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Grinding
Science, Maths & Technology

Grinding

...2 to 200, although high grinding ratios frequently give rise to poor surface integrity. For form grinding wheels are dressed to shape using diamond dressing tools or by “crush dressing”. Materials: Ferrous, non-ferrous, polymers and ceramics are ground, as long as workpiece is softer than the abrasive grit. High ductility metals have a tendency to clog the grinding...
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Article 10 mins
A brief introduction to the Chinese education system
Education & Development

A brief introduction to the Chinese education system

...2) colleges that offer three-year diploma or certificate courses on both academic and vocational subjects. Postgraduate and doctoral programmes are only offered at universities. Adult education Adult education ranges from primary education to higher education. For example, adult primary education includes Workers’ Primary Schools, Peasants’ Primary Schools in an...
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Article 10 mins
What do safe drinking guidelines mean?
Health, Sports & Psychology

What do safe drinking guidelines mean?

...2 units a day, and the curves are slightly different if the 14 units are not evenly spread over the week This, I feel, really does provide important information: At one unit a day (half a standard glass of wine), they estimate a tiny overall benefit for men and a slightly larger, but still small, overall benefit for women. But the Department of Health appears very eager...
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Article 5 mins
Five surprising facts about sex and the pandemic
Society, Politics & Law

Five surprising facts about sex and the pandemic

...2 2. Changes in relationship patterns Other research completed by Relate in partnership with eHarmony reported ‘turbo relationships’ with people making a commitment to each other and moving in together more quickly than before, but this didn’t mean that everything was plain sailing. In their study, 12% of those in relationships reported that their sex life had...
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Article 2 mins
Introduction to Ukrainian language and culture
Languages

Introduction to Ukrainian language and culture

...2: Ukraine flags in London [Described image] Figure 3: The village shop in Litton, Derbyshire, flies the Ukrainian flag and the village has organised many fundraising events to support Ukraine. As you can see from the photos, there is a lot of good will and solidarity with Ukraine in cities and villages around the UK, as in other countries around the world. These days,...
View course Introduction to Ukrainian language and culture
Level 1: Introductory 25 hrs
The formation of exoplanets
Science, Maths & Technology

The formation of exoplanets

...2 describes the core-accretion scenario for planet formation. This was initially developed to explain the existence of Jupiter, but has, over the years, become a more general model of planet formation for its ability to account for a large diversity of planetary outcomes, from Earth-sized planetary cores that form first, to ice and gas giants that evolve later. Lastly,...
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Level 3: Advanced 6 hrs
Prifysgol y Plant – Cyrsiau ar-lein am ddim
Education & Development

Prifysgol y Plant – Cyrsiau ar-lein am ddim

...2] O fananas i forfilod gleision, mae yna amrywiaeth anferthol o anifeiliaid a phlanhigion o’n cwmpas. Mae nifer ohonyn nhw’n byw yn rhai o’r amodau anoddaf ar y blaned ac maen nhw wedi addasu’n berffaith er mwyn goroesi. Mae rhai yn teithio cannoedd o filltiroedd bob blwyddyn, tra mae eraill yn aros yn yr un lle am gannoedd o flynyddoedd. Gall y cyrsiau hyn roi...
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Article 5 mins
Mosquito resistance to insecticides
Science, Maths & Technology

Mosquito resistance to insecticides

...2 Distance from the Mediterranean coast plotted against frequency of the ester1 allele in mosquito populations in the south of France in the 1970s. Activity 1 In which populations was the ester1 allele most common in each of the years shown? Answer In all three years, the ester1 allele frequency was highest in the populations closest to the coast. Activity 2 Describe how...
View course Mosquito resistance to insecticides
Level 3: Advanced 3 hrs