Jet mixing under the influence of a pressure gradient

Theoretical analysis of jet mixing under influence of non-constant pressure gradien

Dimensional Regularization and Dimensional Reduction in the Light Cone

We calculate all the 2 to 2 scattering process in Yang-Mills theory in the Light Cone gauge, with the dimensional regulator as the UV regulator. The IR is regulated with a cutoff in $q^+$. It supplements our earlier work, where a Lorentz non-covariant regulator was used and the final results bear some problems in gauge fixing. Supersymmetry relations among various amplitudes are checked using the light cone superfields.Comment: current version accepted by PR

Expression of \u3cem\u3eRhizobium leguminosarum\u3c/em\u3e CFN42 Genes for Lipopolysaccharide in Strains Derived from Different \u3cem\u3eR. leguminosarum\u3c/em\u3e Soil Isolates

Two mutant derivatives of Rhizobium leguminosarum ANU843 defective in lipopolysaccharide (LPS) were isolated. The LPS of both mutants lacked O antigen and some sugar residues of the LPS core oligosaccharides. Genetic regions previously cloned from another Rhizobium leguminosarum wild-type isolate, strain CFN42, were used to complement these mutants. One mutant was complemented to give LPS that was apparently identical to the LPS of strain ANU843 in antigenicity, electrophoretic mobility, and sugar composition. The other mutant was complemented by a second CFN42 lps genetic region. In this case the resulting LPS contained O-antigen sugars characteristic of donor strain CFN42 and reacted weakly with antiserum against CFN42 cells, but did not react detectably with antiserum against ANU843 cells. Therefore, one of the CFN42 lps genetic regions specifies a function that is conserved between the two R. leguminosarum wild-type isolates, whereas the other region, at least in part, specifies a strain-specific LPS structure. Transfer of these two genetic regions into wild-type strains derived from R. leguminosarum ANU843 and 128C53 gave results consistent with this conclusion. The mutants derived from strain ANU843 elicited incompletely developed clover nodules that exhibited low bacterial populations and very low nitrogenase activity. Both mutants elicited normally developed, nitrogen-fixing clover nodules when they carried CFN42 lps DNA that permitted synthesis of O-antigen-containing LPS, regardless of whether the O antigen was the one originally made by strain ANU843

A relativistic treatment of pion wave functions in the annihilation antiproton-proton -> pi^-pi^+

Quark model intrinsic wave functions of highly energetic pions in the reaction \bar pp->\pi^-\pi^+ are subjected to a relativistic treatment. The annihilation is described in a constituent quark model with A2 and R2 flavor-flux topology and the annihilated quark-antiquark pairs are in 3P_0 and 3S_1 states. We study the effects of pure Lorentz transformations on the antiquark and quark spatial wave functions and their respective spinors in the pion. The modified quark geometry of the pion has considerable impact on the angular dependence of the annihilation mechanisms.Comment: 10 pages in revtex format, 3 figure

Microscopic origin of spin-orbital separation in Sr2CuO3

Recently performed resonant inelastic x-ray scattering experiment (RIXS) at the copper L3 edge in the quasi-1D Mott insulator Sr2CuO3 has revealed a significant dispersion of a single orbital excitation (orbiton). This large and unexpected orbiton dispersion has been explained using the concept of spin-orbital fractionalization in which orbiton, which is intrinsically coupled to the spinon in this material, liberates itself from the spinon due to the strictly 1D nature of its motion. Here we investigate this mechanism in detail by: (i) deriving the microscopic spin-orbital superexchange model from the charge transfer model for the CuO3 chains in Sr2CuO3, (ii) mapping the orbiton motion in the obtained spin-orbital model into a problem of a single hole moving in an effective half-filled antiferromagnetic chain t-J model, and (iii) solving the latter model using the exact diagonalization and obtaining the orbiton spectral function. Finally, the RIXS cross section is calculated based on the obtained orbiton spectral function and compared with the RIXS experiment.Comment: 23 pages, 13 figures; v3 = style and structure improve

Review of \u3ci\u3eHell Gap: A Stratified Paleoindian Campsite at the Edge of the Rockies. \u3c/i\u3eEdited by Mary Lou Larson, Marcel Kornfeld, and George C. Frison.

Every Plains archaeologist has heard of the Hell Gap site. But few could tell you much about it. All that changes with the publication of this needed, dense, thorough collection that chronicles the life and content of this singularly important archaeological site. With 20 papers and 13 appendices, this book takes a monumental step forward in furthering our knowledge of nearly the entire Paleoindian sequence of occupation on the western Plains. Hell Gap is the type site for three Paleoindian point styles: Goshen, Hell Gap, and Frederick, and contains at least six other cultural complexes: Folsom, Midland, Agate Basin, Alberta, Eden/Scottsbluff, and Lusk. All in a stratified and fairly well-dated sequence. There are hints of Clovis, but the jury is still out. Located in eastern Wyoming, the Hell Gap site was discovered when amateur collector 1. Duguid picked up a complete Agate Basin point in 1958 (the first appendix tells his story). Sharing that information led to years of excavation by a virtual who\u27s who in the history of Plains archaeology. Previously known by a few short articles and unpublished works, this volume is the first major synthesis of one of the most studied and significant sites in the Plains

Review of \u3ci\u3eHell Gap: A Stratified Paleoindian Campsite at the Edge of the Rockies. \u3c/i\u3eEdited by Mary Lou Larson, Marcel Kornfeld, and George C. Frison.

Every Plains archaeologist has heard of the Hell Gap site. But few could tell you much about it. All that changes with the publication of this needed, dense, thorough collection that chronicles the life and content of this singularly important archaeological site. With 20 papers and 13 appendices, this book takes a monumental step forward in furthering our knowledge of nearly the entire Paleoindian sequence of occupation on the western Plains. Hell Gap is the type site for three Paleoindian point styles: Goshen, Hell Gap, and Frederick, and contains at least six other cultural complexes: Folsom, Midland, Agate Basin, Alberta, Eden/Scottsbluff, and Lusk. All in a stratified and fairly well-dated sequence. There are hints of Clovis, but the jury is still out. Located in eastern Wyoming, the Hell Gap site was discovered when amateur collector 1. Duguid picked up a complete Agate Basin point in 1958 (the first appendix tells his story). Sharing that information led to years of excavation by a virtual who\u27s who in the history of Plains archaeology. Previously known by a few short articles and unpublished works, this volume is the first major synthesis of one of the most studied and significant sites in the Plains

A Meta-Analysis of the Effect of Education on Social Capital

To assess the empirical estimates of the effect of education on social trust and social participation - the basic dimensions of individual social capital - a meta-analysis is applied, synthesizing 154 evaluations on social trust, and 286 evaluations on social participation. The publication bias problem is given special emphasis in the meta-analysis. Our statistical synthesis confirms that education is a strong and robust correlate of individual social capital. The meta-analysis provides support for the existence of a relative effect of education on social participation, and of a reciprocity mechanism between the dimensions of social capital. The analysis also suggests that the erosion of social participation during the past decades has coincided with a decrease of the marginal return to education on social capital. Finally, we find differences in the return to education between genders, between US and other nations, and variations for different education attainments.