The Tests Of Time

The Bible affirms in a number of locations that God has always been and always will be present. Why then does God who exists in eternity past and into eternity future present the words "in the beginning", to us, what beginning?

The development of physical theory is one of our greatest intellectual achievements. Its products--the currently prevailing theories of physics, astronomy, and cosmology--have proved themselves to possess intrinsic beauty and to have enormous explanatory and predictive power. This anthology of primary readings chronicles the birth and maturation of five such theories (the heliocentric theory, the electromagnetic field theory, special and general relativity, quantum theory, and the big bang theory) in the words of the scientists who brought them to life. It is the first historical account that captures the rich substance of these theories, each of which represents a fascinating story of the interplay of evidence and insight--and of dialogue among great minds. Readers sit in with Copernicus, Kepler, and Galileo as they overturn the geocentric universe; observe the genius of Faraday and Maxwell as they "discover" the electromagnetic field; look over Einstein's shoulder as he works out the details of relativity; listen in as Einstein and Bohr argue for the soul of quantum mechanics in the Completeness Debate; and watch as Hubble and others reveal the history of the universe. The editors' approach highlights the moments of discovery that rise from scientific creativity, and the presentation humanizes the scientific process, revealing the extent to which great scientists were the first to consider the philosophical implications of their work. But, most significantly, the editors offer this as their central thesis: although each was ushered in by a revolution, and each contains counterintuitive elements that delayed its acceptance, these five theories exhibit a continuous rational development that has led them to a permanent place in the worldview of science. Accessible to the general reader yet sufficiently substantive that working scientists will find value in it, The Tests of Time offers an intimate look into how physical theory has been developed, by the brilliant people who have developed it.

Testing for a Unit Root is now an essential part of time series analysis but the literature on the topic is so large that knowing where to start is difficult even for the specialist. This book provides a way into the techniques of unit root testing, explaining the pitfalls and nonstandard cases, using practical examples and simulation analysis.

Testing for a unit root is now an essential part of time series analysis. This volume provides a critical overview and assessment of tests for a unit root in time series, developing the concepts necessary to understand the key theoretical and practical models in unit root testing.

Tests of Time brings us fourteen witty and elegant essays by novelist and literary critic William H. Gass, "the finest prose stylist in America" (Steven Moore, Washington Post). Whether he's exploring the nature of narrative, the extent and cost of political influences on writers, or the relationships between the stories we tell and the moral judgments we make, Gass is always erudite, entertaining, and enlightening.

Which time series test should researchers choose to best describe the interactions among a set of time series variables? Providing guidelines for identifying the appropriate multivariate time series model to use, this book explores the nature and application of these increasingly complex tests.

Testing is one of the most controversial of all state and federal educational policies. The effects of testing are quite ambiguous. The same test may lead to different consequences in different circumstances, and teachers may use very different strategies to prepare students for tests. Although most experts agree that mandatory testing leads to teaching to the test, they disagree about whether it leads to meaningless drill, wasted time, de-professionalizing teachers, and demotivating students, or to more challenging and thoughtful curricula, more engaging teaching, increased student motivation, and increased accountability. To help sort through this ambiguity and provide a firmer basis for decisions, The Ambiguity of Teaching to the Test: Standards, Assessment, and Educational Reform offers a hard look at the effects of state testing, and thoroughly examines the ambiguity of test preparation and how test preparation practices are influenced by what teachers know and the leadership coming from the school and district. Drawing on data from a three-year study of New Jersey's testing policy in elementary mathematics and science, it helps to explain the variety of ways that teachers modify their teaching in response to state tests, raises important questions, and offers useful guidance on how state policymakers and local and district school administrators can implement policies that will improve educational equity and performance for all students. It also offers an in-depth analysis of classroom practices that should inform teachers and teacher educators whose goal is to meaningfully implement conceptually based teaching practices. This comprehensive look at the statewide variation in testing practice features: *a data-based, non-ideological treatment of how testing affects teachers, in a field characterized by ideologically driven beliefs and by anecdotes; *an extensive and well-integrated combination of qualitative and quantitative data sources that provide a statewide overview, as well as an in-depth analysis of teachers and classrooms; *a careful analysis of the variety of forms of teaching to the test; and *a multilevel exploration of how a variety of personal and leadership factors can influence teaching to the test. This is an important book for researchers, professionals, and students in educational testing, educational policy, educational administration, mathematics and science education, educational reform, and the politics and sociology of education. It will also prove useful for state policymakers, school and district leaders, and teacher educators and curriculum specialists who are making decisions about how to design and respond to new testing systems.