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Cross Layer QoS Aware Scheduling based on Loss-Based Proportional Fairness with multihop CRN

Computer Systems Science & Engineering 2022年第9期42卷 1063-1077页

作者： K.Saravanan g.m.tamilselvan A.Rajendran Department of ECE KPR Institute of Engineering and TechnologyCoimbatoreIndia Department of IT Sri Krishna College of TechnologyCoimbatoreIndia Department of ECE Karpagam College of EngineeringCoimbatoreIndia

As huge users are involved,there is a difficulty in spectrum allocation and scheduling in Cognitive Radio Networks(CRNs).Collision increases when there is no allocation of spectrum and these results in huge drop rate and network performance *** solve these problems and allocate appropriate spectrum,a novel method is introduced termed as Quality of Service(QoS)Improvement Proper Scheduling(QIPS).The major contribution of the work is to design a new cross layer QoS Aware Scheduling based on Loss-based Proportional Fairness with multihop(QoSAS-LBPFm).In medium Access Control(mAC)multi-channel network environment mobile nodes practice concurrent broadcast between several *** the advantage of introduced cross layer design,the real-time channel conditions offered by Cognitive Radio(CR)function allows adaptive sub channel choice for every *** optimize the resources of network,the LBPFm adaptively plans the radio resources for allocating to diverse services without lessening the quality of *** obtained from simulation proved that QoSAS-LBPFm provides enhanced QoS guaranteed performance against other existing QIPS algorithm.

关键词： Network efficiency distributed architecture mobile ad hoc networks Cognitive Radio Networks(CRNs) QoS improvement scheduling

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Location Prediction for Improved Human Safety at Complex Environments

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Computers, materials & Continua 2022年第6期71卷 5219-5234页

作者： S.g.Siddharth g.m.tamilselvan C.Venkatesh Department of Electrical and Electronics Engineering Angel College of Engineering and TechnologyTirupurTamilnaduIndia Department of Electronics and Communication Engineering Sri Krishna College TechnologyCoimbatoreTamilnaduIndia Department of Electronics and Communication Engineering KGISL Institute of TechnologyCoimbatoreTamilnaduIndia

In underground operation,primary consideration is *** recent decades,for minimizing accident and for preventing major economic losses and casualties,wireless sensors are used by various large mineral countries through early *** Improved DV-Hop Localization Algorithm(IDVHLA)is used in existing works for doing ***,accurate anchor node detection is impossible in existing works with the malicious nodes presence,where there won’t be any accurate sharing of anchor node’s location *** case of emergency situation,faster communication is a highly complex one.A technique calledmodified Distance Vector Hop based multipath Routing Protocol(mDVHmRP)is introduced in this proposed research work for resolving *** this work,to detect anchor node position,a modified Distance Vector Hop technique is *** research work considers time taken and session time for computing neighbour node’s presence in addition to hop count *** nodes presence can be avoided by considering session time in neighbour node presence *** alert message are send by people in emergency crisis to sever in initial *** Dynamic Source Routing(DSR)routing protocol is used for doing immediate route path *** case of route path failure,for ensuring uninterrupted communication and faster communication,this work introduces amulti path *** distance vector hop technique is used for predicting anchor node location information and predicted information will be *** NS2 simulation environment,overall evaluation of this research work is carried *** compared with available techniques,localization accuracy is enhanced by proposed technique as proven in experimental results.

关键词： Distance vector hop uninterrupted communication multipath routing anchor node localization

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Pouteria campechiana leaf extract and its bioactive compound myricitrin are mosquitocidal against Aedes aegypti and Culex quinquefasciatus

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Asian Pacific Journal of Tropical medicine 2019年第7期12卷 321-328页

作者： Raju Sangeetha tamilselvan Pratheeba Chinnasamy Ragavendran Devarajan Natarajan Natural Drug Research Laboratory Department of Biotechnology Periyar University

Objective: To test the mosquitocidal potential of leaf extracts of Pouteria campechiana prepared with different solvents and elucidate the structure of an isolated mosquitocidal compound. methods: The leaf extracts of Pouteria campechiana prepared with three solvents(petroleum benzene, ethyl acetate and acetone) and potential bioactive fractions were tested against various stages of Aedes aegypti and Culex quinquefasciatus by using the WHO protocols, and the chemical profile and its functional groups were identified by gC-mS and Fourier transmissioninfrared spectroscopy(FT-IR). The structure of bioactive compound was characterized by nuclear magnetic resonance(NmR) spectral technique. Results: The preliminary phytochemical results revealed the presence of alkaloids, amino acids, flavonoids, quinones, saponins, steroids, tannins, and terpenoids in the acetone extract. A significant toxic potential was observed in the acetone extract against both Aedes aegypti and Culex quinquefasciatus mosquitoes. The acetone extract exhibits remarkable larvicidal(LC50: 12.232 μg/mL and LC90: 63.970 μg/mL), pupicidal(LC50: 18.949 μg/mL and LC90: 167.669 μg/m L) and adulticidal(LC50: 20.689 μg/mL and LC90: 72.881 μg/mL) effects against Aedes aegypti. Furthermore, the same extract was subjected to isolation of bioactive compound by gCmS and FT-IR analysis. gC-mS results showed the presence of 5 major compounds, and octacosane(18.440%) was detected as the predominant compound. The FT-IR result of acetone extract demonstrated the presence of various functional groups like alkanes/alkynes, ester, aromatic and amides. The NmR spectrum results of isolated compound were well matched to glycoside linked flavonoids. Based on the chromatography and spectral techniques the isolate molecule was identified as myricitrin by FT-IR and nuclear magnetic resonance spectral data. Conclusion: The isolated compound myricitrin possesses a significant toxic effect in all stages of Aedes aegypti and Culex qu

关键词： Pouteria campechiana myricitrin Aedes aegypti Culex quinquefasciatus mosquitocidal

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