• International Journal of Railway
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• 제2권1호
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• pp.1-7
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• 2009

The development of structural solutions for high-speed or very high-speed tracks that minimize total life cycle costs of the system is a key issue to improve the operational profitability of new investments. In opposition to conventional ballasted tracks, slab track solutions can be a cost-effective solution, but only in the cases where the benefits due to the increase in track availability and the reduction of track maintenance offsets its much higher construction costs. In the cases where such investment is not feasible, it is worth to evaluate possible structural improvements to ballasted track that allow reducing its maintenance needs without increasing too much its construction costs. This paper evaluates the design requirements and the impact of improving conventional high-speed ballasted tracks by using a bituminous subballast layer. It is divided into two main parts: first the design requirements of the structural solutions with bituminous subballast and its possible benefits on high-speed track deterioration, and secondly the evaluation of the economic impact, in terms of construction costs, of using this structural solution material in future Spanish high-speed lines.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 2001년도 Bulletin of The 5th Asian Design Conference International Symposium on Design Science
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• pp.40.1-40
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• 2001

• Nuclear Engineering and Technology
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• 제53권5호
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• pp.1416-1428
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• 2021

Pebble flow characteristics can be significantly affected by the configuration of pebble bed, especially for HTGR pebble beds. How to achieve a desired uniform flow pattern without stagnation is the top priority for reactor design. Pebbles flows inside some specially designed pebble bed with arc-shaped contraction configurations at the bottom, including both concave-inward and convex-outward shapes are explored based on discrete element method. Flow characteristics including pebble retention, residence-time frequency density, flow uniformity as well as axial velocity are investigated. The results show that the traditionally designed pebble bed with cone-shape bottom is not the most preferred structure with respect to flow pattern for reactor design. By improving the contraction configuration, the flow performance can be significantly enhanced. The flow in the convex-shape configuration featured by uniformity, consistency and less stagnation, is much more desirable for pebble bed design. In contrast, when the shape is from convex-forward to concave-inward, the flow shows more nonuniformity and stagnation in the corner although the average cross-section axial velocity is the largest due to the dominant middle pebbles.

• 디지털융복합연구
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• 제13권11호
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• pp.373-381
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• 2015

중앙정부는 국가균형발전의 중요한 한 축으로 공공기관 지역이전을 추진하였다. 수도권 집중현상의 분산과 지역혁신을 목표로 추진한 공공기관의 지역이전이 완료되는 시점에, 공공기관 이전으로 인한 새로운 지역혁신의 패러다임의 변화와 이전 공공기관이 중심이 되는 지역혁신체계의 변화 방향을 연구의 목적으로 삼았다. 이를 위해서 지역혁신과 지역혁신체계의 기존연구와 현황을 통하여 지역혁신의 성공요소를 발굴하고, 공공기관의 지역이전과 지역혁신과의 관계성 분석을 통하여 새로운지역혁신 패러다임에 고려될 사항과 이전 공공기관이 주체가 되는 지역혁신 체계의 추진방안을 도출하였다. 공공기관이 이전한 후의 지역혁신의 패러다임은 국가적, 세계적 문제를 풀어내고 창의적인 혁신이슈가 포함되어야 하며 이전기관이 혁신의 주체로서 지역혁신을 이끄는 변화가 필요하다. 또한, 지역혁신의 성공요소로 지역중심의 정책입안을 포함한 5가지의 성공요소를 도출하여 제시하였다. 아직은 물리적 이전에 머무르는 공공기관이전의 결실이 지역혁신으로 변화하기 위한 방안을 제시한 것으로 새로운 패러다임과 추진체계를 확보하여 국가의 미래를 견인하는 계기 마련에 도움이 되고 구체적인 혁신체계와 이슈개발 등의 연구가 지속되어 공공기관이전이 지역과 국가 혁신의 중요한 축으로 작용할 수 있는 구체적인 실행이 이루어 져야 할 것이다.

• 과학기술학연구
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• 제2권1호
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• pp.39-61
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• 2002

본 연구에서는 전후 선진국을 중심으로 이루어진 기술혁신정책의 기조변화와 그것을 반영하고 또 선도하는 기술혁신이론의 전환을 살펴보았다. 1980-90년대를 전후해서 등장한 새로운 기술혁신정책의 기조는 사용자 지향성의 강화, 임무지향성에서 경제 사회 지향성으로의 전환, 능력의 향상 등으로 요약될 수 있다. 한편 정책기조의 이와 같은 변화는 혁신체제론을 통해 기술혁신이론에 반영되었다. 상호작용적 학습과 혁신능력을 중심으로 논의를 전개하고 있는 혁신체제론은 이러한 기술혁신정책의 변화를 이론체계 내에 상당부분 수용하였다. 그러나 최근 기술혁신정책에서 강조되고 있는 사회적 측면들은 아직까지 혁신체제론에서 본격적으로 다루어지지 않고 있다. 이 글에서는 향후 혁신체제론의 중요한 연구과제 중의 하나를 '사회'를 이론체계 속에 포괄하는 것으로 파악하고 그러한 작업을 위한 출발점이 될 수 있는 논의를 다루었다.

• 한국의류학회지
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• 제37권5호
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• pp.645-654
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• 2013

This study investigated the difference of reference price, preference and quality perception of high functional underwear according to innovation cues. High functional underwear was selected as a research stimulus due to its technological innovative characteristics. A total of 93 male university students participated as subjects and data were collected by simple random experimental design operationalized with three types of innovation stimulus cues. Two types of internal reference price perception-expected price and fair price, preference, and 9 items of product quality perception-8 functional properties and overall quality of stimulus were measured with a questionnaire. The result supported the difference of reference price and quality perception by product innovation cue. The higher cue level group perceived two types of reference price and the overall quality higher than the lower cue level group. The difference of the expected price and fair price, the influence of functional properties on overall quality, and relations of the variables were discussed in depth.

• 디지털융복합연구
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• 제10권11호
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• pp.673-680
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• 2012

본 연구의 목적은 제품/서비스 개발 과정에 있어서 공급자와 고객이 언제 어떻게 참여해야 하는가는 실증적으로 규명하는 것이다. 이를 통해 이들을 어떻게 그리고 언제 참여시키는 것이 효과적인지에 대한 함의를 제시할 수 있다. 분석결과 높은 고객 참여는 전략설계와 제품/서비스 혁신간의 관계를 조절하는 것으로 나타났다. 이는 제품 개발 초기에 고객이 참여할 경우 혁신성과를 높일 수 있다는 것을 의미한다. 반대로 평가개선 단계에서 고객의 높은 참여는 제품/서비스 혁신에 유의한 영향을 미치지 않는 것으로 나타났다. 이는 평가개선 단계에서는 고객의 아이디어보다는 제품/서비스를 실현할 수 있는 전문지식이 더 요구됨을 나타낸다.

• 한국정보시스템학회지:정보시스템연구
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• 제27권2호
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• pp.53-75
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• 2018

Purpose The purpose of this study is to provide implications by examining the factors affecting the consumers' innovation resistance and intention to use FIDO technology based on the innovation resistance model. In addition, we investigate the difference between FIDO group using biometric authentication technology and those using knowledge / possessive authentication technology. Design/methodology/approach This study investigated the factors influencing innovation resistance and intention to use based on the innovation resistance model. And the structural equation model was applied to analyze the effect of innovation resistance and intention to use. Findings According to empirical results, this study found that perceived relative advantage (+), perceived risk (+), perceived complexity (+), and existing product attitude(+) influenced innovation resistance, and perceived relative advantage (+), self efficacy(+), and innovation resistance(-) influenced intention to use. In addition, this study found that there is a significant difference between the group using the bio-based authentication technology and the group using the knowledge / possessive based authentication technology.

• Asian Journal of Business Environment
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• 제11권1호
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• pp.27-37
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• 2021

Purpose: This article aims to provide a balanced understanding of the structural conditions and social processes involved in the creation and diffusion of innovation. Research design, data and methodology: Drawing on organizational and economic sociology and strategic management literature, this article offers a conceptual framework that highlights the two dimensions of network structures: the vertical dimension focusing on power and legitimacy vs. the horizontal dimension highlighting information value. By organizing the literature on the functions and consequences of network, this paper advances a theoretical perspective in understanding the vast array of empirical studies on innovation involving network analysis. Results: Using the proposed framework, this article explains how the mechanisms of power, legitimacy, and information value work together with social structural factors, thus enriching our understanding of innovation. This study reveals that the information mechanism (horizontal dimension) has been most important in innovation creation and diffusion, and that trust, credibility, and legitimacy are operative in innovation diffusion. Conclusions: This paper contributes to the literature by responding to calls to extend existing frameworks to better account for the dynamics between innovation and network. In addition, this article highlights how conceptualizing innovation within the horizontal-vertical dimensions of network structures, creates new opportunities for future research.

• 아태비즈니스연구
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• 제13권1호
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• pp.75-88
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• 2022

Purpose - This study investigates the effects of going public on the innovation of KOSDAQ firms. Design/methodology/approach - This study uses firms that go public from 2007 to 2011 in Korea. We compare a firm's innovation performance over five years before and after IPO. Findings - We find that firm's innovation declines after an IPO. After going public, both the quality and the quantity of patents are decreased. However, this decrease is alleviated in high-tech industries or concentrated industries where innovation is expected to be more valuable. When comparing firms with venture capital(VC), which are more likely to window dress, to firms without VC, VC backing has no meaningful impact on changes of innovation. Research implications or Originality - As the KOSDAQ market was established to provide small and medium enterprises(SMEs) with funds for firm's investments and growth, it is necessary to verify whether the capital raised at the IPO encourages innovation. Thus, our study contributes to the literature by examining empirically whether an IPO boosts a firm's innovation.