Print engine color management using customer image content

The production of quality color prints requires that color accuracy and reproducibility be maintained to within very tight tolerances when transferred to different media. Variations in the printing process commonly produce color shifts that result in poor color reproduction. The primary function of a color management system is maintaining color quality and consistency. Currently these systems are tuned in the factory by printing a large set of test color patches, measuring them, and making necessary adjustments. This time-consuming procedure should be repeated as needed once the printer leaves the factory. In this work, a color management system that compensates for print color shifts in real-time using feedback from an in-line full-width sensor is proposed. Instead of printing test patches, this novel attempt at color management utilizes the output pixels already rendered in production pages, for a continuous printer characterization. The printed pages are scanned in-line and the results are utilized to update the process by which colorimetric image content is translated into engine specific color separations (e.g. CIELAB-\u3eCMYK). The proposed system provides a means to perform automatic printer characterization, by simply printing a set of images that cover the gamut of the printer. Moreover, all of the color conversion features currently utilized in production systems (such as Gray Component Replacement, Gamut Mapping, and Color Smoothing) can be achieved with the proposed system

William Elliot to John Kean, October 23, 1790

William wrote to John, addressed to Philadelphia, about the state of John\u27s plantation. The was an equinoctial storm (tropical storm) in mid-September that damaged indigo crops. Sam is managing the plantation. William suffered from smach fever for weeks. Robert Barnwell expects to be elected to Congress. Dr. Stuart will no longer rent John\u27s house in Beaufort.https://digitalcommons.kean.edu/lhc_1790s/1014/thumbnail.jp

William Elliot to John Kean, June 9, 1790

William wrote to John, c/o Joseph Clay Jr. in New York, to update John on the weather and agriculture onat John\u27s plantation on Paris Island, SC during the fall and winter seasons. He includes details about indigo, corn, and potatoes, and the weather. Lightning struck a church steeple. William\u27s Uncle Robert attended the State Convention in Columbia where the South Carolina State Constitution was revised. The parishes are divided. Names include Mr. Wilcox, Sam (who manages John\u27s land), Dr. Cuthbert, Mrs. Elliot, and young William.https://digitalcommons.kean.edu/lhc_1790s/1013/thumbnail.jp

Examining the Effect of Pore Size Distribution and Shape on Flow through Unsaturated Peat using Computer Tomography

The hydraulic conductivity of unsaturated peat soil is controlled by the air-filled porosity, pore size and geometric distribution as well as other physical properties of peat materials. This study investigates how the size and shape of pores affects the flow of water through peat soils. In this study we used X-ray Computed Tomography (CT), at 45μm resolution under 5 specific soil-water pressure head levels to provide 3-D, high-resolution images that were used to detect the inner pore structure of peat samples under a changing water regime. Pore structure and configuration were found to be irregular, which affected the rate of water transmission through peat soils. The 3-D analysis suggested that pore distribution is dominated by a single large pore-space. At low pressure head, this single large air-filled pore imparted a more effective flowpath compared to smaller pores. Smaller pores were disconnected and the flowpath was more tortuous than in the single large air-filled pore, and their contribution to flow was negligible when the single large pore was active. We quantify the pore structure of peat soil that affects the hydraulic conductivity in the unsaturated condition, and demonstrate the validity of our estimation of peat unsaturated hydraulic conductivity by making a comparison with a standard permeameter-based method. Estimates of unsaturated hydraulic conductivities were made for the purpose of testing the sensitivity of pore shape and geometry parameters on the hydraulic properties of peats and how to evaluate the structure of the peat and its affects on parameterization. We also studied the ability to quantify these factors for different soil moisture contents in order to define how the factors controlling the shape coefficient vary with changes in soil water pressure head. The relation between measured and estimated unsaturated hydraulic conductivity at various heads shows that rapid initial drainage, that changes the air-filled pore properties, creates a sharp decline in hydraulic conductivity. This is because the large pores readily lose water, the peat rapidly becomes less conductive and the flow path among pores, more tortuous

The applicability and accuracy of computer modeling in regards to acoustical scattering by a complex geometry

Thesis: S.B., Massachusetts Institute of Technology, Department of Architecture, 2005.Cataloged from PDF version of thesis.Includes bibliographical references (page 27).The intent of the investigation is to try to characterize the nature of scattered acoustical energy off of the face of a concrete masonry unit with an atypical geometry. The nature of the tests conducted would be in accordance with the AES-4id-2001 document which pertains to the Characterization and measurement of surface scattering uniformity. The uniformity of scattering can be analyzed and can give one an indication of the diffusive properties of the test samples. The product for which the testing is proposed, as previously mentioned, is a modification of a concrete masonry unit. The product is not uniform in section, a fact which means a two dimensional analysis of scattering will not suffice. Instead, the distribution of reflected sound waves over a hemispherical shell will be examined.by William J. Elliot.S.B