A simple but useful description of the electrodynamics of superconductivity was put forward by the brothers Fritz and Heinz London in 1935, shortly after the discovery that magnetic fields are expelled from superconductors. Their proposed equations are consistent with the Meissner effect and can be used with Maxwell's equations to predict how the magnetic field and surface current vary with distance from the surface of a superconductor.

In order to account for the Meissner effect, the L
Author(s): The Open University

4-point bending under a circular polariscope of annealed polycarbonate bar with a notch
Annealed, polycarbonate bar with notch undergoing 4-point bending under a circular polariscope. From TLP: Introduction to photoelasticity, http://www.msm.cam.ac.uk/doitpoms/tlplib/photoelasticity/index.html
Author(s): DoITPoMS, University of Cambridge

As a student, you're likely to engage in a variety of writing tasks. You'll almost certainly handle significant amounts of text and, depending on your course, perhaps also numbers or diagrams.

This section looks at the different way that you write using a computer, and also provides some referencing advice.

Author(s): The Open University

The EU operates through institutions created in the treaties. These institutions can have decision-making powers, law-making powers or may act as part of a checking and consultation procedure.

The institutions include:

1. The European Parliament (represents the people of the EU).

2. The Council of the European Union (represents the member states of the EU).

3. The European Commission (represents the interests of the EU).

<
Author(s): The Open University

How can you collect quantitative data that summarise the nature of a habitat when it is three-dimensional? How, in fact, do you collect quantitative data?

Multi-storied habitats where the components have a different scale are usually recorded storey by storey, but using much the same methodology. There are two standard ways of collecting data quantitatively. The first involves recording species present within a standard area such as 10 cm Ã— 10 cm, 0.5 m Ã— 0.5 m, 1 m Ã— 1 m, or 10 m Ã—
Author(s): The Open University

Groepsopdracht waarbij de cursisten de stad Antwerpen en haar verschillende wijken leren kennen.

Author(s): No creator set

Section 3 is an audio section. We begin by defining the terms group, Abelian group and order of a group. We then demonstrate how to check the group axioms, and we extend the examples of groups that we use to include groups of numbers â€“ the modular arithmetics, the integers and the real numbers.

Click the link below to open Section 3 (11 pages, 703KB).

Author(s): The Open University

How did we Reach the Present Crisis in Social Care and what are the Solutions? [Audio]
Speaker(s): Professor Pat Thane | The social and health needs of older people are not easily separable. But care has been institutionally separate since 1948. Did this help create the current crisis? Pat Thane is Research Professor in Contemporary History, King's College London. Robin Archer is the Director of the Ralph Miliband Programme, LSE. The Ralph Miliband Programme (@RMilibandLSE) is one of LSE's most prestigious lecture series and seeks to advance Ralph Miliband's spirit of free social
Author(s): No creator set

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 course:

Course image: fdecomite in Flickr made available under Creati
Author(s): The Open University

This unit takes you on a journey of discovery where you are invited to challenge ideas, both new and old, in relation to mental health. It is made up of a series of three extracts. The first extract, â€˜Boundaries of explanationâ€™, sets out the theme of boundaries: boundaries within and between groups; within and between explanatory frameworks; and within and between experiences of mental health and distress. The second extract, â€˜Whose risk is it anyway?â€™, considers a critical account of
Author(s): The Open University

OU Knowledge Network, â€˜Guidelines for describing visual teaching materialâ€™ http://kn.open.ac.uk/ public/ index.cfm?wpid=2709

US National Public Website on Assistive Technology

Author(s): The Open University

1 Write down the coordinates of the point P on each of the graphs below and interpret these coordinates in terms of the labels on the axes.

Author(s): The Open University

In the meantime Owen joined the town's social and intellectual elite, which like its politics was largely dominated by Dissenters. They were prominent in the Manchester Literary & Philosophical Society which Owen joined in 1793. There he associated with some significant reformers, heard papers on a wide range of intellectual, industrial and social topics, and himself presented papers dealing with such issues, including one on education.

The society was founded in 1781, the co-founders b
Author(s): The Open University

I will now elaborate on my answer from Exercise 1. I'm doing this because my internet search revealed more than I've written in the above answer, and to show that the invention of the telephone and its use by consumers is not as plain and simple as you may think. You were not expect
Author(s): The Open University

Crackdown in Syria
Aug. 7 - At least 57 Syrian civilians are killed in assaults by government forces Sunday as Saudi King calls for the end to the bloodshed. Deborah Lutterbeck reports.
Author(s): No creator set

An introduction: Sacking prime ministers
A short video introduction to this album
Author(s): No creator set

Anisotropic thermal conductivity in quartz: parallel to c-axis section
A section of quartz cut parallel to the c-axis being heated from a point at its centre. An ellipse shows that the thermal conductivity in this plane is direction-dependent. From TLP: Introduction to Anisotropy, http://www.msm.cam.ac.uk/doitpoms/tlplib/anisotropy/thermal.php
Author(s): DoITPoMS, University of Cambridge

Time: <10âˆ’36 s

Temperature: >1028 K

Energy: >3 Ã— 1015 GeV (i.e. >3 Ã— 1024 eV)

At the very earliest times in the history of the Universe, we can only presume that a superunification of the four interactions was in operation. Unfortunately, no reliable theory of superunification is yet available, so nothing can be said about the contents or behaviour of the Universe in its earliest moments. Indeed, it
Author(s): The Open University

Erie Lackawanna Pedestrian Bridge Ribbon Cutting
University of Rochester President Joel Seligman joined Mayor Thomas S. Richards, City Councilmember Elaine Spaull, and members of the Rochester community to celebrate the official opening of the Erie Lackawanna Pedestrian Bridge. The newly renovated railroad bridge, which is now open to walkers, joggers, hikers, bicyclists, and more, spans the Genesee River approximately 1.5 miles south of downtown Rochester, linking the east and west banks of the trail and establishes a new access point between
Author(s): No creator set

The Stars - Special Tricks to See More With Telescopes
This is a fascinating short video that instructs the viewer about the stars and how to identify them. There's an amazing range of color in the stars - from subtle to striking. Here's how to best see distant suns. This is an episode of "The Star Party," a video guide to amateur astronomy from the crew of Orion Telescopes and Binoculars. Suitable for upper elementary, middle, and high school students. (02:59)
Author(s): No creator set