Results 101 to 110 of about 1,618,388 (368)

Topological and geometric decomposition of nematic textures [PDF]

Physical Review E, 2012
16 pages, 5 ...
Slobodan Žumer, Slobodan Žumer, Simon Čopar   +2 more
openaire   +4 more sources

Enhancing Optoelectronic Properties in Phthalocyanine‐Based SURMOFs: Synthesis of ABAB Linkers by Avoiding Statistical Condensation with Tailored Building Blocks

Advanced Functional Materials, EarlyView.
A novel phthalocyanine (PC)‐based metal–organic framework (MOFs) is synthesized using ditopic PC linkers obtained through regioselective statistical condensation. The resulting MOF exhibits significant improvements in electronic absorption, thereby enhancing the material's performance in light harvesting and energy conversion.
Lukas S. Langer, Mareen Stahlberger, Xiaojing Liu, Yi Luo, Niklas E. Häußermann, Puja Singhvi, Yidong Liu, Olaf Fuhr, Martin Nieger, Lars Heinke, Thomas Heine, Christof Wöll, Stefan Bräse   +12 more
wiley   +1 more source

Geometric Attributes of Polygonal Crack Patterns in Columnar Joints

Earth and Space Science, 2021
A well‐ordered polygonal crack pattern is frequently observed on the outcrop surface of columnar joints. The crack pattern's geometry and topology result from the volume contraction of solidified lava during thermal dissipation.
Y. Akiba, A. Takashima, A. Inoue, H. Ishidaira, H. Shima   +4 more
doaj   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

Geometric topology of CR-warped products in six-dimensional sphere

AIMS Mathematics
In this paper, we prove that a three-dimensional CR-warped product submanifold of a nearly Kaehler six-dimensional sphere, under some restrictions, contains finite fundamental groups.
Noura Alhouiti, Fatemah Mofarreh, Fatemah Abdullah Alghamdi, Akram Ali , Piscoran-Ioan Laurian   +4 more
doaj   +1 more source

Intersections of automorphism fixed subgroups in the free group of rank three

, 2004
We show that in the free group of rank 3, given an arbitrary number of automorphisms, the intersection of their fixed subgroups is equal to the fixed subgroup of some other single automorphism.Comment: Published by Algebraic and Geometric Topology at ...
Armando Martino, Bestvina, Collins, Dicks, Imrich, Lyndon, Stallings, Whitehead   +7 more
core   +3 more sources

Intramolecular Down‐ and Up‐Conversion in Dimeric Tetracene Complexes Centered via Platinum(II) and Palladium(II)

Advanced Functional Materials, EarlyView.
Metal‐tetracene dimeric complexes are synthesized through the pyridyl coordination to either Pt(II) or Pd(II). Photophysical properties are systematically compared as a function of the metal using steady‐state and time‐resolved spectroscopy. The Pt(II) dimer exhibits efficient intramolecular singlet fission and subsequent intramolecular up‐conversion ...
Yifan Bo, Yuxuan Hou, Melchor Matabuena, Rik R. Tykwinski, Dirk M. Guldi   +4 more
wiley   +1 more source

Bandgap design of 3D single-phase phononic crystals by geometric-constrained topology optimization

AIMS Materials Science
Phononic crystals (PnCs) possessing desired bandgaps find many potential applications for elastic wave manipulation. Considering the propagating essence of three-dimensional (3D) elastic waves and the interface influence of multiphase material, the ...
Cheng Xiong, Yi Xiao, Qing-Hua Qin, Hui Wang , Zhuo-Ran Zeng   +4 more
doaj   +1 more source

The Breakdown of Topology at Small Scales

, 2003
We discuss how a topology (the Zariski topology) on a space can appear to break down at small distances due to D-brane decay. The mechanism proposed coincides perfectly with the phase picture of Calabi-Yau moduli spaces.
C.I. Lazaroiu, D.-E. Diaconescu, D.R. Morrison, E. Scheidegger, I. Brunner, I.M. Gelfand, J.-P. Serre, L. Borisov, M. Kontsevich, M. Kontsevich, M.R. Douglas, M.R. Douglas, M.R. Douglas, M.R. Douglas, P.S. Aspinwall, P.S. Aspinwall, P.S. Aspinwall, P.S. Aspinwall, Paul S Aspinwall, R.P. Horja, S. Katz, T. Bridgeland, V.V. Batyrev   +22 more
core   +1 more source

Geometrical and topological approaches to Big Data

Future Generation Computer Systems, 2017
Modern data science uses topological methods to find the structural features of data sets before further supervised or unsupervised analysis. Geometry and topology are very natural tools for analysing massive amounts of data since geometry can be regarded as the study of distance functions.
Snášel, Václav, Nowaková, Jana, Xhafa, Fatos, Barolli, Leonard   +3 more
openaire   +5 more sources