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Approaches to Web service composition are dependent upon some form of repository to hold service descriptions. Most service composition software relies upon highly-optimized and proprietary formats for representing service descriptions and storing them into a repository. Unlike these approaches, this paper reports on the development and evolution of a standards-based service description repository...
Service-oriented architecture (SOA) provides a flexible paradigm to dynamically compose service processes from individual services. The flexibility, on the other hand, makes it necessary to monitor and manage service behaviors at runtime for performance assurance. One solution is to deploy software monitoring agents. In this paper, we present an approach to consider agent cost at process composition...
In this paper, we propose a Web service composition framework that uses Integer Linear Programming with non-functional objectives and constraints, in addition to the syntactic matching of Web services features. We envision that when Web services are fully deployed and commercialized in the near future, the criteria of Web service composition to achieve objectives will vary depending on users' needs...
Many automatic Web service composition algorithms based on AI planning techniques have been proposed. In this paper, we model the semantic Web service composition problem using a kind of simplified planning graph. It provides a unique search space, and can find a solution in polynomial time, but with possible redundant Web services.
The capabilities of organizations can be openly exposed, easily searched and discovered, and made readily-accessible to humans and particularly to machines, using service-oriented computing approaches. Artificial intelligence and software engineering researchers alike are tantalized by the promise of ubiquitously discovering and incorporating services into their own business processes (i.e. composition...
Identifying proper business processes, formalizing and documenting them has always been a challenge. Maintaining them in synchronization with changing business needs makes the problem harder. It becomes even harder when business processes are fully or partially implemented in IT systems where changes to the business cause changes in IT configurations. This paper presents an approach how IT configurations...
We investigate the structures of collaboration in software development groups by analyzing the data derived from the versioning system SVN (subversion) for several open source projects of different types and sizes. The goal of the work presented here is to investigate specific properties of the network topology in the collaboration groups of open source developer communities. For this purpose we developed...
Today, most approaches for inter-organizational business processes start bottom-up from the interfaces and the workflows of each partner described on the IT layer. Alternatively, one may start from the commitments and agreements between business partners to reach their complementary business goals. The latter approach is target of the UN/CEFACT Modeling Methodology (UMM), which models a global choreography...
Today, personalized services are lucrative for service providers and their customers. With their increasing pervasiveness and interconnection, however, customers show concerns about their privacy. If customers were to refuse the processing of their personal data in general, the economic potential of personalized services could not be realized. We claim that such scepticism is a direct consequence...
The collaboration landscape evolves rapidly by allowing people to participate in ad-hoc and process-centric collaborations. Thus, it is important to support humans in managing highly dynamic and complex interactions. The problem currently with managing interactions is that humans are unable to specify different interaction interfaces for various collaborations, nor able to indicate their availability...
WSDL Web services are built around the request-reply framework, requiring service invocation to be bundled together with all relevant data in a single message. Inefficiency becomes evident as Web service providers begin to offer more robust services that require massive datasets (e.g., multimedia and scientific data). Under the WSDL standards, these hefty datasets must be ported to an appropriate...
We discuss an agency model for an e-market place. When a marketplace goes from brick-and-mortar to virtual, incentive issues according to asymmetric information of e-mall providers become significant because contracting for an e-mall service can be "outcome-based." We discuss the Internet firm's incentives associated with the cost of operating an e-mall and different types of contracting...
Integrating service description, discovery, and invocation functionalities presents several fundamental problems in the management of web services and is a basic problem for composing Web services over a network. In this paper, we present the design of a system called "semantic service, wrapper, and invocation manager" (SSWiM) which provides these key functionalities. In particular, SSWiM...
Agent-based computing environments provide the capability to establish an enterprise of autonomous agents that collaborate and share information on common interests. Discovery of new data can alert users to changes in the information environment of importance to them. The goal of this research is to define an agent environment that models an organization's tacit knowledge. This document proposes a...
In the context of a research and development department of an enterprise, researchers regularly access, review, and use large amounts of literature, yet none of the exiting tools and solutions provide the wide range of functionalities required to properly manage these resources. Indeed, bibliography management systems manage the references and citations but fail to help researchers handle and locate...
It is the responsibility of an e-commerce provider to provision resources to ensure that the performance of the services provided by an e-commerce application is acceptable. A quantitative estimate of the performance expected from the site, obtained from the expected workload imposed on the application, may allow the provider to make informed decisions with respect to the right level of resources...
In this paper, we report our experience in the implementation of a module for creating user profiles of Web visitors by using Zones, Weights and Actions. The module is part of Gugubarra 2.0, a tool for better understanding and management of communities of registered Web visitors, currently being developed by the database group at the Computer Science Institute of the Goethe University in Frankfurt...
Trust is a critical issue in e-commerce and e-service environments. Some applications (such as eBay) have introduced various trust management mechanisms to provide valuable information to buyers prior to placing orders and making payments. While trust has been actively studied in the research community, some malicious sellers and fraudulent transactions still widely exist. A typical attack is to entice...
Managing business collaboration is about coordinating the flow of information among organizations and linking their business processes into a cohesive whole. A consistent outcome is expected within and among involving organization. However, inadequate coordination onthe autonomous, heterogeneous, and long-lasting cross-organizational business processes can lead to inconsistent execution in loosely-coupled...
For companies acting on a global scale, the necessity to monitor and analyze news channels and consumer-generated media on the Web, such as weblogs and n news-groups, is steadily increasing. In particular the identification of novel trends and upcoming issues, as well as their dynamic evolution over time, is of utter importance to corporate communications and market analysts. Automated machine learning...
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