Results 41 to 50 of about 636 (237)

The Ghinelli–Löwe construction of generalized quadrangles

European Journal of Combinatorics, 2003
The authors dig up an old construction of some finite generalized quadrangles due to Ghinelli and Löwe, which was never published. No new examples arise, but the authors identify earlier examples of this method (and these examples were not identified before) as flock quadrangles of Cantor-Knuth type.
GHINELLI, Dina, PAYNE S. E.
openaire   +1 more source

A Soft, Flexible Implant for Wireless Photothermal–Pyroelectric Neurostimulation

Advanced Science, EarlyView.
A replication strategy is used to enlarge the exposed surface area of barium titanate within flexible films with embedded carbon nanotubes, enabling efficient photothermal‐pyroelectric stimulation. Polar crystalline nanosheets show superior performance in guiding neural progenitor cells toward neuronal differentiation.
Jiang Wu, Minmin Mao, Beltzane Garcia Cirera, Hao Ye, Xiangzhong Chen, Josep Puigmartí‐Luis, Ni Qin, Salvador Pané   +7 more
wiley   +1 more source

Crystal Facet‐Polysaccharide Matching in CFS‐P Nanocrystals Drives Fungal Uptake, Vacuole Destruction, and Selective Antifungal Activity

Advanced Science, EarlyView.
Facet‐engineered PVP‐capped CuFeSe2 nanocrystals exhibit potent, selective antifungal activity by strongly binding cell‐wall mannan, enabling vacuolar entry and organelle disruption. High‐index facets show superior mannan affinity, validated by theoretical calculations and experiments. CFS‐P induces vacuolar cavitation, mitochondrial abnormalities, and
Zhaohui Wang, Xiaojin Deng, Xujuan Huang, Yuhang Pan, Yao Qin, Lu Zhang, Le Xu, Tianyi Qin, Deteng Zhang, Yi Ma, Yalong Wang   +10 more
wiley   +1 more source

A New Family of Extended Generalized Quadrangles

European Journal of Combinatorics, 1997
In this paper, the authors construct in an entirely geometric way an infinite family of rank 3 geometries extending the generalized quadrangles \(T^*_2 (O)\), \(O\) a hyperoval in the projective plane \(PG (2,q)\) for some prime power \(q\). The construction uses two hyperovals in \(PG (4,q)\): one in a plane \(\pi\), and another one (as set of planes)
DEL FRA A., PASECHNIK D., PASINI, ANTONIO   +2 more
openaire   +6 more sources

Shadow‐Calibrated Stereo Vision for Colorimetric Sweat Analysis

Advanced Science, EarlyView.
By establishing a mathematical model that reconstructs 3D structures through geometric features of object shadows under controlled illumination, and combining it with Convolutional Neural Network‐based 2D image analysis for volumetric calibration, this work enables highly accurate 3D morphological reconstruction.
Ting Xiao, Yuwen Yan, Miaorong Lin, Jiahui Chen, Jianxin Meng, Xiang Cui, Peng Zhang, Fengyu Li   +7 more
wiley   +1 more source

Asymmetric Electrostrain/Electrobending in Piezoelectric Ceramics: Role of Defect Dipoles or Oxygen Vacancies

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, Geng Huangfu, Hongjie Zhang, Tiannan Yang, Zhenhua Ma, Jingsheng Chen, Yun Liu, Yiping Guo   +7 more
wiley   +1 more source

Lattice Distortion‐Driven Metal Exsolution in Perovskite Oxides

Advanced Science, EarlyView.
This study elucidates the mechanism of lattice distortion‐driven exsolution through a combination of computational simulations and experimental approaches. Lattice distortion facilitates the formation of oxygen vacancies and subsequent metal segregation, thereby enhancing the exsolution behavior.
Yo Han Kim, Uchan Jeon, Hyeongwon Jeong, Bo‐Ram Won, Jeong Woo Han, Jae‐ha Myung   +5 more
wiley   +1 more source

The Veldkamp Space of Two-Qubits

Symmetry, Integrability and Geometry: Methods and Applications, 2007
Given a remarkable representation of the generalized Pauli operators of two-qubits in terms of the points of the generalized quadrangle of order two, W(2), it is shown that specific subsets of these operators can also be associated with the points and ...
Metod Saniga, Michel Planat, Petr Pracna, Hans Havlicek   +3 more
doaj  

Generalized Quadrangles and the Higman-Sims Technique

European Journal of Combinatorics, 1981
Let S be a generalized quadrangle of order (s, t). Let O = {x1, ..., xq} be a set of points of S, q ≥ 2, and put b1 equal to the number of points (≠x1) of O that are collinear with xi,b¯=∑bi/q. Suppose Δ = Δ1+ ⋯ + Δf is a partition of some set Δ of tangent lines to O satisfying the following: f ≥ 2; for 1, i ≤ i ≤ f, each point of O is on θ lines in Δi;
Joseph A. Thas, Stanley E. Payne
openaire   +2 more sources

Rare‐Earth Mediated Engineering in ZnSe@ZnS:Eu3+ to Simultaneously Achieve Structural Modulation and Atomic Eu Doping Sites for X‐Ray Imaging

Advanced Science, EarlyView.
A dual hard‐base anchoring strategy was developed to synthesize ZnSe@ZnS:Eu3+ quantum dots, leveraging fluoride‐oleylamine interactions to create surface atomic Eu doping sites. By precisely tuning temperature, Eu3+ concentration, and fluoride levels, we obtain morphologies ranging from tip growth to coupled flower‐like structures.
Jicun Ma, Chenhao Yang, Jiada Fan, Haorong Jiao, Jiawang Liu, Jialiang Xu, Hui Cai, Yinghui Wang, Boyuan Shen, Jiabin Cui   +9 more
wiley   +1 more source