Mediator Connector for Composing Loosely Coupled Software Components

Component-Based Software Development (CBSD) is an approach that has many benefits, such as improving application developer productivity, reducing costs and complexity by reusing of existing codes. Programming within this approach is like assembly (i.e. composing software out of prefabricated components) rather than development, which reduces skill requirements, and allows expertise focuses on domain problems. The foundation of any CBSD methodology is its underlying component model, which defines what components are, how they can be constructed, and specifies the standards and conventions that are needed to enable composition of independently developed component. The current component models do not support composition in both design and deployment phase. They also focus on the specification and packaging of components but provide almost no support for the easy composition of components. Component in these models uses either direct or indirect message passing as connection schemes, which leads to tightly coupling (i.e. components mix computation with control). It is conclude that this research has proposed an effective way for component composition which provides loosely coupling between composed components. For system maintenance and evolution, this decoupling should make it simpler to manage changes in the components, and also changes in the connector separately. This research has resulted in the proposed of mediator connector which is similar to a communication hub. It initiates method calls and manages the returns, and also provides total loosely coupling between components and also itself. Mediator connector is a framework and can be reused without any modification. The components composition using mediator connector belongs to the deployment phase. Our approach is based on interactions between components as a subset of behavior in a system. In order to minimize coupling between components and mediator connector, we have designed and developed an XML-based language, called Component Interaction Markup Language (CIML), where components as well as their interactions are described in a CIML document which are used by mediator connector. For evaluation of mediator connector in order to measure the loosely coupling it provides, four case studies have been tested. To measure coupling we applied Coupling Between Object (CBO) software metric. The result shows that mediator connector provides totally loosely coupling between software components composing in the deployment phase

Leveraging legacy codes to distributed problem solving environments: A web service approach

This paper describes techniques used to leverage high performance legacy codes as CORBA components to a distributed problem solving environment. It first briefly introduces the software architecture adopted by the environment. Then it presents a CORBA oriented wrapper generator (COWG) which can be used to automatically wrap high performance legacy codes as CORBA components. Two legacy codes have been wrapped with COWG. One is an MPI-based molecular dynamic simulation (MDS) code, the other is a finite element based computational fluid dynamics (CFD) code for simulating incompressible Navier-Stokes flows. Performance comparisons between runs of the MDS CORBA component and the original MDS legacy code on a cluster of workstations and on a parallel computer are also presented. Wrapped as CORBA components, these legacy codes can be reused in a distributed computing environment. The first case shows that high performance can be maintained with the wrapped MDS component. The second case shows that a Web user can submit a task to the wrapped CFD component through a Web page without knowing the exact implementation of the component. In this way, a user’s desktop computing environment can be extended to a high performance computing environment using a cluster of workstations or a parallel computer

MultiFarm: A benchmark for multilingual ontology matching

In this paper we present the MultiFarm dataset, which has been designed as a benchmark for multilingual ontology matching. The MultiFarm dataset is composed of a set of ontologies translated in different languages and the corresponding alignments between these ontologies. It is based on the OntoFarm dataset, which has been used successfully for several years in the Ontology Alignment Evaluation Initiative (OAEI). By translating the ontologies of the OntoFarm dataset into eight different languages – Chinese, Czech, Dutch, French, German, Portuguese, Russian, and Spanish – we created a comprehensive set of realistic test cases. Based on these test cases, it is possible to evaluate and compare the performance of matching approaches with a special focus on multilingualism

Web-Based Information Systems in the Stock Market Financial Information Domain

The information domain is a recognised sphere for the influence, ownership, and control of information and it's specifications, format, exploitation and explanation (Thompson, 1967). The article presents a description of the financial information domain issues related to the organisation and operation of a stock market. We review the strategic, institutional and standards dimensions of the stock market information domain in relation to the current semantic web knowledge and how and whether this could be used in modern web based stock market information systems to provide the quality of information that their stakeholders want. The analysis is based on the FINE model (Blanas, 2003). The analysis leads to a number of research questions for future research

Tuple-based morphisms for interoperability establishment of financial information models

Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau de Mestre em Engenharia Electrotécnica e ComputadoresThe current financial crisis has demonstrated that there is a need for financial accounting data in a format which can be rapidly analyzed and exchanged. The appearance of XBRL in 2000 has helped create a ‘de facto’ standard data format for the exchange of financial information. However, XBRL by itself is not capable of ensuring a common semantic for the exchange of accounting information. Additionally, the existence of different accounting standards in different countries is a hindrance to efficient analysis and evaluation of companies by international analysts or investors. Therefore, there is a need to not only use a more advanced data format, but also for tools which can facilitate the exchange of accounting data, in particular when different accounting standards are used. This dissertation presents a tuple-based semantic and structural mapping for interoperability establishment of financial information models based on the use of ontologies and a ‘Communication Mediator’. It allows the mapping of accounting concepts of different accounting standards to be stored in the ‘Communication Mediator’. The mapping stored contains an ATL code expression, which with the aid of model transformation tools, can be utilized to perform the mapping between two different accounting models

The Cyber Physical Implementation of Cloud Manufactuirng Monitoring Systems

AbstractThe rise of the industrial internet has been envisaged as a key catalyst for creating the intelligent manufacturing plant of the future through enabling open data distribution for cloud manufacturing. The context supporting these systems has been defined by Service Oriented Architectures (SOA) that facilitate data resource and computational functions as services available on a network. SOA has been at the forefront EU research over the past decade and several industrially implemented SOA technologies exist on the manufacturing floor. However it is still unclear whether SOA can meet the multi-layered requirements present within state-of-the-art manufacturing Cyber Physical Systems (CPS). The focus of this research is to identify the capability of SOA to be implemented at different execution layers present in a manufacturing CPS. The state-of-the-art for manufacturing CPS is represented by the ISA-95 standard and is correlated with different temporal analysis scales, and manufacturing computational requirements. Manufacturing computational requirements are identified through a review of open and closed loop machine control orientations, and continuous and discrete control methods. Finally the Acquire Recognise Cluster (ARC) SOA for reconfigurable manufacturing process monitoring systems is reviewed, to provide a topological view of data flow within a field level manufacturing SOA