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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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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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Pacocinando: Pan con Tomate
Paco show us how to cook 'pan con tomate', in his new web show: 'PACOCINANDO'
Author(s): learn-spanihs@lingus.tv (LingusTV) (Las Buenas Len

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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
Author(s): The Open University

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STS-133 Daily Mission Recap - Flight Day 5
A video recap of flight day 5 of the STS-133 mission of space shuttle Discovery to the International Space Station.
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Conclusion

This free course provided an introduction to studying Environment & Development. It took you through a series of exercises designed to develop your approach to study and learning at a distance, and helped to improve your confidence as an independent learner.


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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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1.2.3 The effect of death on life

In some cultures, or groups within a culture, there is an attempt to integrate the fact of mortality into the centre of living so that members are actively encouraged to see death as normal and to face the fact that each of us will die. In others there is a tendency to combat or deny the fact of death, to the extent that life becomes an exercise in keeping thoughts of death at bay.

Yet it remains true that some ways of life and systems of belief do actively prepare people to acknowledge
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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

Surround Sound Simulation
Chris Stevenson, Adam Samaniego, Erin Lytle, Nnena Okeke
Generating the illusion of directional sound using calcu

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Discovery Kids - Doki Descubre - Los Planetas
This one-minute animated Spanish video offers information to younger learners about the planets in our Solar System. (01:00)
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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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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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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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2.1 Numbers

The supermarket example discussed in Section 1 involves various forms of data that a computer may need to handle. Some of these, such as numbers and characters, are simple but fundamental. Other forms of data, such as sequences, involve more complicated structure. In this section, we will introduce sets, which are a variety of data collection that is different from sequences. But first we will look more carefully at numbers and characters.

When developing software we need to dist
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8 CASE tools

Computer Assisted Software Engineering (CASE) tools were developed to support the professional system developer and improve their productivity in the complex task of developing large information systems.

The benefits that may accrue from the use of such tools are many. From a developer’s viewpoint, they provide support for modelling aspects of the system using a variety of notations and techniques: from diagrams to mathematics and text, producing prototype code, and even verif
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Does Connectivity Help — or Hurt — the Doctor-Patient Relationship?
E-visits to doctors were supposed to make it easier for physicians to treat patients and create better health outcomes. But it has not turned out that way.
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Repercussions of the Sub Prime Crisis
Viral Acharya, Professor of Finance, talks about the repercussions of the sub prime crisis.

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