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3.4 Penetration depth

The characteristic length, λ, associated with the decay of the magnetic field at the surface of a superconductor is known as the penetration depth, and it depends on the number density ns of superconducting electrons.

We can estimate a value for λ by assuming that all of the free electrons are superconducting. If we set ns = 1029 m−3, a typical free electron density in a metal, then we find that


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7 Poems that don't rhyme

Are poems that don't rhyme prose? Not necessarily. Virginia Woolf (1882–1941), a novelist rather than a poet, and T.S. Eliot (1888–1965), known particularly for his poetry, both wrote descriptive pieces best described as ‘prose poems’. These look like short prose passages since there is no attention to line lengths or layout on the page, as there was, for example, in ‘Mariana’. When you study Shakespeare you will come across blank verse. ‘Blank’ here means ‘not rhymin
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Wynne - Guy the Gorilla DP183092

*

Crystal Palace Park, Sydenham, Greater London. David Wynne sculpture 'Guy The Gorilla'. Photographed by Chris Redgrave in 2016.
© Historic England


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Episode 25 – Season 4 – Coffee Break Spanish

Mark and Carmen are back with another episode of Coffee Break Spanish Season 4. In this episode we’re reading María’s diary entry following the first day of the dive for the missing treasure. Language points covered include the imperfect subjunctive following antes de que, the words madrugar and trasnochar, and the subtle difference between pasar miedo and tener miedo.

In the preview episode available here on the Radio Lingua site, on Author(s): No creator set

Kerry says time to make 'hard decisions' in nuclear talks with Iran
Subscribe: http://smarturl.it/reuterssubscribe Kerry says made "genuine progress" in nuclear talks with Iran but significant gaps remain Subscribe: http://smarturl.it/reuterssubscribe More 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, financial, national, and international news. For over 160 years, Reuters
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Dieren in de winter
trekvogels.png

Tijdens deze les ontdekken leerlingen hoe dieren zich voorbereiden op de winter. Zo leren ze o.a. dat dieren een wintervacht krijgen en dat sommige dieren een winterslaap houden. De les wordt afgerond met een memory en en quiz. 


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'Birdman,' 'Budapest Hotel' lead Oscar nominations with 9 nods each
Show business satire "Birdman" and colorful caper "The Grand Budapest Hotel" led the nominees for Academy Awards with nine nods apiece. 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, financial, national, and int
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Lecture 1 - Introduction to Food Toxicology - Video
Course requirements, motivation for undertaking this course of study.
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COM 351: Documentary Studies
This course will allow students to study the methods by which documentary work is conducted and to complete a documentary project of their own. The course will connect the qualitative methods of the social sciences and the humanistic concerns of the arts by allowing students to study documentary subjects as captured by non-fiction, photography, film, tape recorder, and the world wide web. Special emphasis will be placed on narrative and metaphor.
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Acknowledgements

The content acknowledged below is Proprietary (see terms and conditions) and is used under licence.

Grateful acknowledgement is made to the following sources for permission to reproduce material in this unit:

Figures

Figure 1a: Courtesy Robert Saunders;

Figure 1c: Mark Hirst and David Shuker/ Open University;

Figure 1d: Dr Thomas Broker;

Figure 1e: Dr George Pala
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3.2 Business operations: function or process?

Traditionally, an enterprise's activities are organised according to a structure based on the well-known business functions: marketing, purchasing, finance, human resources, research and development (R&D), operations, and so on. The exact function title varies from organisation to organisation, but each function has its own more or less well-defined sphere of activity. It carries out its various tasks and passes on information or artefacts to other functions for them to work on. For example,
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6.2.2 Database servers

To be able to search a website like Lakeland's requires not only a web server but a database server. Like a web server, a database server is a computer that responds to requests from other computers. Its task is to find and extract data from a database.

The web and database servers form part of a distributed system. This means that separate computers exchange data and information across a network (in this case the internet) to produce results for a user. For
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3.2 Using formulas

Formulas are important because they describe general relationships, rather than specific numerical ones. For example, the tins of paint formula applies to every wall. To use such a formula you need to substitute specific values for the general terms, as the following examples show.

Example 8
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2.3 Horizontal communication

In the OSI reference model there is a clear separation of services and protocols, but this separation is not always evident in practical applications, so it is worthwhile spending some more time on the differences between them. A service is provided by one layer to the layer above, and the capabilities of a service are defined in terms of primitives and their parameters. A service relates to two adjacent layers in the same system. In contrast, a protocol defines the communication between two
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7.2 Organisational benefits

For The Open University as an organisation, OpenLearn has brought a range of further benefits. There has been a steady flow of students recruited whose first exposure to OU content has been through OpenLearn. It is estimated that several thousand students have now registered with the OU through OpenLearn, generating real value in fees. In addition, inquirers who first use OpenLearn turn out to be more likely to become a student than if they came through other routes such a press campaign, or
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7 Logarithms

The equation 23 = 8 means that 3 is the index of the power to which we raise the number 2 to produce 8.

A logarithm is an index, and in this example, 3 is the logarithm of 8 to the base 2. We write this as

Log2 8 = 3

These two equations are identical: 23 = 8 and log2 8 = 3

They express the same fact in the language of logarithms.


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Deepening capacity through innovative research design
This paper describes the design of a major development and research project within the UK's Teaching and Learning Research Programme.,48,56,114,120,126,24,30
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Rights not set

2 Explaining fertility decline from a feminist perspective

Feminist theory underpins one of the most influential historiographies of fertility decline and it allows us to foreground gender as a dominant feature in questions of heterosexuality and parenthood. This is not to suggest that divisions of class, ‘race’, (dis)ability and generation are unimportant in this historical phenomenon, and any full understanding of fertility decline would be incomplete without including them. But in this course the main focus will be on gender and these other so
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Lesson 05 - one Minute Luxembourgish
In lesson 05 of One Minute Luxembourgish you will learn to say that you're learning Luxembourgish. Remember - even a few phrases of a language can help you make friends and enjoy travel more. Find out more about One Minute Languages at our website - http://www.oneminutelanguages.com. One Minute Luxembourgish is brought to you by the Radio Lingua Network and is ©Copyright 2008.Author(s): No creator set

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Conclusion

This free course provided an introduction to studying Science. It took you through a series of exercises designed to develop your approach to study and learning at a distance and helped to improve your confidence as an independent learner.


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