19 Conclusion

In sections 15–18, we examined the components and processes of an ICT system that is used for an everyday activity: shopping. We started by looking at a system map of the ‘checkout system’ before exploring the processes involved at the checkout. We considered some examples of networks and discussed the processes involved in a networked supermarket ICT system. Finally, we looked briefly at another way in which ICT systems can be used for shopping: e-commerce.


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17.3 The network

The network conveys the data on items purchased through to the database server. It also conveys data such as revised prices and special offers from the database server back to the checkout terminal. In both cases this may involve selecting an appropriate route through the network and manipulating, storing or retrieving data.


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1 Bringing the news on the back of a horse

We seem to be surrounded by ‘news’ these days, but it was not always like that. In Shakespeare's Henry IV Part 2, Falstaff hears the news that his former friend and drinking partner, Prince Hal, is now King Henry V, following the death of Henry IV. It is a comic scene set in Gloucestershire, 200 km from the royal court in London, and it is clear that before the messenger (called Pistol) arrived on horseback Falstaff did not even know that Henry IV had died.

It would not be li
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5.2.1 Discrete variables

The charts about different modes of transport and that on attendance figures at a range of cultural events all use what might be called ‘word categories’. Each category (e.g. bus, rail, cycle, and walk) is quite distinct from any other in the set of categories. Such distinct categories are known in mathematics as ‘discrete variables’.

Word categories are not the only type of variable that is discrete; numbers can also be discrete. For example, at the beginning of this section, w
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Acknowledgements

Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence

Grateful acknowledgement is made to the following sources:

Figures

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2.4 Ownership, control and ideas about the body

This section focuses on the extent to which a person becomes invisible when a practitioner rigidly adheres to a specific view of health and disease, and fails to accept that others (specifically the person they are treating) may have different ideas about illness or, indeed, about their body. The imposition of a fixed view of illness and disease can be extremely disempowering for people seeking help.

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1.5.8 Bibliographic software

If you are considering taking your studies further you might like to consider using bibliographic software. Bibliographic software can be used to sort references, annotate them, manage quotations or create reading lists.

There are several software packages on the market. Some are listed below.

Brain functions
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Monetary policy and the financial crisis 2006-2009 [Audio]
Speaker(s): Cheryl Schonhardt-Bailey | Cheryl Schonhardt-Bailey is Reader in Political Science in the Government Department of the London School of Economics and Political Science, where she teaches courses in the politics of economic policy and legislative politics.
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Ultraviolet irradiation

The nucleic acid bases absorb electromagnetic radiation in the ultraviolet (UV) region of the spectrum. The major photoproducts in DNA, generated upon exposure to UVB light, are structures called pyrimidine dimers which are formed from two adjacent pyrimidine bases, as shown in Table 3d. The formation of such dimers introduc
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Learning outcomes

By the end of this unit you should be able to:

  • explain the implications of a seed/nut-eating habit;

  • suggest why rodents are a successful order of mammals;

  • describe adaptation, based on knowledge of the theory of biological evolution by natural selection;

  • explain how altruistic characteristics can be understood in terms of kin selection and inclusive fitness;

  • give examples of the fitness costs and benefits associated wit
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Introduction

This unit will help you to identify and use information in Science and Nature, whether for your work, study or personal purposes. Experiment with some of the key resources in this subject area, and learn about the skills which will enable you to plan searches for information, so you can find what you are looking for more easily. Discover the meaning of information quality, and learn how to evaluate the information you come across. You will also be introduced to the many different ways of orga
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7.4.1 Uses of models not made explicit

  • recognise that many scientific findings follow from the use of theoretical models in addition to consideration of empirical data;

  • be aware that numerical values provided by scientists may be derived directly from data, or from the application of theoretical models to a data set.


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Cheery: The true adventures of a Chiricahua Frog

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Creating a Spry data set
Build a Spry data set in a few easy steps. You can build both HTML and XML data sets.
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AP Chemistry: Bonding Resonance and Formal Charge

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