2,052 search results
Unsolved problems in cosmology
Science, Maths & Technology

Unsolved problems in cosmology

...researchers are investigating inflation...Unsolved problems in cosmology: 1 Cosmology today - Modern cosmology is based on the understanding that the Universe began in an event called the hot big bang, in which time and space were created, about 13.8 billion years ago. The Universe has cooled and space has expanded as time has progressed since then. The evidence for this...
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Level 2: Intermediate 6 hrs
Extending and developing your thinking skills
Education & Development

Extending and developing your thinking skills

...researchers this is not the same as human language which is essentially infinite in its meaning (largely due to its grammar), and which is able to associate specific (and abstract) meanings with arbitrary sound and symbols. Indeed, language is the thing that makes us uniquely human (or so the argument goes), and no other species comes close to emulating our ability to...
View course Extending and developing your thinking skills
Level 1: Introductory 6 hrs
An introduction to electronics
Science, Maths & Technology

An introduction to electronics

...research for nearly a century. Miniaturisation, low power consumption and computational load are also drivers of innovation, as can be seen with increasingly powerful and smaller mobile phones that last longer and longer between charges...An introduction to electronics: 4.2 Recording sounds - Interactive 1 will allow you to see what ‘real’ sounds that you make...
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Level 2: Intermediate 10 hrs
The science of nuclear energy
Science, Maths & Technology

The science of nuclear energy

...researcher Ikuo Kashiwakura of Hirosaki University, Japan, and colleagues responded immediately to the disaster, travelling south to Fukushima prefecture to measure radiation levels in more than 5000 people there between 15 March and 20 June. They found just 10 people with unusually high levels of radiation, but those levels were still below the threshold at which acute...
View course The science of nuclear energy
Level 1: Introductory 12 hrs
Exploring languages and cultures
Languages

Exploring languages and cultures

...research topics because I’ve been spending years and years reading and writing in English and so if I have to explain these things in French now I don’t have the, I mean, I don’t have the proper flow, the proper rhythm and the academic language as it should be used by an academic. So this is one other aspect. It’s not directly an effect of what we’ve been doing...
View course Exploring languages and cultures
Level 1: Introductory 14 hrs
Eutrophication
Nature & Environment

Eutrophication

...Research has suggested that changes to certain macrophyte communities can occur at soluble reactive phosphorus concentrations as low as 20 μg 1(1(0.02 mg l(1). Soluble reactive phosphorus (SRP) is the term commonly used to describe phosphorus that is readily available for uptake by organisms. It is used in contrast to measures of total phosphorus, which include forms of...
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Level 2: Intermediate 12 hrs
The search for water on Mars
Science, Maths & Technology

The search for water on Mars

...researchers hope will be a fuller reconstruction of the history of water on Mars. While Curiosity continues to traverse the martian surface, new rover missions to Mars are already underway. NASA’s Perseverance rover landed in Jezero crater February 2021. This landing site was selected by the mission team because HiRISE images indicated it may once have had a deltaic...
View course The search for water on Mars
Level 1: Introductory 5 hrs
Digital communications
Digital & Computing

Digital communications

...research effort put into investigating different switch technologies, and the two presented here represent two extremes: fast, small arrays in the case of lithium niobate electro-optic switches and slow, large arrays in the case of MEMS switches. Lithium niobate electro-optic switches have been available for many years but have not yet been used commercially to any great...
View course Digital communications
Level 3: Advanced 20 hrs