Results 91 to 100 of about 5,604,790 (214)

Fractal Analysis of Periodontal Tissues in Geriatric Patients With Different Periodontal Conditions: A Retrospective Study

open access: yesOral Diseases, EarlyView.
ABSTRACT Objective This study evaluated the relationship between fractal dimension (FD) values and periodontal status in geriatric patients using digital panoramic radiographs. Methodology In this retrospective observational study, 147 elderly individuals were classified as periodontally healthy (n = 30), gingivitis (n = 32), Stage I periodontitis (n = 
Dilek Ozkan Sen   +5 more
wiley   +1 more source

Spatial variation in morphological traits of natural Haloxylon ammodendron populations on the eastern margin of the Badain Jaran Desert

open access: yesPlant Biology, EarlyView.
Natural Haloxylon ammodendron populations on the eastern margin of the Badain Jaran Desert showed size‐associated differences in plant height, crown diameter, and spatial patterns among stem‐base diameter classes. These patterns describe morphological spatial variation but do not establish specific environmental drivers.
S. Hongfei, W. Chengjie, L. Shijie
wiley   +1 more source

Is the World Getting Smaller? Network‐Driven Heterogeneity in Gravity‐Model Elasticities

open access: yesThe World Economy, EarlyView.
ABSTRACT Gravity models constitute the workhorse of empirical international trade research, yet the temporal stability of their core parameters—distance and GDP elasticities—remains underexplored, particularly in relation to the evolving structure of trade networks.
Zsolt T. Kosztyán   +2 more
wiley   +1 more source

A new fractal-interpolation algorithm for seismic data based on iterated function systems

open access: yes, 2010
A new fractal-interpolation method called PPA (Pointed Point Algorithm) based on the Iterated Function System (IFS) is proposed to interpolate the signals with the expected interpolation error, solving the problem that the ordinary fractal interpolation ...
Heidi Kuzma   +2 more
core   +1 more source

Explicit relation between Fourier transform and fractal dimension of fractal interpolation functions

open access: yes, 2023
This paper provides an explicit representation for the Fourier transform of different kinds of fractal interpolation functions. The construction of fractal functions using the theme of iterated function system has merely provided the functional equation.
Nur Aisyah Abdul Fataf   +2 more
core   +1 more source

Divergence-Free Multiwavelets on the Half Plane

open access: yesAxioms, 2013
We use the biorthogonal multiwavelets related by differentiation constructed in previous work to construct compactly supported biorthogonal multiwavelet bases for the space of vector fields on the upper half plane R2 + such that the reconstruction ...
Phan Nguyen, Joseph Lakey
doaj   +1 more source

An Explainable Self‐Supervised Temporal Transformer for Participant‐Level Classification of Depressive Symptoms From Resting‐State EEG

open access: yesInternational Journal of Methods in Psychiatric Research, Volume 35, Issue 4, December 2026.
ABSTRACT Background Resting‐state electroencephalography (EEG) has emerged as a promising non‐invasive modality for investigating depressive symptoms; however, conventional deep‐learning methods often require large labeled datasets and provide limited interpretability.
Pushpamala Ramaiah   +10 more
wiley   +1 more source

Variation and Minkowski dimension of fractal interpolation surface

open access: yes, 2008
The fractal interpolation surface on the rectangular domain is discussed in this paper. We study the properties of the oscillation and the variation of bivariate continuous functions.
Feng, Zhigang
core   +1 more source

Training Deep Learning Based Dynamic MR Image Reconstruction Using Synthetic Fractals

open access: yesMagnetic Resonance in Medicine, Volume 96, Issue 6, Page 2795-2802, December 2026.
ABSTRACT Purpose To investigate whether synthetically generated fractal data can be used to train deep learning (DL) models for dynamic MRI reconstruction, thereby avoiding the privacy, licensing, and availability limitations associated with cardiac MR training datasets.
Anirudh Raman   +10 more
wiley   +1 more source

Smooth fractal interpolation

open access: yesJournal of Inequalities and Applications, 2006
Fractal methodology provides a general frame for the understanding of real-world phenomena. In particular, the classical methods of real-data interpolation can be generalized by means of fractal techniques. In this paper, we describe a procedure for the
Sebastián MV, Navascués MA
doaj  

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