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A Computer Previous Page | Contents | Zoom in | Zoom out | Front Cover | Search Issue | Next Page M S BE aG F CONTENTS ABOUT THIS ISSUE Growing interest in cloud computing also raises the question of cost/benefit. In this issue, we feature an article describing a federated, open-source cloud platform that lowers the entry barriers to systems and applications research communities, an economic model for determining whether to lease or buy storage, and an analysis of energy consumption and battery life in mobile devices offloading computation to the cloud. We also look at puzzle-based learning, ethical codes of conduct in the legal realm, and the linkage of software development and business strategy. COMPUTING PRACTICES 20 Puzzle-Based Learning for Engineering and Computer Science Nickolas Falkner, Raja Sooriamurthi, and Zbigniew Michalewicz To attract, motivate, and retain students and increase their mathematical awareness and problem-solving skills, universities are introducing courses or seminars that explore puzzle-based learning. The authors introduce and define this learning approach, describe course variations, and highlight early student feedback. PERSPECTIVES 29 Using Codes of Conduct to Resolve Legal Disputes Peter Aiken, Robert M. Stanley, Juanita Billings, and Luke Anderson In the absence of other published standards of care, it is reasonable for contractual parties to rely on an applicable, widely available code of conduct to guide expectations. COVER FEATURES 35 Open Cirrus: A Global Cloud Computing Testbed Arutyun I. Avetisyan, Roy Campbell, Indranil Gupta, Michael T. Heath, Steven Y. Ko, Gregory R. Ganger, Michael A. Kozuch, David O’Hallaron, Marcel Kunze, Thomas T. Kwan, Kevin Lai, Martha Lyons, Dejan S. Milojicic, Hing Yan Lee, Yeng Chai Soh, http://computer.org/computer For more information on computing topics, visit the Computer Society Digital Library at www.computer.org/csdl. Ng Kwang Ming, Jing-Yuan Luke, and Han Namgoong Open Cirrus is a cloud computing testbed that, unlike existing alternatives, federates distributed data centers. It aims to spur innovation in systems and applications research and catalyze development of an open source service stack for the cloud. 44 To Lease or Not to Lease from Storage Clouds Edward Walker, Walter Brisken, and Jonathan Romney Storage clouds are online services for leasing disk storage. A new modeling tool, formulated from empirical data spanning many years, lets organizations rationally evaluate the benefit of using storage clouds versus purchasing hard disk drives. 51 Cloud Computing for Mobile Users: Can Offloading Computation Save Energy? Karthik Kumar and Yung-Hsiang Lu The cloud heralds a new era of computing where application services are provided through the Internet. Cloud computing can enhance the computing capability of mobile systems, but is it the ultimate solution for extending such systems’ battery lifetimes? RESEARCH FEATURE 57 Linking Software Development and Business Strategy through Measurement Victor R. Basili, Mikael Lindvall, Myrna Regardie, Carolyn Seaman, Jens Heidrich, Jürgen Münch, Dieter Rombach, and Adam Trendowicz The GQM + Strategies approach extends the goal/question/metric paradigm for measuring the success or failure of goals and strategies, adding enterprise-wide support for determining action on the basis of measurement results. An organization can thus integrate its measurement program across all levels. A Computer Previous Page | Contents | Zoom in | Zoom out | Front Cover | Search Issue | Next Page M S BE aG F
A Computer Previous Page | Contents | Zoom in | Zoom out | Front Cover | Search Issue | Next Page M S BE aG F IEEE Computer Society: http://computer.org Computer: http://computer.org/computer computer@computer.org ___________ IEEE Computer Society Publications Office: +1 714 821 8380 Cover image © Lolaferari Dreamstime.com 6 The Known World Utter Chaos David Alan Grier 10 32 & 16 Years Ago Computer, April 1978 and 1994 Neville Holmes NEWS 13 Technology News Will HTML 5 Restandardize the Web? Steven J. Vaughan-Nichols 16 News Briefs Linda Dailey Paulson MEMBERSHIP NEWS 66 IEEE Computer Society Connection 69 Call and Calendar COLUMNS 76 AI Redux Probabilistic Analysis of an Ancient Undeciphered Script Rajesh P.N. Rao 81 Software Technologies When TV Dies, Will It Go to the Cloud? Karin Breitman, Markus Endler, Rafael Pereira, and Marcello Azambuja Flagship Publication of the IEEE Computer Society April 2010, Volume 43, Number 4 84 Invisible Computing Questioning Invisibility Leah Buechley 87 Education Cutting Across the Disciplines Jim Vallino 90 Security Integrating Legal and Policy Factors in Cyberpreparedness James Bret Michael, John F. Sarkesain, Thomas C. Wingfield, Georgios Dementis, and Gonçalo Nuno Baptista de Sousa 96 The Profession Computing a Better World Kai A. Olsen DEPARTMENTS 4 Elsewhere in the CS 71 Computer Society Information 72 Career Opportunities 74 Advertiser/Product Index 93 Bookshelf Reuse Rights and Reprint Permissions: Educational or personal use of this material is permitted without fee, provided such use: 1) is not made for profit; 2) includes this notice and a full citation to the original work on the first page of the copy; and 3) does not imply IEEE endorsement of any third-party products or services. Authors and their companies are permitted to post their IEEE-copyrighted material on their own Web servers without permission, provided that the IEEE copyright notice and a full citation to the original work appear on the first screen of the posted copy. Permission to reprint/republish this material for commercial, advertising, or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to the IEEE Intellectual Property Rights Office, 445 Hoes Lane, Piscataway, NJ 08854-4141 or pubs-permissions@ieee.org. _______________ Copyright © 2010 IEEE. All rights reserved. Abstracting and Library Use: Abstracting is permitted with credit to the source. Libraries are permitted to photocopy for private use of patrons, provided the per-copy fee indicated in the code at the bottom of the first page is paid through the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923. IEEE prohibits discrimination, harassment, and bullying. For more information, visit www.ieee.org/ ______________________ web/aboutus/whatis/policies/p9-26.html. A Computer Previous Page | Contents | Zoom in | Zoom out | Front Cover | Search Issue | Next Page M S BE aG F
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