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Supporting resource reservation and allocation for unaware applications in Grid systems

CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE 2006年第8期18卷 851-863页

作者： Di Stefano, Antonella Fargetta, Marco Pappalardo, Giuseppe Tramontana, Emiliano Univ Catania Dipartimento Matemat & Informat I-95125 Catania Italy Univ Catania Dipartimento Ingn Informat & Telecomunicaz I-95125 Catania Italy

The dynamics of resource request rates in a Grid system can be wide ranging, to the point that request peaks for a single resource can be difficult to handle and end up greatly increasing the response time. Once a request has been submitted by a client, this has to cope with the potential overload arising. However, it is impractical to cure overload once it takes place by negotiating a different service or finding an equivalent resource, since the client would then bear the delay due to negotiation and re-submission. Instead, in order to effectively exploit Grid resources, it is crucial that applications perform reservation of resources before using them. Reservation allows a management system to consider application needs in advance and take suitable action to improve resource availability. In particular, this enables additional resources to be secured beforehand in the background when appropriate to avoid a potential overload, rather than paying the involved costs when overload arises. This paper proposes a software architecture that integrates applications with Globus services to conveniently handle resource reservation and allocation. Within the architecture, the computational reflection technology transparently connects applications with components that take care of advance reservation, as they dynamically sense the applications' resource needs. This dynamic information augments static knowledge gathered offline from static program code analysis. Copyright (c) 2005 John Wiley & Sons, Ltd.

关键词： Grid systems reservation computational reflection

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MetaSockets: design and operation of runtime reconfigurable communication services

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SOFTWARE-PRACTICE & EXPERIENCE 2006年第11-12期36卷 1157-1178页

作者： Sadjadi, S. M. McKinley, P. K. Kasten, E. P. Zhou, Z. Florida Int Univ Sch Comp & Informat Sci Auton Comp Res Lab Miami FL 33199 USA Michigan State Univ Dept Comp Sci & Engn Software Engn & Network Syst Lab E Lansing MI 48824 USA

This paper describes the internal architecture and operation of an adaptable communication component called the MetaSocket. MetaSockets are created using Adaptive Java, a reflective extension to Java that enables a component's internal architecture and behavior to be adapted at runtime in response to external stimuli. This paper describes how adaptive behavior is implemented in MetaSockets, as well as how MetaSockets interact with other adaptive components, such as decision makers and event mediators. Results of experiments on a mobile computing testbed demonstrate how MetaSockets respond to dynamic wireless channel conditions in order to improve the quality of interactive audio streams delivered to iPAQ handheld computers. Copyright (C) 2006 John Wiley & Sons, Ltd.

关键词： mobile computing quality-of-service computational reflection adaptive middleware real-time audio-streaming event-based systems

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Efficient runtime adaptability to support context-awareness in a robotic framework

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JOURNAL OF AMBIENT INTELLIGENCE AND SMART ENVIRONMENTS 2014年第1期6卷 107-109页

作者： Garcia, Miguel Ortin, Francisco Univ Oviedo Dept Comp Sci Oviedo Spain

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On the suitability of dynamic languages for hot-reprogramming a robotics framework: a Python case study

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SOFTWARE-PRACTICE & EXPERIENCE 2014年第1期44卷 77-104页

作者： Ortin, Francisco Mendez, Sheila Garcia-Diaz, Vicente Garcia, Miguel Univ Oviedo Dept Comp Sci Oviedo 33007 Spain B2B 2000 Dept Res & Dev El Entrego 33940 Spain

SUMMARY The development of service robots has gained more attention over the last years. Advanced robots have to cope with many different situations emerging at runtime, while executing complex tasks. They should be programmed as dynamically adaptive systems, capable of adapting themselves to the execution environment, including the computing, user, and physical environment. Recently, dynamic languages are becoming widely used because of the high runtime adaptability they offer. Therefore, we have analyzed the suitability of these languages to implement robotic systems with high runtime adaptability requirements, using Python as case study because of its maturity. To evaluate their suitability, we have implemented a reflective robotics framework that can be programmed in both Java and any dynamic language supported by the standard Java Scripting API. An example scenario has been developed using Python to show how its distinguishing meta-programming features have facilitated the development of runtime-adaptable robotics services. Copyright © 2012 John Wiley & Sons, Ltd. [PUBLICATION ABSTRACT]

关键词： computational reflection generative programming robotics framework dynamic languages Python Java Scripting API

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THE DSAW ASPECT-ORIENTED SOFTWARE DEVELOPMENT PLATFORM

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INTERNATIONAL JOURNAL OF SOFTWARE ENGINEERING AND KNOWLEDGE ENGINEERING 2011年第7期21卷 891-929页

作者： Ortin, Francisco Vinuesa, Luis Felix, Jose M. Univ Oviedo Dept Comp Sci Oviedo 33007 Spain Principal Asturias Dept Comp Sci Oviedo 33005 Spain

Aspect-Oriented Software Development (AOSD) provides systematic means to modularize crosscutting concerns in software development. Common AOSD benefits are a higher level of abstraction, concern reuse, better legibility, and software maintainability improvement. In AOSD, static weaving implementations commonly obtain better runtime performance, whereas dynamic weaving provides runtime application adaptiveness and a valuable aid in software development. Since both approaches provide benefits, we have developed a Dynamic and Static Aspect Weaving (DSAW) platform that supports both kinds of weavers: a full dynamic one to offer high dynamic adaptiveness and a static one to obtain better runtime performance when the application is deployed. Furthermore, both weaving techniques can even be used simultaneously in the same application. Depending on the adaptiveness requirements and the life cycle stage, the programmer could change from one type of weaving to the other without performing any modification in the source code of either components or aspects. Therefore, DSAW provides the separation of the dynamism (weaving-time) concern in the aspect-oriented software development process. Moreover, our platform also supports a wide set of join-points and is language and platform neutral. A detailed assessment has revealed that the DSAW platform provides a competitive alternative to develop aspect oriented software.

关键词： Aspect-oriented software development static weaving dynamic weaving separation of concerns dynamism computational reflection language neutrality

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A framework for the design and automated implementation of communication aspects in multi-agent systems

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JOURNAL OF NETWORK AND COMPUTER APPLICATIONS 2007年第3期30卷 1136-1152页

作者： Di Stefano, Antonella Pappalardo, Giuseppe Santoro, Corrado Tramontana, Emiliano Univ Catania Dipartimento Ingn Informat & Telecomunicaz I-95125 Catania Italy Univ Catania Dipartimento Matemat & Informat I-95125 Catania Italy

This paper presents REFCON, a framework for the automated development of Agent Communication Contexts (ACCs) in multi-agent systems (MASs). ACCs are intended to capture the interaction requirements of a MAS. A formal specification framework is first presented, aimed at modelling an ACC as a set of rules for filtering and filling messages, based on their contents, and the names and roles of the exchanging agents. A XML-based specification language is then introduced, which encodes the specification formalism for the sake of its computer processing. Finally, an object-oriented software architecture capable of supporting ACC-based MAS development is presented. REFCON key characteristic is that it allows a seamless integration of ACC support (even) into an existing MAS, at run-time, independently of the agent platform used for the implementation. This is made possible by a layered software architecture based on computational reflection, a technology that allows transparent evolution and adaptation of existing systems. The REFCON framework is also dynamic, in the two-fold sense that it is capable of both adding new rules and handling multiple contexts, which it can easily switch among, at run-time. The ACC-based design of an example MAS for document sharing is briefly discussed, as a demonstration of the principles put forward. (C) 2006 Published by Elsevier Ltd.

关键词： multi-agent systems software engineering computational reflection agent contexts agent communication languages

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Towards an integration science - The influence of Richard Bellman on our research

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JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS 2000年第1期249卷 3-31页

作者： Bellman, KL Landauer, C Aerosp Corp Aerosp Integrat Sci Ctr Los Angeles CA 90009 USA

In this paper, we describe the influence of Richard Bellman's work on our research. The influence is primarily felt in the attitude we take towards the research, which is that whenever the right mathematical tool for a problem that we are considering is not available, then some mathematical invention is required. We describe our research studies in software and system engineering for what we have called Constructed Complex Systems (we call them that to distinguish them from the mathematically more popular use of the term to refer to studies of fractals, chaos, and other behaviors in dynamical systems), which are large systems mediated or managed by computing systems, and the Integration Science that we believe is necessary fur adequately designing, building, and analyzing such systems. The two technical topic areas we describe are Wrappings, which is our knowledge-based integration infrastructure for Constructed Complex Systems, and Virtual Worlds, which provide a very interesting testbed for integrating a wide range of processes, from human activities to formal systems. In both cases, we describe some of the mathematical implications and requirements of our approach. (C) 2000 Academic Press.

关键词： integration science constructed complex systems computational reflection virtual worlds

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Designing Cooperating Self-Improving Systems 12

Designing Cooperating Self-Improving Systems

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IEEE International Conference on Autonomic Computing

作者： Landauer, Christopher Bellman, Kirstie Topcy House Consulting Thousand Oaks CA 91362 USA

ISBN: (纸本)9781467369718

The issue we consider is how to gain the capability of useful self-improvement in systems that are expected to participate in various systems of systems during their lifetime. This is not the same as improvement in cyberphysical systems (CPSs), even though large CPSs are systems of embedded systems. The difference is that we design and define the CPSs, so the integration onus is on us, not the systems and / or their components. In a System of Systems, we cannot define everything in advance, so the onus is on the participating systems. This paper is about designing systems so that they can help integrate, improve, and cooperatively improve themselves in a System of Systems that is unknown and unspecified at the time of their construction, and not completely known even during deployment.

关键词： computational reflection Wrapping Infrastructure Self-Monitoring and Self-Diagnosis Self-Integration Self-Improvement Cooperative System Improvement

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Improving Security and Interoperability of Interwoven Systems Through Rigorous Selective Encapsulation of Critical Physical Resources 3

Improving Security and Interoperability of Interwoven System...

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3rd IEEE International Workshops on Foundations and Applications of Self* Systems (FAS*W)

作者： Nelson, Phyllis R. Calif State Polytech Univ Pomona Elect & Comp Engn Dept Pomona CA 91768 USA

ISBN: (纸本)9781538651759

Creation of large systems beyond systems of systems has begun. These interwoven systems (IwSs) create possibilities for extensive benefits, but also pose challenges to the safety of the critical infrastructure elements which are included. Encapsulation of the highest-value processes and functions of these critical infrastructures provides not only increased security, but also presents opportunities to develop more efficient means of discovery and description for use in the construction of IwSs. Encapsulation also presents opportunities to simplify the overall control challenges and the development of symbols and languages to support IwSs.

关键词： Interwoven Systems Organic Computing Self-Organizing Systems Self-Integrating Systems computational reflection

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Modeling Spaces for Real-Time Embedded Systems 16

Modeling Spaces for Real-Time Embedded Systems

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16th IEEE International Symposium on Object/Component/Service-Oriented Real-Time Distributed Computing (ISORC)

作者： Landauer, Christopher Bellman, Kirstie L. Nelson, Phyllis R. Topcy House Consulting Thousand Oaks CA USA

ISBN: (纸本)9781479921133

No system in the real world can compute an appropriate response in reaction to every situation it encounters, or even most situations it is likely to encounter. Biological systems address this issue with four strategies: (1) a repertoire of already computed responses tied to a situation recognition process, (2) organized in a response-time hierarchy that allows a quick response to occur immediately, and one or more slower and more deliberate responses to begin at the same time, with (3) decision processes that allow one of them to take over after a little while, or that (4) merge several of them in a combined and possibly novel response. In this paper, we describe an approach to building self-adaptive computing systems that incorporates these strategies, to cope with their intended use in hazardous, remote, unknown, or otherwise difficult environments, in which it is known a priori that the system cannot keep up with all important events, and that "as fast as possible" is not appropriate for some interactions. The key to implementing these strategies is an abstraction / refinement hierarchy of behavioral models and processes at multiple levels of granularity and precision. The key to coordinating these different models is the collection of integrative mappings among them, which are developed along with the models, and used for managing system behavior. We also describe the system development process that we use to build such systems, which differs from conventional methods by taking the basic artifacts of development, considered as partial models of aspects of the system in its environment, and retains them all in a model hierarchy, which eventually becomes the definition of the run time system. We show how to implement such systems, explain why we think they are good candidates for real-time operational environments, and illustrate the method with an example implementation.

关键词： Self-Adaptive Systems Real-Time Systems Biological Principles computational reflection Wrapping Infrastructure Scenario-Based Engineering Process Self-Modeling Systems

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