137,792 research outputs found

    Overview of Deeply Virtual Compton Scattering at HERMES

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    Deeply Virtual Compton Scattering represents the best experimental channel through which to understand Generalised Parton Distributions. The HERMES experiment measured the most diverse set of DVCS results of any experiment; this talk discusses the most recent sets of DVCS results released by HERMES and the unique experimental conditions found at HERMES that facilitated the measurements. We also examine the various ways in which the HERMES experimental measurements are being used to constrain GPDs and how future experiments can learn from the HERMES program.Comment: 4 pages, 2 figures, prepared for DIS201

    Lies, Lyres, and Laughter: Surplus Potential in the \u3ci\u3eHomeric Hymn to Hermes\u3c/i\u3e

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    This paper seeks to reevaluate scholarly responses to the laughter in the Homeric Hymn to Hermes. Using ZupanÄŤiÄŤ\u27s recent work on comedy, I argue that Hermes intentionally exploits surplus potentials that emerge from splits in the perceived unity and completeness of Zeus\u27s cosmos. Through surpluses (a tortoise-lyre, a baby cattle rustler, a baby master of legal speech), Hermes is able to attain his place among the Olympians. The laughter of the audience is one final expression of this acceptance of Hermes and his potential

    Protein interactions in Xenopus germ plasm RNP particles

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    Hermes is an RNA-binding protein that we have previously reported to be found in the ribonucleoprotein (RNP) particles of Xenopus germ plasm, where it is associated with various RNAs, including that encoding the germ line determinant Nanos1. To further define the composition of these RNPs, we performed a screen for Hermes-binding partners using the yeast two-hybrid system. We have identified and validated four proteins that interact with Hermes in germ plasm: two isoforms of Xvelo1 (a homologue of zebrafish Bucky ball) and Rbm24b and Rbm42b, both RNA-binding proteins containing the RRM motif. GFP-Xvelo fusion proteins and their endogenous counterparts, identified with antisera, were found to localize with Hermes in the germ plasm particles of large oocytes and eggs. Only the larger Xvelo isoform was naturally found in the Balbiani body of previtellogenic oocytes. Bimolecular fluorescence complementation (BiFC) experiments confirmed that Hermes and the Xvelo variants interact in germ plasm, as do Rbm24b and 42b. Depletion of the shorter Xvelo variant with antisense oligonucleotides caused a decrease in the size of germ plasm aggregates and loosening of associated mitochondria from these structures. This suggests that the short Xvelo variant, or less likely its RNA, has a role in organizing and maintaining the integrity of germ plasm in Xenopus oocytes. While GFP fusion proteins for Rbm24b and 42b did not localize into germ plasm as specifically as Hermes or Xvelo, BiFC analysis indicated that both interact with Hermes in germ plasm RNPs. They are very stable in the face of RNA depletion, but additive effects of combinations of antisense oligos suggest they may have a role in germ plasm structure and may influence the ability of Hermes protein to effectively enter RNP particles

    Determination of the fragmentation functions from an NLO QCD analysis of the HERMES data on pion multiplicities

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    An NLO QCD analysis of the final HERMES data on pion multiplicities is presented and a new set of pion fragmentation functions is extracted from the best fit to the data. We have studied the so-called [x,z] and [Q^2,z] presentations of their data, as given by HERMES, which, in principle, should simply be two different ways of presenting the experimental data. We have based our extraction on an excellent fit to the [Q^2,z] presentation of the data. We also draw attention to what appears to be a problem with the [x,z] presentation of the HERMES data.Comment: 12 pages, 7 figures; This updated version corresponds to the paper accepted for publication in Phys. Rev.

    A Trickster’s Oaths in The \u3cem\u3eHomeric Hymn to Hermes\u3c/em\u3e

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    Hermes’ maturation into a god of commerce and diplomacy is punctuated by a series of oaths. At first he uses tricky or unsworn oaths in the investigation of his theftof Apollo’s cattle, but eventually he and Apollo exchange oaths that evoke the protocols of ritualized friendship. Although the ceremony suggests that Hermes has achieved adulthood, a narrative sleight of hand leaves some ambiguity about the completion of the ritual
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