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1.4 Stellar masses and stellar evolution

Measured masses range from about 0.08M to about 50M, a large range, with the Sun again showing up as an average sort of star. At the upper end we have some true monsters, but even at the lower end we have bodies that are still far more massive than the planets.

Author(s): The Open University

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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 functions, and the neces
Author(s): The Open University

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Reducing your ecological footprint
Concerned about your impact on the environment? Interested in learning how to shape a more sustainable future? This album shows you simple ways to adapt your lifestyle and how to think globally. Five video tracks demonstrate how to assess the ‘ecological footprint’ of your household, examine the effects of personal transport on the environment, and explore how your decisions as food consumers are part of a supply chain stretching across Europe and the rest of the world. They feature an energ
Author(s): The iTunes U team

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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

Introduction

For many of us the concept of attention may have rather negative connotations. At school we were told to pay attention, making us all too aware that it was not possible to listen to the teacher while at the same time being lost in more interesting thoughts. Neither does it seem possible to listen effectively to two different things at the same time. How many parents with young children would love to be able to do that! One could be excused for feeling that evolution has let us down by failing
Author(s): The Open University

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References

Anderson, M. (1993) ‘The social implications of demographic change’ in Thompson, F.M.L. (ed.) The Cambridge Social History of Britain Vol. 2, Cambridge, Cambridge University Press.
Bainham, A. (1999) ‘Defining parenthood: parentage, parenthood and parental responsibility – subtle, elusive yet important distinctions’ in Bainham, A., Sclater, S.D. and Richards, M. (eds) What is a Parent? A Socio-Lega
Author(s): The Open University

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Passive Building Design - student example 3 (Laura Graham)

Authors: 
Tom Sanya