David Patterson is a professor of Holocaust studies at the University of Texas at Dallas. He is an expert on the Holocaust and serves as an adviser to two U.S. Holocaust museums.

Julian Henri Preisler is an archivist and genealogist in the Eastern Panhandle region of West Virginia. He formerly ran a website about West Virginia Jewish history.

Read an November 2006 commentary from Rabbi Jeffrey Kurtz-Lendner of New Orleans, published in Smartphone & Pocket PC Magazine, about how wireless technology helped him keep in touch with his congregation in the weeks after Katrina.

Sharon Miller is the principal of Ben Gamla Charter School in Hollywood, Fla., the first publicly funded Hebrew-language school in the U.S.

Jack Kugelmass is an anthropology professor at the University of Florida in Gainesville, where he is also director of its Jewish studies center. He specializes in American and European Jewry, Israel and Jews in New York.

Jonathan Hess is director of the Carolina Center for Jewish Studies at the University of North Carolina at Chapel Hill. Its faculty members are drawn from the humanities and social sciences.

Andrea Greenbaum is an associate professor of English at Barry University in Miami Shores, Fla. She is the editor of Jews of South Florida and is also an expert on Jewish graphic novels.

Rabbi Martin Beifield Jr. leads Congregation Beth Ahabah, a Reform synagogue in Richmond, Va. He is an expert in Jewish-Christian relations and the impact of the Holocaust.

David Ruderman is director of the Center for Advanced Judaic Studies at the University of Pennsylvania, where he is also a professor of modern Jewish history. Contact 215-238-1290.