• Journal of Korea Game Society
• /
• v.21 no.2
• /
• pp.123-138
• /
• 2021

This study aims to empirically prove that blockchain games can provide business model innovations through interoperability among NFT based game items. Through our research on 'PlayDapp platform', we figured out that the technological innovation of blockchain games not only has provided a positive influence to the socio-economic and industrial ecosystem perspectives, but also it differentiates companies(game developers and platform providers in this eco-system) and increases customer benefits.

• Proceedings of the Mineralogical Society of Korea Conference
• /
• 2001.06a
• /
• pp.44-44
• /
• 2001

구리(II)의 전자상자성공명 흉수선의 모양과 선 폭에 대한 해석을 통해 석영-물 계면에서의 구리(II) 및 흡착수와 석영 표면과의 상호 작용에 대해 연구하였다. 두 가지 흡수선이 중첩하여 흡수선을 구성하며 따라서 석영 표면에 적어도 두 종류의 구리(II)가 존재함을 알 수 있었다. 하나는 g=2.18에 중심을 둔 초미세 갈라짐이 분해되지 않는 등방성 단일 흡수선을 보여 주는 구리(II) 이온이다. 이는 수용액 중에서와 유사한 빠른 자유 회전 운동이 가능한 상태로 표면에 매우 약하게 결합된 구리 이온(Cu($H_2O$)$_{6}$$^{2+}$)인 것으로 해석된다. 다른 하나는 축 대칭 흡수선 $g_{∥}$=2.40, $g_{⊥}$=2.08)을 가지는 구리(II)로서 이는 표면에 강하게 결합된 것으로 해석된다. 본 결과는 흡착 현상에 대한 열역학적 접근법인 표면 착물화 모델들이 제시하는 광물 표면에서의 금속 이온 흡착 모델이 거시적 관점에서 흡착 현상을 잘 모사할지라도 분자 수준의 미시적 관점에서 흡착 메커니즘을 규명하기 위해서는 독립적인 분광학적 정보가 제시되어야함을 보여 준다.다.

• Proceedings of the Computational Structural Engineering Institute Conference
• /
• 2011.04a
• /
• pp.265-268
• /
• 2011

하중 속도에 따른 콘크리트 재료의 역학적 특성은 구조물의 동적파괴거동에 영향을 미친다. 본 연구는, rigid-body-spring network를 이용하여 파괴해석을 수행하고, 거시적 시뮬레이션에서 속도효과를 표현하기 위하여 점소성 파괴모델을 적용하였다. 보정을 위해서 Perzyna 구성관계식의 점소성 계수들이 다양한 하중속도에 따른 직접인장실험을 통해서 결정되었다. 동정상승계수를 이용하여 하중 속도가 증가함에 따른 강도 증가를 표현하였고 이를 실험결과와 비교하였다. 다음으로 느린 하중속도와 빠른 하중속도에 따라 단순 콘크리트 보와 철근 콘크리트 보에 대한 휨 실험을 수행하였으며, 하중 속도에 따라서 서로 다른 균열 패턴을 관찰할 수 있었다. 빠른 하중은 보의 파괴가 국부적으로 나타나게 만드는데, 이는 속도 의존적 재료의 특성 때문이다. 구조적인 측면에서, 보강재는 느린 하중속도에서 균열의 크기를 줄이고 연성을 높이는 데 큰 영향을 미친다. 본 논문은 속도 의존적 거동에 대한 이해와 동적하중에 대한 보강효과를 제시한다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2012.07a
• /
• pp.207-208
• /
• 2012

본 연구는 청소년의 인터넷 중독에 대한 문제를 이해하기 위한 새로운 접근방법을 소개하고 있다. 기존 연구의 대부분은 인터넷과 온라인 게임 자체에 집중하여 청소년의 행동을 조절하기 위한 제도적, 기술적 방법을 소개하였다. 이러한 접근방법은 본질적인 청소년 사이버 문화에 대한 이해가 결여되어 단기적인 성과는 거둘 수 있지만 장기적이고 거시적인 관점에서 문제를 해소하기에는 제한적이다. 본 연구에서는 청소년의 정체성 성립과정과 자극과 반응 모델, 관계질서 모델 등을 통하여 본질적인 인터넷 중독 해소를 위한 접근방법을 제안하고자 한다. 본 연구의 결과물은 향후 지속될 실증적 연구에 토대가 될 것이며 청소년의 인터넷 중독 예방 활동을 위한 자료로 활용될 수 있을 것이다.

• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.37 no.9
• /
• pp.916-922
• /
• 2009

Because thermal design of satellite carrying out mission in space is performed by thermal analysis result using thermal mathematical model, accuracy of thermal mathematical model is important and it can be improved by model correlation. Correlation steps of satellite thermal math model are composed of modeling of satellite configuration placed in thermal vacuum chamber, verification of correspondence between thermal math model and real satellite configuration, and adjustment of modeling parameters from major part to minor part etc. In this study, correlation success criteria was established and correlation for satellite thermal math model was performed using result of thermal vacuum test of satellite structure-thermal model to meet the success criteria. The overall results satisfied the criteria and this correlated thermal model was applied for detailed thermal design of satellite.

• Transactions of the Korean Society of Mechanical Engineers B
• /
• v.34 no.6
• /
• pp.569-577
• /
• 2010

A multiscale particle simulation technique that can be applied to a multiphase fluid system has been developed. In the boundary region where the macroscopic- and microscopic-scale models overlap each other, three distinctive features are introduced in the simulation. First, a wall is set up between the gas and liquid phases to separate them and match the phases respectively to the macroscopic conditions stably. Secondly, the interfacial profile is obtained near the matching region and the wall translates and rotates to accommodate the change in the liquid-vapor interfacial position in the molecular model. The contact angle thus obtained can be sent to the macroscopic model. Finally, a state of mass and temperature in the region is maintained by inserting and deleting the particles. Good matching results are observed in the cases of the complete and partial wetting fluid systems.

• Convergence Security Journal
• /
• v.14 no.5
• /
• pp.37-47
• /
• 2014

A Trojan malicious code is one of largest malicious codes and has been known as a virus that causes damage to a system as itself. However, it has been changed as a type that picks user information out stealthily through a backdoor method, and worms or viruses, which represent a characteristic of the Trojan malicious code, have recently been increased. Although several modeling methods for analyzing the diffusion characteristics of worms have proposed, it allows a macroscopic analysis only and shows limitations in estimating specific viruses and malicious codes. Thus, in this study an ESP model that can estimate future occurrences of Trojan malicious codes using the previous Trojan data is proposed. It is verified that the estimated value obtained using the proposed model is similar to the existing actual frequency in causes of the comparison between the obtained value and the result obtained by the Markov chain.

• Korean Journal of Social Welfare Studies
• /
• v.41 no.1
• /
• pp.39-63
• /
• 2010

This research is to make the identity of the two models clear by reviewing the similarities and differences between Social Model of Disability from U.K. and Independent Living Model from United States. Research results are as follows. As for differences, Social Model of disability intended to change disability paradigm by focusing society itself as the cause of disability rather than individuals, however Independent Living Model stressed on the freedom and control through disabled people's life with self-advocacy group and personal assistants. As for similarities, there are self-representatives, social responsibility for disability, alienation of people with intellectual disabilities at the initial stage, background in legislating Disability Discrimination Acts in both countries. This result has its significances because it shows theoretical framework which make it possible to review further how disability practice and movements understand the two models regardless of their real contents and how the two affected the induction and proceeding of Korean Discrimination Act and Independent Living Paradigm in the Disability Welfare Act.

• Journal of Digital Contents Society
• /
• v.8 no.1
• /
• pp.61-68
• /
• 2007

In order to expand e-Learning and to increase effect of e-Learning, e-learning should be improved more and more. It is achived when reflecting learning planning, teaching method design, well-designed operation, etc. The quality of e-Learning can be influenced by the development method and operational method, and the quality of e-learning can decide teaming effect. That is, the development method(model) of contents influence contents quality, and contents quality decides learning effect. Therefore, this study, analyzing e-Learning models and introducing "Knowledge-based e-Learning Model" which can increase quality of e-Learning, should contibute to achieve e-Learning purpose.

• Journal of the Korea Society for Simulation
• /
• v.25 no.4
• /
• pp.13-20
• /
• 2016

Microsimulation model has aimed to simulate the impact of policy at the level of individual and household. Recently, microsimulation model has been widely accepted in OECD countries for evaluating their economic and social policies. For improving the availability of microsimulation model, the population data which shows good accordance with the official statistics should be required. In this paper, we generate Korean synthetic populations by using the iterative proportional updating method. For the validation of Korean synthetic populations, we compute the difference between the generated synthetic populations and the summary table of Korean census. Then, we confirm that it shows good accordance with the summary table.