261 research outputs found

    Hyvä tarkoitus, epämääräiset käsitteet : tarkkuutta kolonialismin ja vähemmistöjen tutkimukseen

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    Kenen historia? : raportti monipuolisen historiantutkimuksen, -opetuksen ja vuoropuhelun tilasta ja haasteista Suomessa / Helsinki : Historians without Borders in Finland, 2018

    Kolonialismi-keskustelun häivytetyt ristiriidat ja liberaalidemokratian tulevaisuus

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    Viime aikoina Suomessa on virinnyt kiinnostava keskustelu kolonialismista ja useista siihen läheisesti liittyvistä käsitteistä

    Olisiko jo aika tutkia esineitä? : kohti uutta tutkimusparadigmaa

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    Esinekeskeisyys ja toimijuus vakiintumassa

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    Uusimman ajan aateliseliitti

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    Arvosteltu teos: Aristocracy and the modern world / Ellis Wasson. Basingstoke : Palgrave Macmillan, 2006

    Emanuel Thelningin maapäivämaalaus ja Porvoon tapahtumat

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    Aatelin tutkimus Suomessa

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    Mitä uutta aatelista?

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    Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions

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    At sufficiently high temperature and energy density, nuclear matter undergoes a transition to a phase in which quarks and gluons are not confined: the quark-gluon plasma (QGP)(1). Such an exotic state of strongly interacting quantum chromodynamics matter is produced in the laboratory in heavy nuclei high-energy collisions, where an enhanced production of strange hadrons is observed(2-6). Strangeness enhancement, originally proposed as a signature of QGP formation in nuclear collisions(7), is more pronounced for multi-strange baryons. Several effects typical of heavy-ion phenomenology have been observed in high-multiplicity proton-proton (pp) collisions(8,9), but the enhanced production of multi-strange particles has not been reported so far. Here we present the first observation of strangeness enhancement in high-multiplicity proton-proton collisions. We find that the integrated yields of strange and multi-strange particles, relative to pions, increases significantly with the event charged-particle multiplicity. The measurements are in remarkable agreement with the p-Pb collision results(10,11), indicating that the phenomenon is related to the final system created in the collision. In high-multiplicity events strangeness production reaches values similar to those observed in Pb-Pb collisions, where a QGP is formed.Peer reviewe
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