Space, Time and Sequencing: Substitution at the Physical/ Virtual Interface

Measuring Accessibility for People with a Disability

“…Thus, authority conditions (e.g., published class schedules) can have a significant impact on relative accessibility. Forer and Huisman (2000) and Forer (1998a, 1998b) discuss space-time accessibility issues within the construct of sequencing and schedules. Including sequencing and scheduling conditions will, in general, exacerbate problems of relative accessibility between people with differing abilities.…”

Visual analytics of movement: An overview of methods, tools and procedures

“…Besides, statistics of various attributes describing the objects, their movements, or their activities in the location may be of interest. To obtain these measures, movement data are aggregated spatially into continuous density surfaces (fields) [24][59] or discrete grids [26][1]. While the most common approach is to aggregate points of trajectories and pointrelated attributes, Willems et al [59] have developed a specific kernel density estimation method for trajectories, which involves interpolation between consecutive trajectory points taking into account the speed and acceleration.…”

Spatio-temporal aggregation for visual analysis of movements

“…Similar to densities, other aggregated characteristics can be computed and visualized. Thus, in [8] the total number of person/minutes spent in each cell is computed. A sophisticated S×T×A-aggregation is suggested in [17]: position records are grouped spatially by cells of a regular grid and then temporal (e.g.…”