The Semantic Web should enable greater access not only to content but also to services on the Web. Users and software agents should be able to discover, invoke, compose, and monitor Web resources offering particular services and having particular properties. As part of the DARPA Agent Markup Language program, we have begun to develop an ontology of services, called DAML-S, that will make these functionalities possible. In this paper we describe the overall structure of the ontology, the service profile for advertising services, and the process model for the detailed description of the operation of services. We also compare DAML-S with several industry efforts to define standards for characterizing services on the Web.

/pdf/daml-s-semantic-markup-for-web-services-2bz2kpfwet.pdf

DAML-S: semantic markup for web services

The paradigmatic shift from a Web of manual interactions to a Web of programmatic interactions driven by Web services is creating unprecedented opportunities for the formation of online business-to-business (B2B) collaborations. In particular, the creation of value-added services by composition of existing ones is gaining a significant momentum. Since many available Web services provide overlapping or identical functionality, albeit with different quality of service (QoS), a choice needs to be made to determine which services are to participate in a given composite service. This paper presents a middleware platform which addresses the issue of selecting Web services for the purpose of their composition in a way that maximizes user satisfaction expressed as utility functions over QoS attributes, while satisfying the constraints set by the user and by the structure of the composite service. Two selection approaches are described and compared: one based on local (task-level) selection of services and the other based on global allocation of tasks to services using integer programming.

/pdf/qos-aware-middleware-for-web-services-composition-x57gs4mhme.pdf

QoS-aware middleware for Web services composition

The Web is moving from being a collection of pages toward a collection of services that interoperate through the Internet. The first step toward this interoperation is the location of other services that can help toward the solution of a problem. In this paper we claim that location of web services should be based on the semantic match between a declarative description of the service being sought, and a description of the service being offered. Furthermore, we claim that this match is outside the representation capabilities of registries such as UDDI and languages such as WSDL.We propose a solution based on DAML-S, a DAML-based language for service description, and we show how service capabilities are presented in the Profile section of a DAML-S description and how a semantic match between advertisements and requests is performed.

https://www.cmpe.boun.edu.tr/~pyolum/cmpe596/papers/matchmaking.pdf

Semantic Matching of Web Services Capabilities

JADE (Java Agent Development Framework) is a software framework to make easy the development of multi-agent applications in compliance with the FIPA specifications. JADE can then be considered a middle-ware that implements an efficient agent platform and supports the development of multi agent systems. JADE agent platform tries to keep high the performance of a distributed agent system implemented with the Java language. In particular, its communication architecture tries to offer flexible and efficient messaging, transparently choosing the best transport available and leveraging state-of-the-art distributed object technology embedded within Java runtime environment. JADE uses an agent model and Java implementation that allow good runtime efficiency, software reuse, agent mobility and the realization of different agent architectures.

Developing Multi-Agent Systems with JADE

Service-oriented architectures (SOA) is an emerging approach that addresses the requirements of loosely coupled, standards-based, and protocol- independent distributed computing. Typically business operations running in an SOA comprise a number of invocations of these different components, often in an event-driven or asynchronous fashion that reflects the underlying business process needs. To build an SOA a highly distributable communications and integration backbone is required. This functionality is provided by the Enterprise Service Bus (ESB) that is an integration platform that utilizes Web services standards to support a wide variety of communications patterns over multiple transport protocols and deliver value-added capabilities for SOA applications. This paper reviews technologies and approaches that unify the principles and concepts of SOA with those of event-based programing. The paper also focuses on the ESB and describes a range of functions that are designed to offer a manageable, standards-based SOA backbone that extends middleware functionality throughout by connecting heterogeneous components and systems and offers integration services. Finally, the paper proposes an approach to extend the conventional SOA to cater for essential ESB requirements that include capabilities such as service orchestration, "intelligent" routing, provisioning, integrity and security of message as well as service management. The layers in this extended SOA, in short xSOA, are used to classify research issues and current research activities.

/pdf/service-oriented-architectures-approaches-technologies-and-1m0bcwz0fm.pdf

Service oriented architectures: approaches, technologies and research issues

/pdf/the-use-of-continuous-discrete-event-models-in-manufacturing-3qey6x13gn.pdf

The use of continuous/discrete event models in manufacturing

Military training and testing events integrate a diverse set of live and simulated systems, most of which were built independently and weren’t specifically designed to work together. Data interoperability and service-oriented architecture approaches, while essential, do not provide a complete solution to ensuring that systems will be fully compatible in their interactions. We describe a complementary approach that uses Web Ontology Language and Semantic Web Rule Language to capture information about the roles and capabilities required to complete a task, and the detailed attributes of candidate resources. Our toolset applies automated reasoning to determine whether each candidate resource has the requisite capabilities and is compatible with other resources. If there are multiple candidates for a role, the reasoner ranks the relative goodness of each with respect to constraints and metrics that are appropriate for the specific task needs of the exercise or deployment. We include worked examples illustrating the kinds of information we capture about resources and how rules and constraints are applied to provide a nuanced assessment of their compatibility in a specific context.

/pdf/ontologies-and-tools-for-analysing-and-composing-simulation-sut9n81ce8.pdf

Ontologies and tools for analysing and composing simulation confederations for the training and testing domains

As AI developers increasingly look to workflow technologies to perform complex integrations of individual software components, there is a growing need for the workflow systems to have expressive descriptions of those components. They must know more than just the types of a component's inputs and outputs; instead, they need detailed characterizations that allow them to make fine-grained distinctions between candidate components and between candidate workflows. This paper describes ProCat , an implemented ontology-based catalog for components, conceptualized as processes , that captures and communicates this detailed information. ProCat is built on a layered representation that allows reasoning about processes at varying levels of abstraction, from qualitative constraints reflecting preconditions and effects, to quantitative predictions about output data and performance. ProCat employs Semantic Web technologies RDF, OWL, and SPARQL, and builds on Semantic Web services research. We describe ProCat's approach to representing and answering queries about processes, discuss some early experiments evaluating the quantitative predictions, and report on our experience using ProCat in a system producing workflows for intelligence analysis.

/pdf/a-process-catalog-for-workflow-generation-p9clqkxu05.pdf

A Process Catalog for Workflow Generation

Haploidentical vs Matched Unrelated vs Matched Sibling Donor HCT with Post-Transplantation Cyclophosphamide.

Many previous researchers in the field of residential property value focused their attention on many tangible location factors which form the basis of residential property value. A critical look at these existing models and postulations revealed that residential property value is determined by many factors. It could be established that all these theories have some discrepancies as only few look at some intangible location attributes as indicators of land and landed property value. This study is aimed at developing a research framework that incorporate intangible location attributes as factors that determine and influence the values of residential properties in the study area. The research framework gives an insight into the nature of the research, that is, whether deductive or inductive approach is to be employed. It helps in identifying the research gap which the study seeks to fill in. The theoretical and conceptual framework were described and explained so as to have a clear focus in the conduct of the research. The research framework was primarily developed in order to answer all the research questions, objectives and hypothesis that might be used in the later part of the study. It can be concluded that research on the influence of intangible location attributes on the values of residential properties become imperative and essential due to the fact that few and very little research were conducted in this very important aspect of residential property value indicators. This research is absolutely a pioneering study into the effect of intangible location attributes on the values of residential properties in Jos metropolis, Nigeria. Further research efforts need to be carried out in other cities of Nigeria, to ascertain the general application of present findings. Keywords: Conceptual Framework, Intangible Location Attributes, Residential Property Value, Theoretical Framework and Violence

https://www.iiste.org/Journals/index.php/DCS/article/viewFile/25014/25617

David Martin

Papers

The use of continuous/discrete event models in manufacturing

Ontologies and tools for analysing and composing simulation confederations for the training and testing domains

A Process Catalog for Workflow Generation

Haploidentical vs Matched Unrelated vs Matched Sibling Donor HCT with Post-Transplantation Cyclophosphamide.

Research Framework Development on the Effect of Intangible Location Attributes on the Values of Residential Properties in Jos, Nigeria