3.3 Optical amplifiers

Figure 22 shows in outline one possible structure for an Erbium-doped fibre amplifier (EDFA).

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Boscombe Pier entrance DP162125

*

Neck Building, Boscombe Pier, Undercliff Drive, Bournemouth Dorset. General view of pier entrance and canopy.
© Historic England


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Introduction

This unit examines how self-assembled structures based on lipids and proteins provide a framework for cellular processes.

This unit is an adapted extract from the Open University course Engineering small worlds: micro and nano technologies (T356).


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Battlefield: The Battle of Midway (3/12)
In June 1942, the most decisive naval battle of WWII was fought between the United States of America and the Japanese empire. Waged entirely of aircraft carriers, hundreds of miles apart, the Battle of Midway was the first major fleet encounter in which the ships on each side never came within visual range of enemy vessels. Victory or defeat depended not on the big guns of battleships, but on the carrier born bombers and torpedo bombers flying over vast tracks of ocean to seek and destroy their
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2 Altering the environment

Later in this course we will be considering a number of ways in which humans alter their environment.

Question 3

In what ways do you think we are altering the environment?


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Professor Tania Lewis plenary address FILLM conference, India
‘Magical Modernities’, Invited Plenary Address for the Triennial conference of FILLM (the International Federation for Modern Languages and Literatures), University of Delhi,15-17 March 2017. Magical Modernities? Post-secularism and spiritualism on Indian television Channel surfing on morning television in India—a truly bewildering experience given there are now 800 plus channels and rising—involves navigating a mix of news and sports channels, children’s shows, cookery shows, soaps,
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3.5 Reactions and reflections

Activity 8

0 hours 15 minutes

Read the Case Study ‘Sarah's story: Sarah and John’

Make notes on the reactions presented in the Case Study.

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4.2 Capitalism – naturally

Business can learn to integrate ecological thinking into the core of its thinking and become the hub of a sustainable society. This is the claim of the business learns position. As environmentalists have spent over 30 years portraying business as the arch-villain of the piece, this is a grand claim. One of the people who have stated it most clearly is Ray Anderson, head of the US carpet giant Interface (Author(s): The Open University

3.3.1 Try some yourself

Activity 22

A friend has been quoted a price of £25.50 per square yard for tarmac surfacing of his yard. The yard measures 6 yards by 10 feet. Here is his calculation of the total cost. What is wrong with it?

cost =
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The Water Cycle - By Students For Students
This short video contains stop motion animation cartoons
on the stages of the water cycle.  This was created by a teacher's class.  It would be helpful for early elementary school students.

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The Industrial Revolution
Before the Industrial Revolution everything was produced by hand. Beginning in the 19th century, advances in manufacturing revolutionize the American way of life. A man named Samuel Slater memorized the plans for factories and brought them over to America. This started up the Industrial Revolution in America. Americans began moving into cities to work in factories. Assembly lines started appearing in factories which led to unskilled workers like women and children working. (2:31)
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Introduction

Free trade or fair trade? This unit will help you to analyse the relationship that exists between developed and developing countries under the World Trade Organization regime of Development Round negotiations. The current world trade regime has a very mixed record in promoting growth and reducing poverty.

This material is from our archive and is an adapted extract from Making the international: Viewpoints, concepts, and models in international politics and economics (DU321) which
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Ms. Latitude and Mr. Longitude
Students often confuse latitude lines and longitude lines.  They can remember that the terms are lines on a map, but can't remember which is which.  This brief video clip shows a trick that Mrs. Matthews students use to help them remember the difference. They create artwork showing Mr. or Ms. Latitude (with an attitude) and Mr. or Ms. Longitude (with everything long). (01:24)
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Ina Budde, German Designer - Fast Fashion
Taking a critical look behind the scenes of the fashion industry with an exhibition that undresses the social, economic and environmental impacts of cheap fashion. https://www.rmit.edu.au/events/all-events/exhibitions/2017/july/fast-fashion--the-dark-side-of-fashion
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7.1 Climate models

To understand climate change it is necessary to construct climate models, to explore and predict interactions between different factors. Models are tested for accuracy against known sets of data, before being run forward to predict future changes.


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Présentation de l'expédition "La Planète Revisitée" en Papouasie (Vidéo)

En 2012/2013, le programme d'expéditions du Muséum national d'Histoire naturelle et Pro-Natura international "La Planète Revisitée" ont organiseé une grande expédition en Papouasie-Nouvelle-Guinée.


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2 One gene–one protein

A gene is a short section of a long DNA double helix molecule, which comprises a linear sequence of base pairs.

SAQ 1

What is the basic (primary) structure of a protein?


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The second Space symposium- learning spaces
This presentation discusses the various elements that deem enterprise education spaces as fit for purpose
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http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

5.8 Additional treatment

As a result of strict standards set by the EU Directive on the Quality of Drinking Water, it is now often necessary for drinking water to have further treatment to remove components such as nitrates and trace of organics.


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1.1 How has the human population grown?

For most of human history there have been relatively few people in the world. Figure 2 shows that only over the last 50 years have numbers really shot up, and that, at the turn of the century, the population reached over six billion.

Figure 2
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