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Acknowledgements

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Author: Ramy Majouji

All other materials included in this unit are derived from content originated at the Open University.


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1.6 Keeping up-to-date

How familiar are you with the following different ways of keeping up to date with information; alerts, mailing lists, newsgroups, blogs, RSS, professional bodies and societies?

  • 5 – Very familiar

  • 4 – Familiar

  • 3 – Fairly familiar

  • 2 – Not very familiar

  • 1 – Not familiar at all


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7.2.1 Labelling behaviour

Signalling that you are about to suggest a solution to a problem or to ask an important question is one way of drawing attention to this and puts pressure on the person or persons at whom your signal is directed to respond.


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2 What's so great about innovation?

So far we have suggested that innovation is a positive concept and, it appears, the rate of innovation continues to accelerate, led mostly by technology. The process is an example of positive feedback, in which the change is self-reinforcing: the development of technology itself increases the capacity for technological innovation, and raises the expectation of consumers for further innovation. While there seems little reason why this process of accelerating technological change should
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8.7 Fuel poverty in Scotland

Fuel poverty is a critical issue facing people on very low incomes, particularly in countries like Scotland, with its severe winters. Winter deaths are disproportionately high when compared with other parts of Britain. This unit aims to give you an understanding of what poverty is like, and how adequate heating can become a matter of life and death.

To access this material click on the unit link below. It leads to a separate OpenLearn unit and will open in a new window.

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5 Further resources

For an overview of demographic change, Michael Anderson's chapter in the Cambridge Social History of Britain (1983) provides a nuanced overview of what historical demography can offer. John Gillis' A World of Their Own Making (1996) is a fascinating account of the changes in family rituals and meanings in Western societies since the medieval period. Lesley Hall's Sex, Gender and Social Change in Britain since 1880 (2000) provides a good introduction to histories of sexual
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4 Conclusion

In Section 3 we have looked at marriage, parenthood, sexuality, birth control and population policy in the period of fertility decline in Britain between 1860 and 1930. We can trace the two-way processes by which on the one hand, people drew on formations of social policy when shaping the place that fertility played in their li
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6 Questions for review and discussion

Question 1

Complete the following sentences by selecting the correct word or phrase from the list below to fill in the spaces:

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Headache

Content Type: 
Resource
Short Title/Course Code: 
headache

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2.1 Introduction

Study note: You may like to click on the link below to the Numeracy Resource as you study Section 2. It offers additional explanations and extra practice on some of the topics, and you may find this useful.

Click on the 'View document' link below to open the Numeracy Resource.
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1 Representing data in computers: introduction

A computer is designed to do the following things:

  • receive data from the outside world;

  • store that data;

  • manipulate that data, probably creating and storing more data while doing so;

  • present data back to the outside world.

In the next few sections I am going to examine in more detail the data that a computer receives, stores, manipulates and presents. I
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16.1 Introduction

Supermarkets make use of ICT systems for a range of purposes. In the following sections, we'll look at the processes of receiving, storing, retrieving, manipulating and sending data at the checkout, and then we'll move on to the larger context of the supermarket.


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4.2.3 Second computer (the FirstClass server)

The computer on the right of Figure 11 receives the data, manipulates it and then stores it. The computer then typically sends some kind of response back via the network, which may require the computer to retrieve some stored data.

The computer in this example is one of the Ope
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4.2.2 Network

In the same way as in the network shown in Figure 8, this network conveys the data to the receiver, selecting the most appropriate route for it to travel. In order to do this, the network may need to manipulate and store or retrieve data.

Your computer sends the FirstClass message
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12.2 Bytes of data

You will recall from Section 6.2 that a binary digit, or bit, can have one of two values: either a 0 or a 1. In a computer, bits are assembled into groups of eight, and a group of eight bits is known as a byte. The abbreviation used for a byte is B, so 512 bytes would be written as 512 B. Although this course will use ‘b’ for bit and ‘B’ for byte, you should be aware that not everyone makes this clear distinction.

A byte of data can represent many different things in a co
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8 Computers

In sections 8–14, I am going to start by considering a stand-alone computer, which is a computer that is not connected to a network. In this type of ICT system, the key processes are the manipulation and storage of data. I'll be introducing some details about the way that a computer manipulates and stores data. Then I'll be discussing the processes that are carried out by computers when they are linked.


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7 Describing an ICT system: conclusion

We have arrived at a model of a communication system that illustrates the processes needed for communication. We have also looked at the different kinds of communication link that can be used to convey data, and how to express the rates at which they can convey data. In sections 8–14, we shall be looking at a computer system as an example of an ICT system where data manipulation and storage are the most important features.


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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
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4.1.3 The receiver

The receiver receives data from the network and manipulates it into a message to send to User 2. Sometimes the receiver may also store or retrieve data.

In the mobile phone communication system, the data received from the network must be manipulated back into sound before being sent to the user. In addition, some mobile phones can store and retrieve data about the user's contacts, so that when a call is received they can translate the phone number of the caller into a name which is then
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2.2.2 Drawing the boundary

Deciding where to place the system boundary is an important consideration in that we have to think about what to include and exclude. This isn't always an easy decision to make and it often depends on the perspective of the person viewing the system.

The system maps in Figures 1
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