• 동력기계공학회지
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• 제22권6호
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• pp.80-86
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• 2018

A damper is a hydraulic device designed to absorb or eliminate shock impulses which is acting on the sprung mass of car body. It converts the kinetic energy of the shock into another form of energy, typically heat. The main mechanism for providing damping is by shearing the hydraulic fluid as it flows through restrictions. Since the damping mechanism depends on the flow restrictions, these restrictions are very important in damper design. Damper engineers often try several combinations of valve shims, piston orifices and bleed orifices before finding the best combination for a particular setup on a car. Therefore, the ability to tune a damper properly without testing is of great interest in damper design. For this reason, many previous researches have been done on modeling and simulation of the damper. This paper explains a genetic algorithm method to find the optimal parameters for the design objective and the simulation results agree well with the targeted damping characteristics.

• 유통과학연구
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• 제4권1호
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• pp.121-140
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• 2006

재래시장 및 지방소매상인은 매출감소의 원인을 경기부진과 더불어 대형유통점의 확산에 있다고 인식하고 있는 상황과 정부 내에서 대형유통점에 대한 규제완화 방침을 정한 바 있어 이와 다른 규제강화를 논의하기 어려운 상황이다. 따라서 이러한 배타적이고, 이기적인 상황을 정부는 출점 규제를 우선시하는 하향식 규제보다는 상향식 규제를 통하여 유통산업의 효율성과 유용성의 적절히 조화를 이룰 수 있어야 하며 본 연구의 문제점으로는 첫째, 재래시장 몰락과 점포 과포화 논란 둘째, 무분별한 규제정책 남발 우려 셋째, 대형유통업체 독과점화 폐해 넷째, 체계적인 발전진흥정책 미흡 등을 들었다. 효율성 제고방안으로는 첫째, 재래시장 전문화 육성정책수립 둘째, 독과점화 폐해규제를 위한 노력 셋째, 대형 및 중소업체 상생위한 이원화전략 넷째, 공동 판촉 및 교육 등 시행 등을 제시하였다.

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 1998년도 The 12th Asia Quality Management Symposium* Total Quality Management for Restoring Competitiveness
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• pp.239-250
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• 1998

A method of finding optimal linear restriction on regression parameters in linear model for mixture experiments in the sense of minimizing integrated mean squared error is studied. We use the formulation of optimal restrictions on regression parameters for estimating responses proposed by Park(1981) by transforming mixture components to mathematically independent variables.

• Journal of the Korean Statistical Society
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• 제28권3호
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• pp.325-336
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• 1999

Collinearity among independent variables can have severe effects on the precision of response estimation for some region of interest in the experiments with mixture. A method of finding optimal linear restriction on regression parameter in linear model for mixture experiments in the sense of minimizing integrated mean squared error is studied. We use the formulation of optimal restrictions on regression parameters for estimating responses proposed by Park(1981) by transforming mixture components to mathematically independent variables.

• 대한수학회지
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• 제46권3호
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• pp.475-491
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• 2009

In [2], we identified the group of units of finite local rings $\mathbb{Z}_4[X]$/($X^k+2X^a$, $2X^r$) with certain restrictions on a. In this paper we find direct sum decomposition of the group of units of such rings without restrictions on a into cyclic subgroups by finding their generators. And further generalization is considered.

• 건설안전기술
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• 통권50호
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• pp.71-79
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• 2009

Construction companies economic to lighten the restrictions on safety education and training due to the domestic recession as long as the global downturn. With this, the Korean government restrictions, but the incidents are being sharply increased nowadays. The construction industry hazardous than any others, so, they insist to reinforce the training for incidents prevention, to be disregarded at the subcontractors of the bigger construction companies problems. According to these matters, this study hereby surveyed regarding their suggestions for the improvements of the training concepts through questionnaires below.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(3)
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• pp.29-32
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• 2002

This paper suggest target detection algorithm for mobile robot control using color and shape recognition. In many cases, ultrasonic sensor(USS) is used in mobile robot system to measure the distance between obstacles. But with only USS, it may have many restrictions. So we attached CCD camera to mobile robot to overcome its restrictions. If visual information is given to robot system then robot system will be able to accomplish more complex mission successfully. With acquired vision data, robot looks for target by color and recognize its shape.

• 한국CDE학회지
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• 제22권2호
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• pp.6-10
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• 2016

This paper presents the kinematics of a walking robot leg based on Jansen mechanism. By using simple mathematics, all trajectories of walking robot leg links can be calculated. A foot point trajectory is used to evaluate the performance of a walking robot leg. Trial and Error method is used to find a best combination of link lengths under certain restrictions. All simulations are performed by Matlab. Ground score, drag score, step size, foot lift, instant speed, and average speed of foot point trajectories are used for selecting the best one.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2010년 춘계학술발표회 논문집
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• pp.289-290
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• 2010

Orthoimage, digital map, cadastral map, and areas and district were converted and overlaid so as to apply legal restrictions on boundaries set by a land object concept restriction line and to analyze boundaries formed by overlaying areas and districts and characteristics of restrictions. With the restriction lines made on the basis of orthoimage.

• 동굴
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• 제65호
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• pp.21-30
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• 2004

Greenbelt Zones or park areas such as cave areas have strong zoning restrictions that prevent developments. However, whenever it is needed to free the restrictions for development, planning departments are faced with the problems of which part in the area should select. Especially when households are scattered in small groups, there must be a clear guidelines in order to determine the areas having high potential for development while minimizing resistance from the residents. The methodologies should include means to incorporate many different aspects of decision elements. This study presents strategies to choose groups of residents by employing the concentration index of them and means to incorporate preferences among different decision factors using the AHP method.