Results 71 to 80 of about 76,092 (311)

Development of scientific-based interactive multimedia with polyhedron material

open access: yesJournal Focus Action of Research Mathematic
Penelitian ini bertujuan untuk mengembangkan multimedia interaktif berbasis saintifik dengan materi bangun ruang sisi datar. Lima langkah Model pengembangan ADDIE— Analysis, Design, Development, Implementation, dan Evaluation — digunakan sebagai prosedur
Rosa Fachma Rani   +3 more
doaj   +1 more source

Approximation of corner polyhedra with families of intersection cuts

open access: yes, 2017
We study the problem of approximating the corner polyhedron using intersection cuts derived from families of lattice-free sets in $\mathbb{R}^n$. In particular, we look at the problem of characterizing families that approximate the corner polyhedron up ...
A Basu   +12 more
core   +1 more source

Subdivision algorithms and the kernel of a polyhedron [PDF]

open access: yesDiscrete & Computational Geometry, 1992
The Fejes-Tóth kernel of a complex polytope is the limiting set obtained when iteratively taking the convex hull of the midpoints of all edges (midpoint process). It is shown that in dimension 3 this kernel has no 2-dimensional faces, that the centroids of all facets obtained during the iterations is dense in the kernel's boundary, and that this ...
M. Kallay, Richard J. Gardner
openaire   +3 more sources

Remodeling Interfacial Electrical Field for Superhigh Capacity and Ultralong Lifespan Aqueous Zinc‐Ion Batteries

open access: yesAdvanced Functional Materials, EarlyView.
The design of cathode materials is the key to solving the practical application of AZIBs. In this work, the formation of the built‐in electric field in the NVO@CC material adjusts the electronic structure, showing high specific capacity and ultra‐long cycle stability, and achieving rapid diffusion of ions and good electrochemical kinetics.
Yan Ran   +7 more
wiley   +1 more source

Volume Polynomials for Some Polyhedra in Spaces of Constant Curvature

open access: yesМоделирование и анализ информационных систем, 2012
It is known that for each simplicial polyhedron P in 3-space there exists a monic polynomial Q depending on the combinatorial structure of P and the lengths of its edges only such that the volume of the polyhedron P as well as one of any polyhedron ...
D. I. Sabitov, I. Kh. Sabitov
doaj   +3 more sources

Existence and regularity of solutions for Stokes systems with non-smooth boundary data in a polyhedron

open access: yesElectronic Journal of Differential Equations, 2017
The Stokes problem is fundamental in the study of fluid flows. In the case of smooth domains and data, this problem is extensively studied in the literature. But there are only a few results for non-smooth boundary data.
Houria Adjal   +2 more
doaj  

Pembelajaran Luas Permukaan Bangun Ruang Sisi Datar Menggunakan Pendekatan Pendidikan Matematika Realistik Indonesia

open access: yesJurnal Elemen, 2020
One of the geometry subjects that has a high level of difficulty and abstractness is the 3D-shape subject (solid geometry), especially the surface area of a polyhedron.
Siti Maisyarah   +1 more
doaj  

Lower algebraic K-theory of certain reflection groups

open access: yes, 2009
For a finite volume geodesic polyhedron P in hyperbolic 3-space, with the property that all interior angles between incident faces are integral submultiples of Pi, there is a naturally associated Coxeter group generated by reflections in the faces ...
Bass   +13 more
core   +1 more source

Ce3+‐Activated Lithium Rare‐Earth Oxonitridolithosilicates: A New Class of LED Phosphors with Similarities to Garnets

open access: yesAdvanced Functional Materials, EarlyView.
Garnet‐like luminescence upon Ce3+‐activation is found in the first six representatives Li9RESi4N4O8 (RE = Y, La, Gd, Dy, Yb, Lu) of the substance class of lithium rare‐earth oxonitridolithosilicates, which also show a novel structure type. High‐temperature solid‐state synthesis yielded crystalline samples for single‐crystal X‐ray diffraction‐based ...
Kilian M. Rießbeck   +5 more
wiley   +1 more source

Synthetic Aspects and Characterization Needs in MOF Chemistry – from Discovery to Applications

open access: yesAdvanced Materials, EarlyView.
Overcoming the challenges of phase discovery, synthesis optimization and scale‐up, characterization, and computational studies is essential to accelerate the large‐scale application of MOFs. Life‐cycle analyses and techno‐economic analyses need to be performed to realistically assess their potential for industrial relevance.
Bastian Achenbach   +4 more
wiley   +1 more source

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