The Macro & Micro of 3D-Printing

I noticed two articles today that are kind of linked in my mind. The first article if from inhabitat (“3-D Printer Creates Entire Buildings From Solid Rock“) is about what is basically a rapid prototyping machine for large stuff, like sculptures or possibly even buildings. This 3D Printer is built by Enrico Dini and basically  uses a print head moving about on what boils down to a scaled up version of a rep-rap style gantry system to precisely spray a magnesium glue over a sand substrate to essentially create rock. When I saw this I immediately began thinking about how a comprehensive pattern language for buildings, design software and A.I., and a building scale scaffolding/gantry system could lead to automated building construction. Assemble your scaffolding over the site, much like the protective scaffolding systems used to protect houses during re-roofing, add on the required print-heads, I am also considering a head for blown insulation to fill cavities purposefully left in exterior and selected interior walls, then just let the system run for 24 hours a day. There are other things to consider, like electrics and plumbing, but I wonder to what degree routing spaces could be left by the construction head, or whether a separate head could be developed to lay cabling and flexible piping and hosing from various reels. Maybe this is quite different to the way that we currently build houses in the U.K. but it is not so far fetched to imagine that there are different way to do so which are just as good as the current approach.

Considering this lead me to another article about researchers at M.I.T. who are developing self assembling computer chips (described in this Nature paper: doi:10.1038/nnano.2010.30). This is the important next step that we need at the other end of the 3D printing scale, from the macro-scale of constructing buildings to the micro-scale of constructing small electrical devices. Rapid-prototyping systems still need people to create the electronics to fit into the shells created by the printer. For a few years we have been pinning our hopes on the idea of printers that lay down conductive paths to form electrical circuits but we still needed the integrated circuits that the conductive paths joined, now we have an approach that might lead to hardware that can create the fully integrated electrical device, shell + circuit + Chips & I.C.

It looks like the future might be more of the same in some respects – everything gets automated. For the moment though, even with intelligent software to help manage the complexity of the task, we still need people to design the aesthetic aspects of products, whether they be houses or the next generation of MP3 player.

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Power Down Weekend: Results

Well the results of the power down weekend that I posted about before are in and it is the Queen Mother Building that has won by a significant margin. The results are available on the Estates & Buildings page describing the endeavour and are republished here.

College Building Weekend Average use (kWh) Weekend 4th- 7th Dec (kWh) % Savings
Life Sciences Wellcome Trust Building 22,900 21,240 7.25%
CASE Queen Mother Building 3,562 3,206 9.99%
Central Services Dalhousie 4,876 4,732 2.95%
CASS Carnegie Building 925 865 6.49%
CDMN Airlie East 378 365 3.44%

Considering the technology-centric activities of the QMB, it is gratifying that we still managed to significantly reduce our power consumption. That said though, I think that in the case of the QMB we are nearing our base-load for the building and to further reduce our power consumption beyond this point would begin to impact those activities that are the raison detre for the QMB in the first place.

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Power Down Weekend

powercord1I am not sure of the true value of this experiment but it piques my interest nonetheless. Over the weekend of the 4th-7th December users of a number of buildings on the Dundee University campus are being asked to turn off non-essential equipment so that the energy consumption of a powered down building over a weekend can be compared to a number of average readings for those same buildings over previous weekends.

It will be interesting to see what savings, if any, there are from the Queen Mother Building (QMB) as there has been a constant drive over the last few years to reduce energy consumption in the building where possible. Machines in student labs are automatically powered down overnight and weekends because of decreased usage compared with daytime during the working week. For a computing school we already have the bare minimum of hardware in the server room (which could and should be termed essential) compared with many of the computing departments at other universities that I have visited. Many of the desktop machines in research areas are shut down by their users at the end of every working day, I think partly due to many of those machines being windows boxes and hence their users being less accustomed to logging in remotely. In this instance I think that it is the *nix users who might be less environmentally friendly than the windows users. There has also been a concerted effort to replace all of the CRT screens with LCDs (although again I keep an old Iyama connected to my servers because it just works with everything whereas some LCDs can be a little pernickety with more exotic hardware in my experience). Lights within the building are already on automated systems that turn them off automatically when a certain duration of non-movement is detected — pity the Ph.D student working late at night who has to lean away from their desk periodically and wave their arms to get the lights to come back on after they automatically shut off.

To be honest I think that very little, in the way of little things like switching off IT equipment, can be done in the QMB to further reduce power consumption, although the results of this experiment may yet surprise me.

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Living Buildings

Baubotanik-largeHot on the heels of a recent post about living bridges comes this story of architects in Germany who are looking at the use of plants as support structures in buildings so that houses and cities can grow “into the sky”. Their website discusses a number of projects involving using plants, often Willow trees, to build living architecture. Whereas the living bridges used the trunks of other trees to provide initial scaffolding, the Baubotanik group use steel scaffolding to provide the initial load bearing function which is replaced over time by the strength of the plant material as it matures. More photographs and commentary can be found in this german information centre article.

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Institute for Computational Sustainability

leavesWhilst away in the states earlier this summer I met a representative from the nascent Institute for computational sustainability (ICS). Computational sustainability is defined as an interdisciplinary field that aims to apply techniques from computer science, information science, operations research, applied mathematics, and statistics for balancing environmental, economic, and societal needs for sustainable development, with a focus on developing computational and mathematical models and methods for decision making concerning the management and allocation of resources in order to help solve some of the most challenging problems related to sustainability.

This dovetails quite nicely with some of my interests in the area which are in the application of computer science techniques, such as argumentation, defeasible logics, intelligent agents and multiagent systems, and ludic theory, to the problems experienced when attempting to balance societal and environmental needs with the aim of fostering a sustainable world.

There have been two events this year on the topic of computational sustainability, a workshop (CROCS-09) and a conference (CompSust09) and it looks as though there might be a burgeoning sustainability society starting up at Dundee with the aim of fostering interdisciplinary research in the field. We shall have to see.

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  • Cult of the Green Man gathers news and ideas about green issues, green culture, sustainability, ecology, permaculture, and general veriditas related miscellany.

    The aim is to keep track of my reading and musing on topics related permaculture and sustainability which are increasingly of research interest to me as a domain of application for my skills in argumentation theory, agent software, and defeasible automated reasoning.

    I also love the outdoors, from walking, camping, hunting, fishing, and foraging, to gardening, keeping chucks and Apiary, right through to researching the myths of the green that underpin many of the folk tales told about the British landscape. Hopefully all of these aspects will get some attention on these pages in the future…

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