• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.24 no.4
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• pp.394-402
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• 2013

This paper presents design, fabrication and ruggedness test of switching-mode power amplifier using GaN(Gallium Nitride) HEMT(High Electron Mobility Transistor) for S-band radar applications. The power amplifier is designed to Class-F for high efficiency. The input signal for the measurement of the power amplifier is pulse signal at $100{\mu}s$ pulse width and duty cycle of 10 %. The measurement results of the fabricated Class-F power amplifier are a power gain of 10.8 dB, an output power of 40.8 dBm, a power added efficiency(PAE) of 54.2 %, and a drain efficiency of 62.6 %, at the center frequency. We proposed reliability test set-up of a power amplifier for ruggedness test. And we measured output power and efficiency according to VSWR(Voltage Standing Wave Ratio) variation. The designed power amplifier achieved output power of 32.6~41.1 dBm and drain efficiency of 23.4~63 % by changing VSWR, respectively.

• The Research Journal of the Costume Culture
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• v.17 no.4
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• pp.640-652
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• 2009

The purposes of this study were to provide information on customers for cosmetic companies to develop goods and promotion strategy by examining facial images of university women and their recognition level about cosmetics brand personality. The results were as follows; First, satisfaction level of university women with their lips and eyes was very high, while lowest in skins. Second, factors of brand personality of three kinds of foreign cosmetics brands and three kinds of domestic brands were sincerity, beauty, renovation, reliability and ruggedness. In beauty, reliability and ruggedness, they preferred foreign brands to domestic ones, while they preferred domestic ones in sincerity and renovation. Third, the satisfaction level with face had a statistically significant relationship to the importance of face and cosmetic brands, while the importance of face had to the beauty of the brand. In the interrelationship among facial images and the factors of brand personality, they had significant interrelationships, provided beauty and ruggedness, and reliability and ruggedness had no significant interrelationship.

• Journal of the East Asian Society of Dietary Life
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• v.22 no.1
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• pp.120-132
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• 2012

The purpose of this study was to investigate thet 5 dimensions of brand personality that could affect brand attachment, and actual and ideal self-congruence in the family restaurant. Also, this study investigated the effects of actual and ideal self-congruence on brand attachment. Questionnaires were given to a sample of customers who visited one of the 4 famous national brands of family restaurants in Daegu. A total of 332 questionnaires were analyzed with SPSS/$PC^+$and LISREL. There were four major empirical research findings. First, sincerity, competence, sophistication and ruggedness affected brand attachment. And second, sincerity, competence and sophistication affected actual self-congruence. Third, sincerity and sophistication affected ideal self-congruence. And fourth, actual self-congruence affected brand attachment. However, the excitement dimension of brand personality did not affect brand attachment,; dimensions of excitement and ruggedness did not affect actual self-congruence,; dimensions of excitement, competence and ruggedness did not affect ideal self-congruence. Also, ideal self-congruence did not affect brand attachment. Based on these findings, marketers of family restaurants were recommended to strengthen the dimensions of sincerity, competence, and sophistication, and to weaken the ruggedness dimension.

• Proceedings of the Korea Concrete Institute Conference
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• 2005.11a
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• pp.343-346
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• 2005

This study makes the performance evaluation of water-jet chipping through analysis of ruggedness of chipping surface. The ruggedness is mapped by 3D Laser Scanner and the results are also compared with the chipping surface by mechanical chipping. And the details of in-situ works is investigated for increasing interface adhesion between existing concrete and repairing mortar. Water-jet has good operation efficiency which is up $60m^2$ per hour when the chipping depth is 7cm and also has a large ruggedness about 1.65.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.53 no.7
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• pp.358-363
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• 2004

A new 600 V dual gate transistor employing thyristor action, which incorporates floating PN junction and trench gate IGBT, is proposed to improve the forward current-voltage characteristics and the short circuit ruggedness. Our two-dimensional numerical simulation shows that the proposed device exhibits low forward voltage drop and eliminates the snapback phenomena compared with conventional trench gate IGBT and EST The proposed device achieves high current saturation characteristics by separating floating N+ emitter and cathode. The proposed device achieves low saturation current value compared with conventional devices, and the short-circuit ruggedness is improved. The proposed device may be suitable for the use of high voltage switching applications.

• Journal of the Earthquake Engineering Society of Korea
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• v.9 no.1 s.41
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• pp.1-7
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• 2005

The optimal seismic retrofitting of NPP(Nuclear Power Plant) cabinet structures that contain seismic category 1 relays was studied in this paper. During earthquake event, the failure modes of relays are not appeared in form of structural failure, but are appeared in form of contact chatter of relay. Therefore, the retrofitting of cabinet has to be aimed at the reducing of the structural response, such as acceleration. In this study, the optimal characteristic values of dampers were searched by ${\mu}$-GA (micro-Genetic Algorithm) scheme for several installation patterns. To keep accuracy and efficiency of analysis, the structural models of cabinet were considered as a frame structure. The responses of structure were obtained inform of acceleration response spectra derived from the results of nonlinear time history analysis including damping nonlinearity. The objective function of the optimum procedure was constructed based on the maximum ratio of maximum spectral value and target GERS (General Equipment Ruggedness Spectra). The results show the good improvements of fitness for adequate retrofitting pattern. Especially, the improvements of fitness were remarkable when the values of damping exponents are low.

• Journal of Institute of Control, Robotics and Systems
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• v.13 no.8
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• pp.790-797
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• 2007

This paper proposes a new measure of cost function ruggedness in local optimization with DEAS. DEAS is a computational optimization method developed since 2002 and has been applied to various engineering fields with success. Since DEAS is a recent optimization method which is rarely introduced in Korean, this paper first provides a brief overview and description of DEAS. In minimizing cost function with this non-gradient method, information on function shape measured automatically will enhance search capability. Considering the search strategies of DEAS are well designed with binary matrix structures, analysis of search behaviors will produce beneficial shape information. This paper deals with a simple quadratic function contained with various magnitudes of noise, and DEAS finds local minimum yielding ruggedness measure of given cost function. The proposed shape information will be directly used in improving DEAS performance in future work.

• Journal of the Korea Safety Management & Science
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• v.10 no.4
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• pp.315-325
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• 2008

This study examines the effect of brand personality on consumer's attitude. Previous research has suggested that the greater the congruity between consumer personalities and brand personalities, the greater the preference for the brand. However, empirical explorations of this hypothesis revealed that the congruity between consumer personalities and brand personalities is limitedly related, if ever, to the preference for the brand. It is partly because of the views of the previous researchers who considered human personality as a uni-dimensional concept, and partly because of the lack of consensus regarding what brand personality really is. This study examines the relative effect of brand personality on company image. In this study, brand personality is represented by the 'Big Five' factors - Sincerity, Excitement, Competence, Sophistication and Ruggedness - which were suggested by Jennifer Aaker.

• Journal of Korea Society of Industrial Information Systems
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• v.24 no.5
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• pp.65-76
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• 2019

This research examines the effects of perceived design personality on consumer responses such as attitude toward products and purchase intention. Furthermore, the study analyzes if the design typicality moderates the effects of design personality on consumer responses. The research results found that when consumers are exposed to a typical design, they are more likely to perceive sincerity and ruggedness at a higher level. On the other hand, consumers tend to perceive a higher level of excitement and sophistication, as they are exposed to the atypical design. Besides, competence and ruggedness have positive effects on buying intention in the case of a typical design, while sincerity, excitement, and sophistication have positive impacts on buying intention in the case of an atypical design. Lastly, competence and ruggedness are found to have positive impacts on design attitude more in the typical design than in the atypical design, whereas sophistication showed positive impacts on design attitude more in the atypical design than in the typical design. Additionally, competence has more influence on product buying intention in the typical design and excitement has more effect on it in the atypical design.

• Journal of the Korean Society of Food Culture
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• v.26 no.2
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• pp.142-150
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• 2011

This study investigated and compared the brand personality of domestically run family restaurants with quick service restaurants. Information was elicited from respective patrons using self-administered questionnaires which asked questions on recognizable brand characteristic and attributes of each restaurant through image maps. Data from the self-administrated questionnaires were collected and analysed using comparative statistical analysis, including frequency, t-test, chi-square, factor analysis, reliability analysis and correspondence analysis. Overall, patrons identified 5 factors which they used to rank individual restaurants; sophistication, competence, likeableness, trendiness, and ruggedness. Overall results showed the family restaurants that scored highly on likeableness and trendiness were Outback and TGIF. Furthermore, Vips was the only family restaurants that scored highly in ruggedness. In relation to quick service restaurants, Lotteria scored highest for competence while McDonalds and Burger King scored best for sophistication. Limitations and future research directions are also discussed.