• Proceedings of the Korea Association of Crystal Growth Conference
• /
• 1999.06a
• /
• pp.69-80
• /
• 1999

Computer simulations have played a central role in the development of out understanding of the atomic scale processes involved in crystal growth. The assumptions underlying computer modeling will be discussed and out recent work on modeling of the kinetic formation of thermodynamically unstable phases in alloys or mixtures will be reviewed. Our Monte Carlo computer simulations have reproduced the experimental results on the rapid recrystallization of laser-melted doped silicon. An analytical model for this phenomenon has been developed, and its applicability to other materials will be discussed.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 1996.04a
• /
• pp.842-846
• /
• 1996

Leaf springs are widely used as a major suspension component in many commercial vehicles, such as buses, trucks, etc. They have a complex dynamic behavior due to the geometric nonlinear and the contact mechanism between the leaves. The interface conditions between the leaves play a significant role in the global behavior of the comfort and ride of the vehicle system. The paper concentrates on modeling leaf springs and contact frictions between the leaves using a nonlinear finite element approach. A nonlinear load-displacement hysteresis curve for the leaf spring is simulated and its results are compared with test results.

• Journal of the Korean Crystal Growth and Crystal Technology
• /
• v.9 no.4
• /
• pp.365-370
• /
• 1999

Computer simulations have played a central role in the development of our understanding of the atomic scale processes involved in crystal growth. The assumptions underlying computer modeling will be discussed and our recent work on modeling of the kinetic formation of thermodynamically unstable phases in alloys or mixtures will be reviewed. Our Monte Carlo computer simulations have reproduced the experimental results on the rapid recrystallization of laser-melted doped silicon. An analytical model for this phenomenon has been developed, and its applicability to other materials will be discussed.

• International Journal of Quality Innovation
• /
• v.6 no.2
• /
• pp.17-30
• /
• 2005

The Internet can provide benefits obtained from changing the structure of a business, such as emphasizing the importance of different types of personnel. In addition, the Internet alters the process for business activity, both within and outside the organization. Using structural equation modeling, I empirically test a number of hypothesized relationship based on a sample of 126 Internet Community users. The results are as follows: loyalty is significantly influenced by trust and relationship, repeat purchase is significantly influenced bye-loyalty. In addition, word of mouth is significantly influenced by e-loyalty.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
• /
• 2000.10a
• /
• pp.495-499
• /
• 2000

Auditory system is separated to Outer Ear, Middle Ear and Inner Ear, Middle Ear plays an important role as the sound transfer on amplitude. With analysing of Middle Ear, we can understand disease and compare unformal auditory systems. However, the investigation of mechanical modeling and analysis have been reported in a few paper. In this paper, a three dimensional Eardrum model of human ear was developed and analysed applying the general purpose Finite-Element program (Nastran). Vibration patterns of the eardrum obtained from FEM analysis are in agreements with the experimental results using stroboscope.

• 제어로봇시스템학회:학술대회논문집
• /
• 2001.10a
• /
• pp.59.5-59
• /
• 2001

Multi-agent robot system is the system which executes by cooperating with each robots and controlling several robots. Capability and function of each robot must be considered for cooperation behavior. Furthermore, it is necessary to analyze the given environment and to replace complex task with some simple tasks. Analysis of the given environment and role assignment for the given tasks are composed of discret event. In this paper, the hierarchical controller for multi-agent robot system using the petri-net state diagram is proposed. The proposed modeling method is implemented for soccer robot system. The effectiveness of proposed modeling method is shown through experiment.

• Communications of Mathematical Education
• /
• v.24 no.1
• /
• pp.49-65
• /
• 2010

The purpose of this study is to encourage the role of domain to consider the teaching of the concept of functions in modeling real situations. To do this, it is analyzed that how to introduce the concept of functions and linear functions in textbooks treated in the 1st grade and the 2nd grade of middle school. This study also reviewed the role of domain in representational activities for modeling real situations using linear functions. In these reviews, it found that many textbooks do not consider the domain in the equations of functions and these graphs and several text books used linear functions for modeling real situations which are not represented by linear functions contextually. It is concluded that the domain of function is an important concept that will be considered any representational activities for functions.

• Journal of the Korean Society of Food Culture
• /
• v.24 no.6
• /
• pp.739-748
• /
• 2009

The aim of this study was to better understand the factors of the mentoring function in the foodservice industry that improve the organizational commitment of subordinates, and to asses the roles that trust towards supervisors play in the relationship between the mentoring and organizational commitment. A survey was of subordinates who were conducting the mentoring in foodservice companies (hotels, family restaurants) located in Seoul and Gyeonggi area was conducted from May 1 to May 30, 2008. The questionnaires were distributed to 400 employees in 50 restaurants and, 341 of them were received and a total of 320 were finally analyzed. The results were as follows. First, the effect of mentoring functions on the organizational commitment of subordinates indicated that the career developing function and psychosocial function had a significant positive effect on the emotional commitment and normative commitment (p<.01), and the career developing function, psychosocial function and role modeling function had a significant positive effect on the enduring commitment (p<.01). Second, the mediating roles of supervisory trust in the relationship between mentoring functions and organizational commitment of subordinates indicated that supervisory trust mediated the relationship between the career developing function of the mentoring functions, and enduring commitment and normative commitment in addition, it met the mediating requirements in terms of the relationship between the role modeling function, and the emotional commitment, enduring commitment and normative commitment. Consequently, the high career developing function, psychosocial function and role modeling function in mentoring raised the level of organizational commitment;thus, the mentoring system should used as on of the mentoring functions in the foodservice industry and mentoring functions should be also established.

• Journal of Information Technology Services
• /
• v.10 no.4
• /
• pp.47-65
• /
• 2011

Business organizations are asked to create new business models utilizing current technological innovations such as ubiquitous computing technology for developing new domains of business to obtain a competitive advantage and achieve a sustainable development. This study was focused on the processes for developing new and practical business models. The purpose of this study was to propose ubiquitous sport business modeling processes from the modeling framework. In particular, this study focused on developing new, pragmatic, and effective sport business models, and this new type of business is defined as 'u-sport.' For design the business model, extensive literature reviews and case studies were conducted for benchmarking the cases and expert group review was conducted for developing u-sport business model framework. The suggested business modeling processes in this study were consisted of four phases; 1) organization strategy level setting phase, 2) business strategy level setting phase, 3) business structure level setting phase, and 4) service level setting phase. The modeling processes were verified to adapt ubiquitous sport business. This designing and modeling process is expected to play a significant role on enhancing the technology-based business environments as the process mainly focuses on the service and consumer oriented approach rather than technology and suppliers oriented approach. In conclusion, establishing sport business models by adapting the service modeling process will deliver an exponential growth and development of future ubiquitous based industry.

• Journal of the Korea Society for Simulation
• /
• v.29 no.2
• /
• pp.35-47
• /
• 2020

Immediate and serious attention on CGF(computer generated forces) behavior modeling for defense M&S (modeling & simulation) is required in response to the reduction in the number of troops and development of 4^th industrial technologies. It is crucial for both military person and engineer to understand such technologies. The research aims to provide guidelines for establishment of research direction on CGF behavior modeling. We investigate traditional and/or novel methodologies such as rule-based, agent-based, and learning-based method. Discussions on future direction of applicable area and strategies are followed. We expect that the research plays a key role for understanding CGF behavior modeling.