Category / Research themes

Password? Not another one!

The increasing volume of academic activity on the internet coupled with a growing obsession about privacy and data protection means for many academics a rapidly expanding number of online accounts and associated passwords. This is, of course, over and above our regular dose of accounts and passwords as citizens of the virtual world. The average adult in the UK must have at least 25 internet accounts, for the bank/building society, supermarkets, phone companies, social media, airlines, trains, insurance companies, eBay, the website of the parents’ council of your children’s school, your electricity provider, the council tax, etc.

I feel as an academic, the burden is even worse. Every single time another scientific journal invites me to review a paper it opens an on-line account for me. Every time I apply for a grant from a funding body to which I have not previously applied, I am required to set up an account with a new password. When you apply for 20-odd grants every year and review manuscripts for a similar number of different journals the number of accounts and passwords add up rapidly. Then there are the other accounts and passwords related to work for sites such as this BU Research Blog, BRIAN, Survey Monkey, for the university for whom you act as external examiner, for Drop Box, the British Library, ORCIC, ACADEMIA.EDU, ResearchGate, Researchfish, Linkedin, and the list goes on.

These last few months I was reminded how non user friendly some systems are. First, I received new secure email account for my part on a REF sub-panel. The account name chosen for me is different from what I would have chosen and what I am used to at Bournemouth University. The importance of confidentiality for the REF work is clear so my password has to be different from anything I use elsewhere. Secondly, a few weeks later I attempted to put my name done for the tri-annual conference of the International Congress of Midwifery in Prague next year. It turns out you cannot join the conference without opening an on-line account first. The account name was automatically chosen for me and so was the password. Unfortunately, both are impossible to remember, neither the account name nor the password (which was case sensitive) were ones I would have selected personally.

There is some hope as some journals allow you to choose your own account name and password. Elsevier has brought most of its journals into one account, with your own email as the account name and all with the same password. Similarly a group of English-language journals in Nepal called Nepal Journals OnLine (NepJOL) use one account name for all participating journals. For the rest of my account names and passwords I can only follow the advice given by Stephen Fry on an episode of QI: “Write it down somewhere on a piece of paper”. The underlying idea is that the people who try to steal your internet account details sit in a bedsit in London or Hong Kong and won’t come to your office or living room to steal a piece of paper with computer addresses. The people who try to break into your house or office are looking for objects with a street value, such as your TV, phone or laptop, they are generally not interested in a piece of paper with some scribbles on it.

Prof. Edwin van Teijlingen

Centre for Midwifery, Maternal & Perinatal Health

Jib Acharya awarded funded place on Scaling Up Nutrition (SUN) workshop in Morocco


Congratulations to Health & Social Care PhD student Mr. Jib Acharya who has been offered a funded place at the Scaling Up Nutrition (SUN) workshop. The SUN workshop will be held in Morocco in early February 2014. The British Council and CNRST have launched a new five-year programme to encourage international research collaboration between ambitious young researchers from the UK and eighteen countries around the world. The forthcoming SUN workshop is a part of this programme. One leading team of researchers from the University of Southampton and from Morocco proposed this bilateral workshop to be held in Morocco to bring together early career researchers to discuss their research and start to build international relationships.

The selection committee wrote to Mr. Acharya: “the selection was challenging. The selection panel (UK and Moroccan coordinators and mentors), has chosen 16 applications that would contribute to and benefit from the workshop most”. The British Council and CNRST will cover the costs related to the participation to the workshop, including: travel (both international and local), visa, accommodation and meals.
Jib is delighted with his award. He commented: “It will give me a chance to build up networks with participants at this workshop. It will help to establish personal and institutional relationships.”

Jib’s PhD thesis is based on A comparative Study on Nutritional Problems in Preschool Aged Children of Kaski District of Nepal. His research applies a mixed-methods approach and he is supervised by a team of three BU supervisors: Dr. Jane Murphy, Prof. Edwin van Teijlingen, and Dr. Martin Hind.

Service Computing Seminar: Servicing Big Data

As part of the Service Computing Seminar (SCS) project, funded by Bournemouth University Fusion Investment Fund, we would like to invite you to the Service Computing Seminar

Title: Servicing Big Data

Time: 14:00-16:00 Wednesday, 18 Dec. 2013

Venue: PG143 (Thomas Hardy Suite, Talbot Campus)

Speaker: Prof. Athman Bouguettaya, Head of School of Computer Science and Information Technology at RMIT University, Melbourne, Australia

 

Abstract

Big data is here and in a big way.  Big data is coming from all sorts of sources and means, including sensors, deep space, social media, smartphones, genomic, etc.  The cloud has been instrumental supporting the storage and processing of the ever increasing amount of data.  “Domesticating” the data, i.e., making it useful, however, has been a major challenge.  Service computing is the next major evolution of computing that aims at transforming massive data into artefacts that are acted upon, i.e., services. Service computing is increasingly being recognized as part of a broader agenda in Service Science. In that respect, service computing may be viewed as the “engineering” side of service science. Service computing broadly focuses at providing a foundational framework to support a service-centric view of designing, developing, and exposing data (and applications), whether it is in the enterprise or on the Web. In that respect, the Web is and will undoubtedly be the preferred delivery platform of service-based solutions. More specifically, Web services are currently without contest the key enabler for deploying service-centric solutions. Fully delivering on the potential of next-generation Web services requires building a foundation that would provide a sound design for efficiently developing, deploying, publishing, discovering, composing, trusting, and optimizing access to Web services in an open, competitive, untrustworthy, and highly dynamic environment. The Web service foundation is the key catalyst for the development of a uniform framework called Web Service Management System (WSMS). In this novel framework, Web services are treated as first-class objects. In this talk, I will first motivate the need for a uniform service management to service big data. I will then overview the core components of a typical WSMS. I will conclude by describing our latest research servicing sensor data.

 

Short Bio

Athman Bouguettaya is Professor and Head of School of Computer Science and Information Technology at RMIT University, Melbourne, Australia. He received his PhD in Computer Science from the University of Colorado at Boulder (USA) in 1992.  He was previously Science Leader in Service Computing at CSIRO ICT Centre, Canberra. Australia. Before that, he was a tenured faculty member and Program director in the Computer Science department at Virginia Polytechnic Institute and State University (commonly known as Virginia Tech) (USA).  He is a founding member and past President of the Service Science Society, a non-profit organization that aims at forming a community of service scientists for the advancement of service science. He is on the editorial boards of several journals including, the IEEE Transactions on Services Computing, ACM Transactions on Internet Technology, the International Journal on Next Generation Computing, VLDB Journal, Distributed and Parallel Databases Journal, and the International Journal of Cooperative Information Systems. He is also on the editorial board of the Springer-Verlag book series on Services Science.  He served as a guest editor of a number of special issues including the special issue of the ACM Transactions on Internet Technology on Semantic Web services, a special issue the IEEE Transactions on Services Computing on Service Query Models, and a special issue of IEEE Internet Computing on Database Technology on the Web. He served as a Program Chair of the 2012 International Conference on Web and Information System Engineering, the 2009 and 2010 Australasian Database Conference, 2008 International Conference on Service Oriented Computing (ICSOC) and the IEEE RIDE Workshop on Web Services for E-Commerce and E-Government (RIDE-WS-ECEG’04). He has published more than 170 books, book chapters, and articles in journals and conferences in the area of databases and service computing (e.g., the IEEE Transactions on Knowledge and Data Engineering, the ACM Transactions on the Web, WWW Journal, VLDB Journal, SIGMOD, ICDE, VLDB, and EDBT). He was the recipient of several federally competitive grants in Australia (e.g., ARC) and the US (e.g., NSF, NIH). He is a Fellow of the IEEE and a Distinguished Scientist of the ACM.

BU present at European Midwives Association Education Conference

At the end of November Stella Rawnson and Catherine Angell (both Senior Lecturer in Midwifery at BU) attended the European Midwives Association Education Conference in Maastricht, the Netherlands. This two-day event brought together 300 midwife educators from universities across Europe, from Norway to Greece and Ireland to Hungary.

Stella presented ‘The best people for the job’ which focused on our experience of introducing new methods for assessing the suitability of applicants to BU’s BSc Midwifery programme. This generated a considerable amount of interest and discussion. It was clear that student selection was an issue for educators from a wide range of countries, both in terms of identifying competence in numeracy and literacy but also assessing applicants’ communication and ‘people skills’.

Catherine’s presentation was entitled ‘Loosing the luggage; strategies that enable effective learning around infant feeding for student midwives’. This identified how we have used education theories to develop a programme that enables students to ‘unlearn’ negative or unrealistic ideas about infant feeding before embarking on new learning around this subject. This fitted well with a key theme that emerged from the conference relating to the role of emotion in enabling and blocking learning.

The conference included keynote presentations from Prof. Cees van der Vleuten, who spoke about evaluation and assessment of health sciences students, and Prof. Raymond DeVries who discussed the value of academic skills in midwifery. The conference highlighted the considerable differences in terms of length of midwifery programme, entry route and content between different countries in the EU. However, it also enabled us to learn from sharing some of the challenges that we experience in areas such as recruitment and assessment, and in terms of developing curriculums against shifting models of care and changing political priorities. Naturally it also provided an excellent opportunity for networking and identifying potential collaborations.

Winter in Maastricht

Winter in Maastricht

Cyber Security Seminars: Suggestions for Speakers and Topics

If you have been following my previous posts then you will know that today is the final Cyber Security Seminar for this semester.  We hope you have found the seminar series interesting so far.

We are currently planning the seminars for next semester.  Please get in touch if you have suggestions for potential speakers, or topics you would like to hear more about. Although the budget we have available is modest, we will do our best to accommodate your suggestions.

SDRC New Research/Education Resource

SDRC has added a new fluid property research and education resource to its experimental lab. This resource will be deployed in the current on-going research in renewable technology and coupled with the MEng/BEng Level I thermodynamics & heat transfer unit. This will provide opportunity to realise BU Fusion initiative through research informed education.

Description

The F1-30 Fluid Property Apparatus is part of the Engineering Teaching & Research Equipment in SDRC. It consists of a collection of components that demonstrate individual fluid properties:

  • Density and relative density (specific gravity)
  • Viscosity
  • Capillarity – capillary elevation between flat plates and in circular tubes
  • Buoyancy (Archimedes principle)
  • Atmospheric pressure

For education purpose, it can introduce students a clear understanding about the physical properties of fluids that can build the foundation for them to study the behaviour of fluids in static or dynamic applications.

For research purpose, it allows bench tests to be performed for measuring physical properties of fluids from a wide range of applications.

Measuring Capabilities

  • Measuring fluid density and relative density (specific gravity) of a liquid using a universal hydrometer
  • Measuring fluid viscosity using a falling sphere viscometer
  • Measuring fluid density and relative density (specific gravity) of a liquid using a pycnometer (density bottle)
  • Observing the effect of capillary elevation between flat plates
  • Measuring the effect of capillary elevation inside capillary tubes
  • Verifying Archimedes principle using a brass bucket & cylinder with a lever balance
  • Measuring atmospheric pressure using an aneroid barometer

If you would like to know more about the research and education activities within the SDRC themes please contact

Dr Zulfiqar Khan (Associate Professor)

Email: zkhan@bournemouth.ac.uk

Cyber Security Seminar: Approaching the Measurement of User Security Behaviour in Organisations

Our final Interdisciplinary Cyber Security Seminar this semester will take place on Tuesday, 10th December at 5pm. The seminar will take place in EB202 in the Executive Business Centre, and will be free and open to all. If you would like to attend, please register at https://www.eventbrite.co.uk/e/interdisciplinary-seminar-in-cyber-security-tickets-9688353125

Our speaker will be Dr. Simon Parkin from UCL. Simon is a Senior Research Associate in the Information Security group at University College London, contributing to the Productive Security project within the Research Institute in the Science of Cyber Security (RISCS). He was previously a member of the Innovation Team at Hewlett Packard Enterprise Security Services (HP ESS) until mid-2012. From 2007 to 2011, Simon was a Postdoctoral Research Associate in the School of Computing Science at Newcastle University, where he also obtained his PhD. His research interests include: IT-security policy management metrics, models and tools; holistic IT-security management principles, and; IT-security risk management approaches and knowledge formalisation.

Abstract: Individuals working within organisations must complete their tasks, and are often expected to do so using secured IT systems. There can be times when the expectations for productivity and security are in competition, and so how would an organisation measure the outcomes in practice? We will review a series of interdisciplinary research efforts that characterise the human factor in IT-security within large organisations, as part of a holistic view of security. There are furthermore a variety of modelling approaches and frameworks that have emerged and informed this view. We will consider the challenges that remain in affording measurement of the human factor in IT-security within organisations, and some of the changes that are required for such activities to be sustainable and effective.

Media and Information Education in the UK: Recommendations to the European Union

Dr Julian McDougall from BU’s Centre for Excellence in Media Practice (CEMP) will make recommendations on UK media education at a conference in Paris later this month.

The conference brings together comparative analyses on media and information education from EU member states and Dr McDougall will present the UK report alongside his London School of economics (LSE) research collaborators.

Dr McDougall said: “In the UK report, we have mapped media education provision in the UK against the various EC and EU frameworks and draw a clear conclusion, that the UK is rich with expertise, energy and leadership for media and information education, and to a significant extent is the envy of other European nations in this respect, but deeply entrenched prejudice against ‘media studies’ means that promoting media literacy through schools is continually undermined.”

The report examines the progression of media education through three key phases:

  • Pre-OFCOM: the establishment of Media Studies, Film Studies and other related areas in the curriculum.
  • 1997 – 2011 New Labour Government and OFCOM media literacy intervention with some correspondence to Media Studies
  • Post-OFCOM Coalition Government, discontinuation of media literacy strategies

When examining the current ‘state of play’ in UK media literacy education, Dr McDougall and his colleagues looked at four areas: the study of media in formal secondary and higher education through curriculum subjects such as Media Studies, Film Studies and Media/non-literary textual analysis in English as well as vocational courses; broader, less formal examples of media literacy across the UK curriculum and extra-curricular activities such as literacy education in primary schools and related subjects like Citizenship, Sociology and History; e-safety policies in the school system; and media & information literacy outside of formal education.

Having examined the current scope and provision of UK media education and media literacy, the report identifies a scarcity of funding and training and a contradiction between support for creative industry employability, digital literacy and e-safety and derision towards, neglect of and undermining (through UCAS tariff distinctions, for example) media education where it already exists for thousands of young people.

At the same time, the recent Next Gen Report, well received by policy-makers, fails to locate media education as a context for teaching digital programming and coding. The UK report predicts that the combined effect of proposed secondary curriculum reform and this response to the Next Gen report will place UK media education in further ‘limbo’ between the cultural value afforded to English Literature and Art as academic /creative disciplines for their own sake and the vocational importance of strong media and technological literacy, such as those assumed for games and effects education within the STEM subject cluster, in today’s modern  media-saturated tech-savvy workplace.

Three clear and compelling recommendations are presented from the UK report’s findings:

  • The model of media literacy currently provided by the various EU and EC strategies is too broad in scope and ambition for mainstream education to ‘deliver’ and therein lies a fundamental mismatch between the objectives of media literacy as articulated in policy and the capacity of education as the agent for its development in society
  • To coherently match Media Studies in the UK to the policy objectives for media literacy expressed in European policy, Government funding (for teacher training), support and endorsement for Media Studies is essential
  • Funding should be prioritised for broader research into the capacity for Media Studies in schools and colleges to develop media and information literacy as defined by the European Union.

The conference is hosted by the French National Research Agency project TRANSLIT (convergence between computer, media and information literacies), in association with the European network COST “Transforming Audiences/Transforming Societies.” It takes place on 13-14 December at the Grand Amphi of Sorbonne Nouvelle University, Paris.

Dr McDougall was lead author on the report, entitled Media and Information Education in the UK, alongside his LSE collaborators Professor Sonia Livingstone (Leader of the TRANSLIT/COST Media Literacy Task Force) and Dr Julian Sefton-Green.

A Fusion funded ‘Royal’ visit

Santander Mobility Network Fusion Funds allowed me to visit King Juan Carlos University (Universidad Rey Juan Carlos, URJC) in Madrid, Spain, a few weeks ago. After being hit by the parvovirus 24hr after arriving in Madrid I finally managed to pull myself together and visit Dr Marcos Mendez at the Department of Biodiversity and Conservation, who had arranged for me to meet the Head of the Department, the Head of the Postgraduate School, some academics and undergraduate students. I introduced them to (and left them with several hard copies of) BU’s Summer Schools and our Master’s courses; we also discussed placement opportunities for BU and URJC students. One of them (from URJC) will be visiting us in the New Year funded by Erasmus placement funds. Academics at URJC Department of Biodiversity and Conservation are extremely keen in receiving BU students to work on the wealth of terrestrial and aquatic conservation projects that are running in the Department.

Overall, it was a very productive visit and we now are exploring funding opportunities to develop further this collaboration. If you know of any student looking for a placement, URJC can offer a great opportunity… in the wonderful town of Madrid. Drop me an email (Genoveva Esteban, School of Applied Sciences – gesteban@bournemouth.ac.uk) and I will get it organised.

Elevator Pitch – SFC Solutions for Chefs

So what started as a match funded PhD with Solutions for Chefs (SFC), an Austrian software company, has now developed into an exciting portfolio of activity.  Working with DEC we are going to apply for funding through The Global Innovation Initiative (GII) which is a shared commitment of the United Kingdom and the United States to strengthen research collaboration between universities in the UK, and the US. GII will award grants to university consortia focusing on interdisciplinary science, technology, engineering, and mathematics (STEM)-related issues of global significance that foster cutting-edge multinational research and strengthen international partnerships. We are proposing an innovative ICT solution to menu design that can be used as a catalyst for improving human health and wellbeing. This will then lead to an EU RISE bid in January 2015.

Bearing in mind Fusion, SFC have also agreed to sponsor a fourth year consultancy project and the visit this week by one of the partners was both inspirational and supportive of BU.

Ideas in Conflict

The question of why our species engages in war is one that goes to the heart of human nature, often generating starkly polarised views as to whether the peculiarly human propensity to engage in organized conflict between groups is something ‘hard wired’ in our species or is simply a product of particular social systems that promote such behaviour. In considering this question an aspect often debated is the extent to which war should be seen as a fairly recent development, absent before civilization, or whether it has been around much longer going deep into the human past. In relation to this latter the answers people generate may depend largely on the kind of data they focus on. Past conflict can generally be detected via four strands of evidence: written sources, artefacts (weapons, armour etc.), defensive structures and human remains. Of these four, the first three come with a range of problems; weapons and defences may simply be statements of prestige or status and reveal little about how much actual conflict there was in the past, meanwhile written sources are characteristically biased and incomplete and together represent only 1-2% of the time modern humans have existed.
Instead our new book The Routledge Handbook of the Bioarchaeology of Human Conflict (edited by Chris Knüsel, Exeter and Martin Smith, BU) focuses specifically on human remains in order to ask the question: ‘if human burials were our only window onto the past, what story would they tell?’ Skeletal injuries constitute the most direct and unambiguous evidence for violence in the past, and in fact offer clear and unequivocal evidence of physical hostilities reaching as far back as we have burials to examine.
Warfare is often dismissed as ‘senseless’ and as having no place in society. Consequently, its place in social relations and societal change remains obscure. The studies in this volume combine to present an overview of the nature and development of human conflict from prehistory to recent times as evidenced by the remains of past people themselves in order to explore the social contexts in which such injuries were inflicted. A broadly chronological approach is taken ranging from the Krapina Neanderthals, to Neolithic Asia, Precolumbian Peru, First World War France, and 1990’s Rwanda. However this book is not simply a catalogue of injuries illustrating changes in technology or a narrative detailing ‘progress’ in warfare but rather provides a framework in which to explore both continuity and change based on a range of important themes that hold continuing relevance throughout human development.
Taken together these studies demonstrate not only the antiquity of war but also the extent to which processes and mechanisms acting to promote or limit intergroup conflict in the context of prehistoric villages hold equal relevance for the global village today. We conclude that war may not be an evolutionary adaptation in itself but rather a by-product of other ‘hard-wired’ mechanisms that may be exploited as part of a social strategy by which individuals and groups attempt to advance their own interests. This is a heartening point as this means that rather than an inevitable human universal, war can be seen as something that might eventually be dispensed with altogether. The last word on human conflict is far from being written, but when it is it need not be a pessimistic one.

Sustainable Design Research Centre: nano-coating experimental resource

BU’s Sustainable Design Research Centre has recently added nano-coating experimental resource to its labs

Schaeffler is match funding a PhD studentship (£24K plus £41K in kind) looking into Electroplated composite coatings with incorporated nano particles for tribological systems with a focus on water lubrication. Schaeffler develops and manufactures precision products for machines, equipment, vehicles and aerospace applications. Schaeffler is a leading manufacturer of bearings worldwide and a renowned supplier to the  automotive industry.

This research lies within the Sustainable Design Research Centre’s Tribology theme. This research aims to understand friction, wear, and corrosion performance of electroplated nano-composite coatings especially with special focus in water lubricated mechanical components. These issues are of significant importance in terms of industrial applications. The proposed project will enhance reliability, durability and life cycle issues while incorporating sustainability aspects.

In order to carry this research forward SDRC has recently added a nano-coating facility to its leading research labs in Tribology, Corrosion, Nano-Coatings, Renewable Technology (Thermodynamics & Heat Transfer) and Sustainable Design.

General specifications of the new addition are provided here.

Control Interface

  • The MicroStar control interface features a fully-programmable microprocessor. Menus are accessible to set ampere time, real-time cycles, output tolerance settings and more. Standard features include:
    • Real Time Cycle Control
    • Ampere Time Cycle Control
    • Ampere Time Totalizer
    • Error signals for over-temperature, locked fan rotor, output out-of-tolerance and power failure/brownout conditions
    • Calibration capability through the control interface
  • Digital input for inhibit/operator control
  • FrontPanel+ Host Control Program for process set-up generation and process storage/data logging
  • RS485 and USB prots for serial control

Straight DC and Choice of Low Frequency Pulse or High Frequency Pulse Output

  • High Frequency Pulse (0-5000 Hz)
    • 0 – 40 volts average (DC) or peak (pulsed) voltage
    • 0 – 250 amps average current (or maximum DC current)
    • 10 – 400 amps peak (pulsed) current
  • Low Frequency Pulse (0-200 Hz)
    • DC to 200 Hz pulses (at an 80% duty cycle)
    • Minimum Pulse Width:  4 milliseconds ON, 1 millisecond OFF (80% duty cycle)
    • Typical Pulse Rise Time:   Less than 1500 milliseconds
    • Typical Pulse Fall Time:     Less than 1000 millisecond

If you have interests in this resource, research area or would like to know more about the research activities within SDRC please do contact.

Dr Zulfiqar Khan (Associate Professor)

Director SDRC

email: zkhan@bournemouth.ac.uk

Social/Medical Model and the concept of ‘Normal’ Birth

The December issue of The Practising Midwife included the slightly more theoretical article ‘Normal birth: social-medical model’.[1] The paper is written by Ms. Jillian Ireland, midwife and Royal College of Midwives (RCM) Union Learning Rep. at Poole Hospital NHS Foundation Trust and Visiting Faculty at Bournemouth University in collaboration with BU Professor Edwin van Teijlingen.

The paper argues that someone’s perspective of birth is not simply semantic. Thus, whether a midwife describes her role as being ‘with woman’ through labour or as someone who ‘delivers’ women of babies does not just demonstrates a more or less currently politically correct description. No, it suggests having different perspectives or world views of pregnancy and childbirth. Sociologists recognise two different approaches as two different models, a social model and a medical model of childbirth. The social model stresses that childbirth is a physiological event that takes place in most women’s lives. The medical model highlights that childbirth is potentially pathological. In the latter view every pregnant woman is potentially at risk, hence she should deliver her baby in an obstetric hospital with its high-technology screening equipment supervised by expert obstetricians. In other words, pregnancy and childbirth are only safe in retrospect.

The Practising Midwife’s paper argues that having some understanding of the underlying sociological models of pregnancy and childbirth can help politicians, journalists, policy-makers, midwives, doctors, and new mothers (and their partners) to put issues around ‘normal birth’ into perspective. This paper builds on previous work by the second author on the medicalisation of childbirth and the social/medical model published in Sociological Research Online[2] and Midwifery.[3]

Prof. Edwin van Teijlingen
Centre for Midwifery, Maternal & Perinatal Health


References:

1. Ireland, J., van Teijlingen, E. (2013) Normal birth: social-medical model, The Practising Midwife 16(11): 17-20.
2. van Teijlingen, E. (2005) A critical analysis of the medical model as used in the study of pregnancy and childbirth, Sociological Research Online, 10 (2) Web address: http://www.socresonline.org.uk/10/2/teijlingen.html
3. MacKenzie Bryers, H., van Teijlingen, E. (2010) Risk, Theory, Social & Medical Models: a critical analysis of the concept of risk in maternity care, Midwifery 26(5): 488-496.