Infrared Observations of novae in the SOFIA era

Classical novae inject chemically enriched gas and dust into the local inter-stellar medium (ISM). Abundances in the ejecta can be deduced from infrared (IR) forbidden line emission. IR spectroscopy can determine the mineralogy of grains that grow in nova ejecta. We anticipate the impact that NASA's new Stratospheric Observatory for Infrared Astronomy (SOFIA) will have on future IR studies of novae.Comment: To appear in the proceedings of "Physics of Evolved Stars 2015 - A conference dedicated to the memory of Olivier Chesneau

The circumstellar dust of "Born-Again" stars

We describe the evolution of the carbon dust shells around Very Late Thermal Pulse (VLTP) objects as seen at infrared wavelengths. This includes a 20-year overview of the evolution of the dust around Sakurai's object (to which Olivier made a seminal contribution) and FG Sge. VLTPs may occur during the endpoint of as many as 25% of solar mass stars, and may therefore provide a glimpse of the possible fate of the Sun.Comment: To appear in the proceedings of "Physics of Evolved Stars 2015 - A conference dedicated to the memory of Olivier Chesneau

A Partial Taxonomy of Substitutability and Interchangeability

Substitutability, interchangeability and related concepts in Constraint Programming were introduced approximately twenty years ago and have given rise to considerable subsequent research. We survey this work, classify, and relate the different concepts, and indicate directions for future work, in particular with respect to making connections with research into symmetry breaking. This paper is a condensed version of a larger work in progress.Comment: 18 pages, The 10th International Workshop on Symmetry in Constraint Satisfaction Problems (SymCon'10

Bulletin No. 262 - Comparative Yields of Spring Wheat Varieties in Utah

Wheat was one of the first crops grown by early Utah settlers. It has since occupied an important place in the agriculture of the state. While wheat is almost the only crop grown successfully on dry-lands, it is also important under irrigation. Thirty per cent of the wheat acreage of Utah in 1929 was spring-sown, which produced 44 per cent of the state\u27s production. Eighty-seven per cent of the spring wheat acreage was grown under irrigation, this acreage producing 92.3 per cent of the total spring wheat crop. Thirty-eight per cent of Utah farmers were growing spring wheat in 1929; this wheat was grown in all ,counties of the state except one, the percentage of farmers growing this crop at that time ranging from less than 1 per cent in Washington and San Juan Counties to 64 per cent in Emery County; yet Emery County ranks about sixth in acreage and eighth in production

Bulletin No. 263 - Relative Produciton of Feed Grain from Spring-Grown Cereals in Utah

Nearly one-third of the cropped acreage of Utah is devoted to cereals. Except for wheat, most of these crops are fed locally. In addition to this, an average of over a million bushels of corn, barley, and oats is shipped into the state each year to be used in various livestock and poultry industries. The purpose of this publication is to show the comparative amount of feed produced by the different crops--wheat, oats, barley, and corn--under similar conditions as determined for the specified four years by acre-yields obtained in various agricultural regions of the state. One should bear clearly in mind that its purpose is not to encourage all farmers to grow crops giving the highest feed value to the acre or to shift from one cereal to another, although this might be done to advantage if increased feed production is desired

Bulletin No. 293 - Velvon: A New Smooth-Awned Barley

Velvon, a new barley variety with smooth awns, with relatively stiff straw, and with a high degree of resistance to covered smut was developed at the Utah Agricultural Experiment Station through the cooperative efforts of the Station and the Division of Cereal Crops and Diseases, Bureau of Plant Industry, U. S. Department of Agriculture. This new variety resulted as a hybrid strain from a cross made in 1930 for the purpose of improving straw strength and the texture of awns