• Journal of applied mathematics & informatics
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• v.30 no.3_4
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• pp.477-488
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• 2012

The convergence rate of a numerical procedure based on Schwarz Alternating Method(SAM) for solving elliptic boundary value problems depends on the selection of the interface conditions applied on the interior boundaries of the overlapping subdomains. It has been observed that the mixed interface condition, controlled by a parameter, can optimize SAM's convergence rate. In [8], one introduced the two-layer multi-parameterized SAM and determined the optimal values of the multi-parameters to produce the best convergence rate for one-dimensional elliptic boundary value problems. In this paper, we present a method which utilizes the one-dimensional result to get the optimal convergence rate for the two-dimensional problem.

• Bulletin of the Korean Mathematical Society
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• v.40 no.2
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• pp.195-205
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• 2003

For the boundary value problem (BVP) of second order functional differential equations for the one-dimensional $\rho$-Laplaclan: ($\Phi$$_{\rho}$(y'))'(t)+m(t)f(t, $y^{t}$ )=0 for t$\in$[0,1], y(t)=η(t) for t$\in$[-$\sigma$,0], y'(t)=ξ(t) for t$\in$[1,d], suitable conditions are imposed on f(t, $y^{t}$ ) which yield the existence of at least two positive solutions. Our result generalizes the main result of Avery, Chyan and Henderson.

• Journal of applied mathematics & informatics
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• v.29 no.1_2
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• pp.161-171
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• 2011

The convergence rate of a numerical procedure based on Schwarz Alternating Method(SAM) for solving elliptic boundary value problems depends on the selection of the interface conditions applied on the interior boundaries of the overlapping subdomains. It has been observed that the Robin condition (mixed interface condition), controlled by a parameter, can optimize SAM's convergence rate. In [7], one had formulated the multi-parameterized SAM and determined the optimal values of the multi-parameters to produce the best convergence rate for one-dimensional elliptic boundary value problems. However it was not successful for two-dimensional problem. In this paper, we present a new method which utilizes the one-dimensional result to get the optimal convergence rate for the two-dimensional problem.

• Journal of The Geomorphological Association of Korea
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• v.23 no.2
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• pp.15-27
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• 2016

Since restoration of damaged geomorphological sites is almost impossible, it is necessary, to select and conserve geomorphological heritages in a preemptive action. Algific (=producing cold) sites are one of the natural resources which have not been protected well due to the lack of understanding of their value, despite their conservation importance. This research aimed to help people to recognize such geosites' actual value and make them understand the necessity of protecting these sites. Algific areas are valuable by the simple fact that it is a mysterious phenomenon in which the ice forming may happen even in the mid-summer and the environment is always cool. Algific sites deserve geomorphological research in the sense that topographic condition called talus causes this phenomenon. They are also valuable in plant geographic sense because northern rare plants survive isolatedly due to low-temperature environment of these sites. Their cultural-historical value is also high by the fact that they have been connected closely with local residents' lives shown by its nicknames, "natural refrigerator" or "natural air conditioner".

• International Journal of Internet, Broadcasting and Communication
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• v.13 no.2
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• pp.218-223
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• 2021

The five elements of big data are said to be Volume, Variety, Velocity, Veracity, and Value. Among them, data lacking the Veracity of the data or fake data not only makes an error in decision making, but also hinders the creation of value. This study analyzed YouTube's revenue structure to focus the effect of data integrity on data valuation among these five factors. YouTube is one of the OTT service platforms, and due to COVID-19 in 2020, YouTube creators have emerged as a new profession. Among the revenue-generating models provided by YouTube, the process of generating advertising revenue based on click-based playback was analyzed. And, analyzed the process of subtracting the profits generated from invalid activities that not the clicks due to viewers' pure interests, then paying the final revenue. The invalid activity in YouTube's revenue structure is Raw Data, not pure viewing activity of viewers, and it was confirmed a direct impact on revenue generation. Through the analysis of this process, the new Data Value Chain was proposed.

• Journal of Family Resource Management and Policy Review
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• v.22 no.4
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• pp.75-87
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• 2018

The purpose of this study is to identify the intention of one-person households' selection in the university students. The survey was analyzed with factor analysis, reliability, cross tabulation analysis, t-value, and regression analysis with SPSS version. 18.0. The total of 237 male and female university students participated in the survey. The results were summarized as follows. First, there were significant differences between male and female students in the important factors, problems and reasons when selection of the one-person households in the future, and the perception of one-person households. Second, gender, perception of one-person households, the importance of self-improvement, housing expenses, and family rite had significant effects on the intention of one-person households' selection. The result of the study can be used as basic data for social discussion about one-person households.

• Journal of the Korea Fashion and Costume Design Association
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• v.4 no.2
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• pp.181-196
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• 2002

The functions of the clothing have been changed rapidly in modern society. That means people want to show oneself strongly by the clothing. In other words, the social aspect of the clothing's function which is the expression of own's personality and satisfaction one's desire is emphasized. This study is aimed at taking a look at the functions of modern clothing. The modern clothing has the various functions which are related to the changing of the social system. The result of the study are as follows: With the differentiation of society and institutionalization, the clothing is recognized as the medium which shows one's status and is restricted by people. In modern society as mass society, the system of the social position collapsed. People has the inclination to express own's consciousness, personality and existence intensely. Also, the functions of clothing became diverse. That means the clothing is influenced by the human's consciousness, a sense of values and became the medium which reflects the people's life. This change of the costume means the clothing focus on the functional factor of the free-style clothing getting out of rational value. Therefore, the change of clothing is not the change of the design but the change of value of the clothing, one's way of thinking about the clothing, the change of human life in whole society and the culture. With the changing way of life, the change of the clothing has the system in which the design changes. Therefore, I found that the we have to take a look not the change of the factors which influence the fashion but the functions of the clothing itself.

• Proceedings of the KSME Conference
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• 2003.04a
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• pp.255-260
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• 2003

Most of the fatigue test were achieved in fully reversed condition that mean stress is zero. But, generally, mean stress can not be zero. This research was achieved the bending fatigue test that changes mean stress to spring steel and was studied relation with the mean stress and the fatigue life. The method to search effect about mean stress was extended S-N graph in two cases. One method was extended S-N graph using modified Miner's rule with considering damage. Another was extended using tendency of S-N graph. The exponential value(${\alpha}$) of mean stress-alternating stress equation is converged between the Goodman's and the Gerber's value even if fatigue life increases.

• 한국정보통신설비학회:학술대회논문집
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• 2008.08a
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• pp.447-453
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• 2008

It is decidedly important to ensure QoS(Quality of Service) in order to make it possible a variety of multi-media services and realtime contents services in Wireless networks. One of methods to offer these services is the advanced prediction of Handoff through terminal's directional. In this paper, it is applied that the AP weight for the ground information of peripheral cell and the weight value of history table for the cell frequently visited. Also, it is expected that will be guarant QoS of substantial data in the case of Handoff through exact directional prediction of the next cell by using Kalman Filter algorithm applied GPS coordinates value.

• Korean Journal of Social Welfare
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• v.52
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• pp.273-299
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• 2003

Children in one-parent families have difficulties from negative perception and prejudice in society in spite of increasing divorce rate and the substantial number of one-parent families. This research aims to provide basic setting-up materials of the equal educational environment to children in one-parent families by examining teachers' perception and attitudes towards those children, and also analysing which factors are associated with the teachers' perceptions and attitudes. In particular, by exploring teachers' internalized value system and stereotyped conception are closely related to the process of evaluating children's personality and behavior, this research suggests that social consciousness to one-parent families should be changed and improved in terms of equality. According to the research result, most teachers notice that children in one-parent families are increasing by number at schools, however, they do not seem to understand properly children's situations including psychological condition. Teachers' negative perception of children in one-parent families are not only influenced by teachers' socio-demographic characteristics, experience factors and children's school life, but also by teachers' own personal value of familism and divorce. Such teachers' attitudes towards one-parent family children are easily predicted to influence children's confidentiality and self-respect. Therefore, it is proposed that the change of social consciousness on one-parent families, the change of educational system and educational environment, development of educational training program for teachers, allocation of school social worker or school counsellor, and empowerment of one-parent family are necessary in order children in one-parent families to have more equitable opportunities at school.