Results 131 to 140 of about 2,171 (226)
Congruence theorems for quadrilaterals
, 2017 In this article we will prove new criterions for the congruence of convex quadrilaterals.
LAUDANO, Francesco, VINCENZI, Giovanni
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EXPLORING CYCLIC QUADRILATERALS WITH PERPENDICULAR DIAGONALS
, 2020 After a brief discussion of two preliminary activities, the author presents three student explorations about cyclic quadrilaterals with perpendicular diagonals and an extension to cyclical quadrilaterals.
Alfinio Flores
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Advanced Science, EarlyView.This study first extends the high‐entropy concept to I‐III‐VI quantum dots (QDs) and synthesizes CZCrGSe/ZnSe/ZnS core/shell/shell QDs with a record photoluminescence quantum yield (PLQY) of 100%. Their ZnSe/ZnS double shell efficiently passivates defects and boosts structural stability.
Maoyuan Huang +9 more
wiley +1 more source
ON THE STRUCTURE OF FINITE PSEUDO- COMPLEMENTS OF QUADRILATERALS AND THEIR EMBEDDABILITY [PDF]
Journal of Sciences, Islamic Republic of Iran, 1993 A pseudo-complement of a quadrilateral D of order n, n, > 3, is a non-trivial (n+l)- regular linear space with n - 3n + 3 points and n + n - 3 lines. We prove that if n > 18 and D has at least one line of size n - 1, or if n > 25 , then the set of lines
doaj
Primary trainee teachers’ understanding of basic geometrical figures in Scotland
, 2006 Whilst teachers’ mathematics knowledge is known to play a significant role in shaping the quality of their teaching, much less is known about the nature and extent of that knowledge, how it develops, and how such development can be supported through ...
Fujita, Taro, Jones, Keith
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Advanced Science, EarlyView.Defect‐configurational origins of the asymmetric apparent electrostrain are revealed in different piezoelectric ceramics via atomic‐scale visualization of defect configurations. Migration of oxygen vacancies leads to the electrobending effect in N2‐sintered BaTiO3, while defect dipoles in Ba0.99TiO2.99 generate true asymmetric electrostrain without ...
Jie Wang +7 more
wiley +1 more source
Engineering ReportsIn this article, we integrate the template method and the mapping method to propose a new approach for generating quadrilateral meshes with controllable density transitions for planar geometric models.
Yize Li, Qingyuan Hu, Gengdong Cheng
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Advanced Science, EarlyView.Herein, we demonstrate a breakthrough in dielectric energy storage by engineering local polarization units in high‐entropy multilayer ceramic capacitors (MLCCs). The optimized MLCCs achieve an ultrahigh recoverable energy density of 18.2 J cm−3 with 91% efficiency, coupled with exceptional thermal stability and fatigue resistance.
Shiyu Zhou +11 more
wiley +1 more source
Flexoelectricity in Photoconversion: Fundamentals, Materials, and Outlooks
Advanced Science, EarlyView.Mechanical bending of a flexible cantilever induces a strain gradient in the photoactive material. The resulting flexoelectric field couples with photovoltaic and photoconductive effects, modulating charge generation, separation, and collection. A comparative analysis of oxide perovskites, halide perovskites, and two‐dimensional materials is presented,
Xiang Huang, Feng Li, Rongkun Zheng
wiley +1 more source
Evaluation of Preservice Elementary Teachers’ Concept Images for Quadrilaterals
, 2013 The aim of this study was to determine preservice elementary teachers\u27 images for some special quadrilaterals. The case study was conducted with 6 preservice elementary teachers.
Zeynep Erşen, Fatih Karakuş
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