Fuel Efficient Computation in Passive Self-Assembly

In this paper we show that passive self-assembly in the context of the tile self-assembly model is capable of performing fuel efficient, universal computation. The tile self-assembly model is a premiere model of self-assembly in which particles are modeled by four-sided squares with glue types assigned to each tile edge. The assembly process is driven by positive and negative force interactions between glue types, allowing for tile assemblies floating in the plane to combine and break apart over time. We refer to this type of assembly model as passive in that the constituent parts remain unchanged throughout the assembly process regardless of their interactions. A computationally universal system is said to be fuel efficient if the number of tiles used up per computation step is bounded by a constant. Work within this model has shown how fuel guzzling tile systems can perform universal computation with only positive strength glue interactions. Recent work has introduced space-efficient, fuel-guzzling universal computation with the addition of negative glue interactions and the use of a powerful non-diagonal class of glue interactions. Other recent work has shown how to achieve fuel efficient computation within active tile self-assembly. In this paper we utilize negative interactions in the tile self-assembly model to achieve the first computationally universal passive tile self-assembly system that is both space and fuel-efficient. In addition, we achieve this result using a limited diagonal class of glue interactions

An equivalence result for VC classes of sets

Let R and θ be infinite sets and let A # R × θ. We show that the class of projections of A onto R is a Vapnik–Chervonenkis (VC) class of sets if and only if the class of projections of A onto θ is a VC class. We illustrate the result in the context of semiparametric estimation of a transformation model. In this application, the VC property is hard to establish for the projection class of interest but easy to establish for the other projection class

The Potential Revenue from Financial Transactions Taxes

This joint report by CEPR and the Political Economy Research Institute (University of Massachusetts, Amherst) gives an estimate of $177-354 billion in revenue that could be raised by taxing financial transactions in the United States.financial taxes, financial transactions, economic crisis, financial crisis

The Potential Revenue from Financial Transactions Taxes

The economic crisis of the last two years has led to serious concerns about the sharp growth in the federal government’s fiscal deficit as well as the government’s overall debt burden as a share of total U.S. GDP. Many analysts also believe that an excessive share of the economy’s resources is being consumed by the financial sector. A financial transactions or trading tax is a policy tool that can address both issues: raising a substantial amount of revenue and reducing the size of financial trading in the U.S. economy relative to the economy’s level of productive activity. This paper calculates the revenue potential from a set of financial trading taxes. It updates an earlier set of calculations, using a similar methodology.

Identification and estimation in a correlated random coefficients binary response model

We study a linear index binary response model with random coefficients BB allowed to be correlated with regressors X. We identify the mean of the distribution of B and show how the mean can be interpreted as a vector of expected relative effects. We use instruments and a control vector V to make X independent of B given V. This leads to a localize-then-average approach to both identification and estimation. We develop a √n-consistent and asymptotically normal estimator of a trimmed mean of the distribution of BB, explore its small sample performance through simulations, and present an application

Leaders of Reform: Progressive Republicans in Kansas, 1900-1916

Robert Sherman La Forte was professor of history at the University of North Texas, where he taught for thirty years. In addition to this book, he coauthored three books on World War II history and the authorized history of the University of North Texas. With a New Foreword by Charles Delgadillo. Charles Delgadillo is lecturer in history at the California State Polytechnic University, Pomona, and Norco College, in California. He is the author of Crusader for Democracy: The Political Life of William Allen White.This Kansas Open Books title is funded by a grant from the National Endowment for the Humanities and the Andrew W. Mellon Foundation Humanities Open Book Program.In Leaders of Reform Robert Sherman La Forte examines the intricacies of shifting factions within the state majority party over a two decade period, from the Boss-Busters and political machines of the early 1900s through the formation of a new party behind Theodore Roosevelt in 1913. He discusses the motives, activities, accomplishments, and failures of the progressive Republicans. He provides excellent vignettes of major leaders such as William Allen White, Arthur Capper, Joseph L. Bristow, and Charles Curtis, as well as lesser-known characters such as Walter Roscoe Stubbs, Edward H. Hoch, and Cy Leland, Jr. In providing a detailed analysis of virtually all Kansas progressive Republican leaders during the era, La Forte has made a valuable contribution to both state and national political history

Leaders of Reform: Progressive Republicans in Kansas, 1900-1916

In Leaders of Reform Robert Sherman La Forte examines the intricacies of shifting factions within the state majority party over a two decade period, from the Boss-Busters and political machines of the early 1900s through the formation of a new party behind Theodore Roosevelt in 1913. He discusses the motives, activities, accomplishments, and failures of the progressive Republicans. He provides excellent vignettes of major leaders such as William Allen White, Arthur Capper, Joseph L. Bristow, and Charles Curtis, as well as lesser-known characters such as Walter Roscoe Stubbs, Edward H. Hoch, and Cy Leland, Jr. In providing a detailed analysis of virtually all Kansas progressive Republican leaders during the era, La Forte has made a valuable contribution to both state and national political history. Description Robert Sherman La Forte was professor of history at the University of North Texas, where he taught for thirty years. In addition to this book, he coauthored three books on World War II history and the authorized history of the University of North Texas. With a New Foreword by Charles Delgadillo. Charles Delgadillo is lecturer in history at the California State Polytechnic University, Pomona, and Norco College, in California. He is the author of Crusader for Democracy: The Political Life of William Allen White. This Kansas Open Books title is funded by a grant from the National Endowment for the Humanities and the Andrew W. Mellon Foundation Humanities Open Book Program.https://digitalcommons.pittstate.edu/kansas_open_books/1038/thumbnail.jp