Quarkonium production at ATLAS

The production of quarkonium is an important testing ground for QCD calculations. The J/\psi\ and \Upsilon\ production cross-sections are measured in proton-proton collisions at a centre-of-mass energy of 7~TeV with the ATLAS detector at the LHC. Differential cross-sections are presented as a function of transverse momentum and rapidity. The fraction of J/\psi\ produced in B-hadron decays is also measured and the differential cross-sections of prompt and non-prompt J/\psi\ production determined separately. Measurements of the fiducial production cross-section of the \Upsilon(1S) and observation of the \chi_{c,bJ} states are also discussed.Comment: Presented at the 2011 Hadron Collider Physics symposium (HCP-2011), Paris, France, November 14-18 2011, 3 pages, 8 figure

W/Z properties and V+jets at the Tevatron

We present a summary of recent measurements of $W$ and $Z$ properties and $W/Z$ production in association with jets in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV with the CDF and D\O\ detectors. Latest measurements of $Z/\gamma^*$ transverse momentum and are presented along with new measurements of the angular distributions of final state electrons from Drell Yan events as a way to probe $Z$ boson production mechanisms. The mass dependence of the forward-backward asymmetry in $p\bar{p} \rightarrow Z/\gamma^{*} \rightarrow e^+e^-$ interactions is measured, the effective weak mixing angle extracted, and the most precise direct measurement of the vector and axial-vector couplings of $u$ and $d$ quarks to the $Z$ boson presented. New measurements of jets produced in association with $Z$ and $W$ bosons for inclusive, beauty and charm jets are also discussed.Comment: Presented at the 2011 Hadron Collider Physics symposium (HCP-2011), Paris, France, November 14-18 2011, 4 pages, 13 figure

Production of charm and charmonium with the ATLAS detector at 7 TeV

We report on the observation of the charm mesons D^\ast \pm, D^\pm and D_s ^\pm with 1.4 nb^-1 of data, and of the J/psi-->mu+mu- resonance with 78 nb-1 of data from the ATLAS detector in 7 TeV proton-proton collisions at the LHC. The resultant signals support the high performance of the ATLAS detector as predicted from simulation and prospects for future measurements in the charm and charmonium sector.Comment: 4 pages, 11 figure

Teacher Efficacy & Institutional Change with 1:1 Technology Initiatives in East Asia

The purpose of this study was to explore the relationship between teachers\u27 sense of efficacy and a change initiative that challenged teachers\u27 current classroom practice. This study focused on 1:1 technology implementations in international schools from the East Asia Regional Council of Overseas Schools (EARCOS). The study also explored the relationship between teachers\u27 sense of efficacy and their perceptions of the effectiveness of certain professional development formats. Teacher efficacy was defined using Tschannen-Moran and Woolfolk Hoy\u27s (1998) integrated model, which included teachers\u27 ability to control the outcomes and their self-perceived competency to accomplish the desired outcomes. Data was collected from 234 participants in 14 EARCOS schools located in China, Japan, and South Korea. Participants were currently teaching at least one class of students in grades 6-12 with 1:1 technology access. The Teachers\u27 Sense of Efficacy Scale was used to measure teacher efficacy in classroom management, instructional strategies, and student engagement. The data analysis was separated into two strands. The first strand considered the relationship between teacher efficacy and experience, and the second evaluated teacher efficacy in relation to the perceived effectiveness of professional development formats. In regard to experience, multiple regression analysis evaluated significant relationships between teacher efficacy and the independent variables of 1:1 technology classroom teaching experience, age, general classroom teaching experience, gender, grade level(s) taught, passport nationality, subject(s) taught, and the type of 1:1 technology device in the classroom. In regard to professional development, multiple regression analysis and a one-way ANOVA was used to evaluate relationships between teacher efficacy and the perceived effectiveness ratings of the identified professional development formats. The findings indicated that more experienced teachers demonstrated stronger teacher efficacy in instructional strategies and student engagement during a 1:1 technology implementation. The findings also showed that women had stronger efficacy in classroom management and student engagement than men. The multiple regression analysis found a strong significance between the perceived effectiveness of hands on workshops and teacher efficacy. The one-way ANOVA found significant relationships with 5 of the 8 professional development formats. The study also noted that many professional development formats were absent from teachers\u27 experience

The Docking Stage of Yeast Vacuole Fusion Requires the Transfer of Proteins from a Cis-Snare Complex to a Rab/Ypt Protein

The homotypic fusion of yeast vacuoles requires Sec18p (NSF)-driven priming to allow vacuole docking, but the mechanism that links priming and docking is unknown. We find that a large multisubunit protein called the Vam2/6p complex is bound to cis-paired SNAP receptors (SNAREs) on isolated vacuoles. This association of the Vam2/6p complex with the cis-SNARE complex is disrupted during priming. The Vam2/6p complex then binds to Ypt7p, a guanosine triphosphate binding protein of the Rab family, to initiate productive contact between vacuoles. Thus, cis-SNARE complexes can contain Rab/Ypt effectors, and these effectors can be mobilized by NSF/Sec18p-driven priming, allowing their direct association with a Rab/Ypt protein to activate docking

The frequency, characteristics and aetiology of stroke mimic presentations::a narrative review

A significant proportion of patients with acute stroke symptoms have an alternative ‘mimic’ diagnosis. A narrative review was carried out to explore the frequency, characteristics and aetiology of stroke mimics. Prehospital and thrombolysis-treated patients were described separately. Overall, 9972 studies were identified from the initial search and 79 studies were included with a median stroke mimic rate of 19% (range: 1–64%). The prehospital median was 27% (range: 4–43%) and the thrombolysis median 10% (range: 1–25%). Seizures, migraines and psychiatric disorders are the most frequently reported causes of stroke mimics. Several characteristics are consistently associated with stroke mimics; however, they do not fully exclude the possibility of stroke. Nineteen per cent of suspected stroke patients had a mimic condition. Stroke mimics were more common with younger age and female sex. The range of mimic diagnoses, a lack of clear differentiating characteristics and the short treatment window for ischaemic stroke create challenges for early identification