1,677 search results
Effects of pollutants on the aquatic environment
Nature & Environment

Effects of pollutants on the aquatic environment

...system. Nitrites combine with haemoglobin in the bloodstream, preventing it from carrying out its normal function of combining with oxygen and carrying it around the body. This can result in a serious, though rare, condition called methaemoglobinaemia (‘blue baby syndrome’), which can be fatal (Skipton and Hay, 1998). Ingestion of nitrate and nitrite by people with a...
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Level 3: Advanced 3 hrs
What is a metal?
Science, Maths & Technology

What is a metal?

...system. At high temperatures (such as under a flame), electrons in the metal atoms will absorb heat energy and be promoted to higher energy levels. [Described image] Figure 7 (a) An electron jump from shell n = 2 to n = 3 is shown by the red arrow. (b) The electron jumps to a higher electron shell further away from the nucleus. Note that energy levels are not evenly...
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Level 1: Introductory 3 hrs
Leadership: external context and culture
Education & Development

Leadership: external context and culture

...system. So in fact, every principle of-- I think there are 360 schools in Singapore. So there are 360 principals, which is another big difference with the UK-- the comparison of size, of course. Every principal in Singapore is a government officer. So they have a very clear duty to fall in line with government policy on education. They're provided with a very big, thick...
View course Leadership: external context and culture
Level 3: Advanced 6 hrs
Understanding service improvement in healthcare
Health, Sports & Psychology

Understanding service improvement in healthcare

...systems may be conceived of as a product, a whole package of skills, know-how, problem solving, needs meeting, priority-determining activity, one that people feel passionate about (hence recurring debates on any changes to the way in which the service is conceived or delivered). National health services in countries like Belgium, France, Germany, Sweden and the United...
View course Understanding service improvement in healthcare
Level 3: Advanced 10 hrs
Strategic planning for online learning
Education & Development

Strategic planning for online learning

...system. Digital Badges – this information is provided by HASTAC (Humanities, Arts, Science and Technology Alliance and Collaboratory), a global community working to transform how we learn, and particularly making use of technology...Introduction and guidance: How to get a badge - To gain the Strategic planning for online learning: A whole school approach digital badge,...
View course Strategic planning for online learning
Level 1: Introductory 10 hrs
Modern slavery
Society, Politics & Law

Modern slavery

...system of human rights protection in relation to modern slavery, but also encourage an appreciation of the influence of International Human Rights Law on the development of the domestic system of human rights protection...This free course, Modern slavery, is designed to develop an understanding of the international system of human rights protection in relation to modern...
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Level 1: Introductory 15 hrs
Human rights and law
Society, Politics & Law

Human rights and law

...system of enforcing or policing such agreements, then what is the purpose in their negotiation? The answer to this question is that there is generally a level of standard to which states adhere in order to achieve acceptance within the world order. Any state falling short of such standards is likely to incur public condemnation either by the United Nations or by other...
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Level 1: Introductory 20 hrs
Astronomy: images of the Universe
Science, Maths & Technology

Astronomy: images of the Universe

...system and details of when the observation was made, is typically stored within the image file as metadata. We need to employ careful methods to make measurements from images such as Figure 1 if we are to make reliable inferences about stars and galaxies. In this section, you will examine how these measurements are made, and what they can tell us...Astronomy: images of...
View course Astronomy: images of the Universe
Level 2: Intermediate 6 hrs