• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.1
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• pp.127-138
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• 1997

In this paper, we study new HOL-LJ scheme to guarantee the QoW of low priority cell with simple hardware which is not realizable in previously proposed HOL and HOL-PJ. the performance of the proposed scheme is evaluated by analysing an equivalent /M/M/1/N queuing system. In case of using the proposed scheme, we confirmed that good performance compared with HOL-PJ through simpulation and mathematical analysis. We also applied HOL-LJ algorithm to convetional Dual Buffer and Partial Buffer, and we analyzed the performance through computer simulation.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.16 no.1 s.106
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• pp.66-74
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• 2006

This study aimed to evaluate the room acoustical performances of multi-purpose halls, surveying the architectural features and analysing the acoustical characteristics by measurements. In addition, adjectives appropriate for the evaluation of the room acoustical performance in multi-purpose halls were determined through the method of questionnaire survey and subjective evaluation through psycho-acoustic experiment. The results from the experiment were analysed by the correlation analysis and the factor analysis, consequently useful adjectives for the evaluation of acoustical performances in multi-purpose halls were determined depending on the types of performance.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.7
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• pp.49-58
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• 2020

This paper examines the impact of mergers on the financial performance of the Jordanian banking sector. This paper applies the financial approaches in analysing the effects of mergers on Jordanian banks' performance for two the periods: four years pre-merger and four years' post-merger for the period from 2001 to 2009. The sample of the study solely contains the case of the merger of the Jordan Ahli Bank (AHLI bank) with Philadelphia Bank in 2005. Data are tested for normality using the Shapiro-Wilk Test and Kolmogorov Smirnov test. The financial ratios and a statistical technique as a Mann-Whitney U test were used to assess the significant differences in the financial performance of the selected banks pre- and post-merger by investigating the performance-related financial ratio groups that are expressed by leverage, liquidity, efficiency, and cash flow ratio. The results show that there is an insignificant improvement in the ratios of AHLI bank in the period after the merger, except for the superior result provided by this study indicating that the leverage ratios improved significantly. The reason for the insignificant improvement in financial ratios may be that the post-merger period corresponds to the period of the global financial crisis that began in 2007.

• Journal of Families and Better Life
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• v.33 no.4
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• pp.19-32
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• 2015

The purpose of this study is to examine the influence of the organizational characteristic and workers characteristics of Family Business Organization on its Business Performance. The subjects of this study were workers of healthy family support centers and multicultural family support centers. A survey was conducted from July 30th to September 30th. A total 372 materials were used for analysis of final data and SPSS(Statistical Package for the Social Sciences) WIN 18.0 program was employed in analyzing the collected data. As the result of analysing the effect of organizational characteristics and culture and characteristics of workers on business performance through hierarchical regression analysis, higher performance was achieved when the agency's organizational culture has the characteristics of a developed culture, and when the operating body is a school principal corporation rather than a non-profit corporation, and in the city rather than farming town, having enough information and external resources at the center, and when the job satisfaction of workers are high, and when organizational culture is more hierarchical. There were difference in the result of analysing the effect of organizational characteristic and culture and characteristic of workers on business performance. The level of service and business value of Family Service Organization was higher when the agency's organizational culture has the characteristics of a developed culture, hierarchical culture and agreement culture, and when operating body is a school principal corporation rather than a non-profit corporation, having enough information and external resources at the center, and the administrative skills of workers are higher. Business volume is increased when the operating body is a school principal corporation rather than a non-profit corporation, and in the city rather than farming town, and when the agency's organizational culture has the characteristics of hierarchical culture and agreement culture, having enough external resources at the center, and the practicing ability of workers are higher. When it comes to business efficiency, it is increased when the agency's organizational culture has the characteristics of developed culture and the job satisfaction of workers are high, having enough external and financial resources at the center. Therefore we will need to enhance business performance through improved management and job satisfaction of employees in organizational culture.

• Journal of the Korea Society of Computer and Information
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• v.19 no.9
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• pp.169-176
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• 2014

This study is to suggest the theoretical and policy implications by analysing the moderating effects of trust for senior in the causal relationships among the research variables. For this study, 273 of the local public servants were sampled and surveyed. The results of this study showed that local public servants' performance oriented values affect job attitude through their acceptance for performance management system. And this study showed that trust in the leader moderates the relationships among individual orientation, performance orientation and job attitude. This study suggested some theoretical and practical implications on the base of the results.

• Journal of the Korea Society for Simulation
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• v.23 no.3
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• pp.33-40
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• 2014

Drifter is equipment which is hard to localize. Performance of prototype hasn't performed well compared to product of leading companies even though advanced foreign firm's product were dead copied. This study shows cases of approaching the factor which produces performance gap through drifter hydraulic analysis model which is core component of rock drill. Progression of procedure is following. 1) Securing reliability of the analysis model by comparing impact test result with analysis result. 2) Drawing a graph which indicates performance gap between prototype and drifter of advanced foreign firm by using analysis model. 3) Approaching the factor which produces performance gap with analysing variable of the analysis model. Software used for this analysis is SimulationX.

• Journal of Technology Innovation
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• v.15 no.2
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• pp.177-209
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• 2007

This work firstly aims to analyse the balance between tangibles and intangibles as well as among human capital, structural capital and relational capital of evaluation indicators for the research institutes in science and technology sector conducted in 2006, by adopting intellectual capital model. The research question of this work comes from that while the R&D activity can produce both tangibles and intangibles, there have no been methodologies to relevantly measure and rationally judge these, in particular, intangible performance. The result shows that the institute evaluation system in 2006 had given more weight on tangibles and structural capital than intangibles and other intellectual capitals such as human capital and relational capital, in comparison to the past evaluation system, even though, in principle, the current evaluation system has to deal with the intangible research performances as well as tangible ones in economic, social and cultural perspective. Finally, based on these analysis, I will try to suggest some policy directions for overcoming the deficits of indicators in institute evaluation system.

• Structural Monitoring and Maintenance
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• v.2 no.1
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• pp.49-64
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• 2015

This paper presents a method for assessing the risk of wave run-up and overtopping of existing coastal defences and for analysing the probability of failure of the structures under future hydraulic conditions. The recent UK climate projections are employed in the investigations of the influence of changing environments on the long-term performance of sea defences. In order to reduce the risk of wave run-up and overtopping caused by rising sea level and to maintain the present-day allowances for wave run-up height and overtopping discharge, the future necessary increase in crest level of existing structures is investigated. Various critical failure mechanisms are considered for reliability analysis, i.e., erosion of crest by wave overtopping, failure of seaside revetment, and internal erosions within earth sea dykes. The time-dependent reliability of sea dykes is analysed to give probability of failure with time. The results for an example earth dyke section show that the necessary increase in crest level is approximately double of sea level rise to maintain the current allowances. The probability of failure for various failure modes of the earth dyke has a significant increase with time under future hydraulic conditions.

• Journal of the Korean Society of Safety
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• v.31 no.6
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• pp.19-24
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• 2016

One of key parameters on lightning protection system design of electric, information and communication system is grounding impedance. Earth impedance includes numerous information about earthing performance of grounding system. This paper suggests grounding impedance measuring device which is comprised of wideband current source, voltage and current measuring components. We used IQ Demodulation to measure more accurate phase difference of voltage and current. The range of frequency is up to 1 MHz that is IEEE defined as the range of lightning surge. We compared developed grounding impedance measuring device with existing one to test its performance, and we used grounding system while we implemented measurement and analysing by using fall of potential method IEEE Std.81 proposed.

• 연구논문집
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• s.32
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• pp.103-111
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• 2002

In this study, the crashworthiness of KHST has been evaluated by analysing a nonlinear spring/bar-damper-mass model of 1-dimensional collision dynamics. The numerical results show that KHST can easily absorb kinetic energy at lower impact force and acceleration in heavy collisions, when compared with KTX. Also, in a Light collision like a traint-to-train accident at lower speed under 8 kph, the carbody and components of KHST can be protected without any damage except the energy absorbing tube to be replaced easily. However, KTX may be much damaged in the light collision because there is no energy absorbing tube. In conclusion, the crashworthy performance of KHST has been much improved than that of KTX, although there are something to be improved for a better crashworthy performance