THURSDAY University professors and students stage a demonstration at noon in front of Athens University. Health Minister Dimitris Avramopoulos holds a press conference at 11 a.m. World Breastfeeding Week. President of the Greek Bid Committee for the XVII Mediterranean Games Isidoros Kouvelos holds a press conference at noon at the Greek Olympic Committee in Halandri. Finance Minister Giorgos Alogoskoufis to inaugurate at 8 p.m. the new building of the Athens Exchange at 11 Athinon, Athens. The Greek Society for Terminology hosts the sixth conference on «Greek Language and Terminology,» at 6 p.m. at the Univ. of Athens.To Saturday. Tel 210.932.3243 or log on to www.eleto.gr. Tourism Minister Aris Spiliotopoulos to open the 23rd International Tourism exhibition Philoxenia 2007 at the Helexpo fairgrounds in Thessaloniki. The exhibition will run through Sunday. Tel 2310.291.293. FRIDAY The seventh KEM Franchise exhibition of Northern Greece opens at 6 p.m. at the Hyatt Regency Hotel in Thessaloniki. To Sunday. For details, log on to www.franchise-success.gr. Technical Chamber of Magnesia hosts a conference on «Thessaly-Epirus Railway Connections,» at its offices. To Tomorrow. For details log on to www.tee.gr. The Thiseion to Piraeus section of the Athens-Piraeus Electric Railway (ISAP) will not operate from 10 p.m. until the end of the shift due to repair work. Cidesco Hellas, member of the World Beauty Therapy Association, is hosting its 30th international congress entitled «Beauty and Health,» at the Holiday Inn Hotel. To Sunday. For details, log on to www.cidesco.com or call 210.682.8708. State university rectors to meet in Tripolis. Education Minister Evripidis Stylianidis to attend. To tomorrow. Municipal workers stage a 24-hour strike over social security and financial demands. At 11 a.m. they will hold a protest march to the Interior Ministry. SATURDAY PASOK convention. To tomorrow.