• Journal of KIISE:Computing Practices and Letters
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• v.16 no.2
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• pp.227-231
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• 2010

The TFRC is a congestion control mechanism which supports the requirements of video streaming applications and controls its sending rate by using the information such as loss event rate and RTT (round-trip time). However, TFRC has a performance degradation in wireless networks because it performs congestion control by judging all the losses occurred in wireless network as a congestion signal. In this paper, we propose new loss discrimination mechanism which is using ECN in order to solve the performance degradation of TFRC. Through the results of simulation, we proved that the proposed mechanism can improve the performance of TFRC.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.2 no.6
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• pp.333-351
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• 2008

Transmission control protocols have to overcome common problems in wireless networks. TCP employing both packet loss discrimination mechanism and available bandwidth estimation algorithm, known as the good existing solution, shows significant performance enhancement in wireless networks. For instance, TCP New Jersey which exhibits high throughput in wireless networks intends to improve TCP performance by using available bandwidth estimation and congestion warning. Even though it achieves 17% and 85% improvements in terms of goodput over TCP Westwood and TCP Reno, respectively, we further improve it by exploring maximized available bandwidth estimation, handling bit-error-rate error recovery, and effective adjustment of sending rate for retransmission timeout. Hence, we propose TCP NJ+, showing that for up to 5% packet loss rate, it outperforms other TCP variants by 19% to 104% in terms of goodput when the network is in bi-directional background traffic.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.5
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• pp.505-513
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• 2021

Poverty is often referred to as a phenomenon of scarcity, inadequacy or instability of income. Besides, poverty can also cause health issues, exacerbate social problems, leading to isolation, discrimination and loss of a bright future. Lately, the role of zakat (the compulsory giving of a set proportion of one's wealth to charity) as a useful tool in combating poverty has been highlighted since zakat collected will be distributed specifically to the poor and needy groups. This paper seeks to assess the role of zakat in combating poverty among recipients. A questionnaire was distributed to 300 participants selected from the list of recipients who received assistance from Zakat institutions. A cluster random sampling has been utilized to select sampling from the target population. The data were analyzed using SPSS to provide descriptive analysis. Past evidence has shown how zakat has able to transform the recipient into a payer especially through education or business assistance. Proper management of zakat institution is seen as a powerful mechanism to facilitate community development and to strengthen the Muslim economy. Results show the importance of zakat in the effort to eradicate poverty and further able to improve the asnaf's quality of life.