An Examination of an Effective Peer Evaluation Process

This student, peer evaluation process for mid-sized groups was developed to allow for assessment of individual performance in a high-stakes, team project. The objective is to ensure, as much as possible, the grades being assigned are being earned

Senior Recital: Mark Donahue

Kemp Recital HallMarch 3, 2012Saturday Afternoon2:30 p.m

The mass-L_x relation for moderate luminosity X-ray clusters

We present measurements of the masses of a sample of 25 moderate X-ray luminosity clusters of galaxies from the 160 square degree ROSAT survey. The masses were obtained from a weak lensing analysis of deep F814W images obtained using the Advanced Camera for Surveys (ACS). We present an accurate empirical correction for the effect of charge transfer (in)efficiency on the shapes of faint galaxies. A significant lensing signal is detected around most of the clusters. The lensing mass correlates tightly with the cluster richness. We measured the intrinsic scatter in the scaling relation between M_2500 and L_X and find the best fit power law slope and normalisation to be alpha=0.68+-0.07 and M_X=(1.2+-0.12)10^14M_sun (for L_X=2x10^44 erg/s). These results agree well with a number of recent studies, but the normalisation is lower compared to the study of Rykoff et al. (2008b). One explanation for this difference may be the fact that (sub)structures projected along the line-of-sight boost both the galaxy counts and the lensing mass. Such superpositions lead to an increased mass at a given L_X when clusters are binned by richness.Comment: accepted for publication in the Astrophysical Journal; 15 pages, 11 figure

Sophomore Recital: Mark Donahue, Saxophone; Momoko Gresham, Piano; April 7, 2010

Kemp Recital HallApril 7, 2010Wednesday Evening9:00 p.m

B847: Review of Potential Pasteurization Methods for Apple Cider

The main focus of this paper is to review the pasteurization methods that can be applied to the needs of the apple industry and to recommend further research. In addition to the review of methods, we conducted a sensory evaluation of cider to evaluate the acceptability of various pasteurized samples. This review of potential methods for product treatment will serve as an informative study with recommendations for future processing. Although not an exhaustive survey, conventional methods and the most promising new techniques are discussed.https://digitalcommons.library.umaine.edu/aes_bulletin/1008/thumbnail.jp

Sophomore Recital: Mark Donahue, Clarinet; Momoko Gresham, Piano; November 2, 2009

Kemp Recital HallNovember 2, 2009Monday Evening7:00 p.m