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2 Black holes: a reminder

You may have previously met the formation of a black hole at the end of the life of a massive star. Accreting black holes, which were formed in this way, are members of close binary star systems.

A black hole is formed when self-gravity causes material to collapse to such high densities that the escape speed (or escape velocity) reaches the speed of light. Using Newtonian dynamics we can calculate the magnitude of the escape velocity from planet Earth (mass M E
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Peter McDonald on Censorship in South Africa
Peter McDonald talks with Oliver Lewis about censorship, its philosophical basis and general history within Apartheid South Africa.
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Islam in the West
This course is designed to stimulate informed debate about the role of Islam in western societies. Issues explored include the diversity of western Muslim populations and leaders; the role of the media; Muslim education and social and political engagement; and the politics of multiculturalism. Controversial Muslim intellectual, Tariq Ramadan provides a challenging insider’s perspective on the issues discussed, plus other interviews with authors, critics and Muslim community leaders. The course
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3.2.1 Remarks

  1. By ‘contains’, we mean that we can find part of the surface that is homeomorphic to a Möbius band. The edge of the Möbius band does not need to correspond to an edge at the surface, so that a surface without boundary can be non-orientable (as we shall shortly see).

  2. When seeking Möbius bands in a surface, it can be helpful to look at all possible closed curves on the surface and thicken these into bands.

  3. Remember, fro
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4.5 M is for Method

Method is about the way in which a piece of information is produced. This is quite a complex area as different types of information are produced in different ways. These are a few suggestions to look out for:

Opinions - A lot of information is based on the opinion of individuals. They may or not be experts in their field (see P for Provenance) but the key message is to be clear that it is just an opinion and must be valued as such.

Research - You don't have to be an
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1.5.3 Looking forward: implications and possible consequences

But what are the implications of these developments and trends? Clearly the emergence of a strong east-Asian bond market could threaten both the US dollar and the Euro markets, but this development is still in its infancy, and there are significant political and economic differences of interest amongst the possible east-Asian participants in such a market. So for the time being it will be the Euro and the US dollar that hold centre stage. But in as much as the Euro becomes a stronger currency
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Best Amazing Experiment Ever-Liquid in Beaker Making Blob Form
Experiment by google science team in which a liquid is poured into a beaker. It overflows and makes a blob like form (Running Time 0:16).

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Parties, Campaigns and Representation: The Political Impact of Blogs and Social Media
Panel discussion during the Oxford Social Media Convention 2009 on whether the outcome of political careers and even campaigns is increasingly dependent on the successful mastery of new communication tools including social media. The outcome of political careers and even campaigns is increasingly dependent on the successful mastery of new communication tools including social media. Many MPs and members of Congress are embracing the use of social networking tools to keep in touch with their const
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A tribute to the world of myth: Ovid and Holkham Hall
How do the themes of classical mythology come to be refashioned through the ages? Holkham Hall in Norfolk, England, is the estate of an 18th century gentleman, Thomas Coke - a scholar of epic classical authors and avid collector of the cultural beauties of the past. This album offers an opportunity to explore his house and prolific art collection, including his lavishly illustrated manuscript of Ovid's "Metamorphoses". Ovid inspired artists ranging from 2nd century sculptors to medieval illustra
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2.3.3 Landscape

You have heard this point discussed on the recording. ‘Kinloch Ainort’ is a rarity in MacLean's work – a poem ostensibly concerned with nothing but description of natural phenomena. Yet the erotic charge is unmistakeable. ‘Antlered bellowing’ is that of stags in rut. In ‘A Spring’, however, there is a conflict between love and landscape: the poet, obsessed with the image of his love in the water, is cut off from the glens and mountains which are indifferent to his obsession with
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Mythbusters explain the mentos and diet coke demonstration.
The mythbusters carry out a test to see what makes mentos and soda react. It all depends on surface area (01:57).
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Adrian Hill on Vaccination Research
Interview with Professor Adrian Hill, Director of the Jenner Institute for Vaccine Research in which he and student Richard Morton talk about the history of the Jenner Institute and the work currently being done to find TB, HIV and Malaria vaccines.
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Meet a Museum Curator at the Metropolitan Museum of Art
Watch this video to take a virtual field trip to the Metropolitan Museum of Art in New York City.  In the video, a student visits the world famous museum and learns about the work of a museum curator.  ( 3:30)
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4.2 'Biological control'

We are also guilty of importing exotic species, some of which, like the rhododendron (imported from Asia to Europe), have run riot in the absence of natural predators or primary consumers, and so have tended to out-compete native plants. Sometimes introductions have been accidental; rats and many disease-causing organisms have spread around the world via relatively modern transportation such as sailing ships. However, deliberate introductions, such as the rhododendron, have been made with wor
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4.3 R is for Relevance

Relevance is an important factor to consider when you are evaluating information. It isn't so much a property of the information itself but of the relationship it has with your question or your 'information need'. For example, if you are writing an essay about robotics a book or website about green energy would probably not be relevant. So there are a number of ways in which a piece of information may not be relevant to your query:

  • geographical (It m
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Thomas Burns Memorial Lectures 2012: Rev Dr Wiliam Willimon – The Future of Preaching
The Department of Theology and Religion presents lecture three of the 2012 Thomas Burns Memorial Lecture series. Given by the Reverend Dr William Willimon, Bishop of the United Methodist Church in Alabama, this presentation covers the topic “The Future of Preaching”. 2 August 2012.
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6 Population growth

Earlier it was stated that three factors check population growth. These are predation, disease and insufficient food supply. For much of our history, our ancestors’ numbers were indeed limited by wars, disease and famine. The world population remained relatively stable until around 300 years ago. Then at the beginning of the 19th century (100 years after population growth started its geometric increase), the demographer Thomas Malthus predicted that population growth would outstrip food pro
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Philosophy and the Human Situation
Philosophy and philosophical enquiries are relevant in some shape or form to many aspects of everyday life, for example our treatment of the environment, the rapidity of today's technological progress, whether animals should have rights and if so how they should compare to ours. Philosophy also encompasses questions about the existence of God, how life is sustained on earth, and even at what point should the Government intrude on a person's freedom. This album introduces the study of philosophy
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IPL: Hoka: Motivators of Time
Professor Poia Rewi of Te Tumu - School of Māori, Pacific and Indigenous Studies, delivers his Inaugural Professorial Lecture, "Hoka: Motivators of Time". Professor Rewi (Tūhoe, Ngāti Manawa, Te Arawa) works on a regional and national level in multiple areas of Te Reo promotion, teaching and research. 14 July 2016.
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