TRIUMF

About: TRIUMF is a facility organization based out in Vancouver, British Columbia, Canada. It is known for research contribution in the topics: Large Hadron Collider & Neutron. The organization has 3306 authors who have published 5770 publications receiving 212931 citations. The organization is also known as: TRI University Meson Facility.

Muon-spin-resonance study of muonium dynamics in Si and its relevance to hydrogen.

Abstract: The dynamics of transitions among muonium (Mu) states in Si have been studied by radio-frequency (rf) muon-spin-resonance techniques. A total of ten samples doped to roughly ${10}^{15}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$ p type and to ${10}^{16}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$ n type were investigated at temperatures from 10 to 500 K. The normalized rf asymmetry for the ionized center in the p-type samples is well described by a three-state strong-collision model involving ${\mathrm{Mu}}_{\mathrm{BC}}^{+}$, ${\mathrm{Mu}}_{\mathrm{BC}}^{0}$, and ${\mathrm{Mu}}_{\mathit{T}}^{0}$. Addition of ${\mathrm{Mu}}_{\mathit{T}}^{\mathrm{\ensuremath{-}}}$ and related transitions complicates the model for intermediate n-type concentrations; however, at higher n-type levels a modified three-state model with ${\mathrm{Mu}}_{\mathit{T}}^{\mathrm{\ensuremath{-}}}$ replacing ${\mathrm{Mu}}_{\mathrm{BC}}^{+}$ successfully describes the charged-state intensities. Observed features are assigned to seven separate transition processes and a single set of parameters, obtained primarily from fits to two samples, provide an excellent description over the full doping range. The Mu results correlate well with the few analogous hydrogen measurements and imply rapid transitions among several hydrogen states under typical experimental conditions.

Pten (phosphatase and tensin homologue gene) haploinsufficiency promotes insulin hypersensitivity

Abstract: Aims/hypothesis Insulin controls glucose metabolism via multiple signalling pathways, including the phosphatidylinositol 3-kinase (PI3K) pathway in muscle and adipose tissue. The protein/lipid phosphatase Pten (phosphatase and tensin homologue deleted on chromosome 10) attenuates PI3K signalling by dephosphorylating the phosphatidylinositol 3,4,5-trisphosphate generated by PI3K. The current study was aimed at investigating the effect of haploinsufficiency for Pten on insulin-stimulated glucose uptake.

Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s=7 TeV using the ATLAS detector.

Abstract: This Letter presents measurements of the polarization of the top quark in top-antitop quark pair events, using 4: 7 fb(-1) of proton-proton collision data recorded with the ATLAS detector at the La ...