In this paper we present a visual formalism for representing constraints over knowledge intensive domains. Our approach is based on Conceptual Graphs and consequently benefits from their visual and semantic properties. By expressing constraint satisfaction problems using conceptual graphs we can use effective hybrid strategies to solve them. Central to this approach is the possibility of using ...

resilience thinking in urban environment has been recently proposed as an effective measure to realize the objectives of sustainable development, minimize uncertainties and non linear interactions. this concept, in the context of modern urban ecology makes it possible to integrate natural and human factors and in urban systems and understanding the interactions between them, expanding sustainab...

Active learning methods, as problem-based learning, casebased teaching, didactic learning and web-based teaching are recognized strategies to stimulate student’s critical thinking [5]. These strategies aid students to learn and eventually integrate information [6]. These learning strategies differ in efficiency and applicability, but they are in the same conceptual framework which is the constr...

Expertise affords individuals a variety of advantages for learning and for problem solving, including competing advantages such as using automatic strategies vs. using sophisticated strategies. In the present study, high school students with varying levels of calculus expertise completed measures of conceptual understanding and skill with external representations before a task in which they wer...

In this paper we consider the solution space for the following problem. Let I be the information structure of a conceptual data model. Then the set S is deened as the set of alternative database implementations, representing the information structure I. In this view the problem of database design is: choose an appropriate element from S. We discuss the notion of design modiications, a means for...

information and communication technology (ict) has transformed how we live our lives and the way we interact in different contexts. benefits of ict and its upcoming efficiencies (i.e. energy efficiency) are becoming the heart of many public services’ reforms which have influenced the time, distance and space concepts. at present, not only there is a lack of clarity about what high-quality ictba...

Two major problems in schema integration are to identify correspondences between different conceptual schemas and to verify that the proposed correspondences are consistent with the semantics of the schemas. This problem can only be effectively addressed if the conceptual schema is expressed in a semantically rich modelling formalism. We introduce such a modelling formalism, the distinguishing ...

Conceptual information retrieval systems use structured document indices, domain knowledge and a set of heuristic retrieval strategies to match user queries with a set of indices describing the document's content. Such retrieval strategies increase the set of relevant documents retrieved (increase recall), but at the expense of returning additional irrelevant documents (decrease precision). Usu...

BACKGROUND The importance and complexity of handovers is well-established. Progress for intervening in the emergency department change of shift handovers may be hampered by lack of a conceptual framework. The objectives were to gain a better understanding of strategies used for change of shift handovers in an emergency care setting and to further expand current understanding and conceptualizati...