the theoretical and practical implications of the findings.

• Journal of KIISE:Information Networking
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• v.31 no.2
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• pp.233-241
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• 2004

In this paper, we propose a packet-lossless fast rerouting scheme at a link/node fault in MPLS (Multiprotocol Label Switching) network with minimized accumulated buffer delay problem at ingress node. The proposed scheme uses a predefined, alternative LSP (Label Switched Path) In order to restore user traffic. We propose two restoration approaches. In the first approach, an alternative LSP is initially allocated with more bandwidth than the protected working LSP during the failure recovery phase. After the failure recovery, the excessively allocated bandwidth of the alternative LSP is readjusted to the bandwidth of the working LSP. In the second approach, we reduce the length of protected working LSP by using segment-based restoration. The proposed approaches have merits of (ⅰ) no buffer delay problem after failure recovery at ingress node, and (ⅱ) the smaller required buffer size at the ingress node than the previous approach.

• The Journal of Society for e-Business Studies
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• v.15 no.4
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• pp.303-317
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• 2010

In this paper, we propose a novel approach to fault prediction for real-time business process monitoring method using extended KNN imputation based LOF prediction. Existing rule-based approaches to process monitoring has some limitations like late alarm for fault occurrence or no indicators about real-time progress, since there exist unobserved attributes according to the monitoring phase during process executions. To improve these limitations, we propose an algorithm for LOF prediction by adopting the imputation method to assume unobserved attributes. LOF of ongoing instance is calculated by assuming next probable progresses after the monitoring phase, which is conducted during entire monitoring phases so that we can predict the abnormal termination of the ongoing instance. By visualizing the real-time progress in terms of the probability on abnormal termination, we can provide more proactive operations to opportunities or risks during the real-time monitoring.

• Journal of Korean Society of Transportation
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• v.21 no.3
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• pp.7-14
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• 2003

Statistics shows that 80% of freeway users travel less than 50km, and only 8% of them do over 100km. It means that the freeway is used for commuting. As a result, the freeway is not used efficiently and social cost is high. The current toll system aims for the efficient usage of the freeway by restraining short-distance trips and inducing long-distance ones. Thus, policies such as minimum toll system and discount for long-distance trips have been carried out. However. these two policies take no account of demand management between the freeway and alternative roads. They merely consider the compensation for charge on users, so the assessment of discount rate and distinction of distance are not reasonable. Consequently, not only the effective demand management but also the evaluation of those policies has been difficult to be achieved. The objective of this paper is to analyze those problematic policies and to establish a reasonable and improved toll system. In addition, this study presents the methodology to minimize social cost, which can be achieved by reducing short trips and encouraging long ones on the freeway. A new methodology of freeway toll system is applied and the results are presented.