Results 61 to 70 of about 295,150 (372)

Optical Diffraction from Fractals with a Structural Transition

, 1994
A macroscopic characterization of fractals showing up a structural transition from dense to multibranched growth is made using optical diffraction theory.
Allain, Ben-Jacob, Berger, Born, Canessa, Canessa, Castella, Enrique Canessa, Felipe Pérez-Rodríguez, Fleury, Kaye, Korvin, Louis, Mandelbrot, Niemeyer, Peiponen, Uozumi, Uozumi, Wang, Wang, Wei Wang, Witten   +21 more
core   +1 more source

The Realization of Multidirectional, Free‐Standing 3D Plasmonic Nanostructures via 3D Nanoprinting: A Case Study of Fractal Antennas

Advanced Functional Materials, EarlyView.
Free‐standing plasmonic gold‐based fractal antennas are fabricated by 3D nanoprinting, employing focused electron beam induced deposition and an optimized purification method to remove carbon while conserving structural fidelity. Simulation and experiment show broadband plasmonic activity, including customizable polarizability, thereby paving the way ...
Verena Reisecker, Robert Winkler, Ulrich Hohenester, Evelin Fisslthaler, Daniel Knez, Gerald Kothleitner, Georg Haberfehlner   +6 more
wiley   +1 more source

Fractal heterogeneous media [PDF]

Physical Review E, 2010
A method is proposed for generating compact fractal disordered media, by generalizing the random midpoint displacement algorithm. The obtained structures are invasive stochastic fractals, with the Hurst exponent varying as a continuous parameter, as opposed to lacunar deterministic fractals, such as the Menger sponge. By employing the Detrending Moving
TURK, CHRISTIAN, CARBONE, ANNA FILOMENA, CHIAIA, Bernardino   +2 more
openaire   +4 more sources

Laplace Operators on Fractals and Related Functional Equations

, 2012
We give an overview over the application of functional equations, namely the classical Poincar\'e and renewal equations, to the study of the spectrum of Laplace operators on self-similar fractals.
Akkermans E, Akkermans E Benichou O Dunne G Teplyaev A Voituriez R, Bajorin N, Barlow M T, Barlow M T, Barlow M T, Barlow M T Bass R F, Bellissard J, Bellissard J, Boas R P Jr, de Gennes P G, Derfel G, Derfel G, Dunne G V, Dunne G V, Elizalde E, Elizalde E, Elizalde E, Erëmenko A È, Erëmenko A È, Falconer K J, Falconer K J, Federer H, Feller W, Fritz Vogl, Fukushima M, Fukushima M, Gilkey P B, Gilkey P B, Gregory Derfel, Grigor’yan A, Hamilton D H, Hardy G H, He C Q, Jorgenson J, Kajino N, Kigami J, Kirillov A A, Kirsten K, Kumagai T, Kusuoka S, Lapidus M L, Lapidus M L, Lapidus M L van Frankenhuysen M, Levin G M, Lindstrøm T, Mandelbrot B B, Metz V, Milnor J, Molčanov S A, Molčanov S A, Naimark K, Naimark K, Peter J Grabner, Poincaré H, Poincaré H, Sabot C, Schweitzer G, Seeley R T, Shima T Elworthy K D Ikeda N, Simon B, Steinhurst B Teplyaev A, Strichartz R S, Tenenbaum G, Teplyaev A, Triebel H, Valiron G, Valiron G, Yosida K   +68 more
core   +1 more source

MPI‐Guided Photothermal Therapy of Prostate Cancer Using Stem Cell Delivery of Magnetotheranostic Nanoflowers

Advanced Functional Materials, EarlyView.
Tumor‐tropic human mesenchymal stem cells (hMSCs) were used as delivery vehicles for magnetotheranostic gold–iron oxide nanoflowers. Magnetic particle imaging of the iron component demonstrated widespread intratumoral distribution and sustained retention in contrast to injection of naked nanoflowers.
Behnaz Ghaemi, Ana Rosu, Shreyas Kuddannaya, Gautier Laurent, Rana Bazzi, Stéphane Roux, Ali Shakeri‐Zadeh, Jeff W. M. Bulte   +7 more
wiley   +1 more source

From Fractal Groups to Fractal Sets [PDF]

, 2003
This paper is a survey, with few proofs, of ideas and notions related to self-similarity of groups, semi-groups and their actions. It attempts to relate these concepts to more familiar ones, such as fractals, self-similar sets, and renormalizable dynamical systems.
Bartholdi, Laurent, Grigorchuk, Rostislav, Nekrashevych, Volodymyr V.   +2 more
openaire   +3 more sources

Quantum Fractal Fluctuations [PDF]

Physical Review Letters, 2001
revtex, 4 pages, 5 ...
BENENTI, GIULIANO, CASATI, GIULIO, GUARNERI, ITALO, TERRANEO M.   +3 more
openaire   +4 more sources

Diffusion on non exactly decimable tree-like fractals

, 1997
We calculate the spectral dimension of a wide class of tree-like fractals by solving the random walk problem through a new analytical technique, based on invariance under generalized cutting-decimation transformations.
Alberto Pirati, Alexander S, Burioni R, Burioni R, Burioni R, Davide Cassi, Giacometti A, Polya G, Raffaella Burioni, Sofia Regina   +9 more
core   +2 more sources

Overcoming the Stability Issue for Hydrophobic Hole Transporting Layers Utilized in Tin‐Lead Perovskite and Tandem Solar Cells

Advanced Functional Materials, EarlyView.
A non‐annealed process is developed for non‐PEDOT:PSS inverted tin‐lead perovskite solar cells to attain PCE 22.67% for the PTAA‐based device. When PTAA is applied in an all‐perovskite tandem solar cell, a record efficiency of 28.14% is obtained with great stability for the efficiency maintaining 96% of its original value for 500 h under one‐sun ...
Chun‐Hsiao Kuan, Xianyuan Jiang, Qilin Zhou, Xin Wen, Sung‐Fu Hung, Hsin‐Lung Chen, Yun‐Sheng Shih, Sudhakar Narra, Mingyu Ma, Jau‐Wern Chiou, Jhih‐Min Lin, Yi Hou, Eric Wei‐Guang Diau   +12 more
wiley   +1 more source

Wavelet q-extropies of fractal signals

Papers in Physics
The standard Tsallis and R´enyi extropies of parameter q are extended to the time-scale domain, and closed-form expressions of these extropies for fractal signals of parameter α are obtained.
Julio César Ramírez Pacheco, Joel Antonio Trejo Sánchez, Luis Rizo Domínguez   +2 more
doaj   +1 more source