Most stable structure for hard spheres

The hard sphere model is known to show a liquid-solid phase transition, with the solid expected to be either face centered cubic or hexagonal close packed. The difference in free energy between the two structures is very small and various attempts have been made to determine which one is the more stable. We contrast the different approaches and extend one.Comment: 5 pages, 1 embedded figure, to appear in Phys Rev

Investigating the 'latent' deficit hypothesis : age at time of head injury, executive and implicit functions and behavioral insight

This study investigated the 'latent deficit' hypothesis in two groups of frontotemporal headinjured patients, those injured prior to steep morphological and corresponding functional maturational periods for frontotemporal networks (≤ age 25), and those injured >28 years. The latent deficit hypothesis proposes that early injuries produce enduring cognitive deficits manifest later in the lifespan with graver consequences for behavior than adult injuries, particularly after frontal pathology (Eslinger, Grattan, Damasio & Damasio, 1992). Implicit and executive deficits both contribute to behavioral insight after frontotemporal head injury (Barker, Andrade, Romanowski, Morton & Wasti, 2006). On the basis of morphological and behavioral data, we hypothesised that early injury would confer greater vulnerability to impairment on tasks associated with frontotemporal regions than later injury. Patients completed experimental tasks of implicit cognition, executive function measures and the DEX measure of behavioural insight (Behavioral Assessment of the Dysexecutive Syndrome: Wilson, Alderman, Burgess, Emslie, & Evans, 1996). The Early Injury group were more impaired on implicit cognition tasks compared to controls that Late Injury patients. There were no marked group differences on most executive function measures. Executive ability only contributed to behavioral awareness in the Early Injury Group. Findings showed that age at injury moderates the relationship between executive and implicit cognition and behavioral insight and that early injuries result in longstanding deficits to functions associated with frontotemporal regions partially supporting the latent deficit hypothesis

Standard (Windsor, 1902)

Title Variations Windsor Standard (Windsor, Ontario,1902)Essex County Standard (Windsor, Ontario, 1902) Publication Dates 1902: Nov. 29 (Vol. 1: no 1) – 1912: Dec.? Frequency Weekly / Daily Online Holdings 1902: Nov. 29 (Vol. 1: no. 1) 8p. Pages 3-6 are missinghttps://scholar.uwindsor.ca/essexcountyontarionewspapers/1015/thumbnail.jp

Local government development priorities in developing regions: Implications for environmental management - case studies in the Free State Province, South Africa

Development at Local Government level in South Africa is guided by the formulation of Land Development Objectives (LDOs) which referred to the strategic planning phase of the Integrated Development Planning (IDP) process. Legislation determines that each Local Authority should identify and prioritise the most important developmental issues to ensure that the limited resources available are focussed on those aspects that are of the greatest concern to the community at large. Since the LDO process implies a legislative requirement with legally binding outcomes, it is significant to identify the development principles targeted; the aspects reflected in the long-term visions of the towns, and the development issues that received priority. The outcome of the latter will have direct implications for the focus of environmental management. This article will provide a short overview of the LDO process after which four case studies, representing a range of economic and demographic profiles, will be analysed. The most relevant and pressing local government development issues, identified by the specific communities within the context of a broad understanding of the term environment, will subsequently be highlighted. This will provide a context to realistically implement responsible environmental management practice

Backpacker tourism in South Africa: its role in an uneven tourism space economy

This paper focuses on the recent proliferation of backpacker establishments in South Africa and their potential contribution to development. Despite the rapid expansion of backpacker hostels, little is known about this industry in South Africa. The research reported in the paper seeks to address the absence of academic reflection on backpacker tourism, particularly in terms of its impact on development. It is suggested that, on the whole, backpacker tourists and backpacker hostels can make a valuable contribution towards the development of the South African tourism system in general and towards economic development in particular

The non-invasive assessment of the ischaemic limb, with particular reference to thermography.

Skin temperature (Tsk) has long been used in assessing limb circulation, and in recent years thermography has been used as an accurate way of measuring Tsk. However, apart from the general proposition that Tsk must be related to that of the blood, the precise relationship between the blood supply to a limb and its Tsk remains poorly understood. Without this knowledge full use cannot be made of thermography in the assessment of the limb with peripheral vascular disease. The purpose of these studies was to provide a scientific basis for the use of thermography on limbs. Previous work had indicated that Tsk was related to skin blood flow in the hand and foot, but not in the forearm or calf. This work has been confirmed and extended by studies on normal subjects at different ambient temperatures, and on subjects with a peripheral A-V fistula. I have shown that Tsk over the forearm and calf is related to the core temperature of the limb, i.e. to the arterial inflow. An attempt was then made to see if these findings could be used to interpret the abnormal thermograms found in a group of patients with intermittent claudication, and in a group with more severe peripheral vascular disease. In claudicants the regression line relating mean calf Tsk to total blood flow was parallel to, but higher than that in normal subjects, i.e. for the same blood flow, claudicants' Tsk was higher than in normal subjects. The reasons for this difference are not apparent. Thermograms in patients with more severe limb ischaemia were often difficult to interpret because of the confusion introduced by other pathologies. Thermography is a useful adjunct in the assessment of the ischaemic limb, but is unlikely to replace more conventional methods of investigation