• Transactions of the Korean Society of Automotive Engineers
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• v.6 no.3
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• pp.154-160
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• 1998

Ride quality of medium truck became a very important factor in the suspension design, to the demand of more comfortable ride of passengers. This study describes how to determine and evaluate design parameters related to the chassis suspension system with time and frequency analysis. The spring stiffness and damping force of the chassis suspension system were obtained by observing the vertical acceleration PSD. The simulation was carried out on various road profiles, which was suggested by ISO. The pitching motion of the medium size truck was observed to improve the ride quality. A computer simulated truck model was constructed using DADS, a commercial dynamic analysis software, in order to simulate the truck motions. From the analyzed process of suspension parameters, it was concluded that the spring and the shock absorbers affect the pitching of the vehicle. In order to validate the computer simulated truck model, a physical prototype was constructed and tested.

• Journal of Korean Society for Quality Management
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• v.37 no.3
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• pp.123-139
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• 2009

This study examines the relative efficiency of 34 local public medical centers in Korea. In order to concretely grasp the causes of inefficiency and suggest improvement solutions, the desirable set point was established based on the actual value which needs to be improved. As a result of analysis, we determined that output must be increased while input is held constant in order to improve effectiveness through the actual value and set point. Efficiency cannot be achieved if input is augmented solely to increase output. Also, to increase output, the medical centers need to improve their quality without increasing any input for customer visits and hospitalizations. Further, in order to strategically promote effectiveness and efficiency of local public medical centers, these medical centers must focus on input resource and patient interchange through the mutual cooperation with local private hospitals and university medical centers.

• Journal of Electrical Engineering and Technology
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• v.10 no.5
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• pp.2189-2196
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• 2015

Stereo matching algorithm is usually used to obtain a disparity map from a pair of images. However, the disparity map obtained by using stereo matching contains lots of noise and error regions. In this paper, we propose a virtual-view synthesis algorithm using disparity refinement in order to improve the quality of the synthesized image. First, the error region is detected by examining the consistency of the disparity maps. Then, motion information is acquired by applying optical flow to texture component of the image in order to improve the performance. Then, the occlusion region is found using optical flow on the texture component of the image in order to improve the performance of the optical flow. The refined disparity map is finally used for the synthesis of the virtual view image. The experimental results show that the proposed algorithm improves the quality of the generated virtual-view.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.13 no.21
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• pp.73-79
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• 1990

The quality and cost of manufacturing products is a significant problem in view of duality assurance, but the quality level of the incoming materials is not considered to determine in the economic order quantity of conservative inventory model. A typical situation we face is the difference of quantity between order quantity and the determined outgoing quantity after acceptance inspection. In this paper we present a procedure to reduce the difference of order(ingoing) quantity and outgoing quantity of incoming materials a method of justifying the acceptance plans whether accept or not by comparing with ingoing outgoing quality.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.11a
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• pp.421-426
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• 2005

For the air-conditioner, refrigerant induced noise and vibration should be the problem when it reduced airflow rate in order to reduce the noise at low mode. With the test, it could be verified that one of the main reason for refrigerant induced noise were the velocity and flowing induced force of the refrigerant at the inlet of evaporator. So in order to reduce this velocity with same mass flow rate of refrigerant, quality at the evaporator inlet should be minimized. And in order to reduce flowing induced force of the refrigerant, flowing direction change should be eliminated. So in this paper, it would like to review the characteristics of refrigerating cycle at first and find how the quality and flowing induced force can be minimized.

• Journal of Korean Society for Quality Management
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• v.23 no.4
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• pp.100-112
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• 1995

Data on nearly one hundred thousands of Korean quality circles, registered with KSA(Korean standard association), are classified by regional groups, size, and industry. The classified data are analyzed in order to investigate the actual state of quality circles. Some international comparisons such as managerial objectives for introducing quality circles are also included.

• Journal of Korean Society for Atmospheric Environment
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• v.20 no.2
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• pp.237-249
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• 2004

With the increasing concern over the air quality degradation, there are growing demands to accurately and precisely measure air quality. In this article, the general principles and approaches were described to help aid proper evaluation of air quality. In order to introduce the basic approaches for conducting field/laboratory experiments and for interpreting experimental data sets, we explained all the common methodologies involved and provided some insights into the desirable protocols for air quality measurements.

• Asian Journal for Public Opinion Research
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• v.2 no.1
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• pp.32-51
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• 2014

Quality of Life in Pakistan is an understudied and rather unexplored domain. With various definitions and challenges to explaining quality of life, a public opinion poll and scientific surveys have been conducted in order to find out more about the quality of life in Pakistan. Using a nationally representative sample, this paper seeks to identify quality of life measures, find results, and analyze them to see what they mean, specifically in the context of Pakistan.

• Korean Journal of Construction Engineering and Management
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• v.1 no.1 s.1
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• pp.72-79
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• 2000

Design quality in constructed project is a primary consideration to achieve overall project objectives. It is not easy to evaluate the design quality because various factors are involved in the design process. This paper presents a new approach to improve the evaluation process of design quality In the construction project The evaluation model is developed to satisfy the requirement for implementing the ISO 9000 Quality Assurance Standards in the design process. It is assumed that design changes are resulted from the poor management of design quality. The model relates design changes to design quality management items. It assigns weight ratio to each design quality item to evaluate quantitatively Design Quality Index (DQI) is calculated to assess design quality based on the Objectives Matrix. A case study is performed to illustrate the practical implementation of the design quality evaluation.

• Journal of Korean Clinical Health Science
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• v.5 no.3
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• pp.943-952
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• 2017

Purpose: The purpose of this study was to investigate the effects of dental hygiene and students' academic achievement and their quality of life. Methods: A self administered questionnaire was used for third and fourth year dental hygienists which consisted of 423 female students. The data was analyzed using SPSS ver.19.0. Results: The results of this study are as follows(p<0.01). First, the effect of academic achievement on quality of life was found to affect an ideal life, life satisfaction and the quality of maintaining a happy life (p<0.05). The correlations between objective academic achievements and the quality of life of the subjects were correlated in all items (p<0.01, p<0.05). Conclusion: To summarize the above results, in order to improve the quality of life for dental hygienists and students, it is necessary to take various measures in order for students to maintain a sense of pride in their various departments and to be able to concentrate on their respective studies.