Results 41 to 50 of about 8,935 (238)

An approach to study of methods for urban analysis and urban fabric renewal in observation of a city as a multiple fractal structure [PDF]

Arhitektura i Urbanizam, 2007
Urban forms and processes can be observed as fractal structures since in their seemingly chaotic development and complexity it can be noticed an internal order and regularity, which could be quantified and described by the methods of fractal analysis ...
Bogdanov Ana, Manić Božidar, Petrić Jasna   +2 more
doaj  

Water Permeates and Plasticizes Amorphous Carbon Dots: Unraveling the Inner Accessibility of the Nanoparticles by Glass Transition Studies

Advanced Materials, EarlyView.
The water permeability of amorphous carbon dots (CDs) is demonstrated by investigating their plasticization. Novel polyamide‐based and amorphous nanoparticles are synthesized by controlling their inner packing density. Water plasticization is evidenced by the decrease of the CDs glass transition temperature with increasing the hydration degree.
Elisa Sturabotti, Valerio Di Lisio, Lucia Cardo, Alessandro Camilli, Estela Moretón Alfonsín, Daniele Cangialosi, Amaia Iturrospe Ibarra, Arantxa Arbe, Maurizio Prato   +8 more
wiley   +1 more source

A Novel Fractal Multi-band Frequency Selective Surface

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
In this paper, a new multiband fractal frequency selective surface (MF-FSS) is proposed. The work presents a new fractal design methodology for FSSs with Swastika fractal patch elements.
Mahmoud Fallah, Amir Hossein Nazeri, Mohammad Reza Azadkhah   +2 more
doaj   +1 more source

Leaftronics: Bio‐Fractal Scaffolds From Leaf Venation for Low‐Waste Electronics

Advanced Materials, EarlyView.
“Leaftronics” transforms naturally evolved leaf venation into quasi‐fractal scaffolds for sustainable electronics. Polymer‐infiltrated leaf skeletons can be used to fabricate ultra‐smooth, reflow‐ and thin‐film‐compatible decomposable substrates, while making the same lignocellulose networks conducting results in flexible transparent electrodes.
Rakesh Rajendran Nair, Hrisheekesh Thachoth Chandran, Karl Leo, Hans Kleemann   +3 more
wiley   +1 more source

Influence of the Fractal Geometry on the Mechanical Resistance of Cantilever Beams Designed through Topology Optimization

Applied Sciences, 2021
In this work, the complex geometry of beams obtained from topology optimization is characterized through the fractal dimension (FD). The fractal dimension is employed as an efficiency measure of the mass distribution in the beams, that is, the capacity ...
Pablo Pavón-Domínguez, Guillermo Portillo-García, Alejandro Rincón-Casado, Lucía Rodríguez-Parada   +3 more
doaj   +1 more source

Resolving Heterogeneity of Targeted Lipid Nanoparticles Through Solution‐Based Biophysical Analyses

Advanced Materials, EarlyView.
AF4‐UV‐DLS‐MALS‐SAXS resolves previously inaccessible targeted lipid nanoparticle (tLNP) subpopulations that differ in size, shape, and composition. Correlation of subpopulation‐resolved biophysical properties with in vivo RNA delivery reveals that targeted placental transfection is associated with distinct tLNP subpopulations rather than ensemble ...
Hannah C. Geisler, Hannah C. Safford, Ajay S. Thatte, Marshall S. Padilla, Elisa Battistini, Hannah M. Yamagata, Violet M. Ullman, Alex Chan, Benjamin E. Nachod, Anushka Agrawal, Maxwell B. Watkins, Jesse B. Hopkins, Andrew Tsourkas, Kushol Gupta, Michael J. Mitchell   +14 more
wiley   +1 more source

Fractal Geometry

AbstractFlow–Geometry Theory reformulates geometry as a dynamic consequence of the flow state of a medium, described by the parameter S. Distances, curvature, dimensionality and topology become S-dependent, making geometry a variable rather than a fixed background.
Shlomo Libeskind, Isa S. Jubran
  +4 more sources

An Interface Design for Calculation of Fractal Dimension

Chaos Theory and Applications, 2020
Partially insufficient is the modelling of irregular and complex forms using Euclidean geometry. On the other hand, fractal geometry allows irregular complex forms and structures to be expressed in mathematical terms. While fractal geometry appears to be
Mustafa Zahid Yıldız, Ömer Faruk Boyraz, İhsan Pehlivan, Ali Fuat Boz, Zeynep Garip, Murat Erhan Çimen   +5 more
doaj  

Design of Microstrip Antenna Using Fractal Geometry and Metamaterial

Diyala Journal of Engineering Sciences, 2015
The performance improvement which was achieved in rectangular patch antenna was made by the use of fractal geometry and Left-Handed Metamaterial (LHM). The two types of fractal geometry used are 1st iteration of Minkoweski and Koch separately, while the
Waleed K. Abd, Muneer A. Hashem, Israa H. Ali   +2 more
doaj   +1 more source

A Wideband Hybrid Fractal Ring Antenna for WLAN Applications

International Journal of Antennas and Propagation, 2022
We propose the design of a novel fractal antenna that is both unique and performance-driven. Two important antenna design features, miniaturization and wideband operation, are combined in this work.
Atif Jamil, Muhammad Rauf, Abdul Sami, Arsalan Ansari, Muhammad Dawood Idrees   +4 more
doaj   +1 more source