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This work evaluates two simple speculation methods in terms of the mean losses and benefits they produce under different market conditions, after 200 days of activity. One of the methods is widely known while the other is proposed by the authors. An application was developed to mine the prices of financial assets from free web information providers. The results relate to stocks of the Spanish IBEX-35.
The analysis and characterization of biomedical image data is a complex procedure involving several processing phases, like data acquisition, preprocessing, segmentation, feature extraction and classification. The proper combination and parameterization of the utilized methods are heavily relying on the given image data set and experiment type and may thus require advanced image processing and classification...
This paper aims to provide a platform for assessing the maturity of a technology, based on web content mining. This approach provides benefits to decision makers that must face the tradeoff between an IT solution's development stage and its potential benefits to the organization. Also, the model presented in this paper can form a basis for upgrade decisions of existing IT infrastructure.
We describe a model-driven translation approach between semantic Web service based business process models in the context of the SUPER project. In SUPER we provide a set of business process ontologies for enabling access to the business process space inside the organisation at the semantic level. One major task in this context is to handle the translations between the provided ontologies in order...
Companies, institutions, and local authorities look for virtualizing all provided services to obtain more profit in terms of productivity, profitability, quality of service, traceability. The main issues are the identification of problems to solve and the choice of adapted solutions. To build these ones, functional and technical profiles must communicate to understand precisely the domain, the problem,...
The execution of process-oriented composite services described with BPMN has become a hot research topic. In this paper, we present a decentralized execution engine for BPMN-based composite services, the basic idea of which is to make a BPMN model directly executable without converting to another executable model. An executable BPMN model named BPD is first defined. Second, a set of algorithms are...
Web service evaluation is a phase in Web service selection where discovered Web services are evaluated with respect to user requests, which means that the non functional properties (NFPs) offered by Web services are compared with the non functional properties requested by users. NFPs cover Quality of Service (QoS) aspects, but also other business-related properties, such as pricing, and properties...
A formal approach to select tests for regression testing of changes performed in a system evolution step is proposed. Systems are modeled as extended finite state machines (EFSMs) supporting several commonly used data types including Booleans, numbers, arrays, queues and records. Tests are described using a sequence of input and expected output messages with concrete parameter values. Changes add/delete/replace...
The knowledge grid (KG) has gradually been becoming a keen research topic in the joint field of the semantic Web, the semantic grid, and the Web services for its potential impact in making full use of various resources, being it conceptual or physical, from the Web and grid. Many research activities in this direction focus on the architecture and its components, and base themselves technically on...
The current approaches to automatic identification of Web services for a given set of requirements involve matching based on the interface information published by the service providers. However, due to concerns about exposing of internals of Web services, this information is typically limited, thus rendering Web service matching quite difficult in practice. In this paper, we argue that service matching...
Web Services and grid-enabled scientific workflows are of paramount importance for the realization of efficient and secure knowledge discovery scenarios. This paper presents a Grid-enabled Genotype-to-Phenotype discovery scenario (GG2P), which is realized by a respective scientific workflow. GG2P supports the seamless integration of SNP genotype data sources, and the discovery of indicative and predictive...
The aspect of human interaction becomes more and more relevant for service-oriented applications. On one hand, current development approaches support the composition of services but neglect the creation of user interfaces. On the other hand, task-based modeling of user interactions is well established but poorly integrated into service-oriented development. In this paper we propose an integrated modelling...
In this paper we examine the problem of rich information environments and the need to narrow the agents attention to what is important for them to interact and later to evaluate and transfer reputation values, using attention allocation technique (AA). We also argue that this cannot be done without the aid of service oriented architecture (SOA). Reputation is used in our work as a service, presenting...
Service concept is evolving as a broad idea recurrently discussed in recent years as it originates from many disciplines such as marketing, operations and computer science. Despite this interdisciplinary nature of service concept, existing methodologies for building service-oriented systems provide limited support to include a complete coverage of various engineering phases for a unified development...
The paper presents an experience in the development of a web-based learning environment in project management, capable of building and conducting a complete and personalized training cycle for each learner. The initial design solution was based on IMS Learning Design standard. After the development of a first prototype, it was decided to redesign the system in order to move it gradually towards a...
While the potential benefits of multi-business interaction automation are truly phenomenal, the complexity of business has increased dramatically, and building reliable and secure e-business application systems becomes an important issue. Industry standards for Web service composition, such as BPEL, provide the notion of LRT (Long running transaction) for the execution of business processes in Web...
Value plays a central role in services and is considered as the ultimate objective that both providers and customers pursue through providing and consuming a service. In this paper, based on a brief discussion of the service value concept, we present a service value life cycle model (SVLC), where the value delivery process is decomposed into 7 phases (bi-lateral searching, bi-lateral negotiation,...
The language of choreography, WS-CDL, is a W3C candidate recommendation standard, which is an interactive description from global view but the language lacks formal semantics. WorkUnit in WS-CDL plays a crucial role because of reusable principle. In this paper, we propose process algebra for WS-CDL (PA4WS), which equips workunit. The semantics of PA4WS are presented based on structural operational...
In ubiquitous computing the multi-agent system can provide intelligent services to the users by effectively utilizing the resources distributed in the environment. The traditional load balancing approach based on the load condition of the nodes is not suitable to the multi-agent system (MAS). In this paper we propose an efficient load balancing scheme for MAS employing the models formulated to identify...
Pandemic diseases, such as avian influenza, can be deadly and disastrous although they do not happen frequently. Simulation is called for to control the spread of such diseases in preparing for the outbreaks. The spread of pandemic diseases can be affected by many factors, including virus vectors (such as migratory birds), climatic changes, and environment en route of virus vector migration. Many...
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