2009-05-16 Diversity and Stability The Case Of Hedges

For my recent birthday, I received a nice book called "Plantes des haies champêtres" (plant from the natural hedges) written by Christian Cogneaux. The book is a directory of the whole plant usually composing the natural hedges. On the form, the layout and typography of the book is clear and easy to read (the form is also important to render a book more interesting). The photos made by Bernard Gambier are really beautiful and tight to the spirit of the book. The content itself is useful (especially if you want to keep or create new natural hedges in your garden or land) and provide an exhaustive overview of the species available and common to natural hedges. But what's the relationship with diversity and stability in my blog title? good question. When reading the introduction about the importance of preserving natural hedges, I immediately thought about the scientific reason behind the conversation of natural hedges.

An natural hedge with its heterogeneity provide a nice ecological system to reach a "equilibrium stability". As demonstrated by the zoologist Charles Elton, a more diverse community provides more resilience while changes are introduced (like the introduction of new species or predators). Natural hedges provide a nice complex system with the abundance of species allowing to increase the general stability. If the topic of diversity-stability interests you, there is an excellent article from Nature on the diversity stability topic in Biology.

If you want to participate to biodiversity, when you are thinking of planting new hedges, consider to not use a single specie for your hedge. On one hand, you are introducing more risk to completely loose the hedge (e.g. when the hedge is sensible to a single predator). On the second hand, using various species help to increase biodiversity and protecting the surrounding nature. There is also nice effect of diverse natural edge : a natural edge with various species is nicer to look at than a monotonic green wall-like edge.

For the information security freaks reading my humble blog, there is the collateral discussion about diversity in information system as explained in the article : The Evolution of Security : What can nature tell us about how best to manage our risks?. But this is another story…

Tags: biodiversity ecology hedges diversity stability

On the cover, you can see a nice Lonicera (very common on natural hedges).

Syndicated 2009-05-16 14:32:21 from AdulauWikiDiary: RecentChanges

2008-10-19 Why Should Use Identica and not Twitter

#REDIRECT 2008-10-19 Why You Should Use Identica and not Twitter

Syndicated 2009-03-21 17:49:20 from AdulauWikiDiary: RecentChanges

2009-02-22 Society Economy and Metrics

When an idea is confronted over time, there is a high risk (but that's part of the game) of destruction. If the idea is coming more and more stronger over this confrontation process, there is the possibility of the something new to be created over time. The past few months, I read again André Gorz especially Écologica and L'immatériel : Connaissance, valeur et capital. Surprised by his consistency and ability to surround the important topics in the information society, there is a common recurring concept always popping up in his works : the metric and especially the lack of universal measure (called "étalon de mesure") in the information society. Gorz pointed the issue with the capital and the operation of the economy trying to capitalize on the "intangible capital". Reading his works right now is very interesting especially that he was really pointing the risks of creating economic bubble while trying to apply the capitalism techniques of tangible asset against the intangible.

Looking back, the idea of "universal metric" in the information society was somehow already hitting my mind with the following post and projects : Wiki Creativity Index, Innovation Metric (especially that the clumsy patent system is the only metric in use) and Creativity Metrics Are Needed. Project like Ohloh is already providing a specific answer to quantify the activity in the free software community. We are still far away(?) from an "universal metric" but when it will possible to link the respective activity of a human being with an exchangeable "money" (like bitcoin), we could have the possibility of growing without impacting the natural resources and funding the society with a real citizenship.

Tags: metrics creativity positivism freedom economy society

Syndicated 2009-02-22 15:15:20 from AdulauWikiDiary: RecentChanges

2009-01-02 Google Books And Europeana Are Killing Public Domain

More than two years ago, I made a blog entry about "Google Books Killing Public Domain" where Google is adding an additional clause to render public domain works into (again) the private circle by limiting the use to private use all public domain works scanned by Google.

Reading an Interview (sorry in French) of Jean-Noël Jeanneney, Mr Jeanneney is very proud of the Europeana digital library competing with Google Books. That's nice to see competition but is it really different from Google Books? No, Europeana is also transforming public domain works into proprietary works. Just have a look at Europeana's terms of service (copying section), they make the same mistake.

I had a lot of arguments especially during a conference held by the BNF about digital libraries, their arguments is about the cost of scanning or the "add of value" in scanning those public domains works. Sorry to say that but this is pure fiction (to be polite ;-), there is nothing like "adding value" while scanning an old public domain book. If you want to create wealth for the benefit of Society, please release public domain works as public domain. You'll see unexpected use (including commercial use) of those works and that will benefit everyone even the Libraries doing the scanning.

If you want to be ahead (I'm talking to Europeana or even Google) and help everyone, please leave the public domain works in the public domain.

Tags: google publicdomain archiving copyright europeana

Syndicated 2009-01-02 21:53:53 from AdulauWikiDiary: RecentChanges

2008-12-24 Oddmuse Wiki Using Git

If you are a frequent reader of my delicious feeds, you can see my addiction regarding wiki and git. But I never found a wiki similar to Oddmuse in terms of functionalities and dynamism relying on git. Before Christmas, I wanted to have something working… to post this blog entry in git. The process is very simple : oddmuse2git import the raw pages from Oddmuse into a the master branch of a local git repository. I'm using another branch local (that I merge/rebase regularly with master (while I'm doing edit via the HTTP)) to make local edit and pushing the update (a simple git-rev-list --reverse against the master) to the Oddmuse wiki. The two scripts (oddmuse2git git2oddmuse) are available. Ok it's quick-and-dirty(tm) but it works. There is space for improvements especially while getting the Oddmuse update using RSS to avoid fetching all the pages.

Tags: wiki oddmuse git

Syndicated 2008-12-24 21:17:19 (Updated 2008-12-25 10:04:36) from AdulauWikiDiary: RecentChanges