6.4.2 Manufacturing the boat Filling the mould is a serious problem in injection moulding: the lower the MFI, the more difficult it is to push molten polymer down narrow tubes into a metal mould. The engineers at Rolinx, the trade moulders who initiated the thermoplastic project, were working at the limits of their machinery in moulding such large objects in one operation. In the event, they were forced to blend the low MFI copolymer grade with a higher MFI grade material (GY702M) in order to achieve their objective (
Learning outcomes After working through these materials you should be able to: describe and use a general classification of models; outline and discuss the process of systems modelling, where models are used as part of a systemic approach to a range of different situations; recognise that systems models may be used in different ways as part of a process for: improving understanding of a situation; identifying problems or formulating opportunities; supporting decision
Acknowledgements The following material is Proprietary and is used under licence: Various pages: Arup, O., material accessed in January 2002 and December 2000, from. Box 1: Inman, P. ‘Chaotic scheme that left families relying on food parcels’, The Guardian, 6 July 2005. © Guardian News and Media Ltd 2005. Box 2: ‘Fly-away drones put robot air force
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5.3 The rebound effect
Access to safe, clean and sustainable energy supplies is one of the greatest challenges facing humanity during the twenty-first century. This unit will survey the world’s present energy systems and their sustainability problems, together with some of the possible solutions to those problems and how these might emerge in practice.
2.2 Introduction to communication In Reading 2.1 I identified communication with others as being an important way in which humans learn. Unlike many other anim
4.3.1 ‘Players in the game’
Are you always the quiet one when it comes to group discussion? This unit will help you improve your working relationships with other people in groups of three or more. This unit also deals with project life cycles, project management and the role of the leader.
Stage 6: Debate on feasible and desirable changes The comparison undertaken in the previous stage can have two results. It can cause opinions to change on the problem situation and the issues arising from it. It can provide an agenda for change. In either case (though both may result), the objective of this stage is to debate, with all concerned, the changes proposed to ensure that they are both desirable and feasible. The aim is to arrive at consensus about the prop
References 4.4.1 The map isn't the territory The expression ‘the map isn't the territory’ draws attention to the difference between complex reality and simplified models of it. Normally, the territory is relatively stable and different maps are produced for different purposes; the territory shapes the maps, not vice versa. However, when the ‘territory’ comprises people who know that they – or their work activities – are being mapped, we find ourselves in a reflexive loop: the people can see how they and thei 4.2.1 Mapping who knows what continued One knowledge management initiative involves HP educators. Bruce Karney is a member of the infrastructure team for the Corporate Education organisation, part of HP's Personnel function. Karney estimates that there are more than 2,000 educators or trainers 2.5 Design implications The difficulties just described have very practical implications when it comes to designing technologies. Consider the following quotations: in selecting any representation we are in the very same act unavoidably making a set of decisions about how and what to see in the world … a knowledge representation is a set of ontological commitments. It is unavoidably so because of the inevitable imperfectio 2.4.1 From Heidegger to knowledge technologies Because each transformation from one ‘knowledge state’ to another (Figure 2) is an act of interpretation, there is no such thing as objective knowledge representation, or indeed objective classification or codification of any sort (in software or any other medium): there is always a viewpoint. This leads to the view that information and communication systems cannot be thought of as neutral; in their formal structures and operations they embody the goals and perspectives of their deve 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: References Activity 2 Click on 'View document' below to open and read the remainder of Audrey Linkman's article on 'Photography and art theory', then answer the questions. Form vs. Function Studying changing faces in the solar system How Much Water Do We Use? History of Economic Cycles (~1800-2000) Nobody's Perfect
Box 4.2 Knowledge sharing at Hewlett-Packard
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Students model and design the sound environment for a room. They analyze the sound performance of different materials that symbolize wallpaper, thick curtains, and sound-absorbing panels. Referring to the results of this analysis, they then design another room based on certain specifications and test their design.
In this middle-school level activity, students work as NASA scientists to make repeated observations of our Sun and the planets to determine their rotation rates. First, students create a playground model of rotation and create representative diagrams. Students then observe NASA images of sunspots to determine the rotation rate of our Sun. In the last phase, students download NASA movies from the Internet and measure rotation rates for objects in the solar system.
What is our water budget? Studying watersheds is one way to understand how much water we use.
Cycles Research is not a commonly studied subject and yet there are definite trends in history in the finding of information about cycles. Starting with Sir William Herschel there have been reports of various length cycles in many economic variables including commodity yields and prices, stock markets, business conditions, building activity, growth, price fluctuations and industrial production. The common cycles periods found over extended time periods are mentioned and the people that they are
This brief OLogy article helps kids understand that even Einstein made mistakes and didn't always finish everything he started. And, more importantly, that both his mistakes and his unfinished work also led to new ways of thinking. The article uses Einstein's Unified Field Theory as evidence of the value that can be found in imperfection.
