20,331 research outputs found

    Spectral analysis of Markarian 421 and Markarian 501 with HAWC

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    The Hight Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory monitors the gamma-ray sky in the energy range from 100 GeV to 100 TeV and has detected two very high energy (VHE) blazars: Markarian 421 (Mrk 421) and Markarian 501 (Mrk 501) in 1.5 years of observations. In this work, we present the spectral analysis above 1 TeV of both sources using a maximum likelihood method and an artificial neural network as an energy estimator. The main objectives are to constrain the spectral curvature of Mrk 421 and Mrk 501 at ∼\sim5 TeV using the EBL models from Gilmore et al. (2012) and Franceschini et al. (2008).Comment: Presented at the 35th International Cosmic Ray Conference (ICRC2017), Bexco, Busan, Korea. See arXiv:1708.02572 for all HAWC contribution

    Movement in Contemporary Staged Adaptations of the Alevi Semahs (1982-2018)

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    The semahs are musical and movement practices enacted at the core of religious ceremonies called ayn-i cem which Alevis communities perform to fulfil diverse social and spiritual needs. As part of urbanization, migration, folklorization and heritage-making processes, since the 1970s, in urban environments of Turkey and Europe, these practices started to be adapted and performed also outside of these ritual contexts. As part of folklore and of professional performing arts projects, both Alevis and non-Alevi actors and dancers started to learn and perform the semahs on the stage. In this way, the practices became a summative emblem through which the core tenets of the Alevi belief systems and cultures and its resistant stance towards the national imagination came to be divulged and promoted to audiences of Alevis and non-Alevis alike. Paying attention to some of the public and professional performances of the semahs outside of the ritual context, in this thesis I argue that since the 1980s, the adaptation of the semahs into performing arts frameworks had a pivotal role in the contemporary ‘explosion’ of Alevi identities in Turkey and internationally. To sustain the argument, through the presentation of ethnographic material gathered during long-term and multi-sited fieldwork research, I analyse three performing arts projects. Resorting to scholarship in Anthropology, Performance, and Dance as well as to critical application of Laban-related movement analysis methods, I show how each of these stage projects displays a different layer in the imaginative re-workings and stylizations of the semahs on a transnational scale. Accordingly, by examining historical changes in the transmission of semah movements and participation in semah events, I impart new knowledge on themes of embodiment, interactivity, participation and presentation within Alevi cultures

    Prevalence of QoI resistance and mtDNA diversity in the Irish Zymoseptoria tritici population

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    peer-reviewedThe emergence and spread of Quinone outside Inhibitor (QoI) fungicide resistance in the Irish Zymoseptoria tritici population in the early 2000s had immediate impacts on the efficacy of the entire group of fungicides for the control of septoria tritici blotch. As a result, a dramatic reduction in the quantities applied to winter wheat occurred in the following seasons. Even in the absence of these fungicides, the frequency of the resistance allele, G143A in the pathogens mtDNA has remained exceptionally high (>97%), and as such, it can be anticipated that continued poor efficacy of current QoI fungicides will be observed. Amongst the isolates with G143A, differences in sensitivity to the QoI pyraclostrobin were observed in vitro. The addition of the alternative oxidase (AOX) inhibitor salicylhydroxamic acid increased sensitivity in these isolates, suggesting some continued impairment of respiration by the QoI fungicides, albeit weak. Interestingly, amongst those tested, the strains from a site with a high frequency of inserts in the MFS1 transporter gene known to enhance QoI efflux did not exhibit this increase in sensitivity. A total of 19 mtDNA haplotypes were detected amongst the 2017 strain collection. Phylogenetic analysis confirmed the suggestion of a common ancestry of all the haplotypes, even though three of the haplotypes contained at least one sensitive strain

    Boundedness of the Weyl fractional integral on one-sided weighted Lebesgue and Lipschitz spaces

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    In this paper we introduce the one-sided weighted spaces L−w (β), −1 <β< 1. The purpose of this definition is to obtain an extension of the Weyl fractional integral operator I+α from Lp w into a suitable weighted space. Under certain condition on the weight w, we have that L−w (0) coincides with the dual of the Hardy space H1 −(w). We prove for 0 <β< 1, that L− w (β) consists of all functions satisfying a weighted Lipschitz condition. In order to give another characterization of L− w (β), 0 ≤ β < 1, we also prove a one-sided version of John-Nirenberg Inequality. Finally, we obtain necessary and sufficient conditions on the weight w for the boundedness of an extension of I+ α from Lp w into L− w (β), −1 <β< 1, and its extension to a bounded operator from L− w (0) into L− w (α)
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