• 경영과학
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• 제20권1호
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• pp.125-139
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• 2003

City gas is becoming an essential resource in households due to its convenience and low price in comparison to other energy sources. However, in order to prepare for the gas market to be saturated, many city gas companies must pursue customer satisfaction management and develop happy call systems for a promising solution. In the development of the happy call systems, the difficult problem is that we cannot contact all customers because of limited resources and calling efficiency in the call center, We should find best customers according to their value. This paper suggests a methodology for the selection of happy call customers when city 9as companies consider two strategies. First, they should launch a new business area. Second, they must attempt to prevent current customers from moving from city gas to other fuels. We will discover important attributes and derive rules of weighting for the attributes through an exploration study that affect customer satisfaction and preference. Through a simulation model, we will show how many customers will be selected by our methodology.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1995년도 추계학술대회 논문집
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• pp.289-292
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• 1995

In this experiment the specimen is selected for epoxy resin used in the molding compound materials for the power semiconductors. The specimen was divided into the two parts. one is a specimen without irradiation, the other is irradiated with electron beam, of which dose is 1[Mrad], 2[Mrad], 4[Mrad], 8[Mrad] and 24[Mrad], respectively. From the analysis for the physical properties of the specimen, the carbonyl group which is asffact the electrical properties is decreased according to increase the dose of the electron beam. In the measurement of dielectric characteristics among the electrical properties, the frequency dependance of the dielectric characteristics is confirmed that its ${\beta}$-peak is represented by one peak due to attribute to the main chain below 50[$^{\circ}C$], and two peak above the temperature 100[$^{\circ}C$].

• 한국관광식음료학회지:관광식음료경영연구
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• 제17권1호
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• pp.21-40
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• 2006

This researches aimed to find out the influence of Attribution making Image of hotel on Brand Loyalty at the Service Encounter. To achieve its goal, variables corresponding to the actual circumstances of hotels have been sampled on the basis of documentary studies. In addition, the research model, hypothesis, range of the research, and samples were selected and set up. Bellow Theoretical Results show us how effectively hotel's Image properties attributed at the Service Encounter can affect in making the Image of hotel positively and form the higher Brand Loyalty. Brand Loyalty can not be established at a time. Hotel's marketer will have to trace every single change of Band Loyalty through Marketing Research and Maintain a dominant position through a continuous relationship with guests.

• 아동학회지
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• 제13권2호
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• pp.161-174
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• 1992

The purpose of this study was to examine the differences between aggressive and nonaggressive boys with the use of a social information processing approach. The subjects were 80 3rd & 6th grade boys selected from a public elementary school in Seoul. The subjects were interviewed individually. Following the presentation of each story, five questions were asked. A 2 x 2 Analysis of Variance was performed for each of the 5 dependent measures. Results showed (1) Aggressive boys were more likely to attribute a hostile intention to the behavior of peer. (2) Aggressive boys predicted their own response as more hostile and aggressive. (3) The 6th graders generated more alternative solutions than the 3rd graders. (4) Non significant results are not reported in the abstract. (5) Aggressive boys were likely to choose an ineffective solution.

• 한국군사과학기술학회지
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• 제12권5호
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• pp.557-562
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• 2009

Weapon system currently considers the research about effect analysis including cost effectiveness methodology for a budget management and an achievement of the military strategy goal. So that, this study considers the theoretical background, strength and weakness of several Multi-Criteria Decision Making, and an effect analysis of weapon system. And AHP(Analytic Hierarchy Process) is selected for the best effect analysis methodology of weapon system. Therefore, we applied AHP to the case study of the new generation Multiple Launcher Rocket System, performing the analysis of cost effectiveness methodology. Using AHP and cost effectiveness methodology, we propose the actual and proper decision making result.

• 전기학회논문지
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• 제66권11호
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• pp.1634-1640
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• 2017

The study aims to distinguish hemiplegic gait and normal gait using simple wearable device and classification algorithm. Thus, we developed a wearable system equipped three axis accelerometer and three axis gyroscope. The developed wearable system was verified by clinical experiment. In experiment, twenty one normal subjects and twenty one patients undergoing stroke treatment were participated. Based on the measured inertial signal, a random forest algorithm was used to classify hemiplegic gait. Four-fold cross validation was applied to ensure the reliability of the results. To select optimal attributes, we applied the forward search algorithm with 10 times of repetition, then selected five most frequently attributes were chosen as a final attribute. The results of this study showed that 95.2% of accuracy in hemiplegic gait and normal gait classification and 77.4% of accuracy in hemiplegic-side and normal gait classification.

• 국제초고층학회논문집
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• 제3권4호
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• pp.273-278
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• 2014

Green roof's performance in reducing stormwater runoff has been reported by numerous studies. Nonetheless, the roles of low growing vegetation in influencing stormwater runoff reduction on green roofs have been greatly overlooked. This paper describes an experiment investigating the influence of low growing vegetation in the reduction of tropical stormwater runoff on extensive green roofs. Three types of locally occurring native vegetation and one non-native Sedum species were selected (fern, herb, grass and succulent) for the experiment. Stormwater runoff reduction performance from different low growing species was done by measuring excess water runoff from the simulated green roof modules. The results show significant differences in stormwater runoff reduction from different types of vegetation. Fern was the most effective in reducing stormwater runoff, followed by herb, Sedum and grass. Vegetative characters that are found to attribute towards the performance of stormwater runoff are rooting density, structure, density, leaf type, and vegetation biomass.

• 한국사회복지학
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• 제42권
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• pp.314-339
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• 2000

To identify adolescents' moral reasoning and attribution about peer violence, vignette study was conducted. 178 subjects selected from 4 inner city schools were asked to evaluate provoked violent situations. 4 situations depicting the provocation/retribution condition and 3 short vignettes depicting peer violence were presented, and adolescents were asked to judge the violent behavior and the morality of story characters. Analyses revealed that many adolescents focused more on the immorality of the provocation and perceived "hitting back" as a form of reciprocal justice. And a number of adolescents attributed the responsibility to the both of prosecutors and victims with situations which have obscure informations to judge the violent behaviors. In addition, adolescents having more violent characteristics were more likely to attribute the responsibility of violence to the victims than non-violent adolescents. Several suggestions based on these results are as follows: First, school or class-based conflict resolution program should be implemented to intervene in a dispute between peers. Second, it is necessary for comprehensive program such as Aggression Replacement Training including moral education as well as behavior modification to resolve peer violence.

• 수산해양교육연구
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• 제29권2호
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• pp.593-606
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• 2017

This study aims to provide preliminary data capable of suggesting directivity of an initiating start by understanding consumer awareness through analysis of SNS social big data on marine sports. This study selected windsurfing, yacht, jet ski, scuba diving and sea fishing as research subjects, and produced following results by setting period of total 1 month from January 22 through February 22, 2017 on the SNS (twitter, blog) through the Social MatrixTM service of Daumsoft Co., Ltd., and analyzing frequency of mention, associated words etc. First, sports that was mentioned the most out of marine sports was yacht, which was 3,273 cases on twitter and 2,199 on blog respectively. Second, the word which was shown the most associated with marine sports was the attribute showing unique characteristic of marine sports, which was 6,261 cases in total.

• 통합자연과학논문집
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• 제14권2호
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• pp.35-40
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• 2021

In this paper, we proposed a multi-subject-level sentiment analysis model for user reviews using the Latent Dirichlet Allocation (LDA) method targeting user-generated content (UGC). Data were collected from users' online reviews of hotels in major tourist cities in the world, and 30 hotel-related topics were extracted using the entire user reviews through the LDA technique. Six major hotel-related themes (Cleanliness, Location, Rooms, Service, Sleep Quality, and Value) were selected from the extracted themes, and emotions were evaluated for sentences corresponding to six themes in each user review in the proposed sentiment analysis model. Sentiment was analyzed using a dictionary. In addition, the performance of the proposed sentiment analysis model was evaluated by comparing the emotional values for each subject in the user reviews and the detailed scores evaluated by the user directly for each hotel attribute. As a result of analyzing the values of accuracy and recall of the proposed sentiment analysis model, it was analyzed that the efficiency was high.