Browsing by Author "Narayan, S"

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Embargo
Performance test of IEEE 802.11 ac wireless devices
(IEEE, 2015-01-08) Narayan, S; Jayawardena, C; Wang, J; Ma, W; Geetu, G
With the wireless technologies being widely used, it is for sure that all types of wireless networking will become more and more popular now and in the near future. Therefore, measurement-based performance evaluation of different wireless network standards and traffics is becoming very important. In this research paper, the wireless local area network performance differences between IEEE 802.11n and IEEE 802.11ac technologies of both IPv4 and IPv6 on two Windows 7 operating system computers which been implemented 802.11ac network devices is investigated. The results indicated that both IPv4 and IPv6 802.11ac throughput is higher than 802.11n, both ac and n IPv6 mode has lower jitter than IPv4's. The delay and drop rate metrics were also be measured.
Open Access
State-of-the-Art Graphene Synthesis Methods and Environmental Concerns
(Hindawi Limited, 2023-02-02) Edward, K; Mamun, K; Narayan, S; Assaf, M; Rohindra, D; Rathnayake, U
Graphene, a 2D sp2 hybridized carbon sheet consisting of a honeycomb network, is the building block of graphite. Since its discovery in 2004, graphene's exceptional electronic and mechanical properties have peaked interest in various applications. However, the inability to mass produce high-quality graphene affordably currently limits the practical application of the material. Researchers are continuously working on advancing graphene synthesis methods to alleviate these limitations. Therefore, this review looks at the overview of established graphene synthesis methods and characterization techniques, and then highlights an in-depth review of graphene production through flash joule heating. The environmental concerns related to graphene synthesis are also presented in this review paper.