The prevalence of pain in patients attending sarcoma outpatient clinics

The prevalence of pain in patients with sarcoma is not well documented. We investigated this in outpatients at a tertiary cancer referral centre, assessing the adequacy of pain control and for risk factors leading to higher prevalence and severity of pain. 149 patients were surveyed. Patients with pain within the previous 7 days completed pain assessment tools (BPI, S-LANSS, PMI). 53% of patients had pain within the previous 7 days, and 25% had significant pain. Of those with pain, 63% was inadequately controlled and neuropathic pain was identified in 36%. Age, gender, tumour type, and the type of cancer treatment were not significant predictors of the prevalence or severity of the pain. Based on our results, patients with sarcoma should be actively screened for pain and have regular reviews of their analgesic requirements.

Centrifugal separation and equilibration dynamics in an electron-antiproton plasma

Charges in cold, multiple-species, non-neutral plasmas separate radially by mass, forming centrifugally separated states. Here, we report the first detailed measurements of such states in an electron-antiproton plasma, and the first observations of the separation dynamics in any centrifugally separated system. While the observed equilibrium states are expected and in agreement with theory, the equilibration time is approximately constant over a wide range of parameters, a surprising and as yet unexplained result. Electron-antiproton plasmas play a crucial role in antihydrogen trapping experiments.

Patients' perspectives on medicines and pharmacy: views of patients with Type 2 diabetes

Focal points

Autoresonant excitation of antiproton plasmas

We demonstrate controllable excitation of the center-of-mass longitudinal motion of a thermal antiproton plasma using a swept-frequency autoresonant drive. When the plasma is cold, dense, and highly collective in nature, we observe that the entire system behaves as a single-particle nonlinear oscillator, as predicted by a recent theory. In contrast, only a fraction of the antiprotons in a warm plasma can be similarly excited. Antihydrogen was produced and trapped by using this technique to drive antiprotons into a positron plasma, thereby initiating atomic recombination.

Evaporative cooling of antiprotons to cryogenic temperatures

We report the application of evaporative cooling to clouds of trapped antiprotons, resulting in plasmas with measured temperature as low as 9 K. We have modeled the evaporation process for charged particles using appropriate rate equations. Good agreement between experiment and theory is observed, permitting prediction of cooling efficiency in future experiments. The technique opens up new possibilities for cooling of trapped ions and is of particular interest in antiproton physics, where a precise CPT test on trapped antihydrogen is a long-standing goal.

Media framing of graduated licensing policy debates

BACKGROUND

The overrepresentation of young drivers in road trauma statistics produces significant media interest. Graduated licensing restrictions involving night-time curfews and restrictions on passenger numbers are prominent topics within media coverage. This was particularly apparent in Australia between January 2004 and July 2008, when various models of either restriction were introduced in four states.

METHODS

Australian newspaper and Sydney free-to-air television coverage during the peak period were analysed to identify the framing strategies used by news actors supporting or opposing these policies.

RESULTS

Fifteen frames were identified. These predominantly assessed the proposed restrictions in terms of their need, evidence base, practicality and the degree to which they were consonant with 'commonsense' perceptions and had community support. While expert road injury reduction news actors primarily emphasised their moral imperative and likely effectiveness, opponents stressed their impracticality and proposed alternative solutions.

CONCLUSIONS

Research evidence is only one component of information presented as policy-relevant in policy discourse conducted in news media. Policy reform advocates using the media to advocate for evidence-based policies in road injury prevention need to appreciate that evidence is not the only currency exchanged in such debates and should study opponents' rhetoric in order to anticipate and counteract the framing strategies being used.

AIDS and dentistry in Australia: knowledge, infection control practices and attitudes to treatment in a random sample of Australian dentists

1130 dentists surveyed by mail from Australian capital cities (response rate 80%) answered a questionnaire on knowledge of clinical manifestations of AIDS and HIV, attitudes to treatment and referral of AIDS/HIV patients, infection control practices and personal risk factors for HIV. Despite a third of dentists being willing to treat HIV antibody-positive patients and 22% being willing to treat AIDS patients, over 50% believe AIDS to be a major problem for dentists, with two thirds claiming that their staff would not treat AIDS patients and 55% believing they would lose patients if word spread that they were treating HIV/AIDS patients. The perhaps irreconcilable tension between variable willingness to treat and the concerns of staff and other patients suggests that a policy of improving the dental referral network among people with AIDS may be in the best interests of the dental health and well-being of people with AIDS.

Faecal sterols analysis for the identification of human faecal pollution in a non-sewered catchment

In this study, faecal sterols were used to identify human faecal pollution in a non-sewered catchment in Southeast Queensland, Australia. In all, 36 water samples were collected from six sites on six occasions and the concentration of sterols were determined using gas chromatography and mass spectrometry. The stanols concentration in water samples generally increased with increased catchment runoff. After moderate rainfall, high coprostanols levels found in water samples indicated human faecal pollution via defective septic systems. In contrast, it appears that during dry weather human faecal pollution is not occurring in the study catchment. Sterol profiles also pointed to a cattle farm polluting during modest catchment runoff. The method used in this study was able to identify the sources of faecal pollution to the catchment due to rainfall.

Antiproton, positron, and electron imaging with a microchannel plate/phosphor detector

A microchannel plate (MCP)/phosphor screen assembly has been used to destructively measure the radial profile of cold, confined antiprotons, electrons, and positrons in the ALPHA experiment, with the goal of using these trapped particles for antihydrogen creation and confinement. The response of the MCP to low energy (10-200 eV, <1 eV spread) antiproton extractions is compared to that of electrons and positrons.

Focus group composition: a comparison between natural and constructed groups

OBJECTIVE

To provide insight into the effects of focus group composition.

METHOD

In an early phase of an ongoing study of parental reception to messages about childhood immunisation, we conducted four focus groups; two with participants who had never met before (constructed groups) and two with participants who were part of a pre-established first-time mothers' group (natural groups).

RESULTS

Marked differences were noted in the group dynamics, depth of interaction and diversity between groups. Discussions with constructed groups were animated, enthusiastic, expressed more divergent views and articulated greater complexities of the topic. Discussions with natural groups were generally flatter and less enthusiastic, displaying a higher level of apparent conformity to conventional wisdom. The need to protect other participants from potentially disturbing information about vaccination was expressed across groups but acted to censor natural groups, where participants knew more of each others' sensitivities.

IMPLICATIONS

Insight into the factors contributing to such differences may enhance understanding of the contexts in which constructed groups are more appropriate. The processes of social censorship may be of primary interest to the researcher. However, where it is paramount to elicit a range of opinions about a potentially controversial topic, we suggest that natural groups in the delicate stage of norming be avoided. The peculiarities of each individual research circumstance are best explored in pilot studies.

The Archaeotools project: faceted classification and natural language processing in an archaeological context

This paper describes 'Archaeotools', a major e-Science project in archaeology. The aim of the project is to use faceted classification and natural language processing to create an advanced infrastructure for archaeological research. The project aims to integrate over 1 x 10(6) structured database records referring to archaeological sites and monuments in the UK, with information extracted from semi-structured grey literature reports, and unstructured antiquarian journal accounts, in a single faceted browser interface. The project has illuminated the variable level of vocabulary control and standardization that currently exists within national and local monument inventories. Nonetheless, it has demonstrated that the relatively well-defined ontologies and thesauri that exist in archaeology mean that a high level of success can be achieved using information extraction techniques. This has great potential for unlocking and making accessible the information held in grey literature and antiquarian accounts, and has lessons for allied disciplines.