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Investigating the impact of London’s ultra low emission zone on children’s health: children’s health in London and Luton (CHILL) protocol for a prospective parallel cohort study
Get PDFBackground: Air pollution harms health across the life course. Children are at particular risk of adverse effects during development, which may impact on health in later life. Interventions that improve air quality are urgently needed both to improve public health now, and prevent longer-term increased vulnerability to chronic disease. Low Emission Zones are a public health policy intervention aimed at reducing traffic-derived contributions to urban air pollution, but evidence that they deliver health benefits is lacking. We describe a natural experiment study (CHILL: Children’s Health in London and Luton) to evaluate the impacts of the introduction of London’s Ultra Low Emission Zone (ULEZ) on children’s health. Methods: CHILL is a prospective two-arm parallel longitudinal cohort study recruiting children at age 6–9 years from primary schools in Central London (the focus of the first phase of the ULEZ) and Luton (a comparator site), with the primary outcome being the impact of changes in annual air pollutant exposures (nitrogen oxides [NOx], nitrogen dioxide [NO 2], particulate matter with a diameter of less than 2.5micrograms [PM 2.5], and less than 10 micrograms [PM 10]) across the two sites on lung function growth, measured as post-bronchodilator forced expiratory volume in one second (FEV 1) over five years. Secondary outcomes include physical activity, cognitive development, mental health, quality of life, health inequalities, and a range of respiratory and health economic data. Discussion: CHILL’s prospective parallel cohort design will enable robust conclusions to be drawn on the effectiveness of the ULEZ at improving air quality and delivering improvements in children’s respiratory health. With increasing proportions of the world’s population now living in large urban areas exceeding World Health Organisation air pollution limit guidelines, our study findings will have important implications for the design and implementation of Low Emission and Clean Air Zones in the UK, and worldwide. ClinicalTrials.gov: NCT04695093 (05/01/2021).</p
3D study of the vibrational behavior of lithic flint blades
Get PDFStone Age sites are well known to often contain many lithic flint blades and flakes, which may provide important information about early European Stone Age cultures and their environment. Understanding the mechanical behaviour of lithic flint blades represents an important problem for scientists in general and archaeologists in particular. In this study, the structural behaviour of lithic flint blades is studied. Ten specimens with different geometric shapes (tilted, curved, with bumping surfaces) were studied and tested. Their natural frequencies, damping ratios, and mode shapes (that is how the specimen deforms under any external excitation) are estimated using two models: an analytical model that accounts for the specimen's curvature and a 3D Finite Element (FE) method. Advanced experimental methods, including ultrasound techniques, were used to measure the mechanical properties of the specimens. The experimental set-up was built around a laser vibrometer that measured the specimen's displacement. The model predictions were compared with the experimental data to validate their effectiveness. A good agreement is observed between the models and the real data. It is particularly observed that despite their complicated geometries, the specimens still follow a structured pattern in their dynamic response. The presented study supports the use of acoustic methods as an effective tool to characterize and detect submerged prehistoric materials. This work contributes to the dynamic characterization of submerged Stone Age materials
Steps towards decolonising contact improvisation in the university
Get PDFTo engage critically in a process of decolonisation is complex in a postcolonial, globalised world in which migration, knowledge exchange, hybridity and fusion are commonplace. What is it to look openly to other cultures for inspiration and guidance while also holding anti-racist decolonising attitudes? How can contact improvisation (CI), for example, be decolonised? How are its foundations in postmodern dance, Buddhism and martial arts made sense of in current contemporary discourses of decolonisation? What is interesting about the development of CI is that despite its roots in the inclusive politics of the 1970s American counterculture, the form is acknowledged as predominantly white and yet it draws heavily upon aikido, and in the approaches developed by Nancy Stark Smith, Tibetan Buddhism. Recent thinking and research invite deeper examination of what it might mean to decolonise CI as a practice for the twenty-first-century curriculum. This chapter discusses the decolonisation of the teaching of CI in the university. When oppressions and obstacles are institutionally and systemically inherent, as with racism, it is not only ethically agile to develop teaching and learning dialogues that deconstruct such oppressions but ethically necessary.</p
Book review: Youth culture and the post-war novel: from teddy boys to Trainspotting
Get PDFReview of the book "Youth Culture and the Post-war Novel: From Teddy Boys to Trainspotting" by Ian Ross
Exploring the speaking construct in academic settings in a digital age
No full textThis study explored language functions and skills utilised in technology-mediated academic speaking contexts, which is timely given the increasing prevalence of digitally-mediated communication in higher education settings and the recent introduction of IELTS Indicator featuring a video-call mode in the Speaking Test. Using an embedded mixed-methods approach, the research involved: 1. language function analysis of spoken communication and simultaneous written chat contributions in online taught classes and supervision meetings 2. thematic analysis of students’ and lecturers’ understandings of distinctive features of online academic speaking and what constitutes successful online speaking interaction in those contexts. We analysed a total of over 40 hours of recordings, consisting of 17 video-recorded classes from four undergraduate and postgraduate units in an Australian University, and 23 video/audio recordings of online PhD supervision meetings from a UK university. This was followed by the administration of a questionnaire and semi-structured interviews with selected participants. In order to examine the construct of online academic communication, we adapted O’Sullivan et al.’s (2002) language function checklist for our purposes. Following the identification of language functions and skills observed in real-life online academic settings, we explored the synergy between the functions observed in online teaching and learning contexts and those elicited in the video-call IELTS Speaking Test (Nakatsuhara et al., 2021). Analyses of questionnaire and interview data helped us understand the skills perceived to be important for successful online interaction. The report concludes with a discussion on the multimodal construct of speaking in digitally-mediated academic contexts and the ways in which the findings of this study can be useful in informing the future development of IELTS Speaking Test tasks so that they remain representative of the reality of academic speaking in the digital age
‘County lines’:racism, safeguarding and statecraft in Britain
Get PDFGovernment policies relating to dealers in ‘county lines’ drugs trafficking cases have been welcomed as a departure from punitive approaches to drugs and ‘gang’ policing, in that those on the bottom rung of the drugs economy of heroin and crack cocaine are no longer treated as criminals but as potential victims and ‘modern slaves’ in need of protection. However, our research suggests not so much a radical break with previous modes of policing as that the term ‘county lines’ emerged as a logical extension of the government’s racist and classist language surrounding ‘gangs’, knife crime and youth violence. Policies implemented in the name of safeguarding the vulnerable also act as a gateway for criminalisation not just under drugs laws but also modern slavery legislation. The government’s discovery of, and responses to, ‘county lines’ hinge on a moral crisis in the making, which ultimately deepens the state’s pre-emptive and violent criminalisation of the ‘Black criminal other’ at a time of deep political crisis.</p
Children's care:family centred but child focused
No full textFamily-centred care is a widely used but loosely defined model of care often used in children's nursing. Although this allows for flexibility in its application, it also means that nurses can have very different ideas about its meaning. Recent decisions about the implementation of the COVID-19 vaccination programme for children under the age of 16 years in the UK and other countries have further confused this, as it has brought into question the relative position of children and their families in the decision-making process. Over time, the legislative and social positions of children have changed. Children are increasingly seen as being separate but related to their family, with an emphasis on their own human, legal, and ethical rights, including allowing children to choose the type of support they require for their care to reduce any undue stress. This article puts these into a current and contextual framework to better help nurses understand the historical as well as the contemporary reasons for the status of family-centred care today.</p
Comparison of deep learning classification models for facial image age estimation in digital forensic investigations
Get PDFThere has been a significant rise in digital forensic investigations containing Indecent Images of Children (IIoC), and one of the major challenges faced by investigators is the time-consuming task of manually investigating images for illicit content. In the UK, law enforcement maintains and uses a standard national repository of IIoC, known as CAID (Child Abuse Image Database), to identify known illegal images by matching their image hashes and metadata. The CAID plays a significant role in making IIoC investigations faster and more effective. However, all images that are not matched through using CAID require manual analysis. Every image has to be viewed and verified as IIoC by investigators. The victim age estimation in the images (i.e., determining whether they are juvenile or adult as this would change the course of the investigation) is a crucial part of this verification process and takes time due to a large number of images to inspect, therefore impacting the speed of the investigation, and consequently victims. This is a time-consuming and challenging task for human investigators. Previous work has demonstrated that deep learning has the capability to estimate age with high accuracy in images. This reduces the number of images that will need to be manually processed, thereby finishing the investigation faster. However, in terms of practical implementation in IIoC investigations, there is an absence of a comparative study using the same datasets to establish the most appropriate deep learning model and classification approach to use. This is important as different models have different capabilities and previous works utilise various binary, multi-class, and regression approaches. It is not yet known which is the most accurate for use in digital forensic investigations. In this paper, we construct an extensive dataset before experimenting with four pre-trained deep learning models: VGG16, ResNet50, Xception, and InceptionV3. We have identified that binary classification works best for the identification of images as a child or adult, with the ResNet50 obtaining the best results in terms of accuracy (91.70%) on unseen images.</p
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