Visualizations of static networks in the form of node-link diagrams have evolved rapidly, though researchers are still grappling with how best to show evolution of nodes over time in these diagrams. This paper introduces NetFlow, a network visualization system designed to support users in exploring temporal evolution in networks by using heat maps to display node attribute changes over time. Ne...

Hyperbolic browsers are motivated by the “Circle Limit IV” woodcut of M.C. Escher. The hyperbolic tree view was introduced in graph drawing by Lamping and Rao [2] who observed that large structures could be compactly displayed by projecting a tree onto a hyperbolic plane. The effect of the projection is that components appear diminishing in size and radius exponentially the further they move fr...

Traditionally, geometric dimensioning and tolerancing (GD&T) requirements have been exchanged with technical drawings. However, with the advent of computer-aided design, manufacturing, and inspection equipment, the ability to exchange these requirements in a computer-sensible manner has become increasingly more desirable. As “a data model is an effective technique to define the shareable semant...

Prior work supports the pedagogical value of conceptual maps for offering students an overview of a topic as well as the connections between subtopics. In this poster we describe a system that uses automated topic modeling technology to map the topics and sub-topics in a collection of documents. An interactive graphical representation allows users to explore this topic analysis, using it as an ...

Recent years have seen a growing interest in the role that student drawing can play in learning. Because drawing has been shown to contribute to students’ learning and increase their engagement, developing student models to dynamically support drawing holds significant promise. To this end, we introduce diagrammatic student models, which reason about students’ drawing trajectories to generate a...

BACKGROUND In recent years, interventions and health policy programmes have been established to promote patient empowerment, with a particular focus on patients affected by long-term conditions. However, a clear definition of patient empowerment is lacking, making it difficult to assess effectiveness of interventions designed to promote it. The aim in this study was to develop a conceptual map ...

Heart rate variability (HRV) is a simple technique which helps to assess the alterations in cardiac autonomic activity in healthy and diseased individuals. It is performed in various research centers using different hardwares and softwares. Hence, HRV reports generated from these centers cannot be compared unless their HRV data acquisition systems and the HRV analysis softwares correlate or agr...

Given a tree T spanning a set of points S in the plane, we study the problem of drawing T using only line segments aligned with a fixed set of directions C. The vertices in the drawing must lie within a given distance r of each original point p ∈ S, and an objective function counting the number of bends must be minimised. We propose five versions of this problem using different objective functi...

The question of under what conditions conceptual representation is compositional remains debatable within cognitive science. This paper proposes a well developed mathematical apparatus for a probabilistic representation of concepts, drawing upon methods developed in quantum theory to propose a formal test that can determine whether a specific conceptual combination is compositional, or not. Thi...

This poster reports on current work with the NSF-funded Achievement Standards Network (ASN) to support discovery of educational resources in digital libraries using conceptual graphs of officially promulgated achievement standards statements. Conceptual graphs or knowledge maps of achievement standards reveal the macrostructure of the learning domain modeled by those standards and support highe...