Molecular dynamics simulation model for the quantitative assessment of tool wear during single point diamond turning of cubic silicon carbide

Silicon carbide (SiC) is a material of great technological interest for engineering applications concerning hostile environments where silicon-based components cannot work (beyond 623 K). Single point diamond turning (SPDT) has remained a superior and viable method to harness process efficiency and freeform shapes on this harder material. However, it is extremely difficult to machine this ceramic consistently in the ductile regime due to sudden and rapid tool wear. It thus becomes non trivial to develop an accurate understanding of tool wear mechanism during SPDT of SiC in order to identify measures to suppress wear to minimize operational cost.

In this paper, molecular dynamics (MD) simulation has been deployed with a realistic analytical bond order potential (ABOP) formalism based potential energy function to understand tool wear mechanism during single point diamond turning of SiC. The most significant result was obtained using the radial distribution function which suggests graphitization of diamond tool during the machining process. This phenomenon occurs due to the abrasive processes between these two ultra hard materials. The abrasive action results in locally high temperature which compounds with the massive cutting forces leading to sp3–sp2 order–disorder transition of diamond tool. This represents the root cause of tool wear during SPDT operation of cubic SiC. Further testing led to the development of a novel method for quantitative assessment of the progression of diamond tool wear from MD simulations.

Harmonic deformation of Delaunay triangulations

We construct harmonic functions on random graphs given by Delaunay triangulations of ergodic point processes as the limit of the zero-temperature harness process. (C) 2012 Elsevier B.V All rights reserved.

Learning through writing: Reconceptualising the research supervision process

This paper seeks to re-conceptualize the research supervision relationship. The literature has tended to view doctoral study in four ways: (i) as an exercise in self-management; (ii) as a research experience; (iii) as training for research, or; (iv) as an instance of student-centred learning. Although each of these approaches has their merits, they also suffer from conceptual weaknesses. This paper seeks to harness the merits — and minimize the disadvantages — by re-conceptualizing doctoral research as a ‘writing journey’. The paper utilizes the insights of new rhetoric in linguistic theory to defend a writing-centered conception of supervised research and offers some practical strategies on how it might be put into effect.

Can we harness computerised cognitive bias modification to treat anxiety in schizophrenia? A first step highlighting the role of mental imagery

A new wave of computerised therapy is under development which, rather than simulating talking therapies, uses bias modification techniques to target the core psychological process underlying anxiety. Such interventions are aimed at anxiety disorders, and are yet to be adapted for co-morbid anxiety in psychosis. The cognitive bias modification (CBM) paradigm delivers repeated exposure to stimuli in order to train individuals to resolve ambiguous information in a positive, rather than anxiety provoking, manner. The current study is the first to report data from a modified form of CBM which targets co-morbid anxiety within individuals diagnosed with schizophrenia. Our version of CBM involved exposure to one hundred vignettes presented over headphones. Participants were instructed to actively simulate the described scenarios via visual imagery. Twenty-one participants completed both a single session of CBM and a single control condition session in counter-balanced order. Within the whole sample, there was no significant improvement on interpretation bias of CBM or state anxiety, relative to the control condition. However, in line with previous research, those participants who engage in higher levels of visual imagery exhibited larger changes in interpretation bias. We discuss the implications for harnessing computerised CBM therapy developments for co-morbid anxiety in schizophrenia.

Structure, people and process challenges of mutichannel marketing : insights from marketers

The aim of this study was to explore the utility of strategic implementation theory as a guide for dealing with issues marketers face when implementing multichannel marketing. Although marketers attempt to harness the potential of emerging marketing channels, implementation is proving difficult. This is because the complexity of multichannel marketing has implications for existing organisational structures, people and processes. Further, the reliance on external suppliers and vendors in implementing new channels is causing organisational conflict and the development of new management processes. A qualitative research approach using insights from senior marketers of 'Bluechip' organisations was used to identify multichannel marketing implementation difficulties. The major contribution of this article was to show the areas for which strategic implementation theory provides practical implementation guidelines and future research directions.

Artspeak : articulating artistic process across cultural boundaries through digital theatre

In early 2009, researchers in the English Department of the University of Amsterdam collaborated with researchers in the Drama Department, Deakin University, Australia on a project which brought English as a Second Language students from The Netherlands into the rehearsal studio of Australian students engaged in play-building on Australian themes. The project aims were multiple and interconnected. We extended a language acquisition framework established by the Dutch investigators in previous collaborations with the Universities of Venice and Southampton, and combined this with an investigation of ways to harness technology in order to teach Australian students to communicate with and about their art. The Dutch language students were prompted to develop art-related language literacy (description, interpretation, criticism), through live, video-streamed interaction with drama students in Australia at critical points in the development of a group-devised performance (conception, rehearsal, performance). The Australian student improved their capacity to articulate the aims and processes which drove their art-making by illuminating the art-making process for the Dutch students, and providing them with a real-life context for the use of extended vocabulary whilst making them partners in the process of shaping the work. All participants engaged in the common task of assessing the capacity of the art work produced to communicate meaning to a non-Australian audience.

Harness race driver Patti Ahneman

General note: Title and date provided by Bettye Lane.

Harness race drivers

General note: Title and date provided by Bettye Lane.

Harness race driver

General note: Title and date provided by Bettye Lane.

Professional harness race driver

General note: Title and date provided by Bettye Lane.

Italian harness race driver Loredana Moretti

General note: Title and date provided by Bettye Lane.