• 한국콘텐츠학회논문지
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• 제11권6호
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• pp.90-97
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• 2011

최근 통신 기술과 인터넷의 발달로 인해 현대인들의 활동영역이 사이버 공간으로 넓어지면서 사이버공간에서의 자아 정체성과 윤리 문제가 중요하게 부각되고 있다. 이러한 시점에서 가상공간에서의 환몽 체험을 통해서 진정한 자아를 탐색하는 과정을 담은 우리 고전 소설 구운몽 은 현대 네티즌들에게 의미있는 시사점이 될 수 있다. "구운몽"의 주인공인 성진은 환생을 통해서 또다른 욕망의 주체인 팔선녀와 만남으로써 가상 세계를 체험하고 있다. 이를 통해 성진은 '진/가'의 이원적인 세계관을 극복하고 진정한 구도자로서의 자아를 확립하기에 이른다. "구운몽"의 환몽 체험은 현실 세계와 가상 세계를 구별하면서, 성진에게 양소유라는 새로운 자아를 부여한다. 성진은 아바타인 양소유를 통해서 자아의 한계를 초월하여 다중적인 주체로서 자신을 자리매김한다. 이러한 주체의 확장을 통해 결국 성진은 현실과 가상이 모두 깨달음을 위한 주체의 통합 과정임을 인식하게 된다. 이렇듯, "구운몽"은 컴퓨터와 같은 물리적인 매개로서가 아니라 인간의 정신으로 구성되는 가상 체험, 가상 세계를 이야기하고 있는 작품으로 이해된다. 현실 세계와 가상 세계의 대립, 충돌과 욕망의 무한성 속에서 갈등하는 현대 네티즌들에게 자아에 관한 성진의 깨달음은 모순적인 상황을 해결할 수 있는 열쇠가 될 수 있을 것이다.

• 한국공작기계학회논문집
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• 제13권3호
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• pp.91-97
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• 2004

The door closer is a typical system which consists of spring and damper. The door closer is a device to close the door more slowly. The virtual prototypes of cylinder-type door closer are developed. The simulations of virtual prototype are performed to obtain the load history of the guide pin. The structural strength assessment of the guide pin is performed to verify a design safety. The fatigue life and damage of the guide pin are predicted using a FEMFAT 4.3h based on the finite element analysis.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2005년도 추계학술대회논문집
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• pp.143-146
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• 2005

In modern automotive control modules, mechanical failures of surface mounted electronic components such as microprocessors, crystals, capacitors, transformers, inductors, and ball grid array packages, etc., are mai or roadblocks to design cycle time and product reliability. This paper presents a general methodology of failure analysis and fatigue prediction of these electronic components under automotive vibration environments. Mechanical performance of these packages is studied through finite element modeling approach fur given vibration environments in automotive application. Using the results of vibration simulation, fatigue lift is predicted based on cumulative damage analysis and material durability information. Detailed model of solder/lead joints is built to correlate the system level model and obtain solder strains/stresses. The primary focus in this paper is on surface-mount interconnect fatigue failures and the critical component selected for this analysis is 80 pin plastic leaded microprocessor.

• Bulletin of the Korean Chemical Society
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• 제28권6호
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• pp.947-952
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• 2007

Mycobacterium tuberculosis is a pathogen responsible for 2-3 million deaths every year worldwide. The emergence of drug-resistant and multidrug-resistant tuberculosis has increased the need to identify new antituberculosis targets. Acetohydroxy acid synthase, (AHAS, EC 2.2.1.6), an enzyme involved in branched-chain amino acid synthesis, has recently been identified as a potential anti-tuberculosis target. To assist in the search for new inhibitors and “receptor-based” design of effective inhibitors of tubercular AHAS (TbAHAS), we constructed four different structural models of TbAHAS and used one of the models as a target for virtual screening of potential inhibitors. The quality of each model was assessed stereochemically by PROCHECK and found to be reliable. Up to 89% of the amino acid residues in the structural models were located in the most favored regions of the Ramachandran plot, which indicates that the conformation of each residue in the models is good. In the models, residues at the herbicide-binding site were highly conserved across 39 AHAS sequences. The binding mode of TbAHAS with a sulfonylurea herbicide was characterized by 32 hydrophobic interactions, the majority of which were contributed by residue Trp516. The model based on the highest resolution X-ray structure of yeast AHAS was used as the target for virtual screening of a chemical database containing 8300 molecules with a heterocyclic ring. We developed a short list of molecules that were predicted to bind with high scores to TbAHAS in a conformation similar to that of sulfonylurea derivatives. Five sulfonylurea herbicides that were calculated to efficiently bind TbAHAS were experimentally verified and found to inhibit enzyme activity at micromolar concentrations. The data suggest that this time-saving and costeffective computational approach can be used to discover new TbAHAS inhibitors. The list of chemicals studied in this work is supplied to facilitate independent experimental verification of the computational approach.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제5권4호
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• pp.302-309
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• 2005

We have studied a model and application that evolves the behavioral knowledge of a virtual robot. The knowledge is represented in classification rules and a neural network, and is learned by a genetic algorithm. The model consists of a virtual robot with behavior knowledge, an environment that it moves in, and an evolution performer that includes a genetic algorithm. We have also applied our model to an environment where the robots gather food into a nest. When comparing our model with the conventional method on various test cases, our model showed superior overall learning.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2000년도 춘계학술대회 학술발표 논문집
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• pp.283-287
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• 2000

The Internet is becoming an abstract system from which we can get every kind of project and to which we can entrust every kind of project. That is, Internet can be considered both as an infinite scale of task pool and infinite scale of TM (Task Module) pool, which surely provides the necessary and sufficient condition for dwelling of the virtual life. n we could build up the proper ecosystem composed of the virtual life, It would be possible to implement the system as a life. The life system thus obtained provides us some decisive advantages, which is not available by the reduction paradigm. In this Paper, we presented an ecosystem based on Internet which will be followed by the discussion of its meaning in terms of usefulness.

• Bulletin of the Korean Chemical Society
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• 제31권5호
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• pp.1407-1410
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• 2010

• Journal of Information Processing Systems
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• 제13권4호
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• pp.876-892
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• 2017

A virtual reality is a virtual space constructed by a computer that provides users the opportunity to indirectly experience a situation they have not experienced in real life through the realization of information for virtual environments. Various studies have been conducted to realize virtual reality, in which the user interface is a major factor in maximizing the sense of immersion and usability. However, most existing methods have disadvantages, such as costliness or being limited to the physical activity of the user due to the use of special devices attached to the user's body. This paper proposes a new type of interface that enables the user to apply their intentions and actions to the virtual space directly without special devices, and test content is introduced using the new system. Users can interact with the virtual space by throwing an object in the space; to do this, moving object detectors are produced using infrared sensors. In addition, the users can control the virtual space with their own postures. The method can heighten interest and concentration, increasing the sense of reality and immersion and maximizing user's physical experiences.

• 한국주조공학회지
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• 제30권5호
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• pp.196-200
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• 2010

The structural stress and fatigue behavior of tensile specimen containing internal shrinkage defect were modeled. Real shrinkage defect in casting was scanned by industrial CT (computed tomography), and subsequently its shape was simplified by ellipsoidal primitives for the structural analysis (S.S.M., shape simplification method). The analysis results were compared with the results by real shrinkage shape without any simplification process. It was possible to consider real shrinkage of casting in stress analysis and the method to predict fatigue life of casting with defect was proposed.

• 한국컴퓨터정보학회논문지
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• 제21권3호
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• pp.97-104
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• 2016

In this paper, we propose spatial information based simulator for user experience optimization and minimize real space complexity. We focus on developing simulator how to design virtual space model and to implement virtual character using real space data. Especially, we use expanded events-driven inference model for SVM based on machine learning. Our simulator is capable of feature selection by k-fold cross validation method for optimization of data learning. This strategy efficiently throughput of executing inference of user behavior feature by virtual space model. Thus, we aim to develop the user experience optimization system for people to facilitate mapping as the first step toward to daily life data inference. Methodologically, we focus on user behavior and space modeling for implement virtual space.