2.5: Crossing the boundary

So computers are used to acquire, store and present, exchange, and manipulate interesting characteristics of the world. But this raises a serious problem: the world we inhabit and know so well and the world inside the computer are very different in kind. We live in an analogue world. The world of the computer is digital. The exact meaning of these terms may not be very clear to you at the moment. I will define them both in the next section. For the moment, the only point
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Keep on learning

Study another free course

There are more than 800 courses on OpenLearn for you to
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8.4 The OR operation

The OR operation (occasionally called the inclusive-OR operation to distinguish it more clearly from the exclusive-OR operation which I shall be introducing shortly) combines binary words bit by bit according to the rules:

  • 0 OR 0 = 0

  • 0 OR 1 = 1

  • 1 OR 0 = 1

  • 1 OR 1 = 1

In other words, the result is 1 when either bit is 1 or when both bits are 1; alternativel
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6.2 Working with bits

You may have met the term bit, perhaps in connection with computers. The term 'bit' is also important in communication systems. It is an abbreviation for 'binary digit'. A binary digit can have just one of two values: it can be either 1 or 0. Pulses can be represented by 1s and 0s, that is, as bits, and so it is convenient to think of streams of 1s and 0s being conveyed along the communications link.

The rate at which the 1s and 0s are conveyed is known as the data rate or
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6.1 Networks

Next I'll be looking more closely at the 'network' block in Figure 8, and in particular at the links that must be present before communication can take place. I'll introduce you to just a few of the forms that these links can take; links may be physical ones, such as cables, or they may be wireless, such as radio links. I'll also d
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2 Conclusion

The versatile tiny transistor is now at the heart of the electronics industry. In the video clips you have seen the history of the incredible shrinking chip, its Scottish connections, and an explanation of the physics that make chips work as well as a reconstruction of making a transistor using the crude techniques of yesteryear.


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Conclusion

This free course provided an introduction to studying Computing & IT. It took you through a series of exercises designed to develop your approach to study and learning at a distance, and helped to improve your confidence as an independent learner.


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6.2.11 Dynamic pricing

The dynamic pricing model is one which has a number of different instantiations. Basically, such models treat the price of a product or service (primarily a product) as variable and open to negotiation.

The name-your-price instantiation of this model is where the customer of a site offers the price that he or she thinks is reasonable for a product or service. The administrator of the website will pass on this bid to the provider of the product or service who will decide whether t
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6.2.10 Portals

A portal is a website which collects catalogues and characterises a huge amount of information. By displaying a large number of hyperlinks such sites provide an entrance (or portal) to the World Wide Web. Search engines originally provided fairly basic searching facilities; however, the past two years has seen them evolve Portals on the nncmci into portals. Portals are categorised as either horizontal portals or vertical portals. A vertical portal offers an entrance to large am
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The range of work with young people
This free course, The range of work with young people, identifies some features that we might use to describe the various settings where work with young people takes place. This encourages us to identify similarities and differences between settings. It then introduces some theoretical perspectives to help us review these settings and thus understand more about the experience for young people and workers. Finally, it uses these perspectives to analyse examples of different settings, relating the
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Except for third party materials and otherwise stated (see http://www.open.ac.uk/conditions terms and conditions), this content is made available under a http://creativecommons.org/licenses/by-nc-sa/2

The ‘why’ and ‘what’ of educational leadership and management
This free course, The 'why' and 'what' of educational leadership and management, introduces you to researching educational leadership and management and how undertaking research can contribute to both good practice and the building of leadership capacity. First published on Wed, 17 Feb 2016 as Author(s): Creator not set

Introduction

The issue of ‘citizenship, work and the economy’ is often neglected in everyday discussions of citizenship. But a moment's reflection should demonstrate how important it is. The vast majority of us will spend the bulk of our adult lives working in some context or another, and our engagement with economic activity more generally is obvious (and not just as consumers).

Many young people are also intimately tied up with work. School children often have part-time evening, weekend or ho
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Advanced German: Regional landscapes
German regions and landscapes, local traditions and the notion of Heimat are at the centre of this free course, Advanced German: Regional landscapes. You will describe images, make notes from a variety of sources, and write a short piece about the three-nations region around Lake Constance. First published on Tue, 16 Oct 2018 as Author(s): Creator not set

Introduction

This course introduces you to the concepts of:

  • open educational resources (OERs)
  • issues involved in the creation, use and re-use, and pedagogy of OERs
  • a range of tools and media to support you in developing your own teaching and learning practices.

It will provide you with the skills and confidence to engage in further OER work as both creator and user.

Find out more about studying with The Open University by 
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5.2.2 The emergency stop technique

This exercise is an emergency relaxation technique to counteract panic and the build up of tension.

  1. Say sharply to yourself STOP! (aloud if the situation permits).

  2. Breathe in and hold your breath for a moment before slowly exhaling. As you do so, relax your shoulders and hands.

  3. Pause for a moment, then breathe in slowly again and hold. This time, as you breathe out relax your forehead and jaw.

  4. Stay qu
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3.2 Stage 1: Finding out about the exam paper

As a first step, it is a good idea to find out as much as you can about the exam paper for your course. Find out how your exam paper is set out, the way the questions are organised, and what weight each question carries in terms of marks. Different papers adopt different formats. Some require multiple-choice answers. Others ask for essay or short paragraph answers. Some require technical or numerical answers. Reading the instructions on the exam paper is particularly important, as the followi
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3.1 What is revision?

Revision is not, as the word suggests, simply 'looking again' at the material covered in a course - it is a more active task. It involves organising material and finding ways of remembering it, that suit your own particular learning style. Although the time you set aside for revision is important, the approach you adopt and the techniques you use to revise are more vital. Sometimes the thought of having to revise can seem daunting, but be reassured, revision skills and techniques can be learn
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1 Revision and exams

Most likely, you are reading this course because you feel unsure about your ability to do yourself justice in exams. You may never have taken an exam and are wondering how to prepare yourself. It may have been a long time since you took an exam, and you feel a need to refresh your technique. You may be looking for reassurance and advice because you may have had a bad exam experience in the past. Whatever your reason, we hope that this course will help.

This course is a practical one, an
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Learning outcomes

After studying this course, you should be able to:

  • manage time more effectively when revising and in the exam itself

  • learn, or brush up on, revision and exam skills

  • feel equipped to approach exams with less anxiety and stress.


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