The Murchison Widefield Array (MWA) has collected hundreds of hours of Epoch of Reionization (EoR) data and now faces the challenge of overcoming foreground and systematic contamination to reduce the data to a cosmological measurement. We introduce several novel analysis techniques, such as cable reflection calibration, hyper-resolution gridding kernels, diffuse foreground model subtraction, and quality control methods. Each change to the analysis pipeline is tested against a two-dimensional power spectrum figure of merit to demonstrate improvement. We incorporate the new techniques into a deep integration of 32 hoursof MWA data. This data set is used to place a systematic-limited upper limit on the cosmological power spectrum of  D2.7 10 2 4 mK 2 at k = 0.27 h Mpc −1 and z = 7.1, consistent with other published limits, and a modest improvement (factor of 1.4) over previous MWA results. From this deep analysis, we have identified a list of improvements to be made to our EoR data analysis strategies. These improvements will be implemented in the future and detailed in upcoming publications.

HE OUTPOURING OF COMMUnity support following the terrorist attacks on September 11, 2001, was unprecedented. Food, clothes, and cash donations poured in and many expressed their desire to help by giving blood. 1,2 Although a strong community response has been observed after national disasters, 3-6 the nature of the September 11 attacks and subsequent mass appeals and blood drives 5 led to the collection of 572 000 units more than usually collected in September, October, and November. 7,8 This countrywide surge in blood donations was larger than those observed during the Persian Gulf War 1 or after the 1995 bombing of the Murrah Federal Building in Oklahoma City, Okla. 6 Although the short-term increase in blood donations following national disasters has been well documented, 3-5 less is known about the long-term impact on the blood supply. Gimble et al 9 noted that disasters and accidents usually have short-term effects on blood donation. Hence, the impetus to donate following disasters may be short lived. Donors, especially those giving for the first Author Affiliations, Members of the Retrovirus Epidemiology Donor Study (REDS Study Group), and Financial Disclosures are listed at the end of this article.

No evidence was found to support changing current policy to permit donations from men who practiced male-to-male sex within the past 5 years. For donors with a more remote history of male-to-male sex, the findings were equivocal. A better understanding of the association between male-to-male sex and other UDRs appears needed.