Results 21 to 30 of about 15,432 (253)
BMC Research Notes, 2011 Background Previous studies showed an inter-observer agreement for the NYHA classification of approximately 55%. The aim of this study was to calibrate the New York Heart Association (NYHA) classification system between observers, increasing its ...
Bettencourt Paulo +5 more
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Formalized Mathematics, 2017 SummaryIn this article we formalize several basic theorems that correspond to Pell’s equation. We focus on two aspects: that the Pell’s equationx2−Dy2= 1 has infinitely many solutions in positive integers for a givenDnot being a perfect square, and that based on the least fundamental solution of the equation when we can simply calculate algebraically ...
Marcin Acewicz, Karol Pak
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On reducing a system of equations to a single equation
Proceedings of the 2004 international symposium on Symbolic and algebraic computation, 2004 For a system of polynomial equations over Q_p we present an efficient construction of a single polynomial of quite small degree whose zero set over Q_p coincides with the zero set over Q_p of the original system. We also show that the polynomial has some other attractive features such as low additive and straight-line complexity.<br /> <br ...
Gudmund Skovbjerg Frandsen +1 more
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European Physical Journal C: Particles and Fields, 2023 We wonder if there is a way to make all Schur functions in all representations equal. This is impossible for fixed value of time variables, but can be achieved for averages.
A. Morozov
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The Impact of Equating on Detection of Treatment Effects [PDF]
, 2019 Equating makes it possible to compare performances on different forms of a test. Three different equating methods (baseline selection, subgroup, and subscore equating) using common-item item response theory equating were examined for their impact on ...
Lu, Zhenqiu +3 more
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Frontiers in Psychology, 2019 The increasing digitalization in the field of psychological and educational testing opens up new opportunities to innovate assessments in many respects (e.g., new item formats, flexible test assembly, efficient data handling). In particular, computerized
Sebastian Born +4 more
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A Comparison of Covariates, Equating Designs, and Methods in Equating TIMSS 2019 Science Tests [PDF]
, 2023 This research aimed to compare the equated scores by the methods based on classical test theory (CTT) and kernel equating, using covariates design (NEC) and anchor test design (NEAT).
Sezer Başaran, Elif +5 more
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IRT Observed-score Kernel Equating
, 2014 Item response theory (IRT) observed-score kernel equating is described for thenon-equivalent groups with anchor test equating design using either chain equating orpost-stratification equating.
Andersson, Björn, Wiberg, Marie
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Comparison of several small sample equating methods under the NEAT design
Turkish Journal of Education, 2016 The aim of this study is to compare the performances of Identity, Nominal Weights Mean, and Circle-Arc equating methods under the Non-Equivalent Groups Anchor-Test (NEAT) design.
Serdar Caglak
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Proceedings of the National Academy of Sciences, 1957 Beweis zweier Sätze, die gestatten, auf die Stetigkeit der Lösungen parabolischer (elliptischer) Differentialgleichungen zu schließen, wenn die Lösung für \(t=0\) (auf dem Rande) beschränkt sein soll.
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