On what a system is, to Christopher Alexander:
When the elements of a set belong together because they co-operate or work together somehow, we call the set of elements a system.
For example, in Berkeley at the corner of Hearst and Euclid, there is a drugstore, and outside the drugstore a traffic light. In the entrance to the drugstore there is a newsrack where the day’s papers are displayed. When the light is red, people who are waiting to cross the street stand idly by the light; and since they have nothing to do, they look at the papers displayed on the newsrack which they can see from where they stand. Some of them just read the headlines, others actually buy a paper while they wait.
This effect makes the newsrack and the traffic light interactive; the newsrack, the newspapers on it, the money going from people’s pockets to the dime slot, the people who stop at the light and read papers, the traffic light, the electric impulses which make the lights change, and the sidewalk which the people stand on form a system – they all work together.
- Christopher Alexander, A city is not a tree, 1965.
(See also the article’s conclusion and publishing history)
Tags: socio-technical systems, systems
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Interesting term I came across today: hybrid forum, via a tweet by Fabien Gandon.
“Hybrid forums”, according to Michel Callon and colleagues are:
forums because they are open spaces where groups can come together to discuss technical options involving the collective, hybrid because the groups involved and the spokespersons claiming to represent them are heterogeneous, including experts, politicians, technicians, and laypersons who consider themselves involved. They are also hybrid because the questions and problems taken up are addressed at different levels in a variety of domains, from ethics to economic and including physiology, nuclear physics, and electromagnetism.
- Michel Callon, Pierre Lascoumes, and Yannick Barthe, from a chapter called “Hybrid Forums”, Chapter 1 in Acting in an Uncertain World: An Essay on Technical Democracy by Michel Callon, Pierre Lascoumes, and Yannick Barthe. translated by Graham Burchell, MIT Press 2009, First published by Editions du Seuil in France as Agir dans un monde incertain: Essai sur la democratie technique.
In their heterogeneity, there is a relation to the “wicked problem”- where “Stakeholders have radically different world views and different frames for understanding the problem.”.
In their openness and heterogeneity, there is also a relation to the open (peer) production community (around which I am currently framing my dissertation work).
Tags: forums, heterogeneity, hybrid forums, open production communities, peer production, wicked problems
Posted in argumentative discussions, PhD diary, social web | Comments (0)
A great image “Four types of evidence” appears in a recent paper on probabalistic argumentation schemes. The delineation of 4 types of evidence serves the larger goal of the paper — which is to describe how to combine evidence of different types.
- Four Types of Evidence, from Tang et al. ArgMAS2013
The four types of evidence depicted are:
- Consonant Evidence – each set is wholly contained in another (all sets can be arranged in a nested series of subsets)
- Consistent Evidence – have a common element (nonempty intersection of all sets)
- Disjoint Evidence – in which there is no overlap (pairwise disjoint intersection of sets)
- Arbitrary Evidence – where none of the three preceding situations holds (i.e. there is no consensus but some agreement)
Tags: argumentation, argumentation schemes, Dempster-Shafer theory, evidence, online argumentation, sensor fusion
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Argumentation analysis can be simplified by thinking about the patterns used.
But what are the key patterns? Here are two diagrams showing different views.
Rahwan suggests 5 common basic argument structures: single, linked, convergent, serial, and divergent.
Iyad Rahwan. Mass argumentation and the Semantic Web. 2008.
Meanwhile, Wei and Praken give 5 possible argumentative structures that have one or two inferences.
From Bin Wei and Henry Prakken. Defining the structure of arguments with AI models of argumentation.
Why 5 structures? Five connected structures emerge from having two types of inference — as unit I (single) and unit II (linked) inference. With two inferences of either type, we can make five patterns:
(1) unit I argument (single)
(2) unit II argument (linked)
(3) multiple unit I argument (serial)
(4) multiple unit II argument
(5) mixed argument
What is interesting is to look at the differences: Rahwen doesn’t cover (4) multiple unit II and (5) mixed arguments. Meanwhile, Wei and Prakken’s list doesn’t include Rahwen’s convergent & divergent argumentation.
So which are the key patterns?
Single and linked arguments are fundamental, and serial arguments are mathematically simple and Rahwen suggests that they are common in use.But the rest?
Convergent & divergent argumentation structures are both candidates: Wei and Prakken don’t cover these, I suspect, since each could be separated into two separate single arguments, which have the same premise (divergent) or conclusion (convergent). These structures can be important in practice: Convergent arguments give multiple reasons for coming to a conclusion — essential when no single reason suffices. The structure of divergent arguments seems to me to be most useful for showing contradictions in diverse conclusions, e.g. for reductio ad absurdum arguments; I’d love a real-world example of a divergent argument where keeping this structure is important.
Tags: argumentation, argumentation patterns, argumentation structure, convergent arguments, divergent arguments, linked arguments, serial arguments
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Jason Priem has a wonderful slidedeck on how to smoothly transition from today’s practices in scientific communication to the future. Here is my reading of the argument given in Jason’s slides:
Communicating science is a central and essential part of doing science, and we have always used the best technology available.
Yet currently, there are several problems with journals, the primary form of scholarly communication.
Journal publication is
- Hard to innovate
- Restrictive format: function follows form
- Inconsistent quality control
These problems are fixable, if we realize that journals serve four traditional functions:
By decoupling these functions, into an a la carte publishing menu, we can fix the scholarly communication system. Decoupled scholarly outlets already exist. Jason mentions some outlets (I would say these mainly serve registration functions, maybe also dissemination ones):
- Math Overflow
- Faculty of 1000 Research
- the blag-o-sphere
Jason doesn’t mention here — but we could add to this list — systems for data publishing, e-science workflow, and open notebook science; these may fulfil registration and archiving functions. Also, among existing archiving systems, we could add the journal archiving functions of LOCKSS is the main player I’m familiar with.
To help with the certification functions, we have altmetrics tools like Impact Story (Jason’s Sloan Founded project with Heather Piwowar).
Jason’s argument well worth reading in full; it’s a well-articulated argument for decoupling journal functions, with some detailed descriptions of altmetrics. The core argument is very solid, and of wide interest: Unlike previous articulations for “pre-publication peer review”, this argument will make sense to everyone who believes in big data, I think. There are other formats: video of the talk and a draft article called “Decoupling the scholarly journal”.
Briefly noted in some of my earlier tweets.
Tags: altmetrics, decoupled journal, journal publishing, prepublication peer review
Posted in future of publishing, information ecosystem, scholarly communication | Comments (0)
Last March I gave a reading group talk about knowledge representations of online disputes:
Titled “Turning social disputes into knowledge representations”, the talk was based primarily on two papers:
- Toni and Torroni. Bottom-up Argumentation. In: First International Workshop on the Theory and Applications of Formal Argumentation 2011 (TAFA), 16-22 July, 2011, Barcelona, Spain. http://www.doc.ic.ac.uk/~ft/PAPERS/tafaPT.pdf
- Benn, Buckingham Shum, Domingue, and Mancini. Ontological Foundations for Scholarly Debate Mapping Technology. In: 2nd International Conference on Computational Models of Argument (COMMA ’08), 28-30 May, 2008, Toulouse, France. http://oro.open.ac.uk/11939/
Online argumentation, and particularly knowledge representation from argumentation, is the overarching theme of my dissertation at DERI and as I get together the overall argument, I’ve been looking through my old slidedecks. My previous reading group talk, from November 2011, was about Using Controlled Natural Language and First Order Logic to improve e-consultation discussion forums, based on several papers by Adam Wyner and his colleagues; more recently Adam and I have started a fruitful collaboration, funded in part by the COST action on argumentation and a Short-Term Travel Fellowship from Science Foundation Ireland.
Tags: COMMA 2008, knowledge representation, online argumentation, reading group, TAFA 2011
Posted in argumentative discussions, PhD diary, social semantic web | Comments (0)
Converting temperatures in your head is a good trick for Americans living abroad.
So here’s the trick. You memorise the following correspondences:
0 °C = 32 °F
10 °C = 50 °F
20 °C = 68 °F
30 °C = 86 °F
Then, to convert any temperature that is near these, approximate 1 °C = 2 °F. This will allow you to convert almost any naturally occurring outdoor temperature in the UK in either direction to within 1° accuracy.
Let’s try it. As I write the current temperature in Edinburgh is 14 °C. This is 10 °C plus 4° extra. From memory convert the 10 °C to 50 °F. Then convert 4 °C extra to 8 °F extra and add it back on. This gives you 14°C = 58°F. This is not exact, but close enough that you know to wear a jumper. The exact formula is
14 * 9 / 5 + 32 = 57 F
Good luck doing that in your head.
from Charles Sutton’s Converting Fahrenheit into Celsius.
A jumper, for Americans, is “A pullover sweater.”
Tags: Celsius, Fahrenheit, jumpers, piecewise linear approximations, temperature
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I’m still looking for real-time collaboration tools for LaTeX. I need to try shareLaTeX again. Sadly, LaTeX-lab (which layers ontop of Google Docs) is only designed for a single editor at a time (kind of defeating the purpose). Apparently, ScribTeX (discovered via pinboard search) is popular (and there’s also verbosus) — and sounds useful.
One of the sticking points of using Google Docs (which is useful at some points of the editing) was its use of smartquotes. That, at least is avoidable: Tools -> Preferences gives the option to disable smart quotes and automatic substitution.
Google Docs preferences - disable smart quotes
Tags: Google Docs, LaTeX, smartquotes, Unicode, workflow
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James Malone reflects on a panel discussion on evaluation and reuse of ontologies. He wants there to be a “a formal, objective and quantifiable process” for “making public judgements on ontologies”. Towards that, he suggests that we need:
- A formal set of engineering principles for systematic, disciplined, quantifiable approach to the design, development, operation, and maintenance of ontologies
- The use of test driven development, in particular using sets of (if appropriate, user collected) competency questions which an ontology guarantees to answer, with examples of those answers – think of this as similar to unit testing
- Cost benefit analysis for adopting frameworks such as upper ontologies, this includes aspects such as cost of training for use in development, cost to end users in understanding ontologies built using such frameworks, cost benefits measured as per metrics such as those above (e.g. answering competency questions) and risk of adoption (such as significant changes or longer term support).
- James Malone, in Why choosing ontologies should not be like choosing Pepsi or Coke, about his International Conference on Biomedical Ontology panel ‘How to deal with sectarianism in biomedical ontology.
Tags: International Conference on Biomedical Ontology, ontology engineering, ontology evaluation, ontology reuse
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For about a year I’ve been collecting email signature lines. After receiving an email purporting to be “Sent from my rotary phone” I thought it was time to share.
- Touched, not typed
- Sent from my $DEVICENAME
- Consider any misspellings my gift to you
- Typed with thumbs
- Sent with mobile solution
- Sent from a mobile operating system. Which one isn’t of any importance to you, the receiver. However, if you feel that knowing this detail would affect positively your reading of this email you can, of course, ask me.
- Sent from my smartphone platform of choice….hint not a fruit
- I prefer robots to fruit.
- Fruits are for fruitcakes, Robots are for emailing.
- bots best for smart phones
- Smart fruit is an oxymoron
- Sent via a really tiny keyboard
- Sent from a mobile device. Erroneous words are a feature, not a typo.
- Sent from mobile; pls excuse typos
- $DEVICENAME = specific mobile operating system of choice
- Sent from my stationary operating system of choice.
- Erroneous words are a feature, not a typo.
- (Short, curt and ill-formed message sent from my portable telephone machine.)
- > Sent wirelessly from my BlackBerry device on the Bell network.
> Envoyé sans fil par mon terminal mobile BlackBerry sur le réseau de Bell.
- *Sent from a mobile phone – please excuse the brevity of the message
- via small communication device/pardon random autocorrects and fat finger typos.
- Warning: I either dictated this to my device, or I typed it clumsily. Expect typos and weirdness.
- Sent from a mobile device. Excuse brevity and typos.
- Typed by thumbs and sent by my Verizon Wireless gadget
- Sent from a mobile device. Please excuse brevity and tpyos.
- Sent from my Verizon Wireless 4G LTE smartphone
- Sent from tiny touchscreen gizmo, excuse any auto correct nonsense that slips in…
- Sent from my rotary phone
- Sent with my thumbs (Thanks to Andy Powell.)
- sent from my shoe (Thanks to Larry Hynes.)
- Sent while walking into stuff(Thanks to Ryan Sarver (via Laura Dragan and Tim O’Reilly; used by David Cohen)
Previously discussed on Twitter (thanks to David Crowley and Becky Yoose for spreading my question). Apparently desktop users want forgiveness too.
Tags: email, mobile, signature lines, typos
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