• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.1
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• pp.19-25
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• 2020

In frequent pattern mining, the uncertainty of each item is accompanied by a loss of information. AAlso, in real environment, the importance of patterns changes with time, so fuzzy logic must be applied to meet these requirements and the dynamic characteristics of the importance of patterns should be considered. In this paper, we propose a fuzzy utility mining technique for extracting frequent web page sets from web log databases through fuzzy utility-based web page set mining. Here, the downward closure characteristic of the fuzzy set is applied to remove a large space by the minimum fuzzy utility threshold (MFUT)and the user-defined percentile(UDP). Extensive performance analyses show that our algorithm is very efficient and scalable for Fuzzy Utility Mining using dynamic weights.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.29 no.5
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• pp.413-419
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• 2016

Damage of infrastructures by an earthquake causes the secondary damage through the world at large more than the damage of the structures themselves. Amomg them, underground utility tunnel structures comes under the special life line: communication, gas, electricity and etc. and it has a need to evaluate its fragility to an earthquake exactly. Therefore, the destruction ability according to peak ground acceleration of earthquakes for the underground utility tunnels is evaluated in this paper. As an input ground motion for evaluating seismic fragilities, real earthquakes and artificial seismic waves which could be generated in the Korean peninsula are used. And as a seismic analysis method, response displacement method and time history analyzing method are used. An limit state which determines whether destruction is based on the bending moment and shear deformation. A method used to deduct seismic fragility curve is method of maximum likelihood and the distribution function is assumed to the log normal distribution. It could evaluate the damage of underground utility tunnels to an earthquake and could be applied as basic data for seismic design of underground utility tunnel structures.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.178-179
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• 2011

The exchange of information with legacy systems is a main issue in the era of SMARTGRID. Because WAMAC(Wide Area Monitoring and Control) system has monitoring function, as well as control function, it is very necessary for WAMAC to exchange data and information with SCADA(Supervisory Control and Data Acquisition) / EMS(Energy Management System). IEC 61970 CIM(Common Information Model) is an abstract model that represents all the major objects in an electric utility enterprise typically involved in utility operations. In this paper, a proposal that adopting CIM to WAMAC model be submitted so that the integration of various legacy system and application for itself be able to be flexible.

• Journal of the Korea Computer Industry Society
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• v.3 no.5
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• pp.623-630
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• 2002

Method of designing and implementing the XML Gateway is proposed for supporting the data movement between the Legacy databases. XML technologies, Oracle XML Utility, and JDeveloper are used for this purpose. The data in Legacy database are extracted by XSQL pages, parsed, transformed by XSL, and finally saved by XMLHttprequest object of XSQL servlet. With the help of the implemented system, an assigned operator does not have to handle the database with the SQL＊Plus tools. In addition, the data movement is easily carried out by using the familiar Web interface offered by system.

• Journal of the Korean Institute of Landscape Architecture
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• v.24 no.3
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• pp.29-41
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• 1996

The purposes of this study were to develope some techniques which can be used in the landscape simulation process using PC based computer grahics. As a result, a couple of utilities were programmed in AutoLISP language. The one(DSLINE.LSP) is to digitize 2-dimensional structuer forms in the interactive mode considering error handling, and the other one (IMPOST.LSP) is for superimposing and visualizing the digitized plan data to 3-dimension solids & surfaces referring to topographic elevations of meshes in digital terrain model. By applying utilities to present site, the followings may be described. 1) The utility DSLINE.LSP for digitizing simplified building structure form were proved to be easy to input data of polygons including orthogonal edges by handling user coordinates system and checking invalid intersection and default colsing. 2) IMPOST.LSP utility for superimposing and visualizing tool were proved to be more complicated and speedy in calculating process compared with a practical application of modeling tool before rendering process in landscape simulation of built environment on topographic relief, on specially mesospace level of assessment.

• Journal of Korean Academy of Nursing Administration
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• v.7 no.1
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• pp.127-144
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• 2001

The purpose of this study is to provided a basic administrative data for effective personnel management of nurses' by investigation their assessment and satisfaction with the job rotation and by analyzing the relation between their satisfaction and organizational commitment. Data were collected from Nov. 20 to Nov. 25, 2000 through self-reporting questionnaires taken by 280 nurses working at a university hospitals The 3 structured instruments were used for collecting the data; Questionnaires for measuring the utility and the problem of job rotation, Questionaires for measuring the satisfaction with the job rotation, and Mowday's Organizational Commitment Questionnaires. The data obtained were analyzed using frequency, percentage, average, standard deviation, range, Cronbach's alpha coefficients, Peason's correlation coefficients, t-test, one-way ANOVA, and chi-square test, multiple regression. The Results were as follows : 1. The supporters for regular job rotation account for 67% while the opponents to it account for 33%. The chief reason for endorsing the regular job rotation is quoted ${\lceil}$to attain more diverse job experiences${\rfloor}$, followed in order by ${\lceil}$to improve the job motivation and morale through the realization of personal needs${\rfloor}$, ${\lceil}$to place the right man in the right position${\rfloor}$. The reasons for opposing to the regular job rotation were listed in order ${\lceil}$difficulties to secure the expertise of nursing${\rfloor}$, ${\lceil}$personal needs not fully reflected in the job rotation${\rfloor}$, ${\lceil}$job rotations prompted rather by the administrative needs than by personal aptitude and ability${\rfloor}$. 2. In the assessment of job rotation, the points affirming the utility of the job rotation are $2.60({\pm}.66)$ out of possible 5 points and those admitting the problems the job rotation are $3.58({\pm}.59)$. The satisfaction with the job rotation is rated at $2.98({\pm}.55)$. 3. In the analysis into the relation between the assessment of job rotation and satisfaction with the job rotation, fairly high positive correlation is revealed between the satisfaction and utility of job rotation, whereas, considerably high negative correlation is seen between the satisfaction and problems with the job rotation(p=.000). 4. There is relatively high positive correlation between the satisfaction with the job rotation and organizational commitment(p=.000). In conclusion, the utility of on the job rotation and their satisfaction with the job rotation have positive correlation and the satisfaction with the job rotation and organizational commitment showed the positive correlation, too. Therefore, it is thought desirable to take administrative strategies well as education to improve the recognition of the job rotation's utility and to reduce the recognition of the problems with the job rotation to remain in the direction toward contributing to enhancement of the organizational commitment.

• The Korean Journal of Community Living Science
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• v.22 no.3
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• pp.327-339
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• 2011

This study aims to investigate relationships between benefit sought and selection attributes of green tea consumers. For data collection, a total of 595 copies of questionnaires were collected by convenience sampling in the Seoul and Gyeonggi-do area. The data were analyzed by using SPSS 15.0. The factor analysis identified four dimensions of the benefit sought : health benefit, sensory, sociality, and self-esteem. Six dimensions of selection attributes were identified as manufacturing, design, sensory appeal, recommendation, utility and brand. The results of the canonical correlation analysis indicated that health benefit, sensory, sociality of benefit sought and manufacturing, design, sensory appeal, recommendation, utility, brand of selection attributes were highly correlated, and the self-esteem of benefit sought and recommendation of selection attribute were highly correlated. This means it is important to place an emphasis on safety production, package design, sensory characteristics, product description, utility and brand for consumers who seek health benefit, flavor and sociality. It is also important to place an emphasis on product description for consumers who pursue self-esteem benefits. Green tea marketers should consider benefit sought aspects as the most important factors affecting selection attributes on green tea purchasing.

• Journal of the military operations research society of Korea
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• v.23 no.2
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• pp.15-24
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• 1997

In this paper we suggested a performance evaluation model for future weapon systems. Weapon Performance Index(WPI) model transform the characteristics of alternatives as indices. We can easily obtain WPIs of alternatives with the model. The highest WPI recommended as the best solution. The performance elements in hierachy for future weapon systems are determined by systems engineering procedure. Priorities in hierachy can be determined through survey of experts engineering procedure. Priorities in hierachy can be determined through survey of experts and statistical analysis. Utility function is formulated as a probability model and utility score is predicted on the basis of historical data about the same category of weapon systems in the world. WPI is calculate from sum of product of priorities and utility scores. The model can be applied to trade-off analysis, cost and effectiveness analysis, war game model.

• Journal of the Korea Safety Management & Science
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• v.10 no.2
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• pp.225-235
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• 2008

It is expected that the change of industrial structure of Knowledge based economy, and service based economy would affect on economic life of physically-challenged person with no exceptions. There have been some former studies which have been misunderstood the employment of disabled due to the declining employment of the disabled and prejudice to the disabled based on biased perspective and public opinion. This study have analyzed the employment conditions of the ordinary workers and disabled workers out of those prejudices and biased opinions. Wage, economic activity ratio, age, educational background and industry those 5 parameters are brought for analyzing the two comparison group. Each parameter have compared based on the statistical data of ordinary workers and disabled workers for past 7 years. Weight between each parameter have been drawn by collecting the experts' opinion using AHP(Analytic Hierarchy Process), and utility of employment of two comparison groups have been estimated through progress inclination of each parameter. Through the estimated outcome, present condition and controversial issues and way of improvement of domestic employment of ordinary workers and the disabled is mentioned.

• Industrial Engineering and Management Systems
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• v.11 no.2
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• pp.148-154
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• 2012

Micro Electric Vehicles are considered as a solution for reducing $CO_2$ emissions, however, it is difficult to evaluate its impact in a local community when it has been introduced. In this study, we evaluated how to spread the Micro EV within the community, using the utility derived from a multinomial logit model, and analyze the effect on $CO_2$ emissions. The householder's utility model is based on an investigation about Kiryu citizen's activities of shopping, transportation methods, etc. Using the geographic information system, we get the distances of each householder and the stores, and estimate a multinomial logit model about the combination choices of shopping stores and transportation method.