THE IMPACT OF "BIG-BOX" BUILDING MATERIALS STORES ON HOST TOWNS AND SURROUNDING COUNTIES IN A MIDWESTERN STATE

This paper analyzes 11 regions in a midwestern state where big-box building materials stores have opened. The zero-sum-game theory is verified; the sales gains in the host counties equaled the losses in the surrounding counties. The results are important to existing merchants and local officials in setting strategies and policies.Community/Rural/Urban Development,

AN ANALYSIS OF THE TRANSFER OF FUNDS FROM WEAK RETAIL COUNTIES TO STRONG RETAIL COUNTIES IN IOWA VIA LOCAL OPTION SALES TAXES

This study analyzes the transfer of tax dollars from "retail poor" to "retail rich" counties via local option sales taxes in Iowa. These taxes may potentially transfer more than one billion dollars from rural to urban counties over the next ten years. The implications for economic development policy are discussed.Public Economics,

Revisiting Wal-Mart\u27s impact on Iowa small town retail: twenty-five years later

Stone conducted the first study of Wal-Mart stores economic impact in Iowa in 1988. Since then, research on Wal-Mart’s impacts has exploded. Recent studies employ sophisticated statistical techniques to more accurately measure the size and direction of effects. Many reach conclusions similar to Stone’s original work. This paper updates the original Stone study with additional years of data. It draws on recent methodological advances to help account for Wal-Mart’s strategic location decisions on estimated retail sales impacts in Iowa. Consistent with previous studies, we find that Wal-Mart’s entry into smaller trade centers in Iowa had a big initial impact on host town retail sales, with some categories experiencing large significant increases while others saw declines in sales per capita. Wal-Mart’s presence helped to stabilize or even expand the local retail sector of most rural Iowa host communities. To conclude, policy implications for local economic development officials are discussed

Building Jobs in Iowa: New Deal Dams of the Wapsipinicon River Watershed in Northeast Iowa

https://ir.uiowa.edu/osa_pubs/1013/thumbnail.jp

The Prettiest Dam on the Maquoketa River : The Quaker Mill Dam at Machester, Iowa

https://ir.uiowa.edu/osa_pubs/1014/thumbnail.jp

Analytical Bethe Ansatz for A2n−1(2),Bn(1),Cn(1),Dn(1)A^{(2)}_{2n-1}, B^{(1)}_n, C^{(1)}_n, D^{(1)}_n quantum-algebra-invariant open spin chains

We determine the eigenvalues of the transfer matrices for integrable open quantum spin chains which are associated with the affine Lie algebras $A^{(2)}_{2n-1}, B^{(1)}_n, C^{(1)}_n, D^{(1)}_n$, and which have the quantum-algebra invariance U_q(C_n), U_q(B_n), U_q(C_n), U_q(D_n)$, respectively.Comment: 14 pages, latex, no figures (a character causing latex problem is removed

Design and testing of an electron cyclotron resonance heating ion source for use in high field compact superconducting cyclotrons

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2012.Cataloged from PDF version of thesis.Includes bibliographical references (p. 78-82).The main goal of this project is to evaluate the feasibility of axial injection of a high brightness beam from an Electron Cyclotron Resonance ion source into a high magnetic field cyclotron. Axial injection from an ion source with high brightness is important to reduce particle losses in the first several turns of acceleration within the cyclotron. Beam brightness is a measure of the beam current and rate of spread of the beam. The ultimate goal in developing an ECR ion source is to enable reduced beam losses along the entire acceleration path from the ion source through the cyclotron, allowing for a high beam current accelerator. Cyclotrons with high beam current have the potential to improve the availability of proton radiation therapy. Proton radiation therapy is a precisely targeted treatment capable of providing an excellent non-invasive treatment option for tumors located deep within tissue. In order to model injection into high field it is necessary to measure the parameters of the beam extracted from the ion source. The two most important beam parameters are emittance and beam current. The emittance of the beam is a measurement of the rate of beam spread along the path of the beam and beam current is a measurement of the energy and quantity of particles within a charged particle beam. This thesis presents the design and analysis of an ECR Ion Source and the instruments used to measure the emittance and beam current. Based on the modeling of the ECR ion source beam and the data gathered during testing, the ECR ion source presented in this thesis has the potential to provide a high brightness beam capable of high field axial injection. Beam simulations provide insight into the performance of the ECR ion source in high magnetic field. Axial beam injection from an external ion source is promising with moderate refinements to the ECR ion source.by Mark E. Artz.S.M

On the algebraic Bethe ansatz: Periodic boundary conditions

In this paper, the algebraic Bethe ansatz with periodic boundary conditions is used to investigate trigonometric vertex models associated with the fundamental representations of the non-exceptional Lie algebras. This formulation allow us to present explicit expressions for the eigenvectors and eigenvalues of the respective transfer matrices.Comment: 36 pages, LaTex, Minor Revisio

Surficial geologic map of the Des Moines Lobe of Iowa, Phase 5: Polk County

https://ir.uiowa.edu/igs_ofm/1030/thumbnail.jp