By summerstudent Gia Van Tran > Hop on the RE train at 7h12. I take out my pen and notebook to write down what I did yesterday and stupid mistakes to avoid. Then, I note down my daily tasks and some papers that would be nice to read when I was not in experiment time. That should take me at most 5 minutes to finish, so I still have around 50 minutes of commuting time.Read More →
by summerstudent Geunwoo Kim Before coming to Berlin, I had never spoken English. In South-Korea, it is not easy to have a chance to speak English in general except for special cases. I was also a student who had never had a chance to speak English. When I applied for the HZB Summer Student Program in February 2022, I was worried about ‘Can I communicate well?’ and ‘Can I do my research well?’ When I received an email from HZB that I was selected for the summer student program, I was happy and worried. The problem was that I had never spoken English. After finishingRead More →
A photostory at the end of this text reports about a special workshop at BESSY II. It was mid of november, in the night from sunday to monday, when a couple of accelerator scientists from MAX IV, BESSY II, CERN, KARA at KIT and DELTA from TU Dortmund gathered in the control room of BESSY II. They wanted to explore the so called two orbit or TRIBS modus in which one synchrotron could deliver two different sorts of light pulses. But let’s start with a short introduction: A Synchrotron Lightsource is a wonderful toolbox for doing research: it produces brilliant light pulses mostly in theRead More →
If you try to search for “PSO” abbreviation in wiki you may find Pacific Symphony Orchestra or Phase-shift oscillator. However, my project at HZB is about neither music nor electricity, but mathematics. For almost a month here I have been working on an algorithm called Particle Swarm Optimization method and I would like you to have some impression of it. Optimization Actually, the definition of optimization problem is quite simple. One has a function of n-variables f(x1, …, xn) and seeks to find such values of variables that give minimum to the function. However, the solution is not that simple, because in general you cannotRead More →