Discourse Analysis and Activist Social Work: Investigating Practice Processes

Although discourse analysis methods have been used for the critical analysis of activist practice theories, the application of these methods to practice processes has remained a largely unchartered territory. A chief aim of this paper is to demonstrate the possibilities discourse analysis offers for the investigation of activist practice processes. The paper introduces a discourse model which combines poststructural discourse principles and conversation analysis methods. The model is then applied to the study of the effects of activist perspectives for service users and workers within a context of activist practice in which one of the authors has been involved as a social worker. This analysis reveals the local interactions amongst workers and service users to be considerably more complex than has been allowed within activist practice discourses

The challenge of supporting networked personal inquiry learning across contexts

Supporting learning across different contexts can be challenging. Defining formal, informal and nonformal learning is the subject of continuing debate as each can be difficult to describe. We report on a study that evaluated the effectiveness of a Personal Inquiry toolkit on supporting personal inquiries into the sustainability of the food cycle, carried out across the contexts of home and an after school club in a UK secondary school. The toolkit consisted of a web-based Sustainability Investigator that could be accessed from any location, together with a selection of data-gathering tools such as environmental sensors (e.g. temperature probes) and cameras. It was designed to support students through the process of carrying out inquiries within the club and between the club and their home. Our main focus here is on describing how the Sustainability Investigator supported students' inquiries that were conceived and designed within the club and conducted at home. The 30 students (aged 12-14 years) chose to investigate home food storage, packaging and preservation. Our focus is on exploring the nature of the semi-formal club context and how this mediated students' use of the Sustainability Investigator. Analysis of our field notes, log files of students' use of the Sustainability Investigator, together with video and audio recordings of club sessions and interviews with teachers and pupils, suggest that while the pupils' use of the toolkit across contexts was sporadic and varied between students, they successfully completed personally relevant inquiries and developed positive attitudes to the process. This was different to the predictable, sustained and consistent use of the toolkit identified in our previous studies when the students used it (again successfully) to support their inquiries in a formal classroom setting (see e.g. Scanlon et al. 2009). Three main features of the school club context that mediated the ways in which the Sustainability Investigator was used by the students across contexts were: 1) the students' aims and priorities, 2) affordances and constraints of the technology, and 3) institutional priorities. We use this example of a study of learning across contexts to suggest implications of the work for the potential of a Personal Inquiry toolkit to support learning across the life course

Supporting location-based inquiry learning across school, field and home contexts

Here we explore how technology can be applied to support inquiry learning spanning a range of contexts. The development process of a location-based inquiry learning toolset is presented for a secondary school GCSE Geography project. The design framework used and the process of participatory development is discussed with regard to the co-development of the activities and tools involved in an inquiry project. The lessons learned relate to the formation of a motivational context for the inquiry; the role of personal data collection in the field; the use of bridging representations across field and classroom activities; and the development of flexible, re-usable tools to support and bridge sequences of activities

Challenges in personalisation: supporting mobile science inquiry learning across contexts

The Personal Inquiry project (PI) aimed to develop and implement personal inquiries in secondary schools in order to motivate engagement in scientific inquiry through its focus on inquiries of personal interest to young learners. This paper describes the authors’ experiences working with teachers in one school over three years, iteratively developing the nQuire toolkit* and pedagogical support across different inquiries which can be used in and across different contexts, ranging from the classroom to field trips and at home. As nQuire is web based, and can be accessed in different locations and on a range of networked devices it supports mobile inquiry learning and is the main resource for bridging between contexts. This paper discusses issues related to developing personal inquiries in schools, working across different contexts and focusing on three aspects of personalisation: choice, personal relevance and learner responsibility. It discusses the challenges faced when developing personalised inquiries in science, both in more traditional classroom contexts and in the less formal environment of an after school club. Drawing on technology supported inquiries from both these contexts it reflects on some of the constraints and tensions in providing learners with choice in their inquiries, identifying both the constraints and successes

Nitrite cycling in the primary nitrite maxima of the eastern tropical North Pacific

The primary nitrite maximum (PNM) is a ubiquitous feature of the upper ocean, where nitrite accumulates in a sharp peak at the base of the euphotic zone. This feature is situated where many chemical and hydrographic properties have strong gradients and the activities of several microbial processes overlap. Near the PNM, four major microbial processes are active in nitrite cycling: ammonia oxidation, nitrite oxidation, nitrate reduction and nitrite uptake. The first two processes are mediated by the nitrifying archaeal/bacterial community, while the second two processes are primarily conducted by phytoplankton. The overlapping spatial habitats and substrate requirements for these microbes have made understanding the formation and maintenance of the PNM difficult. In this work, we leverage high-resolution nutrient and hydrographic data and direct rate measurements of the four microbial processes to assess the controls on the PNM in the eastern tropical North Pacific (ETNP). The depths of the nitrite maxima showed strong correlations with several water column features (e.g., top of the nitracline, top of the oxycline, depth of the chlorophyll maximum), whereas the maximum concentration of nitrite correlated weakly with only a few water column features (e.g., nitrate concentration at the nitrite maximum). The balance between microbial production and consumption of nitrite was a poor predictor of the concentration of the nitrite maximum, but rate measurements showed that nitrification was a major source of nitrite in the ETNP, while phytoplankton release occasionally accounted for large nitrite contributions near the coast. The temporal mismatch between rate measurements and nitrite standing stocks suggests that studies of the PNM across multiple timescales are necessary.</p

Long-term impact of pneumococcal polysaccharide vaccination on nasopharyngeal carriage in children previously vaccinated with various pneumococcal conjugate vaccine regimes

Previously, the Fiji Pneumococcal Project (FiPP) evaluated reduced dose immunization schedules that incorporated pneumococcal protein conjugate and/or polysaccharide vaccine (PCV7 and 23vPPV, respectively). Immune hyporesponsiveness was observed in children vaccinated with 23vPPV at 12 months of age compared with children who did not receive 23vPPV.Here we assess the long-term impact of 23vPPV vaccination on nasopharyngeal carriage rates and densities of Streptococcus pneumoniae, Haemophilus influenzae, Staphylococcus aureus and Moraxella catarrhalis. Nasopharyngeal swabs (n = 194) were obtained from healthy children who participated in FiPP (now aged 5&ndash;7 years). S. pneumoniae were isolated and identified by standard culture-based methods, and serotyped using latex agglutination and the Quellung reaction. Carriage rates and densities of S. pneumoniae, H. influenzae, S. aureus and M. catarrhalis were determined using real-time quantitative PCR.There were no differences in the rate or density of S. pneumoniae, H. influenzae or M. catarrhalis carriage by PCV7 dose or 23vPPV vaccination in the vaccinated participants overall. However, differences were observed between the two main ethnic groups: Fijian children of Indian descent (Indo-Fijian) were less likely to carry S. pneumoniae, H. influenzae and M. catarrhalis, and there was evidence of a higher carriage rate of S. aureus compared with indigenous Fijian (iTaukei) children. Polysaccharide vaccination appeared to have effects that varied between ethnic groups, with 23vPPV vaccination associated with a higher carriage rate of S. aureus in iTaukei children, while there was a lower carriage rate of S. pneumoniae associated with 23vPPV vaccination in Indo-Fijian children.Overall, polysaccharide vaccination had no long-term impact on pneumococcal carriage, but may have impacted on S. aureus carriage and have varying effects in ethnic groups, suggesting current WHO vaccine schedule recommendations against the use of 23vPPV in children under two years of age are appropriate

Immunization coverage and risk factors for failure to immunize within the Expanded Programme on Immunization in Kenya after introduction of new Haemophilus influenzae type b and hepatitis b virus antigens

Background: Kenya introduced a pentavalent vaccine including the DTP, Haemophilus influenzae type b and hepatitis b virus antigens in Nov 2001 and strengthened immunization services. We estimated immunization coverage before and after introduction, timeliness of vaccination and risk factors for failure to immunize in Kilifi district, Kenya. Methods: In Nov 2002 we performed WHO cluster-sample surveys of > 200 children scheduled for vaccination before or after introduction of pentavalent vaccine. In Mar 2004 we conducted a simple random sample (SRS) survey of 204 children aged 9 - 23 months. Coverage was estimated by inverse Kaplan-Meier survival analysis of vaccine- card and mothers' recall data and corroborated by reviewing administrative records from national and provincial vaccine stores. The contribution to timely immunization of distance from clinic, seasonal rainfall, mother's age, and family size was estimated by a proportional hazards model. Results: Immunization coverage for three DTP and pentavalent doses was 100% before and 91% after pentavalent vaccine introduction, respectively. By SRS survey, coverage was 88% for three pentavalent doses. The median age at first, second and third vaccine dose was 8, 13 and 18 weeks. Vials dispatched to Kilifi District during 2001 - 2003 would provide three immunizations for 92% of the birth cohort. Immunization rate ratios were reduced with every kilometre of distance from home to vaccine clinic (HR 0.95, CI 0.91 - 1.00), rainy seasons ( HR 0.73, 95% CI 0.61 - 0.89) and family size, increasing progressively up to 4 children ( HR 0.55, 95% CI 0.41 - 0.73). Conclusion: Vaccine coverage was high before and after introduction of pentavalent vaccine, but most doses were given late. Coverage is limited by seasonal factors and family siz

Early indication for a reduced burden of radiologically confirmed pneumonia in children following the introduction of routine vaccination against Haemophilus influenzae type b in Nha Trang, Vietnam.

INTRODUCTION: Despite the global success of Hib vaccination in reducing disease and mortality, uncertainty about the disease burden and the potential impact of Hib vaccination in Southeast Asia has delayed the introduction of vaccination in some countries in the region. Hib vaccination was introduced throughout Vietnam in July 2010 without catch-up. In an observational, population based surveillance study we estimated the impact of routine Hib vaccination on all cause radiologically confirmed childhood pneumonia in Nha Trang, Vietnam. MATERIALS AND METHODS: In 2007 active hospital based surveillance was established in Khanh Hoa General Hospital, the only hospital in Nha Trang, Khanh Hoa province. Nasopharyngeal samples and chest radiographs are taken routinely from all children diagnosed with acute respiratory illness on admission. For admissions between 02/2007 and 03/2012 chest radiographs were interpreted for the presence of WHO primary endpoint pneumonia and nasopharyngeal swabs were analysed by PCR for the presence of Influenza A or B, RSV and rhinovirus. We employed Poisson regression to estimate the impact of Hib vaccination on radiologically confirmed pneumonia (RCP) while statistically accounting for potential differences in viral circulation in the post vaccination era which could have biased the estimate. RESULTS: Of 3151 cases admitted during the study period, 166 had RCP and major viruses were detected in 1601. The adjusted annual incidence of RCP in children younger than 5 years declined by 39% (12-58%) after introduction of Hib vaccination. This decline was most pronounced in children less than 2 years old, adjusted IRR: 0.52 (0.33-0.81), and no significant impact was observed in the 2-4 years old who were not eligible for vaccination, adjusted IRR: 0.96 (0.52-1.72). DISCUSSION: We present early evidence that the burden of Hib associated RCP in Nha Trang before vaccination was substantial and that shortly after introduction to the routine childhood immunisation scheme vaccination has substantially reduced that burden