25. IYPT Bad Saulgau » blog http://iypt.de IYPT, Physik-Weltcup, Wettbewerb, Wettkampf, Bad Saulgau, Weltmeisterschaft in Physik Sun, 28 Oct 2012 15:49:01 +0000 en-US hourly 1 http://wordpress.org/?v=3.6.1 Video of the finals http://iypt.de/?p=1957 http://iypt.de/?p=1957#comments Tue, 31 Jul 2012 10:09:22 +0000 Timotheus Hell http://iypt.de/?p=1957 Here we go: Full coverage of the final’s of IYPT 2012. Have fun watching!

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The Finals of IYPT 2012 http://iypt.de/?p=1823 http://iypt.de/?p=1823#comments Wed, 25 Jul 2012 07:05:33 +0000 Timotheus Hell http://iypt.de/?p=1823 more…]]> Just like back in 2010, here are some notes and pictures taken during the finals:

The teams of Korea, Singapore and Iran are getting ready!
First we’ll hear WuHyun Sohn from Korea with his report on Problem 1. Gaussian cannon!

President Alan Allinson is asking everybody in, the Stadtforum Bad Saulgau is completely filled, everything is prepared and the teams are getting ready!

Introduction of the teams:

Three former participants in the Jury: Ilya, Martin and Kathryn:

Korea’s report hast just started. Here’s Singapore’s mascot listening carefully:


The jury for IYPT 2012 finals:

Alan Allinson, Prapun Manyum, John Balcombe, Ivan Antsipau, Chuanyong Li, Valentin Lobyshev, Samuel Byland, Kreso Zadro, Kathryn Zealand, Martin Plesch, Othmar Marti and Ilya Martchenko

The opponent takes the floor:

Discussion, whiteboard:

From left to right:
Team Iran – Reviewer – Seyed Mohammadali Modarressi
Team Singapore – Opponent – Jie Yeo
Team Korea – Reporter – WuHyun Sohn

Last year Korea ended their concluding remarks with the words “This is physics” – today we get to see more fun videos :)

Juror grades are in:

REP: 8 8 9 8 7 8 7 7 7 8 8
OPP: 8 8 8 8 8 6 8 8 8 9 8
REV: 8 9 7 9 9 7 8 9 8 8 9

Stage 2 is about to start.
Daniel Keat Kay Mark will do his report on 5. Bright waves.

I asked the teams before if they needed a table for showing experiments. Sadly they don’t :)

It’s a fight of Captains:

Grades from stage 2:
REP: 9 9 8 8 8 7 7 6 6 7 10
OPP: 7 8 8 9 8 7 7 7 6 6 9
REV: 9 9 9 9 9 9 8 9 9 7 8

Waiting for Iran’s report. They might well win this IYPT if their report is good – Korea and Singapore got the exact same points for their reports. It’s your turn now, Rojin Anbarafshan!

REP: 7 9 10 9 9 8 8 6 6 7 8
OPP: 9 9 9 8 7 9 7 10 9 7 9
REV: 8 8 7 7 8 7 8 8 8 7 9

So the winners are:

1) Korea
2) Iran
3) Singapore

Congrats to everyone!

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Tournament Statistics http://iypt.de/?p=1790 http://iypt.de/?p=1790#comments Tue, 24 Jul 2012 12:15:19 +0000 Timotheus Hell http://iypt.de/?p=1790 more…]]> I’m pretty sure you all like numbers a lot. Even more so if they’re used to count stuff:
We printed and scanned about 1000 Scoring Guidelines, almost as many A4 pages with results and previews and another 900 pages of the report on the problems for 2013. There were 18 Beamers in use in the fight rooms, another two in our IT department, and about 5 spare. The fight assistants double checked every grade, we then again checked whether the numbers on the SGs and those input to newtoon are the same. Adding this up there’s been about 7500 grades checked. The combination of the German IT (setting up their own network and server, cloning a special Gentoo installation to 20 Laptops), the Chinese volunteers that did a great job as fight administrators and our new software worked almost flawlessly.

Well, and then there’s the actual tournament statistics, starting with the results.
This graphic shows what problems were presented and rejected:

And I’m sure you want to know what the grades looked like – here’s the jurors’ means and standard deviation:

Also, in case you wonder if the jurors were less homogeneous in their grading: Here’s the mean of std. devs and of min-max-differences for each performance:

IYPT2010: 0.8058 / 2.3137
IYPT2011: 0.9094 / 2.5206
IYPT2012: 0.8739 / 2.4333

So no, the grades weren’t too inconsistent, even more consistent than last year.

When Martin Plesch talked to the Jury, he was hoping for an overall mean of 5.5 (in the center of our scale) and a reasonable standard-deviation, somewhere around 1.5. Here’s the number for the IYPT2012:
Mean of Juror means: 5.82
Mean of Juror Stddev: 1.54

So our Jurors did a pretty good job I’d say!

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Final: Korea, Singapore, Iran http://iypt.de/?p=1793 http://iypt.de/?p=1793#comments Tue, 24 Jul 2012 11:54:24 +0000 Timotheus Hell http://iypt.de/?p=1793 Just in case you haven’t heard yet: We’ll have a final of three teams, namely Korea, Singapore and Iran. They will now select their problems for tomorrow. Detailed results are available as usual here: http://results.iypt.org/IYPT2012/

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the clock http://iypt.de/?p=1722 http://iypt.de/?p=1722#comments Sun, 22 Jul 2012 09:35:54 +0000 Timotheus Hell http://iypt.de/?p=1722 Some have asked already whether they can get the clock. sure :) it’s open source (GPL3) and available here:
http://intern.sfz-bw.de/~simeon.voelkel/gentoo/iyptclock-latest.tar.bz2

If you prefer something browser-based, here’s a clock Georg and I designed (also open source, CC BY-NC-SA 3.0):
https://newtoon.iypt.org/init/static/clock.svg

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we had to find a way to get to the fight rooms quickly… http://iypt.de/?p=1706 http://iypt.de/?p=1706#comments Sun, 22 Jul 2012 09:15:00 +0000 Timotheus Hell http://iypt.de/?p=1706


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problems from round 1 http://iypt.de/?p=1698 http://iypt.de/?p=1698#comments Sun, 22 Jul 2012 07:13:47 +0000 Timotheus Hell http://iypt.de/?p=1698 This shows which problems were challenged. Red shows rejections, the numbers count how often they were accepted.

oh, and seeing this graph, here’s one from our server, showing the traffic to and from the server that hosts iypt,org, newtoon, and the results:

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first results are in http://iypt.de/?p=1654 http://iypt.de/?p=1654#comments Sat, 21 Jul 2012 18:20:17 +0000 Timotheus Hell http://iypt.de/?p=1654 more…]]> First results are in. They can be found at http://results.iypt.org/IYPT2012 and the scanned Scoring Guidelines that include the partial grades are available here: http://results.iypt.org/IYPT2012/SG/
Update: The previews for round 2.

Overview for Round: 1

Rank Team TSP =
1 Korea 44.7 = 44.7
2 Singapore 40.1 = 40.1
3 Russia 38.7 = 38.7
4 Slovakia 38.5 = 38.5
5 Chinese Taipei 38.1 = 38.1
6 Switzerland 37.2 = 37.2
7 Belarus 36.7 = 36.7
8 Austria 36.5 = 36.5
9 Georgia 35.5 = 35.5
10 Germany 35.4 = 35.4
11 Iran 34.8 = 34.8
12 New Zealand 34.8 = 34.8
13 Czech Republic 34.1 = 34.1
14 China 33.7 = 33.7
15 Brazil 33.5 = 33.5
16 France 31.2 = 31.2
17 Australia 30.9 = 30.9
18 Poland 30.1 = 30.1
19 Bulgaria 30.0 = 30.0
20 Sweden 29.9 = 29.9
21 United Kingdom 29.4 = 29.4
22 Thailand 29.2 = 29.2
23 Hungary 27.6 = 27.6
24 Kenya 23.2 = 23.2
25 Indonesia 22.3 = 22.3
26 Slovenia 20.8 = 20.8
27 Netherlands 17.0 = 17.0
28 Nigeria 14.5 = 14.5

 

Thomas came all the way from Frankfurt to help us over the weekend – preparations for tomorrow are already done.

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Schedule http://iypt.de/?p=1632 http://iypt.de/?p=1632#comments Sat, 21 Jul 2012 09:20:19 +0000 Timotheus Hell http://iypt.de/?p=1632 Hey! We’re done with both the schedule for the teams (based on the drawing of lots) and the jury distribution (based on the team’s schedule). We did it in record time. Hopefully with a record minimum of mistakes too :)

Here is the schedule, based on the drawing of lots and here we have the Jury Schedule.

http://iypt.de/?p=1546 more…]]> The LOC must have been busy in the last few weeks: There are smaller and larger hints that the IYPT takes place in Bad Saulgau literally everywhere – here’s a few of them that I photographed so far:
IMG_1757 IMG_1760 IMG_1761 IMG_1762 IMG_1763 IMG_1764 IMG_1765 IMG_1766 IMG_1769 IMG_1773 IMG_1774 IMG_1776 IMG_1777
I was especially excited to see little exhibitions showing former IYPT problems, posters and experiments in the display-windows of local shops. I guess that’s the main advantage that a small city like Bad Saulgau has to offer – everyone including the city’s mayor is involved and they all do their very best to make the IYPT family feel at home!

Find us on facebook for more photos!

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mascots http://iypt.de/?p=1475 http://iypt.de/?p=1475#comments Wed, 18 Jul 2012 21:49:25 +0000 Timotheus Hell http://iypt.de/?p=1475 more…]]> A mascot, according to wikipedia, is “any person, animal, or object thought to bring luck”.
Even though you’d expect these young physicist to despise the notion of luck, many teams have mascots, some already for many years.
Probably the reason for that is the second meaning wikipedia gives: “anything used to represent a group with a common public identity”.
So who are the brave mascots that “represent” some of the IYPT teams?
Well, the first one I met was “Schrödigger Der Kangaroo”, the Australian teem’s mascot. Didn’t anybody tell them that it’s “das Känguru”?
According to its facebook profile, Schrödigger was born August 12, 1994 which makes it one of the younger mascots. Lise Muh, the Austrian mascot, was born on November 7th, 1978. She’s named after one of the great Austrian female Physicists, Lise Meitner. Then we have Hugo Brasil from – you guessed it: Brasil – and Ernie Rutherford from New Zealand.
And last not least Supermilchchue from Switzerland.

Here’s some photos of all these brave mascots :)
IMG_1754 18_NewZealand_x8 38375_144012348958519_931637_n 169322_294967413933870_339723965_o 38374_103723969680811_5702596_n 38165_103575116363201_5789151_n 299_32408130490_6783_n 299_32408065490_707_n 409659_264177533681957_1549864910_n 334253_104189333060601_2072785676_o

Leave a comment if your team has a mascot too!

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the IYPT has (almost) started! http://iypt.de/?p=1216 http://iypt.de/?p=1216#comments Wed, 18 Jul 2012 14:26:56 +0000 Timotheus Hell http://iypt.de/?p=1216 more…]]> The tournament officially starts when Alan Allinson opens it this Saturday. But for me the start is leaving home (though I must admit going from Graz to Bad Saulgau for the third time now is not too exciting any more) and switching to that deep IYPT mode, were everything else slowly fades away. Teams from all around the world, preparations, fights, sleep deprivation – it’s a very special blend of topics, feelings and impressions every year.

Next time i’ll write it will be from Bad Saulgau. See you there!

Everything and everyone is packed :)

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problems. and why there’s 17 of them. http://iypt.de/?p=1329 http://iypt.de/?p=1329#comments Sat, 14 Jul 2012 22:11:42 +0000 Timotheus Hell http://iypt.de/?p=1329 more…]]>
At the core of the IYPT there are the 17 problems that the teams work on for almost a year. They have been repeatedly credited as source of ideas for laboratory tasks, thematic activities in schools, graduation research projects, or even everyday physics teaching.

They look like this one from 2012′s set:
“A long string of beads is released from a beaker by pulling a sufficiently long part of the chain over the edge of the beaker. Due to gravity the speed of the string increases. At a certain moment the string no longer touches the edge of the beaker. Investigate and explain the phenomenon.”

As a participant you might be fascinated by some of them, irritated by others and some will definitely lead to long weekends and a bit of frustration. But have you ever thought about where these problems come from?
Is there a holy book of problems (*) where we can look for them? Is there a large committee of experts spending weeks doing experiments to come up with new things to investigate?

Well, it’s a bit of both actually. Each year the members of the international organizing committee (IOC) are asked to submit ideas for problems. At the IOC meeting, which takes place during or past each year’s IYPT, there’s a discussion on the problems to select for next year and eventually a decision. Sometimes this takes long, other times it takes very long to reach a conclusion. To make sure that we have new high quality problems, even after all these years, last year we decided to introduce a new process:
A pre-selection committee was formed to improve our selection process and we opened the submission of ideas to everyone using a submission form on our website . Details of the new process are documented in the EC minutes from last October.

The committee did some impressive work: The report Ilya has submitted to the IOC is 60 pages and they worked through 89 proposals from 18 countries.
So, what was their selection based on? What makes a good set of problems? The report sums it up as follows:

  1. No repeated, dangerous, trivial or solved problems.
  2. Relevance, consistency, feasibility from the IYPT perspective, and reasonable novelty.
  3. Balanced coverage of various areas of physics.

If you’re interested in some background material for this year’s problems, go check out the kit.

As every year, I’m excited to see what the 17 problems for the next year will be. Why 17 you might still ask yourself: An experienced IOC member once explained it to us in the following way: “Well,… You see, 16 would be too few, but 18 would be too many.”

(*) Some former problems have been inspired by a book that comes quite close to this notion – The Flying Circus of Physics.

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finals http://iypt.de/?p=1301 http://iypt.de/?p=1301#comments Wed, 11 Jul 2012 22:06:49 +0000 Timotheus Hell http://iypt.de/?p=1301 more…]]>

New Zealand in the finals of IYPT 2010

There’s always something special about the finals: It’s the time to give your peak performance. There’s an audience of your peers who all have worked on the problems you present, who are experts in what you report.
Twice as many jurors who watch. All of them experienced, some of them university professors, some teachers, some are former participants. You get a microphone and a stage – and sometimes, there’s even a camera or two looking at you:

2009:

2010:

2011:

PS: You can now link to this blog using http://blog.iypt.de
PPS: Comments are now enabled also for the older postings!

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grading http://iypt.de/?p=1222 http://iypt.de/?p=1222#comments Sun, 08 Jul 2012 23:06:43 +0000 Timotheus Hell http://iypt.de/?p=1222 more…]]> As promised last time, let’s think about the grading itself a bit. Back in 2010, without the help of our new Scoring Guidelines , the distribution of grades looked like this:

The diagram, like this description taken from Ilya’s archive, shows the distribution parameters (population mean and standard deviation) for grades of individual jurors at the 23rd IYPT (2010.) The grades are averaged across all stages, performances, and PFs. The data clearly reveals that the individual grading standards vary among jurors, and result in a marked spectrum of average grades in the range from ca. 6 to ca. 8. The relative standard deviations, not shown here, vary in the range from ca. 0.1 to ca. 0.3. The marks above 8—9 and below 5—6 are statistically rare events.

The perfect 5.5-mean.

One of the SG’s goals is to make it harder for jurors to just give a 7 all the time. Besides being a nice prime number, 7 also is a mark weak teams are happy about and strong teams aren’t too sad about (well, as long as it’s not the finals). Clearly this is not what we want for a tournament. Ideally the overall mean grade in a tournament is somewhere close to 5.5 with all the grades used – e.g. with a reasonable standard deviation. With jurors only giving marks from 6 to 8, we effectively narrow the results so much, that eventually randomness and rounding effects become much to influential. The SG certainly help to avoid this, with results from our national YPT in Austria showing that the standard deviation has improved a lot in the past two years and most of the jurors giving grades as low as 1 and as high as 10 over the course of the tournament.

update: a few more words from Ilya :) :

[01:14:06] Martchenko, Ilya: http://iypt.de/?p=1222
[01:14:59] Martchenko, Ilya: if you want to be completely open, you can also write 
that it's *very* important to have all jurors staying centered around one, uniform grade
[01:15:06] Martchenko, Ilya: i.e. 5
[01:16:11] Martchenko, Ilya: if it's not happening, we may easily have (and always had) the following situation:
[01:16:33] Timotheus Hell: c'mon, i posted this like 5min ago. How can you be that fast?! :D 
[01:17:02] Martchenko, Ilya: in the fight room A by a pure coincidence we have those jurors 
who put slighly higher grades (right leg of the spectrum) than in the fight room B
[01:17:17] Martchenko, Ilya: ** c'mon, it's by job to monitor mass media :D 
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Scoring Guidelines http://iypt.de/?p=1219 http://iypt.de/?p=1219#comments Fri, 06 Jul 2012 09:40:06 +0000 Timotheus Hell http://iypt.de/?p=1219 more…]]> The Scoring Guidelines were introduced at the IYPT last year in Iran. Martin Plesch actually gave an in-depth introduction that I made a video of, so in case you’re interested:

Now of course this wasn’t something that the Executive Committee came up with during one of their short meetings. It really was a long process that eventually led us to what I consider a very reasonable and helpful guideline for both new and experienced jurors. As the minutes of the EC meeting back in November 2010 state, “[a]fter discussing many alternatives, MP, TH and JB each volunteered to prepare a proposal for updated guidelines which will be circulated among EC members for a final decision during spring 2011.” My first proposal that I was willing to send around to some of my IYPT-friends dates back to December 2010. It’s interesting how this evolved with all the feedback I got, until eventually sending a version 4 to the EC mailing list in February 2011. Other proposals were submitted too and a long discussion via email followed with a stable result evolving sometime in April 2011. Eventually we voted on a proposal and decided to try it at some national YPTs first. Since the feedback there was mostly positive we went ahead and introduced them at the IYPT2011.

Something as complex as these guidelines will never be perfect. I’m sure the EC will continue to listen to any feedback and that the guidelines will continue to evolve. Much more important than the final details however is, that there are guidelines at all: To me it’s important to have rules that clearly state what this tournament is about – that’s what’s reflected in these guidelines: Physics and communicating Physics. And to make the grading even more transparent for the participants, the grading sheets with their partial grades will be scanned and published.

Next time I’ll write something about the grading and how it has changed over the years.

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more IYPT facts and trivia http://iypt.de/?p=1214 http://iypt.de/?p=1214#comments Wed, 04 Jul 2012 21:59:42 +0000 Timotheus Hell http://iypt.de/?p=1214 more…]]> Hey! Not sure if I can keep up with writing this much for our blog – but then again there is a lot to say about IYPT: Our website has some information, a bit about the history for example. Then there is the excellent wikipedia article. The most impressive collection however is the work of Ilya Martchenko, located at archive.iypt.org: A massive archive dating back to 1979, including presentations, slides, papers and articles written for or about the IYPT. And you’ll find a collection of all the IYPT problems there.
We’d of course never mistake correlation for causation, still it’s soothing to know how successful some former participants became:
Some have completed an undergraduate degree in one and a half years, others have promptly brought their still-IYPT project to a mainstream publication while or even went on to get published in Science or Nature, make front covers, or reach a substantial h-index. Some past participants went on to become indie movie directors, top executives in major banks, or CEO at companies with $120M revenue. Surprisingly, the IYPT has even seen a team leader who went on to become a national prime minister.

Personally I think it’s just amazing with how much dedication and how successfully Ilya has been working on collecting and archiving all of this IYPT-related information. If there is any (new) fact about one of the (old) IYPTs you can share: Ilya will participate at this year’s IYPT as a Juror and I’m sure he’ll be more than happy to collect any new information or material, like documents, photos or videos from you!

To make sure you know whom to approach, here’s a video I took back in 2011 when the archive was officially launched at the 13th AYPT:

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the biggest IYPT ever – and some other numbers http://iypt.de/?p=1172 http://iypt.de/?p=1172#comments Sun, 01 Jul 2012 15:23:43 +0000 Timotheus Hell http://iypt.de/?p=1172 more…]]> I like numbers and comparing things – that’s something I probably share with many IYPT participants. With newtoon we’ll have all sorts of stats about the tournament itself. But for now – let’s collect some facts and numbers about the IYPT 2012: It’s the biggest IYPT ever, with 28 different nations participating. But is Bad Saulgau the smallest city that has ever hosted the IYPT? One might think so, having had the IYPT in cities like Tehran, Vienna, Tianjin or Seoul. Going back a bit further, 17 years to be precise, the IYPT was hosted in a city that will probably keep the title of smallest-IYPT-host for long: Spała in central Poland currently has a population of 400. That might have been different back in 1995. However also the IYPT has grown: Nowadays counting in all participants, volunteers, jurors etc we’d almost double the population in Spała.
Of the few smaller cities that have had the privilege to host the IYPT, another one is very close: Donaueschingen hosted in 1998. And looking at the map of IYPT hosts, we realize that there is yet another former host nearby: Winterthur in Switzerland which hosted in 2005.

Other numbers never change – we’ll have 17 Problems and Teams of 5 students. Some numbers change slowly: It’s the 25th IYPT already. To celebrate, we’re looking forward to welcoming Evgeny Yunosov, the “father” of the IYPT who was the organizer, main activist and supporter of this new type of competition.

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newtoon – new tournament organizer over network http://iypt.de/?p=1168 http://iypt.de/?p=1168#comments Thu, 28 Jun 2012 16:32:18 +0000 Timotheus Hell http://iypt.de/?p=1168 500 commits to our svn repository later we’ve completed what might well become the backbone of most future YPT competitions. Newtoon replaces the old java software Georg wrote about a decade ago, countless excel-sheets former LOCs have used and adds many new features: Fight assistants will have their own account and can more…]]> Yes, finding a suitable acronym for this piece of software Georg, Wolfgang and I have been working on since January proved a first challenge. About 350 person-hours and >500 commits to our svn repository later we’ve completed what might well become the backbone of most future YPT competitions.
Newtoon replaces the old java software Georg wrote about a decade ago, countless excel-sheets former LOCs have used and adds many new features:
Fight assistants will have their own account and can log-in from any internet-enabled computer (in Germany pre-configured Laptops will be provided and ready in each fight room). It will allow them to quickly select their room and round and start entering jurors’ grades. Fight-preview sheets will be generated automatically according to the IYPT regulations. As soon as an administrator approved the input grades, the results will immediately be available online. Once the tournament has started, you’ll find all results and previews here: http://results.iypt.org/IYPT2012/ .
Additionally the system will provide the IOC and LOC with valuable tournament statistics that will help them to further evaluate current scoring guidelines.
That all might sound simple, but doing it right proved challenging. There’s client- and server based validation of any user input, different caching strategies e.g. of results to keep the load on the server low, user authentication with different roles to separate fight-assistants and tournament organizers. Finally there are more boring features like the import of names and schedules to our system but also quite tricky ones like concurrency issues that have to be dealt with, as potentially up to 20 users will input data in parallel.

So far it’s all looking good, we’re continuing to make some final design tweaks and the software was successfully tested at our local YPT.

If you’re a participant the main advantage is that you’ll be provided with more detailed fight results than ever before and faster than ever before.




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a few words about this blog http://iypt.de/?p=1150 http://iypt.de/?p=1150#comments Mon, 25 Jun 2012 09:15:09 +0000 Timotheus Hell http://iypt.de/?p=1150 more…]]>

Tim at the IYPT in Iran

Hey!
I’m Tim, former IYPT participant, former IYPT Executive Committee member, 2010 LOC member, iypt.org webmaster and lots of other ypt-related things. This year I’m lucky to be present for the first time at an IYPT without any official role at all – yet probably I’ll be doing one of the most important jobs for all of you participating: Together with Georg and Wolfgang I’ll be responsible for results and fight-previews, distributing jurors to groups and all that other tournament related stuff.

I’ve been blogging about the past two IYPTs and this year I was asked to do the same here :) So during the tournament you will find the latest news like results, previews etc here.

Make sure to also visit the iypt 2012 facebook page at facebook.com/iypt2012.

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