David Hafemeister is a physics professor at California Polytechnic State University, but this academic year he's at Stanford University studying ways to keep the Comprehensive Test Ban Treaty viable for the U.S. Senate to consider ratifying. Jonathan Farley, a professor in the mathematics and computer science deparment at the University of the West Indies, is here this year as well, conducting a mathematical analysis of counterterrorism operations. They are among seven science fellows now visiting the Center for International Security and Cooperation (CISAC), part of the Freeman Spogli Institute for International Studies at Stanford.

With fellowships in the sciences and social sciences, CISAC, directed by political science Professor Scott Sagan, brings top scholars to campus to find solutions to complex international problems.

This year's fellows "are a select and exciting set of scholars doing innovative work on important issues of international security--which now includes homeland security," said Lynn Eden, CISAC's associate director for research. "All of us at CISAC are very much looking forward to having our new crew on board."

The other CISAC science fellows are:

• Manas Baveja and Yifan Liu, both doctoral candidates at the Institute for Computational and Mathematical Engineering at Stanford, who use mathematical models to study homeland security;
• Chaim Braun of Altos Management Partners, who is working on a United Nations nuclear energy project;
• Belkis Cabrera-Palmer, a physics doctoral candidate from Syracuse University, who is studying nuclear energy issues in Latin America; and
• Sonja Schmid, a lecturer in Stanford's Science, Technology and Society Program, who is working on a book aimed at understanding the decisions that produced and sustained the civilian nuclear energy program in the Soviet Union from the 1950s through the 1980s.

Charles Perrow, professor emeritus of sociology from Yale University, is among seven pre- and postdoctoral fellows in social science disciplines who are also visiting CISAC. Perrow is working on a project to reduce homeland security vulnerabilities. CISAC's other postdoctoral social science fellows are:

• Tarak Barkawi, a lecturer at the Centre for International Studies at the University of Cambridge in England, who is examining why small wars have big consequences, and
• Alex Montgomery, a doctoral candidate in political science at Stanford, whose project deals with U.S. post-Cold War nuclear counterproliferation strategies.

CISAC's predoctoral fellows in social science are:

• Dara Cohen, a doctoral candidate in political science at Stanford, who will examine the efficacy of post-9/11 domestic security legislation;
• Matthew Rojansky, a law student at Stanford, whose project explores the legitimacy of international institutions and legal instruments in the war on terror;
• Jacob Shapiro, a doctoral candidate in political science at Stanford, whose project looks at the organizational consequences of terrorist motivation; and
• Jessica Stanton, a doctoral candidate in political science at Columbia University, who is examining compliance with international laws of war during civil war.

CISAC also is hosting Robert Carlin of the Korean Peninsula Energy Development Organization, a visiting scholar whose project addresses U.S.-North Korea relations, and Laura Donohue, who is writing a book, Counterterrorism and the Death of Liberalism, while completing a law degree at Stanford Law School. Patrick Roberts, who comes to Stanford from the University of Virginia, where he earned a doctorate in politics, will examine bureaucratic autonomy and homeland security reorganization.