POPULAR INFORMATIONAL PRIORITIES IN AGRICULTURAL EXTENSION

Due to agriculture's increasingly complex technical and economic environment, the diversity of information required for competitive and profitable farming is growing as never before. With constant and, in some cases, reduced resources for agricultural programs, Extension must exercise special care in prioritizing informational efforts to best meet farm-client needs and retain an important base of public support. This paper presents a method of identifying popular informational priorities in Agricultural Extension. The method is illustrated by application to dairy programming in Massachusetts.Teaching/Communication/Extension/Profession,

Parables

A collection of drawings by James C. Christensen, with paraphrased narratives written by Robert L. Millet.https://digitalcommons.andrews.edu/pda/1009/thumbnail.jp

Strain-Induced Conduction Band Spin Splitting in GaAs from First Principles Calculations

We use a recently developed self-consistent GW approximation to present first principles calculations of the conduction band spin splitting in GaAs under [110] strain. The spin orbit interaction is taken into account as a perturbation to the scalar relativistic hamiltonian. These are the first calculations of conduction band spin splitting under deformation based on a quasiparticle approach; and because the self-consistent GW scheme accurately reproduces the relevant band parameters, it is expected to be a reliable predictor of spin splittings. We also discuss the spin relaxation time under [110] strain and show that it exhibits an in-plane anisotropy, which can be exploited to obtain the magnitude and sign of the conduction band spin splitting experimentally.Comment: 8 pages, 4 figures, 1 tabl

Pediatric Transplantation in the United States, 1996–2005

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/73448/1/j.1600-6143.2007.01780.x.pd

Egg marketing systems and practices in New England, Station Bulletin, no.497

The Bulletin is a publication of the New Hampshire Agricultural Experiment Station, College of Life Sciences and Agriculture, University of New Hampshire, Durham, New Hampshire

Flavor-Changing Processes in Extended Technicolor

We analyze constraints on a class of extended technicolor (ETC) models from neutral flavor-changing processes induced by (dimension-six) four-fermion operators. The ETC gauge group is taken to commute with the standard-model gauge group. The models in the class are distinguished by how the left- and right-handed $(L,R)$ components of the quarks and charged leptons transform under the ETC group. We consider $K^{0} - \bar K^0$ and other pseudoscalar meson mixings, and conclude that they are adequately suppressed if the $L$ and $R$ components of the relevant quarks are assigned to the same (fundamental or conjugate-fundamental) representation of the ETC group. Models in which the $L$ and $R$ components of the down-type quarks are assigned to relatively conjugate representations, while they can lead to realistic CKM mixing and intra-family mass splittings, do not adequately suppress these mixing processes. We identify an approximate global symmetry that elucidates these behavioral differences and can be used to analyze other possible representation assignments. Flavor-changing decays, involving quarks and/or leptons, are adequately suppressed for any ETC-representation assignment of the $L$ and $R$ components of the quarks, as well as the leptons. We draw lessons for future ETC model building.Comment: 25 page

The Ursinus Weekly, October 2, 1961

Retirements, sabbaticals open six faculty posts: Many new faces in old places here; Library cataloguer also appointed • Miss Pennsylvania plans active year: U.C. beauty Lynne Maloney enters Atlantic City pageant • Fall Y-retreat to feature music talk; Informal fun main weekend motif • Albrightians hear U.C.\u27s Dean Pettit; Speech on radio • Daily bulletin to relieve dining room confusion • Young Republican attends Minnesota convention • Campus welcomes freshmen with customs and classes • ISC defines strict rushing procedure • Art films offered in Philadelphia for eleventh year • Editorial: A not quite traditional welcome; A plain welcome • Letters to the editor • Chapel commentary • Ursinus in the past • Field hockey crew should show well • Whatley hopeful; But injuries haunt Grizzly team • Booters rebuild; Backfield strong • Bear gridders show promise despite Crusader thrashing • DiEugenio on defense: A study in aggression • Varsity club organizes, prints football program • Ursinus soccer team to play eleven games • Tests scheduled in near future for civil service, Fulbright grants • Campus Illustrated being sold here • Weekly adds three to editorial staff • Initial pre-med meeting to discuss pediatrics; Local doctor to speak • A fundamentalist looks at his collegehttps://digitalcommons.ursinus.edu/weekly/1299/thumbnail.jp

Evolution of the leukotoxin promoter in genus Mannheimia

<b>Background</b>: The <i>Mannheimia</i> species encompass a wide variety of bacterial lifestyles, including opportunistic pathogens and commensals of the ruminant respiratory tract, commensals of the ovine rumen, and pathogens of the ruminant integument. Here we present a scenario for the evolution of the leukotoxin promoter among representatives of the five species within genus <i>Mannheimia</i>. We also consider how the evolution of the leukotoxin operon fits with the evolution and maintenance of virulence. <b>Results</b>: The alignment of the intergenic regions upstream of the leukotoxin genes showed significant sequence and positional conservation over a 225-bp stretch immediately proximal to the transcriptional start site of the <i>lktC</i> gene among all <i>Mannheimia</i> strains. However, in the course of the <i>Mannheimia</i> genome evolution, the acquisition of individual noncoding regions upstream of the conserved promoter region has occurred. The rate of evolution estimated branch by branch suggests that the conserved promoter may be affected to different extents by the types of natural selection that potentially operate in regulatory regions. Tandem repeats upstream of the core promoter were confined to <i>M. haemolytica</i> with a strong association between the sequence of the repeat units, the number of repeat units per promoter, and the phylogenetic history of this species. <b>Conclusion</b>: The mode of evolution of the intergenic regions upstream of the leukotoxin genes appears to be highly dependent on the lifestyle of the bacterium. Transition from avirulence to virulence has occurred at least once in <i>M. haemolytica</i> with some evolutionary success of bovine serotype A1/A6 strains. Our analysis suggests that changes in <i>cis</i>-regulatory systems have contributed to the derived virulence phenotype by allowing phase-variable expression of the leukotoxin protein. We propose models for how phase shifting and the associated virulence could facilitate transmission to the nasopharynx of new hosts