Sunday, January 27 AN INTERNATIONAL three-day youth congress will open at Yad Vashem at 8.30 a.m., with the participation of young people from more than 60 countries and five continents. Participants aged 16-20 will include Christians, Jews, Muslims and Buddhists. They will join in shaping future Holocaust remembrance and its importance to coming generations. The Congress, under the patronage of UNESCO, will be devoted to the study of the Holocaust and discussions of its universal significance. Tuesday, January 29 TO MARK the fifth anniversary of the flight and tragic ending of the Columbia space shuttle, whose crew included Israel's pioneer astronaut Ilan Roman, the Department of Geophysics and Planetary Sciences at Tel Aviv University will host a conference with the participation of NASA and other space experts. The conference will be held in the Lev Hall of the Physics Building on the TAU campus from 8.45 a.m. THE ISRAEL Association of Organizational Development (IPPA), will mark its 20th anniversary with a two-day conference at Herzliya's Sharon Hotel. Among the subjects to be discussed will be the reorganization of the Israel Police and the process of attitudinal change from violence to tolerance and patience. KESEM, a member of the Excellence Nessua Group, is hosting a conference for investment consultants and portfolio managers at the Dan Tel Aviv Hotel, 99 Hayarkon Street, at 3.30 p.m. For details and registration call 03-753-2019 (Hebrew speakers) or 03-753-6837 (for English speakers). THE ACADEMIC Business Club at Tel Aviv University will host a discussion on Quality of the Environment - The Greatest Challenge of the 21st Century: Environmental Strategies as a Key to Business Success. The event will take place at 7 p.m. For full details and registration call: (03) 640-6401. Wednesday, January 30 ISRAELI AND Palestinian Strategic Options vis-Ã -vis Gaza is the topic of a debate sponsored by the Israel-Palestine Center for Research and Information as part of the Afternoons with IPCRI Series. The event will be held at Jerusalem's Tantur Ecumenical Seminary at 3 p.m. Sunday, February 3 MANY CONFERENCES this year will reflect Israel's 60th anniversary, but few will be as meaningful as the AACI Seniors Conference at Netanya's Blue Bay Hotel. Several of the participants were members of Machal, the Hebrew acronym for Mitnadvei Hutz L'Aretz (foreign volunteers) in the War of Independence, and either remained in Israel after the war or returned some years later to make their homes in Israel. Veterans of the War of Independence and later conflicts will share their memories. In addition to veterans of American and Canadian background, there will also be Machalniks of South African background among the speakers. Monday, February 4 THE GOVERNMENT and the Citizen on the Internet: Revolution, Alienation or Connection? The issues will be discussed at 2 p.m. in room 405 of the Recanati Building on the TAU campus. For further details e-mail: firstname.lastname@example.org. Tuesday, February 5 TO MARK the 50th anniversary of the passing of writer, editor and journalist Ben-Zion Katz, the Jabotinsky Institute will at 7 p.m. host a symposium at Tel Aviv's Beit Sokolov, 4 Kaplan Street. Several academics will discuss issues that were pertinent to Katz. Topics will include the sensationalism of truth, a Jewish journalist in Tsarist Russia, Yiddish journalism and the Emil Zola of the 1930s. Thursday, February 7 A Seminar on the Second Lebanon War and the lessons to be learned from it will be held at Beit Brenner, Ramat Efal, from 9.30 a.m. For details call Yossi Fogel at (052) 259-9004. Monday, February 11 A SYMPOSIUM on the secret contacts between Israel and Morocco will be held at 6.15 p.m. in TAU's Brender Law Faculty Building to mark the publication of Shmuel Segev's book, The Moroccan Connection. Sunday, February 17 A MODEL United Nations debate will be a three-day event, opening at the International American School in Even Yehuda at 8.45 a.m. in the presence of a large number of genuine diplomats whose children attend the school. THE JERUSALEM Institute for Market Studies (JIMS) is hosting Gabriel Stein of London's Lombard Street Research, Inc. Stein will be speaking about "Inflation Targets and the Mandates of Central Banks." The event is part of JIMS's public lecture series. For further information and registration call (02) 561-1689 or e-mail email@example.com.