216,555 research outputs found
Performance Comparison of Hibernate and EclipseLink Technologies for Mapping an Object-Oriented Model to a Relational Database
Different tiers of modern applications are built using object-oriented programming for implementing business logic and the relational database model for data storage. To solve the impendence mismatch issue that arises between the object model and relational schema, various Object-Relational Mapping (ORM) tools have been designed. In this research, the performance of two open source ORM technologies, namely Hibernate and EclipseLink, is investigated. Hibernate is a well established middleware solution while EclipseLink, which stems from Oracle’s TopLink, is a new product on the persistence landscape. For the purpose of this research, a web-based application was developed and used as a test system. The performance test facilities were integrated into design of the application. The abstract layer introduced into application’s architecture with the Spring Data Access Object (DAO), made the system highly modular allowing easily switching between persistence technologies with no alterations in the rest of the application code
Applying TOGAF to Define and Govern a Service-oriented Architecture in a Large-scale Research Project
The Service-oriented Architecture paradigm has become a widely adopted solution for enterprise application landscapes. SOA promises system integration improvement, business and IT alignment, applications reusability, and fast adaptability to changing requirements. Yet, the advantages that SOA offers lead to its main management challenges. An SOA consists not only of services. Business requirements, processes, models, rules, policies, and different stakeholders play also an important role. To manage this increased complexity and heterogeneity in SOA landscapes enterprises apply architecture frameworks and governance approaches. An essential enabler for SOA Governance is the traceable documentation of the service-oriented application landscape. This paper shows how the TOGAF Architecture Development Method was applied in a large-scale SOA-based research project to support the governance proposes in the context of a service marketplace. Supplementary templates were defined to guide the description of services, data models, and architectural components. Some of the models and decisions proposed by TOGAF were shifted to other phases to fit the innovative nature of research projects
Web-based forest resources management decision support system
In this paper, we present a web-based decision support system (DSS)—wSADfLOR—to
facilitate the access of stakeholders to tools that may contribute to enhancing forest management
planning. The emphasis is on a web-based architecture and a web graphic user interface (wGUI)
that may effectively support the analysis of trade-offs between ecosystem services in order to
address participatory and sustainable forest management objectives. For that purpose, the wGUI
provides remote access to a management information system, enabling users to analyze
environmental and biometric data and topological information as well. Moreover, the wGUI
provides remote access to forest simulators so that users may define and simulate prescriptions such
as chronological sequences of management options and the corresponding forest ecosystem services
outcomes. Remote access to management planning methods is further provided so that users may
input their objectives and constraints. The wGUI delivers information about tradeoffs between
ecosystem services in the form of decision maps so that users in different locations may negotiate
bundles of ecosystem services as well as the plan needed to provide them. The multiple criteria
programming routines provide proposals for management plans that may be assessed further, using
geographical and alphanumeric information provided by the wGUI. Results for an application to a
forested landscape extending to 14,388 ha are presented and discussed. This landscape provides
several ecosystem services and the development of its management plan involves multiple
stakeholders. Results show that the web-based architecture and the wGUI provide effective access
for stakeholders to information about the forest management planning area and to decision support
tools that may contribute to addressing complex multi-objective and multiple-decision-maker
management planning contexts. They also highlight that the involvement and participation of
stakeholders in the design of the web-based architecture contributes to assuring the quality and the
usability of the systeminfo:eu-repo/semantics/publishedVersio
Soft set theory based decision support system for mining electronic government dataset
Electronic government (e-gov) is applied to support performance and create more efficient and
effective public services. Grouping data in soft-set theory can be considered as a decision-making
technique for determining the maturity level of e-government use. So far, the uncertainty of the data
obtained through the questionnaire has not been maximally used as an appropriate reference for the
government in determining the direction of future e-gov development policy. This study presents
the maximum attribute relative (MAR) based on soft set theory to classify attribute options. The
results show that facilitation conditions (FC) are the highest variable in influencing people to use
e-government, followed by performance expectancy (PE) and system quality (SQ). The results provide
useful information for decision makers to make policies about their citizens and potentially provide
recommendations on how to design and develop e-government systems in improving public services
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