Generalized Wilson Chain for solving multichannel quantum impurity problems

The Numerical Renormalization Group is used to solve quantum impurity problems, which describe magnetic impurities in metals, nanodevices, and correlated materials within DMFT. Here we present a simple generalization of the Wilson Chain, which improves the scaling of computational cost with the number of channels/bands, bringing new problems within reach. The method is applied to calculate the t-matrix of the three-channel Kondo model at T=0, which shows universal crossovers near non-Fermi liquid critical points. A non-integrable three-impurity problem with three bands is also studied, revealing a rich phase diagram and novel screening/overscreening mechanisms.Comment: 5 pages + 5 pages supplementary materia

Prospectus, January 19, 2000

https://spark.parkland.edu/prospectus_2000/1001/thumbnail.jp

Growing Pains or Opportunities? A Customer Survey of Three Farmers\u27 Markets in One Rural Community

The continued growth of farmers\u27 markets is presenting new challenges to Extension. As the number of markets expands, how can Extension help those in the same community work together for mutual benefit? The study reported here examined similarities and differences among customers attending three different farmers\u27 markets within a single locality in Gettysburg, Pennsylvania. Based on 370 customer surveys, study results underscore the diversity of markets operating within the same community and provide insights into ways Extension might assist markets to work together to expand their shared customer base, increase revenues, and better serve local residents

Prospectus, January 12, 2000

https://spark.parkland.edu/prospectus_2000/1000/thumbnail.jp

Prospectus, December 1, 1999

https://spark.parkland.edu/prospectus_1999/1032/thumbnail.jp

Prospectus, March 1, 2000

https://spark.parkland.edu/prospectus_2000/1007/thumbnail.jp

Prospectus, November 24, 1999

https://spark.parkland.edu/prospectus_1999/1031/thumbnail.jp

Prospectus, April 26, 2000

https://spark.parkland.edu/prospectus_2000/1014/thumbnail.jp

Prospectus, January 26, 2000

https://spark.parkland.edu/prospectus_2000/1002/thumbnail.jp

Nutrient Digestibility of Condensed Algal Residue Solubles in Beef Cattle Fishing Diets

Condensed algal residue solubles (CARS) were evaluated in finishing cattle diets. Six treatments were evaluated (2 × 3 factorial arrangement), CARS inclusion in the diet at 0, 5, or 10% of diet dry matter with 0 or 20% wet distillers grains. Th e remainder of the diets consisted of 57.5– 87.5% dry rolled corn, 7.5% sorghum silage and 5% supplement. Increasing wet distillers grains in the diet had no effect on dry matter and organic matter intake but decreased dry matter and organic matter digestibility. Increasing CARS inclusion in the diet resulted in lower dry matter and organic matter intake with no effect on dry matter and organic matter digestibility. Replacing up to 10% dry rolled corn with CARS in diets with or without wet distillers grains had little effect on digestibility of finishing beef cattle diets