The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Process flexibility has been investigated in depth in the context of intra-organisational processes, but it is still an open issue when processes cross the boundaries of companies. In this paper, we address the modelling of flexible inter-organisational processes using a version-based approach. Indeed, versions are known to be a powerful technique to deal with variability, evolution and adaptation...
Process aware Information Systems (PaIS) have an ever-increasing importance in Enterprise Information Systems for supporting both their intra and inter-organizational processes. However PaIS still have important issues to address, including flexibility of inter-organizational (i.e., collaborative) processes before their definitive acceptance and their use in companies. This paper addresses this issue...
The Semantic Web is an infrastructure that enables the interchange, the integration and the reasoning about information on the Web. In the Semantic Web, the resources are described using particular metadata called “Semantic annotations”. A semantic annotation is a particular case of annotation which refers to ontology. The Web content is, for the most part, subject to uncertainty or imperfection....
Building ontologies is very important for diverse domains and especially for semantic Web. We find in the literature many methods and tools for this building. However, the fuzzy aspect is not enough studied in these methods and tools, whereas information systems can include uncertainties and imperfections. The goal of the definition of fuzzy ontologies is to integrate these characteristics. So, we...
This paper extends FSM, a recently proposed semantic data model that supports fuzziness, imprecision and uncertainty of real-world. More precisely, the paper proposes four new concepts, decisional grouping, inhibition, multiplicity and selection, which allows enhancing the modeling of real-world applications. It integrates these concepts in FSM by the definition of new decision rules.
The conceptual formalisms supported by typical ontologies may be not sufficient for handling imprecise information commonly found in many application domains. Fuzzy ontologies are developed to overcome this problem. The implementation, inference and query of fuzzy ontologies gain more attention in recent years. This paper addresses fuzzy ontology implementation and query answering on databases. We...
This paper presents a framework for real-time database design that is able to support real-time database requirements such as time-constrained data and time-constrained transactions. It is based upon a real-time object-oriented data model in which each object encapsulates time-constrained data, time-constrained methods and concurrency control mechanisms. Our framework is composed of an UML profile...
This paper focuses on studying efficient solutions for modeling and deriving compositional tests for component-based real-time systems. In this work, we propose a coherent framework that does not require the computation of the synchronous product (composition) of components, and therefore avoids a major bottleneck in this class of test. For this framework, we introduce an approach and associated algorithm...
This paper shows how it is possible to use ontologies to deal with coordination of workflow processes in loose inter-organizational workflow (IOW). The aim of IOW is to support the cooperation between distributed and heterogeneous business processes running in different autonomous organizations to reach a common goal, corresponding to a value-added service. Loose IOW refers to occasional cooperation,...
A real-time database is a database in which both the data and the operations upon the data may have timing constraints. The design of this kind of database requires the introduction of new concepts to modelize both data structures and the dynamic behavior of the database. In this paper, we propose an UML2.0 profile, entitled UML-RTDB, allowing the design of structural model for a real-time database...
Schema evolution keeps only the current data and the schema version after applying schema changes. On the contrary, schema versioning creates new schema versions and preserves old schema versions and their corresponding data. Much research work has recently focused on the problem of schema evolution in XML databases, but less attention has been devoted to schema versioning in such databases. In this...
Nowadays, it is important to consider the fast changing environment which drives organizations to frequently adapt their Workflow Processes (WP). Consequently, this paper deals with the design of Evolutionary Workflow Processes (EWP). EWP refer to any modification of the tasks and their coordination (process model), actors and roles (organizational model), and/or data (informational model). First,...
Crisp ontologies become less suitable in all domains in which the concepts to be represented have imprecise definitions. Fuzzy ontologies are developed to overcome this problem. Determining similarity relations among fuzzy ontology components is essential for many reuse subprocesses, for query rewriting as well as for fuzzy ontology modeling. Denning similarity relations within fuzzy context may be...
To contribute to the promotion of concurrency controllers for temporal databases, we propose in this paper to formally check the access concurrency control algorithm proposed using SPIN. This algorithm is based on the optimistic approach and must guarantee strong consistency for transaction time relations. SPIN provides a software model checking with a powerful tool to detect errors. It is an appropriate...
Perovskite PZT variants were synthesized from stoichiometric oxide ratios of Pb, Zr, Ti, Ni and Sb. The oxide powders were mixed mechanically and calcinated, and then sintered to form the desired perovskite phase. The multi-component ceramic system consisting of the PbZrO 3 -PbTiO 3 -Pb(Ni 1/3 , Sb 2/3 )O 3 (PZT-PNS) ternary system near the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.