A5049875446- Theoretical and Computational Physics
- Stochastic processes and statistical mechanics
- Business, Innovation, and Economy
- Finance, Taxation, and Governance
- Advanced Text Analysis Techniques
- Diffusion and Search Dynamics
- Complex Systems and Time Series Analysis
- Advanced Thermodynamics and Statistical Mechanics
- Material Dynamics and Properties
- stochastic dynamics and bifurcation
- Quantum Mechanics and Applications
- Facility Location and Emergency Management
- Natural Language Processing Techniques
- Advanced Queuing Theory Analysis
- Topic Modeling
- Fractal and DNA sequence analysis
- Spectroscopy and Quantum Chemical Studies
- Statistical Mechanics and Entropy
- Fractional Differential Equations Solutions
- Healthcare Operations and Scheduling Optimization
- Biomedical Text Mining and Ontologies
- HIV/AIDS Research and Interventions
- Philosophy and History of Science
- Bayesian Methods and Mixture Models
- Quantum and electron transport phenomena
Universidad Nacional de Córdoba
2000-2021
In this paper, we analyze the fractal structure of long human language records by mapping large samples texts onto time series. The particular set up in work is inspired on linguistic basis sense that retains word as fundamental unit communication. results confirm beyond short-range correlations resulting from syntactic rules acting at sentence level, long-range structures emerge written give rise to use words.
1. The study examined the practicality and usefulness of fractal analyses in evaluating temporal organisation avian ambulatory behaviour by using female Japanese quail their home boxes as model system. To induce two locomotion activity levels, we tested half birds without disturbance (Unstimulated) other when food was scattered on floor box after 3 h feeder withdrawal (Stimulated). 2. Ambulatory recorded during 40 min at a resolution 1 s evaluated by: (1) detrended fluctuation (DFA), (2)...
An algebraic derivation is presented which yields the exact solution of mean first-passage and residence times a one-dimensional asymmetric random walk for quenched disorder. Two models disorder are analytically treated. Both absorbing–absorbing reflecting–absorbing boundaries considered. Particularly, interplay between asymmetry studied.
Progression of HIV infection is variable among individuals, and definition disease progression biomarkers still needed. Here, we aimed to categorize the predictive potential several variables using feature selection methods decision trees. A total seventy-five treatment-naïve subjects were enrolled during acute/early infection. CD4+ T-cell counts (CD4TC) viral load (VL) levels determined at enrollment for one year. Immune activation, HIV-specific immune response, Human Leukocyte Antigen...
We consider the quantum thermal statistics à la Gibbs–Shannon–Szilard–Jaynes based on q-entropies Sq[ρ]=(q−1)−1(1−tr(ρq)) (0<q≠1) and non-standard ‘‘internal energy’’ functionals Uq[ρ]=tr(ρqH) proposed by C. Tsallis [J. Stat. Phys. 52, 479–487 (1988)].
We present a unified framework for first-passage time and residence of random walks in finite one-dimensional disordered biased systems. The derivation is based on the exact expansion backward master equation cumulants. dependence initial condition, system size, bias strength explicitly studied models with weak strong disorders. Application to thermally activated processes also developed.
We present the nonisotropic effective-medium approximation to solve diffusion problems in a two-dimensional anisotropic random media. The problem has been worked out by introducing generalization of well-known approximation. A set coupled nonlinear self-consistent equations must be solved find effective rates each direction. have considered (analytically) some particular models short and large frequency limits. dc conductivity is also compared against isotropic case. ac Cole-Cole diagrams...
The evolution of conductivity in granular metal films, as a function thickness and temperature, has been modeled by percolation within the framework theory stochastic transport disordered systems. model was analytically worked out means effective-medium approximation. analytical expression obtained spans entire range resistance, from insulating to globally superconducting behavior, with increasing thickness. Quasireentrant or local superconductivity found our results consequence tunneling...
In this paper, we investigate the quest for a single target, which remains fixed in lattice, by set of independent walkers. The target exhibits fluctuating behavior between trap and an ordinary site whereas walkers perform intermittent kind search strategy. Our searchers carry out their movements one two states, they switch randomly. One these states (the exploratory phase) is symmetric nearest-neighbor random walk other state relocating next-nearest-neighbor walk. By using multistate...
We consider the exit-time problem for a particle diffusing in one-dimensional random medium with global nonrandom bias field. It is found that, small bias, addition to usual renormalization of diffusion coefficient fluctuations hopping rates have effect increasing mean exit-time, independently direction and initial position particle. also introduce an effective-medium approximation that becomes exact limit bias.
The Green function of a tight-binding model with mixed impurities is calculated exactly. spectral properties the one-dimensional lattice, including both extended and localized states, are also analysed authors find at most two states which always non-degenerate. density per site in continuum calculated. Using constructive procedure they obtain eigenfunctions for infinite semi-infinite chain. Some results three-dimensional lattices presented.
A version of the central limit theorem is presented that allows study rate convergence to normal probability density average independent identically distributed random variables. Particular emphasis put on effect due asymmetry An example worked out gives a convincing visual display and its convergence.
The multifractal characterization of the distribution over disorder mean first-passage time in a finite chain is revisited. Both, absorbing-absorbing and reflecting-absorbing boundaries are considered. Two models dichotomic compared our analysis clarifies origin multifractality. phenomenon only present when diffusion anomalous.
Providing uninterrupted response service is of paramount importance for emergency medical services, regardless the operating scenario. Thus, reliable estimates time to critical condition, under which there will be no available servers respond next incoming call, become very useful measures system's performance. In this contribution, we develop a key performance indicator by providing an explicit formula average shortage condition. Our analytical expression function number parallel and...
En este trabajo nos proponemos reconsiderar, desde una perspectiva histórica, la contribución de Albert Einstein a teoría molecular realidad con sus trabajos sobre el movimiento Browniano.
We present predictive tools to calculate the number of ambulances needed according demand entrance calls and time service. Our analysis discriminates between emergency non-urgent calls. First, we consider nonstationary regime where apply previous results first-passage one dimensional random walks. Then, reconsider stationary with a detailed discussion conditional probabilities discuss key performance indicators.
In this paper we analyse the fractal structure of long human-language records by mapping large samples texts onto time series. The particular set up in work is inspired on linguistic basis sense that retains {\em word} as fundamental unit communication. results confirm beyond short-range correlations resulting from syntactic rules acting at sentence level, long-range structures emerge written language give rise to use words.