Though the U.S. Constitution was ratified in 1788, its impact on our lives is as recent as today's news. Claims and counterclaims about the constitutionality of governmental actions are a habit of American politics. This document, which its framers designed to limit power, often has made political conflict inevitable. It also has accommodated and legitimized the political and social changes of a vibrant, powerful democratic nation. A product of history's first modern revolution, the Constitution embraced a new formula for government: it restrained power on behalf of liberty, but it also granted power to promote and protect liberty. The U.S. Constitution: A Very Short Introduction explores the major themes that have shaped American constitutional history: federalism, the balance of powers, property, representation, equality, rights, and security. Informed by the latest scholarship, this book places constitutional history within the context of American political and social history. As our nation's circumstances have changed, so has our Constitution. Today we face serious challenges to the nation's constitutional legacy. Endless wars, a sharply divided electorate, economic inequality, and immigration, along with a host of other issues, have placed demands on government and on society that test our constitutional values. Understanding how the Constitution has evolved will help us adapt its principles to the challenges of our age. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

COMPUTATIONAL MATERIALS CHEMISTRY: METHODS AND APPLICATIONS

Curtiss

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Springer India

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As a result of the advancements in algorithms and the huge increase in speed of computers over the past decade, electronic structure calculations have evolved into a valuable tool for characterizing surface species and for elucidating the pathways for their formation and reactivity. It is also now possible to calculate, including electric field effects, STM images for surface structures. To date the calculation of such images has been dominated by density functional methods, primarily because the computational cost of - curate wave-function based calculations using either realistic cluster or slab models would be prohibitive. DFT calculations have proven especially valuable for elucidating chemical processes on silicon and other semiconductor surfaces. However, it is also clear that some of the systems to which DFT methods have been applied have large non-dynamical correlation effects, which may not be properly handled by the current generation of Kohn-Sham-based density functionals. For example, our CASSCF calculations on the Si(001)/acetylene system reveal that at some geometries there is extensive 86 configuration mixing. This, in turn, could signal problems for DFT cal- lations on these systems. Some of these problem systems can be addressed using ONIOM or other "layering" methods, treating the primary region of interest with a CASMP2 or other multireference-based method, and treating the secondary region by a lower level of electronic structure theory or by use of a molecular mechanics method. ACKNOWLEDGEMENTS We wish to thank H. Jónsson, C. Sosa, D. Sorescu, P. Nachtigall, and T. -C.

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Books by Curtiss

See the best price to sell, buy, or rent books by Curtiss. BookScouter helps to compare book prices from 25+ online bookstores and 30+ buyback vendors with a single search.

COMPUTATIONAL MATERIALS CHEMISTRY: METHODS AND APPLICATIONS

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COMPUTATIONAL MATERIALS CHEMISTRY: METHODS AND APPLICATIONS