Location-independent Communication for Mobile Agents


Book Description

Abstract: "We study communication primitives for interaction between mobile agents. They can be classified into two groups. At a low level there are location dependent primitives that require a programmer to know the current site of a mobile agent in order to communicate with it. At a high level there are location independent primitives that allow communication with a mobile agent irrespective of its current site and of any migrations. Implementation of these requires delicate distributed infrastructure. We propose a simple calculus of agents that allows implementations of such distributed infrastructure algorithms to be expressed as encodings, or compilations of the whole calculus into the fragment with only location dependent communication. These encodings give executable descriptions of the algorithms, providing a clean implementation strategy for prototype languages. The calculus is equipped with a precise semantics, providing a solid basis for understanding the algorithms and for reasoning about their correctness and robustness. Two sample infrastructure algorithms are presented as encodings."




Mobile Agents


Book Description

Mobile agents are intelligent agents with advanced mobility capabilities. A mobile agent must be provided with the so called strong mobility, a feature which allows it to carry its status with it and accomplish its mission by migrating from site to site in the Internet. A mobile agent can complete in a site what it started in another site.Starting from the mobile agent concept, this book provides the reader with a suitably detailed discussion on mobile agent principles of operation, as for instance, migration, communication, co-ordination, interoperability, fault tolerance and security. As an example of mobile agents application fields, this book discusses how they can be effective in implementing data mining and information retrieval systems.




Mobile Agents in Networking and Distributed Computing


Book Description

The book focuses on mobile agents, which are computer programs that can autonomously migrate between network sites. This text introduces the concepts and principles of mobile agents, provides an overview of mobile agent technology, and focuses on applications in networking and distributed computing.




Mobile Agents


Book Description

Recent years have witnessed the appearance of new paradigms for designing distributed applications where the application components can be relocated - namically across the hosts of the network. This form of code mobility lays the foundation for a new generation of technologies, architectures, models, and - plications in which the location at which the code is executed comes under the control of the designer, rather than simply being a con?guration accident. Among the various ?avors of mobile code, the mobile agent paradigm has become particularly popular. Mobile agents are programs able to determine - tonomously their own migration to a di?erent host, and still retain their code and state (or at least a portion thereof). Thus, distributed computations do not necessarily unfold as a sequence of requests and replies between clients and - mote servers, rather they encompass one or more visits of one or more mobile agents to the nodes involved. Mobile code and mobile agents hold the potential to shape the next gene- tion of technologies and models for distributed computation. The ?rst steps of this process are already evident today: Web applets provide a case for the least sophisticated form of mobile code, Java-based distributed middleware makes - creasing use of mobile code, and the ?rst commercial applications using mobile agents are starting to appear.




Mobile Agents


Book Description

Af indhold: Part 1, Motivation for and Introduction to Mobile Agents. Part 2, Mobile Agents - Concepts, Functions, and possible Problems. Part 3, The Kalong Mobility Model - Specification and Implementation. Part 4, The Tracy Mobile Agent Toolkit




Formal Approaches to Agent-Based Systems


Book Description

This book constitutes the thoroughly refereed post-proceedings of the First International Workshop on Formal Approaches to Agent-Based Systems, FAABS 2000, held in Greenbelt, MD, USA, in April 2000. The 22 revised full papers presented together with 13 posters and two panel discussion reports were carefully reviewed and improved for inclusion in the book. The papers are organized in topical sections on verifying agents' mental states, synthesizing agents initially, frameworks and formalizations, modeling and execution, inter-agent communication, and adaptive agents.




The Handbook of Data Communications and Networks


Book Description

02. 2 Network topologies 744 02. 3 Token ring 747 02. 4 Ethernet 749 02. 5 LAN components 752 02. 6 Cabling standards 762 02. 7 Important networking definitions 769 03 Ethernet 771 03. 1 Introduction 771 03. 2 IEEE standards 772 03. 3 Ethernet-media access control (MAC) layer 773 03. 4 IEEE 802. 2 and Ethernet SNAP 775 03. 5 OSI and the IEEE 802. 3 standard 777 03. 6 Ethernet types 780 03. 7 Twisted-pair hubs 781 03. 8 100 Mbps Ethernet 782 03. 9 Gigabit Ethernet 787 03. 10 Bridges 792 03. 11 ARP 793 03. 12 RARP 797 03. 13 Spanning-Tree Protocol 798 03. 14 Additional 799 03. 15 Network interface card design BOO 03. 16 82559-based Ethernet 804 03. 17 Comparison of fast Ethernet with other technologies 806 04 Network Design, Switches and vLANs 807 04. 1 Introduction 807 04. 2 Network design 807 04. 3 Hierarchical network design 809 04. 4 Switches and switching hubs 814 04. 5 vlANs 818 05 Token Ring 825 05. 1 Introduction 825 05. 2 Operation 825 05. 3 Token Ring-media access control (MAC) 826 05. 4 Token Ring maintenance 828 05. 5 Token Ring multistation access units (MAUs) 829 05. 6 Cabling and connectors 830 05. 7 Repeaters 830 05. 8 Jitter suppression 831 06 FDDI 833 06. 1 Introduction 833 06. 2 Operation 834 06. 3 FOOl layers 834 06. 4 SMT protocol 836 06. 5 Physical connection management 836 06.




Internet Programming Languages


Book Description

This book is a collection of articles about the influence that the recent greater scope and availability of wide area networks is having on the semantics, design, and implementa tion of programming languages. The Internet has long provided a global computing in frastructure but, for most of its history, there has not been much interest in programming languages tailored specifically to that infrastructure. More recently, the Web has pro duced a widespread interest in global resources and, as a consequence, in global pro grammability. It is now commonplace to discuss how programs can be made to run effectively and securely over the Internet. The Internet has already revolutionized the distribution and access of information, and is in the process of transforming commerce and other areas of fundamental importance. In the field of programming languages, the Internet is having a deep revitalizing effect, by challenging many fundamental assumptions and requiring the development of new concepts, programming constructs, implementation techniques, and applications. This book is a snapshot of current research in this active area. The articles in this book were presented at the Workshop on Internet Programming Lan guages, which was held on May 13, 1998 at Loyola University, Chicago, USA. The pa pers submitted to the workshop were screened by the editors. After the workshop, the presented papers were refereed by an external reviewer and one of the editors, resulting in the current selection.




New Developments in Distributed Applications and Interoperable Systems


Book Description

Distributed applications are a necessity in most central application sectors of the contemporary information society, including e-commerce, e-banking, e-learning, e-health, telecommunication and transportation. This results from a tremendous growth of the role that the Internet plays in business, administration and our everyday activities. This trend is going to be even further expanded in the context of advances in broadband wireless communication. New Developments in Distributed Applications and Interoperable Systems focuses on the techniques available or under development with the goal to ease the burden of constructing reliable and maintainable interoperable information systems providing services in the global communicating environment. The topics covered in this book include: Context-aware applications; Integration and interoperability of distributed systems; Software architectures and services for open distributed systems; Management, security and quality of service issues in distributed systems; Software agents and mobility; Internet and other related problem areas. The book contains the proceedings of the Third International Working Conference on Distributed Applications and Interoperable Systems (DAIS'2001), which was held in September 2001 in Kraków, Poland, and sponsored by the International Federation on Information Processing (IFIP). The conference program presents the state of the art in research concerning distributed and interoperable systems. This is a topical research area where much activity is currently in progress. Interesting new aspects and innovative contributions are still arising regularly. The DAIS series of conferences is one of the main international forums where these important findings are reported.




Practical Aspects of Declarative Languages


Book Description

This book constitutes the refereed proceedings of the 7th International Symposium on Practical Aspects of Declarative Languages, PADL 2005, held in Long Beach, CA, USA in January 2005. The 17 revised full papers presented together with the abstracts of 2 invited talks were carefully reviewed and selected from 36 submissions. All current aspects of declarative programming are addressed including implementational issues and applications in areas such as database management, active networks, software engineering, decision support systems, and music composition.