• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.10
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• pp.2269-2274
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• 2015

In this paper, the reduced size in horizontal sizes of the narrow band pass filter (BPF) with λg/4 short stub using S shaped folded coupling structure is presented. This BPF with narrow bandwidth show flexible bandwidth with variation of the position of the stubs using the Qe(external quality factor) without changing the impedance value. On the other hand, by replacing the horizontal quarter-wavelength transmission lines with the equivalent S shaped coupled line, the BPF with reduced the size of horizontal can be realized. The proposed BPF shows the insertion loss of 1.46 dB and the return loss of 16.5 dB with bandwidth of 3.4 % at the center frequency of 5.8 GHz, respectively.

• Journal of Distribution Science
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• v.22 no.5
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• pp.117-129
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• 2024

Purpose: This research aims to explore the ramifications of job stress on cabin crews within the air service distribution sector, specifically examining its impact on service quality through mediating variables such as job satisfaction and engagement during the pandemic era. Research design, data and methodology: The study is based on a sample size of 312 individuals, exclusively comprising cabin crews employed in the airline industry. Methodologically, Confirmatory Factor Analysis (CFA) and Structural Equation Modeling (SEM) were employed for statistical analysis. Results: The findings reveal that both performance evaluation and job responsibility exerted a significant impact on both job satisfaction and job engagement. Furthermore, job engagement demonstrated a substantial influence on service quality. However, in contrast, factors like unstable employment and the working environment showed no significant impact on either job satisfaction or engagement. Additionally, job satisfaction did not exert a significant influence on service quality. Conclusions: These insights will offer the valuable guidance to the airline industry in preparing for unforeseen external environments that may affect the industry. As the aviation sector navigates the challenges posed by the pandemic, understanding and addressing the intricate relationships among job stress, satisfaction, engagement, and service quality will be crucial for effective industry resilience and adaptation.

• Journal of the Korean Society of Clothing and Textiles
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• v.33 no.8
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• pp.1215-1226
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• 2009

This study classifies consumers according to apparel shopping values to find the differences of apparel attributes in accordance to shopping value segments between Korean and Chinese college students. College students from Seoul and Beijing participated in the study and a quota sampling method collected the data. Data from 504 questionnaires is used for the statistical analysis. A factor analysis through, Cronbach's alpha coefficient, ANOVA, and a post-hoc test are conducted. Two factors of apparel shopping values are classified (hedonic shopping values and utilitarian shopping values). Four segments of apparel shopping value were classified (hedonic shopping, low involvement shopping segment, high involvement shopping, and utilitarian shopping). Three factors of apparel attribute are classified (external attributes, internal/aesthetic attributes, and internal/quality attributes). The result indicate that high involvement shopping segments considered all the clothing attributes more importantly than the other three segments. Chinese respondents of hedonic shopping segments and high involvement shopping segments considered advertisements in terms of external attributes, assembly, and fit in terms of internal/quality performance attributes as more important than Koreans. Chinese respondents of low involvement shopping segments also considered assembly and fit in terms of internal/quality performance attributes as more important than Koreans. Korean respondents of utilitarian shopping segments had a special regard for design and color in terms of internal/aesthetic attributes but the Chinese had a special regard for assembly, fit, and ease of maintenance in terms of internal/quality performance attributes.

• Journal of The Korean Digital Architecture Interior Association
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• v.1 no.1
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• pp.59-66
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• 2001

The purpose of this study is to improve productivity of architectural space planning(A.S.P,) by computer system and to optimize ASP. A searching algorithm is the best way to slave optimized A.S.P. Because architectural design is too many various site situations and client's demands to specify the general solving methods. This method seek the best design case in all possibility and to be modeled as this; Seongbukgu's case that is city structure former times negative by in facilities utilization of the near street limit. But, case of Gangnamgu and Songpagu is thought that environment and utilization etc. of area life of old people are affinity with quality of life environment of old people when see that is using various area facilities using electric railway and a bus etc. actively. It is looked by the other that individual's special quality uses area facilities according to life partner's existence and nonexistence and family composition and existence and nonexistence of profession and distinction of sex. Show difference of external behavior according to public garden and market and supermarket and welfare facilities etc.'s location in dwelling environment of area and relation about facilities of area has been formed and old people and dwelling environment of area can know that is that do interaction. Environment that access about facilities may have to be easy, and can live that communicating closely with area's inhabitantses may have to consist so that old people may can run various external life.. Notions of the evaluated value is an profit(+) and expense(-) that decide design intention. To adapt real planning, 1. A raster type space cell has logical site informations. 2. To be evaluate various factor. 3. To reflect operator's design mind, they should add an extra weight on evaluated value.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 1999.05a
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• pp.307-312
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• 1999

A piezoelectric flextentional sonar transducer has been simulated using a coupled FE-BEM. The dynamics of the sonar transducer is modelled in three dimensions and is analyzed with external electrical excitation conditions. Different results are available such as steady-state displacement modes, underwater directivity patterns. It is shown that the present barrel-stave sonar transducer of the piezoelectric material produces flextentional displacements which could be related with higher output power, lower quality factor and more omnidirectional beam pattern than other types of sonar transducers.

• KIPS Transactions on Software and Data Engineering
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• v.6 no.9
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• pp.457-464
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• 2017

Indoor air quality analysis is conducted to understand abnormal atmospheric phenomena and the external factor affecting indoor air quality. By recording indoor air quality measurements periodically, we are able to observe patterns in air quality. However, it difficult to predict the number of potential parameters, set parameters for a given observation and find the coefficients. Moreover, the results are time-dependent. Thus to address these issues, we introduce a microchip capable of periodically recording indoor air quality and a model that estimates atmospheric changes based on time series data.

• International Journal of Quality Innovation
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• v.9 no.2
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• pp.99-117
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• 2008

High-tech industry has been the principal economic source for Taiwan in recent years. The characteristics of high-tech industries in Taiwan are changeable product markets, short product life cycles and high company attrition rate. In the globalization trend, the high-tech industry has gradually increased corporate competitiveness and reached the goal of sustainable operations through knowledge management, knowledge sharing and new product research and development. Firms have aggressively strengthened and integrated their internal and external resources and enhanced knowledge sharing to increase industry operational performance. Effectively strengthening the knowledge management operation and performance evaluation of knowledge sharing in Taiwan's high-tech industry has become a critical issue. In the selection of knowledge sharing Key Performance Indicators (KPI), this research divided the knowledge sharing indicators into representative strategic indicators such as organizational knowledge learning, organizational knowledge resources, organizational information capacity and organizational knowledge performance through screening using Factor Analysis. The characteristics of the constructs were interdependent. This research calculated and adjusted the correlation among the key performance knowledge sharing indicators using ANP and determined the relative weight of knowledge sharing.

• Design & Manufacturing
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• v.13 no.2
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• pp.22-29
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• 2019

This study conducted a research as to condensation heat transfer by using three types of flat micro multi-channel tubes with different processing of micro-fin and number of channels inside the pipes and different sizes of appearances. In addition, identical studies were conducted by using smoothing circular tubes with 5mm external diameter to study heat transfer coefficient. The condensation heat transfer coefficient showed an increase as the vapor quality and mass flux increased. However, each tube shows little differences compared to 400kg/m2s or identical in case the mass flux are 200kg/m2s and 100kg/m2s. The major reason for these factors is increase-decrease of heat transfer area that the flux type of refrigerant is exposed to the coolant's vapor with the effect of channel aspect ratio or micro-fin. In addition, the heat transfer coefficient was unrelated to the heat flux, and shows a rise as the saturation temperature gets lower, an effect that occurs from enhanced density. The physical factor of heat transfer coefficient increased as the channel's aspect ratio decreased. Additionally, the micro pin at the multi-channel type tube is decided as a disadvantageous factor to condensation heat enhancement factor. That is, due to the effect of aspect ratio or micro-fin, the increase-decrease of heat transfer area that the flux type of a refrigerant is exposed to the vapor is an important factor.

• Journal of Convergence for Information Technology
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• v.8 no.1
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• pp.215-225
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• 2018

The purpose of this is to understand critical roles of contact employees' organization citizenship behaviors (OCBs) in customers' evaluation of service quality. This paper examines the relationship of employees' OCBs with job satisfaction, trust in manager, and customer's perceived service quality in deluxe hotel. The empirical results show that contact employee' job satisfaction and trust in manager are significantly related to OCB and that their active engagement in OCB has a positive relationship with the perception of service quality. Although there exists a significant common method factor possibly influencing the strength of the relationship, this factor did not affect the overall pattern of significant relationship. Another notable finding indicates that, unlike a global OCB measure, path estimates in the relationship of job satisfaction and trust to OCB variable are not similar and suggests that the multiple facets of OCBs provide more detailed information than a global OCB.

• The Journal of the Korea institute of electronic communication sciences
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• v.3 no.4
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• pp.304-312
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• 2008

In this study, the performance analysis was divided into the public sector and private business sector. The four perspectives of the BSC performance analysis for the private business sector can be applied to all of the enterprises as there are Logical Linkages between the four Perspectives. However, these can not be applied in the same way to the public sector. There is no Logical Linkage between public sector and private sectors. Therefore, since there is no Logical Linkage, the KIX project of the public sector has a constrained condition. With the internal and external perspective views, the BSC of the KIX identifies the quality(operation) factor, user(customer) satisfaction factor, and economic costs effects(finance) factor. Based on the linkage model in both the internal and external perspective views and the BSC performance analysis of these views, a performance analysis model was developed and then performance results were analyzed of the whole KIX project.