Results 21 to 30 of about 111,774 (266)

Design of Fractal- Based Bandstop Filter for Microwave Radiation Leakage Reduction [PDF]

open access: yesEngineering and Technology Journal, 2017
There is a continuing concern over the risks associated with the use of microwave ovens because of the probable effects of the radiation leakage on the health of the individuals.
H Ahmed, J Ali, Ali Salim
doaj   +1 more source

Adsorption on Fractal Surfaces: A Non Linear Modeling Approach of a Fractional Behavior

open access: yesFractal and Fractional, 2021
This article deals with the random sequential adsorption (RSA) of 2D disks of the same size on fractal surfaces with a Hausdorff dimension ...
Vincent Tartaglione   +2 more
doaj   +1 more source

Iterated Functions Systems Composed of Generalized θ-Contractions

open access: yesFractal and Fractional, 2021
The theory of iterated function systems (IFSs) has been an active area of research on fractals and various types of self-similarity in nature. The basic theoretical work on IFSs has been proposed by Hutchinson.
Pasupathi Rajan   +2 more
doaj   +1 more source

Modern Paradigm Regarding Capital Markets: Fractal Market Hypothesis. Determination of the Hurst Exponent on the Romanian Capital Market

open access: yesEIRP Proceedings, 2022
Classical statistical and econometric theory, intended to provide functional forecasting models in capital markets, is the mathematical foundation for a number of theories - efficient market theory, Harry Markowitz's optimized portfolio theory, the ...
Ana-Maria Metescu
doaj  

Deciphering Exhaled Aerosol Fingerprints for Early Diagnosis and Personalized Therapeutics of Obstructive Respiratory Diseases in Small Airways

open access: yesJournal of Nanotheranostics, 2021
Respiratory diseases often show no apparent symptoms at their early stages and are usually diagnosed when permanent damages have been made to the lungs.
Xiuhua April Si, Jinxiang Xi
doaj   +1 more source

The 100th anniversary of fractal geometry: From Julia and Fatou through Hausdorff and Besicovitch to Mandelbrot [PDF]

open access: yesИзвестия высших учебных заведений: Прикладная нелинейная динамика, 2020
The purpose of this article is to present the biographies of the main creators of fractal geometry from the moment the first ideas arose, when the term «fractal» did not exist, to the present day.
Vdovina, Galina Mihajlovna   +1 more
doaj   +1 more source

Tunable Broadband Terahertz Waveband Absorbers Based on Fractal Technology of Graphene Metamaterial

open access: yesNanomaterials, 2021
In this paper, a metasurface Terahertz absorber based on the fractal technology of a graphene geometry resonator to realize ultra-wideband, ultrathin, adjustable double-layer cross-fractal formation is introduced.
Tong Xie   +5 more
doaj   +1 more source

The Generalized Iterated Function System and Common Attractors of Generalized Hutchinson Operators in Dislocated Metric Spaces

open access: yesFractal and Fractional, 2023
In this paper, we present the generalized iterated function system for the construction of common fractals of generalized contractive mappings in the setup of dislocated metric spaces.
Talat Nazir, Sergei Silvestrov
doaj   +1 more source

A Comprehensive Review of Additive Manufacturing for Space Applications: Materials, Advances, Challenges, and Future Directions

open access: yesAdvanced Engineering Materials, EarlyView.
Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos   +8 more
wiley   +1 more source

Bioinspired Materials, Designs, and Manufacturing Strategies for Advanced Impact‐Resistant Helmets

open access: yesAdvanced Engineering Materials, EarlyView.
This review explores how bioinspired materials, structures, and manufacturing strategies transform helmet design to achieve enhanced impact resistance. Drawing inspiration from nacre, porcupine quills, beetle exoskeletons, and skull architectures, it highlights advances in auxetic lattices, nanocomposites, and functionally graded foams.
Joseph Schlager   +4 more
wiley   +1 more source

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