6.1 Introduction So far, we have briefly introduced three key approaches to improving the sustainability of human energy use in the future. These are: (a) ‘cleaning-up’ fossil and nuclear technologies; (b) switching to renewable energy sources; (c) using energy more efficiently.
4.3 Dilemmas of climate change In Section 4.1, we looked at claims that climatic change thousands of years ago triggered the movement of people into the ocean, eventually leading to the settling of islands like Tuvalu. We have also seen that these islands only rose out of the ocean because of dynamic geological processes coupled with dramatic changes i
2.3 Communication techniques In the introduction to communication, I focused on the problems of getting a message through, but Author(s):
2.4.3 Polarization mode distortion Because light is an electromagnetic wave, it has a ‘state of polarization’, which, for light in single-mode fibre, is at right angles to the path of the fibre. If you've not encountered electromagnetic waves before, all you need to appreciate is that as light travels down the fibre the electromagnetic field has an orientation across the fibre (Author(s):
Activity answers
Study Note: As outlined in the text I have not provided answers to all Activities. This is for two reasons:
For some activities only you can devise the answer and any I gave would be distracting or unhelpful.
For others in-text answers are given.
6.1 Why is resonance important? This section aims to take you through some general ideas about vibrations, which will help you understand the principles behind the resonant behaviour of the AFM probe tip. Vibrations and oscillations crop up in many contexts. They can be modelled mathematically and form a general topic in mathematics about vibrations and oscillations in which the appropriate balances between forces and accelerations are formulated into differential equations. Students of physics and chemistry also get
3.5 Design of the bridge The design of the original structure was governed by applicable standards in 1926. The official inquiry found that the design and build fell within those limits, the most important being the allowable stress in the eye-bar chain of 345 MPa. The steel was to be made with a maximum elastic limit of 520 MPa, with a safety factor on the strength of the steel of 2.75. It was argued at the time that over 70 per cent of the load was from the self-weight of the structure. Other suspension bridges of
Learning outcomes By the end of this unit, you should be able to: understand the power of Maclean's poetry in its original Gaelic; give examples of how such poetry engages with historical and cultural change.
6 The Enlightenment on art, genius and the sublime Enlightenment ideas on art and the creative process were deeply influenced by the contemporary veneration for reason, empiricism and the classics. The business of the artist was conceived of as the imitation of nature, and as far as high art was concerned, this process of imitation should be informed by an intelligent grasp of the processes used to produce classical art. The ancients and their art were seen as models in the judicious selection of the most beautiful elements observed in nature
2.5 Why intentions? Most of the rest of Grice's paper is dedicated to spelling out a way of identifying the meaning of an individual utterance ‘on an occasion’ with the content of the utterer's intentions (Step One). The hard task he faces is to say what type of intention creates meaning. If someone shouts ‘I saw a film last night’ extremely loudly at their brother with the intention of making this brother fall off his bike, this ‘utterance’ (if that is the right word) does not thereby mean fall o
5.10 Features of French Romantic art and artists – exercise Try to list as many features as you can of French Romantic art and artists, as explored here. The Roma 1 Thugga The ancient city of Thugga is often known by its modern name, Dougga. In this unit we will be using the ancient name, Thugga. We are going to start by watching a video sequence, taking occasional notes: it should form about an hour of study time. The next section follows on from the video and introduces further evidence from Thugga. As you watch, think about how the city compares with other cities you have encountered. Look out for how the buildings and streets are arranged, for buildi 4.13.2 Example: an ‘intelligent’ email system Let us work through an email example of making a system ‘smarter’. We are all familiar with the standardised fields in an email system: From, To, Subject. The computer needs the To/From information, expressed in a standard format, to direct the message to its addressees and allow them to reply. It has no concept of who the sender and recipient are, or what the Subject field means. We can imagine simple knowledge-level email categories which add status information to t Learning outcomes After studying this unit you should: appraise your own skills in asking for contributions; identify ways of sustaining and developing donor involvement; make recommendations on how your organisation might most appropriately acknowledge contributions; contribute to thinking on the actual or potential role of ‘big gifts’ in your organisation's approach to fundraising; enhance your approach to legacy fundraising. 6.3 Identifying the critical path The critical path describes the sequence of tasks that would enable the project to be completed in the shortest possible time. It is based on the idea that some tasks must be completed before others can begin. A critical path diagram is a useful tool for scheduling the dependencies and controlling a project. In order to identify the critical path the length of time that each task will take must be calculated. Acknowledgements 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 Licence Grateful acknowledgement is made to the following sources for permission to reproduce material in this unit: The content ackno Modelling displacements and velocities 7.4.5 The conclusion Having come so far with your drafting, how will you bring it to a close? The conclusion should summarise the content of the main body of your assignment clearly and concisely. A final reference to the assignment title is often useful, emphasising to your tutor that you have indeed answered the question. Your concluding paragraph should not include anything new, though it may suggest what needs to be considered in the future. It should emphasise the key elements of your argument. W 9.5.2a Exchange feedback It is important to listen to, and take into account, the views and feelings of others. As a member of the group, you need to provide information on the extent to which your own work is meeting expected timescales and quality requirements: ask for and accept feedback from others on the way you are working and the quality of work being done. These skills take time to develop. Try to establish a climate for learning and developing your skills within the group so you can all actively benefit from 9.3.4 Plan work with others for achieving the quality outcomes required If you are doing this to complete a project as part of your study, check if the work is going to be assessed, and make sure you know how marks will be allocated and what criteria will be used. Take time to read carefully any instructions you have been given on group work for the activity – ask your tutor for advice if you are unsure about anything, particularly if this is the first time you have been set a group task. Check whether you will be assessed as a group or as individuals. Will the
Exercise 5
Answer
In this unit you will see first how to convert vectors from geometric form, in terms of a magnitude and direction, to component form, and then how conversion in the opposite sense is accomplished. The ability to convert between these different forms of a vector is useful in certain problems involving displacement and velocity, as shown in Section 2, in which you will also work with bearings.Author(s):
