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1040 Publications


  • Depth First Search and Location Based Localized Routing and QoS Routing in Wireless Networks

    Ivan Stojmenovic; Mark Russell; Bosko Vukojevic (2012)
    In a localized routing algorithm, node A currently holding the message forwards it based on the location of itself, its neighboring nodes and destination. We propose to use depth first search (DFS) method for routing decisions. Each node A, upon receiving the message for the first time, sorts all its neighbors according to a criterion, such as their distance to destination, and uses that order in DFS algorithm. It is the first localized algorithm that guarantees delivery for (connected) wirel...

    Solving the Generalized Vertex Cover Problem by Genetic Algorithm

    Marija Milanović (2012)
    In this paper an evolutionary approach to solving the generalized vertex cover problem (GVCP) is presented. Binary representation and standard genetic operators are used along with the appropriate objective function. The experiments were carried out on randomly generated instances with up to 500 vertices and 100000 edges. Performance of the genetic algorithm (GA) is compared with CPLEX solver and 2-approximation algorithm based on LP relaxation. The genetic algorithm outperformed both CPLEX s...

    Square Key Matrix Management Scheme in Wireless Sensor Networks

    Jung-Chun Liu; Yi-Li Huang; Fang-Yie Leu; Feng-Ching Chiang; Chao-Tung Yang; William Cheng-Chung Chu (2017)
    In this paper we propose a symmetric cryptographic approach named Square Key Matrix Management Scheme (SKMaS) in which a sensor node named Key Distribution Server (KDS) is responsible for the security of key management. When the system starts up, the KDS sends its individual key and two sets of keys to sensor nodes. With the IDs, any two valid sensor nodes, e.g. i and j, can individually identify the corresponding communication keys (CKs) to derive a dynamic shared key (DSK) for encrypting/de...

    Parallel Tiled Code Generation with Loop Permutation within Tiles

    Marek Palkowski; Wlodzimierz Bielecki (2018)
    An approach of generation of tiled code with an arbitrary order of loops within tiles is presented. It is based on the transitive closure of the program dependence graph and derived via a combination of the Polyhedral and Iteration Space Slicing frameworks. The approach is explained by means of a working example. Details of an implementation of the approach in the TRACO compiler are outlined. Increasing tiled program performance due to loop permutation within tiles is illustrated on real-life...

    Learning Agent for a Service-Oriented Context-Aware Recommender System in Heterogeneous Environment

    Piotr Nawrocki; Bartłomiej Śnieżyński; Jakub Czyżewski (2017)
    Traditional recommender systems provide users with customized recommendations of products or services. They employ various technologies and algorithms in order to search and select the best options available while taking into account the user's context. Increasingly often, such systems run on devices in heterogeneous environments (including mobile devices) making use of their functionalities: various sensors (e.g. movement, light), wireless data transmission technologies and positioning syste...
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