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How fertility rates affect population
Science, Maths & Technology

How fertility rates affect population

...work out why? The fertility rate based model regulates the rate at which new people are introduced into the population starting in 2012; the life expectancy model regulates how people started to leave the population profile. Maybe not surprisingly, the difference in effect on the overall predicted population size by 2087 is not as significant as it was for the different...
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Article 10 mins
Beachbrains
Science, Maths & Technology

Beachbrains

...work of parasols and towels soaked up almost every square centimetre of sun. It was a feat that a tree canopy would have been proud of. Let us say that Otranto beach is about 1 kilometre long and 50 metres wide. A lazy sunbather, lying on a towel under a flowery parasol, covers no more than a couple of square metres of sand. Those that gambol in the surf or impress with...
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Article 10 mins
Telegram brief history. Stop
Digital & Computing

Telegram brief history. Stop

...working on ways to transmit information using electricity. In the early-19th century, various inventors managed to send messages via insulated electrical wires. However, the American Samuel Morse is commonly regarded as ushering in the era of the telegram by sending his famous message 'WHAT HATH GOD WROUGHT' down electrical wires from Washington to Baltimore in 1844....
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Article 5 mins
David Lucey
Education & Development

David Lucey

...work in the field of psychology or wellness, and maybe a side job in data entry, and I hope to go to college and do evening classes in a few years time. ‘I also want to explore the tourism and media studies content on OpenLearn, as I think that would be really helpful, but I will definitely do more courses, if they interest me. It’s good to be open-minded about new...
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Article 5 mins
How do you tell the biological sex of a T-Rex?
Science, Maths & Technology

How do you tell the biological sex of a T-Rex?

...and more about dinosaurs and their kin in ever more exquisite detail. So, how do you identify the sex of a T. rex? Super awesome advanced science, and a lot of hard work, that’s how! *Apparently it can be induced in males through extreme dosing of oestrogen, but that’s another story… This article was originally published by the PLOS network under a CC-BY licence...
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Article 5 mins
Can high blood pressure protect the over-80s from dementia?
Health, Sports & Psychology

Can high blood pressure protect the over-80s from dementia?

...work to pump blood around the body. As blood pressure increases, so too does the effort of the heart. Over time, the added strain caused by high blood pressure can damage the heart and increase the risk of having a heart attack. High blood pressure can also indicate that the blood vessels are themselves damaged or blocked. This is particularly bad for the brain, because...
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Article 5 mins
Why getting active with children is good for parents too
Health, Sports & Psychology

Why getting active with children is good for parents too

...work needed to increase the involvement of dads and parents from other ethnic groups. The findings also showed that families wanted to carry on taking part in physical activity sessions when they had completed the programme but often the only next steps they could find were linked to sports, which was not what they wanted. The project is ongoing so hopefully more and more...
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Article 5 mins
Photochemical Machining (Photo-fabrication; Chemical milling)
Science, Maths & Technology

Photochemical Machining (Photo-fabrication; Chemical milling)

...working size. The final reduction produces a negative which is the exact size of the finished part. [Manu 1] Metal sheet cleaned with pumice and a flexible shaft brush, or chemically. [Manu 2] Plate etching removes all metal not protected by coating applied during developing process. [Manu 3] Manufacture: An alternative to laser cutting, fine blanking and NC machining....
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Article 5 mins