Learning outcomes

After studying this course, you should be able to:

  • evaluate technical descriptions of communication protocols and demonstrate an understanding of their operation

  • describe the characteristics of circuit-switched and packet-switched networks, and of connectionless and connection-oriented modes in packet-switched networks

  • describe the role played by primitives in the OSI reference model

  • explain how ‘vertical’ and ‘horizontal’ com
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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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Lion Dance Video
Toot and Puddle have fun in a costume.
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3.4 The atomic force microscope

The most commonly used scanning probe microscope is the AFM – the atomic force microscope. It works in a way much more similar to the gramophone stylus, but instead of detecting the movement of the probe tip electromagnetically, it usually does so optically. As the probe tip is drawn across the sample, a laser beam is reflected off the cantilever on which the tip is mounted. A position-sensitive optical detector picks up the deflection of the beam, converting the angle of bending into a vol
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1.2.2 Choosing keywords

Keywords are significant words which define the subject you are looking for. The importance of keywords is illustrated by the fact that there is a whole industry around providing advice to companies on how to select keywords for their websites that are likely to make it to the top of results lists generated by search engines. We often choose keywords as part of an iterative process; usually if we don't hit on the right search terms straight off, most of us tweak them as we go along based on t
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Tasting menu: Audio highlights from the October 31st 2015 edition
This week: a new superpredator stalks North America, Japan’s Buddhist temples feel the squeeze and cashpoints get iris scanners
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Bell foundry DP130590

*

Whitechapel Bell Foundry, 32-34 Whitechapel Road, Tower Hamlets, London. Exterior showing bells in the courtyard. The foundry has been operating on these premises since 1739, casting both the Liberty Bell and Big Ben here.
© Historic England


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Nuclear Magnetic Resonance - Phenacetin
Andrew Hall compares the sounds of bells to the frequencies of chemicals captured by a Nuclear Magnetic Resonance spectrometer. http://blogs.bath.ac.uk/csct/2016/a-chemical-chorus/
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References

Ashcroft, S. and Timms, N. (1992) What Europe Thinks, Aldershot, Dartmouth.
Baker, S. (2001) ‘Environmental governance in the EU’ in Thompson, G. (ed.) Governing the European Economy, London, Sage/The Open University.
Bauer, M. and Bertin-Mourot, B. (1999) ‘National models for making and legitimating elites’, European Societies, vol.1, no.1, pp.9
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Postulate, Axiom, and Conjecture
Three words that are used seemingly interchangeably in Geometry are postulate, axiom, and conjecture. This video explains how each word is different and describes the subtle implications of using each word. These terms are especially important when working with Geometry proofs. (2:06)
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2.1 Introduction

There are many types of system – not just ICT systems. For example, we all have a nervous system and, as you are studying T175, you are in a higher education system. Our homes have plumbing systems and electrical systems.

Activity 1 (exploratory)

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Optimisation continue
Ce cours traite de l'optimisation continue, utilisée dans de très nombreux domaines des sciences de l'ingénieur. Les méthodes seront présentées tant sur le plan théorique qu'algorithmique : on abordera l'optimisation convexe, le cas des contraintes en égalité, des contraintes en inégalité, et la dualité. Une application en finance sera traitée (optimisation de portefeuille). Les outils de base de l'algèbre linéaire et de l'analyse numérique matricielle feront l'objet d'une intro
Author(s): Fabrice Rossi

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Document libre, dans le cadre de la licence Creative Commons (http://creativecommons.org/licenses/by-sa/2.0/fr/), citation de l'auteur obligatoire et autorisation de désassembler (Paternité-Partage

4.5 Structural explanations III: cultures

An early and influential body of research by the Chicago School of sociology explained criminal behaviour in terms of cultural structures. The school studied American male juvenile delinquents – or young offenders – in inter-war American cities (Shaw and McKay, 1969). Here we use the term culture to describe the web of meanings and values that individuals live their life within. (Recall from Section 1.1 how important every-day norms and conventions were in defining the meaning of c
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Brazilian serialities: imagining persons (24 May 2013)
In this Anthropology Departmental Seminar, Professor Joao de Pina-Cabral (University of Kent) discusses the creative use of personal names in Brazil.
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2.14 Analysis and Design of Feedback Control Systems (MIT)
This course develops the fundamentals of feedback control using linear transfer function system models. Topics covered include analysis in time and frequency domains; design in the s-plane (root locus) and in the frequency domain (loop shaping); describing functions for stability of certain non-linear systems; extension to state variable systems and multivariable control with observers; discrete and digital hybrid systems and use of z-plane design. Students will complete an extended design case
Author(s): Trumper, David

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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

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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Rights not set

Introduction

In this course you will be listening to the audio files: ‘Experiences of assessment’, where three people talk about assessment, with comments from a social worker and an occupational therapist.

The audio clip was recorded in 2000.

Participants in the audio clips:

  • Helen Robinson is the presenter;

  • Brian and Sylvia are a married couple who have experience of being assessed;

  • Anne
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How to Use Single Quotation Marks
Use single quotation marks any time that there is a quote within a quote. Put double quotations on the outside of a quote and single quotations on the inside of the quote. Get examples of when to use single quotation marks. (01:16)
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1.1 They think it's all over

They think it's all over … it is now!

(Kenneth Wolstenholme, 1966)

This is one of those iconic sporting media moments. It happened a long time ago, when Geoff Hurst's third goal in the dying seconds of extra time clinched England's 4–2 win over Germany in the 1966 football World Cup final. People who were not even born, let alone at Wembley or watching the game on television, still reco
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2.2 The organisation: loyalty cards

Many supermarkets and other firms (such as petrol companies and airlines) use loyalty cards: cards that offer a customer some form of incentive, such as a future discount or gift, to continue buying from that firm. For example, the British supermarket chain Tesco issues such cards. The holder of a loyalty card is regularly sent vouchers which give the holder discounts from their shopping bills and also vouchers which enable them to gain a discount on items that the supermarket wishes to promo
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