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2014 13- 17 F E B • C H I C AG O Call for Symposium Proposals Symposium proposals for the 2014 AAAS Annual Meeting are now being solicited. To submit a proposal, visit www.aaas.org/meetings. The deadline for submission is 23 April 2013. Meeting Global Challenges: Discovery and Innovation Scientific discovery and innovation are helping to drive solutions to current and future global challenges. Economic progress in every community worldwide has meanwhile become increasingly interdependent with advances in science and technology. Challenges related to ensuring sufficient food for a growing population, quality healthcare, renewable fuels, and a sustainable and enriching environment demand innovation and international dialogue. Addressing these challenges depends upon discoveries emerging from the convergence of physical, life, engineering, and social sciences in innovative ways that are most useful to society. In a weakened global economy, many countries have begun to limit their investments in the future. Yet, investments in innovations – including funding for education as well as basic and applied research – represent our best prospect for a sustainable environment and increased economic growth. Economists estimate, after all, that innovation in science and technology are the source of more than half of the economic growth in many countries. By increasing innovation in sustainable products and processes, world economies can continue to enhance human welfare across society. Innovation springs from the translation, production, and distribution of discovery and invention to society. In the contemporary world, this is not a linear process, but rather, a matrix of interactions. Societies, with support from public and private sectors and institutions, struggle to integrate the necessary disciplines and interests into this matrix. Within the scientific and engineering community, we need to better integrate different disciplines and voices into a consensus supporting innovation. Developed and developing countries that accomplish this will become the economies of the future. At the same time, it is imperative that we work in ways that are transparent and open to a diversity of contributors and ideas. Assessing risk versus benefit in adopting an innovation is complex and depends upon an open dialogue. Only then will we realize the promise of furthering scientific discovery and innovation to meet pressing global challenges and improve quality of life. Call for Poster Submissions Online entries will be accepted at www.aaas.org/meetings beginning 14 May 2013. PHOTO: ©CESAR RUSS PHOTOGRAPHY
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CONTENTS EDITORIAL 737 Designing Sc
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736 EDITED BY STELLA HURTLEY The Bu
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CREDITS: (TOP LEFT) TOM KOCHEL; (RI
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CREDIT: WIKIMEDIA COMMONS and orbit
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CREDITS (TOP TO BOTTOM): EOS/UNIVER
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CREDIT: P. CARRIL/ESA European NEWS
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CREDIT: JOHN MACDOUGALL/AFP/GETTY I
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CREDIT: TITUS ET AL., SCIENCE TRANS
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CREDITS (TOP TO BOTTOM): ISTOCKPHOT
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CREDIT: NATIONAL SCIENCE FOUNDATION
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CREDITS (CLOCKWISE FROM TOP LEFT):
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Sensing cytosolic danger ture capit
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TECHNICAL COMMENT 757-c Fig. 2. Rel
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policy ideas” could be rectifi ed
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ARMS CONTROL Beyond Arms-Control Mo
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A Field et al. B Partial modern tre
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depend on the binding strength of t
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increasing the accuracy of the meas
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Structural Biological Materials: Cr
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increasing toughness. These methods
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experimental work has been conducte
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How do we answer this trilemma? As
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Fig. 2. Schematic and characterizat
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REPORTS greatly eases the requireme
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dynamically, therefore, Sr3Ru2O7 ca
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16. N. P. Ong, Phys. Rev. B 43, 193
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low-energy break in IC 443 and 21s
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