867 research outputs found

    Values in Mathematics and Science Education: similarities and differences

    Get PDF
    literacy and expertise from their citizens than ever before. At the heart of such demands is the need for greater engagement by students with school mathematics and science. As the OECD/PISA definition of numeracy puts it: “Mathematical literacy is an individual’s capacity to identify and understand the role that mathematics plays in the world, to make well-founded judgements and to use and engage with mathematics in ways that meet the needs of that individual’s life as a constructive, concerned and reflective citizen”(OECD, 2003) Values are an inherent part of the educational process at all levels, from the systemic, institutional macro-level, through the meso-level of curriculum development and management, to the microlevel of classroom interactions (Le Métais, 1997) where they play a major role in establishing a sense of personal and social identity for the student. However the notion of studying values in mathematics education is a relatively recent phenomenon (Bishop, 1999). According to Chin, Leu, and Lin (2001), the values portrayed by teachers in mathematics classrooms are linked to their pedagogical identities. Seah and Bishop (2001) describe the values held by teachers as representing their \u27cognisation\u27 of affective variables such as beliefs and attitudes, and the subsequent internalisation of these values into their respective affective-cognitive personal system

    Aspectos sociales y culturales de la educación matemática

    Get PDF
    Este artículo trata sobre dos campos de investigación que han contribuido. Revisar la enseñanza de las matemáticas en la última década: aquellos relacionados con los aspectos sociales y culturales de la educación matemática

    Non-Hermitian description of a superconducting phase qubit measurement

    Full text link
    We present an approach based on a non-Hermitian Hamiltonian to describe the process of measurement by tunneling of a phase qubit state. We derive simple analytical expressions which describe the dynamics of measurement, and compare our results with those experimentally available.Comment: 8 pages, 4 figure

    Sparse matrix-vector multiplication on GPGPU clusters: A new storage format and a scalable implementation

    Get PDF
    Sparse matrix-vector multiplication (spMVM) is the dominant operation in many sparse solvers. We investigate performance properties of spMVM with matrices of various sparsity patterns on the nVidia "Fermi" class of GPGPUs. A new "padded jagged diagonals storage" (pJDS) format is proposed which may substantially reduce the memory overhead intrinsic to the widespread ELLPACK-R scheme. In our test scenarios the pJDS format cuts the overall spMVM memory footprint on the GPGPU by up to 70%, and achieves 95% to 130% of the ELLPACK-R performance. Using a suitable performance model we identify performance bottlenecks on the node level that invalidate some types of matrix structures for efficient multi-GPGPU parallelization. For appropriate sparsity patterns we extend previous work on distributed-memory parallel spMVM to demonstrate a scalable hybrid MPI-GPGPU code, achieving efficient overlap of communication and computation.Comment: 10 pages, 5 figures. Added reference to other recent sparse matrix format

    On the geometric boundaries of hyperbolic 4-manifolds

    Full text link
    We provide, for hyperbolic and flat 3-manifolds, obstructions to bounding hyperbolic 4-manifolds, thus resolving in the negative a question of Farrell and Zdravkovska.Comment: 8 pages. Published copy, also available at http://www.maths.warwick.ac.uk/gt/GTVol4/paper5.abs.htm
    corecore