We consider guarding a city of k vertical buildings, each having a rectangular base, by placing guards only at vertices. The aim is to use the smallest number of guards. The problem is a 2.5D variant of the traditional art gallery problem, and finds applications in urban security. We give upper and lower bounds on the number of guards needed for a few versions of the problem. Specifically, we p...

The morphology of neurons is an important factor for the identification and the study of the changes that occur in the nervous system during development or as a result of disease or an experimental treatment. A number of methods to describe the topological aspects of neuronal morphology is discussed. Furthermore it is illustrated how different groups of neurons can be compared. Although both to...

Adults appreciate that an abstract visual representation can be understood through inferring the artist's intention. Many investigators have argued that this capacity is a late-emerging developmental accomplishment, a claim supported by findings that preschool children ignore explicit statements about intent when naming pictures. Using a simplified method, we explored picture naming in 2-year-o...

The films that I make are part documentary, part film essay, part visual poem. They are created out of a series of up to 30 drawings that are animated. The process from research to completion takes about 2 years, and at the end of it there is a film and a number of drawings that can be exhibited. This paper emerges out of the realisation that in the different stages of making a drawing and a fi...

We describe the ongoing development of a psychometric test to measure understanding of three-dimensional (3-D) concepts represented in drawings. The test consists of five subtests requiring participants to complete timed choice tasks previously used in experimental investigations of 3-D understanding, and a new subtest based on the idea of true length. We examined performance in terms of accura...

Lexical alignment refers to the adoption of one's interlocutor's lexical items. Accounts of the mechanisms underlying such lexical alignment differ (among other aspects) in the role assigned to addressee-centered behavior. In this study, we used a triadic communicative situation to test which factors may modulate the extent to which participants' lexical alignment reflects addressee-centered be...

Agents consistently appear prior to Patients in sentences, manual signs, and drawings, and Agents are responded to faster when presented in visual depictions of events. We hypothesized that this "Agent advantage" reflects Agents' role in event structure. We investigated this question by manipulating the depictions of Agents and Patients in preparatory actions in wordless visual narratives. We f...

I am indebted to Dr Robert R Coleman of The Medieval Institute, University of Notre Dame, for his kind assistance with the Biblioteca Ambrosiana drawings collection, to Dr Kliment P Gatzinsky of the Department of Anatomy, Gothenburg University, Sweden, for his consideration of the anatomical content of the paper, and to Mr William Schupbach, curator of the Iconographic Collections of the Wellco...

Given the increased attention paid to the development of arts in healthcare settings, the need for a formalised training framework to enable artists to work comfortably and safely in healthcare settings has become pressing. This paper sets out a review of literature and best practice regarding the training of professional artists wishing to work in healthcare settings. The authors' research con...