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How lenses and mirrors work
Health, Sports & Psychology

How lenses and mirrors work

...systems. Converging (convex) lenses and converging (concave) mirrors each cause parallel rays of light to come together at the focal point, or focus, of the lens or mirror as shown below. In contrast, diverging (concave) lenses and diverging (convex) mirrors each cause parallel rays of light to spread out as if emanating from the focal point situated at a distance of one...
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Article 5 mins
Marketing food to children and young people: Why it matters even more in the digital age
Education & Development

Marketing food to children and young people: Why it matters even more in the digital age

...systems; and urban planning and deprivation that doesn’t support physical activity or healthy food supply. In addition to all these – and interacting with them – is the promotion (marketing and advertising) of unhealthy foods in the media and elsewhere, which has been shown to increase children’s eating. From their earliest days, children recognise more unhealthy...
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Article 10 mins
The Great Fall: A personal perspective, before and after
Languages

The Great Fall: A personal perspective, before and after

...systemic flaws and distortions had been serious, Walter grimly predicted huge losses in East Germany’s progressive social programmes now the Wall was down. As we walked around what was East Berlin Walter, then in his 83rd year, talked about the need for a radical rethink of socialist strategies, so our children and grandchildren would grow up in a better world. Those of...
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Article 5 mins
How can we address racial inequality and racial disproportionality?
Education & Development

How can we address racial inequality and racial disproportionality?

...System 2020 Update. This includes communities’ concerns about racial disparities in stop and search. In November 2020, London Mayor Sadiq Khan has launched an action plan to address concerns regarding the disproportionality of the use of police powers against Black Londoners. The action plan also outlines training for police officers and an increase in Black officers...
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Article 10 mins
The Internet at 40
Science, Maths & Technology

The Internet at 40

...system. Pioneers: Donald Davies Donald Davies, a British pioneer of the early internet, explain his key contribution to internet technology - chopping data into small packets that could be transmitted across the netwrok and recombined at the other end. Pioneers: Tim Berners-Lee Tim Berners-Lee, the inventor of the world wide web, talks about where the idea came from and...
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Audio 1 hr 33 mins
Hot isostatic pressing (HIP)
Science, Maths & Technology

Hot isostatic pressing (HIP)

...systems will make process economical for a wider range of components. Pressures vary from 50 to 200 MPa, and temperatures up to 2000˚C with control to ±15˚C possible. Temperature depends on material, but should be high enough to cause diffusion-bonding and low enough to avoid any undesirable structural changes. Typical examples are Ti-6Al-4V, 900˚C; Al-7.5Si-0.5Mg,...
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Article 5 mins
People, automobiles and statistics
Science, Maths & Technology

People, automobiles and statistics

...systems must be appropriate to the occupants, this influences things like seatbelt locations and airbag deployment which could themselves cause injury if there is a poor match between design and occupants’ build. It’s clear that people’s physique will be a key influence in selecting a car. So manufacturers need to understand how factors such as: height, leg length,...
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Article 10 mins
OpenLearn Wales take your learning further
Society, Politics & Law

OpenLearn Wales take your learning further

...Thinking of studying with The Open University? You’re not alone. Thousands of learners have experienced the quality of our free, informal provision and have gone on to study at The Open University. We are the largest provider of part-time higher education in Wales. Find out about The Open University in Wales and browse our full range of courses and qualifications. More...
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Article 5 mins