Results 101 to 110 of about 4,375 (273)
We solve the following problem of W.H. Besant using a formula for the coefficients of an ellipse inscribed in a quadrilateral, $Q$: \enquote{If an ellipse be inscribed in a quadrilateral so that one focus is equidistant from the four vertices(call that point $EP$), the other focus must be at the intersection of the diagonals(call that point $IP$).} We ...
openaire +2 more sources
On quadrilaterals with integer sides
, 2010 Many different solutions have been given on the problem of finding the number of noncongruent triangles with integer sides and a given perimeter. Jordan, Walch and Wisner in their article entitled Triangles with Integer Sides , which appeared in the ...
Ando, Miki, Uy, Joann Yu
core
Advanced Science, EarlyView.Magnetoelectric nanoparticles (MENPs) enable fully wireless, minutely invasive neuromodulation, and potentially neural recording, by converting magnetic into electric and, conversely, electric into magnetic fields, respectively, at high spatiotemporal resolution.
Elric Zhang +14 more
wiley +1 more source
Interactive teaching materials based on scientific approach: triangles and quadrilaterals
SHS Web of Conferences, 2018 One of the Indonesian government’s efforts to improve the quality of education is by changing the curriculum. Currently the Curriculum 2013 is being implemented in schools.
Pujiastuti Heni
doaj +1 more source
On triangles and quadrilaterals of groups
, 2006 This dissertation demonstrates the existence of a pair of algebraic and geometric structures on triangles of groups and on quadrilaterals of groups. These structures are an automatic and biautomatic structure.
Lynch, Keith
core
Butterfly theorem and porism on cyclic quadrilaterals [PDF]
, 2018 We give a short overview of the geometry of quadrilaterals including complex quadrilaterals with special emphasis on cyclic quadrilaterals and butterfly theorems. The main aim is to study the proof by Ivan Izmestiev of a porism for cyclic quadrilaterals
Tomažič, Marina
core
Engineering of Crystal and Domain Structures in Epitaxial Y:HfO2 Thin Films by YSZ Substrate Miscut
Advanced Science, EarlyView.We investigate how YSZ substrate miscut influences crystal structure and domain formation in epitaxial Y‐doped HfO2 thin films. Using magnetron sputtering, high‐resolution X‐ray diffraction, atomic‐resolution scanning transmission electron microscopy, and first‐principles calculations, we systematically examine the characteristics of thickness‐ and ...
Jun Young Lee +12 more
wiley +1 more source
Broadening Hard‐Magnet Discovery Beyond Symmetry Constraints via Unified Effective Anisotropy
Advanced Science, EarlyView.A unified effective‐anisotropy descriptor (Keff) extends hard‐magnet screening across all seven crystal systems, beyond the uniaxial restriction of conventional searches. Machine‐learning screening of 9320 known ferromagnets and diffusion‐model generation together yield 38 rare‐earth‐free or ‐lean candidates with DFT‐validated magnetic hardness (κ > 1),
Hojae Kim +5 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
Maltitudes and Cyclic Quadrilaterals
Many results in quadrilateral geometry are traditionally stated for convex quadrilaterals. In this paper, we show that several of these results remain valid for self-intersecting quadrilaterals.
Mohammad Hassan Murad
core +1 more source