• Journal of Electrical Engineering and Technology
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• v.12 no.6
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• pp.2399-2410
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• 2017

In this paper, a linear matrix inequality-based sampled-data fuzzy observer design method is proposed based on the exact discretization approach. In the proposed design technique, a numerically relaxed observer design condition is obtained by using the discrete-time fuzzy Lyapunov function. Unlike the existing studies, the designed observer is robust to the uncertain premise variable because the fuzzy observer is designed under the imperfect premise matching condition, in which the membership functions of the system and observer are mismatched. In addition, we apply the proposed method to the state estimation problem of the attitude and heading reference system (AHRS). To do this, we derive a Takagi-Sugeno fuzzy model for the AHRS system, and validate the proposed method through the hardware experiment.

• The Journal of Korea Robotics Society
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• v.15 no.1
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• pp.32-38
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• 2020

This paper describes a method for tracking attitude and position of underwater robots. Underwater work with underwater robots is subject to differences in work efficiency depending on the skill of the operator and the utilization of additional sensors. Therefore, this study developed an underwater robot that can operate autonomously and maintain a certain attitude when working underwater to reduce difference of work efficiency. The developed underwater robot uses 8 thrusters to control 6 degrees of freedom motion, IMU (Inertial Measurement Unit), DVL (Doppler Velocity Log) and PS (Pressure Sensor) to measure attitude and position. In addition, the thruster allocation algorithm was designed to follow the control desired value using 8 thrusters, and the motion control experiments were performed in the engineering water basin using the thruster allocation method.

• Journal of the Korean Operations Research and Management Science Society
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• v.18 no.3
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• pp.65-77
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• 1993

It is not to observe that a decision-maker frequently changes his choice strategy in the repetitive gamble choice situation. This change in risk preference attitude, however, is not well explained with the existing gamble choice models, such as Bell's disappointment-elation model which is an interesting extension of the classical MEU model. This paper shows that this change in risk preference attitude should be interpreted as a systematic transition of "d" and "e", the disappointment and elation constants of Bell's model repectively. A laboratory experiment is also performed to identify the factors which greatly affect the decision-makers' risk preference attitude change. The number of consecutive successes/failures and the amount of remaining capital found to be statistically significant factors.significant factors.

• Korean Management Science Review
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• v.31 no.4
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• pp.15-28
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• 2014

The present study examined the effects of self-construal and message orientation on value advocacy advertising. An experiment of college students was conducted to investigate relationship between the attitude toward advocacy advertisements and the purchase intention. The results showed that people with interdependent self-construal have more positive attitude toward the advocacy advertisements than people with independent self-construal. The interaction effects between self-construal and message orientation on the value advocacy advertisements were not found significant. However, it was found that even people with independent self-construal showed more positive attitude toward the advocacy advertisement with others-orientation messages than the advertisement with self-orientation messages in value advocacy advertising. Based on the findings, theoretical and managerial implications for value advocacy advertising were discussed.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1992.04b
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• pp.282-292
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• 1992

It is not rare to observe that a decision-maker frequently changes his choice strategy in the repetitive gamble choice situation. This change in risk preference attitude, however, is not well explained with the existing gamble choice models, such as Bell's disappointment-elation model which is an interesting extension of the classical MEU model. The paper shows that this change in risk preference attitude should be interpreted as a systematic transition of "d" and "e", the disappointment and elation constants of Bell's model. A laboratory experiment is also performed to identify the factors which greatly affect the decision-makers' risk preference attitude change. The number of consecutive successes/failures and the amount of remaining capital found to be statistically significant factors.significant factors.

• Fashion & Textile Research Journal
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• v.8 no.2
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• pp.177-182
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• 2006

The purpose of this study is to examine the effect of media on plastic surgery experiment. Firstly this study try to find the relationship between exposure to media and other intervening factors(e.g., body image, self-esteem, fashion attitude). The data collected for this study was gathered through questionnaire survey with 443 female students in Seoul. The results are as follows: Using ANOVA, we found that those prefer the magazine over TV or Internet had positive body image, higher self-esteem, and positive fashion attitude(e.g., personality/self-expression, fashion leadership, sexual attraction). Using regression analysis, we found that the we found that the factors influence plastic surgery behavior are the exposure to magazine and the factors influence plastic surgery planning are the clothing attitude (especially fashion leading power, sexual attraction).

• Journal of Fisheries and Marine Sciences Education
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• v.27 no.3
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• pp.634-643
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• 2015

The purpose of this study was to evaluate the effect of the invention animations on the invention attitudes of elementary school students. This study was conducted with a pre-and-post test experimental design. The participants were 73 students from J elementary school in Daejeon. Among them, 36 students were the experiment group and 37 students were the comparison group. Watching invention animations were conducted in a classroom everyday for 24 times. Assessments of Invention Attitudes were administered to all the participants during the pre-test and post-test. To analyze the data, the analysis of covariance(ANCOVA) was adopted. The result of this study was as follows: The experimental group who watched invention animations showed significantly higher improvement in Invention Attitudes and sub-factors of Invention Attitudes(Attentional Attitude, Emotional Attitude, Cognitional Attitude) than the comparison group. In conclusion, watching invention animations had positive effect on the invention attitudes of elementary school students.

• Journal of Information Technology Services
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• v.18 no.1
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• pp.1-12
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• 2019

The purpose of this study is to find out what type of skip button used in forced exposure advertising is the most positive to the users. The four types of skip buttons were produced for the experiment and tested by survey and eye tracker to reveal the effects of the skip buttons on perceived intrusion, advertising attention, attitude toward advertising, and memory consisting of recall and recognition. Out of 80 participants, 20 were randomly assigned to the specific type of skip button group. The results showed that there is no statistical difference in advertising attention, perceived intrusiveness and attitude toward advertising. However, the recall and recognition rate are the highest in the static text type and kinetic text, product image, and default follow statistically. This study has implications for using skip buttons as a major variable for inventory of TrueView advertising effects and suggests that the amount of information in the image is critical processed by users within very short time.

• Asian Journal for Public Opinion Research
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• v.10 no.3
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• pp.149-177
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• 2022

This study analyzes how inoculation affects the spiral of silence. Inoculation could be a beneficial tool in a democracy as it elevates citizens' resistance to attitude change "forced" by "the winning opinion" in the spiral of silence on a certain controversial issue. The study examines essential variables combined with the theories of inoculation and spiral of silence, such as resistance to counter-attitudinal attack, fear of isolation, and issue-involvement. A two-wave field experiment was employed to assess the formation of public opinion on Taiwan's political future with the People's Republic of China. Results support that inoculation enhanced people's resistance to attitude change and decreased their fear of isolation. Individuals who are more issue-involved were also shown to be more affected by inoculation, which allowed them to resist attitude change. The decreased fear of isolation, coupled with more issue involvement, might elevate people's willingness to speak out in public. More political discussions regarding an important public issue might be expected in a democracy.

• Journal of Korean Home Economics Education Association
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• v.26 no.1
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• pp.55-68
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• 2014

The study aims to develop teaching and learning media to raise up learners' interests and understanding during clothing class by providing a clothing swatch materials and its guide for applying to the unit of clothing in technology and home economics subject in middle school. To do so, clothing swatch materials, study sheet and guide were developed, applied and then analyzed for their effects. In this study, in order to figure out effects of class using clothing swatch materials on learning interest, learning necessity, learning understanding and academic achievements, the experiment was conducted for comparing and analyzing the learning interest, learning acceptance attitude and academic achievement between experiment group with using clothing swatch materials and control group without using the materials. The results of the study are as follows: First, the experiment group using clothing swatch materials shows higher learning interest than the control group without materials. Second, the experiment group showed higher learning acceptance attitude than the control group. Third, the experiment group achieved higher academic accomplishments than the control group.