920 research outputs found
Names, addresses and identities in ambient networks
Ambient Networks interconnect independent realms that may use different local network technologies and may belong to different administrative or legal entities. At the core of these advanced internetworking concepts is a flexible naming architecture based on dynamic indirections between names, addresses and identities. This paper gives an overview of the connectivity abstractions of Ambient Networks and then describes its naming architecture in detail, comparing and contrasting them to other related next-generation network architectures
Semantic-driven matchmaking of web services using case-based reasoning
With the rapid proliferation of Web services as the medium of choice to securely publish application services beyond the firewall, the importance of accurate, yet flexible matchmaking of similar services gains importance both for the human user and for dynamic composition engines. In this paper, we present a novel approach that utilizes the case based reasoning methodology for modelling dynamic Web service discovery and matchmaking. Our framework considers Web services execution experiences in the decision making process and is highly adaptable to the service requester constraints. The framework also utilises OWL semantic descriptions extensively for implementing both the components of the CBR engine and the matchmaking profile of the Web services
Data mediation to message level conflict in heterogeneous web services
Enterprise Information Systems
(EISs) are built in isolated and
independent environments leading to
unpredictable and incompatible structure
of data stores. An EI system can expose its
functionalities as Web services to share
resources of existing global internet
infrastructure. The goal of this research
paper is to facilitate inter-operation
between Web services. Successful and
reliable information (message) exchange
between Web services is necessary to meet
the current challenge of Enterprise
Information Integration (EII). A real-\ud
world business process, which consists of
Web services WS1 and WS2, can be used
as a practical scenario for data or message
exchange between Web services. In this
scenario, message is exchanged by using
output of WS1 as input of WS2. If data
format of WS1 and WS2 are heterogeneous
or incompatible, interoperation between
them is impossible if data mediation is not
used to resolve message level conflict and
incompatibility in the context of syntax
and semantics. Data Mediation requires
mapping a message from one format to
another. We propose to derive a mediation
technique that will enable previously less
inter-operative heterogeneous Web
services to become more inter-operative
now. To improve inter-operational
performance between Web services our
data mediation approach extends and
utilizes existing Web service supporting
tools WSDL and SAWSDL. (Authors' abstract
Composable M&S web services for net-centric applications
Service-oriented architectures promise easier integration of functionality in the form of web services into operational systems than is the case with interface-driven system-oriented approaches. Although the Extensible Markup Language (XML) enables a new level of interoperability among heterogeneous systems, XML alone does not solve all interoperability problems users contend with when integrating services into operational systems. To manage the basic challenges of service interoperation, we developed the Levels of Conceptual Interoperability Model (LCIM) to enable a layered approach and gradual solution improvements. Furthermore, we developed methods of model-based data engineering (MBDE) for semantically consistent service integration as a first step. These methods have been applied in the U.S. in collaboration with industry resulting in proofs of concepts. The results are directly applicable in a net-centric and net-enabled environment
An extensible view system for supporting the integration and interoperation of heterogeneous, autonomous, and distributed database management systems
In this thesis the problem of integrating heterogeneous, autonomous and distributed database management systems (DBMSs) is addressed. To provide a solution, we have developed an approach, a design method, and a view system. Our approach is based on the invention of the abstract view constructs that have uniform and stable representations for supporting semantic relativism and distributed abstraction modeling. Our design method applies object-oriented techniques and software engineering concepts to manage the system complexity. Our view system has been constructed upon established experience with the development of large-scale distributed systems in a distributed object infrastructure provided by the Common Object Request Broker Architecture (CORBA). The scope of our research identifies the goals of Project Zeus in which we have created the Zeus View Mechanism ( ZVM) as the theoretical foundation of our approach. The notion of frameworks has been introduced as part of our design methodology to promote code/design reuse and enhance the portability/extensibility of the architectural design. A multidatabase system, the Zeus Multidatabase System ( ZMS), has provided a test bed for our concept. Project Zeus has exciting prospects. The foundation established in this research has created new directions in multidatabase research and will have a significant impact on future integration and interoperation technologies
Modeling, Simulation and Emulation of Intelligent Domotic Environments
Intelligent Domotic Environments are a promising approach, based on semantic models and commercially off-the-shelf domotic technologies, to realize new intelligent buildings, but such complexity requires innovative design methodologies and tools for ensuring correctness. Suitable simulation and emulation approaches and tools must be adopted to allow designers to experiment with their ideas and to incrementally verify designed policies in a scenario where the environment is partly emulated and partly composed of real devices. This paper describes a framework, which exploits UML2.0 state diagrams for automatic generation of device simulators from ontology-based descriptions of domotic environments. The DogSim simulator may simulate a complete building automation system in software, or may be integrated in the Dog Gateway, allowing partial simulation of virtual devices alongside with real devices. Experiments on a real home show that the approach is feasible and can easily address both simulation and emulation requirement
On the Design of Ambient Intelligent Systems in the Context of Assistive Technologies
The design of Ambient Intelligent Systems (AISs) is discussed in the
context of assistive technologies. The main issues include ubiquitous communications,
context awareness, natural interactions and heterogeneity, which are
analyzed using some examples. A layered architecture is proposed for heterogeneous
sub-systems integration with three levels of interactions that may be
used as a framework to design assistive AISs.Ministerio de Ciencia y Tecnología TIC2001-1868-C0
Modularity Archetypes and Their Coexistence in Technological Development: The Case of a Telecoms Company from Analogue Voice to 5G
Modularity is a key concept in the research and practice of information systems. Yet, it has been variously interpreted. Synthesizing the literature, we inductively develop a two-by-two matrix encapsulating two dualities of modularity: architectural vs. governance dimensions, and bottom-up vs. top-down perspectives. This matrix groups the literatures into four archetypical approaches to modularity (Engineering, Ecosystem, Generative and Logical). We next illustrate these archetypes through a qualitative study of a large global telecommunications firm. Drawing upon archival data and interviews, we show how each of these four approaches to modularity become dominant at different times, but also how they overlap and coexist
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