On the Proper Setup of the Double Mach Reflection as a Test Case for the Resolution of Gas Dynamics Codes

This note discusses the initial and boundary conditions as well as the size of the computational domain for the double Mach reflection problem when set up as a test for the resolution of an Euler scheme for gas dynamics

New options for explicit all Mach number schemes by suitable choice of time integration methods

Many low-Mach or all-Mach number codes are based on space discretizations which in combination with the first order explicit Euler method as time integration would lead to an unstable scheme. In this paper, we investigate how the choice of a suitable explicit time integration method can stabilize these schemes. We restrict ourselves to some old prototypical examples in order to find directions for further research in this field

Why Majority Judgement is not yet the solution for political elections, but can help finding it

Like many other voting systems, Majority Judgement suffers from the weaknesses of the underlying mathematical model: Elections as problem of choice or ranking. We show how the model can be enhanced to take into account the complete process starting from the whole set of persons having passive electoral rights and even the aspect of reelection. By a new view on abstentions from voting and an adaption of Majority Judgement with three grades, we are able to describe a complete process for an election that can be easily put into legislation and sets suitable incentives for politicians who want to be reelected

Efficiency the key to future pig production

No Abstrac

A short note on the stability of a class of parallel Runge-Kutta methods

With this short note, we close a gap in the linear stability theory of block predictor-corrector Runge-Kutta schemes originally proposed for the parallel solution of ODEs

Access to healthy foods: Part I. Barriers to accessing healthy foods: Differentials by gender, social class, income and mode of transport

This paper examines the issues of access to food and the influences people face when shopping for a healthy food basket. It uses data from the Health Edu cation Authority's 1993 Health and Lifestyles Survey to examine the barriers people face in accessing a healthy diet. The main findings are that access to food is primarily determined by income, and this is in turn closely related to physical resources available to access healthy food. There is an associated class bias over access to sources of healthy food. The poor have less access to a car, find it harder to get to out-of-town shopping centres and thus are less able to carry and transport food in bulk. The majority of people shop in supermarkets as they report that local shops do not provide the services people demand and that food choice and quality are limited. In tackling food poverty and pro moting healthy eating, health promotion practice needs to address these struc tural issues as opposed to relying on psycho-social models of education based on the provision of information and choice

Becoming Rower: Male Embodiment and Intimacy in an Inner West Rowing Club

While sociological analyses of masculine sporting cultures have provided us with adept explorations of discursive practices in the field, I suggest that there are deeper modalities of communication in which athlete’s intentions are expressed and understood through inter-corporeal and non-cognitive processes. This transdisciplinary thesis supplements sociological analysis with a participant observational approach to explore both verbal and corporeal communication between men within the sport of rowing. I conduct ethnographic fieldwork at Kenswick, a rowing club located within Sydney’s inner suburbs that was first established in 1879. Following its reincarnation after a fire in the late 1990’s, the club developed a new membership demographic that now reflects that of inner Sydney more broadly. Close to half of the club’s members are gay-identifying with varying degrees of sexual openness relating to the various and overlapping social and sporting circuits operating within the club. Over four months I was embedded within the elite competitive men’s rowing squad across which time I observed that the combination of open and ambiguous sexual orientations resulted in tacit but strict protocols on and off the water. In line with Latour's argument that the social researcher should ‘follow’ (2005: 69) the interplay between human and non-human actants, I attended to the various machines engaged in the different zones of training both on and off the water. Using a combination of auto-ethnographic reflection and new materialist studies I explore how the material actants engaged in the sport of rowing engender varying inter-corporeal collaborations between men. As a result, I argue that masculine intimacy, discomfort and power must be understood on a corporeal level as well as the discursive level, with which we normally associate gender politics