Component-based Implementation Research Articles

Evaluation of automatic feature detection algorithms in EEG: Application to interburst intervals

In this paper, we present a new method to compare and improve algorithms for feature detection in neonatal EEG. The method is based on the algorithm׳s ability to compute accurate statistics to predict the results of EEG visual analysis. This method is implemented inside a Java software called EEGDiag, as part of an e-health Web portal dedicated to neonatal EEG.EEGDiag encapsulates a component-based implementation of the detection algorithms called analyzers. Each analyzer is defined by a list of modules executed sequentially. As the libraries of modules are intended to be enriched by its users, we developed a process to evaluate the performance of new modules and analyzers using a database of expertized and categorized EEGs. The evaluation is based on the Davies–Bouldin index (DBI) which measures the quality of cluster separation, so that it will ease the building of classifiers on risk categories. For the first application we tested this method on the detection of interburst intervals (IBI) using a database of 394 EEG acquired on premature newborns. We have defined a class of IBI detectors based on a threshold of the standard deviation on contiguous short time windows, inspired by previous work. Then we determine which detector and what threshold values are the best regarding DBI, as well as the robustness of this choice. This method allows us to make counter-intuitive choices, such as removing the 50Hz filter (power supply) to save time.

Service-Oriented Development of Workflow-Based Semantic Reasoning Applications

The modern Semantic Web scenarios require reasoning algorithms to be flexible, modular, and highly-configurable. A solid approach, followed in the design of the most currently existing reasoners, is not sufficient when dealing with today's challenges of data analysis across multiple sources of heterogeneous data or when the data amount grows to the “Big Data” sizes. The “reasoning as a workflow” concept has attracted a lot of attention in the design of new-generation Semantic Web applications, offering a lot of opportunities to improve both flexibility and scalability of the reasoning process. Considering a single workflow component as a service offers a lot of opportunities for a reasoning algorithm to target a much wider range of potentially enabled Semantic Web use cases by taking benefits of a service-oriented and component-based implementation. We introduce a technique for developing service-oriented Semantic Reasoning applications based on the workflow concept. We also present the Large Knowledge Collider - a software platform for developing workflow-based Semantic Web applications, taking advantages of on-demand high performance computing and cloud infrastructures.

Models and frameworks: a synergistic association for developing component-based applications.

The use of frameworks and components has been shown to be effective in improving software productivity and quality. However, the results in terms of reuse and standardization show a dearth of portability either of designs or of component-based implementations. This paper, which is based on the model driven software development paradigm, presents an approach that separates the description of component-based applications from their possible implementations for different platforms. This separation is supported by automatic integration of the code obtained from the input models into frameworks implemented using object-oriented technology. Thus, the approach combines the benefits of modeling applications from a higher level of abstraction than objects, with the higher levels of code reuse provided by frameworks. In order to illustrate the benefits of the proposed approach, two representative case studies that use both an existing framework and an ad hoc framework, are described. Finally, our approach is compared with other alternatives in terms of the cost of software development.

A Component-based Design and Implementation for NAS Parallel Benchmarks

A Component-based Design and Implementation for NAS Parallel Benchmarks

Generación Automática de Software para Sistemas de Tiempo Real: Un Enfoque basado en Componentes, Modelos y Frameworks

Real-Time Systems have some characteristics that make them particularly sensitive to architectural decisions. The use of Frameworks and Components has proven effective in improving productivity and software quality, especially when combined with Software Product Line approaches. However, the results in terms of software reuse and standardization make the lack of portability of both the design and componentbased implementations clear. This article, based on the Model- Driven Software Development paradigm, presents an approach that separates the component-based description of real-time applications from their possible implementations on different platforms. This separation is supported by the automatic integration of the code obtained from the input models into object-oriented frameworks. The article also details the architectural decisions taken in the implementation of one of such frameworks, which is used as a case study to illustrate the proposed approach. Finally, a comparison with other alternative approaches is made in terms of development cost.

Component-based Functional Integrated Circuit System Design and Its Straight Implementation

Component-based Functional Integrated Circuit System (FICS) refers to the design and implementation of FICS using the Integrated Circuit system components. This paper discusses two parts: the Component-based Services Framework (CSF), or rather, the FICS framework for component-based application services, and Functional Integrated Circuit System Architecture Description Language (FICSADL), or rather, the application layer language for FICS service framework. The paper defines the FICSADL language elements, descriptive methods and formal specification by means of mapping the components of the service layer onto the connectors of the semantic layer. Various FICS business and system requirements are met by adjusting the connector glue parts on the semantic layer. Finally, the paper demonstrates the FICSADL π-calculus. This component-based FICS design and implementation is a design and implementation straight and directly from the algorithm to chip.

Design and Implementation of Basic Framework for Integration of Robot Technology Elements in Intelligent Space

This paper considers design and implementation of intelligent Space (iSpace) which is a space with many distributed sensors and actuators. iSpace system should have flexibility and scalability so that we can easily change the configuration of embedded devices and switch applications based on the situation. To realize such a system, iSpace framework requirements are discussed and a layered structure which consists of four layers – the sensor node, basic information server, application and actuator layers – is proposed. The structure makes it possible to fuse information extracted by each sensor node effectively and provides system flexibility and scalability. A componentbased iSpace implementation is also addressed. The designed framework is implemented using RT (Robot Technology) middleware.

Components meet aspects: Assessing design stability of a software product line

Context It is important for Product Line Architectures (PLA) to remain stable accommodating evolutionary changes of stakeholder’s requirements. Otherwise, architectural modifications may have to be propagated to products of a product line, thereby increasing maintenance costs. A key challenge is that several features are likely to exert a crosscutting impact on the PLA decomposition, thereby making it more difficult to preserve its stability in the presence of changes. Some researchers claim that the use of aspects can ameliorate instabilities caused by changes in crosscutting features. Hence, it is important to understand which aspect-oriented (AO) and non-aspect-oriented techniques better cope with PLA stability through evolution. Objective This paper evaluates the positive and negative change impact of component and aspect based design on PLAs. The objective of the evaluation is to assess how aspects and components promote PLA stability in the presence of various types of evolutionary change. To support a broader analysis, we also evaluate the PLA stability of a hybrid approach (i.e. combined use of aspects and components) against the isolated use of component-based, OO, and AO approaches. Method An quantitative and qualitative analysis of PLA stability which involved four different implementations of a PLA: (i) an OO implementation, (ii) an AO implementation, (iii) a component-based implementation, and (iv) a hybrid implementation where both components and aspects are employed. Each implementation has eight releases and they are functionally equivalent. We used conventional metrics suites for change impact and modularity to measure the architecture stability evaluation of the 4 implementations. Results The combination of aspects and components promotes superior PLA resilience than the other PLAs in most of the circumstances. Conclusion It is concluded that the combination of aspects and components supports the design of high cohesive and loosely coupled PLAs. It also contributes to improve modularity by untangling feature implementation.

Improving Train Maintenance Through Process Modelling and Component-Based System Design and Implementation

Improving the UK train services has been the subject of many debates in the last few years particularly after the privatization of the rail network in 1993. Within the network's complex structure, the train maintenance industry plays a major role in keeping trains in safe condition with a high standard of customer service. The results of a research work carried out by Loughborough University to investigate ways of improving the current practice in this industry through the application of business process modelling and component-based system design approaches are documented in the present paper. The method that has been adopted to enable a formal representation of a typical train maintenance process is discussed in detail and a case study based around a major maintenance supplier on the South West Trains network in the UK is described.

Component design, integration and service transformation in financial industry

Componentisation is the first step in component-based service design; this paper identifies component in business, service and physical layers to build up the alignment and inter-layer interoperability. Related research of this paper is service virtualisation, which is the final stage in service provisioning. This research paper reviews existing literature and uses examples in the industry to demonstrate how services are derived from business components, and how they are designed and produced in achieving service virtualisation. This paper also reviews recent literature in component-based implementation and uses example from the financial industry to review the design process for component-based service virtualisation.

An industry case study of micro component design and semantic mediation

This paper is a case study of enterprise integration in financial industry which consists of two parts. The first is component based design, and the second is semantic mediation. It explains why componentisation and semantics are both critical. This research paper uses examples in the industry to demonstrate component-based implementation and semantics mediation. To investigate the fundamental mechanism for the further understanding of the meaning of semantic mediation, we execute benchmarking by using both empirical experiments and theoretical modelling. Our observations show that a significant enhancement can be achieved by using the mediation strategy in semantic metadata.

Enterprise integration framework and semantic metadata in financial industry

This paper aims the enterprise architecture issue as a means of addressing the vertical gap in the cross-layers interconnectivity. We launched framework to address the integration strategy of metadata integration between business, service and information layers. This creates vertical alignment and uses metadata configuration to construct the mapping between each layer. This research paper reviews component-based implementation and uses an example in financial industry to review the design process from micro-component design to macro-component-based service virtualisation. The supplementary solutions of these two processes construct the enterprise integration interoperability and service virtualisation, which is the priority in financial industry.

A conceptual model of service customization and its implementation

With the development of Internet and next generation networks in telecommunications, more and more new services are required to be introduced into networks. Introducing new services into traditional network is always associated with standardizing new protocols. The progress of protocol standardization usually takes several years, which cannot meet the increasing demands of the applications in Internet and next generation networks. Service customization in network systems may be one possible solution to cope with this problem. Based on the principle that network service is provided by interactions among protocol entities, this paper proposes a conceptual model of service customization (SECUM) by separating the service logic from protocol interactive logic within existing network architecture. The theory of Communicating Sequential Processes (CSP) is used to formalize the SECUM in order to locate exactly the service logic and to define precisely the SECUM. For validating the SECUM's usability in practical network systems, this paper also proposes an implementation model for SECUM: a component-based protocol implementation model (CPIM). CPIM discomposes protocol entity into application component, service component, message component and communication component. Service component associates application component with message component. Users or network managers can customize network services by configuring service component. The paper shows respectively the applications of SECUM and CPIM by proposing a customizable IP service model based on SECUM and describing an implementation of Session Initiation Protocol (SIP) based on CPIM. Compared with the existing service-customization techniques, SECUM is a service customization model internal to network system and may provide more powerful capabilities of service customization.