Dynamic Web File Format Transformations with Grace

Web accessible content stored in obscure, unpopular or obsolete formats represents a significant problem for digital preservation. The file formats that encode web content represent the implicit and explicit choices of web site maintainers at a particular point in time. Older file formats that have fallen out of favor are obviously a problem, but so are new file formats that have not yet been fully supported by browsers. Often browsers use plug-in software for displaying old and new formats, but plug-ins can be difficult to find, install and replicate across all environments that one may use. We introduce Grace, an http proxy server that transparently converts browser-incompatible and obsolete web content into web content that a browser is able to display without the use of plug-ins. Grace is configurable on a per user basis and can be expanded to provide an array of conversion services. We illustrate how the Grace prototype transforms several image formats (XBM, PNG with various alpha channels, and JPEG 2000) so they are viewable in Internet Explorer.Comment: 12 pages, 9 figure

The historical individuality of the Christian faith (movement)

Thesis (M. A.)--Boston University, 1936. This item was digitized by the Internet Archive

Blue Hill Shipping Receipt: Alma Odlin, 1863

https://digitalmaine.com/blue_hill_documents/1103/thumbnail.jp

Blue Hill Shipping Receipt: Alma Odlin, 1859

https://digitalmaine.com/blue_hill_documents/1104/thumbnail.jp

Phasing the Mirror Segments of the Keck Telescopes: The Broadband Phasing Algorithm

To achieve its full diffraction limit in the infrared, the primary mirror of the Keck telescope (now telescopes) must be properly phased: The steps or piston errors between the individual mirror segments must be reduced to less than 100 nm. We accomplish this with a wave optics variation of the Shack–Hartmann test, in which the signal is not the centroid but rather the degree of coherence of the individual subimages. Using filters with a variety of coherence lengths, we can capture segments with initial piston errors as large as ± 30 µm and reduce these to 30 nm—a dynamic range of 3 orders of magnitude. Segment aberrations contribute substantially to the residual errors of ~75 nm

Influence of Creeping Bentgrass Cultivars on the Biocontrol Efficacy of Microbial Inoculants

ReportInconsistent performance of biological control strategies for turfgrass disease control has limited the adoption of this technology into IPM programs. A major factor contributing to this variable performance in agricultural systems is the cultivars to which biological control organisms are applied. In the proposed study, our goal was to determine whether biological control activity of introduced inoculants was affected by the creeping bentgrass cultivar to which they were applied. We reasoned that biological control performance should be enhanced on cultivars that are less susceptible to the disease in question as opposed to highly susceptible cultivars. The short-term applied goal of this research was to develop the understanding of how we might maximize the performance of microbial inoculants in turfgrass systems. The objectives of our research were to 1) determine the differential susceptibility of bentgrass cultivars to Pythium aphanidermatum and 2) determine the efficacy of known microbial inoculants in controlling Pythium damping-off on different bentgrass cultivars. The results of this study will ultimately be critical in making sound IPM recommendations for creeping bentgrass cultivars that will be most compatible with biological control strategies

Mapping the magic numbers in binary Lennard-Jones clusters

Using a global optimization approach that directly searches for the composition of greatest stability, we have been able to find the particularly stable structures for binary Lennard-Jones clusters with up to 100 atoms for a range of Lennard-Jones parameters. In particular, we have shown that just having atoms of different size leads to a remarkable stabilization of polytetrahedral structures, including both polyicosahedral clusters and at larger sizes structures with disclination lines.Comment: 5 pages, 5 figure