Formal Validation of Schema Clustering for Large Information Systems

To become usable for documentation and visualisation purposes, the conceptual schema of a large information system (IS) has to be clustered. [1] But most of the clustering , abstraction , or concentration rules proposed in [1]-[6] are substantiated only intuitively and have not been validated formally. As a consequence, the application of these rules to large IS schemata leads to inconsistencies (e.g. cyclic references), unnecessary loss of information (e.g. arbitrary object type subsets), and/or impractical results (e.g. combinatorical explosion). In this paper, the NF2 relational model [7] is used to validate the application of clustering operations to conceptual schemata. Based on this validation concept and a critical review of schema clustering literature, some validated, general clustering rules are presented. The schema clustering concept is extended to the clustering of textual documentations. To prove the concept\u27s feasibility, conceptual schemata and textual documentations of SAP\u27s R/3 modules Production Planning and Sales & Distribution have been clustere

Ontology mapping: the state of the art

Ontology mapping is seen as a solution provider in today's landscape of ontology research. As the number of ontologies that are made publicly available and accessible on the Web increases steadily, so does the need for applications to use them. A single ontology is no longer enough to support the tasks envisaged by a distributed environment like the Semantic Web. Multiple ontologies need to be accessed from several applications. Mapping could provide a common layer from which several ontologies could be accessed and hence could exchange information in semantically sound manners. Developing such mapping has beeb the focus of a variety of works originating from diverse communities over a number of years. In this article we comprehensively review and present these works. We also provide insights on the pragmatics of ontology mapping and elaborate on a theoretical approach for defining ontology mapping

A Developmental Organization for Robot Behavior

This paper focuses on exploring how learning and development can be structured in synthetic (robot) systems. We present a developmental assembler for constructing reusable and temporally extended actions in a sequence. The discussion adopts the traditions of dynamic pattern theory in which behavior is an artifact of coupled dynamical systems with a number of controllable degrees of freedom. In our model, the events that delineate control decisions are derived from the pattern of (dis)equilibria on a working subset of sensorimotor policies. We show how this architecture can be used to accomplish sequential knowledge gathering and representation tasks and provide examples of the kind of developmental milestones that this approach has already produced in our lab

CROSS-DB: a feature-extended multidimensional data model for statistical and scientific databases

Statistical and scientific computing applications exhibit characteristics that are fundamentally different from classical database system application domains. The CROSS-DB data model presented in this paper is optimized for use in such applications by providing advanced data modelling methods and application-oriented query facilities, thus providing a framework for optimized data management procedures. CROSS-DB (which stands for Classification-oriented, Redundancy-based Optimization of Statistical and Scientific DataBases) is based on a multidimensional data view. The model differs from other approaches by o~ering two complementary rnechanisrnsfor structuring qualifying information, classification and feature description. Using these mechanisms results in a normalized, low-dimensional database schema which ensures both, modelling uniqueness and understandability while providing enhanced modelling flexibility

A Comparative Review on Computational Modeling Paradigms. A Study on Case-Based Modeling and Political Terrorism

We review the advances in Case-Based Computational Modeling on Political Analysis issues. Starting in early „70s, the research on political terrorism has been challenged by the latest advances of terrorism computational modeling research. Nowadays Political Analysis community has a wider perspective over the terrorism research aims, methodology and instruments. Widening up this perspective is not a matter of political analysis and research only, it is as well a long-term effect of an interdisciplinary style which has been adopted within the area by acknowledging the scientific advances and support of the Computational Modeling and Simulation as a specific scientific research method. Computational Modeling includes several research frameworks. The Case-Based Modeling is analysed and evaluated on a comparative basis with Agent-Based Modeling in a study on political terrorism phenomena

Figuration & Frequency: A Usage-Based Approach to Metaphor

Two of the major claims of the cognitivist approach to metaphor, the paradigm which has emerged as dominant over the last three decades, are 1) that metaphor is a conceptual, rather than strictly linguistic, phenomenon, and 2) that metaphor exemplifies processes which are at work in cognition more generally. This view of metaphor is here placed within the context of the functionalist approach to language, which asserts that linguistic structure is emergent in nature, the use of language directly influencing the storage and representation thereof. The dissertation argues that metaphors, as conventionalized cognitive structures, are themselves highly influenced by frequency effects, and that metaphorical cross-domain mappings exist in the mind as conceptual schemata. Two corpus-based methods for assessing the frequency of overall metaphorical mappings are presented, both based on the use of key terms, attained using a survey method, for metaphorical source domains. These findings inform the hypotheses of a series of three experiments which test three key predictions of the view that metaphors are affected by frequency: that frequent metaphors should be more productive, accessible, and acceptable than infrequent ones. Both the corpus and experimental approaches, as well as data from previous research on metaphor at varying levels of conventionalization, support the view that metaphors are a usage-based phenomenon. The properties of various types of metaphorical utterances (e.g., idioms and novel metaphors) are best accounted for as arising from the interaction of the conceptual schemata that license cross-domain mappings, and syntactic schemata that link meanings to syntactic templates

Perceptual telerobotics

A sensory world modeling system, congruent with a human expert's perception, is proposed. The Experiential Knowledge Base (EKB) system can provide a highly intelligible communication interface for telemonitoring and telecontrol of a real time robotic system operating in space. Paradigmatic acquisition of empirical perceptual knowledge, and real time experiential pattern recognition and knowledge integration are reviewed. The cellular architecture and operation of the EKB system are also examined

What conceptual graph workbenches need for natural language processing

An important capability of the conceptual graph knowledge engineering tools now under development will be the transformation of natural language texts into graphs (conceptual parsing) and its reverse, the production of text from graphs (conceptual generation). Are the existing basic designs adequate for these tasks? Experience developing the BEELINE system's natural language capabilities suggests that good entry/editing tools, a generous but not unlimited storage capacity and efficient, bidirectional lexical access techniques are needed to support the supply of data structures at both the linguistic and conceptual knowledge levels. An active formalism capable of supporting declarative and procedural programs containing both linguistic and knowledge level terms is also important. If these requirements are satisfied, future text-readers can be included as part of a conceptual knowledge workbench without unexpected problems