ReseauPetri2
Réseaux de Petri Compléments Blocage Pré et post conditions Merci de corriger la figure ci-dessus en mettant la colonne t1 de la matrice des postconditions à 0. Remarque pertinente de Sébastien Faucou : ce RDP est impur (i.e. que pour p3 on a un arc vers et un arc venant de t2). Réseaux de Petri colorés Exclusion mutuelle, équité faible et équité forte H. Bibliographie, Vidal-Naquet, Choquet-Genier, Réseaux de Petri et systèmes parallèles, Armand Colin, 1992 Retour page précédente
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COMPARATIF Pearltrees Racine V1 & V2 ;-(
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The term “filter bubble” entered the public domain back in 2011when the internet activist Eli Pariser coined it to refer to the way recommendation engines shield people from certain aspects of the real world. Pariser used the example of two people who googled the term “BP”. One received links to investment news about BP while the other received links to the Deepwater Horizon oil spill, presumably as a result of some recommendation algorithm. This is an insidious problem. This is the filter bubble—being surrounded only by people you like and content that you agree with. And the danger is that it can polarise populations creating potentially harmful divisions in society. Today, Eduardo Graells-Garrido at the Universitat Pompeu Fabra in Barcelona as well as Mounia Lalmas and Daniel Quercia, both at Yahoo Labs, say they’ve hit on a way to burst the filter bubble. They found over 40,000 Twitter users who had expressed an opinion using the hashtags such as #pro-life and #pro-choice.
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My Critique (s243a) of Pearltree 2.0
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Web Resources To Improve Productivity
except that what curators wish to share is the curation not just an rss equivalent in a boîte by mojojuju Nov 24
As the first version wouldn't be available from 1ft of December on, I am leaving Pearltrees for ever. It will lost for me all of its efficience and innovation and would become a waste of time for me. I keep my account just to take back slowly my contents... by le_chene Nov 9
That's pretty bad, because then you even cannot export your stuff to another app / tool. by deuxpont Jun 2
version #1 crashes now on my pc. by healingshores Jun 2
ver #1 used to tell me when someone ad the same pearl as me in their pearltree... this has not happened in #2 yet... is this function there.. or is #2 about collecting a load of boxes noone else wants to sort through with no structure to it??? by healingshores Jun 1
@amsika Also, why were pearltrees replaced with collections? Did you need a more accurate name? by elliottbelardo2 Jun 1
Some features are still missing, and will be implemented soon.
As I said, this version 2.0 is a first version, and we'll improve it regularly, with 2.1, 2.2 etc...
For the moment we couldn't implement the export feature in Pearltrees 2, that's why you have to go back to PT1 to do it. But be sure that it will be done soon. by amsika May 31
Another really weird thing in the ver#2 version of Pearltrees: The export feature (some people tend to save their data from too aggressive upgrade activities) in the new Pearltrees version is missing.
I read the Pearltrees FAQ and learned that I can export my pearls to the HTML format (using them later as Firefox bookmarks for example - works actually; I tried it out) when I open the menu, then choose "settings" - but heck, there's no export feature at all.
So I had to get back to "Check back Pearltrees 1" and open the ver#1 settings menu to get that feature. So, amsika, please don't tell me that ver#2 became easier to use!
Again, I must say: P#1 thumbs up; P#2 thumbs down. by deuxpont May 31
Of course I am interested and like to know more about that. I'll stay in touch. by deuxpont May 31
@deuxponts
Just in complement about your "and the really need to enligten the danger of public sharing "pearled" web content".
I think HTML5 can help for to progress in that.
If you are interested for example (I dont know) in :
- what is really the cloud ?
- what is really DRM ?
Perhaps we can discuss about that after two or three weeks (or months), when enough people expressed their ideas about organization Pearltrees.
Keep in touch. by reel May 31
Hello,
Yes, the default format is now Pearltrees 2.0, so when you share your collections, they are seen in Pearltrees 2.0. It's very hard to maintain two different versions of Pearltrees. We manage to do it for the members who used to use Pearltrees 1, but we can't maintain it as a default version. Beside, the new format is even more easy to understand for everybody ;)
Unfortunately, it's also very complex to manage and maintain two different apps on the App Stores, that's why we can only have one app. by amsika May 31
Well, the copyright problem is not a ver#2 novelty. In ver#1 it was less obvious due to the restriction of collectable items of a single treebranch. So, in any case there's some need of customer information IMO.
Regarding the still available ver#1 view option, I have 2 problems: Pearltrees is designed to share content. So, if I want to share my ver#1 content, I also want my fellow pearlers to see a ver#1 tree structure, but they get collections without seeing my tree structure.
2nd problem: Guess I am using 40% of my work via smartphone. So I actually lost the special features of my mind-mapping work after getting the new app. The best thing that I can imagine would be to provide the fantastically working (guess HTML5 programmed) ver#1 app and the new ver#2 app. by deuxpont May 31
Thanks for your feedback deuxponts.
Mixing both versions would have made it more complicated for everybody and it wouldn't have help us going toward our initial gaol: democratizing organization and sharing of digital contents.
But please remember yet that if you're on a computer you can still access Pt1 from the left menu. Nothing is and will be lost.
I'm not sure to understand your point about privacy. Nothing has changed in term of privacy with the new format. Collections has always been public by default. by amsika May 31
Hi healingshores,
Creating ( and maintain) another entire site requires a lot of time and work. We' re just a small team of 15 people so we can't do this. But you can still use Pt 1 from the left menu of your account. by amsika May 31
Guess that's not easy. Ver #1 looks as if there's a lot of work and brainpower behind. But there is one thing that I don't understand: They could have left almost everything as it was (well, ver #2 actually has some improved capture/curatory features) and just add a new object class called "collection", having similar features like a "pearltree" plus the ability of containing more than a dozen items and using a grid structure instead of the bubble structure. If so, everybody was able to build ver#2-like collection "trees" or, alternatively ver#1-like trees containing collections as well, plus not leaving a lot of disappointed uses with ruined ver#1-pearltrees.
There's a second problem with ver#2: The new concept is designed to share and extend non-professional collections quickly, and all collections are public by default. In Germany (where I live) exists a restrictive copyright law: Passionate pearltree-ver#2-users usually don't think about that and already have one foot in jail or will be forced to pay a lot of money for copyright-infringement by adhortatory chambers. So it is not unlikely that some affected persons might try to hold Pearltrees responsible for enticement of breaking laws.
Actually I made my peace with ver#2: That’s why although Pearltrees lost it’s mindmap ability, I did not find a mindmap/curatory app with comparable social features (and pricing). There exist some great curatory apps like keeeb, but eg keeeb lacks in hierarchically organizing information; there exist great mindmap tools likewise, but their pricing structure is awkward: They restrain their social key features to the paid version, hence their social community remains pretty small.
So thought it was easier to re-organize my pearltrees, replacing a lot of former text-formatted junctions by collections than recreating that stuff with a combination of a mindmap tool and keeeb. And heck - if I want to visualize my collection structure anyway, I still can use one of these nice’n fully fledged mindmap apps.
In brief: After some days of crisis I got back to business. However, I am not happy with Pearltree’s game plan. It is self-destructive; they could have done better - and they really need to enlighten their members about the danger of public sharing “pearled” web contents. by deuxpont May 30
maybe recreate ver 1 as another site? by healingshores May 30
Hello deuxpont ! Let's talk about it by email. We're very interested in your feedback! participation@pearltrees.com Thanks! by amsika May 23
I am not convinced by this pearl-unlike design. Moreover, I'm badly missing the visual structure of pearltrees#1. by deuxpont May 23