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Welcome to the Pubget Medical Subject Headings (MESH) browser. Click on a topic or subtopic below to explore related papers. In the gold box is the most recent paper about the current MESH term, and below are 20 related papers.
Fractals (0):
Recent article
Fractals
Abstract
Electroencephalogram (EEG) recordings, and especially the Mu-rhythm over the sensorimotor cortex that relates to the activation of the mirror neuron system (MNS), were acquired from two subject groups (orchestral musicians and nonmusicians), in order to explore action representation processes involve...
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PMID: 20388591
PDF is available here.
PDF is available here.
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Abstract
Artists create their work in conditions of disequilibrium, states of creative chaos that may appear turbulent but are capable of bringing forth new order. By absorbing information from the environment and discharging it negentropically as new work, artists can be modeled as dissipative systems. A cha...
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PMID: 21382261
PDF is available here.
PDF is available here.
Abstract
We quantify the complexity embedded within the paintings of the Jackson Pollock and the musical works of Johann Sebastian Bach. We discuss the challenges inherent in comparisons of the spatial patterns created by Pollock and the sonic patterns created by Bach, including the differing roles that time...
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PMID: 21382264
PDF is available here.
PDF is available here.
Abstract
We study self-avoiding random walks in an environment where sites are excluded randomly, in two and three dimensions. For a single polymer chain, we study the statistics of the time averaged monomer density and show that these are well described by multifractal statistics. This is true even far from...
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PMID: 21517516
PDF is available here.
PDF is available here.
Abstract
We illustrate how this result can be successfully applied in several kernel discriminant analysis algorithms. Experimental results, using a large number of databases and classifiers, demonstrate the utility of the proposed approach. The paper also shows (theoretically and experimentally) that a kern...
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PMID: 20820072
PDF is available here.
PDF is available here.
Abstract
We present a large database of over 50,000 user-labeled videos collected from YouTube. We develop a compact representation called "tiny videos" that achieves high video compression rates while retaining the overall visual appearance of the video as it varies over time. We show that frame sampling us...
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PMID: 21252400
PDF is available here.
PDF is available here.
Abstract
We systematically investigate efficacy of using several different image features such as intensity, fractal texture, and level-set shape in segmentation of posterior-fossa (PF) tumor for pediatric patients. We explore effectiveness of using four different feature selection and three different segmen...
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PMID: 21216716
PDF is available here.
PDF is available here.
Abstract
We developed a standardized approach for quantitative analysis of scar collagen morphology by confocal microscopy using fractal dimension and lacunarity analysis. Full-thickness wounds were created on adult mice, closed by primary intention, and harvested at 14 days after wounding for morphometrics...
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PMID: 21281794
PDF is available here.
PDF is available here.
Ultrasonic Imaging (33)1 2011
Abstract
We derive quantitative acoustic features from spectral-parameter maps of the lesion and adjacent areas. We quantify morphometric features by geometric and fractal analysis of traced lesion boundaries. Initial results on biopsy-proven cases show that although a single parameter cannot reliably discri...
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PMID: 21608446
PDF is available here.
PDF is available here.
Abstract
We also propose an extension of the existing algorithm for the generation of probabilistic fractals, in order to obtain color fractal images. Then we show the results of our experiments and conclude this paper....
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PMID: 20643608
PDF is available here.
PDF is available here.
Medical Physics (37)11 2010
Abstract
This work presents an improved algorithm for the generation of 3D breast software phantoms and its evaluation for mammography.
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PMID: 21158272
PDF is available here.
PDF is available here.
Abstract
We postulate here that microstate sequences should reveal scale-free, self-similar dynamics to explain this remarkable effect and thus that microstate time series show dependencies over long time ranges. To that aim, we deploy wavelet-based fractal analysis that allows determining scale-free behavio...
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PMID: 20921381
PDF is available here.
PDF is available here.
Medical Physics (37)9 2010
Abstract
The feasibility of trabecular bone D3D calculations at 3 T and the relationship of both D2D and D3D parameters with osteoporosis were demonstrated, with a better differentiation for the 3D method. Furthermore, the D3D parameter has probably a different nature of information regarding the trabecular...
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PMID: 20964212
PDF is available here.
PDF is available here.
Abstract
We provide quantitative support for such a theory of interaction-dominant dynamics in human cognition by using wavelet-based multifractal analysis and accompanying multiplicative cascading process on the response series of 4 different cognitive tasks: simple response, word naming, choice decision, a...
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PMID: 20677894
PDF is available here.
PDF is available here.
Water Research (44)13 2010
Abstract
The formation, breakage and re-growth of flocs were investigated using alum and polyDADMAC to explore the reversibility of floc breakage. There is a significant reversibility of the breakage process, i.e. the broken flocs can re-grow to the size before breakage, when charge neutralization dominates...
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PMID: 20494394
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
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PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
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PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
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PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Annals of Neurology (68)1 2010
Abstract
This study aimed to determine whether retinal fractal dimension, a quantitative measure of microvascular branching complexity and density, is associated with lacunar stroke. A total of 392 patients presenting with acute ischemic stroke had retinal fractal dimension measured from digi...
|
PMID: 20582985
PDF is available here.
PDF is available here.
Studying the time scale dependence of environmental variables predictability using fractal analysis.
Abstract
We analyzed a few years records of half-hourly air pollution and meteorological time series from which the trivial seasonal and daily cycles were removed. We encountered a general trend of decreasing Hurst values from about 1.4 (good autocorrelation and predictability), in the sub-daily time scale t...
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PMID: 20465249
PDF is available here.
PDF is available here.
NeuroImage (51)1 2010
Abstract
We sought to derive whole face representations directly from neural activity in the human brain using electroencephalography (EEG). We presented ambiguous fractal noise stimuli to human participants and asked them to rate each stimulus along a "face not present" to "face present" continuum while sim...
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PMID: 20156567
PDF is available here.
PDF is available here.
Abstract
We irradiated polycarbonate with 5 x 10(7) (80)Br(7+) ions/cm(2) of 30 MeV total energy (having a range of about 20 microm in polycarbonate) at a tilt angle of 30 degrees with respect to the sample surface and etched the latent ion tracks selectively. The textured surface is made hydrophobic by carb...
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PMID: 20085343
PDF is available here.
PDF is available here.
Abstract
Phase behavior of CO(2) confined in porous fractal silica with volume fraction of SiO(2) phi(s) = 0.15 was investigated using small-angle neutron scattering (SANS) and ultrasmall-angle neutron scattering (USANS) techniques. The range of fluid densities (0 < (rho(CO(2)))(bulk) < 0.977 g/cm(3)) and te...
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PMID: 20043698
PDF is available here.
PDF is available here.
Physical Review E (81)5 Pt 1 2010
Abstract
We perform simulations of model proteins to study folding on rugged energy landscapes. We construct "first-passage" networks as the system transitions from unfolded to native states. The nodes and bonds in these networks correspond to basins and transitions between them in the energy landscape. We f...
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PMID: 20866261
PDF is available here.
PDF is available here.
Abstract
We attempted to incorporate colloidal theory to Monte Carlo simulations for two model systems of CuO- and SiO(2)-water systems, so as to resolve this difficulty. Conducting three-dimensional off-lattice MC simulations at various pHs for both systems, we investigated effects of pH on fractal structur...
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PMID: 20132942
PDF is available here.
PDF is available here.
Abstract
We demonstrated that by analyzing the signal attenuation in this manner we were able to differentiate two media sub-layers with different orientations of the smooth muscle cells. The other classification method used in our study was fractal analysis. Fractal analysis was implemented in a box-countin...
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PMID: 20360632
PDF is available here.
PDF is available here.
Abstract
Recent empirical studies from cognitive, social and biological psychology revealed the fractal properties of many psychological phenomena. Employing methodologies from time- and frequency-domain analyses enabled detecting persistent long-range dependencies in various psychological and behavioral tim...
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PMID: 20346258
PDF is available here.
PDF is available here.
Abstract
We develop an anatomically consistent representation of the respiratory system. This model is capable of simulating the mechanical properties of the lungs and we compare the model output with in vivo measurements of the respiratory input impedance collected in 20 healthy subjects. This paper provide...
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PMID: 19709953
PDF is available here.
PDF is available here.
Abstract
Angiographic underestimation of LMCA stenosis can be corrected by applying the FGL to obtain a theoretic LMCA diameter, thereby unmasking any diffuse atherosclerotic LMCA disease, or to quantify focal stenosis more precisely where the adjacent segments are also pathological....
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PMID: 20142223
PDF is available here.
PDF is available here.
Abstract
We follow historic intuition that all physical information processing systems will share key organizational properties, such as modularity, that generally confer adaptivity of function. It has long been observed that modular VLSI circuits demonstrate an isometric scaling relationship between the num...
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PMID: 20421990
PDF is available here.
PDF is available here.
Abstract
The features of rat cerebral and cerebellar electrocortical activity (ECoG) under different types of anaesthesia (nembutal, ketamine or zoletil) were examined by the distribution of spectral entropy across frequency bands of ECoG and by calculation of fractal dimension determined on the basis of Hig...
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PMID: 20407488
PDF is available here.
PDF is available here.
Abstract
The classic anatomo-clinic paradigm based on clinical syndromes is fraught with problems. Nevertheless, for multiple reasons, clinicians are reluctant to embrace a more pathophysiological approach, even though this is the prevalent paradigm under "which basic sciences work. In recent decades, nonlin...
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PMID: 21037411
PDF is available here.
PDF is available here.
Abstract
We induced sores in guinea pigs and monitored predefined regions on days 3, 7, 14, and 21 after sore generation. We extracted relevant parameters regarding the tissue echographic structure and attenuation properties. We examined tissue healing by defining a healing function that used the extracted p...
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PMID: 20593323
PDF is available here.
PDF is available here.
Abstract
We investigated the frequency-size distribution of pH series in Poyang Lake Inlet and Outlet. Our findings suggest that water pH is an example of a self-organised criticality (SOC) process. The results show that it is different SOC behaviours that result in the differences of power-law relations bet...
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PMID: 20389010
PDF is available here.
PDF is available here.
Abstract
This paper contends that educators need to prepare young learners to function with the predictable unpredictability of life in this century by participating in the kind of education that is transformational and adaptive to the ways in which children acquire meaning. When teachers implement a dynamic...
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PMID: 20021777
PDF is available here.
PDF is available here.
Abstract
I argue that there are 'no objects only events', that is, dynamic continual process is the basic building block of all existence. My accompanying artworks illustrate these principles using the beauty of computer generated fractals combined with digitally manipulated, figurative images....
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PMID: 20021780
PDF is available here.
PDF is available here.
Abstract
Identifying finger and wrist flexion based actions using a single channel surface electromyogram (sEMG) can lead to a number of applications such as sEMG based controllers for near elbow amputees, human computer interface (HCI) devices for elderly and for defence personnel. These are currently infea...
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PMID: 20964863
PDF is available here.
PDF is available here.
Abstract
long-range volatility correlations and non-Gaussian statistics of intensity fluctuations. We provide evidence that the intensity increments Deltax(tau)=I(t+tau)-I(t), upon different delay time scales tau, can be described as a Markovian process evolving in tau. Thus, the tau dependence of the probab...
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PMID: 20365137
PDF is available here.
PDF is available here.
Abstract
We present an exact and Monte Carlo renormalization group (MCRG) study of semiflexible polymer chains on an infinite family of the plane-filling (PF) fractals. The fractals are compact, that is, their fractal dimension df is equal to 2 for all members of the fractal family enumerated by the odd inte...
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PMID: 20365142
PDF is available here.
PDF is available here.
Abstract
We have performed the C-D analysis in which ten radiologists participated, and compared the fractal-feature distances with the image quality figures (IQF). To clarify the physical meaning of the pseudo fractal dimension and complexity, contrast-to-noise ratio (CNR) and standard deviation (SD) of ima...
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PMID: 20169837
PDF is available here.
PDF is available here.
Optics Express (17)24 2009
Abstract
We present a new kind of vortex lenses in which the radial phase distribution is characterized by the "devil's staircase" function. The focusing properties of these fractal DOEs coined Devil's vortex-lenses are analytically studied and the influence of the topological charge is investigated. It is s...
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PMID: 19997433
PDF is available here.
PDF is available here.