Archive for the 'Uncategorized' Category

Happy holidays !

Wednesday, December 30th, 2015

randform wishes everybody happy holidays and a good start into the new year!

To stay in the mood some chrismas caroling by pianist Soheil Nasseri at his appartment:

Soheil Nasseri’s youtube channel has of course also some more elaborate music :) -including a video of the performance of the Piano Concerto No. 1 by Rachmaninov at the St. Petersburg Philharmonia which has gotten meanwhile over 300.000 plays.
For those who would like to hear the Piano Concerto live – there is an upcoming performance with the Berliner Symphoniker in the great hall of the Berliner Philharmonie on Sunday Feb 21. at 4 p.m. It might be sold out.


Monday, December 7th, 2015

Reader Ahmed asked about my ancestors from Heiligensee:

Why is that place where you live called holy lake ?


Berlin Art Week

Sunday, September 13th, 2015

Acrylic paint on cardboard. 60×70 cm. artwork by Marion Ditzen. Title: “Keine Gähngefahr mehr auf der Artig Week: König Hui und das Ming-Pling-Bling.” Any resemblances to real persons are purely accidental and not the intent of the artist.

I would like to remind you of the Berlin Art Week, which is taking place this week in Berlin:

The fourth Berlin Art Week will be held this year from 15–20 September 2015. For six days, art lovers from all over the world will gather in Berlin.

By the way I hope the above artwork by Marion Ditzen will eventually be donated FOR SALE for supporting a local restoration project here in Marzahn. I might eventually talk about that project later. Please try to convice the artist in the comment section below that the donation for such a project would be a good idea.


Thursday, May 28th, 2015

Simulation of Earth’s magnetic field in interaction with (solar) Interplanetary_magnetic_field.
Image public domain from Wikipedia by Nikolai Tsyganenko, USRA/NASA/GSFC.


Methane and tectonics

Saturday, February 7th, 2015

Image on top from NASA via Wikipedia (public domain), the bottom image is a copy, where I outlined a possible plate


remarks on latent nuclear risks in the vicinity of nuclear plants

Sunday, October 26th, 2014


virtual assets sizes

Saturday, May 31st, 2014

“Wann dreht der Avatar Gardner wieder am Nasenhockeystick?” by artist: Superkockaina; pastel and acryl on paper. Artwork found in Tatoo studio: “Haut hin”.

I am currently trying to gather some data on the size of the games/virtual goods market and in particular the size of the corresponding work force. According to the company superdataresearch the virtual goods market is now at about 15 billion $.

To get a feeling for the size of this market I was looking for some other market sizes so like I found the global market size for the production of drugs in 2003 was somewhat similar in size, namely around 13 billion $ (page 16 in the world drug report):

“The value of the global illicit drug market for the year 2003 was estimated at US$13 bn at the production level, $94 bn at the wholesale level (taking seizures into account), and US$322 bn at the retail level (based on retail prices and taking seizures and other losses into account).”

I couldn’t found though much on the workforce in this market.

Regarding again the games/virtual goods market superdataresearch writes:

APAC is the biggest region with $8.7 billion in total virtual goods sales, with China”s $5.1 billion market leading the pack.

For comparision, the US makes a share of about 3 billion $ according to Tech Crunch/Inside Virtual Goods:

“The overall market for virtual goods in the US is headed towards $2.9 billion for 2012, according to the Inside Virtual Goods report. That’s up from $2.2 billion this year, and $1.6 billion in 2010.”

Here I found as a comparision the US meat market which seems to have a size of about 7 billion dollar.

In the meat market the work force comprises around 44000 people. So if one would make the ad-hoc assumption that the game and the meat markets are approximately equally labour intensive (which is actually an interesting question) then about 20000 people in the US would make their living in the US game market. Likewise worldwide this would give roughly 100000 people.

Any more precise data in this direction is welcome.

update Sept. 23, 2017:
According to a presentation by what looks like a virtual goods trading company called Swapster (the website at is currently blank) given at open day 2015 at Deutsche Börse Group; Contact person: Alexander Höptner:

“The virtual items market is estimated to surpass $52 billion in 2016, with a CAGR of >6 per cent and a monetisation rate of 2–5 per cent.”

They provide also some more estimations:

“The global games market is estimated to amount to $92.5 billion in 2015, with a year-on-year growth of 9 per cent.”


“The number of active gamer accounts
worldwide will amount to 2.4 billion in 2020.”

The presentation lists as Sources: Super Data Research – Virtual Goods Market Size 2014 – 2020E; NEWZOO Study, The Global Games Market 2015 – April 2015

Unfortunately I haven’t found direct links to this data on super data research.
Whatsoever – it seems the estimations of May 2015 for the global games market were according to super data research 74.2 billion US$. The blogs futurelab and serious game market have graphics of how the various segments of the global games super data research market estimations for 2015 look like.

when voting is on the mathstresstest

Friday, September 20th, 2013

The German Chancellery in Berlin

Do you think stable looking democracy in Germany could crumble in a nearer future? No?
Actually this could take place on sunday.


Hurries for humans in physis

Sunday, January 27th, 2013

I was asked to comment on a blog post by particle physicist Sabine Hossenfelder about open access, however I decided to comment first on her recent post Hurdles for women in physics.


stereographic lamp

Sunday, January 20th, 2013

stereographic lamp
As the title says: a lamp showing that the stereographic image of circles are circles (or straight lines). Done by students in a seminar on mathematical models.