• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 통신소사이어티 추계학술대회논문집
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• pp.15-19
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• 2003

In this paper, the bit error rate (BER) performance of the fast frequency hopping/M-ary frequency shift keying system using the clipper receiver is analyzed by using the characteristic function (CF) technique in the presence of n=1 band multitone jamming and additive white Gaussian noise environment. The CFs of the clipper receiver outputs are derived as a infinite series representation using Gamma function and Marcum's Q -function. The analytical results are validated with various simulation results. Performance comparisons with linear combining receiver are shown that the BER performance of the clipper receiver is much better than that of the linear combining receiver In addition, as the clipping level approaches to infinity, it is shown that the clipper receiver simply performs a linear combining without clipping and there exists an optimum value of diversity level (the number of hops per symbol) that maximizes the worst case BER performance of the clipper receiver.

• Steel and Composite Structures
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• 제20권2호
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• pp.337-355
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• 2016

Steel coupling beam in reinforced concrete (RC) coupled shear wall system is a proper substitute for deep concrete coupling beam. Previous studies have shown that RC coupled walls with steel or concrete coupling beam designed with strength-based design approach, may not guarantee a ductile behavior of a coupled shear wall system. Therefore, seismic performance evaluation of RC coupled shear wall with steel or concrete coupling beam designed based on a strength-based design approach is essential. In this paper first, buildings with 7, 14 and 21 stories containing RC coupled shear wall system with concrete and steel coupling beams were designed with strength-based design approach, then performance level of these buildings were evaluated under two spectrum; Design Basis Earthquake (DBE) and Maximum Considered Earthquake (MCE). The performance level of LS and CP of all buildings were satisfied under DBE and MCE respectively. In spite of the steel coupling beam, concrete coupling beam in RC coupled shear wall acts like a fuse under strong ground motion.

• 가정과삶의질연구
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• 제22권5호
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• pp.253-264
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• 2004

The objective of this study was to investigate the change of the level of the performance of family rituals and socialization of them, and to compare the change of the attitudes between daughter and mother generation. Research data were collected in 1992 and 2002 from families living in Seoul. Housewives and university students from these families completed the questionnaires. Major findings were as follows: Most of the family performed the birthday parties, traditional rituals, and memorial days. The level of the performance of the birthday rituals, and rituals from western culture has increased for a decade. The socialization of the following family rituals is increasing: banquets for parents' 60th birthday, wedding anniversaries, employment ceremony, commencement ceremony. There was significant difference in the attitude between younger and older generations regarding performance of the family rituals between 1992 and 2002.

• 가족자원경영과 정책
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• 제5권2호
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• pp.69-85
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• 2001

The purpose of this study was to explore the effect of performance of living proprieties on family adaptability and self-esteem, centering on the married men and women residing in the city of Seoul. 220 respondents were randomly selected in July 2000 for the present research. The results of this study were as follows : First, the performance of living proprieties revealed a relatively high level and was shown a significant difference by sex, age, family type, religion, the number of children, experience of propriety education, value orientation, and the degree of communication. Second, family adaptability revealed a relatively high level and was shown a significant difference by family type, experience of propriety education, and the degree of communication. Self-esteem was shown a significant difference by the number of children and degree of communication. Third, background variable (age), the performance of living proprieties (communication manner, family decorum, social etiquette), and family adaptability had a significant effect on self-esteem. This implies that the performance of living proprieties rather than socio-demographic variables has a positive effect on self-esteem.

• 설비공학논문집
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• 제20권1호
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• pp.26-34
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• 2008

Heat recovery ventilator(HRV) is recommended to improve indoor air quarlity (IAQ) and energy conservation in apartment houses. Recently, in Korea, HRV is produced from many manufacturers. However, there have been not so many experiences to apply HRV in apartment houses and verification on the performance such as heat exchange efficiency, carry-over rate, internal leakage, etc. have not been carried out sufficiently. So in this study, fan performance, heat exchange efficiency, air leakage, internal exhaust leakage, external leakage and sound level of HRV were examined for selected HRV models under domestic and international standard. Results of performance test, there were need to improve latent heat exchange efficiency and sound level of HRV.

• The Journal of Asian Finance, Economics and Business
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• 제8권3호
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• pp.451-458
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• 2021

The objective of this research is to analyze the effect of bad credit and liquidity on bank performance with the mediation of capital adequacy. Data were provided by banking institutions listed on the Indonesia Stock Exchange from the period of 2011-2019. The analysis technique was PLS-SEM supported by an application named WarpPLS 6.0. The results of the research show that the effect of bad credit and liquidity on bank performance is not significant. A high level of bad credit is associated with a low level of bank performance. Bank earnings decline along with low profitability. This relationship is not significant because banks can still cover some proportions of bad credit through capital availability. Capital adequacy as an intervening variable has mediated partially the effect of bad credit and liquidity on bank performance. Besides, capital adequacy has a strong effect on credit distribution. Agency theory says that the owner of the fund (the savers of saving account, current account, deposit account) is called principal while the bank as the trusted institution to manage the fund is called an agent. If customers fulfill their duty, then bad credit never happens.

• 한국산업정보학회논문지
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• 제27권1호
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• pp.125-133
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• 2022

본 논문에서는 CEO의 여러 속성 중 내부성이 혁신 성과에 미치는 영향을 조사하였다. 미국 특허 데이터를 분석한 결과 내부에서 승진한 CEO가 외부에서 영입된 CEO 대비 더 많은 혁신성과 수준을 보인다는 것을 입증하였다. 또한, 내부성이 길수록 혁신 성과 수준이 크다는 사실을 발견하였다. 추가적인 조사 결과에 따르면, 내부성과 혁신 성과 사이의 관계는 첨단기술산업에서 더 뚜렷한 것으로 드러났다. 이러한 연구결과는 기업의 차기 CEO 선택에 시사점을 제공할 수 있을 것으로 기대된다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2009년도 추계학술발표대회
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• pp.917-918
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• 2009

This study evaluated the level of performance improvement in the form of a simulated experiment by adding fixed node in the middle of the network as a way to improve mobile ad.hoc network performance. The result showed that the performance level was much higher when fixed node was used together than when mobile node was used only, and the comparison of the mobile speed of mobile node also showed that use of fixed node together had higher performance. Moreover, the evaluation in accordance with the number of fixed node showed that more number of fixed node had shorter time delay. Further study following this on how many fixed node should be added on the ad.hoc network will ensure establishment of more reliable ad.hoc network.

• 산경연구논집
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• 제5권2호
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• pp.13-20
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• 2014

Purpose - The purpose of this study is to empirically investigate the impact of capital structure on firm performance. Research design, data, and methodology - This study examined the impact of capital structure on the performance of cement companies listed on the Karachi Stock Exchange during the period 2009-2013. The authors hypothesize that there is a negative relationship between capital structure and firm performance. To examine the association, the authors run a Pearson correlation and multiple regression analysis. Results - Results reveal a strong negative relationship between debt to asset and firm performance variables (GPM, NPM, ROA, and ROE). Further, there is a positive relationship between debt to equity and firm performance variables (GPM and NPM), anda negative relationship between debt to equity and firm performance variables (ROA and ROE). Moreover, capital structure variables significantly impact firm performance. Conclusions - This study concluded that financial analysts and managers should emphasize on the optimal level of capital structure and efficient utilization and allocation of resources to achieve the targeted level of productive efficiency in business.

• 한국컴퓨터정보학회논문지
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• 제4권4호
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• pp.199-208
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• 1999

본 연구의 목적은 우리나라 제조기업을 대상으로 경영특성 및 경영성과에 있어서 업종집단별로 유의한 차이가 있는지 여부와 업종집단에 따라 경영성과가 높은 기업군과 낮은 기업군간 경영특성에 있어서 차이가 있는지의 여부를 살펴봄으로서 동일한 업종에 속하는 기업들간의 경영성과의 차이 발생 원인을 규명하고자 하였다. 연구결과에 의하면 업종간 경영특성 규모와 경영성과에 영향을 미치는 경영특성에 있어서 차이가 존재하는 것으로 나타났다. 한편 업종별로 경영성과가 우수한 기업군과 열등한 기업군간의 경영특성에 있어서도 유의한 차이가 존재하는 것으로 나타났다. 연구 결과를 종합하여 살펴보면 업종에 따라 특정 경영특성에 대한 과다한 혹은 과소한 투자가 경영성과 차이를 유발하는 것으로 나타났다. 이러한 연구 결과는 각 업종의 기업들이 추가적인 투자계획 수립 방향을 제시하여 줄 수 있으며, 경영성과 개선방안을 제시하여 준다는 점에서 그 의의를 찾을 수 있을 것이다.