MONDAY Merchant Marine Minister Giorgos Voulgarakis visits London. The National Technical University of Athens hosts a seminar on «New Challenges and Opportunities in the Management of Water Resources: The Centrality of Public Participation,» at 11 a.m. For details, log on to The Hellenic Industrial Property Orrganization (OBI) hosts a conference on «Protection of Inventions – Technological Information,» at 9.30 a.m. at the National Technical University of Athens. For details, tel 210.618.3500 or log on to An international exhibition and conference on «Sales and Marketing» begins at 10 a.m. at the Athinais conference center. To tomorrow. For details, tel 210 92 21 254 or log on to The third national congress on «Hydrogen Technologies» begins at the University of Patras. To tomorrow. For details, tel 2610.965.264 or log on to TUESDAY The Thessaloniki Chamber of Commerce and Industry (EBETH) is hosting a conference on «The Role and the Activities of the European Ombudsman. His Contribution to Greek Business,» at 6 p.m. at its premises in Thessaloniki. European Ombudsman Nikiforos Diamandouros will be the keynote speaker. For details, tel 2310-370.180-1 or log on to The Hellenic Management Association (EEDE) hosts a conference on «The new Law on Limited Companies (SA)» at 5.30 p.m. at the Theodoros Karatzas Amphitheater of the National Bank. For details, tel 210.211.2000 or log on to European Commission Repesentation in Greece hosts a press conference to present the Commission’s proposals on internal market reforms. At 5.15 p.m. at its premises (8 Amalias). WEDNESDAY Alpha Bank employees launch a 48-hour strike opposing the accession of bank’s fund into the Single Insurance Fund for Bank Employees (ETAT). EFG Eurobank Ergasias holds an extraordinary general meeting. THURSDAY The Institute of Communication hosts a seminar on «Event Management,» at 9.30 a.m. at the Central Hotel in Plaka. To Friday. For details, tel 210.331.8065-7 or log on to The bank workers’ federation (OTO) stages a three-hour work stoppage from 12.15 p.m. The sixth international exhibition «Polis 2007» on local government, public and social sector and private enterprises opens its doors at the Thessaloniki International Exhibition Center. To Sunday. For details, tel 2310.291.548 or log on to FRIDAY The National Confederation of Greek Commerce (ESEE) holds a conference on «Greek Commerce: From Today to Tomorrow,» at the European Cultural Center in Delphi. To Sunday. For details, log on to The Center for the Assessment of Natural Hazards and Proactive Planning hosts a conference on «Water Conservation in Urban Water Systems,» at 9.15 a.m. at the National Technical University of Athens. For details, tel 210.772.4064 or log on to The Mediterranean SOS Network hosts an International conference on «Civil Society, Environment & Sustainable Development,» at 9 a.m. at Panteion University. For details, tel 210.822.8795 or log on to