Separation of foregrounds from cosmic microwave background observations with the MAP satellite

Simulated observations of a 10\dg \times 10\dg field by the Microwave Anisotropy Probe (MAP) are analysed in order to separate cosmic microwave background (CMB) emission from foreground contaminants and instrumental noise and thereby determine how accurately the CMB emission can be recovered. The simulations include emission from the CMB, the kinetic and thermal Sunyaev-Zel'dovich (SZ) effects from galaxy clusters, as well as Galactic dust, free-free and synchrotron. We find that, even in the presence of these contaminating foregrounds, the CMB map is reconstructed with an rms accuracy of about 20 $\mu$K per 12.6 arcmin pixel, which represents a substantial improvement as compared to the individual temperature sensitivities of the raw data channels. We also find, for the single 10\dg \times 10\dg field, that the CMB power spectrum is accurately recovered for \ell \la 600.Comment: 7 pages, 7 figures, MNRAS submitte

"Fiscal Equalization in Japan: Assessment and Recommendations"

Intergovernmental fiscal relations in Japan have been strained in recent years. This paper seeks to assess the Japanese equalization transfer in the light of the theory of fiscal federalism. This paper argues that the case for equalization lies in offsetting net fiscal benefit (NFB) differentials across jurisdictions. It has been shown that the case for equalization and its design depend on the type of public good being provided as well as the mode of finance. Moreover, where equalization is called for, its form and level can be very different depending on whether the relevant policy goal is that of fiscal equity or fiscal efficiency. Studying the institutional context, we arrive at the conclusion that the system of equalization transfers in Japan is consistent with the application of those principles.

Sommerfeld's image method in the calculation of van der Waals forces

We show how the image method can be used together with a recent method developed by C. Eberlein and R. Zietal to obtain the dispersive van der Waals interaction between an atom and a perfectly conducting surface of arbitrary shape. We discuss in detail the case of an atom and a semi- infinite conducting plane. In order to employ the above procedure to this problem it is necessary to use the ingenious image method introduced by Sommerfeld more than one century ago, which is a generalization of the standard procedure. Finally, we briefly discuss other interesting situations that can also be treated by the joint use of Sommerfeld's image technique and Eberlein-Zietal method.Comment: To appear in the proceedings of Conference on Quantum Field Theory under the Influence of External Conditions (QFEXT11

The Ursinus Weekly, April 7, 1905

Zwinglian anniversary • A college fetish • Alumni notes • Staff election • Baseball • College notes • Orchestra concert • Scientific expedition • College world • Ursinus Union • Noticehttps://digitalcommons.ursinus.edu/weekly/3010/thumbnail.jp