2,105 search results
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...
View course Eutrophication
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
Moons of our Solar System Badge icon
Science, Maths & Technology

Moons of our Solar System

...researcher at The Open University with a specialist interest in water inside the Earth’s Moon, and in June 2016 moved on to a position at the Johnson Space Center in Houston. Jess pops up at the start of each week to tip you off about highlights and challenges, to remind you what you’ve learned and to help you make the most of these eight weeks of scientific...
View course Moons of our Solar System
Level 1: Introductory 24 hrs
Understanding and managing risk
Money & Business

Understanding and managing risk

...research technique of decision-tree analysis, which can be useful for showing the links between choices and the risk implications of making those choices. Even if you do not go through the whole process of estimation and ‘roll back’, just drawing the tree will often clarify cause and effect. Box 7 The concept of a decision tree The principle in this
View course Understanding and managing risk
Level 3: Advanced 20 hrs
Public health approaches to infectious disease
Science, Maths & Technology

Public health approaches to infectious disease

...researched. This section examines a hierarchy of public health interventions, which are traditionally considered to operate at three different ‘levels of prevention’. Although you should be aware that there is some artificiality in separating them in this way, they provide a useful framework to illustrate the diversity of public health strategies for preventing...
View course Public health approaches to infectious disease
Level 1: Introductory 3 hrs
Successful IT systems
Digital & Computing

Successful IT systems

...research (OR) and management science projects. They asked the analysts working on the projects and the managers responsible for implementation to classify their own projects according to the degree of success. As you can see, the analysts regarded 63% of the projects to be successful and implemented whereas only 20% of them were classified thus by the managers. Table 3...
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Level 3: Advanced 9 hrs
Learning how to learn
Education & Development

Learning how to learn

...research about learning which has shown that this approach can actually improve your performance. Certainly it can and will make you a more efficient and effective learner. Before we start to explore the process, let us consider two general points about learning. There is no single method of learning that guarantees success. How you learn best depends on many different...
View course Learning how to learn
Level 1: Introductory 6 hrs