Two particles on a star graph II

We consider a two particle system on a star graph with delta-function interaction. A complete description of the eigensolutions with real momenta is given; specifically it is shown that all eigensolutions can be written as integrals in the momentum plane of sums of products of appropriate one particle solutions.Comment: typos corrected, minor changes, journal ref adde

Attitude, aptitude, ability and autonomy: ther emergence of "off-roaders", a special class of nomadic worker

This is an electronic version of an article published in Harmer, B. M., & Pauleen, D. J. (2010). Attitude, aptitude, ability and autonomy: the emergence of ‘offroaders’, a special class of nomadic worker. Behaviour & Information Technology, 1-13. http://dx.doi.org/10.1080/0144929x.2010.489117 Behaviour & Information Technology is available online at: www.tandfonline.comFreedom to choose when, where and on what to work might be viewed as mere telework. However, when we mix the adoption of ubiquitous technologies with personalities that take pleasure in problem solving and achievement for its own sake, a strong need for autonomy, the freedom to work wherever and whenever the mood strikes, and add a dash of entrepreneurial spirit, then perhaps we are seeing an emergent class of worker, and even the possibility of new organisational forms. This research draws on adaptive structuration theory to search for evidence of a different way of working, hidden among otherwise familiar patterns. It concludes by considering what implications the employment of such individuals might have for management processes with organisations

Improvement in the Nitrogen Use Efficiency and Uptake of Perennial Ryegrass (\u3cem\u3eLolium perenne\u3c/em\u3e) Caused by the \u3cem\u3eEpichloë\u3c/em\u3e Fungal Endophyte AR37

The forage yield and pasture persistence benefits of Epichloë fungal endophyte strain AR37 (AR37) in high rainfall perennial ryegrass (Lolium perenne) pastures in Australia and New Zealand are recognised. However, the effect of beneficial endophytes on nitrogen (N) use efficiency, yield response to applied N and N uptake had not been determined. To investigate this, a replicated trial was managed for three years under irrigation in southern Australia. Five N application rates (0, 20, 40, 80 and 160 kg N/ha) were applied every second harvest to a tetraploid perennial ryegrass variety with and without AR37. Ryegrass biomass was determined by full plot harvest and N percentage determined by near infrared spectroscopy. AR37 caused an increase in perennial ryegrass N use efficiency (the slope of the N response function) in all seasons, with the average increase in marginal response being 2.1 kg DM/kg N or 29.6 % over three-years. Benefit at individual harvests ranged from 0.2 to 6.5 kg DM/kg N. Foliage N percentage was not influenced by AR37 infection, thus AR37 caused enhanced N uptake due to increased forage yield. This trial demonstrates AR37 can contribute to the profitable and sustainable intensification of high rainfall perennial ryegrass pastures by significantly increasing the marginal yield response to N, and the uptake of applied N fertiliser. Further, increased N uptake caused by AR37 will likely have implication for negative environmental externalities associated with N use (leaching, runoff and nitrogenous greenhouse gas emissions) which warrants further investigation, along with research to clarify biotic and abiotic drivers of observed results