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Introduction

The scientific theory of plate tectonics suggests that at least some of these Arctic lands were once tropical. Since then the continents have moved and ice has changed the landscape. This unit will concentrate on evidence from the last 800,000 years using information collected from ice cores from Greenland and Antarctica, and will use this evidence to discuss current and possible future climate. The cores show that there have been nine periods in the recent past when large areas of the Earth
Author(s): The Open University

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6.6 The social construction of unknown risk

While some risks can be quantified, many are unknown. In the face of such uncertainty our approach to risk depends on fundamental assumptions about the way the world works which cannot be readily subject to empirical test. Different social groups have different approaches to uncertainty. Schwarz and Thompson (1990) characterise these in terms of what they describe as four myths of nature. Adams (1995) has conceptualised these in terms of a ball on a surface (
Author(s): The Open University

Reenactment of Colonists preparing to Tar and Feather a Tax Collector
Narrated reenactment of a mob confronting a tax collector over the tea tax. Video is available for download. Video quality is low, but the content is useful for showing the divisions created in the colonists before the revolution.

Author(s): No creator set

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HST.722J Brain Mechanisms for Hearing and Speech (MIT)
An advanced course covering anatomical, physiological, behavioral, and computational studies of the central nervous system relevant to speech and hearing. Students learn primarily by discussions of scientific papers on topics of current interest. Recent topics include cell types and neural circuits in the auditory brainstem, organization and processing in the auditory cortex, auditory reflexes and descending systems, functional imaging of the human auditory system, quantitative methods for relat
Author(s): Delgutte, Bertrand,Caplan, David N.,Guenther, Fran

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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

How's the Weather? (Easy Song)
Learn English weather Song - How's the weather? Oxford weather song in 3D Animation. For children, kids, kindergarten, and toddlers. (01:41)
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6.2 Authority and the variety of information sources

Technology has massively increased the number and variety of news sources that we have access to. We still have printed books, magazines and newspapers, while digital techniques have increased the number of broadcast radio and TV channels that we can get. On the Web we have access to online versions of many of these. This allows us access to media that previously would have been inaccessible.

With traditional news sources such as these, we have some understanding of the authority that t
Author(s): The Open University

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A look at the 20th century global droughts
Symposium on Data-Driven Approaches to Droughts (DDAD2011), June 21-22, 2011. Presentation by Vijay Singh from Texas A&M University on 20th century global droughts
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Fe, C 1.0 (wt%), hypereutectoid alloy
This secondary electron SEM image shows the cementite delineating prior austenite grain boundaries with a thin layer. The amount of proeutectoid phase is very low, with the majority of the area being taken by the pearlite eutectoid. Again each pearlite cell has a different orientation with the ferrite phase being selectively etched.
Author(s): DoITPoMS, University of Cambridge,Prof T W Clyne,

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http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

3.1 Agents of eutrophication

Light availability, water availability, temperature and the supply of plant nutrients are the four most important factors determining NPP. Altered availability of nutrients affects the rate of primary production in all ecosystems, which in turn changes the biomass and the species composition of communities.

Author(s): The Open University

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Human Biology Chapter 9.1: Introduction to the Cardiovascular System - Blood Vessels and Circulation
Willy Cushwa

Some Rights Reserved

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Great Minds of Business: Juliette Gordon (2:33)
This 2:35 long video is about  Juliette Gordon, who  formed the Girl Scouts of America, an organization dedicated to teaching women about the outdoors and preparing them for leadership later on in life. She was nearly deaf and this adds another dimension to showing the video.
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2011 Utzon Lecture Series: Peter Singer - Building Values
Prof Peter Singer (Princeton University) discusses the way in which our decisions about the kind of built environment we choose to create, and to live in, should take into account the interests of others, whether present or future, human or nonhuman. Australian-born philosopher Peter Singer is frequently acknowledged as a major force in modern bioethics. Peter has taught at the University of Oxford, La Trobe University and Monash University, as well as holding several visiting appointments. He
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6.2.3 Measurement of the angular distribution of the 3 K radiation

How are such angular distributions to be measured? One way, of course, is to take a radio telescope and swing it round the sky, taking readings in different directions. But as is clear from Figure 20(a), the atmosphere itself emits microwaves. There is therefore a grave danger, with this method, of picking up different contributions of atmospheric emissi
Author(s): The Open University

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5.5 5.5 Summary

  • The idea that regions are replacing nation states and that the future of Europe lies in a loose, decentralised federation of regions is a misinterpretation of recent and current developments.

  • This ‘small is beautiful’ ideology of a ‘Europe of the Regions’ can be rejected on empirical and normative grounds: it is still largely the existing member states which control EU integration and define the regions; the strongest regional threa
    Author(s): The Open University

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    Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 LicenceCopyright © 2

Bjorn Lomborg, "Prioritizing the World: How to spend $75 billion to do the Most Good"
Dr. Bjorn Lomborg is an academic and the author of the best-selling "The Skeptical Environmentalist" and "Cool It". He challenges mainstream concerns about the environment and points out that we need to focus attention on the smartest solutions first. He is an adjunct professor at the Copenhagen Business School, and director of the Copenhagen Consensus Center, which brings together many of the world's top economists, including seven Nobel Laureates, to set priorities for the world.
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2.3.2 Fast breeder reactors

If fast neutrons produced in the chain reactions are not moderated or absorbed, the rate of conversion of uranium-238 into plutonium-239 (Equation 3) can exceed the fission rate of plutonium-239. Reactors that use fast neutrons in this way are called fast breeder reactors.

Their main fuel is
Author(s): The Open University

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3.2 Uranium occurrence and ore deposits

In igneous rocks, uranium is more abundant in granites (~3.5 ppm) than in basalts (~1 ppm). The large size of the uranium atom prevents it from easily entering the structures of common rock-forming minerals, so it is an incompatible element that tends to remain in magmas until a late stage of crystallisation, when it enters minor minerals, or even the uranium oxide, uraninite (UO2). In suitable circumstances, following fractional crystallisation of uranium-rich granitic magm
Author(s): The Open University

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Effects of agricultural activities on insect species richness in the intensively cultivated landscap
As signatory of the Convention on Biological Diversity (CBD), China supports the 2010 Biodiversity Target to achieve a significant reduction in the current rate of biodiversity loss by the year 2010. This very ambitious goal must be seen against the background of a huge knowledge gap prevailing particularly with regard to patterns of insect diversity in space and time. Our collaborative research is trying to be instrumental in addressing the aforementioned knowledge gap by investigating how dif
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2.3.1 Patients and therapeutic responsibility

Activity 6: Therapeutic responsibility

0 hours 15 minutes

Based on your own experience, and using the evidence you have read about and heard, answer the following questions.


    Author(s): The Open University

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Virtual Maths, Shapes, Space and Measure, Demonstration of a Theodolite Survey in action
Using a theodolite to calculate the height of a building, demonstration 'in the field', includes interactive simulation tools and formulae
Author(s): Leeds Metropolitan University

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