2,443 research outputs found

    Reducing dose for digital cranial radiography : The increased source to the image-receptor distance approach

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    This investigation proposes that an increased source to the image-receptor distance (SID) technique can be used to optimize occipital frontal and lateral cranial radiographs acquired with direct digital radiography. Although cranial radiography is not performed on a routine basis, it should nonetheless be optimized to keep the dose to the patient as low as reasonably achievable, particularly because it can form part of the facial bone and sinus series. Dose measurements were acquired at various SIDs, and image quality was assessed using visual grading analysis. Statistically significant reductions in the effective dose between 19.2% and 23.9% were obtained when the SID was increased from the standard 100 to 150 cm (P ≀.05), and visual grading analysis scores indicate that image quality remained diagnostically acceptable for both projections. This investigation concludes that increasing the SID effectively optimizes occipital frontal and lateral skull radiographs. Radiology departments must be advised of the benefits of this technique with the goal of introducing an updated reference SID of 150 cm into clinical practice.Peer reviewe

    The Seroepidemiology of Haemophilus influenzae Type B Prior to Introduction of an Immunization Programme in Kathmandu, Nepal.

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    Haemophilus influenzae type b (Hib) is now recognized as an important pathogen in Asia. To evaluate disease susceptibility, and as a marker of Hib transmission before routine immunization was introduced in Kathmandu, 71 participants aged 7 months-77 years were recruited and 15 cord blood samples were collected for analysis of anti-polyribosylribitol phosphate antibody levels by enzyme-linked immunosorbent assay. Only 20% of children under 5 years old had levels considered protective (>0.15 ”g/ml), rising to 83% of 15-54 year-olds. Prior to introduction of Hib vaccine in Kathmandu, the majority of young children were susceptible to disease

    Editors' introduction: neoliberalism and/as terror

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    The articles in this special issue are drawn from papers presented at a conference entitled “Neoliberalism and/as Terror”, held at the Nottingham Conference Centre at Nottingham Trent University by the Critical Terrorism Studies BISA Working Group (CSTWG) on 15-16 September 2014. The conference was supported by both a BISA workshop grant and supplementary funds from Nottingham Trent University’s Politics and International Relations Department and the Critical Studies on Terrorism journal. Papers presented at the conference aimed to extend research into the diverse linkages between neoliberalism and terrorism, including but extending beyond the contextualisation of pre-emptive counterterrorism technologies and privatised securities within relevant economic and ideological contexts. Thus, the conference sought also to stimulate research into the ways that neoliberalism could itself be understood as terrorism, asking - amongst other questions - whether populations are themselves terrorised by neoliberal policy. The articles presented in this special issue reflect the conference aims in bringing together research on the neoliberalisation of counterterrorism and on the terror of neoliberalism

    Detecting the start of an influenza outbreak using exponentially weighted moving average charts

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    Background. Influenza viruses cause seasonal outbreaks in temperate climates, usually during winter and early spring, and are endemic in tropical climates. The severity and length of influenza outbreaks vary from year to year. Quick and reliable detection of the start of an outbreak is needed to promote public health measures. Methods. We propose the use of an exponentially weighted moving average (EWMA) control chart of laboratory confirmed influenza counts to detect the start and end of influenza outbreaks. Results. The chart is shown to provide timely signals in an example application with seven years of data from Victoria, Australia. Conclusions. The EWMA control chart could be applied in other applications to quickly detect influenza outbreaks

    Residual susceptibility to measles among young adults in Victoria, Australia following a national targeted measles-mumps-rubella vaccination campaign

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    <p>Abstract</p> <p>Background</p> <p>Past measles immunisation policies in Australia have resulted in a cohort of young adults who have been inadequately vaccinated, but who also have low levels of naturally acquired immunity because immunisation programs have decreased the circulation of wild virus. A measles-mumps-rubella (MMR) immunisation campaign aimed at addressing this susceptibility to measles among young adults was conducted in Australia in 2001–2. By estimating age-specific immunity, we aimed to evaluate the success of this campaign in the state of Victoria.</p> <p>Methods</p> <p>We conducted serosurveys after the young adult MMR program at state and national levels to estimate immunity among young adults born between 1968–82. We compared results of the Victorian (state) surveys with the Victorian component of the national surveys and compared both surveys with surveys conducted before the campaign. We also reviewed all laboratory confirmed measles cases in Victoria between 2000–4.</p> <p>Results</p> <p>The Victorian state serosurveys indicated no significant change in immunity of the cohort following the young adult MMR campaign (83.9% immune pre and 85.5% immune post campaign) while the Victorian component of the national serosurvey indicated a significant decline in immunity (91.0% to 84.2%; p = 0.006). Both surveys indicated about 15% susceptibility to measles among young Victorian adults after the campaign. Measles outbreaks in Victoria between 2000–4 confirmed the susceptibility of young adults. Outbreaks involved a median of 2.5 cases with a median age of 24.5 years.</p> <p>Conclusion</p> <p>In Victoria, the young adult MMR program appears to have had no effect on residual susceptibility to measles among the 1968–82 birth cohort. Young adults in Victoria, as in other countries where past immunisation policies have left a residual susceptible cohort, represent a potential problem for the maintenance of measles elimination.</p

    Coastal oceanography and sedimentology in New Zealand, 1967-91.

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    This paper reviews research that has taken place on physical oceanography and sedimentology on New Zealand's estuaries and the inner shelf since c. 1967. It includes estuarine sedimentation, tidal inlets, beach morphodynamics, nearshore and inner shelf sedimentation, tides and coastal currents, numerical modelling, short-period waves, tsunamis, and storm surges. An extensive reference list covering both published and unpublished material is included. Formal teaching and research programmes dealing with coastal landforms and the processes that shape them were only introduced to New Zealand universities in 1964; the history of the New Zealand Journal of Marine and Freshwater Research parallels and chronicles the development of physical coastal science in New Zealand, most of which has been accomplished in last 25 years

    'Making a Difference': Volunteer Tourism and Development,

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    Abstract: In recent decades there has been a boom in international volunteer tourism, mainly in the form of the growth of gap-year companies offering placements, linked to conservation and community well-being goals. This paper makes two points: firstly, it argues that the growth of volunteer tourism is in part a product of the politics of the current period – the decline of grand narratives and the growth of ‘life political’ alternative forms of agency. Hence volunteer tourism, motivated by the impulse to ‘make a difference’, tells us something about the way in which development issues are being conceived of by idealistic young people who comprise the majority of volunteer tourists. Secondly, the paper takes issue with the view that today’s volunteer tourists are part of a tradition of colonialism and neo-colonialism that projects western conceptions of modernization onto the Third World societies to the detriment of the latter. Rather, it is argued that the politics behind volunteer tourism is better characterized as a rejection of modernization as development in favour of a post-development influenced approach. Keywords: volunteer tourism; life politics; gap-year; ethical consumption; tourism and development

    The values of liberté, égalité, fraternité fifty years on: why the 'free speech' debate makes it even less likely that Mai '68 could happen in Britain now than it was then

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    In May 1968 there was a strong sense of left-wing camaraderie that drew many French university students into collaboration with the workers’ unions to rise up against de Gaulle’s government. It is highly unlikely that British campuses could be gripped by these values of solidarity and shared agency in a common cause: what can that tell us about Britain? In Britain there are assumptions on the part of many young adults that we are free, equal and fraternal. The parallel digital world that they inhabit so comfortably appears to encourage and facilitate consumer behaviour and freedom of expression: it seems possible to buy and write online almost exactly what you like without consequences. Yet against a backdrop of crass populist discourse there are urgent issues regarding ethical behaviour: online and offline use of language is sharply racialised and gendered. People of colour and women of all ages are frequently attacked. Hate speech is poorly controlled and legal restraints are lagging behind the global digital empires. In addition, on campus the British government is intervening much more than ever before, which makes some students less free, less equal and less fraternal than others. Free speech is being constrained. Populism is on the rise, framed by political alienation. Finally, precarity affects the young in their responses to university: is it worth incurring the debt of high fees? The philosophy of Ricoeur and Lorey show how to interrogate dominant discourses and attempt a better world
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