• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제16권2호
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• pp.227-231
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• 2010

TFRC(TCP Friendly Rate Control)는 비디오 스트리밍 응용의 요구 조건을 만족시키는 혼잡제어 기법으로써, 손실 사건률과 왕복 지연 시간 등의 정보를 이용하여 전송률을 조절한다. 그런데 TFRC는 무선 네트워크에서 발생하는 손실을 모두 혼잡 손실로 판단하고 혼잡제어를 수행하기 때문에 성능이 저하되는 문제가 있다. 본 논문에서는 이를 해결하기 위해 ECN(Explicit Congestion Notification) 정보를 이용하는 새로운 손실 구별 기법을 제안하였다. 실험을 통해 제안한 기법이 무선 네트워크에서 TFRC의 성능을 향상시킴을 확인하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제2권6호
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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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• 제8권5호
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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.