Informal notions of context often imply much more than that captured in many computational formalisms of it. The view presented in this paper, built on our understanding of designing, is of context being larger than any one agent's representation of it. This paper describes how for an agent's reasoning about context it is the current situation that… (More)
The terms " context " and " situation " are often used interchangeably or to denote a variety of concepts. This paper aims to show that these are two different but related concepts and it reifies their difference within the framework of design agents. The external world of an agent is described as the aggregation of all entities that the agent could… (More)
Addition of menthol to cigarettes may be associated with increased initiation of smoking. The potential mechanisms underlying this association are not known. Menthol, likely due to its effects on cold-sensing peripheral sensory neurons, is known to inhibit the sensation of irritation elicited by respiratory irritants. However, it remains unclear whether… (More)
BACKGROUND Although it is known that acetaminophen causes oxidative injury in the liver, it is not known whether it causes oxidative stress in the respiratory tract. If so, this widely used analgesic may potentiate the adverse effects of oxidant air pollutants. OBJECTIVES The goal of this study was to determine if acetaminophen induces respiratory tract… (More)
A designer looking at a drawing sometimes notices things not originally intended. Conversely, not all implications of a design action are considered before each depiction action is taken. This paper describes an approach to understanding and reproducing this behaviour based on a situated interaction with an external representation.