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4.1 The piezoelectric effect

The phenomenon of piezoelectricity was first predicted and demonstrated in the late nineteenth century using naturally occurring materials. It has a vast number of applications, ranging from spark ignitors to inkjet printers. It is also utilised in timing circuits, where an oscillating electric field is used to make a quartz crystal resonate at its natural frequency. In MEMS, the effect is used to generate small-scale movements in a range of devices known as micro-actuators.

The effect
Author(s): The Open University

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Othello and apartheid
Can a play written in the seventeenth century protest against contemporary issues? Is it possible to use a Shakespearian tragedy draw attention to political injustice? Apartheid was a system of enforced legal racial segregation in South Africa that was imposed on the country's majority non white inhabitants by the minority white population. In 1988 actress and director Janet Suzman took the decision to defy the racist apartheid regime by staging Othello in Johannesburg with a mixed cast of both
Author(s): The iTunes U team

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What chance for peace in Sri Lanka?
The recent resumption of violence in Sri Lanka between the Tamil Tigers and Government forces has set back hopes that a peaceful settlement could be established in this long running conflict. Miranda Alison of Warwick's Department of Politics and International Studies provides an insight into the history of the conflict and examines whether a resolution is likely in the near future. Length: 23 minutes
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2 Community

As you've just seen, ‘community’, an ever present word, evokes some contrasting meanings. It has been described as a ‘keyword’, that is, a word which has its own particular history but which also plays a significant role in putting across different meanings. Identifying a keyword is to go further than just giving a dictionary definition because:

Keywords have been more than ways of seeing: they have been influe
Author(s): The Open University

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12.333 Atmospheric and Ocean Circulations (MIT)
In this course, we will look at many important aspects of the circulation of the atmosphere and ocean, from length scales of meters to thousands of km and time scales ranging from seconds to years. We will assume familiarity with concepts covered in course 12.003 (Physics of the Fluid Earth). In the early stages of the present course, we will make somewhat greater use of math than did 12.003, but the math we will use is no more than that encountered in elementary electromagnetic field theor
Author(s): Plumb, R. Alan

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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

Alumni Day 2015 - Rosetta, Philae and Beyond: Decoding Ancient Texts in the Digital Age
Rosetta, Philae and Beyond: Decoding Ancient Texts in the Digital Age. Alumni Day Sept 2015 - Rosetta, Philae and Beyond: Decoding Ancient Texts in the Digital Age.
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Will Pension Funds Go Green?
The UN’s international agreement to limit greenhouse gas emissions could change the way pension funds invest our money.
Author(s): Eduardo Rodriguez-Montemayor, Economics Department

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Learning outcomes

By the end of this unit you should be able to:

  • explore the relationship between sport and the media and understand that this is a social relationship;

  • understand how sport is part of wider cultural relations and, especially of popular culture;

  • look at how the media create sporting heroes through the stories they tell.


Author(s): The Open University

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News #196 - Your New Languages & Special Gift for Helping Us Reach 34 Languages!
Last time, you got the new Daily Dose App so you can learn your language in minutes a day. There’s more! This time, we’re celebrating 34 languages – that’s right, we have 3 brand new languages for 2016 – and have a special gift for you for helping us grow! Celebrate With Us! Click Here to [...]
Author(s): SpanishPod101.com

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7.4 Faraday depolarization

Radiation of wavelength λ which starts off linearly polarized in a particular direction and travels through a plasma has its direction of polarization rotated by an angle

where ne is the electron density, B| | is
Author(s): The Open University

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"The Talibanization of South Asia: Can it Be Stopped?"
wbh logoA talk by Pervez Hoodbhoy, Department of Physics, Quaid-e-Azama University. Dr. Hoodbhoy received his bachelor's degrees in electrical engineering and mathematics, master's in solid state physics, and Ph.D in nuclear physics, all from the Massachusetts Institute of Technology. He has been a faculty member at the Department of Physics, Quaid-e-Azam University, Islamabad since 1973. He is cha
Author(s): The Center for International Studies at the Univer

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3.1.1 The cause

A small digression will be made here to question the use of the word ‘cause’ and to reflect on the view expressed by Kletz (1988, p. 2). He argues that the word has an air of finality about it, and is concerned that finding the cause discourages further investigation. He cites an example that the cause of a pipe failure was corrosion – which suggests that we know why the failure occurred. He draws the analogy of the cause of a fall being gravity – suggesting that nothing more can be d
Author(s): The Open University

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Cragside 28280_043

*

Cragside Hall, Northumberland. National Trust property.
© Historic England Archive


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Part 4 - Chs 16-20 - The Awakening by Kate Chopin
Video 38:26-
Part 4 (Chapters 16-20). Classic Literature VideoBook with synchronized text, interactive transcript, and closed captions in multiple languages. Audio courtesy of Librivox. Read by Elizabeth Klett.

Playlist for The Awakening by Kate Chopin: http://www.youtube.com/playlist?list=PL40B84B017A86F6DC

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Cold War: Hungarian Revolution - part 3/5
1953 - 1961 Thaw is conceivable with Stalins death. Khrushchev outmaneuvers Malenkov for power and visits the West. Germans, Poles and Hungarians attempt to rise against Soviet rule. In 1956, an uprising in Hungary is ruthlessly crushed by Soviet tanks. The U.S., pledged to contain rather than overthrow communism, does nothing.
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References

Amin, A. (1999) ‘An institutional perspective on regional economic development’, International Journal of Urban and Regional Research, vol.23, no.2, pp.365–78.
Anderson, J. (1995) ‘The exaggerated death of the nation state’ in Anderson, J., Brook, C. and Cochrane, A. (eds) A Global World? Re-ordering Political Space, Oxford, Oxford University Press/The Open University.
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

La vida a través de la muerte: Los enterramientos en la Prehistoria reciente (2012)
La finalidad del proyecto era aproximar a los alumnos, de manera práctica y visual, la realidad social y económica de una comunidad prehistórica a través de su registro funerario. Se ha utilizado el recurso de la excavación arqueológica para un acercamiento al trabajo de campo, fase imprescindible e ineludible en la Prehistoria, ya que en este proceso se obtienen los únicos elementos de los que disponemos para conocer cómo y porqué enterraban así a sus congéneres, qué querían mostra
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Looking at an advertisement
After looking at an advertisement you learn: - to recognise the advertisers' aims and strategies; - to examine the terms of the publicity; - determine the target audience.
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Tracking Design Development through Decomposing Sketching Processes
We conducted a protocol study of the architectural sketching process. We decompose the process into process flows to explore the extent to which it expresses concept development in schematic and refined design phases. We track the development of design concepts in these phases by following the process flows of individual sketched strokes. We argue that each stroke drawn by the designer reveals a probability of an embedded concept, and that this concept is either promoted and propagated throughou
Author(s): Abdelmohsen, Sherif; Do, Ellen Yi-Luen

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