44 research outputs found

    A sociocultural analysis of the development of pre-service and beginning teachers’ pedagogical identities as users of technology

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    This paper reports on a study that investigated the pedagogical practices and beliefs of pre-service and beginning teachers in integrating technology into the teaching of secondary school mathematics. A case study documents how one teachers modes of working with technology changed over time and across different school contexts, and identifies relationships between a range of personal and contextual factors that influenced the development of his identity as a teacher. This analysis views teachers learning as increasing participation in sociocultural practices, and uses Valsiners concepts of the Zone of Proximal Development, Zone of Free Movement, and Zone of Promoted Action to offer a dynamic way of theorising teacher learning as identity formation

    Espessadores no beneficiamento de minério de ferro

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    Esse trabalho visa a comparar estudos de espessamento realizados em escala industrial com ensaios de sedimentação realizados em escala de bancada e propõe a utilização de fatores de correção nos métodos clássicos de dimensionamento de espessadores convencionais. A prática industrial, no âmbito do tratamento de minérios de ferro no Brasil, tem consolidado uma modificação substancial no método clássico de Kynch (com traçado de Talmage & Fitch), a qual consiste em adotar, para o traçado, a concentração mássica de sólidos na proveta após 24 horas, no lugar da concentração nominal do underflow no espessador industrial. Os ensaios indicam que a área unitária assim obtida ainda deve ser afetada com os fatores de correção. Esse fator, multiplicativo, é de 0,64, para espessadores de lamas, e de 1,3, para espessadores de concentrado fino (pellet feed)

    Measurement of the total cross section and ρ -parameter from elastic scattering in pp collisions at √s=13 TeV with the ATLAS detector

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    In a special run of the LHC with β⋆=2.5 km, proton–proton elastic-scattering events were recorded at s√=13 TeV with an integrated luminosity of 340 μb−1 using the ALFA subdetector of ATLAS in 2016. The elastic cross section was measured differentially in the Mandelstam t variable in the range from −t=2.5⋅10−4 GeV2 to −t=0.46 GeV2 using 6.9 million elastic-scattering candidates. This paper presents measurements of the total cross section σtot, parameters of the nuclear slope, and the ρ-parameter defined as the ratio of the real part to the imaginary part of the elastic-scattering amplitude in the limit t→0. These parameters are determined from a fit to the differential elastic cross section using the optical theorem and different parameterizations of the t-dependence. The results for σtot and ρ are σtot(pp→X)=104.7±1.1 mb ,ρ=0.098±0.011. The uncertainty in σtot is dominated by the luminosity measurement, and in ρ by imperfect knowledge of the detector alignment and by modelling of the nuclear amplitude.publishedVersio

    Risk profiles and one-year outcomes of patients with newly diagnosed atrial fibrillation in India: Insights from the GARFIELD-AF Registry.

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    BACKGROUND: The Global Anticoagulant Registry in the FIELD-Atrial Fibrillation (GARFIELD-AF) is an ongoing prospective noninterventional registry, which is providing important information on the baseline characteristics, treatment patterns, and 1-year outcomes in patients with newly diagnosed non-valvular atrial fibrillation (NVAF). This report describes data from Indian patients recruited in this registry. METHODS AND RESULTS: A total of 52,014 patients with newly diagnosed AF were enrolled globally; of these, 1388 patients were recruited from 26 sites within India (2012-2016). In India, the mean age was 65.8 years at diagnosis of NVAF. Hypertension was the most prevalent risk factor for AF, present in 68.5% of patients from India and in 76.3% of patients globally (P < 0.001). Diabetes and coronary artery disease (CAD) were prevalent in 36.2% and 28.1% of patients as compared with global prevalence of 22.2% and 21.6%, respectively (P < 0.001 for both). Antiplatelet therapy was the most common antithrombotic treatment in India. With increasing stroke risk, however, patients were more likely to receive oral anticoagulant therapy [mainly vitamin K antagonist (VKA)], but average international normalized ratio (INR) was lower among Indian patients [median INR value 1.6 (interquartile range {IQR}: 1.3-2.3) versus 2.3 (IQR 1.8-2.8) (P < 0.001)]. Compared with other countries, patients from India had markedly higher rates of all-cause mortality [7.68 per 100 person-years (95% confidence interval 6.32-9.35) vs 4.34 (4.16-4.53), P < 0.0001], while rates of stroke/systemic embolism and major bleeding were lower after 1 year of follow-up. CONCLUSION: Compared to previously published registries from India, the GARFIELD-AF registry describes clinical profiles and outcomes in Indian patients with AF of a different etiology. The registry data show that compared to the rest of the world, Indian AF patients are younger in age and have more diabetes and CAD. Patients with a higher stroke risk are more likely to receive anticoagulation therapy with VKA but are underdosed compared with the global average in the GARFIELD-AF. CLINICAL TRIAL REGISTRATION-URL: http://www.clinicaltrials.gov. Unique identifier: NCT01090362

    Implementing the WebSocket Protocol Based on Formal Modelling and Automated Code Generation

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    International audienceModel-based software engineering offers several attractive benefits for the implementation of protocols, including automated code generation for different platforms from design-level models. In earlier work, we have proposed a template-based approach using Coloured Petri Net formal models with pragmatic annotations for automated code generation of protocol software. The contribution of this paper is an application of the approach as implemented in the PetriCode tool to obtain protocol software implementing the IETF WebSocket protocol. This demonstrates the scalability of our approach to real protocols. Furthermore, we perform formal verification of the CPN model prior to code generation, and test the implementation for interoperability against the Autobahn WebSocket test-suite resulting in 97% and 99% success rate for the client and server implementation, respectively. The tests show that the cause of test failures were mostly due to local and trivial errors in newly written code-generation templates, and not related to the overall logical operation of the protocol as specified by the CPN model

    The Journal of Human Resources: Vol. 49, No. 4, Fall 2014

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    1. Bullying in elementary school / Tine L.M. Eriksen, Helena S. Nielsen, Marianne Simonsen 2. Estimating heterogeneous take up and crowd-out responses to existing medicaid income limits and their nonmarginal expansions / John C. Ham, Serkan Ozbelik, Lara D. Shore-Sheppard 3. Ability, parental valuation of education, and the high school dropout decision / Kelly Foley, Giovanni Gallipoli, David A. Green 4. Teacher pay reform and productivity: panel data evidence from adoptions of Q-Comp in minnesota / Aaron J. Sojourner, Elton Mykerezi, Kristine L. West 5. Staying for benefits: the effect of a health and family planning program on out-migration pattern in Bangladesh / Tania Barham, Randal Kuhn 6. Saving lives: evidence from a conditional food supplementation program / Marian Meller, Stephan Litschig 7. Do religious proscriptios matter? evidence from a theory-based test / Daniel M. Hungerman 8. Is Smoking inferior? evidence from variation in the earned income Tax Credit / Donald S. Kenkel, Maximilian D. Schmeiser, Carly Urba

    Hippocratic Oath, 21st Century

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    Structural and functional studies of trans-encoded HLA-DQ2.3 (DQA1*03:01/DQB1*02:01) protein molecule

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    10.1074/jbc.M111.320374Journal of Biological Chemistry2871713611-13619JBCH
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