OLPC and AoIR 8.0 slideshows
Several folks have asked for slides from either the OLPC talk that I gave on Friday, or from AoIR several weeks ago.
Both sets of slides (in multiple formats) are available from http://stderr.org/~elw/2007/
(link) [elijahwright]
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animal rescue
we are now fostering two needing-much-love animals here.
1) Hera, an eight month old kitty, very skittish and non-people-adjusted.
2) Darcie, an (I'm guessing) eight to ten year old female cocker spaniel.
I should really post pictures, I guess. It is nice to have animals other than fish running around the house being friendly and playful. (These are very friendly animals, and so far I've had *zero* trouble with either - other than some minor toilet malfunctions, at least.)
(link) [elijahwright]
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calendar updates
I spent a few minutes moving things from my mailbox onto the google calendar that I was using for departmental and SLIS-related events last spring.
Anyone who's interested should be able to search at Google Calendar for "SLIS Doctoral Student Association" (or similar) and find it...
In bulk, I calendared the events of SLIS DSA's "Friday Conversations", running this fall, as well as the talk dates that katy's lab sent out for their talks. RKCSI's dissertation support group is on there too; folks are meeting tomorrow to discuss meeting times for that, so I have nothing else there to calendar, yet.
I like having things calendared, even if I don't make it to the events. Somehow it makes the world feel a little bit tidier, and I find that somewhat comforting...
(link) [elijahwright]
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tiger botia update
the two tiger botia appear to have scared the bejeezus out of the nuisance snails in my smaller fishtank.
I'm not seeing many of the mid-sized snails, anymore.
We haven't managed to 'catch' the botia eating any snails, and we don't see broken shell pieces, either. It does seem, however, that there are fewer snails in the tank.
The largest of the nuisance snails - the original, matriarch, snail - known derisively as "big momma" - has taken to burying herself quite deep in the gravel. I suspect that to be some sort of reaction to predation - she's never done that, before now.
I wonder how many snails the two botia have eaten since introduction... it would be very interesting to know within an order of magnitude or so. But I simply just don't know....
(link) [elijahwright]
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tiger botia (multiple)
I've introduced two tiger botia into the smaller fishtank in hopes that they will devour the burgeoning hordes of Malaysian trumpet snails - a nuisance species. I counted about 30 of them on the surface the other night. [They're sort of nocturnal- they get active when it is dark. Counting them is one of those things you do after they've had several hours of prolonged darkness.] That was 30 that were sizable - there are vastly more of them in the tank, but they're either deeply buried or too tiny to easily see.
Botia-variety fish are basically loaches. They get big. These two are about the size of a triple-A battery. If they get too big, I guess they'll have to go back to some pet store or another...
(link) [elijahwright]
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| Link: The Greek Mythology Personality Test written by Aleph_Nine on OkCupid Free Online Dating, home of the The Dating Persona Test |
boogs!
on a bug-filing spree today.
kind of fun, but also kind of twisted. ;)
(link) [elijahwright]
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Bloomington OpenSolaris User Group (BTN-OSUG)
Along with Phillip Steinbachs from The Center for Genomics and Bioinformatics, I am... 'encouraging' the formation of an OpenSolaris user group to serve the Bloomington and central Indiana area. [Indy probably needs a group all its own, eventually...]
We put a proposal in last week to the umbrella OpenSolaris organization; accepted and pushed through the process with flying colors. It was unbelievably *easy*. Now the hard stuff will start to come up.
A listserv and some content for our space on the opensolaris.org site are really the next things on the agenda. I think Phillip is taking charge of putting some content there, probably sometime this week.
Why OpenSolaris? Well... there are some things about OpenSolaris that meet different ecosystem needs than the Debian bits that I otherwise prefer to use. :-)
I am looking very much forward to Sun's Project Indiana, in hopes that the two sub-platforms (OpenSolaris and Debian) I use most for research computing will become a lot more similar than they currently are.
(link) [elijahwright]
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twilightimperium3 player map
(link) [elijahwright]
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twitter
i have a twitter account now - feel free to friend me or add me at your leisure. i
will, of course, reciprocate.
you can find me there at http://twitter.com/elijahwright
[what is twitter? twitter is a status-notification system for friends. or
for anyone, really. it looks handy, so i'm trying it out.]
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planetplanet update
I've updated planetplanet, the software that drives slisblogs.com, to a
slightly less ancient version.
We'll see whether this straightens out the "issues" with a few of the feeds,
or not.
[Note - bzr is *cool*. This software is one of the very few things that I
touch that uses bzr, sadly....]
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Why Doesn't Google Calendar Format Entries Correctly... Or Does It?
I just added the feed for the SLIS Doctoral Student Association to
slisblogs.
What a mess. First, I got every calendar item sucked onto the page at once.
THere are a LOT of them.
Second, the formatting kind of stinks. I'm guessing, at this point, that
maybe an update to the planetplanet software would help - but I'm not even
really sure. Getting rid of an extra "br" tag here and there may be tougher
than that............
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flickr brokenness
I had to disable the pulling of feeds from flickr to slisblogs.com. Something was, apparently, changing repeatedly at flickr - leading to some serious spammage of slisblogs with the same photos over and over. I don't like instability that much....
(link) [elijahwright]
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recent movie watching
Some reviews, based on my recent movie watching: 1) Superman Returns -- well, it stank. 2) V for Vendetta -- well, it was okay. I like the subversive elements. 3) Elizabethtown -- about E-town, which I drive through periodically on the way to visit the fam... okay, but a little less than lucid. Happy fuzzy movie, not really very clear at some points exactly what is going on.
(link) [elijahwright]
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new fishies
My fishtank suffered some casualties, so I had to boost the population.
Now in the tank are six more green tiger barbs, three dwarf gouramis, and a lone blue gourami that was in one of the tanks at PetCo....
Man, I dig fish.
(link) [elijahwright]
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Crackers
Last night, I made a trip to Crackers comedy club in Indy. Fun was had. The headliner is going to be on "bob and tom" Friday morning. I guess he was funny... sort of.
(link) [elijahwright]
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arrrrgh.
Tonight's fun: setting up an ipf firewall. On a machine running Solaris 9. Which isn't all that ancient, actually -- but which is no longer what we use for new machines.
A little frustrating. I haven't touched ipf on sol9 in *ages* - like four years - and there are a few cobwebs accumulating on those brain cells.
I'd much rather do a nice smooth upgrade to sol10, instead, but that would probably take much, much longer than what I just did.
(link) [elijahwright]
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test post
This is a test post - I'm trying out the interface to post to livejournal via jabber... from gaim, on ze linux desktop. I am pretty sure it will work, but we'll see.
(link) [elijahwright]
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the tone adults supposedly can't hear
Some of you may have heard about this new ringtone - the one that adults supposedly can't hear, but that teens can.
It turns out that I *can* hear it, and it is annoying as heck. Very, very painful whining noise with a good large dose of rough distortion in it. Painful on the ears.
(link) [elijahwright]
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Special Issue on FL/OSS
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(link) [elijahwright]
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T2000 / Solaris 10
Today's fun: jumpstarting Solaris 10 onto a Sun T2000. Nice box. Small, powerful, and incredibly noisy. I think we might have a dead fan bearing. I don't want to call support just yet... it isn't fun. Sun has horrible elevator music.
(link) [elijahwright]
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tooling around with databases
tooling around with databases today. moving big blobs of social network data into postgresql. painful, not fun, and frustrating. good, though. ;)
/snark
(link) [elijahwright]
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Which OS are you?

Which OS are You?
(link) [elijahwright]
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The top 20 geek novels, ones I've read in bol
The top 20 geek novels, ones I've read in bold.
1. The HitchHiker's Guide to the Galaxy -- Douglas Adams
2. 1984 -- George Orwell
3. Brave New World -- Aldous Huxley
4. Do Androids Dream of Electric Sheep? -- Philip Dick
5. Neuromancer -- William Gibson
6. Dune -- Frank Herbert
7. I, Robot -- Isaac Asimov
8. Foundation -- Isaac Asimov
9. The Colour of Magic -- Terry Pratchett
10. Microserfs -- Douglas Coupland
11. Snow Crash -- Neal Stephenson
12. Watchmen -- Alan Moore & Dave Gibbons
13. Cryptonomicon -- Neal Stephenson
14. Consider Phlebas -- Iain M Banks
15. Stranger in a Strange Land -- Robert Heinlein
16. The Man in the High Castle -- Philip K Dick
17. American Gods -- Neil Gaiman
18. The Diamond Age -- Neal Stephenson
19. The Illuminatus! Trilogy -- Robert Shea & Robert Anton Wilson
20. Trouble with Lichen - John Wyndham
(link) [elijahwright]
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People love SLIS podcasts!
See here:
http://www2.scedu.unibo.it/roversi/B
:)
(link) [elijahwright]
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elke michelmayr: a case study on emergent semantics in communities
folksonomies - what are they?
comparison to taxonomies
multi-user web applications that provide a simple categorization sy stem
- items: web pages, images, citations
tags = keywords ... can be chosen freely
every user has a web page with a list of own items
- sorted in reverse-chron order
- can be filtered by tags
public access to item collections and metadata
bottom-up approach to categorization
- no pre-defined model or hierarchy
- inconsistencies
-- synonyms, homonyms
-- singular and plural versions of a tag
-- keywords that conssit of two terms (ie semantic web, semantic_web,
semanticweb)
-- relies on aggregation of metadata
-- tag frequency distribution: tags most often used to annotate an item
categorize it best; no need to reach consensus
-- relationships between tags evolve from metadata
- amount of metadata crucial!
-- number of users, lifetime of folksonomy
comparison of metadata
- lots of discussion about taxonomies vs. folksonomies, eg clay shirky 2005
- experiment: compare metadata from two big community projects that
categorize web pages to find out about the differences
- dmoz open directory project http://dmoz.org
-- taxonomy for web pages
-- ~ 600k concepts and about 5M instances
-- available in RDF format (two big files)
- social bookmarking site del.icio.us
-- no official numbers; ~100k users
-- download the web pages (simple html)
procedure
-- use only items from del.icio.us that were annotated by more than
100 users (=popular items)
-- download random popular items from del.icio.us
-- lookup if items are present in the dmoz collection (~25% of the items
were also present in dmoz)
-- 788 items with metadata from both sources (~50% of them are instances of
dmoz concept Top/Computers)
preparation of data
- preparations (much mangling of data here...)
- example: Top/Science/Math/Publication -> publication math science
- how to compare?
-- avg dmoz hierarchy length: 4.67
-- avg del.icio.us tags per item: 24.59
comparison
-- lookup for each dmoz category (is it included in the del.icio.us tags?)
-- take top 1,3,5,10,15,all tags into account
--- top tag is included in ~50% of all cases
--- top 5 is the fairest comparison
--- top tags match more often than the less popular ones
folksonomies and peer to peer networks
- architectures are very diffferent
-- folksonomies are centralized systems, aggregation is easy
-- p2p networks are distributed, aggregation is hard.
- user behavior is comparable
-- act autonomously
-- no central authority
-- want to share information
- data from a folksonomy can be used to model peers and content distribution
- ...
can interest-based locality be observed?
- interest based locality (defn)
- method
-- retrieve all users from del.icio.us that store a random bookmark
-- retrieve all their collections
- retrieved 4 test sets
-- 155, 248, 280, 551 users
-- distribution of items among users nearly equal in the test sets
-- avg.: 84% of items are not shared.
related work
adam mathes, 2004: folksonomies - cooperative classification and
communication through shared metadata
clay shirky, 2005: ontology is overrated: categories, links, and tags
scott golder and bernardo huberman, 2005...
summary
- investigated the properties of metadata provided by a folksonomy
- compared it to dmoz data collection
- tried to find interest based locality
- paper contains some other experiments i did not have time to tell you
about
- open questions
-- is there a way to combine the bottom-up and top-down approach for
creating metadata
-- how much could the semantic web benefit from it?
audience questions:
have you thought about comparing the tags used at delicious to the meta tags
provided by page authors? e.g. to detect spamming by page authors of search
engines
- mention of delicious director
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Phillipe Cudre-Mauroux: analyzing semantic interoperability in bioinformatic database networks
1) peer data management systems
2) semantic interoperability in the large
3) the sequence retrieval system
- degree distribution
- analysis of giant component
- weighted analysis
4) conclusions
beyond keyword search - searching semantically richer objects in large
scale herterogenous networks (semi-structured or structured data)
decentralized data integration
large scale information systems (e.g. WWW) VS distributed databases
data integration: LAV/GAV
- traditional database techniques (LAV/GAV) rely on centralized schemas to
integrate data sources.
- not applicable to our context
-- scale (upper ontologies?)
-- churn
-- autonomy
- how can we foster semantic interoperability in decentralized settings?
semantic interoperability
- from 'own schema' to 'known schema'
- extending semantic interoperability to ....
peer data management systems
- pairwise mappings
-- peer datamanagement systems (PDMS)
- local mappings overcome global heterogeneity
-- interactive query rewriting
semantic mediation layer
- semantic mediation layer
over:
- overlay layer
over:
- physical layer
correlated/uncorrelated among the three layers.
schema-to-schema graph
- inter-organization of the different schemas used by the peers
-- logical model
-- directed
-- weighted
-- redundant
the semantic connectivity graph
- definition (semantic interoperability
-
-
-
observations
- theorem
- observation 1
- observation 2
semantic interop in the large
- how can we analyze semantic interop in large-scale pdms?
-
size of the giant component
the sequence retrieval system
why is srs interesting?
- applying our heuristics on a real large-scale corpus of interconnected
databases
-- more than 380 databanks
-- more than 500 (undirected) links
-- data used by professionals on a daily basis
crawling the srs schema-to-schema graph
- custom crawler
- as of may 2005 (ebi repository)
-- 388 nodes
-- 518 edges
- giant connected component (187 nodes)
- power law distribution of node degrees
- clustering coefficient = 0.32
- diameter = 9
results
- connectivity indicator ci = 25.4
-- super critical state
- size of the giant component
-- 0.47 (derived)
-- 0.48 (observed)
graphs with same power-law degree distribution
- varying number of edges
analyzing weighted networks
- do we have a sufficient number of 'good' mappings
- introducing quality measures from the mappings
-- weights
-- attribute /schema level
-- cf. Chatty Web (WWW03)
- semantic query forwarding
-- per hop forwarding behaviors
-- only forward if w sub i >= tau
--- tau = 0 : flooding
--- tau = 1 : exact answers
weighted results
- same degree distribution (388 nodes)
- uniformly distributed weights between 0 and 1
conclusions
- analysing a real network of bioinformatic databases
-- accurate results (even for relatively small networks)
-- weighted / unweighted
- current works
-- compositions of weights along a path
-- semantic random walkers
-- public domain simulator
- future works
-- analysing other forwarding behaviors
-- implementation in a real pdms (self-organizing mappings)
--- gridvine
references
a necessary condition for semantic interoperability in the large
cudre-maroux and karl aberer (ODBASE 2004)
gridvine: building internet-scale semantic overlay networks
ISWC2004
semantic overlay networks (tutorial) VLDB 2005
complete reference list available at http://lsirpeope.epfl.ch/pcudre
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heiner stuckenschmidt: social network analysis as a basis for partitioning
ontologies
motivations - the case for ontology partitioning
a partitioning method
- create a dependency graph
- strength of dependencies
ontologies are the backbone of semantic web applications
more and more large ontologies become available
maintenance and handling is becoming a problem
the case for partitioning:
distributed development and maintenance
selective publication and use of terminologies
manual inspection and validation
editing, visualization, and reasoning
an abstract view of the problem:
despite the standardization of languages there is no agreement on the
way ontologies are represented.
- all ontologies contain classes
- most organize them in a hierarchy
- many define relations between classes
- some provide formal definitions of classes
we concentrate on partitioning ontologies into disjoint sets of
concepts. class hierarchy, relations, and definitions provide input
for the partitioning algorithm.
overview of the process:
1) create dependency graph
dependencies I: subclass relations
dependencies II: shared relations
2) determine strength of dependencies
relative strength networks
- compute relative strength [Burt, '92] of dependencies
3) compute partitions
computing islands
- we use maximal line islands [Batagejl 2000] to compute partitions in
the dependency graph [a set of vertices is a line island in network if
and only if it induces a connected subgraph and the lines inside the
island are stronger related among them than with the neighboring
vertices. in particular there is a maximal spanning tree T over nodes
in the island such that....
- the minimal weight in the spanning tree is called the 'height' of an
island.
- understanding islands
- result for the example
4) improve partitioning
improving partitions
- islands are often very small (2-4 nodes) resulting in unwanted
partitions of the ontology
- observation: small islands almost always have a large height value
(1 or 0.5)
- approach: merge partitions with a height of 1 or 0.5 with
neighboring partitions, based on strength of connection: ...
ontology partitioning tool
- features:
-- owl and kif import
-- selection of criteria
-- computation of line islands
-- graph export
-- precision and recall measurement
an experiment
- data: acm topic hierarchy
- partitioning method:
-- relations: hierarchy
-- maximal size: 100
-- merging threshold: 0.2
- evaluation:
-- topics on dutch cs department home pages
-- compared with root nodes of determined modules
- results
-- terms do correspond to major areas in CS
-- quite some overlap with the extracted terms
-- further experiments needed
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Wallace and Gromit: the Curse of the Were-Rabbit
A small gang of us went to see the new Wallace & Gromit movie last night. Claymation goodness everywhere.
We also made pit-stops at Anatolia (mmm, turkish food) before, and @ the Irish Lion afterwards... photos have been dutifully flickr-ized by those of us in attendance. ;)
(link) [elijahwright]
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Sea Lions vs. Stateys

(link) [elijahwright]
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Wow.

Wow.
(link) [elijahwright]
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the "google *name* needs" meme
here're my results:
Elijah needs to quit playing Messiah
Elijah needs a spanking, and quite frankly so do his parents.
Elijah needs a family
Elijah needs his leg rehabbed and his nurse is Robin Wright-Penn
Elijah needs to cross a river
Elijah needs limits set
Elijah needs stuff like this every now and then to keep his mind off things
Elijah needs to be changed
Elijah needs warming
Elijah needs to leave around noon.
Elijah needs to understand
Elijah needs true, solid things, things that bear a significance, things that
have an history.
Elijah needs some sexual love...
Elijah needs to grow the f*ck up...
Elijah needs to stop and think about this big time!
Elijah needs a puppy, that's all I know about that.
(link) [elijahwright]
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back from aoir6
i'm back from aoir6 in chicago. all parties involved had a good time at the conference, but some of us are especially glad to be home again.
all talks by IU SLIS people were well attended and went well. as always! :)
Lots of pictures available via my flickr space... enjoy those.
Also see the picture of me in Sarah Mercure's flickr photos... think "jazz hands".
(link) [elijahwright]
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a great weekend
This past weekend was what I can only characterize as 'one of those great weekends'. The kind that you can't really explain, but that you know were 'special' in comparison to the rest of the daily grind.
I'm being cryptic (yes, it is catching!), but not totally without reason. You had to be there, I think.
A lot of things are in flux for me right now -- either they're settling into place, or I'm re-calibrating them (and my reactions to them), or I'm making active choices about what it is that I want to see shaping my actions and activities.
Some things are easy to change. :) Some things are harder, like my nasty habit of worrying or of working when I should be attempting to have a good time. I'm working on all of this, piece by piece.
This is probably the most 'open' thing I've blogged in a long time. Not much detail, but a lot of the outlines of what is shaping my life right now.
(link) [elijahwright]
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GO IUPD!
This is a somewhat icky, somewhat random thing that happened last night after I took J. home.
Driving down 10th, I was behind a car full of kids (kids meaning, 'scruffy undergrad looking types', here, not necessarily literally 'kids'.. There must have been 8-9 of them crammed in there. It looked dangerous.
We get to the intersection right there at Yogi's... this kid leans out, starts yelling, and hurls a glass beer bottle at the sidewalk in front of one of the pedestrians. [I assume that it cut her when it broke... she jumped, was brushing at her ankle, etc.]
Kids in car take off. I kinda sped up to get their plate number -- had my phone in my hand, etc.
Then I see blue lights. ;) A marked car sped up, jammed it on around me at about 50mph, cut me off, and just about pushed these kids off the road.
I haven't been so glad to see blue lights (or so glad to see a cop 'on the ball') in years.
GO IUPD! :)
(link) [elijahwright]
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a bit of r0x0rin'....
Go me. i have my other blog rigged up to suck entries off of livejournal now.
This means that i can use the jolly-jolly-whizzy-bang LJ client (Drivel, actually...) to post stuff to LJ, and have all of the posts show up elsewhere too. This is SuperCool, in that I don't have to depend on LJ's servers not crashing. I don't trust them.
This bit of geek rambling brought to you by the letter J, the number 2, and a bit of bliss.
(link) [elijahwright]
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WTF?
So I'm not actually planning to post anything here.
If I use this space at all, it will probably to mirror content from my other weblog.
Sorry. :)
(link) [elijahwright]
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a new post
this is a test post, to make sure that i'm actually able to use this desktop client i'm testing...
(link) [elijahwright]
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Souls Geeking out on blogthings tonight... let's play spam-the-aggregator!
| You Are a Dreaming Soul |
|
Colossal Death Robots

Which Colossal
Death Robot Are You?
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