Abstract Traditional approaches to learning have often focused upon knowledge transfer strategies that centred on textually‐based engagements with learners, and dialogic methods of interaction tutors. The use virtual worlds, text‐based, voice‐based a feeling ‘presence’ naturally is allowing for more complex social interactions designed experiences role plays, as well encouraging learner empowerment through increased interactivity. To unpick these interactive experiences, this paper considers...

We describe a new approach to data integration which subsumes the previous approaches of local as view (LAV) and global (GAV). Our method, we term both (BAV), is based on use reversible schema transformation sequences. show how LAV GAV definitions can be fully derived from BAV sequences, sequences may partially or definitions. also supports evolution schemas, discuss ongoing implementation within AutoMed project.

WHILE THE INDEPENDENT DOMAIN CONCEPT ACCOUNTS RATHER SATISFACTORILY FOR HYSTERETIC BEHAVIOR OF PORE WATER IN SOME POROUS BODIES, THERE IS NO STRUCTURAL REASON WHY THIS SHOULD BE SO. ARTIFICIAL MATERIALS HAVE BEEN REPORTED WHOSE PROPERTIES VARY WIDELY FROM PREDICTIONS MODEL, AND MORE RECENTLY AUTHORS OBTAINED A NATURAL SAND WHICH DISCREPANCIES ARE QUITE SUBSTANTIAL. THEORETICAL ANALYSIS UNDERTAKEN, SUPPORTED BY EXPERIMENTS, TO ACCOUNT MATERIALS, MAY OCCUR WIDELY, EXISTING THEORY INADEQUATE....

EXPERIMENTAL DATA ARE REPORTED CONCERNING THE HYSTERESIS BEHAVIOR OF POROUS BODIES A SUBSTANTIAL MASS MADE UP SAND GRAINS AND RESULTS COMPARED WITH PREDICTIONS INDEPENDENT DOMAIN CONCEPT. TUBE COLUMNS MATERIAL USED GEOMETRY STABILIZED BY OVERBURDEN PRESSURE. DYNAMIC METHOD UTILIZES FACT THAT SUFFICIENTLY LONG COLUMN DRAINING TO STATIONARY WATER TABLE ATTAINS IN ITS UPPER PART STATE UNIFORM MOISTURE CONTENT SUCTION WHEN SUBJECTED INFILTRATION AT END CONSTANT RATE. THIS FLOW RATE EQUALS...

XML repositories are now a widespread means for storing and exchanging information on the Web. As these become increasingly used in dynamic applications such as e-commerce, there is rapidly growing need mechanism to incorporate reactive functionality an setting. Event-condition-action (ECA) rules technology from active databases natural method supporting suchfunctionality. ECA can be activities automatically enforcing document constraints, maintaining repository statistics, facilitating...

Abstract While it is commonly accepted that Learning Analytics (LA) tools can support teachers' awareness and classroom orchestration, not all forms of pedagogy are congruent to the types data generated by digital technologies or algorithms used analyse them. One such has been so far underserved LA exploratory learning, exemplified as simulators, virtual labs, microworlds some interactive educational games. This paper argues combination intelligent analysis interaction from an Exploratory...

The OWL 2 QL profile of the Web Ontology Language, based on family description logics called DL-Lite, is designed so that data stored in a standard relational database system (RDBMS) can be queried through an ontology via rewriting mechanism, i.e., by query into SQL then answered RDBMS system, without any changes to data. In this paper we propose language whose expressive power goes beyond DL-Lite while still allowing answering queries unions conjunctive two-way regular path (UC2RPQs)...

Three recent trends in database research are object-oriented and deductive databases graph-based user interfaces. We draw these together a data model we call the Hypernode Model. The single structure of this is hypernode , graph whose nodes can themselves be graphs. Hypernodes typed, types, too, nested give theoretical foundations hypernodes show that type checking tractable. also how conventional type-forming operators simulated by our including cyclic types. Model comes equipped with...

Summary It is shown on theoretical grounds that the shape of moisture profile about a moving water table depends upon both rate infiltration at soil surface and rise or fall table. The may be computed provided characteristic dependence hydraulic conductivity material content are known, also if should falling its velocity not exceed value dK/dc C u , prevailing infiltration, where conductivity, K equal to rate. Experiments described results presented show agreement between observed profiles...

We demonstrate the use of localized path indexes in generating efficient execution plans for regular queries. This study is motivated by both practicality this class queries and current dearth of scalable solutions their evaluation. Our proposed solution leverages widely available relational database technology often orders magnitude faster than currently known approaches. aim hands-on demonstration to highlight promise our approach stimulate further discussion engineering practical yet...

The MiGen project is designing and developing an intelligent exploratory environment to support 11-14-year-old students in their learning of algebraic generalization. Deployed within the classroom, system also provides tools assist teachers monitoring students' activities progress. This paper describes design these Teacher Assistance gives a detailed description one such tool, focusing particular on research challenges faced, technologies approaches chosen implement necessary functionalities...