Results 21 to 30 of about 57,891 (290)
Wall-crossing, free fermions and crystal melting [PDF]
, 2010 We describe wall-crossing for local, toric Calabi-Yau manifolds without compact four-cycles, in terms of free fermions, vertex operators, and crystal melting. Firstly, to each such manifold we associate two states in the free fermion Hilbert space.
A. Iqbal +19 more
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Study of Virtual Reality Immersive Technology Enhanced Mathematics Geometry Learning
Frontiers in Psychology, 2022 Mathematics is an important foundation for the development of science education. In the past, when instructors taught mathematical concepts of geometry shapes, they usually used traditional textbooks and aids to conduct teaching activities, which ...
Yu-Sheng Su +2 more
doaj +1 more source
Acta Crystallographica Section E, 2011 The dinuclear title complex, [Mg2(C19H40N3Si2)2Cl2(C4H8O)2], lies on a center of inversion. The Mg2+ ions are bonded to a chelating N,N′-bonded guanidinate anion, a tetrahydrofuran molecule and two bridging chloride anions.
Jie Cheng
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Serendipity and Tensor Product Affine Pyramid Finite Elements [PDF]
, 2016 Using the language of finite element exterior calculus, we define two families of $H^1$-conforming finite element spaces over pyramids with a parallelogram base.
Gillette, Andrew
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Acta Crystallographica Section E, 2009 The dinuclear title compound, [Zn2(C3H6NS2)4(C12H10N2)], features two five-coordinate Zn atoms, one with an NS4 coordination geometry distorted towards a trigonal-bipyramidal arrangement, and the other distorted towards a square pyramid.
Pavel Poplaukhin, Edward R. T. Tiekink
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Fundamental Physics and the Fine-Structure Constant [PDF]
, 2016 From the exponential function of Euler’s equation to the geometry of a fundamental form, a calculation of the fine-structure constant and its relationship to the proton-electron mass ratio is given.
Sherbon, Michael A.
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Acta Crystallographica Section E, 2009 The dinuclear title compound, [Zn2(C7H14NS2)4(C12H10N2)], is centrosymmetric about the central C=C bond. The five-coordinate Zn atom is bonded to two asymmetrically chelating dithiocarbamate ligands and a pyridine N atom to define an NS4 coordination ...
Hadi D. Arman +2 more
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Inverted pyramid Azores - an eternal hybrid structure
Structural Mechanics of Engineering Constructions and Buildings, 2021 Engineering structures are designed with observation of rules for structural performance under specific design loads, defined in the so-called structural codes. While dead loads are directly dependent from the selection of structural materials to a given
Luís Pedro F R Sarmento Esteves
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Teaching in the Montessori Classroom: Investigating Variation Theory and Embodiment as a Foundation of Teachers’ Development [PDF]
, 2020 The theory of Montessori education has been interpreted by some researchers to be vaguely formulated. However, as shown in previous research, Maria Montessori’s didactic approach to teaching and learning mathematics is fully consistent with variation ...
Ahlquist, Eva-Maria Tebano +1 more
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Laser cooling with a single laser beam and a planar diffractor
, 2010 A planar triplet of diffraction gratings is used to transform a single laser beam into a four-beam tetrahedral magneto-optical trap. This `flat' pyramid diffractor geometry is ideal for future microfabrication.
Arnold, Aidan S. +3 more
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