You can find a table of countries whose citizens require/do not require visas to enter Germany here. But please check with the German embassy in your country to be sure.
Getting to RSS 2013
The best way to get to TU Berlin from elsewhere in the world is described here.
Below is a map, indicating public transportation (S-Bahn, U-Bahn, and bus). The conference venue is indicated by the letter "H" in the map (Straße des 17. Juni 135, 10623 Berlin), workshops will be held in the building indicated by MAR (Marchstraße 23, 10587 Berlin).
Public transportation is excellent in Berlin and during business hours the most time-efficient means of transportation. You can find information about busses, subways (U-Bahn), local trains (S-Bahn), and street cars (Tram) on this web site. We highly recommend downloading a free Berlin public transport app to your smart phone prior to your arrival (iOS, Android).
Please note that free public transporation will be included with your full conference registration from June 24 to June 28, 2013. Your conference name tag will serve as a ticket.
In June the average high temperature is 21°C (71°F) with an average of seven rainy days. For more information about the weather, please check here.