WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7150

Browse

Filters

2012 - 20142

Settings

Access Right: Closed AccessPublisher: search.filters.publisher.Azerbaijan National Academy of Sciences

Search Results

Now showing 1 - 2 of 2
  • Article
    Modıfıed Mergıng Clusterıng And Backbone Formatıon Algorıthms For Mobıle Ad Hoc Networks
    (Azerbaijan National Academy of Sciences, 2012) Dağdeviren, Orhan; Çokuslu, Deniz; Erciyes, Kayhan; Erciyeş, Kayhan; Çokuslu, Deniz; Dağdeviren, Orhan; 03.04. Department of Computer Engineering; 03. Faculty of Engineering; 01. Izmir Institute of Technology
    Clustering and backbone formation are widely used techniques to manage the routing operation in mobile ad hoc networks (MANET)s. In this work, we provide algorithms to form a backbone that is highly resilient to mobility and topology variations in mobile ad hoc networks. The first algorithm forms clusters of nodes in the mobile network each with a leader. The clusters are constructed in a balanced way to distribute the network load evenly. The second algorithm builds a ring network among the leaders of the clusters. The ring backbone is constructed in a fault tolerant and energy efficient way. These two algorithms are integrated in a communication architecture. To the best of our knowledge, our algorithms are the first attempts that construct balanced clusters with a ring backbone. We show the operation of the algorithms, analyze their proof of correctness, time and message complexities and provide the simulation results in ns2 environment against the density, number of clusters, and mobility of the network. We compare our proposed algorithms with the existing algorithms, and show that our algorithms create a controllable number of balanced clusters and robust ring backbone infrastructures while, providing low message count and run-time.
  • Article
    Citation - WoS: 7
    Citation - Scopus: 7
    Structure and Stability of Bimodal Systems in R-3: Part 1
    (Azerbaijan National Academy of Sciences, 2014) Eldem, Vasfi; Şahan, Gökhan; Şahan, Gökhan; 04.02. Department of Mathematics; 04. Faculty of Science; 01. Izmir Institute of Technology
    In this paper, the structure and global asymptotic stability of bimodal systems in R3 are investigated under a set of assumptions which simplify the geometric structure. It is basically shown that one of the assumptions being used reduces the stability problem in R3 to the stability problem in R2. However, structural analysis shows that the behavior of the trajectories changes radically upon the change of the parameters of individual subsystems. The approach taken is based on the classification of the trajectories of bimodal systems as i) the trajectories which change modes finite number of times as t ? ?, and ii) the trajectories which change modes infinite number of times as t ? ?. Finally, it is noted that this approach can be used without some of the assumptions for all bimodal systems in R3, and for bimodal systems in Rn. © 2014, Azerbaijan National Academy of Sciences. All rights reserved.