This section starts by broadly classifying different types of network, first by the nature of the communication links used to connect devices and then by a network's geographical spread. It then examines in more detail a network which uses a cabled communication link.

A networked device is often referred to as a node so we shall use this term in the sections that follow. A node is any device (for example, computer, printer, server) connected to a network, either as an end point (
Author(s): The Open University

In this activity you are going to review some of the vocabulary that you have learned about tourist sights, as well as learn some new words.

Classify the vocabulary in the box under the following two ca
Author(s): The Open University

Section 3 is an audio section. We begin by defining the terms group, Abelian group and order of a group. We then demonstrate how to check the group axioms, and we extend the examples of groups that we use to include groups of numbers â€“ the modular arithmetics, the integers and the real numbers.

Click the link below to open Section 3 (11 pages, 703KB).

Author(s): The Open University

## Activity 4: Caring for children

We leave our flat at about 8.15 am and go to nursery where Sabrina (who is four) stays for the mornings. I then take Tristan (who i
Author(s): The Open University

The professional's knowledge and experience adds value to the services provided by lawyers and accountants. These types of service are classed as high-credence services. Credence means trust. A lawyer has â€˜credentialsâ€™ to handle your case â€“ their qualifications are written evidence of trustworthiness and authority.

High-credence services are found in both the commercial and the non-profit sectors. Services are mainly, by their very nature, intangible, so customers have diff
Author(s): The Open University

2015 MIT Excellence Awards + Collier Medal Ceremony
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Tables are a useful way of recording key information. The headings for Tables 1 and 2 have been prepared for you, and you can copy and complete the tables in your notebook. If you need to find any of this information again later, then it is very useful to have it summarised in a table.

I
Author(s): The Open University

There is no doubt though that the play keeps drawing our attention to its protagonist's weaknesses. The comic scenes in Act 1 serve to reinforce the connection between magic and appetite. In Act 1, Scene 4, Wagner tells us that Robin is so poor that â€˜he would give his soul to the devil for a shoulder of mutton, though it were blood rawâ€™ (ll. 9â€“11) and Robin adds: â€˜Not so, good friend. By'r Lady, I had need have it well roasted, and good sauce to it, if I pay so dearâ€™ (ll. 12â€“15).
Author(s): The Open University

Understanding The Fibonacci Spiral
Gareth Manfred Graff at 'Restore The Planet' explains the amazing Fibonacci spiral. (03:59)
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Freezing the Liquid Metal Mercury - SOLID
Mercury is a very interesting element but it can be hard to come by. More than likely your chemistry teacher doesn't have a large sample of mercury for you to see. In this video you can see liquid mercury freeze in some snow, and then see how dense mercury is when a large ball bearing floats in liquid Hg (02:50).
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The Fall: Before and After

00:00:59

Author(s): No creator set

Attachment to places can be a resource within care relationships, especially where people have a shared history of attachment to places. An older couple may have experienced the ups and downs of moving between places together for much of their lives. Or a daughter may be caring for her mother in the home where she was born and brought up. A shared understanding of the home environment and the support which may be available locally can be invaluable in developing a care relationship. Such know
Author(s): The Open University

Speed is the ratio of distance travelled to time taken. A runner's speed may be quoted in metres per second, miles per hour or kilometres per hour. The units are given as:

Â Â Â unit of distance per unit of time.

When you have a distance covered (such as a mile) and a time taken (such as four minutes) the average speed is defined as

• Â
Author(s): The Open University

LR/PS - Moving between Lightroom and Photoshop
Learn how to take a single image or multiple images for editing seamlessly between Lightroom and Photoshop. Also, see how to use Photoshop tools like Photomerge, HDR pro, and the export dialog in Lightroom for exporting multiple files.
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Computadoras y Arquitectura en la Era Digital (Computers and Architecture in the Digital Era)
It seems that when architects think, and talk about computers, they only reflect on very narrow images of the phenomenon. Architects think that the impact of computers in their profession is only related to how PCs, CAD/CAM, networks, software, peripherals, can improve the way they work today. Architects, by enlarge, are unable to reflect beyond the screen of their computers and the wall of their offices when it comes to recognize the real consequences resulting from the new technological advanc
Author(s): Andia, Alfredo

Lesson 03 - One Minute Romanian
In lesson 3 of One Minute Romanian you will learn to say that you can speak a little Romanian. Remember - even a few phrases of a language can help you make friends and enjoy travel more. Find out more about One Minute Romanian at our website - http://www.oneminutelanguages.com. One Minute Romanian is brought to you by the Radio Lingua Network and is Â©Copyright 2008.Author(s): No creator set

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## Study another free course

There are more thanÂ 800 coursesÂ on OpenLearnÂ for you to choose from on a range of subjects.Â

Find out more
Author(s): The Open University

The internal surface of the plasma membrane provides a useful environment for spreading signals received by surface receptors around the cell. Several specialist enzymes are activated by membrane-bound receptors, creating large numbers of small lipid-soluble second messenger molecules, which can diffuse easily through the membrane. These enzymes all use phosphatidylinositol (PI) and its derivatives as their substrates. PI itself is a derivative of glycerol: the OH group on carbon atom
Author(s): The Open University

Image 9 Photographer/Painter: French School. Subject: Portrait of a nobleman seated at a desk
Author(s): The Open University

Ancient Warriors - The Highlanders 1/3
The beginning is purposely blurred as an artistic effect. This is a History Channel documentary regarding the Highlander's fight against the English in the 14th century that is suitable for high school students.
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