5.3.2 Productivity difference

The preceding discussion has only considered what would happen if all women undertake less investment in human capital than men. If men and women invest to the same extent, human capital theory suggests that no wage differences would be observed. What happens, however, if there are differences in skill levels both between genders and within gender groups? To consider this we will also make the additional assumption that firms do not know when recruiting workers who are the most productive. Ho
Author(s): The Open University

The Final Cut
It is often said that a movie comes to life in the edit suite. Ben Harrex of Final Cut post production studios in London discusses five themes with examples; The Cut, The Dissolve, Cropping and Resizing, Titles and The Sound. Ben explains how the video editor has a huge amount of creative control over how the final product looks. This material forms part of The Open University course T215 Communication and information technologies.Author(s): The OpenLearn team

Introduction

Relational database systems underpin the majority of the managed data storage in computer systems. This course presents an overview of the development life cycle for a database system and highlights how the database development differs from traditional software development.

This OpenLearn course provides a sample of Level 3 study in Author(s): The Open University

Network security
Encryption of files and firewalls are just some of the security measures that can be used in security. This free course, Network security, which assumes you have a substantial knowledge of computing, helps to explain the intricacies of the continually changing area of network security by studying the main issues involved in achieving a reasonable degree of resilience against attacks. Author(s): Creator not set

Systems thinking and practice
What is systems thinking and practice? The essence of systems thinking and practice is in 'seeing' the world in a particular way, because how you 'see' things affects the way you approach situations or undertake specific tasks. This free course will help you to learn about the problems of defining a system and meet some of the key concepts used in systems theory: boundary, environment, positive and negative feedback, etc. Author(s): Creator not set

Natural intelligence
One goal of artificial intelligence is to build machines that can operate in the real world, with all its noise and uncertainty. Much of what we want machines to do (see, recognise, navigate, move, coordinate) is already done very well by simple creatures. In this free course, Natural intelligence, we look at how such creatures achieve these goals and start to understand how we can build machines with the same capabilities. Author(s): Creator not set

Introduction

Requires that Windows desktop be used in parallel with reading the book.

Tables and charts are a great way to present numerical information in a clear and concise form. This course explains how to use the Windows calculator to carry out basic operations and calculate percentages. You will then learn how to use charts and tables to represent and interpret information.

This OpenLearn course provides a sample of level 1 study in Author(s): The Open University

An introduction to web applications architecture
This free course, An introduction to web applications architecture, provides an overview of the design and implementation of computer software that runs on web servers, instead of those running solely on desktop computers, laptops or mobile devices. First published on Thu, 03 May 2018 as Author(s): Creator not set

Introduction

There is more to computers and processors than simply PCs. In fact computers are ubiquitous in everyday life. This unit challenges how we view computers through the examples of processors in kitchen scales and digital cameras, as well as a work of art that, at heart, is a computer.

This OpenLearn course provides a sample of level 2 study in Author(s): The Open University

Take your teaching online
In this free course, Take your teaching online, you will gain  knowledge fundamental to delivering effective teaching online. You will hear about the experiences of real educators, be introduced to cutting edge research, and understand the ideas and tools that shape how we teach and learn online. You will also learn useful methods that will guide you to test out these new ideas in your own practice. Author(s): Creator not set

Internet of everything
The internet of everything (IoE) is the networked connection of people, process, data and things. As more people, data and things come online, we develop processes to harness the vast amounts of information being generated by all these connected people and things. The goal of this free course is to introduce you to fundamental concepts and technologies that enable the IoE and the internet of things. Author(s): Creator not set

Objectives for Section 4

After studying this section you should be able to do the following.

• Recognise and use the terminology: function, signature, domain, semantics, input set, output set, precondition, postcondition.

• Suggest appropriate signatures and preconditions for functions corresponding to a variety of processes on numbers, characters and sequences, including those with more than one input and those that return a Boolean value.

• For
  Author(s): The Open University
  

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4.3 Character code functions

Many programming languages provide two functions associated with the character codes (see Table 2). We shall call these functions ASC and CHR. ASC takes a character as input, and returns the integer giving the ASCII code of the input character. CHR returns the character whose ASCII code is the input inte
Author(s): The Open University

Processes that can be applied to data

Having looked at some forms of data, we now turn our attention to processes that can be applied to data. Each process that we consider in this section will input data of a specified form, and will result in a corresponding value. For example, one process, which we will call ASC, takes a character as input, and has as its resulting value the integer giving the ASCII code of the input character (as listed in Author(s): The Open University

3.4 Representing data in applications

Suppose that you are designing software for some application. You will be working with a programming language that enables you to communicate instructions to a computer. In this programming language, certain forms of data will already be represented electronically. These will include common forms of data, such as numbers, characters and sequences. In any particular application, you are likely also to be concerned with forms of data that are peculiar to that application. Having identified some
Author(s): The Open University

Learning outcomes

After studying this course, you should be able to:

• understand ways in which data may be stored and processed

• distinguish between different forms of data, and use notations introduced in the course to show different forms of data

• appreciate that fine details may be important when interpreting formal notation (for example, different types of brackets may be used to distinguish between different forms of data)

• interpret a given function
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References

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