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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.
Mathematical Concepts (9):
Recent article
Mathematical Concepts
Abstract
Accurate time measurement is essential to temporal analysis in sport. This study aimed to (a) develop a new method for time computation from surveyed trajectories using a high-end global navigation satellite system (GNSS), (b) validate its precision by comparing GNSS with photocells,...
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PMID: 21957698
PDF is available here.
PDF is available here.
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Perception (40)1 2011
Abstract
Temporal experience can be modulated by several environmental factors. There is increasing evidence that numerical quantity may also influence temporal processes. Here, it is shown that merely looking at numbers causes a bias in a time-bisection task that depends on its magnitude. In...
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PMID: 21513181
PDF is available here.
PDF is available here.
Abstract
We study ecological equations for both tree system and cycle system. We obtain a set of sufficient conditions for the ultimate boundedness to nonautonomous n-dimensional Lotka-Volterra tree systems with continuous time delay. The criteria are applicable to cooperative model, competition model, and p...
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PMID: 21431606
PDF is available here.
PDF is available here.
Abstract
Algebraic analysis of social networks exhibited by SARS-Beijing-2003 and AH1N1 flu-México-2009 was realized. The main tools were the Tutte polynomials and Maple package Graph-Theory. The topological structures like graphs and networks were represented by invariant polynomials. The evolution of a giv...
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PMID: 21431617
PDF is available here.
PDF is available here.
Abstract
We also show how calculation in temporal logic for model checking can be done by means of our direct and efficient Groebner basis computation in Boolean rings. We present our experimental results in finding attractors and control strategies of Boolean networks to illustrate our theoretical arguments...
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PMID: 21431552
PDF is available here.
PDF is available here.
Abstract
We need to develop an arsenal of techniques that are of broader applicability. The notion of patterning created in some fashion by biological processes and properties may provide such a generalized property of biological systems no matter what the incidentals of chemistry or environmental conditions...
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PMID: 21431556
PDF is available here.
PDF is available here.
Abstract
Our results are hard to reconcile with theories that suggest that deficits in the automaticity of numerical processing can be related to differential math achievement levels. Immaturity in the precision of mappings between numbers and their numerical magnitudes might be better suited to explain the...
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PMID: 20437281
PDF is available here.
PDF is available here.
Journal of Nutrition (140)8 2010
Abstract
Various measures have been used to estimate height when assessing nutritional status. Current equations to obtain demi-span equivalent height (DEH(Bassey)) are based on a small sample from a single study. The objectives of this study were to develop more robust DEH equations from a large number of m...
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PMID: 20554901
PDF is available here.
PDF is available here.
Abstract
We show that every example can be factored into A = F(1)...F(N) where N is controlled by the bandwidths of A and A(-1) (but not by their size, so this extends to infinite matrices and leads to new matrix groups)....
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PMID: 20615937
PDF is available here.
PDF is available here.
Diabetic Medicine (27)6 2010
Abstract
Neural Networks (23)5 2010
Abstract
In this article a method of error estimation for the neural approximation of the solution of an Ordinary Differential Equation is presented. Some examples of the application of the method support the theory presented.
Copyright 2010. Published by Elsevier Ltd.
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PMID: 20399605
PDF is available here.
PDF is available here.
Social Science and Medicine (70)12 2010
Abstract
In this investigation, tests were performed to determine whether mortality cycles are asymmetric. Results from an asymmetry test of U.S. time-series data from 1951 to 2005 provide no evidence that all-cause mortality or mortality caused by disease causes asymmetric cycles. However, the rate of fatal...
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PMID: 20378221
PDF is available here.
PDF is available here.
NeuroImage (51)1 2010
Abstract
We show here that strong brain-behaviour links can be revealed without any voxel selection or data reduction, using just plain linear regression as a classifier applied to the whole brain at once, i.e. treating each entire brain volume as a single multi-voxel pattern. The brain-behaviour correlation...
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PMID: 20132896
PDF is available here.
PDF is available here.
Journal of Experimental Biology (213)Pt 8 2010
Abstract
We used an agent-based model to understand the mechanisms underlying group fission in two semi-free-ranging groups of macaques: one group of Tonkean macaques (Macaca tonkeana) and one of rhesus macaques (M. mulatta). The results showed that sub-grouping patterns were mainly influenced by affiliative...
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PMID: 20348346
PDF is available here.
PDF is available here.
Behavior Modification (34)2 2010
Endurance of multiplication fact fluency for students with attention deficit hyperactivity disorder.
Abstract
This study examines the relationship between a critical learning outcome of behavioral fluency and endurance, by comparing the effects of two practice procedures on multiplication facts two through nine. The first procedure, called whole time practice trial, consisted of an uninterru...
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PMID: 20308353
PDF is available here.
PDF is available here.
Abstract
We therefore recorded the activity of individual prefrontal cortex (PFC) neurons in rhesus monkeys required to switch flexibly between "greater than" and "less than" rules. The monkeys performed this task with different numerical quantities and generalized to set sizes that had not been presented pr...
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PMID: 20133872
PDF is available here.
PDF is available here.
Abstract
A simple mathematical model is presented that predicts vowel identification by cochlear implant users based on these listeners' resolving power for the mean locations of first, second, and/or third formant energies along the implanted electrode array. This psychophysically based model provides hypoth...
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PMID: 20136228
PDF is available here.
PDF is available here.
Abstract
A randomized clinical trial is widely regarded as the most rigorous study design to determine the efficacy of intervention because spurious causality and bias associated with other experimental designs can be avoided. The purpose of this article is to provide clinicians and clinical researchers the...
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PMID: 20009954
PDF is available here.
PDF is available here.
Abstract
We first assume that some words in the first language (L1) and the corresponding object representations are initially learned during a preliminary training phase. Subsequently, second-language (L2) words are learned by simultaneously presenting the new word together with the L1 one. A competitive me...
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PMID: 20204173
PDF is available here.
PDF is available here.
Abstract
82 children (mean age: 8.5 years) could be included with a mean bladder volume of 92 mL (0 to 227 mL). The mean error ranged from 20.2 % (cuboid formula) to 38.0 % (prolate ellipsoid). With decreasing bladder volume all formulae showed an increasing error and a tendency for underestimation of the bl...
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PMID: 19842077
PDF is available here.
PDF is available here.
BMC Genetics (11) 2010
Abstract
Following analysis of Plasmodium falciparum dihydrofolate reductase SNPs associated with resistance to a commonly used antimalarial drug, Fansidar (Sulfadoxine/pyrimethamine), and presumably neutral SNPs for parasite strain differentiation, we first evaluated our data after setting a background sign...
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PMID: 20587031
PDF is available here.
PDF is available here.
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (368)1911 2010
Abstract
Systems where the present rate of change of the state depends on the past values of the higher rates of change of the state are described by so-called advanced functional differential equations (AFDEs). In an AFDE, the highest derivative of the state-space coordinate appears with delayed argument on...
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PMID: 20008412
PDF is available here.
PDF is available here.
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (368)1911 2010
Abstract
We first show that there exists a bifurcation to a moving front. We then investigate the limit of large delays but weak feedback and obtain a global bifurcation diagram for the propagation speed. Finally, we examine the case of a two-dimensional front with radial symmetry and determine the critical...
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PMID: 20008413
PDF is available here.
PDF is available here.
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (368)1911 2010
Abstract
We undertake a systematic study of the dynamics of Boolean networks to determine the origin of chaos observed in recent experiments. Networks with nodes consisting of ideal logic gates are known to display either steady states, periodic behaviour or an ultraviolet catastrophe where the number of log...
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PMID: 20008414
PDF is available here.
PDF is available here.
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (368)1911 2010
Abstract
We give an overview of coupling schemes of Bernoulli units deduced from chaotic laser systems, different ways to transmit information by chaos synchronization and the advantage of bidirectional over unidirectional coupling with respect to secure communication. We present the protocol for using dynam...
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PMID: 20008407
PDF is available here.
PDF is available here.
Abstract
If empirical estimates of disclosure risk are included in informed consent statements for surveys or other forms of research, participants must be able to understand the information provided. Using data from an online vignette-based experiment, this article explores the role that numeracy or quantit...
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PMID: 19919316
PDF is available here.
PDF is available here.
Abstract
We propose 'Fusion of Activation Functions' (FAF) in which different conventional activation functions (AFs) are combined to compute final activation. This has not been studied extensively yet. One of the sub goals of the paper is to check the role of linear AFs in combination. We investigate whethe...
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PMID: 20039466
PDF is available here.
PDF is available here.
Global exponential stability of fuzzy interval delayed neural networks with impulses on time scales.
Abstract
We investigate the existence and uniqueness of equilibrium point for fuzzy interval delayed neural networks with impulses on time scales. And we give the criteria of the global exponential stability of the unique equilibrium point for the neural networks under consideration using Lyapunov method. Fi...
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PMID: 20039467
PDF is available here.
PDF is available here.
Abstract
A novel approach for no-reference video quality measurement is proposed in this paper. Firstly, various feature extraction methods are used to quantify the quality of videos. Then, a support vector regression model is trained and adopted to predict unseen samples. Six different regression models are...
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PMID: 20039468
PDF is available here.
PDF is available here.
Abstract
A new design of Spiking Neural Networks is proposed and fabricated using a 0.35 microm CMOS technology. The architecture is based on the use of both digital and analog circuitry. The digital circuitry is dedicated to the inter-neuron communication while the analog part implements the internal non-li...
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PMID: 20039469
PDF is available here.
PDF is available here.
Abstract
Load shedding is some of the essential requirement for maintaining security of modern power systems, particularly in competitive energy markets. This paper proposes an intelligent scheme for fast and accurate load shedding using neural networks for predicting the possible loss of load at the early s...
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PMID: 20039470
PDF is available here.
PDF is available here.
Abstract
We identify by chaos analysis a surprising possibility that muscarinergic receptors can help the system out of a chaotic regime....
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PMID: 20039463
PDF is available here.
PDF is available here.
Abstract
This paper studies the mechanisms of ionic channels in neurons of lamprey central pattern generator (CPG), such as the N-methyl-D-aspartate (NMDA) receptor channel and the calcium-dependent potassium channel etc. The CPG properties on oscillation attributed to the ionic mechanisms are exploited. The...
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PMID: 20039464
PDF is available here.
PDF is available here.
Abstract
We prove that for pulse-coupled oscillator networks with delayed excitatory coupling, weak asymptotic synchronization cannot occur....
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PMID: 20039465
PDF is available here.
PDF is available here.
Abstract
We propose a mathematical model that takes into account the dynamics of functional and dysfunctional beta-cells, regulatory T cells, and pathogenic T cells. The model assumes that all individuals carrying susceptible HLA haplotypes will develop variable degrees of T1DM-related immunologic abnormalit...
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PMID: 19835428
PDF is available here.
PDF is available here.
Abstract
The present investigation assesses specific numerical difficulties in a patient (SJ) with basal ganglia (BG) dysfunction. While previous studies on number processing in BG disorders typically tested arithmetic facts by production tasks, the present study uses production, recognition (verification, m...
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PMID: 19370479
PDF is available here.
PDF is available here.
Abstract
We demonstrate that Temporal Binding is a robust finding that can also be reliably achieved with a Magnitude Estimation procedure, and that occurs over intervals far greater than those previously explored. Implications for the underlying mechanisms are discussed.
PsycINFO Database Record (c) 2009 AP...
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PMID: 19803655
PDF is available here.
PDF is available here.
Neuroreport (20)14 2009
Abstract
We investigated whether the mental representation of numbers was abstract amodal or modality-dependent by taking N270 as an index, the amplitude that represents the conflict between internal representation and perceptual input. Participants were instructed to justify whether the magnitude of the sec...
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PMID: 19623092
PDF is available here.
PDF is available here.
Abstract
We examined cortical activation as a function of two different calculation strategies for mentally solving multidigit multiplication problems. The school strategy, equivalent to long multiplication, involves working from right to left. The expert strategy, used by "lightning" mental calculators (Sta...
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PMID: 19679763
PDF is available here.
PDF is available here.
Scientific American (301)3 2009
Abstract
NeuroImage (47)1 2009
Abstract
We used fMRI to compare brain responses in 25 females and 24 males during a mental arithmetic task involving 3-operand addition and subtraction. We also used voxel-based morphometry (VBM) to examine gender differences in brain structure. Although females and males did not differ in accuracy or respo...
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PMID: 19376239
PDF is available here.
PDF is available here.
Behavioral and Brain Sciences (32)3-4 2009
Abstract
We discuss and challenge the claim that numerical representation is abstract. We discuss the principles of cortical organisation with special reference to number and also discuss methodological and theoretical limitations that apply to numerical cognition and also to the field of cognitive neuroscie...
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PMID: 19712504
PDF is available here.
PDF is available here.
Abstract
We examined cell size distributions in populations of lymphoblasts and applied a mathematical analysis to calculate how growth rates vary with both cell size and the cell cycle. Our results show that growth rate is size-dependent throughout the cell cycle. After initial growth suppression, there is...
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PMID: 19589995
PDF is available here.
PDF is available here.
Abstract
We study the interface morphology of a 2D simulation of an avascular tumor composed of identical cells growing in an homogeneous healthy tissue matrix (TM), in order to understand the origin of the morphological changes often observed during real tumor growth. We use the Glazier-Graner-Hogeweg model...
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PMID: 19234746
PDF is available here.
PDF is available here.
Abstract
Behavioral and brain imaging research indicates that human infants, humans adults, and many nonhuman animals represent large nonsymbolic numbers approximately, discriminating between sets with a ratio limit on accuracy. Some behavioral evidence, especially with human infants, suggests that these repr...
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PMID: 18752403
PDF is available here.
PDF is available here.
Revista Medica de Chile (137)6 2009
Abstract
Abstract
We propose that there needs to be some consideration of how the link between counting and set-comparison is achieved during formative years of numeracy. We work through the implications to identify how this crucial change in numerical understanding occurs....
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PMID: 19375377
PDF is available here.
PDF is available here.
Journal of Mathematical Biology (58)4-5 2009
Abstract
We propose to describe the interaction forces involving the extracellular matrix via some concepts coming from viscoplasticity. We then apply the model to the description of the growth of tumour cords and the formation of fibrosis....
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PMID: 18853162
PDF is available here.
PDF is available here.
Abstract
Previous research on perceiving spatial layout has found that people often exhibit normative biases in their perception of the environment. For instance, slant is typically overestimated and distance is usually underestimated. Surprisingly, however, the perception of height has rarely been studied....
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PMID: 19331498
PDF is available here.
PDF is available here.
Cognitive Psychology (58)2 2009
Abstract
We sought to corroborate this relation between grammatical number and integer acquisition within English. We found a significant correlation between children’s comprehension of numerals and a large set of natural language quantifiers and determiners, even when controlling for effects due to age. H...
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PMID: 18799157
PDF is available here.
PDF is available here.
Journal of Mathematical Biology (58)4-5 2009
Abstract
We present a new multiscale mathematical model for solid tumour growth which couples an improved model of tumour invasion with a model of tumour-induced angiogenesis. We perform nonlinear simulations of the multi-scale model that demonstrate the importance of the coupling between the development and...
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PMID: 18781303
PDF is available here.
PDF is available here.
Journal of Mathematical Biology (58)4-5 2009
Abstract
We develop a numerical algorithm based on an adaptive Cartesian block-structured mesh refinement scheme. A centered-difference approximation is used for the space discretization so that the scheme is second order accurate in space. An implicit discretization in time is used which results in nonlinea...
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PMID: 18787827
PDF is available here.
PDF is available here.
Animal Cognition (12)2 2009
Abstract
Inoue and Matsuzawa (Curr Biol 17: R1004-R1005, 2007) showed that with an accuracy of approximately 79%, the juvenile chimpanzee, Ayumu, could recall the position and order of a random subset of five Arabic numerals between one and nine when those numerals were presented for only 210 ms on a compute...
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PMID: 19115068
PDF is available here.
PDF is available here.
Abstract
Revista de Neurologia (49)3 2009
Abstract
In the last years the understanding of cognitive disorders involved in developmental dyscalculia has remarkably increased, but it is nonetheless insufficient. Additional research is required in order to achieve a comprehensive cognitive model of numerical processing development and its disorders. Th...
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PMID: 19621309
PDF is available here.
PDF is available here.
Abstract
We have proposed different controllers that are based on fuzzy logic and so do not use mathematical modelling, which in general is nonlinear, complex and suffers from uncertainties. PI fuzzy controllers are physically related to classical PI and PID controllers, which are extremely popular. The para...
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PMID: 19848860
PDF is available here.
PDF is available here.
American Annals of the Deaf (153)5 2009
Abstract
A qualitative study is described that sought to examine the relationship between young deaf children's level of mathematics ability ("more successful" and "less successful" as defined by scores on the Test of Early Mathematics Ability-3, Ginsburg & Baroody, 2003) and the opportunities available to d...
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PMID: 19350955
PDF is available here.
PDF is available here.
Abstract
Much has been written on the learning needs of dyslexic and dyscalculic students in primary and early secondary education. However, it is not clear that the necessary disability support staff and specialist literature are available to ensure that these needs are being adequately met within the conte...
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PMID: 20165516
PDF is available here.
PDF is available here.