• The Mathematical Education
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• v.25 no.1
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• pp.1-8
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• 1986

It is a common saying that markov-chain is a special case of probability course. That is to say, It means an unchangeable markov-chain process of the transition-probability of discontinuous time. There are two kinds of ways to show transition probability parade matrix theory. The first is the way by arrangement of a rightangled tetragon. The second part is a vertical measurement and direction sing by transition-circle. In this essay, I try to find out existence of procession for transition-probability applied markov-chain. And it is possible for me to know not only, what it is basic on a study of chain but also being applied to abnormal problems following a flow change and statistic facts expecting to use as a model of air expansion in physics.

• Journal of the Korea Safety Management & Science
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• v.18 no.2
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• pp.73-81
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• 2016

In manufacturing company, safety is a important issue because it can cause many cost and problems of company. So reduce safety accident can increase manufacturing company's productivity. Safety accident has close relationship with employee's behavior, which is 'safety behavior'. In this study, researcher try to find out role of leader-member exchange and employee's job commitment effect on safety behavior in manufacturing company. A total of 279 responses were collected from manufacturing company's employees. The result of this empirical study show us that leader-member exchange has positive effect on employee's job commitment and safety behaviot. And job commitment has positive effect on safety behavior. Base on this empirical result, researcher provide critics and manageric implication for manufacturing companies.

• Journal of the Korea Safety Management & Science
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• v.18 no.2
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• pp.101-107
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• 2016

This study is to find out the acceptance intention of international logistics platform which meet the needs of each other of shipper and international logistics company in the online. As you may know, the many korean traditional international logistics companies which have to compete with global logistics companies focused on economics of scale, have been in a big trouble. In this circumstances, though they should get used to the change to survive, they do not know what they try to overcome. So, I hope that this study would be helpful to them.

• Journal of Korean Society for Quality Management
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• v.36 no.1
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• pp.49-61
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• 2008

The classical IT-Outsourcing studies have focused on the factors which a company decides for the IT-Outsourcing strategy. But the main concerns of recent researches are more about the Critical Success Factors determining the Success of the IT-Outsourcing service. Especially, the factors, which enhance the level of Success during and after the implementation of IT-Outsourcing services, are the main field of the recent researches. The study about the Partnership between Outsourcer and Outsourcee are also one of the most frequently researched themes. The result of these studies shows us that the "Reliability" and "Communication" are the main factors for the successful partnership. In this paper we try to find out how the IT-Outsourcing factors (independent variable) have influenced on the Success of IT-Outsourcing strategy (dependent variable) with 4 kinds of parameters. These moderate variables are the 4-types of Partnership by FORT, that is, "Support", "Reliance", "Alignment" and "Alliance".

• Transactions of Materials Processing
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• v.8 no.2
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• pp.127-134
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• 1999

This study suggests the practical method which can reduce the lead time of the field trial and design of the dies. The virtual manufacturing, with which the die design is evaluated by computer analysis, reveals the impropriety of a design before die makings. Three methods for reducing the die making process occupying over 60% of the automotive development are like follows: First, the crack and wrinkle occurrence can be prevented by virtually adjusting the blank holding force and drawbead force with a computer simulation. Second, the parts which can not remove the forming defects in spite of the adjustment of forming parameters need to modify the part geometry or punch temporary shape. Third, the simulation before field trial, and field trial simulation can be effectively used in die design.

• Water for future
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• v.22 no.1
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• pp.109-116
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• 1989

An attempt is made to describe the theory an computer algorithm of the SSARR model, and to try it's application to the small satershed, by using the estimation of the model parameters with the data of Bochong stream basin. The selected period of the hydrological data is from 1982 to 1988 for the modeling. The selected basin is the Bochong stream basin which is one of the tributaries of Geum river. The estimation of model parameters and sensitivity test are carried out for the analysis of the characteristics of model parameters.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2004.11a
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• pp.137-142
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• 2004

Recently. the number of the use of Digital Photogrammetry is increasing, and photogrammetry instruments are developing rapidly and the pression is improving continuously. In this study, using the Rollei d7 metric that is a measurement digital camera which has capacity of keeping numerial value by itself and easy carrying, we analyze the 3 dimensional hydraulic experiment model. First, we calculated RMSE by carrying out bundle adjustment. Second, we try to find a effective 3D DEM with the Kriging Interpolation, Third make a comparative study the DEM of the Triangulation with the DEM of the close-range digital photogrammetry.

• Journal of the Korean Society for Heat Treatment
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• v.25 no.3
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• pp.121-125
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• 2012

The large forgings used in chemical plants or nuclear power plants are produced by complex heat treatment. because of thickness up to 200~300 mm and weight up to 200~300 ton, setting proper heat treatment cycle is so difficult. In addition, defects of products make companies wasting large money and valuable time. In this study, to reduce try & err, when setting heat treatment of reactor pressure vessel steel SA508Gr.3, carrying out the basic mechanical property test of SA508 Gr.3 and testing hardness of SA508Gr.3 in various tempering temperature. and calculating temper curve with Hollomon-Jaffe parameter.

• Journal of Korean society of Dental Hygiene
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• v.14 no.4
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• pp.519-526
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• 2014

Objectives : The purpose of the study is to investigate the relationship between employment stress and oral symptoms in health college students. Methods : A self-reported questionnaire was filled out by 275 health college students in Seoul from October 7 to November 29, 2013. The data were analyzed using SPSS WIN 14.0 program. Results : Female students tended to have higher employment stress oral symptoms than male. The higher the employment stress was, the more oral symptoms were. There was a close relationship between personal trait, environmental stress and oral symptoms. Regression analysis showed that tongue, teeth, gum, temporomandibular joint(TMJ) were influenced by the employment stress. Conclusions : It is important to reduce the environmental stress in the students. The students themselves must try to overcome the agonal condition by diverting stress into positive way of living.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2008.04a
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• pp.171-176
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• 2008

Rapid social change affects residential environments and this in turn creates new stimuli to which people have to adapt. These stimuli have been seen to increase stress levels. Therefore, dwellers in these environments try to reduce stress through various methods. The purpose of this paper is to: 1) identify the general trends of coping styles about residential environmental stress, 2) analyze the differences in socio-demographic characteristics and how the physical characteristics of buildings affect stress, find out how personal backgrounds affect stress levels and the ability to get rid of environmental-related stress. The subjects in this study consisted of people living in multi-family housing in Gwang-ju. The city is divided into 5 districts and used quota sampling. 324 housewives were surveyed from the households by self-administered questionnaires. The survey was conducted in December, 2006, after the questionnaire was revised based on the results of preliminary survey. After all the questionnaires were collected, the data was coded and analyzed using the SPSS 12.0 program.