This problem was suggested by Bradley Klee. For the related case of one cylinder rolling inside another, see [1]. When one cylinder is directly above the other, we define the line of contact of the lower cylinder, 1, with the horizontal plane to be the z-axis, at x = y = 0. Then, the condition of rolling without slipping for the lower cylinder is that when it has rolled (positive) distance x1, ...

This paper describes an interactive presentation that introduces the Talking Heads website, which was originally proposed at the AVSP'97 meeting in Rhodes, Greece. Talking Heads is an effort to bring together information from a wide range of sources. The site provides interactive access to multimodal material in both its original form and as summarized by us. In addition, the authors have provi...

C oncussion, or mild traumatic brain injury (MTBI), continues to occupy the center stage in sports medicine. The relationship between contact sports and degenerative central nervous system diseases—such as dementia, amyotrophic lateral sclerosis, depression, and chronic traumatic encephalopathy (CTE)—remains unclear and thus deserves focused investigation as researchers probe for clinical answe...

The growth in the human population poses a wide range of serious threats to the planet. Many have been highlighted but the political and social response has been ineffective in many countries. A special issue of the Philosophical Transactions of the Royal Society, published online, provides us “with an intellectual feast”, even though the papers “will leave a bitter taste in the mouth afterward...

This paper draws on the responses of 134 Heads of School and Heads of Department who were part of a larger study of 513 Australian higher education leaders. Heads of School / Department are at the centre of complex relational interfaces comprising faculty, students, central administration, and external entities and support agencies. While such experiences are not necessarily unique to Heads, th...

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In [1] we discussed functions of head movements and gaze. In this paper, we will go into more depth in the classification of various head movements: how they are distinguished in both formal and functional terms. We look at the distribution of a selection of primitive head movements and their related meanings and the way they are composed out of smaller units. This catalogue is not intended to ...