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4.5 David Hume

This unit examines David Hume's reasons for being complacent in the face of death, as these are laid out in his suppressed essay of 1755, ‘Of the immortality of the soul’. More generally, they examine some of the shifts in attitude concerning death and religious belief which were taking place in Europe at the end of the eighteenth century, through examination of this and other short essays.

Hume was a pivotal figure in the Scottish Enlightenment and his death in 1776 was widely anti
Author(s): The Open University

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3 Aims

The aim of this section is to help you to think about how you study mathematics and consider ways in which you can make your study more effective.


Author(s): The Open University

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Acknowledgements

This material is from our archive and is an adapted extract from T175 Networked living: exploring information and communication technologies, which is no longer available to new students.

Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Author(s): The Open University

4.3 Optical networking

DWDM improves the utilisation of optical fibre for point-to-point links, but a further step in exploiting the potential of optical fibre comes from optical networking in which routeing or switching is done optically.

Optical networking is in its infancy, but the concept of the optical layer based upon wavelength channels is emerging. The optical layer effectively sits below the SDH layer in the network, and provides wavelength channels from one location to another.

An analogy can
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The week ahead: Who is the real Xi?
Our US editor gives us his forecast for Super Tuesday, China's Xi Jinping gets ready for sweeping leadership changes and Indonesia embarks on a new era of economic development
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Introduction

There are a wide range of different interactions between ‘science and the public’. Examples range from visiting a museum, or indulging in a science-related hobby, to reading a newspaper article about a breakthrough in the technique of therapeutic cloning, to attending a protest meeting about plans to build a waste disposal unit near to a residential area. Some such interactions are largely one-way; being a member of the audience for a ‘go-hear’ lecture, visiting a museum or‘‘liste
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2.2 Why fertilization may not happen

It is estimated by most practitioners that more than 50% of all conceptions are genetically abnormal, and it has been suggested that this results in part from the fertilizing of old eggs. Of course, good maternal health and adequate nutrition are also important for the production of good eggs. To maximize the chance of healthy offspring, perhaps intercourse should be timed so that sperm are present as soon as the egg is ovulated. But, as you have seen for practitioners of natural methods of c
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How To Write a Thesis Statement
This video explains how to write a  thesis. It goes step-by-step and is easy to follow with examples.

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Understanding the environment: Learning and communication
There is increasing recognition that the reductionist mindset that is currently dominating society, rooted in unlimited economic growth unperceptive to its social and environmental impact, cannot resolve the converging environmental, social and economic crises we now face. The primary aim of this free course, Understanding the environment: Learning and communication, is to encourage the shift away from reductionist and human centred thinking towards a holistic and ecological worldview.
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Hong Kong police dismantle protest site
Hong Kong police have dismantled the city's main pro-democracy protest site after hauling away protesters, ending more than two months of street demonstrations. Rough Cut (no reporter narration). Subscribe: http://smarturl.it/reuterssubscribe More updates and breaking news: http://smarturl.it/BreakingNews Reuters tells the world's stories like no one else. As the largest international multimedia news provider, Reuters provides coverage around the globe and across topics including business, fin
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Building Simple Machines: A Plant Quencher
How difficult can it be to water a plant? Pretty difficult when your objective is to build the most complicated machine possible to complete this simple task. In this video segment from ZOOM, Jillian demonstrates the use of ramps, wheels, pulleys, and other simple machines to construct her "plant quencher." Run time 01:16.
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Keep on learning

Study another free course

There are more than 800 courses on OpenLearn for you to c
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The relativistic Universe
Thanks to cutting edge technology, scientists can peer deeper into space than ever before. The audio tracks in this album feature Dr Robert Lambourne and Dr Stephen Serjeant of The Open University's Department of Physics and Astronomy. They introduce the origin of relativistic cosmology and share the latest ideas about the structure and evolution of the universe. Einstein’s general theory of relativity predicts the existence of black holes and gravitational waves, and the Cosmic Microwave Back
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The Enigma of Article 2(4): Interests and Norms in IR Theory
Over 60 years ago the USA agreed to give up its autonomy over the use of force by signing the UN Charter. Prof. Hurd uses this case study to better understand how states use international rules and how that use remakes both the rules and the states. Over 60 years ago the United States agreed to give up its autonomy over the use of force by signing the United Nations Charter, which includes a ban on war in Article 2(4). The willing self-limit by a Great Power of its sovereignty over war decisions
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Money talks: Trumponomics
Donald Trump's presidential campaign is astounding political analysts and flummoxing economists; and we also look at whether high denomination bank notes are useful only to criminals Correction: We attribute an analysis of Donald Trump's economic proposals at 2:40 minutes to the Tax Policy Centre, when in fact it is from the Committee for a Responsible Federal Budget. We regret the error.
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4.5 Some general results

We next establish some general results about Euler characteristics. We start with a theorem that tells us what happens to the Euler characteristic of a surface when we remove an open disc.

Theorem 10: Disc Removal Theorem

The Euler characteristic of a surface with an open disc
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Learning outcomes

After studying this course you be able to:

  • discuss the sequence of the events that are believed to have taken place in the history of the Universe, particularly the particle reactions that occurred in the first few minutes after the Big Bang, and the role of unified theories in explaining those events

  • manipulate large and small numbers in scientific notation, and calculate values for quantities when given appropriate numerical information.


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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 4.0 Licence

Grateful acknowledgement is made to the following sources for permission to reproduce materia
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