5.1 Phase and phase difference

In this section I am considering sine waves that have the same frequency, but are out of step with each other.

Suppose we have two detectors at fixed points, A and B. At this moment in time A is in a high pressure region and B in a low pressure region. If we were to look again shortly later B would now in a high pressure region and A in a low pressure region. The pressures at A and B would be out of step with each other. The pressure variation at B is not in phase with that at A. The ex
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1 Aims

The aims of this section are to:

  • help you clarify your own ideas of what mathematics is;

  • give you experience of reading different types of written mathematics;

  • give you an initial feel of how a mathematician views the world.

You have chosen to study a course entitled ‘Mathematics everywhere’, but what exactly is mathematics? It sounds a simple enough question but, in fact, mathematics is not easy
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1.060 Engineering Mechanics II (MIT)
This subject provides an introduction to fluid mechanics. Students are introduced to and become familiar with all relevant physical properties and fundamental laws governing the behavior of fluids and learn how to solve a variety of problems of interest to civil and environmental engineers. While there is a chance to put skills from calculus and differential equations to use in this subject, the emphasis is on physical understanding of why a fluid behaves the way it does. The aim is to make the
Author(s): Gonzalez-Rodriguez, David,Madsen, Ole

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References

Cooper, Lord (1991) Scottish Legal Tradition, Edinburgh, Saltire Society.

Robertson, G. (1998) The Justice Game, London, Chatto & Windus.

Scottish Case Digests ‘Adams and others v The Scottish Ministers’, hearing date 28 May 2004 taken from LexisNexis Legal Database.

Walker, D. (1981) The Scottish Legal System, 5th edn, Edinburgh, W Green & Son Ltd.


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Fundamentals of accounting
Learn about the essential numerical and double-entry skills required for accounting. This free course, Fundamentals of accounting, will explain the fundamental purpose and role of accounting as well as the double-entry rules that are the foundation of all financial records and reports in any modern business. First published on Tue, 24 Apr 2018 as Author(s): Creator not set

1.6 Obesity treatment

Obesity treatment is only successful if weight is reduced and maintained to within a desired range. There are three approaches to obesity treatment: changing behaviour and diet is the most common approach although drugs and surgery can be used in some severe cases of obesity.

Behaviour and diet: it is important to be realistic about an obese patient's target weight as many patients have over-ambitious targets that they are unlikely to achieve. A severely obese patient probably ca
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6.1 Firing-rate hypothesis

Information about stimulus intensity is encoded in two ways: the firing rates of neurons and the number of active neurons.

Intensity is assumed to be encoded by an increase in discharge rate of action potentials within the auditory system. As the stimulus gets more intense, the basilar membrane vibrates at a greater amplitude causing the membrane potential of activated hair cells to be more depolarised and this causes the nerve fibres that synapse onto the hair cells to fire at a greate
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Waste Management
How much do you think about what you throw away? A waste management cycle is essential for a sustainable future. This album considers the policy and legislation that is driving waste management processes across the EU. By modelling the overall environmental impacts of solid waste disposal methods, the UK government has now created a hierarchy of waste and local management strategies. The 12 video tracks in this album offer an in depth look at each of these processes, concentrating on waste coll
Author(s): The iTunes U team

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11.601 Introduction to Environmental Policy and Planning (MIT)
This course is the first subject in the Environmental Policy and Planning sequence. It reviews philosophical debates including growth vs. deep ecology, "command-and-control" vs. market-oriented approaches to regulation, and the importance of expertise vs. indigenous knowledge. Its emphasis is placed on environmental planning techniques and strategies. Related topics include the management of sustainability, the politics of ecosystem management, environmental governance and the changing
Author(s): Susskind, Lawrence

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1.3.3 The role of clouds

We have already identified one role that clouds play in the Earth's climate: they are highly reflective (Section 1.2.1). At any given time, about half of our planet is covered by clouds; the sunlight they reflect back to space accounts for about 55% of the total planetary albedo. However, clouds also absorb and re-emit outgoing longwave radiatio
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Upton Sinclair, Muckrakers, and the Progressive Era
This is a two hour video in two parts about Upton Sinclair. Interviews with experts about the history of the Progressive Era, Industrial
Revolution, and labor practices are discussed through the
Writings of Upton Sinclair's The Jungle. The novel's chief goal was to expose abusive labor conditions in the stockyards. However, in addition to doing this, the work received most of its notoriety from its descriptions of the filth of the processing plants and the ingredients of its proces

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5.2 Blair's babe

The ESRC report demonstrated the high awareness amongst the public of the Leo Blair issue, in spite of it not being the most prominent aspect of the media coverage. In December 2001, during Prime Minister's Questions in the House of Commons, Tony Blair was asked whether his infant son had been immunised with MMR. Mr Blair declined to answer on the basis that it was a private family matter. The perception in the media was that if Leo had been immunised, Mr Blair would have been happy to say so
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1.782 Environmental Engineering Masters of Engineering Project (MIT)
This class is one of the core requirements for the Environmental Masters of Engineering program, in conjunction with 1.133 Masters of Engineering Concepts of Engineering Practice. It is designed to teach about environmental engineering through the use of case studies, computer software tools, and seminars from industrial experts. Case studies provide the basis for group projects as well as individual theses. Recent 1.782 projects include the MMR Superfund site on Cape Cod, appropriate wastewater
Author(s): Adams, Eric,Shanahan, Peter,Murcott, Susan

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The Indefinite Pronouns Song
A catchy little tune that sings examples of indefinite pronouns.  A few examples are somebody, nobody, everybody, anybody, etc. (00:55)
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2.1 Tables

Experiments or surveys usually generate a lot of information from which it is possible to draw conclusions. Such information is called data. Data are often presented in newspapers or books.

One convenient way to present data is in a table. For instance, the nutrition panel on the back of a food packet:

Nutrition Information


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biosights: September 1, 2014 - Deploying exosomes in a battle of the sexes
By: JCB The paired accessory glands of male Drosophila secrete multiple signaling factors into the seminal fluid that promote reproductive success by altering the recipient female's physiology and behavior. Corrigan et al. reveal that the secondary cells of accessory glands secrete membrane-bound exosomes in a BMP-dependent manner that, after being transferred into the female reproductive tract, inhibit the female's inclination to re-mate with other male flies. This biosights episode presents th
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Woman stoned to death in Islamic State-controlled Syrian territory - amvid
Amateur video posted online purports to show a woman who has been later stoned to death for adultery in Islamic State-controlled area of Hama in Syria. Deborah Lutterbeck reports. Subscribe: http://smarturl.it/reuterssubscribe More updates and breaking news: http://smarturl.it/BreakingNews Reuters tells the world's stories like no one else. As the largest international multimedia news provider, Reuters provides coverage around the globe and across topics including business, financial, national
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1 Springs

We have seen that where precipitation reaches the ground, some runs off the surface into streams and rivers and some of it infiltrates, passing through the soil. Water that reaches the water table to become groundwater may eventually re-emerge at the surface as springs where the water table intersects the surface. Almost all streams and rivers have springs or seepages as their ultimate source, or are fed by them at various points along their courses.

Artesian springs that are associated
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22.01 Introduction to Ionizing Radiation (MIT)
This course provides an introduction to the basic properties of ionizing radiations and their uses in medicine, industry, science, and environmental studies. We will discuss natural and man-made radiation sources, energy deposition and dose calculations, and various physical, chemical, and biological processes and effects of radiation, with examples of their uses, and principles of radiation protection.
Author(s): Coderre, Jeffrey

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1.2.1 Try some yourself

1 A friend is painting the inside walls of a garage. So far she has used a 2 litre tin of emulsion paint and covered an area of 9 m2. She needs some more paint. How much more would you advise her to purchase if she intends to pa
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