The 20th Spring School on Particles and Fields Apl. 1-4, 2007 National Taiwan University,Taipei, Taiwan http://www.phys.sinica.edu.tw/~ss2007 The Second Bulletin The 20th Taiwan Spring School on Particles and Fields will be held at Department of Physics, National Taiwan University, Taipei during April 1-4, 2007. The purpose to to introduce to graduate students recent progress on important and hot topics in particles and fields. 1. Registration If you have not yet registered, please do it as soon as possible via the school home page. Please report to the registration desk before 12:00 noon on Apl. 1 in order to reserve your lunch box. If you arrive after 12:00 noon, you may not have a lunch box for the first day. 2. Recitations As in the 19th school, we shall organize one-hour recitations in the afternoons of Apl. 2 and 3. Students are encouraged to participate these recitations, at which they can raise questions or discuss physics with the lecturers. To help communication between lecturers and students, we have invited several coordinators as below Lecturers Titles Coordinators Andre Neutrino Physics Shao-Long Chen Luca Cosmology Wolung Lee Xerxes Supersymmetry Otto Kong Gary String Phenomenology Chuan-Tsung Chan, Wen-Yu Wen 3. Special Seminar Spring School provides an opportunity for colleagues from different subfields to meet each other, and an opportunity to share interesting works appearing in the past year. As an initiative, Prof. Kin-Wang Ng’s paper published in PRL has been selected. Prof. Ng will report this work as a special seminar in the afternoon of Apl. 1 with the title Probing the Universe with cosmic microwave background 4. Chairmen Chairmen during the Spring School have been assigned as follows Apl.1 Apl.2 Apl.3 Apl.4 String(Lin) Neutrino(Keum) Cosmology(C.M.Chen) Cosmology(S.Lee) Cosmology(Gu) String(Ho) SUSY(Chiang) Neutrino(J.Lee*) SUSY(Cheung) Neutrino(Chang) SUSY(C.H.Chen) String(Furuuchi) * to be confirmed 5. Organization Committee Meeting An Qrganization Committee meeting will be called during the luch time on Apl. 3, at which the host of next Spring School will be decided, and a program committee for the future schools will be formed. All colleagues are encouraged to attend this Organization Committee meeting. 6. Students' Support Students' accommodation at guest housees and transportation from outside of Taipei city will be supported.