• Informatization Policy
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• v.20 no.4
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• pp.71-88
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• 2013

Probability of technology risk is expected to increase as the post catch-up innovation, characterized by high uncertainty and high risk, would dominate in the coming era of post catchup. Social controversy on online game as a post catch-up innovation is still ongoing, though the shutdown law was enacted by the government. Socio-technical vulnerability causing technology risk paradoxically arose from the world top-level ICT infrastructures and has been reinforced by developmentalism. While both the pros and cons of the regulation fail to recognize dilemma objectively, social cost is brought about and accumulated. With recognizing dilemma between technology innovation and risks, we can tackle technology risks and ensure responsible innovation in post catch-up era.

• Journal of the Korean Geosynthetics Society
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• v.14 no.1
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• pp.33-41
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• 2015

In this study, laboratory tests (flow, unit weight, unconfined compressive strength and bleeding tests) were performed to evaluate engineering properties of treated soil to improve pipe mixing method. As result, flow and bleeding properties are proportional to the water contents. The unit weight and unconfined compressive strength is decreased as the water contents increased. Comparing equipments contact pressure with bearing capacity of the mixed soil for dozer, backhoe and belt conveyor are immediately appliable. The applicable water content range is estimated from 80% to 200% by pipe mixing method using cement. Also, The design chart is developed from the results.

• Journal of Korea Multimedia Society
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• v.9 no.10
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• pp.1361-1370
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• 2006

Recently fast innovation of Internet technology causes lot of application to change into web application and requirement for the inter-operable communication among various systems are increased rapidly. These trends are part of changes which is caused by ubiquitous world and it is just beginning of huge waves that is required to fit and change under the ubiquitous environments. This thesis is focused on the Design and Implementation of Layer Structured Components which can be interfaced effectively for the Material Management System under the Heterogeneous Client Server Environments. The key points to do that kinds of affairs are using XML web services that can communicate thru systems and also using independent layered components for the enforcement of reusability and inter-operability. For the various type of testing of implementation, we used RFID System, PDA, Desktop Systems and confirmed the normal operation without concerning the type of client system and platforms. The Components proposed in this thesis could be reused effectively in case of developing similar applications.

• Composites Research
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• v.33 no.1
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• pp.13-18
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• 2020

Recently, the fire rescue truck in problem proceed research it for the fast works action and for pass the small road. So we were research for weight reduction. In this study, the (NO. 5) fifth boom of the fire rescue truck have 288 mm(W) × 299 mm(D) × 3,691 mm(L) with a maximum load of 876 kg and the thickness of 3 mm of the Steel Boom. This changing of Steel (STRENX960) to CFRP was weave Carbon Fiber NCF (±45°, 2axis) and then it make the NCF Prepreg. This process was designed based on structural analysis, the effects of NCF Prepreg (±45°) on torsion were identified, and the optimal design was made with Stacking Pattern (b). Stack patterns were optimized for levels equal or higher than existing Steel Boom and CFRP Boom stacked in the UD direction, and finally, the lightening effect on weight of approximately 49.6% of the steel was identified.

• Tunnel and Underground Space
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• v.14 no.3
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• pp.188-202
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• 2004

If an underground research facility for the validation of disposal concept is constructed in KAERI, it is expected to have a thick weathered zone and varying surface topology. In this study, the influence of different geological conditions, tunnel slope, tunnel size, and sequential excavation is investigated by 3D mechanical analysis using FLAC3D. Around the tunnel, it is not expected to develop any plastic zone and the maximum stress might be as high as 5 ㎫. The maximum compressive stress will be developed at about 20 m to e dead end of the tunnel. There is no difference on stress and displacement distributions between the cases with and without sequential excavation. It is expected to have stress release in the roof and floor after the excavation of the tunnel. There is no significant influence of weathered zone size, tunnel size, and tunnel slope on the stress and displacement distributions. The modeling for the intersection shows the minimum factor of safety is above 3, when the in situ stress ratio K is 3. From the study, it was possible to demonstrate that the small scale disposal research tunnel in KAERI will be mechanically stable.

• Journal of the Korea Society of Computer and Information
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• v.13 no.4
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• pp.241-253
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• 2008

UCC(User Created Content) has brought about much change in the way Internet users produce, publish, and share digital content. That means that Internet users are participating in the UCC service much mure voluntarily, and interacting each other mure proactively to meet their social-psychological needs such as self-expression, social presence and so on. Also, there has been the sharp increase in variety and volume of digital content on Internet. The reasons why are that UCC enables Internet users to produce and publish their own content with much low cost, and lowers the entrance barriers to the digital content market. Like this, UCC causes the unbundling of the value chain of digital content, resulting in the high uncertainty and complexity, and then leading to the low healthiness of UCC value chain in terms of productivity, robustness, niche creation, and safety. Thus, this paper is to identify the status and problems of UCC value chain and present the way how to enhance the healthiness of UCC value chain more comprehensively and systematically.

• Korea journal of population studies
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• v.30 no.1
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• pp.149-176
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• 2007

본 연구는 지난 30년간(1975-2004년) 한국의 경제성장과정에서 교육의 부문별(초등 중등 고등교육) 역할을 추정하는 데 주목적이 있다. 본 연구는 우선 신고전학파 Solow의 외생적 경제성장이론을 접목한 Cobb-Douglas 모형을 확장하여 1인당 경제성장 추정을 위한 내생성장모형을 제시하였다. 또한 자료 한계를 극복하기 위하여 동아시아 7개국 자료를 바탕으로 시계 및 횡단면 자료를 블록으로 구축하여 앞의 내생성장모형을 이용한 pooling방법으로 1인당 경제성장에 물적자본, 단순노동력, 인적자본, 지적자본(R&D), 초기년도의 기술수준 등의 기여분을 추정하였다. 이러한 각 생산요소의 직접적인 추정결과로부터 각 요소간(고등교육, 중등교육, 지적자본) 상호작용으로 인한 간접적인 기여분 추정을 위해 연립방정식체계를 구축하고 각 요소의 영향력을 재 추정하여 보정된 결과를 제시하였다. 1975-2004년간 한국의 경제성장 과정에 있어서 인적자본요소인 교육은 40.7%를 기여였으며 이를 다시 분해하면 중등교육이 가장 큰 87.0%, 초등교육이 6.6%, 중등교육에 간접적으로 기여한 대학교육이 -52.9%를 보였다. 물적자본이 39.6%, R&D자본이 24.1%들 보였으며 지식 정보기반사회에서 그 의미가 감소한 단순노동력은 -1.4%, 기술추격을 가능케 하는 1975년도 초기기술수준이 -3.0%의 추정결과를 보여주고 있다. 향후 정책연구 과제로는 한국미 지식기반사회에서 선진국으로 진입하기 위해서는 경제성장과정에서 대학의 역할을 제고할 필요성이 있음을 제안하고 있다. 이를 위해서는 기존 대학의 양적인 구조조정이 필요하다. 특히 대학의 질적 경쟁력을 높이기 위한 정부의 대학 지원 역할 역시 제고되어야 할 것이다. 또한 이 글은 교육시장과 노동시장을 어떠한 방법으로 연계 시키는가를 논의하고 세계시장의 급격한 기술변화와 체제변화에 따라 국내노동시장의 필요한 산업인력수요의 내용도 같은 속도의 변화를 요구하고 있음을 상기시키고 연계지원 정책을 주장하고 있다.

• The Journal of the Korea Contents Association
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• v.18 no.1
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• pp.55-63
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• 2018

This study aims to analyze remediation of games and fictions in Korean virtual reality game fictions and to derive the storytelling of virtual reality game fictions through them. The purpose of this study is to explore the possibilities that Korean game fiction based on the web can be expanded as popular literature. The main character of the fiction is a male in his twenties. In the neoliberal society, he is set as a member of the neglected class and lacking privilege. He enters the virtual world because of the deficiency experienced in the real world. It minimizes the mediation process between the real world and the interface. On the other hand, the repetitive actions performed by the protagonist belong to the category of self - destructive labor. As a result, he shows signs of narcissism. In the Korean virtual reality game fiction, the magic circle appears blurred, and the real world and the virtual world are linked. In this process, the virtual world functions as a substitute space to solve the problem of reality. The establishment of such a space, and the resolution of conflicts are merely narrative characteristics of Korean game fictions that are different from North America and Europe.

• Journal of the Korean Society of Propulsion Engineers
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• v.9 no.3
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• pp.133-144
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• 2005

Enhancements to propellants provide an opportunity to either increase performance of an existing launch vehicle. One of the promising technologies is the use of densified cryogenic propellants such as liquid hydrogen and liquid oxygen. The main advantage of densified cryogenic propellants is the increase in propellant mass fraction. Increased propellant mass fraction means increased payload mass to orbit. This paper reviews the basic principles and current technology trends for cryogenic propellant densification technologies. Several promising densification methods are presented focused on liquid oxygen densification. Engine and vehicle performance analyses are also presented to quantify the potential performance benefits of densified propellants in an overall system. And suggestions of application scheme for satellite launch vehicle is made.

• Korean Journal of Construction Engineering and Management
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• v.7 no.5
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• pp.53-63
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• 2006

Since 2005, the government began to introduce and promote a new project delivery system, BTL(Build, Transfer, and Lease), in order to provide high level of public services for the upgraded quality of life and to boost the domestic and local construction economy. However, the lack of experiences in the new system by the constituents from diverse economic sectors brought a number of drawbacks from each constituent's perspective such as improperly low earning rate, excessive expenses for preparation of the project proposal, imbalanced regulations, heavy cost and procedures to establish SPC, the ineffective structure of the consortium, the short-term oriented evaluation criteria for the selection and so forth. These drawbacks turned out to be obstacles for the successful BTL projects. Hence, this paper analyzes the above issues and conducts the interviews with the professionals from the diverse sectors in order to propose the changes to resolve those for the improvement and finally to deliver the successful BTL projects for the diverse public owners.