Results 111 to 120 of about 51,397 (286)
British Journal of Developmental Psychology, EarlyView.Abstract Acquiring mathematical competence is essential to independent living. In this study, we investigated the mathematics profile in young people with Down syndrome (DS), and the relations between foundational and more complex mathematics skills.
Su Morris +2 more
wiley +1 more source
British Journal of Educational Psychology, EarlyView.Abstract Background Conceptual and procedural knowledge are two distinct types of mathematical knowledge. Measuring them with sufficient discriminant validity is challenging because they are typically highly correlated. Prior studies have demonstrated discriminant validity of paper‐and‐pencil measures separately for fractions and algebra.
Michael D'Erchie +3 more
wiley +1 more source
Computing Skinning Weights via Convex Duality
Computer Graphics Forum, EarlyView.We present an alternate optimization method to compute bounded biharmonic skinning weights. Our method relies on a dual formulation, which can be optimized with a nonnegative linear least squares setup. Abstract We study the problem of optimising for skinning weights through the lens of convex duality.
J. Solomon, O. Stein
wiley +1 more source
Algebraic Numbers in Symbolic Computations
, 1998 There are many good reasons to teach a course on a systematic introduction to symbolic methods not only to students of mathematics but also to those of technical sciences. The design of such a course meets an essential difficulty since the principles to be demonstrated appear only in non trivial applications in a convincing way, but there is no time to
openaire +1 more source
Progressively Projected Newton's Method
Computer Graphics Forum, EarlyView.Abstract Newton's Method is widely used to find the solution of complex non‐linear simulation problems. To guarantee a descent direction, it is common practice to clamp the negative eigenvalues of each element Hessian prior to assembly—a strategy known as Projected Newton (PN)—but this perturbation often hinders convergence.
J. A. Fernández‐Fernández +2 more
wiley +1 more source
REDUCED ISOTROPIC CRYSTAL MODEL WITH RESPECT TO THE FOURTH-ORDER ELASTIC MODULI
East European Journal of Physics, 2018 Using a reduced isotropic crystal model the relationship between the fourth-order elastic moduli of an isotropic medium and the independent components of the fourth-order elastic moduli tensor of real crystals of various crystal systems is found.
O. Burlayenko, V. Khodusov, A. Naumovets
doaj
Special issue on symbolic and algebraic computation
Journal of Symbolic Computation, 2009 Carlos D'Andrea, Bernard Mourrain
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Symbolic computations over the algebra of coquaternions
, 2019 Coquaternions, introduced by Sir James Cockle in 1849, form a four dimensional real algebra generalizing complex numbers. In recent years one can observe an emerging interest among mathematicians and physicists on the study of these numbers. In this work we present a Mathematica package for implementing the algebra of coquaternions.
Falcão, M. I. +3 more
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Ecography, EarlyView.Understanding the mechanisms controlling community diversity is a central, topic in ecology, particularly in microbial ecology. Although species pools and local assembly processes are believed to play non‐negligible roles in shaping the within‐community (α) and among‐community (β) diversity of microbial communities, their relative importance as ...
Xiao Zhang +10 more
wiley +1 more source
Building a Potemkin village in occupied China: Japan's wartime system of linked trade, 1939–43
The Economic History Review, EarlyView.Abstract The paper discusses the novel but little‐known exchange rate system of Japanese‐occupied North China during the Second Sino‐Japanese War, in which exporters were given the right to import in the form of a piece of yellow paper, which could be sold in the secondary market.
Shinji Takagi
wiley +1 more source