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4.9 Bluetooth

The driving force for the development of the Bluetooth standard was to eliminate the need for connecting wires between local ICT devices such as keyboards, monitors, printers, PDAs (Personal Digital Assistants), cell phones and headsets. This was already possible using infrared technology, but the requirement for line-of-sight positioning between the communicating interfaces limits infrared's usefulness. Because Bluetooth uses radio waves, Bluetooth devices can communicate with each other wit
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4.7 WiFi data rates and operating range

Just as for Ethernet, developments in technology have increased the achievable data rates since the first WiFi standard was developed in 1997. At the time of writing, the latest WiFi standard to be published – IEEE 802.11g – defines a data rate of 54 Mbps.

Activity 17: exploratory

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4.5 WiFi network structure

A WiFi network can operate in one of two different modes: ad hoc mode or infrastructure mode

In an ad hoc network, stations communicate with each other directly, without the need for any intermediary or central control. This means that when one WiFi device comes within range of another, a direct communication channel can be set up between them. This is known as peer-to-peer communication. Additional devices can join the network, all communicating with each o
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4.4 An introduction to WiFi

WiFi (from ‘Wireless Fidelity’) is used to connect devices together in one of two network configurations known as ‘ad hoc’ and ‘infrastructure’. We shall explain these terms shortly. (As a starting point, though, you could look up the terms ‘ad hoc’ and ‘infrastructure’ in your dictionary.)

In wireless LANs, nodes are usually referred to as stations – probably because each communicating device acts as a radio station with transmitter and receiver. These func
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5.2 An example

In order to complete this section I shall present a simple example. This is loosely based on one described in [1], currently one of the very few books written on JavaSpaces technology.

An object that can be stored in a space has to implement an interface . The objects that form part of the example will just
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2.2 Fixed and adaptive protocols

The protocol described above for a simple naming service is an example of a fixed protocol. This is a protocol whose vocabulary is fixed: it is embedded in the client and server's code and data and does not change. An adaptive protocol is one where the protocol changes. A fixed protocol could change over a period of time because the functionality provided by a server changes. However, this change will be over months or years rather than over seconds.

There are some instances wher
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5.5 Problems with transactions

A distributed transaction is a sequence of operations applied to a number of distributed databases which form a single functional step. For example, a transaction which moves an amount of money from a customer's account to an account owned by the same customer is an example of a transaction. It consists of two operations: the operation of debiting one account and the operation of crediting another account. There are a number of problems associated with distributed transactions. This section w
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What is language?: an applied linguistic perspective
This unit serves as an introduction to the discipline of applied linguistics. It examines what is meant by ‘language’, what its main characteristics are, and how human language differs from communication between other animals. It also asks whether theoretical knowledge about language can be applied to professional practice.Author(s): Creator not set

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4.3.1 Start writing

Using the format of introduction, main body and conclusion outlined in Section 3, write up your answer to the question.


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4.2.4 Plan your time

When planning to use the time available, you should:

  • make sure that you are answering the right number of questions

  • divide your time according to the weighting of the questions

  • write down the finishing time for each question

  • try to allow for 10 minutes checking time at the end.

Stick to your plan. Evidence indicates that two half-answered questions obtain more marks than one completed
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3.6.3 Making audio tapes

Why not try recording material from your summary sheets, or cards, onto audio tape? Students who have a strong auditory memory find information sticks if they hear it rather than read it. You could play the tape back to yourself when travelling by train or car.


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1 Revision and exams

Most likely, you are reading this unit 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 unit will help.

This unit is a practical one, and we w
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3.1 Introduction

This section is the second step in using learning to help you achieve your own personal goals for change and development. This second step is really about developing additional ways to build on the evidence you gathered about yourself in Section 2. In particular it considers how other people can help you change. There are two main aspects to this. The first is about involving other people so that you can get feedback from them and increase the depth of your own self-understanding. The second
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References

Adair, J. and Allen, M. (1999) Time Management and Personal Development, London, Hawksmere.
Allen, D. (2001) Getting Things Done: The Art of Stress-Free Productivity, London, Penguin Books.
Bennett, A. (1910) How to live on 24 Hours a Day [online], http://www.web-books.com/Classics/AuthorsAD/Bennett/How/Home.htm (Accessed 18 October 2006).
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2.5 Mind mapping

The focus of this section has been on encouraging you to gather evidence about what qualities, knowledge and skills you have already. This is an important first step, especially if it helps you to realise that you have more than perhaps you realised. It is also an important step as it starts to make the case that it is important to value your qualities, knowledge and skills. If you value them, it is far more likely that other people will value them too.

However, it is also important to
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2.1 Introduction

This unit is about using learning to bring about personal change. This assumes that learning can help achieve such change. Section 2 aims to be the first step in showing you how this is possible. This section has three separate but related aspects:

  1. Section 2 looks at what the word ‘learning’ includes. This turns out to be a very wide ranging idea that suggests that human beings learn all the time. What we learn has impo
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1.6 Conclusion

At the start of this section, there was a list of what we hoped you would get from your study of this section. To save you looking back, the aims of the section were to:

  • provide you with a clear idea of what the unit is about and how it is structured
  • help you understand the importance of the word ‘skills’
  • start you thinking about your own learning.

It would be useful to think back over this list before moving on to section
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1.4 Study skills, other skills

You will find many references to ‘skills’ in this unit. Before we explain how we will be using this word, we would like you to think about what you understand is meant by ‘skills’.

Activity 2 What’s in a word – skills?

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1.1 Welcome

Learning to change is a unit for people who are interested in learning about making changes in their lives. We think that you will find the unit interesting and that it will give you ideas that are useful for bringing about personal change.

The aims of this section are to:

  1. provide you with a clear idea of what the unit is about and how it is structured
  2. help you understand the importance of the word ‘skills’
  3. start yo
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5.1 The values represented by the text

As we have seen, you are fully immersed in the text while you try to discover how it works and what it is about. But in order to make some judgements of it you have to shift your stance a bit. You have to ‘stand back’, as it were, and ask yourself: What do I think about these things I have discovered?

Basically, you need to ask two kinds of question about the text's ‘value’:

  1. What values are represented in the
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