Professor Yaacov Bar- Siman-Tov, a long-time international relations professor at the Hebrew University in Jerusalem, died Monday morning. He suffered from a cardiac arrest, the university said. He was 67. Bar-Siman- Tov, an expert in international conflict management and resolution, focused on the barriers to peace in the Israeli-Palestinian conflict and Israel’s disengagement from the Gaza Strip. He founded the Swiss Center for Conflict Research, Management and Resolution at Hebrew University, and headed the masters program from 1999-2009 and taught in it until this year. He also headed the think tank at the Jerusalem Institute for Israel Studies.Bar-Siman-Tov’s funeral will be held at Kibbutz Kiryat Anavim on Tuesday at 4 p.m., the university said.