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Fuzzy-Based Dynamic Distributed Queue Scheduling for Packet Switched Networks

Journal of computer Science & Technology 2013年第2期28卷 357-365页

作者： chollette c.chude-olisah Uche A.K.chude-Okonkwo Kamalrulnizam A.Bakar Ghazali Sulong Faculty of computing Universiti Teknologi Malaysia Wireless communication center Universiti Teknologi Malaysia

Addressing the problem of queue scheduling for the packet-switched system is a vital aspect of congestion control. In this paper, the fuzzy logic based decision method is adopted for queue scheduling in order to enforce some level of control for traffic of different quality of service requirements using predetermined values. The fuzzy scheduler proposed in this paper takes into account the dynamic nature of the Internet traffic with respect to its time-varying packet arrival process that affects the network states and performance. Three queues are defined, viz low, medium and high priority queues. The choice of prioritizing packets influences how queues are served. The fuzzy scheduler not only utilizes queue priority in the queue scheduling scheme, but also considers packet drop susceptibility and queue limit. Through simulation it is shown that the fuzzy scheduler is more appropriate for the dynamic nature of Internet traffic in a packet-switched system as compared with some existing queue scheduling methods. Results show that the scheduling strategy of the proposed fuzzy scheduler reduces packet drop, provides good link utilization and minimizes queue delay as compared with the priority queuing （PQ）, first-in-first-out （FIFO）, and weighted fair queuing （WFQ）.

关键词： fuzzy logic based decision method priority queue limit queue scheduling

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chemical composition of Gossypium herbaceum linn and its Antioxidant, Antibacterial, cytotoxic and Antimalarial Activities

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clinical complementary Medicine and Pharmacology 2021年第1期1卷 68-76页

作者： Rotimi Abisoye Larayetan Gideon Ayeni Abdulrazaq Yahaya Abayomi Ajayi Sunday Omale Umar Ishaq Dauda Joseph Abiodun c.ijioke olisah Julius Aigbogun Swesme Enyioma-Alozie Department of chemistry Kogi State UniversityPMB 1008AnyigbaKogi StateNigeria Department of Pure and Applied chemistry University of Fort Hare Alice 5700South Africa Department of Biochemistry Kogi State UniversityPMB 1008AnyigbaKogi StateNigeria Department of Biochemistry School of Life SciencesUniversity of KwaZulu-NatalWestville CampusDurban 4000South Africa Department of Anatomy Faculty of Basic Medical SciencesCollege of Health SciencesKogi State University AnyigbaPMB 1008AnyigbaKogi StateNigeria Botany Department Institute for Costal and Marine ResearchNelson Mandela UniversityPort Elizabeth 6031South Africa Jacio Environmental Limited 3 Airoboyi EstatesKM 2RefineryRefinery RoadEffurunDelta StateNigeria Department of Anatomy Faculty of Basic Medical SciencesBaze UniversityPlot 686Cadastral Zone C 00Jabi Airport Road Bypass(Ring Road)Behind National Judicial InstituteAbujaNigeria

Background:Gossypium herbaceum(***),a plant commonly found in the wild in Nigeria,is said to possess some therapeutic ***,there is a dearth of information on its chemical ***,there is a need to investigate its therapeutic ***:To investigate the qualitative and quantitative phytochemical components of the leaf extracts of ***,as well as its antioxidant,antimalarial and cytotoxic ***:Gas chromatography-mass spectrometry(Gc-MS)analysis was used to determine the components of ethanol and hexane extracts of *** leaf while 2,2-diphenyl-1-picrylhydrazyl(DPPH)and nitric oxide assays were used to determine the antioxidant *** parasites viability was examined using parasite lactate dehydrogenase(pLDH)technique and HeLa cell was used for the cytotoxicity ***:Bioactive compounds identified in ethanol and hexane extracts of *** were 37 and 30 kinds,respectively,with major components as linoleic acid(36.10%and 33.82%),vitamin E(7.15%and 5.98%)and caryophyllene(4.21%and 5.08%).It also has tannins,saponins,alkaloids,flavonoids steroids,phenols and *** antibacterial test,significant inhibitory potentials against multidrug-resistant bacteria strains were *** vitro antioxidant potentials(Ic 50)of ethanol and hexane extracts were 3.33 and 4.12μg/mL for DPPH assays,and 3.87 and 5.00μg/mL for nitric oxide assays,*** activities(Ic 50)were 9.99 and 9.76μg/mL for ethanol and hexane extracts,***:*** leaf may provide novel plant-derived therapeutic agents,effective in treating infectious diseases arising from multiple drug-resistant bacteria and a target in the management of oxidative stress.

关键词： Antimalarial Antimicrobial Antioxidant Bioactive components MBc MBF Gc-MS Gossypium herbaceum

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