Search results for "Section"
showing 5 items of 7305 documents
Use-wear analysis applied in a dissected palimpsest at the Middle Palaeolithic site of El Salt (eastern Iberia): working with lithic tools in a narro…
2023
Los análisis de uso-desgaste son muy útiles para aumentar el conocimiento sobre las dinámicas económicas y de subsistencia llevadas a cabo por los neandertales. En términos generales, los resultados funcionales provienen tradicionalmente del análisis de herramientas pertenecientes a unidades estratigráficas cuya escala temporal se refiere al tiempo geológico. Esto se debe a que muchos yacimientos neandertales son palimpsestos de ocupaciones reiteradas a lo largo del tiempo, que deben ser diseccionadas para acercarnos a la escala temporal humana. En la unidad estratigráfica Xa de El Salt (Alcoi, este de Iberia) se han llevado a cabo estudios arqueoestratigráficos de alta resolución temporal.…
Search for inelastic scattering of WIMP dark matter in XENON1T
2021
We report the results of a search for the inelastic scattering of weakly interacting massive particles (WIMPs) in the XENON1T dark matter experiment. Scattering off $^{129}$Xe is the most sensitive probe of inelastic WIMP interactions, with a signature of a 39.6 keV de-excitation photon detected simultaneously with the nuclear recoil. Using an exposure of 0.89 tonne-years, we find no evidence of inelastic WIMP scattering with a significance of more than 2$\sigma$. A profile-likelihood ratio analysis is used to set upper limits on the cross-section of WIMP-nucleus interactions. We exclude new parameter space for WIMPs heavier than 100 GeV/c${}^2$, with the strongest upper limit of $3.3 \time…
Pacienta drošība ķeizargrieziena operācijas operatīvajā periodā
2021
Bakalaura darba tēma: pacienta drošība ķeizargrieziena operācijas operatīvajā periodā. Tēmas aktualitāti pamato: ķeizargrieziena operāciju skaita pieaugums. Darba mērķis: noskaidrot pacienta drošību ķeizargrieziena operācijas operatīvajā periodā. Pētniecības uzdevumi: 1.apkopot un analizēt zinātnisko literatūru par pacientu drošību ķeizargrieziena operācijas operatīvajā periodā; 2.izstrādāt pētījumam novērojuma un intervijas protokolu; 3.veikt strukturētu novērošanu un intervēšanu, datu apkopošanu; 4.apkopot visus pētījumā iegūtos rezultātus; 5.izstrādāt secinājumus. Izvirzītais pētniecības jautājums: kāda ir pacienta drošība ķeizargrieziena operācijas operatīvajā periodā? Pētniecības metod…
Search for the Decay of the Higgs Boson to Charm Quarks with the ATLAS Experiment
2018
A direct search for the standard model Higgs boson decaying to a pair of charm quarks is presented. Associated production of the Higgs and Z bosons, in the decay mode ZH→ℓ+ℓ−c¯c is studied. A data set with an integrated luminosity of 36.1 fb−1 of pp collisions at √s=13TeV recorded by the ATLAS experiment at the LHC is used. The H→c¯c signature is identified using charm-tagging algorithms. The observed (expected) upper limit on σ(pp→ZH)×B(H→c¯c) is 2.7 (3.9+2.1−1.1) pb at the 95% confidence level for a Higgs boson mass of 125 GeV, while the standard model value is 26 fb.
Some characterisations of groups in which normality is a transitive relation by means of subgroup embedding properties
2018
[EN] In this survey we highlight the relations between some subgroup embedding properties that characterise groups in which normality is a transitive relation in certain universes of groups with some finiteness properties.