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Model of the monoclinic ZrO2 unit cell
Rotating model of the monoclinic ZrO2 unit cell.
Author(s): DoITPoMS, University of Cambridge

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6.3.3 Photomultiplier tubes and detection circuitry

The visible photons are collected by an array of photomultiplier tubes behind the crystal. These convert each visible photon to an electron and then multiply the number of electrons sufficiently to give a voltage pulse. Because the number of visible photons is proportional to the energy of the incoming gamma ray, the height of the pulse depends on this energy. This gives a method of counting the numbers of gamma photons at different energies that reach the crystal.

A resistive network c
Author(s): The Open University

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1.8.1 Making and using field sketches

How do we start to make sense of a rock exposure? Drawing a sketch is one of the best ways to start, as it forces you to notice many aspects of the exposure. It also helps you to build up a picture of which aspects are significant and which are incidental or even irrelevant to a geological study. The aim of a field sketch is that it provides a record of your observations (along with notes taken at the same time, and also perhaps a photograph to record details). A sketch is complementary to a
Author(s): The Open University

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UNSPECIFIED - UNSPECIFIED Keywords:UNSPECIFIED
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2.1 Structure and function of the outer and middle ear

Figure 1 is a diagram of the human ear. The outer ear consists of the visible part of the ear or pinna, the external auditory canal (meatus), and the tympanic membrane (tympanum) or eardrum. The human pinna is formed primarily of cartilage and is attached to the head by muscles and ligaments. The deep central portion of the
Author(s): The Open University

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Learning outcomes

After studying this course, you should be able to:

  • demonstrate an awareness of the issues surrounding public understanding of science

  • engage with some of the debates surrounding this topic.


Author(s): The Open University

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Acknowledgements

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

Couse image: Mike in Flickr made available under Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence.

The content acknowledg
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3.4 Second messengers

In the previous section, we have discussed the principles of second messengers (Section 1.5) and, in particular, those produced by PLC (IP3 and DAG) and PI3 kinase (PI(3,4)P2 and PI(3,4,5)P3). We shall now consider the roles and mechanisms of action of the other chief mediators, which are Ca2+ ions, cAMP and cGMP
Author(s): The Open University

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9 Metre

As we have seen, scansion is the act of mapping out stress patterns in order to ascertain the metre (rhythm). In the accentual-syllabic system, the dominant tradition in English, both accents (stresses) and syllables are measured and counted. In accentual metre, the stresses are counted and the syllables can vary. In syllabic metre, the syllables are counted, while the stresses can vary.

Here is pentameter, the line of fi
Author(s): The Open University

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1.3 When is the right time to take notes?

Any time that suits you! Increasingly we live in an age where there is more information than we can possibly hope to deal with. One of the most important skills you (or any of us) can develop is how to cope with all this information. Note taking is just one skill that will help you do this. It is important to get into the habit of making notes, and the best way to do this is to find a method that suits you (and the medium you are working in).


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Oxford Women in Politics with Dr Anne-Marie Slaughter
Dr Slaughter discusses workplace policies and the value we place on care of children and other loved ones.
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7.7 Planning for quality

Having considered estimating for time and for costs, the third dimension of projects – quality needs to be considered. The need to achieve a particular level of quality may mean that more time must be spent completing certain tasks or that more resources must be made available for a particular purpose. Once the time and cost estimates have been made, review them to ensure that this estimate will allow an outcome of the right quality.

Many organisations have corporate quality assurance
Author(s): The Open University

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1.7 Interlude

Now that we have covered the features found in igneous, sedimentary and metamorphic rocks, and seen how these features can be explained by the processes that formed the rocks, here is a useful point at which to have a break before continuing with the next section. Before returning, you might like to see for yourself what types of rock you can find in your area. Can you identify their texture, or spot any fossils? Surfaces that haven't been obscured by grime or lichens are by far the best, as
Author(s): The Open University

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9.1 The psychological arena

The examples in the previous section followed the traditional medical approach, namely that there is a disease, it can be diagnosed (identified), and the cause of the disease, be it viruses, bacteria, pathogens, genes or poisons, can be sought. This section moves away from the medical arena and into the psychological arena, where the symptoms are behavioural. In this case, the symptoms are socially unacceptable behaviour and to the list of causes just mentioned is added family circumstances a
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A Jewish soldier from Eretz Israel in the British Army, describes meeting survivors in Italy
http://www.yadvashem.org/yv/en/exhibitions/dp_camps_italy/index.asp The exhibition “DP Camps and Hachsharot in Italy after the War”, brings the story of the many thousands of Holocaust survivors in the dozens of DP camps that operated in Italy after World War II. While these camps served as temporary transit stations for the survivors, it was there that they also started to cope with the enormity of their loss, at the same time preparing themselves for a new chapter in their lives with the
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5.2.1 Microwave

You saw the importance of microwave transmission for newsgathering in the Higgins extract. The term 'microwave' identifies a particular range of frequencies used for radio communications. The range of frequencies that are referred to as 'microwave' is not exactly defined (or, rather, slightly different ranges are used in different contexts), but roughly speaking it is from about 200 MHz to 50 GHz. [Remember that MHz stands for megahertz, which is 1,000,000 Hz (106 Hz) and GHz is gi
Author(s): The Open University

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Collaboration for the Cross Cultural study of Contemporary Careers
Professor Michael Dickmann and Dr Emma Parry jointly direct the quantitative research phase of an important study exploring global careers. The '5C' project, the collaboration for the study of cross-cultural contemporary careers of researchers from 6 continents, looks at perceived career transitions and career success in more than 30 countries. It is probably the world's largest academic collaboration in the careers arena and envisages to draw up a world map of career influencing factors, career
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1.4 Law, skills and learning outcomes

This course has a number of learning outcomes. In relation to a course of study, a learning outcome is simply something which you should be able to do (and to show that you can do) at the end of studying a particular course. The learning outcomes are concerned with ability to demonstrate knowledge and understanding of company law, and also ability to demonstrate a range of skills, including use of IT, research and problem-solving.

In addition to being listed at the beginning of the cour
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3.2.1 Thermal cracking

The bulk of the major monomer and intermediate, ethylene (C2H4), is still produced in the UK by steam cracking without the use of catalysts. Paraffinic feedstocks are best for optimising ethylene yields, and the severity of cracking is specified by the rate of disappearance of a marker compound, usually n-pentane. The severity of the reaction can then be defined as follows:

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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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