A vectorial representation of the full sequence of events occurring during the 2D-NMR heteronuclear single-quantum correlation (HSQC) experiment is presented. The proposed vectorial representation conveys an understanding of the magnetization evolution during the HSQC pulse sequence for those who have little or no quantum mechanical background.…

Based on the importance and widely use of visualization in science, this article has a three-fold aim related to the terms of visualization, representation and model that in recent years have been introduced to the field of science education without clear differentiation. Firstly, the three terms are discussed with examples to provide a common…

This article presents the design and evaluation of a tool for inspecting conceptual models of system behaviour. The basis for this research is the Garp framework for qualitative simulation. This framework includes modelling primitives, such as entities, quantities and causal dependencies, which are combined into model fragments and scenarios.…

The learning object remains an ill-defined concept, despite numerous and extensive discussion in the literature. This paper attempts to address this problem by providing a classification that potentially brings together various perspectives of what a learning object may be. Six unique types of learning objects are proposed and discussed:…

This article addresses the application of the assessment triangle developed by the National Research Council (Pellegrino, Chudowsky, & Glaser, 2001), most specifically the cognition vertex of that triangle, to the unique learning characteristics of students with significant cognitive disabilities in developing and demonstrating academic…

A new approach to information science, activity theory emphasizes the centrality of practice as doing and activity and foregrounds setting and context as essential orienting concepts. It can provide information science with a rich, unifying, and heuristically valuable vocabulary and conceptual framework that will facilitate the continual…

This paper presents the Featural and Unitary Semantic Space (FUSS) hypothesis of the meanings of object and action words. The hypothesis, implemented in a statistical model, is based on the following assumptions: First, it is assumed that the meanings of words are grounded in conceptual featural representations, some of which are organized…

Gaming is discussed against a background of rationalist and historicist traditions of reality; trivial and nontrivial machine models of problem solving; and rigid-rule and free-form games. (JKP)

Critically analyzes an article by Jan Klabbers, focusing on methodological, epistemological, and ontological viewpoints. Examines the reasoning process whereby the actor approach model of learning environments is derived from the machine approach model; looks at claims of differentiation between rationalism and historicism, and the distinction…

Describes the difference between mediation and "mediatisation." Suggests the need for a paradigm shift away from the computational model of knowledge as pure information processing and task-centered problem solving to a more contextualist, sociointeractional, constructivist, user-centered model of cognition. (Author/AEF)

The Latent Semantic Indexing and MatchPlus systems examine similar contexts in which words appear and create representational models that capture the similarity of meaning of terms and then use the representation for retrieval. Text Retrieval Conference experiments using these systems demonstrate the computational feasibility of using…

The Web-based information and communication technology (w-ICT) has become a powerful means for delivery and dissemination of digitised information among the emerging virtual learning and business communities. The w-ICT has engendered a growing cybersphere paradigm to accommodate a huge mass of e-resources cast over the Web. Such abundance of…

A model is proposed for the general abstracting process (using disciplines such as linguistics, logic, and psychology) that is based on a system of combined strategies with four stages: reading-understanding; selection; interpretation; synthesis. (Author/JKP)

This paper presents a hybrid course framework at the Teachers College at Columbia University (New York) that seamlessly integrates a traditional course plan designed for on-campus students with an online course plan designed for distance learning students. Based on innovative teaching and learning principles, the course encourages active…