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2.1 Introduction

Proportion is another way of expressing notions of part and whole. You might say that the proportion of village inhabitants who are children is a quarter, or that the proportion of fruit juice in the punch is two thirds, or that the proportion of sand in the concrete is three quarters.

All these examples involve the fractions Author(s): The Open University

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5.1 Identifying edges of a polygon

In this section, we revisit the construction of surfaces by identifying edges of polygons, as described in Section 2. Recall that, if we take any polygon in the plane and identify some of its edges in pairs, then we obtain a surface. When specifying how a given pair of edges is to be identified, we choose one of the two possible re
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Water on the Web
WOW lessons are designed for infusion into the existing science curriculums for college freshmen and advanced high school students. The lessons use the aquatic environment and real lake data to explore basic science concepts through two different approaches: a directed study (״Studying״) and an inquiry (״Investigating״) approach. The directed studies allow students to apply and learn concepts through direct, guided experience. The inquiry lessons provide a more open-ended opportunity for stu
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4.2 A resting heart rate

We can understand the role of the athlete's heart in sport a little more clearly by looking at typical heart rates for trained athletes compared with heart rates for non-athletes. A commonly used measure of heart efficiency is called the resting heart rate. This is the number of times per minute that the heart beats when a person is relaxed and resting. The heart rate for a reasonably healthy adult when they are relaxed and resting is in the range of 55–65 beats per minute. This means that
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1.3.2 Recurrent themes

When the accounts of people who have described a near-death experience are looked at side by side it is possible to identify some common features. This isn’t to say that all of these features are present in every account, but that amidst variations there are certainly recurrent themes. The following list is compiled from a variety of studies, including the important study undertaken by Sabom (1982), himself initially sceptical.


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Accelerated Culinary Arts Program (ACAP) Certificate at the CIA
You have your hospitality, food science, or nutrition degree in hand, and you're primed to excel in one area of your chosen profession. But do you have the culinary skills to tackle the food side of the equation? Get prepared—and build on your experience—with ACAP. No one gives you the level of chef training to excel in the world of professional kitchens like the CIA. Designed exclusively for graduates of bachelor's degree programs in hospitality and tourism management, food science, and nut
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Describing Animals (Animation)
This short animation presents and describes different animals. You can see images and read the description of insects, birds and fish. Run time 01:00.
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1.2.2 Summary

  • The results of successive editions of the Eurobarometer show that in most EU countries only a very small percentage of people, around 5 per cent, declare having an exclusive European identity, while up to 50 per cent do not have any sense of European identity.

  • European political identity is weak and there is a great variation across states.


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Full-Scale Simulations as Tool for Developing Spatial Design Ability
Spatial Design Ability has been defined as the capability to anticipate effects (psychological impressions on potential observers or users) produced by mental manipulation of elements of architectural or urban spaces. This ability, of great importance in choosing the appropriate option during the design process, is not specifically developed in schools of architecture and is partially obtained as a by-product of drawing, designing or architectural criticism. We use our Laboratory as a tool to pr
Author(s): Abbo, I.A., La Scalea, L., Otero, E. and Castaneda

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Rights not set

Unilateral Free Trade

The Only International Economic Policy That a Country Needs: "Mind Your Own Business and Set a Good Example."

The international economic scene is dominated by state interventions at all levels. Daily we read of disputes over exchange-rate manipulation, protectionist tariffs followed by retaliatory tariffs, highly regulated free-trade blocs that erect trade barrie
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7.2 An EU constitution: moving the debate on

In the next activity you will be able to build upon the previous one and observe the way in which the debate on the new EU constitution has progressed and moved to another level on its way to ratification.

Activity 7 A snapshot from the EU constitutional debate (2)


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3.1 Addiction article 1

The first selected reading provides a wide ranging review of the theories associated with addiction illustrating how the subject can be investigated at a number of different levels of analysis. The second article explores one particular level further, the pharmacology of drug addiction, and asks why specific drugs are more likely to induce addictive behaviour.


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Recommendations for banking reform
Dr. Josef Ackermann, Chairman of Zurich Insurance Group; Vice-Chairman of the Foundation Board of the World Economic Forum puts forward his thoughts on how the banking sector can better add value to society at large.
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A pressing engagement

Activity 14

Work through Section 1.5 of the Calculator Book. As you do so, bear in mind what you decided about the notes you made for the earlier sections—will you annotate the text itself in the margin, or do
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7 Review of unit learning outcomes

After studying this unit, you should be able to:

  • explain how Acts of Parliament originate:

    • party manifestos, national emergency or crisis, Royal Commissions, the Law Commission, Private Members' Bills

  • discuss the process by which rules become law and the role of Parliament in making legal rules:

    • first reading, second reading, committee sta
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3.4.3 Simulated environmental tests

The investigators wanted to know about the fatigue properties of the component, to find a feasible explanation of why it took 39 years for the eye bar to break. They needed information on the several stress corrosion mechanisms that were possible in the material, including hydrogen embrittlement, the effects of sulphur compounds such as H2S (hydrogen sulphide) and the effects of moisture and salt. Notched eye-bar material was loaded to failure in various environments.

In fact
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Global Leadership Summit 2013 Highlights
Beyond Heroes, Villians and Scapegoats: The Future of Leadership. Iceland President Olafur Grimsson, Unilever CEO Paul Polman were among the line up of big hitters at London Business School's annual leadership event.
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Keep on learning

Study another free course

There are more than 800 courses on OpenLearn for you to choose from on
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References

Nicola Morgan at ContinYou, [http://www.readingclub.org.uk, accessed 26 January 2007].
Jack Prelutsky, ‘I Met a Dragon Face to Face’ in Good Books, Good Times! By Lee Bennett Hopkins and Harvey Stevenson, HarperCollins.

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3.3 Mechanisms of eutrophication

Direct effects of eutrophication occur when growth of organisms (usually the primary producers) is released from nutrient limitation. The resulting increased NPP becomes available for consumers, either as living biomass for herbivores or as detritus for detritivores. Associated indirect effects occur as eutrophication alters the food supply for other consumers. Changes in the amount, relative abundance, size or nutritional content of the food supply influence competitive relationships between
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