Results 81 to 90 of about 4,520,879 (281)

A novel approach to the photochemical UV-C activation of PAA-coated Fe₃O₄ nanoparticles for oriented APTES functionalisation with free surface-amino groups

Applied Surface Science Advances
Fe₃O₄ MNPs with polyhedral (P1) and cubic (K1) morphologies, prepared by a thermal decomposition method, were coated with polyacrylic acid (PAA) and surface functionalised with the organic ligand 3-(aminopropyl)triethoxysilane (APTES). A novel method was
M. Barutiak, A. Zeleňáková, P. Hrubovčák, L. Nagy, D. Volavka, J. Szűcsová, Ž. Fabriciová, A. Antošová   +7 more
doaj   +1 more source

Complexity of the Delaunay Triangulation of Points on Polyhedral Surfaces [PDF]

Discrete and Computational Geometry, 2003
This paper studies the expected complexity of the Delaunay triangulations of points distributed on the boundary of a given polyhedron in 3-space. It is shown that under certain sampling conditions the expected complexity is \(O(n^{1.8})\) for general polyhedral surfaces and \(O(n\sqrt{n})\) for convex polyhedral surfaces.
Dominique Attali, Jean-Daniel Boissonnat
openaire   +1 more source

Front‐Loading Zn2+ via Lattice‐Breathing‐Enabled Early‐Stage Co‐Intercalation for Ultrastable Zn‐Ion Batteries

Advanced Science, EarlyView.
This study introduces In3+ into δ‐MnO2 to create a lattice breathing effect via a dynamic strain field, which establishes efficient ″ polaronic superhighways″ for charge transport. We uncover an unconventional two‐stage (Zn2+/H+ co‐insertion followed by Zn2+‐dominant) mechanism that enables reversible structural adjustment. This approach simultaneously
Haitao Li, Min Bu, Songlin Li, Huili Cao, Qi Lei, Yang Wang, Limin Zhou, Haigang Liu, Shumin Yang, Zhenhua Chen, Ying Zou, Bo Sun, Wen Wen, Yong Wang, Xiangzhi Zhang, Renzhong Tai   +15 more
wiley   +1 more source

STUDY ON THE SOLVING OF SURFACES INTERSECTIONS IN PROJECTIONS WITH ELEVATIONS

Journal of Industrial Design and Engineering Graphics, 2022
This paper presents two examples for the solution of polyhedral surfaces intersection, of elliptical paraboloid respectively, by making use of the representation system of the projections with elevations.
Raluca Nerisanu, Delia Dragan
doaj  

Halide Perovskite: A Rich Source of Thermal Insulator

Advanced Science, EarlyView.
Halide perovskites exhibit ultralow thermal conductivity driven by intrinsic lattice softness and strong anharmonicity, falling below conventional defect‐engineering limits. Weak metavalent bonding, A‐site rattling, and dynamic octahedral tilting drive phonon scattering to the Ioffe–Regel limit, where wave‐like tunneling replaces particle‐like ...
Haolin Ye, Bangzhi Ge, Yuan Yu, Chongjian Zhou   +3 more
wiley   +1 more source

Surface Embeddability of Graphs via Reductions [PDF]

, 2011
On the basis of reductions, polyhedral forms of Jordan axiom on closed curve in the plane are extended to establish characterizations for the surface embeddability of a ...
Liu, Yanpei
core   +1 more source

Modified MXene Aerogel With Broadband Microwave Absorption Inspired by Melanophila Acuminata Beetle

Advanced Science, EarlyView.
This work introduces a novel biomimetic strategy inspired by the infrared‐sensing sensilla of the Melanophila acuminata beetle. We have designed a multi‐level aerogel, featuring a three‐dimensional carbon framework decorated with synergistic CeO2 nanoparticles and Ti3C2Tx MXene nanosheets.
Zhiwei Liu, Dingyu Xu, Zhaobo Liu, Haitian Song, Qianqian Zhang, Junxiao Zhou, Xiewen Wen   +6 more
wiley   +1 more source

Guarding polyhedral terrains [PDF]

, 1997
We prove that ⌊n2⌋ vertex guards are always sufficient and sometimes necessary to guard the surface of an n-vertex polyhedral terrain. We also show that ⌊(4n − 4)13⌋ edge guards are sometimes necessary to guard the surface of an n-vertex polyhedral ...
Bose, Prosenjit, Toussaint, Godfried, Shermer, Thomas, Zhu, Binhai   +3 more
core   +1 more source

Binary positive semidefinite matrices and associated integer polytopes [PDF]

, 2010
We consider the positive semidefinite (psd) matrices with binary entries, along with the corresponding integer polytopes.We begin by establishing some basic properties of these matrices and polytopes.
Sorensen, M M, Adam N. Letchford, Michael M. Sørensen, Letchford, A N   +3 more
core   +3 more sources

DEM calibration insights on the role of particle shape for sub 2 mm particles

Scientific Reports
This study introduces a comprehensive calibration technique for discrete element method (DEM) simulations. Its focus is on particles smaller than 2 mm and this showcase shows comparison between spherical and polyhedral particle shape calibration.
Jan Diviš, David Žurovec, Álvaro Ramírez-Gómez, Jakub Hlosta, Jiří Rozbroj, Kamila Pokorná, Jan Nečas, Jiří Zegzulka   +7 more
doaj   +1 more source