• Title/Summary/Keyword: Important Performance Analysis

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Analysis of Packet Delay in IEEE 802.11 Wireless LAN (IEEE 802.11 WLAN에서 패킷지연시간 분석)

  • Lim, Seog-Ku
    • Proceedings of the KAIS Fall Conference
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    • 2009.12a
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    • pp.989-993
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    • 2009
  • Wireless LAN(WLAN) is a rather mature communication technology connecting mobile terminals. IEEE 802.11 is a representative protocol among WLAN technologies. With the rising popularity of delay-sensitive real-time multimedia applications(video, voice and data) in IEEE 802.11 wireless LAN, it is important to study the MAC layer delay performance of WLANs. In this paper, performance for packet delay that recently have been proposed schemes is analysed in wireless LAN and proved performance results via simulation.

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Performance Analysis of Emergency Shut-Off Safety Valve (긴급차단용 안전밸브의 성능해석)

  • Song, H. Y.;Park, K. A.;Ko, S.
    • 유체기계공업학회:학술대회논문집
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    • 2001.11a
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    • pp.413-418
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    • 2001
  • Emergency shut-on valve was developed to shut off natural gas at the front of a gas meter in the house. The shut-off flow rate and differential pressure of this valve was controlled by adjusting the distance between the spool and magnet. Also the spool shape was an important factor in the performance of this valve. The experimental and computational results will be useful for the design having better performance.

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백화점의 인적서비스 아웃소싱(outsourcing) 동기와 성과에 관한 연구

  • 이철우;김창호
    • Journal of Distribution Research
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    • v.4 no.1
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    • pp.31-49
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    • 1999
  • The present paper discusses the current status of outsourcing of service encounter in department stores. We attempt to find if there is any significant relationship between outsourcing motive and business performance. The 30 department stores under analysis show that they vary in the degree to which they appreciate the necessity of outsourcing and also the which they employ outsourcing. It is also found that firm size influences the portion of outsourcing. The two main motives of outsourcing seem to be (i) cost saving and (ⅱ) better customer satisfaction. We find that the latter plays a more important role. However, there seems to be no significant connection between outsourcing and performance and between motives of outsourcing and performance.

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Analysis of Robust Control Algorithms for DVDR Servo using Fixed-Point Arithmetic (고정 소수점 연산을 이용한 DVDR 서보의 강인 제어 알고리즘 해석)

  • 박창범;김홍록;서일홍
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.259-259
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    • 2000
  • In the recent, the size of hardware is smaller and the structure is simpler, without reducing the performance of the digital controller. Accordingly, the fixed-point arithmetic is very important in the digital controller. This paper presents simulation to apply the robust control algorithms to DVDR servo controller using the floating-point and fixed-point arithmetic from the matlab. Also, it analyses and compares the performance of control algorithms in the each of point calculation and presents a method for improvement of drop in the performance, quantization error and overflow/underflow from using the fixed-point arithmetic

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Performance Analysis for Base Station Controller in Mobile Communication Networks

  • Lim Seog-Ku
    • International Journal of Contents
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    • v.1 no.2
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    • pp.13-17
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    • 2005
  • Base Station Controller which belongs to IMT-2000(International Mobile Telecommunication - 2000) network has several types of structure for efficient control protocol. This difference of structure occurs two different protocols for call handling. Recently the need of IMT-2000 is highly increasing, so it is important to analyze the performance of processors and IPC(Inter-Processor Communication) module with structure of BSC and protocol difference. This paper presents the performance comparison of different types of BSC in view of processor utilization, waiting time, queue length and QoS(Quality of Service) through the simulation model.

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Factors Affecting R&D Performance of Korean Electronics Part Companies (우리기업 R&D 성과의 영향요인: 전자부품기업을 중심으로)

  • Kim, Jeong-Hwa;Jo, Seong-Bok;Lee, Seong-U;Jeong, Seon-Yang
    • Proceedings of the Technology Innovation Conference
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    • 2004.02a
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    • pp.202-221
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    • 2004
  • Technology is the most important determination factor on firm`s competitiveness. It helps firms to secure sustainable competitive advantages. Therefore Korean electronics part firms have increased their R&D investment since the 1990s. But their R&D management capabilities seem to be low level. Empirical study was undertook to verify factors that effect on R&D performance with enhancing R&D management capabilities. To accomplish the purpose, data collected valid samples in Seoul and Kyunggi Province. Using SPSSWIN 10.0package, regression analysis was used to verify hypotheses. This study verify that important factors of 4th R&D generation effect on improving R&D performance. Therefore Korean electronics firms must learn advanced firms in developed countries. Based on learning and accumulating R&D management capabilities, Korean electronics part firms should establish their firm-specific R&D management model.

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Analyses of Network Performance Based on VPN Protocols (VPN 프로토콜에 기반한 네트워크 성능 분석)

  • Jang, Chang-Whan;Lee, Min-Suk;Jo, Sung-Ho;Kim, Jung Tae
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2016.05a
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    • pp.589-590
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    • 2016
  • Virtual Private Network (VPN) is commonly used in business situations to provide secure communication channels over public infrastructure such as Internet. This is important matters because these networks can be set-up with a lower cost of ownership compared to other means of securing communications. VPN is a proven technology that does provide security strong enough for business use. However, performance of these networks is also important in that lowering network and server resources can lower costs and improve user satisfaction. We analyzed network performance analysis of VPN protocols.

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A Case Study on Performance Evaluation of which R5 MSC dealing call type in WCDMA System (WCDMA MSC 시스템 호 유형 별 성능 분석 사례)

  • Ahn, Sung-Jin;Shin, Jae-Ho
    • 한국정보통신설비학회:학술대회논문집
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    • 2008.08a
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    • pp.495-499
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    • 2008
  • Last year UMTS (UMTS: Universal Mobile Telecommunication System) 3G service started and these days 3 its service subscribers sharply increased. Now totally we have been increasing 13 million subscribers, every month 0.8 million people join 3G Service. MSC (Mobile Switching Center) is most important equipment in 3G system, so we call it 'core' network. Higher capacity MSC required to accommodating 1 million subscribers. It is very important whether MSC can accommodate maximum subscriber or not. So systematic analysis, reliable test results are required. This article presents WCDMA MSC performance evaluation case. This would be some direction for designing and developing some communication equipment. This Case Study demonstrates our MSC system performance.

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Effects of Marketing Communication Capabilities on the link between Corporate Social Responsibility on Firm Value: Observations from the Service Industry

  • Kim, YongHee
    • Asia Marketing Journal
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    • v.20 no.1
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    • pp.1-21
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    • 2018
  • An increasing number of studies have examined the effects of corporate social responsibility (CSR) activities on corporate financial performance (CFP) in the service industry. However, the extant literature does not provide comprehensive insights into the conditions on which the CSR-CFP link relies. In this study, firms' marketing communication capability (MCC) is introduced as an important contingency variable, which determines the effects of CSR on the corporate financial performance, in the context of restaurant businesses. Multiple year data on the spending of public restaurant chains on different media are collected, and MCC is subsequently measured using the data envelope analysis. Then, a test is conducted to prove whether MCC moderates the relationship between CSR and firm financial performance. The empirical results support the hypothesis that MCC strengthens the effect of CSR on CFP. Through the findings, this research provides several interesting and important implications to the literature and managers of service firms.

Comparative analysis of the pig gut microbiome associated with the pig growth performance

  • Jun Hyung Lee;San Kim;Eun Sol Kim;Gi Beom Keum;Hyunok Doo;Jinok Kwak;Sriniwas Pandey;Jae Hyoung Cho;Sumin Ryu;Minho Song;Jin Ho Cho;Sheena Kim;Hyeun Bum Kim
    • Journal of Animal Science and Technology
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    • v.65 no.4
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    • pp.856-864
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    • 2023
  • There are a variety of microorganisms in the animal intestine, and it has been known that they play important roles in the host such as suppression of potentially pathogenic microorganisms, modulation of the gut immunity. In addition, the gut microbiota and the livestock growth performance have long been known to be related. Therefore, we evaluated the interrelation between the growth performance and the gut microbiome of the pigs from 3 different farms, with pigs of varied ages ready to be supplied to the market. When pigs reached average market weight of 118 kg, the average age of pigs in three different farms were < 180 days, about 190 days, and > 200 days, respectively. Fecal samples were collected from pigs of age of 70 days, 100 days, 130 days, and 160 days. The output data of the 16S rRNA gene sequencing by the Illumina Miseq platform was filtered and analyzed using Quantitative Insights into Microbial Ecology (QIIME)2, and the statistical analysis was performed using Statistical Analysis of Metagenomic Profiles (STAMP). The results of this study showed that the gut microbial communities shifted as pigs aged along with significant difference in the relative abundance of different phyla and genera in different age groups of pigs from each farm. Even though, there was no statistical differences among groups in terms of Chao1, the number of observed operational taxonomic units (OTUs), and the Shannon index, our results showed higher abundances of Bifidobacterium, Clostridium and Lactobacillus in the feces of pigs with rapid growth rate. These results will help us to elucidate important gut microbiota that can affect the growth performance of pigs.