Summer 2009—Issue 15. 4

CROSSROADS STAFF

EDITOR IN CHIEF:

Jerry Guo, Yale University

MANAGING EDITOR:

Justin Solomon, Stanford University

COPY EDITOR:

Joe Nyiri, Niagara University

ASSOCIATE EDITORS:

Malay Bhattacharyya, Indian Statistical Institute Andrew David, University of

Minnesota Twin Cities

Aris Gkoulalas-Divanis, University of Thessaly Dan Goldberg, University of

Southern California

Chris Jordan, Dalhousie University

Ryan K. L. Ko, Nanyang Technological University Martin Margo, San Diego State University Sumit Narayan, University of Connecticut Anna Ritchie, University of Cambridge

Jarrod Trevathan, James Cook University INSTITUTIONAL REVIEWERS:

Ernest Ackermann, Mary Washington College Peter Chalk, London Metropolitan University Nitesh Chawla, University of Notre Dame

José Creissac Campos, University of Minho Ashoke Deb, Memorial University of Newfoundland

Steve Engels, University of Toronto

João Fernandes, University of Minho

Chris Hinde, Loughborough University

Michal Krupka, Palacky University

Piero Maestrini, ISTI-CNR, Pisa

José Carlos Ramalho, University of Minho Suzanne Shontz,

Pennsylvania State University

Roy Turner, University of Maine

Ping-Sing Tsai, University of Texas—

Pan American

Andy Twigg, University of Cambridge

Joost Visser, Software Improvement Group Tingkai Wang, London Metropolitan University Charles Won, California State University, Fresno

GRAPHICS EDITOR:

Salik Syed, Stanford University

ONLINE EDITOR:

Gabriel Saldaña, Instituto de Estudios Superiores de Tamaulipas (IEST), Mexico

ASSOCIATE COPY EDITORS:

David Chiu, Ohio State University

Scott DuVall, University of Utah

Leslie Sandoval, University of New Mexico SPANISH EDITOR:

Pablo Cayuela, Universidad Tecnológica Nacional, Facultad Regional Córdoba, Argentina

OFFERING #XRDS0154

ISSN#: 1528-4981 (PRINT)

COLUMNS & REVIEWS

INTRODUCTION .................................... 2 by Justin Solomon, Managing Editor

LIBRARYTHING:

ANINTERVIEW WITHTIMSPALDING .................... 3 by Anna Ritchie

FEATURES

SUPERCOMPUTERS: PAST, PRESENT, AND THE FUTURE by Sumit Narayan 7

A COMPUTER SCIENTIST’S INTRODUCTORY GUIDE TO BUSINESS PROCESS MANAGEMENT (BPM)

by Ryan K. L. Ko

11

COURIER PROBLEMS by Malay Bhattacharyya 19

AN OVERVIEW OF PRIVACY PRESERVING DATA MINING

by Aris Gkoulalas-Divanis and Vassilios S. Verykios

23

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