scholarly journals A Fast Group Communication Mechanism for Large Scale Distributed Objects

2003 ◽  
pp. 1036-1044 ◽  
Author(s):  
Hojjat Jafarpour ◽  
Nasser Yazdani
Keyword(s):  
Large Scale ◽  
Group Communication ◽  
Distributed Objects ◽  
Communication Mechanism ◽  
Fast Group

A scalable group communication mechanism for mobile agents

2007 ◽  
Vol 30 (1) ◽  
pp. 186-208 ◽  
Author(s):  
Hojjat Jafarpour ◽  
Nasser Yazdani ◽  
Navid Bazzaz-zadeh
Keyword(s):  
Mobile Agents ◽  
Group Communication ◽  
Communication Mechanism ◽  
Scalable Group Communication

scholarly journals A Source Like Any Other? Field and Survey Experiment Evidence on How Interest Groups Shape Public Opinion

2021 ◽  
Author(s):  
Andreas Jungherr ◽  
Alexander Wuttke ◽  
Matthias Mader ◽  
Harald Schoen
Keyword(s):  
Interest Groups ◽  
Interest Group ◽  
Large Scale ◽  
Group Communication ◽  
Survey Experiment ◽  
Moderating Effects ◽  
The Public ◽  
High Profile ◽  
Low Profile ◽  
The Impact

Abstract Interest groups increasingly communicate with the public, yet we know little about how effective they are in shaping opinions. Since interest groups differ from other public communicators, we propose a theory of interest group persuasion. Interest groups typically have a low public profile, and so most people are unlikely to have strong attitudes regarding them. Source-related predispositions, such as credibility assessments, are therefore less relevant in moderating effects of persuasive appeals by interest groups than those of high-profile communicators. We test this argument in multiple large-scale studies. A parallel survey and field experiment (N = 4,659) establishes the persuasive potential of low-profile interest groups in both controlled and realistic settings. An observational study (N = 700) shows that substantial portions of the public are unable to assess interest group credibility. A survey experiment (N = 8,245) demonstrates that credibility assessments moderate the impact of party but not interest group communication.

Exploring Job Migration Technique for P2P Grid Systems

2009 ◽  
Vol 1 (4) ◽  
pp. 16-25
Author(s):  
Kuan-Chou Lai ◽  
Chao-Chin Wu ◽  
Shih-Jie Lin
Keyword(s):  
Large Scale ◽  
Communication Model ◽  
Resource Monitoring ◽  
Effective Utilization ◽  
Grid Systems ◽  
Job Migration ◽  
Communication Mechanism ◽  
Migration Mechanism ◽  
Geographically Distributed ◽  
Migration Technique

P2P Grids can potentially solve large-scale scientific problems by using geographically distributed heterogeneous resources. However, a number of major technical obstacles must be overcome before this potential can be realized. One problem critical to the effective utilization of P2P Grids is the efficient scheduling of jobs. This study addresses the above-mentioned problem by describing and evaluating a P2P communication model, a P2P resource monitoring system and a job migration mechanism. In this study, the authors propose a P2P communication mechanism, which is built to deliver various information across heterogeneous Grid systems. Based on this P2P communication mechanism, they can develop job migration technology and then improve the usage of distributed computing resources.

scholarly journals OPTIMIZATION OF TOPOLOGICAL STRUCTURES OF CENTRALIZED LOGISTICS NETWORKS IN THE PROCESS OF REENGINEERING

2021 ◽  
pp. 23-31
Author(s):  
Vladimir Beskorovainyi ◽  
Antonii Sudik
Keyword(s):  
Genetic Algorithm ◽  
Mathematical Model ◽  
Time Complexity ◽  
Large Scale ◽  
System Optimization ◽  
Distributed Objects ◽  
Computational Point ◽  
Topological Structures ◽  
Logistics Networks ◽  
Current State

The subject of research in the article is the topological structures of closed logistics networks. The purpose of the work is to create a mathematical model and methods for solving problems of optimization of topological structures of centralized logistics networks in the process of reengineering, taking into account many topological and functional constraints. The article solves the following tasks: analysis of the current state of the problem of system optimization of logistics networks and methods of its solution; formalization of the problem of system optimization of logistics networks as territorially distributed objects; development of a mathematical model of the problem of optimization of centralized three-level topological structures of logistics networks at the stage of reengineering; development of a method for solving the problem of optimization of centralized three-level topological structures of logistics networks at the reengineering stage; estimation of time complexity of the method of optimization of centralized three-level topological structures of logistics networks. The following methods are used: methods of systems theory, methods of utility theory, optimization and operations research. The following results were obtained: analysis of the current state of the problem of system optimization of logistics networks and methods of its solution; the problem of system optimization of logistics networks as territorially distributed objects has been formalized; developed a mathematical model of the problem of reengineering three-level topological structures of logistics networks in terms of cost and efficiency for the case of combined production and processing points; methods of directed search of variants of construction of a logistic network which use procedures of coordinate optimization and modeling of evolution on the basis of genetic algorithm are developed; estimates of the accuracy and time complexity of optimization methods of centralized three-level topological structures of logistics networks are obtained. Conclusions: Based on the results of the study of methods for solving the problem, an approximation of their accuracy and time complexity was performed. In practice, this will allow you to choose a more efficient method for solving large-scale practical problems, based on the required accuracy, available computing and time resources. The method based on the coordinate optimization procedure has a significantly higher accuracy, but it is more complex from a computational point of view. The accuracy of the evolutionary method based on a genetic algorithm can be increased by increasing the number of iterations. The practical use of the proposed mathematical model and methods of reengineering the topological structures of centralized closed logistics systems by jointly solving problems for direct and reverse flows will reduce the cost of transport activities of companies. Keywords: closed logistics; logistics network; optimization; reengineering; structure; topology.

Distributed Dynamic Load Balancing in P2P Grid Systems

2011 ◽  
pp. 284-298
Author(s):  
You-Fu Yu ◽  
Po-Jung Huang ◽  
Kuan-Chou Lai
Keyword(s):  
Load Balancing ◽  
Large Scale ◽  
Resource Monitoring ◽  
Grid Systems ◽  
Resource Information ◽  
Distributed Load ◽  
Communication Mechanism ◽  
Geographically Distributed ◽  
Dynamic Resource ◽  
Heterogeneous Resources

P2P Grids could solve large-scale scientific problems by using geographically distributed heterogeneous resources. However, a number of major technical obstacles must be overcome before this potential can be realized. One critical problem to improve the effective utilization of P2P Grids is the efficient load balancing. This chapter addresses the above-mentioned problem by using a distributed load balancing policy. In this chapter, we propose a P2P communication mechanism, which is built to deliver varied information across heterogeneous Grid systems. Basing on this P2P communication mechanism, we develop a load balancing policy for improving the utilization of distributed computing resources. We also develop a P2P resource monitoring system to capture the dynamic resource information for the decision making of load balancing. Moreover, experimental results show that the proposed load balancing policy indeed improves the utilization and achieves effective load balancing.

Object-Oriented Architecture for Web Services Eventing

2010 ◽  
pp. 140-184
Author(s):  
Krzysztof Ostrowski ◽  
Ken Birman ◽  
Danny Dolev
Keyword(s):  
Web Service ◽  
Large Scale ◽  
Data Centers ◽  
Programming Model ◽  
Object Oriented ◽  
Distributed Objects ◽  
New Approach ◽  
Object Oriented Design ◽  
Component Integration ◽  
Qos Guarantees

Existing web service notification and eventing standards are useful in many applications, but they have serious limitations that make them ill-suited for large-scale deployments, or as a middleware or a component-integration technology in today’s data centers. For example, it is not possible to use IP multicast, or for recipients to forward messages to others, scalable notification trees must be setup manually, and no end-to-end security, reliability, or QoS guarantees can be provided. This chapter proposes an architecture based on object-oriented design principles that is free of such limitations, extremely modular and extensible, and that can serve as a basis for extending and complementing the existing standards. The new approach emerges from the authors’ work on Live Distributed Objects, a new programming model that brings object-orientation into the realm of distributed computing.

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