1. introduction language teachers frequently observe a gap between their students' potential competence and their performance in the class. anderson (1993) attributes this to the fact that human has a limited processing capacity and is not able to attend to various aspects of a task simultaneously. this limitation causes l2 learners not to be able to focus on both meaning and form at the same t...

The line planning problem in public transport deals with the construction of a system of lines that is both attractive for the passengers and of low costs for the operator. In general, the computed line system should be connected, i.e., for each two stations there have to be a path that is covered by the lines. This subproblem is a generalization of the well-known Steiner tree problem; we call ...

This thesis introduces the Steiner connectivity problem. It is a generalization of the well known Steiner tree problem. Given a graph G = (V,E) and a subset T ⊆ V of the nodes, the Steiner tree problem consists in finding a cost minimal set of edges connecting all nodes in T . The Steiner connectivity problem chooses, instead of edges, from a given set of paths a subset to connect all nodes in ...

We describe the Zaroff system, a plan-based controller for the players in a game of hide and seek. The system features visually realistic human gure animation including realistic human locomotion. We discuss the planner's interaction with a changing environment to which it has only limited perceptual access. A hierarchical planner translates the game's goals of nding hiding players into locomot...

Accurate and detailed monitoring of population distribution and evolution is of great significance in formulating a population planning strategy in China. The Defense Meteorological Satellite Program’s Operational Linescan System (DMSP/OLS) nighttime lights time-series (NLT) image products offer a good opportunity for detecting the population distribution owing to its high correlation to human ...

This paper focuses on pedagogical planning and illustrates the on-line system IAMEL aimed at supporting teachers in the process of designing, structuring and planning educational activities for their students. Pedagogical planning is meant as the description, at different level of granularity, of the playing out of a learning situation or a unit of learning aimed at the acquisition of a precise...