Two-dimensional turbulence cross-correlation functions in the edge of NSTX

The 2-D radial vs. poloidal cross-correlation functions of edge plasma turbulence were measured near the outer midplane using the gas puff imaging (GPI) diagnostic on NSTX. These correlation functions were evaluated at radii r= 0 cm, ±3 cm, and ±6 cm from the separatrix and poloidal locations p=0 cm and ±7.5 cm from the GPI poloidal center line for 20 different shots. The ellipticity ε and tilt angle φ of the positive cross- correlation regions, and the minimum negative cross-correlation “cmin” and total negative over positive values “neg/pos” were evaluated for each of these cases. The average results over this data set were ε=2.2±0.9, φ=87±34o (i.e. poloidally oriented), cmin= -0.30±0.15, and neg/pos=0.25±0.24. Thus there was significant variation in these correlation results within this database, with dependences on the location within the image, the magnetic geometry, and the plasma parameters. Possible causes for this variation are discussed, including the misalignment of the GPI view with the local B field line, the magnetic shear of field lines in the edge, the poloidal flow shear of the turbulence, blob-hole correlations, and the neutral density ‘shadowing’ effect in GPI.readme and data file

Workforce development and challenging behaviour : training staff to treat, to manage or to cope?

Staff working directly with adults challenging behaviours in learning disability services need to be very good at what they do. They also need to want to do the job. A theory-practice gap exists, however, between what is known about effective, evidence-based approaches and whether and how these are used in person-centred, community services. Many front line staff working with people with the most serious challenging behaviours do not have the skills to implement programmes to change behaviour. This discussion paper reviews workforce development in the context of clinical and service guidelines and asks whether the legitimate purview of frontline staff is a balance of treating challenging behaviour, managing it or to simply coping with it on a daily basis, whilst maintaining the best quality of life possible for service users.PostprintPeer reviewe

Socially valid outcomes of intervention for people with mental retardation and challenging behaviour : a preliminary descrptive analysis of the views of different stakeholders.

Potentially salient outcomes of intervention for challenging behavior shown by people with mental retardation (MR) were identified by focus groups and through a literature review. Items generated by this process were subsequently rated by 150 respondents from seven stakeholder groups: 28 people with MR, 9 parents of people with MR, 22 clinical psychologists, 7 psychiatrists, 31 nurses, 33 managers, and 20 direct support workers. Results indicated that reduction in the severity of challenging behavior was considered the most important outcome of intervention for a child/young adult living with his or her family by four of the seven stakeholder groups; reduction in the severity of challenging behavior was considered the most important outcome of intervention for an adult living in a community-based group home by three of the seven stakeholder groups; alternative outcomes considered to be the most important by stakeholder groups included increased friendships and relationships, changes in the perceptions of individuals by others, learning of alternative ways of getting needs met, increased control, and empowerment; there were moderate levels of agreement on the relative importance of outcomes between individual members of stakeholder groups who did not have MR; there were high levels of agreement on the relative importance of outcomes between stakeholder groups of people who did not have MR; and levels of agreement on the relative importance of outcomes between people with MR and members of all other stakeholder groups did not reach the level of statistical significance

Flavours of intrinsic d-wave induced effects in YBa2Cu3O7-d grain boundary Josephson junctions

The quality of YBa2Cu3O7−δ biepitaxial grain boundary Josephson junctions has been improved and ‘tunnel-like’ characteristics are reproducibly obtained. The consequent low barrier transmission probabilities are apparently favourable to isolate intrinsic d-wave induced effects. Extrinsic and intrinsic d-wave effects are discussed within the framework of novel designs for π-circuitry and qubits

Molluscan diversity caught by trawling fisheries: a case study in southern Portugal

The effects of commercial trawling on the malacological communities (except for the Cephalopoda) were examined, based on a study undertaken between 1996 and 2000 on the continental shelf and slope of southern Portugal. More than 50% of species caught by trawling in southern Portugal were discarded, with molluscs representing about 19%. Forty-four species of molluscs (15 bivalves, 28 gastropods and one polyplacophoran) were identified from the discarded specimens. Crustacean trawlers accounted for 34 molluscs species, and fish trawlers for 24. Twenty species were only caught by the crustacean trawl, compared with 10 species by the fish trawl, and 14 species were common to both trawls. The bivalve Venus nux Gmelin was the most numerous species discarded in the fish trawl, accounting for 42.0% of the total number of individuals, followed by the gastropods Ampulla priamus (Meuschen) (7.8%) and Ranella olearium (L.) (7.3%). In the crustacean trawl, the most numerous species discarded were the bivalve Anadara diluvii (Lamarck) (19.4%), the gastropod Calliostoma granulatum (Born) (15.5%), and the bivalve V. nux (15.1%). The third most discarded species from fish trawls in Algarve waters, the gastropod species R. olearium, is a species listed in Annex II of the Bern Convention. The difficulties of managing the real impact of fisheries on the molluscan populations and in defining a conservation strategy are discussed