فا   |   En
ورود به سایت
عنوان مقاله نویسنده (ها) مربوط به کنفرانس چکیده
Ontology-based Distributed Intrusion Detection System F. Abdoli
M. Kahani
چهاردهمین کنفرانس بین‌المللی سالانه انجمن کامپیوتر ایران
Abstract—In this paper we discussed about utilizing methods and techniques of semantic web in the Intrusion Detection Systems. To extract semantic relations between computer attacks and intrusions in a Distributed Intrusion Detection System, we ... مشاهده کامل
Abstract—In this paper we discussed about utilizing methods and techniques of semantic web in the Intrusion Detection Systems. To extract semantic relations between computer attacks and intrusions in a Distributed Intrusion Detection System, we use ontology. Protégé software is our selected software for building ontology. In addition, we utilized Jena framework to make interaction between MasterAgent and attacks ontology. Our Distributed Intrusion Detection System is a network which contains some IDSagents and a special MasterAgent. MasterAgent contains our proposed attacks ontology. Every time a IDSagent detects an attack or new suspected condition, it sends detection’s report for MasterAgent. Therefore, it can extract the semantic relationship among computer attacks and suspected situations in the network with proposed ontology. Finally, the experience shows that the pruposed system reduced the rate of false positive and false negative. عدم مشاهده کامل
Abstract—In this paper we discussed about utilizing methods and techniques of semantic web in the Intrusion Detection Systems. To extract semantic relations between computer attacks and intrusions in a Distributed Intrusion Detection System, we ... مشاهده کامل
خرید مقاله
Job Failure Prediction in Grid Environment Based on Workload Characteristics Hamid Fadishei
Hamid Saadatfar
Hossein Deldari
چهاردهمین کنفرانس بین‌المللی سالانه انجمن کامپیوتر ایران
The power of grid technology in aggregating autonomous resources owned by several organizations into a single virtual system has made it popular in compute-intensive and data-intensive applications. Complex and dynamic nature of grid makes ... مشاهده کامل
The power of grid technology in aggregating autonomous resources owned by several organizations into a single virtual system has made it popular in compute-intensive and data-intensive applications. Complex and dynamic nature of grid makes failure of users’ jobs fairly probable. Furthermore, traditional methods for job failure recovery have proven costly and thus a need to shift toward proactive and predictive management strategies is necessary in such systems. In this paper, an innovative effort is made to predict the futurity of jobs submitted to a production grid environment (AuverGrid). By analyzing grid workload traces and extracting patterns describing common failure characteristics, the success or failure status of jobs during 6 months of AuverGrid activity was predicted with around 96% accuracy. The quality of services on grid can be improved by integrating the result of this work into management services like scheduling and monitoring. عدم مشاهده کامل
The power of grid technology in aggregating autonomous resources owned by several organizations into a single virtual system has made it popular in compute-intensive and data-intensive applications. Complex and dynamic nature of grid makes ... مشاهده کامل
خرید مقاله
Distributed Resource Discovery in Grid with Efficient Range Query Seyed Mehdi Fattahi
Nasrollah Moghaddam Charkari
چهاردهمین کنفرانس بین‌المللی سالانه انجمن کامپیوتر ایران
Grid is an environment that makes it possible to share resources that are managed by diverse, independent and administrative geographically distributed organizations. The main objective of grid is to enable ... مشاهده کامل
Grid is an environment that makes it possible to share resources that are managed by diverse, independent and administrative geographically distributed organizations. The main objective of grid is to enable users to solve problems using the available geographically distributed resources. Grid resource discovery is a challenging issue because characteristics of resources are heterogeneous, dynamic, various and autonomous. In this paper we propose a mobile agent approach based on peer to peer model for the resource discovery problem that presents essential characteristics for efficient, self-configuring and fault-tolerant resource discovery and is able to handle range queries. For this reason, we encode resources’ range attributes to bitmap index and compare with query attributes in order to know whether resource satisfies query or not. Moreover, we employ a Distributed Ant Colony System (ACS) algorithm to route requests into Grid and locate the required resources. The innovation in this paper is to support range queries and to eliminate centralized control and provide node autonomy. عدم مشاهده کامل
Grid is an environment that makes it possible to share resources that are managed by diverse, independent and administrative geographically distributed organizations. The main objective of grid is to enable ... مشاهده کامل
خرید مقاله
A Novel Approach towards QoS Provisioning in Delay-sensitive Flows over Wireless Networks Mohammad H. Hajiesmaili
Aresh Dadlani
Nasser Yazdani
Ahmad Khonsari
چهاردهمین کنفرانس بین‌المللی سالانه انجمن کامپیوتر ایران
Wireless networks are poised to support a myriad of existing as well as emerging multimedia streaming applications. With increase in use of wireless local area networks (WLANs), ranging from simple data transfer to bandwidth-intense, ... مشاهده کامل
Wireless networks are poised to support a myriad of existing as well as emerging multimedia streaming applications. With increase in use of wireless local area networks (WLANs), ranging from simple data transfer to bandwidth-intense, delay-sensitive, and loss-tolerant multimedia applications, issues regarding quality of service (QoS) have become a major research endeavor. Several challenges posed by robust video streaming over 802.11 WLANs include coping with packet losses caused by network buffer overflow, link erasures, or deadline misses. A major observation is that the retry limit settings of the MAC layer can be optimized in a way such that the overall packet loss caused by link erasure, buffer overflow, or deadline miss is minimized. In this paper, we propose a novel solution for minimizing packet loss in multimedia applications over WLANs. Simulation results justify the improved quality of the received video based on our proposed approach. عدم مشاهده کامل
Wireless networks are poised to support a myriad of existing as well as emerging multimedia streaming applications. With increase in use of wireless local area networks (WLANs), ranging from simple data transfer to bandwidth-intense, ... مشاهده کامل
خرید مقاله
An Improved Resource-based Performance Model for Optical Core Switches Aresh Dadlani
Ahmad Khonsari
Mohammad H. Hajiesmaili
Ahmad Kianrad
Abolfazl Dianat
چهاردهمین کنفرانس بین‌المللی سالانه انجمن کامپیوتر ایران
The evolution of optical technology has resulted in the emergence of several promising paradigms so as to realize the next generation Internet backbone infrastructure. Among all the existing switching techniques, optical burst switching (OBS) ... مشاهده کامل
The evolution of optical technology has resulted in the emergence of several promising paradigms so as to realize the next generation Internet backbone infrastructure. Among all the existing switching techniques, optical burst switching (OBS) has shown to support the bursty nature of diverse IP traffic classes more efficiently. Nevertheless, with increase in realtime applications over the Internet, devising mechanisms that guarantee quality of service (QoS) and efficient bandwidth utilization within the OBS network has become a major endeavor. In the literature, resource allocation-based QoS management has been investigated as a possible solution to overcome this necessity. However, to the best of our knowledge, the resource-based technique has not been analytically studied for any arbitrary number of traffic classes taking both, wavelengths and fiber delay lines (FDLs) into account. In this paper, we present a novel mathematical model for the resource-based approach with two service classes namely, real-time (H) and non real-time (L) classes. We then extend the model to cover any number of classes. The effectiveness of the model is justified through simulation experiments. عدم مشاهده کامل
The evolution of optical technology has resulted in the emergence of several promising paradigms so as to realize the next generation Internet backbone infrastructure. Among all the existing switching techniques, optical burst switching (OBS) ... مشاهده کامل
خرید مقاله
A Distributed Algorithm for Node Localization by Connectivity in Large Scale Wireless Mesh Sensor Networks Hosein Sabaghian-Bidgoli
Nasser Yazdani
Farshad Lahouti
چهاردهمین کنفرانس بین‌المللی سالانه انجمن کامپیوتر ایران
Locating sensor nodes is essential for many applications and protocols in wireless sensor network. Large numbers of localization algorithms have been proposed to do this. Distributed algorithms decrease communication cost while having lower accuracy. ... مشاهده کامل
Locating sensor nodes is essential for many applications and protocols in wireless sensor network. Large numbers of localization algorithms have been proposed to do this. Distributed algorithms decrease communication cost while having lower accuracy. In this paper we propose a distributed method to localize sensor node using only neighboring information. Our focus is on location estimation although some ideas are also presented for implementation. Our algorithm employs an error analysis scheme and calculates expected error as well as estimated location for each sensor node. Simulation results confirm effectiveness of our scheme and prove capability of using connectivity approach. عدم مشاهده کامل
Locating sensor nodes is essential for many applications and protocols in wireless sensor network. Large numbers of localization algorithms have been proposed to do this. Distributed algorithms decrease communication cost while having lower accuracy. ... مشاهده کامل
خرید مقاله
Multiprocessor Scheduling with Evolving Cellular Automata Based on Ant Colony Optimization Toktam Ghafarian
Hossein Deldari
Mohammad-R. Akbarzadeh –T.
چهاردهمین کنفرانس بین‌المللی سالانه انجمن کامپیوتر ایران
Multiprocessor scheduling belongs to a special category of NP-complete computational problems. The purpose of scheduling is to scatter tasks among the processors in such a way that the precedence constraints ... مشاهده کامل
Multiprocessor scheduling belongs to a special category of NP-complete computational problems. The purpose of scheduling is to scatter tasks among the processors in such a way that the precedence constraints between tasks are kept, and the total execution time is minimized. Cellular automata (CA) can be used for multiprocessor scheduling, but one of the difficulties in using CA is the exponentially increasing number of rules with increasing number of processor and neighborhood radius. Here, we propose a combined use of ant colony and evolutionary meta-heuristics to search the rule’s feasible space in order to find optimal rule base. Also we introduce a two dimensional cellular automata structure based on the important task attributes in the precedence task graph. The proposed scheduler that uses evolving cellular automata based on ant colony can find optimal response time for some of well known precedence task graph in the multiprocessor scheduling area. عدم مشاهده کامل
Multiprocessor scheduling belongs to a special category of NP-complete computational problems. The purpose of scheduling is to scatter tasks among the processors in such a way that the precedence constraints ... مشاهده کامل
خرید مقاله
Hard Real-Time Multiobjective Scheduling in Heterogeneous Systems Using Genetic Algorithms Mohammad Reza Miryani
Mahmoud Naghibzadeh
چهاردهمین کنفرانس بین‌المللی سالانه انجمن کامپیوتر ایران
Optimal tasks allocation is one of the most important problems in multiprocessing. Optimal assignment of tasks to a multiprocessor is an NPhard problem in general cases, and precedence task graph makes it more complex. ... مشاهده کامل
Optimal tasks allocation is one of the most important problems in multiprocessing. Optimal assignment of tasks to a multiprocessor is an NPhard problem in general cases, and precedence task graph makes it more complex. Many factors affect optimal tasks allocation. One of them is cache reload time in multiprocessor systems. These problems exist in real-time systems, too. Due to high sensitivity of ‘time’ in real-time systems, scheduling with respect to time constraints becomes very important. This paper proposes a suboptimal scheduler for hard realtime heterogeneous multiprocessor systems considering time constraints and cache reload time simultaneously, using multiobjective genetic algorithm. In addition, it tries to propose a generalized method for real-time multiobjective scheduling in multiprocessor systems using genetic algorithms. عدم مشاهده کامل
Optimal tasks allocation is one of the most important problems in multiprocessing. Optimal assignment of tasks to a multiprocessor is an NPhard problem in general cases, and precedence task graph makes it more complex. ... مشاهده کامل
خرید مقاله
An Improved Ant Algorithm for Grid Scheduling Problem Jamshid Bagherzadeh
Mojtaba MadadyarAdeh
چهاردهمین کنفرانس بین‌المللی سالانه انجمن کامپیوتر ایران
Grid computing is a promising technology for future computing platforms and is expected to provide easier access to remote computational resources that are usually locally limited. Scheduling is one of the active research topics ... مشاهده کامل
Grid computing is a promising technology for future computing platforms and is expected to provide easier access to remote computational resources that are usually locally limited. Scheduling is one of the active research topics in grid environments. The goal of grid task scheduling is to achieve high system throughput and to allocate various computing resources to applications. The Complexity of scheduling problem increases with the size of the grid and becomes highly difficult to solve effectively. Many different methods have been proposed to solve this problem. Some of these methods are based on heuristic techniques that provide an optimal or near optimal solution for large grids. In this paper we introduce a new task scheduling algorithm based on Ant Colony Optimization (ACO). According to the experimental results, the proposed algorithm confidently demonstrates its competitiveness with previously proposed algorithms. عدم مشاهده کامل
Grid computing is a promising technology for future computing platforms and is expected to provide easier access to remote computational resources that are usually locally limited. Scheduling is one of the active research topics ... مشاهده کامل
خرید مقاله
Resource discovery using rough set in Grid environment Iraj Ataollahi
Morteza Analoui
چهاردهمین کنفرانس بین‌المللی سالانه انجمن کامپیوتر ایران
Grid environment is being a service oriented infrastructure in which many heterogeneous resources participate for providing the high performance computation. On of bug issue in the grid environment is the vagueness and uncertainty between ... مشاهده کامل
Grid environment is being a service oriented infrastructure in which many heterogeneous resources participate for providing the high performance computation. On of bug issue in the grid environment is the vagueness and uncertainty between advertised resources and requested resources. In this work we propose a solution for the vagueness and uncertainty problems based on rough set theory. Here you can see how the rough set theory is developed to deal with the problem. We also report the result of the solution obtained from the simulation in Gridsim simulator. The comparison has been made between the proposed method and UDDI and OWL-S combined method. Rough set theory shows much better precision for the cases with vagueness and uncertainty. عدم مشاهده کامل
Grid environment is being a service oriented infrastructure in which many heterogeneous resources participate for providing the high performance computation. On of bug issue in the grid environment is the vagueness and uncertainty between ... مشاهده کامل
خرید مقاله
۲٨٦۱ نتیجه (صفحه ۱٠٣ از ۲٨٧)
کنفرانس‌ها و رخدادها
آرشیو کنفرانس‌ها
آرشیو مقالات
رخدادهای مرتبط





عضویت در انجمن کامپیوتر ایران
جستجوی مقالات