2,730 search results

Statistics: What is it or what are they?
Science, Maths & Technology

Statistics: What is it or what are they?

...think they have, about what statistics is. But before we get into that, there’s a basic question to answer: is the word ‘statistics’ singular or plural? It looks like a plural because it ends in ‘s’. But ‘mathematics’ and ‘physics’ end in ‘s’, and we don’t talk about one ‘physic’ or one ‘mathematic’. The words ‘mathematics’ and...
Float or sink?: Explore your child’s ideas about the physical world
Education & Development

Float or sink?: Explore your child’s ideas about the physical world

...think will float and one for those that they predict will sink. Don’t say what you think yet. Ask your child to explain why each object will either sink or float. Write down the name of each object and the reason your child gives for their ‘prediction’. Mix up the objects again and ask your child to test each one in turn in the bowl of water. Are there any...
Good Mock COP, Bad Mock COP
Education & Development

Good Mock COP, Bad Mock COP

...Systems at the Open University, live from the real COP26 negotiations.] Pupils were thrilled to hear from Dr Leslie Mabon, Lecturer in Environmental Systems at the Open University, live from the real COP26 negotiations. With the stage set, teams then set out their positions in opening statements to the conference. Teams took part in three rounds of negotiations, these...
Emmy Noether: Bucking the historical trends
Science, Maths & Technology

Emmy Noether: Bucking the historical trends

...system we can always find a conserved quantity. This means that if, after some transformation, the system looks the same, then there must be some measurable quantity that does not change. Conserved quantities are common in physics, the most famous of which is energy, which cannot be created or destroyed. It is Noether's theorem that relates this conservation law to the...
The story of infection
Health, Sports & Psychology

The story of infection

...system is weak. And unfortunately, TB has taken advantage of infection with another pathogen: HIV – the virus that causes AIDS. One consequence of HIV is that it supresses the immune system. If an individual infected with HIV has dormant TB, then often active tuberculosis will follow; this co-infection has been a major reason why TB has taken hold and become much more...
Electroplating
Science, Maths & Technology

Electroplating

...system which enables the jigs to be immersed in each tank for the appropriate length of time, and in the sequence necessary to achieve the required finish. The incorporation of programmable sequential controllers enables the process times to be modified as required for a wide variety of components, and the provision of overhead transporters on tracks provides a flexible...
Article 10 mins
Why cancer cells go to sleep: the mystery of cancer dormancy
Science, Maths & Technology

Why cancer cells go to sleep: the mystery of cancer dormancy

...system, which can eliminate most tumours. Second, they need to survive anti-cancer therapies, and, third, they need to invade distant organs and generate metastases. Cancer dormancy is essential to meet all these challenges. During the periods of dormancy, cancer cells reshape their genetic make-up and get ready for the next stage of progression. Without dormancy, cancer...
Plasma arc spraying
Science, Maths & Technology

Plasma arc spraying

...system is a “lathe” where the torch replaces the tool post. Automatic part handling and computer control of the torch can be used to improve the production rate and quality of the coating. Both processes are usually done in air, although the non-transferred arc process can be done under vacuum or inert gas for powders and/or components which oxidise readily. Processes...