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2.2 Energy flow in ecosystems

You are about to meet some very large numbers, expressed in scientific notation, and some new units. The new units are those that are used to measure the amount of solar energy received by a part of the Earth's surface. Since plants are dependent on light for photosynthesis, the amount of plant material that ca
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8.2 An acrimonious debate

Fitzpatrick, M. (2004) Chapter 8 ‘The Lancet Paper’ taken from MMR and Autism: What Parents Need to Know, London, Routledge. Copyright © 2004 Michael Fitzpatrick.

There were two unusual aspects to the publication of the Wakefield paper and both contributed to the subsequent furore. The first was that it was accompanied by a critical commentary by Robert Chen and Frank DeStefano, two American vaccine specialists (Chen, DeStefano 1998). The second was that it was
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Apps and Data | Appy Mondays

In this weeks episode, Martin Beeby is joined by Steve Plank, Cloud Evangelist at Microsoft to talk about storing app data in the cloud. The tech session is provided by Mike Taulty who asks the question: which is faster, boiling an egg or setting up an Azure Mobile Service.

To join in the conversation and receive hands-on support and guidance from UK Tech Evangelists, use #appymondays on Twitter. For more on develop
Author(s): jaimekeenan

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2.1 Processors

Figure 2 shows an advertisement for a laptop. The main features of the computer are listed in this advert. One item on the list is ‘Processor: AMD E450 1.65 GHz’. So this computer uses an AMD E450 processor, running at a speed of 1.65 GHz. A processor is an essential component of a computer; it carries out, or executes, the instructions that make up the computer program. PCs use one main processor and several other ‘supporting’ processors, and adverts for PCs often specify what main p
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Het weer : De wetenschap vertelt
1.png

Dit dossier van EOS wetenschap bundelt artikels over het weer. Volgende onderwerpen komen in dit dossier onder meer aan bod:

  • betrouwbaarheid van buienradar;
  • hittegolf;
  • ontstaan van onweer en regen;
  • ontstaan van wolken;
  • ontstaan van …

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17.424 International Political Economy of Advanced Industrial Societies (MIT)
This graduate class is designed as a Ph.D.-level overview of international political economy (IPE), with an emphasis on the advanced industrial countries. It also serves as preparation for the IPE portion of the International Relations general exam. An important goal of the course is to use economic theories to identify the welfare effects, distributional consequences, and security implication of foreign economic policy decisions, and to use the tools of political science to analyze how interest
Author(s): Singer, David Andrew

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Content within individual OCW courses is (c) by the individual authors unless otherwise noted. MIT OpenCourseWare materials are licensed by the Massachusetts Institute of Technology under a Creative C

Geometrical Shapes in the Real World
How many shapes can you find???  This slide show presentation shows several pictures and asks the learner if the can find shapes in these pictures.

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9 Notes to help you complete your assessment

To complete your assessment portfolio you must include a contents page indicating how your reflective commentary in Part A and your evidence in Part B are related. An example of a suitable format for the contents page is in Figure 1 below.

Figure 1  (PDF, 1 page, 0.1MB)

Although the requirements of Parts A and B are listed sep
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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 a range of subjects. 

Find out more
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Keep on learning

Study another free course

There are more than 800 courses on OpenLearn for you to c
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Job & Career Fair Techniques 1
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Can Humans Reconnect in an Age of Isolation?
In his book, digital theorist Douglas Rushkoff explains how people can use technology to reconnect with each other, rather than allowing it to isolate them.
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A thirsty world: the future of water

Fresh water is becoming increasingly scarce, as climate change and population growth puts greater pressure on resources. But the problem is one of mismanagement, rather than supply. When Jair Bolsonaro was sworn in as Brazil’s president in January, he spoke of a national effort to fix the country’s economy and to tackle crime and corruption. Can he deliver on those promises? And how a big-budget Chinese film reflects the philosophy of the country’s leader.


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Confronting Objections to the Economic Approach
OpenStax College
By the end of this section, you will be able to: Analyze arguments against economic approaches to decision-making Interpret a tradeoff diagram […]

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3.3 Division

Division is probably the most awkward of the four arithmetic operations. Since you may have a calculator, you do not need to be able to carry out complicated divisions by hand, but you do need to carry out simple divisions in order to check your calculator calculations. Division is the reverse process of multiplication. The quantity 12 ÷ 3 tells us how many times 3 goes into 12. Since 4 × 3 = 12, 12 ÷ 3 = 4.

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2.4.3 Sulfur (S)

Most proteins contain about 1% sulfur, which occurs in the side-chains (R groups) of two of the protein-forming amino acids, methionine and cysteine.

Cysteine is particularly important in proteins such as collagen (found in bone, tendons, cartilage and skin) and keratin (found in hair and nails, as well as skin).

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2008.08.06 - Help Desk (Video)
Fall semester 2008. Each August (semester start) call volume goes up: they get 5500 calls. Working on first call resolution. Top issues: passwords. There are 1800 APs installed for wireless - this means lots of wireless calls.
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Amusing introduction to beryllium
This introduction to the element beryllium (atomic number 4) covers its main uses and properties.  It is very toxic, invisible to x-rays, expensive, and used in some high-tech equipment.  Those working with beryllium are advised not to lick their fingers.  Combines amusing demonstrations with talking to the camera by a wild-haired chemistry professor.  Part of a series called Author(s): No creator set

The Numeral Four

Excellent video for young learners about the number 4.  The words are big enough to be seen in a pre-school classroom. There is no sound--just text and images. Some of the words and images are advanced. (03:05)

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3.1 How do organisms take up iron?

Nearly all organisms are able to take up iron. However, only a handful of organisms have had their iron-uptake chemistry studied. The organism that has received most attention (other than human) is a single-cell, prokaryotic bacterium (found in the human large intestine and elsewhere), called Escherichia coli (abbreviated to E.coli), a high-resolution image of which is shown in Author(s): The Open University

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