4.3 Dutch elm disease

Not all change is a direct result of human intervention. Sometimes changes can occur over which we have little control. One such example is the case of Dutch elm disease (so-called because most of the early studies of the disease were carried out in Holland, although the disease was first observed in France in 1918). The disease is caused by a fungus, Ceratocystis ulmi, that has the elm, Ulmus procera, as its only habitat and food source. Spores of the fungus are carried by the
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5.3 Global warming

Media attention has been such that it would be hard to have missed the fact that global warming is considered to be a ‘bad thing’. Why should this be so? What is so wrong with being a bit warmer? Anyway, is global warming really occurring and, if it is, what are the causal factors responsible for it?

Let us deal with this last question first. As we sit on a beach in summer, or in a sunny window seat in winter, we are aware of the Earth being warmed by the Sun. In fact the Earth is w
Author(s): The Open University

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Dr. Benjamin James '34 Named Honorary President of Dickinson
Dr. Benjamin James '34 was named honorary president of the day for June 14, 2014. The announcement was made by President Nancy A. Roseman during the 2014 Alumni Weekend festivities in which Dr. James celebrated his 80th class reunion.
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Exergaming and Older Adult Cognition: A Cluster Randomized Clinical Trial
By: gowanc
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Red Blood Cell Genotyping for Improved Medical Care
As medicine is advancing toward personalized (or precision) medicine, genetic testing is becoming more widely available and utilized. This trend is occurring in the field of blood transfusion as more laboratories begin to use commercially available molecular red cell testing platforms or refer certain testing to specialty laboratories. In this lecture, UW Assistant Professor Meghan Delaney describes the field molecular blood group typing and how it may lead to improved transfusion outcomes. Meg
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3.7.1 The machined-at-once tip and cantilever

Just as in conventional manufacturing, micro engineering is cheapest to do if as few different materials as possible are used and if the number of separate processes involved is minimised. Therefore, the idea of making the cantilever and the probe out of the same material and in the same process step is a very attractive one.

When silicon nitride is deposited onto a silicon surface, it produces a thin film that coats the whole of the material to an equal thickness. We have already seen
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6 Population growth

Earlier it was stated that three factors check population growth. These are predation, disease and insufficient food supply. For much of our history, our ancestors’ numbers were indeed limited by wars, disease and famine. The world population remained relatively stable until around 300 years ago. Then at the beginning of the 19th century (100 years after population growth started its geometric increase), the demographer Thomas Malthus predicted that population growth would outstrip food pro
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1.1 Why Glasgow?

Glasgow fulfilled our aims and was also an interesting case study having, arguably, been the most successful among British cities in developing/manufacturing a new identity in the ‘post-industrial’ era. Glasgow illustrates:

  • (a) power relations, reflected in:

    • constructed images – ‘Glasgow's miles better’ was a deliberate campaign to improve the image of Glasgow.

    • contested images –
      Author(s): The Open University

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How DNA is Translated into Proteins
Steven Telleen
By the end of this section, you will be able to: Explain how the genetic code stored within DNA determines the protein that will form Describe the process of […]

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Jimmy Martin - The Glenn Department of Civil Engineering
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Mobility on Demand

Conversation with Ryan Chin


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Applied social work practice
Making the move to residential care is one of the biggest decisions most people have to make in their lives. Focusing on staff and residents at Drummond Grange, the five video tracks in this album explore the organisational and personal aspects of the transition from independent living to residential care. It addresses the importance of selecting the right place for your needs and interests, finding ways to maintain contact with your family and adjusting to life in a new community. The material
Author(s): The iTunes U team

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Except for third party materials and otherwise stated (see http://www.open.ac.uk/conditions terms and conditions), this content is made available under a http://creativecommons.org/licenses/by-nc-sa/2

Slow Hindi – Microfinance (Part 6)
Hi, my name is Altergyan and today we have a slow Hindi lesson where I will read part of a wikipedia.org article to you slowly in Hindi.  This will give […]

Interfacial Control in OPV Devices
By: icamp2012school Dana Olson, National Renewable Energy Laboratory
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Professor Paul Salkovskis inaugural lecture: Understanding and treating anxiety
Professor Paul Salkovskis talks about understanding and treating anxiety.
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Introduction

Free trade or fair trade? This course 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 OpenLearn course provides a sample of Level 3 study in Author(s): The Open University

Introduction

In this unit you will have the opportunity to look at some of the constituent parts of the legal system in the UK. You will also consider how laws are made and who is responsible for enforcing them. Finally, you will have an opportunity to experiment with different ways of taking notes.

This unit is an adapted extract from Y166 Starting with Law, a course which is no longer taught by The Open University, but which was part of our Openings Programme which has been replaced by our
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Money talks: Should we tax sugar?
Governments around the world are taxing sugary drinks to help curb obesity, but do so-called 'sin taxes' on the likes of sugar or cigarettes work or has the nanny state gone rogue?
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Why things have got so much worse in Libya


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Korean History in English
Tourism encompasses broad range of spectrum of one country, and Tourism English mainly deals with culture and society and transfers them to the international tourists relating to cultural heritages and historical sites. As a professional on Tourism, historical knowledge of Korea is necessary to have national identity, read the current situation from the objective perspectives, and to understand trends of tourism. As a pre-requisite to understand the Korean culture and society as well as historic
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