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    Capturing an intruder in product networks

    , Article 13th International Conference on High Performance Computing, HiPC 2006, Bangalore, 18 December 2006 through 21 December 2006 ; Volume 4297 LNCS , 2006 , Pages 193-204 ; 03029743 (ISSN); 354068039X (ISBN); 9783540680390 (ISBN) Imani, N ; Sarbazi Azad, H ; Zomaya, A ; Sharif University of Technology
    2006
    Abstract
    In this paper, we envision a solution to the problem of capturing an intruder in a product network. This solution is derived based on the assumed existing algorithms for basic member graphs of a graph product. In this problem, a team of cleaner agents are responsible for capturing a hostile intruder in the network. While the agents can move in the network one hop at a time, the intruder is assumed to be arbitrarily fast in a way that it can traverse any number of nodes contiguously as far as no agents reside in those nodes. Here, we consider a version of the problem where each agent can replicate new agents. Hence, the algorithm start with a single agent and new agents are created on demand.... 

    On Some Properties of OTIS Networks and Similar Networks

    , M.Sc. Thesis Sharif University of Technology Malekimajd, Marzieh (Author) ; Movaghar Rahimabadi, Ali (Supervisor)
    Abstract
    The plausibility of embedding cycles of different lengths in the graphs of a network (known as the pancyclicity property) has important applications in Interconnection networks, parallel processing systems, and implementation of a number of either computational or graph problems such as those used for finding storage schemes of logical data structures, layout of circuits in VLSI and etc. OTIS network is an important Interconnection network that worth investigating. This kind of network has benefits of having electronic connection and optic connection simultaneously. Furthermore, independent of the technology of network, the topology of this network has importance. In this thesis, we have... 

    Capturing an intruder in product networks

    , Article Journal of Parallel and Distributed Computing ; Volume 67, Issue 9 , 2007 , Pages 1018-1028 ; 07437315 (ISSN) Imani, N ; Sarbazi Azad, H ; Zomaya, A. Y ; Sharif University of Technology
    2007
    Abstract
    In this paper, we propose a solution to the problem of capturing an intruder in a product network. This solution is derived based on the assumption of existing algorithms for basic member graphs of a graph product. In this problem, a team of cleaner agents are responsible for capturing a hostile intruder in the network. While the agents can move in the network one hop at a time, the intruder is assumed to be arbitrarily fast in a way that it can traverse any number of nodes contiguously as far as no agents reside in those nodes. Here, we consider a version of the problem where each agent can replicate new agents. Thus, the algorithm starts with a single agent and new agents are created on... 

    Investigating Widely Applicable Graphs in Computer Networks

    , M.Sc. Thesis Sharif University of Technology Eyvazi, Maryam (Author) ; Mahmoodian, Ebadollah (Supervisor)
    Abstract
    Since today graphs have many applications in different sciences including computer networks, in this thesis a number of graphs which have been widely used in computer networks, are studied.The graphs presented in this thesis are hypercubes, generalized hypercubes (Bhuyan and grawal, 1984), balanced hypercubes (Huang and Jie, 1992) and the star graphs (Sheldon and Akers, 1987), which are the generalization of the hypercubes and have similar properties.In general the graph which is considered for computer networks as an interconnection structure,should have small degrees of vertices, a small diameter, and a large number of paths between any two vertices. Thus in our studies these three... 

    Distant-based resource placement in product networks

    , Article 18th International Conference on Parallel and Distributed Computing, Applications and Technologies, PDCAT 2007, Adelaide, SA, 3 December 2007 through 6 December 2007 ; January , 2007 , Pages 31-35 ; 0769530494 (ISBN); 9780769530499 (ISBN) Imani, N ; Sarbazi Azad, H ; Zomaya, A. Y ; Sharif University of Technology
    2007
    Abstract
    The utilization of the limited resources of a multiprocessor or multicomputer system is a primary performance issue crucial for the design of many scheduling algorithms. While many of the existing parallel machines benefit from a regular product network topology, almost none of the previous resource placement techniques have come to recognize and exploit this Inherent regularity. This paper introduces some novel algorithms for deriving resource placement schemes in product networks based on the assumed perfect resource placement in their underling basic graphs. © 2007 IEEE  

    Mathematical performance analysis of product networks

    , Article 13th International Conference on Parallel and Distributed Systems, ICPADS, Hsinchu, 5 December 2007 through 7 December 2007 ; Volume 2 , 2007 ; 15219097 (ISSN); 9781424418909 (ISBN) Moraveji, R ; Sarbazi Azad, H ; Sharif University of Technology
    2007
    Abstract
    In this paper, we propose the first comprehensive mathematical performance model for product networks where fully adaptive routing is applied. Besides the generality of this model which makes it suitable to be used for any product graph, our analysis shows that the proposed model exhibits high accuracy. Simulation results show the validity and accuracy of the model even in heavy traffic and saturation region, where other models have severe problems for prediction. © 2007 IEEE  

    Performance modeling of Cartesian product networks

    , Article Journal of Parallel and Distributed Computing ; Vol. 71, issue. 1 , 2011 , p. 105-113 ; ISSN: 07437315 Moraveji, R ; Sarbazi-Azad, H ; Zomaya, A.Y ; Sharif University of Technology
    Abstract
    This paper presents a comprehensive performance model for fully adaptive routing in wormhole-switched Cartesian product networks. Besides the generality of the model which makes it suitable to be used for any product graph, experimental (simulation) results show that the proposed model exhibits high accuracy even in heavy traffic and saturation region, where other models have severe problems to predict the performance of the network. Most popular interconnection network can be defined as a Cartesian product of two or more networks including the mesh, hypercube, and torus networks. Torus and mesh networks are the most popular topologies used in recent supercomputing parallel machines. They... 

    Resource placement in Cartesian product of networks

    , Article Journal of Parallel and Distributed Computing ; Vol. 70, issue. 5 , May , 2010 , p. 481-495 ; ISSN: 7437315 Imani, N ; Sarbazi-Azad, H ; Zomaya, A.Y ; Sharif University of Technology
    Abstract
    The utilization of the limited resources of a multiprocessor or multicomputer system is a primary performance issue which is crucial for the design of many scheduling algorithms. While many of the existing parallel machines benefit from a regular product network topology, almost none of the previous resource placement techniques have come to recognize and exploit this inherent regularity. This paper introduces several novel algorithms for deriving resource placement schemes in product networks based on the assumption of perfect resource placement in their underling basic graphs. Our techniques use known schemes for the basic networks as their building blocks for deploying the resource... 

    Performance modeling of Cartesian product networks

    , Article Journal of Parallel and Distributed Computing ; Volume 71, Issue 1 , 2011 , Pages 105-113 ; 07437315 (ISSN) Moraveji, R ; Sarbazi Azad, H ; Zomaya, A. Y ; Sharif University of Technology
    Abstract
    This paper presents a comprehensive performance model for fully adaptive routing in wormhole-switched Cartesian product networks. Besides the generality of the model which makes it suitable to be used for any product graph, experimental (simulation) results show that the proposed model exhibits high accuracy even in heavy traffic and saturation region, where other models have severe problems to predict the performance of the network. Most popular interconnection network can be defined as a Cartesian product of two or more networks including the mesh, hypercube, and torus networks. Torus and mesh networks are the most popular topologies used in recent supercomputing parallel machines. They... 

    Resource placement in Cartesian product of networks

    , Article Journal of Parallel and Distributed Computing ; Volume 70, Issue 5 , 2010 , Pages 481-495 ; 07437315 (ISSN) Imani, N ; Sarbazi-Azad, H ; Zomaya, A.Y ; Sharif University of Technology
    2010
    Abstract
    The utilization of the limited resources of a multiprocessor or multicomputer system is a primary performance issue which is crucial for the design of many scheduling algorithms. While many of the existing parallel machines benefit from a regular product network topology, almost none of the previous resource placement techniques have come to recognize and exploit this inherent regularity. This paper introduces several novel algorithms for deriving resource placement schemes in product networks based on the assumption of perfect resource placement in their underling basic graphs. Our techniques use known schemes for the basic networks as their building blocks for deploying the resource... 

    Resource placement in the edge product of graphs

    , Article 22nd International Conference on Advanced Information Networking and Applications, AINA 2008, Gino-wan, Okinawa, 25 March 2008 through 28 March 2008 ; 2008 , Pages 212-218 ; 1550445X (ISSN) ; 0769530958 (ISBN); 9780769530956 (ISBN) Moinzadeh, P ; Sarbazi Azad, H ; Sharif University of Technology
    2008
    Abstract
    In a large system, it is neither economical nor efficient to equip each node with a copy of the resource, and it is desirable to distribute the copies of the resource so that certain performance measure is obtained. In this paper we consider the problem of distributing resources in the edge product of networks. The algorithms presented in this paper make use of the known placements for the basic graphs composing the product graph. Therefore, in these placements we avoid the additional costs needed for deploying and rescaling the network. © 2008 IEEE  

    A general approach for analytical modeling of irregular NoCs

    , Article Proceedings of the 2008 International Symposium on Parallel and Distributed Processing with Applications, ISPA 2008, 10 December 2008 through 12 December 2008, Sydney, NSW ; 2008 , Pages 327-334 ; 9780769534718 (ISBN) Moraveji, R ; Moinzadeh, P ; Sarbazi Azad, H ; Sharif University of Technology
    2008
    Abstract
    So far, many analytical models have been proposed in the literature to evaluate the performance of networks with different topologies such as hypercube, torus, mesh, hypermesh, Cartesian product networks, star graph, and k-ary n-cube; however, to the best of our knowledge, no mathematical model has been presented for irregular networks. Therefore, as an effort to fill this gap, this paper presents a comprehensive mathematical model for fully adaptive routing in wormhole-switched irregular networks. Moreover, since our approach holds no assumption for the network topology, the proposed analytical model covers all the aforementioned models (i.e. it covers both regular and irregular...