Minimalistic behavioral rule derived from bacterial chemotaxis in a stochastic resonance setup
Shuhei Ikemoto, Fabio DallaLibera, Koh Hosoda, and Hiroshi Ishiguro
Animals are able to cope with the noise, uncertainties, and complexity of the real world. Often even elementary living beings, equipped with very limited sensory organs, are able to reach regions favorable to their existence, using simple stochastic policies. In this paper we discuss a minimalistic ... [Phys. Rev. E 85, 021905 ] published .
Nonlinear effective-medium theory of disordered spring networks
M. Sheinman, C. P. Broedersz, and F. C. MacKintosh
Disordered soft materials, such as fibrous networks in biological contexts, exhibit a nonlinear elastic response. We study such nonlinear behavior with a minimal model for networks on lattice geometries with simple Hookian elements with disordered spring constant. By developing a mean-field approach ... [Phys. Rev. E 85, 021801 ] published .
Fluid dynamics of moving fish in a two-dimensional multiparticle collision dynamics model
Daniel A. P. Reid, H. Hildenbrandt, J. T. Padding, and C. K. Hemelrijk
The fluid dynamics of animal locomotion, such as that of an undulating fish, are of great interest to both biologists and engineers. However, experimentally studying these fluid dynamics is difficult and time consuming. Model studies can be of great help because of their simpler and more detailed an ... [Phys. Rev. E 85, 021901 ] published .
Monte Carlo simulation-based approach to model the size distribution of metastatic tumors
Esha Maiti
The size distribution of metastatic tumors and its time evolution are traditionally described by integrodifferential equations and stochastic models. Here we develop a simple Monte Carlo approach in which each event of metastasis is treated as a chance event through random-number generation. We demo ... [Phys. Rev. E 85, 012901 ] published .
Interrelating anatomical, effective, and functional brain connectivity using propagators and neural field theory
P. A. Robinson
It is shown how to compute effective and functional connection matrices (eCMs and fCMs) from anatomical CMs (aCMs) and corresponding strength-of-connection matrices (sCMs) using propagator methods in which neural interactions play the role of scatterings. This analysis demonstrates how network effec ... [Phys. Rev. E 85, 011912 ] published .
Optimal Intermittence in Search Strategies under Speed-Selective Target Detection
Daniel Campos, Vicenc Mendez, and Frederic Bartumeus
Random search theory has been previously explored for both continuous and intermittent scanning modes with full target detection capacity. Here we present a new class of random search problems in which a single searcher performs flights of random velocities, the detection probability when it passes ... [Phys. Rev. Lett. 108, 028102 ] published .
Velocity-jump models with crowding effects
Katrina K. Treloar, Matthew J. Simpson, and Scott W. McCue
Velocity-jump processes are discrete random-walk models that have many applications including the study of biological and ecological collective motion. In particular, velocity-jump models are often used to represent a type of persistent motion, known as a run and tumble, that is exhibited by some is ... [Phys. Rev. E 84, 061920 ] published .
Finite Element Simulation of Mechanical Behaviors of Coronary Stent in a Vessel with Plaque
M. Imani, M. H. Hojjati, N. Eshghi, and A. M. Goudarzi
The paper presents results of the finite element analysis of a coronary stent used in a treatment of blood vessel stenosis. This analysis is an efficient way to modify the design of stent and its performance. The work focuses on the Medtronic AVE Modular stent S7. A nonlinear model that contains bal ... [AIP Conf. Proc. 1400, 523 (2011)] published Wed Dec 28, 2011.
Stress Analysis of Human Femur under Different Loadings
A. Latif Aghili, M. H. Hojjati, A. Moazemi Goudarzi, and M. Rabiee
Stress fracture is a type of biomechanical failure of bone caused by loads during intense physical training. This failure is very important for aged persons and athletics. Because of cell death, in some cases after emergency surgery the injured person may suffer from lifelong disability.In this rese ... [AIP Conf. Proc. 1400, 518 (2011)] published Wed Dec 28, 2011.
Heart simulation with surface equations for using on MCNP code
D. Rezaei-Ochbelagh, S. Salman-Nezhad, A. Asadi, and A. Rahimi
External photon beam radiotherapy is carried out in a way to achieve an as low as possible a dose in healthy tissues surrounding the target. One of these surroundings can be heart as a vital organ of body. As it is impossible to directly determine the absorbed dose by heart, using phantoms is one wa ... [AIP Conf. Proc. 1400, 253 (2011)] published Wed Dec 28, 2011.
Leonardo's Rule, Self-Similarity, and Wind-Induced Stresses in Trees
Christophe Eloy
Examining botanical trees, Leonardo da Vinci noted that the total cross section of branches is conserved across branching nodes. In this Letter, it is proposed that this rule is a consequence of the tree skeleton having a self-similar structure and the branch diameters being adjusted to resist wind- ... [Phys. Rev. Lett. 107, 258101 ] published .
Giomi and Mahadevan Reply:
L. Giomi and L. Mahadevan
A Reply to the Comment by E.L. Starostin and G.H.M. van der Heijden. ... [Phys. Rev. Lett. 107, 239802 ] published .
Comment on Statistical Mechanics of Developable Ribbons
E. L. Starostin and G. H. M. van der Heijden
A Comment on the Letter by L. Giomi and L. Mahadevan, [Phys. Rev. Lett. 104, 238104 (2010).]. ... [Phys. Rev. Lett. 107, 239801 ] published .
Stochastic oscillations in models of epidemics on a network of cities
G. Rozhnova, A. Nunes, and A. J. McKane
We carry out an analytic investigation of stochastic oscillations in a susceptible-infected-recovered model of disease spread on a network of n cities. In the model a fraction f of individuals from city k commute to city j, where they may infect, or be infected by, others. Starting from a continuous ... [Phys. Rev. E 84, 051919 ] published .
Gene Expression Noise Facilitates Adaptation and Drug Resistance Independently of Mutation
Daniel A. Charlebois, Nezar Abdennur, and Mads Kaern
We show that the effect of stress on the reproductive fitness of noisy cell populations can be modeled as a first-passage time problem, and demonstrate that even relatively short-lived fluctuations in gene expression can ensure the long-term survival of a drug-resistant population. We examine how th ... [Phys. Rev. Lett. 107, 218101 ] published .
Dosimetry of a new P-32 ophthalmic applicator
Chang Heon Choi, Hyon Soo Han, Kwang-Jae Son, Ul Jae Park, Jun Sig Lee et al.
Symmetries, stability, and control in nonlinear systems and networks
Giovanni Russo and Jean-Jacques E. Slotine
This paper discusses the interplay of symmetries and stability in the analysis and control of nonlinear dynamical systems and networks. Specifically, it combines standard results on symmetries and equivariance with recent convergence analysis tools based on nonlinear contraction theory and virtual d ... [Phys. Rev. E 84, 041929 ] published .
A Novel Method for Quantifying In-Vivo Regional Left Ventricular Myocardial Contractility in the Border Zone of a Myocardial Infarction
Lik Chuan Lee, Jonathan F. Wenk, Doron Klepach, Zhihong Zhang, David Saloner et al.
Homogeneous contractility is usually assigned to the remote region, border zone (BZ), and the infarct in existing infarcted left ventricle (LV) mathematical models. Within the LV, the contractile function is therefore discontinuous. Here, we hypothesize that the BZ may in fact define a smooth linear ... [J. Biomech. Eng. 133, 094506 (2011)] published Tue Oct 11, 2011.
A PENELOPE-based system for the automated Monte Carlo simulation of clinacs and voxelized geometriesapplication to far-from-axis fields
Josep Sempau, Andreu Badal, and Lorenzo Brualla
Reaction-diffusion front crossing a local defect
Jean-Guy Caputo and Benoit Sarels
The interaction of a Zeldovich-Frank-Kamenetsky reaction-diffusion front with a localized defect is studied numerically and analytically. For the analysis, we start from conservation laws and develop simple, collective variable, ordinary differential equations for the front position and width. Their ... [Phys. Rev. E 84, 041108 ] published .
Effect of robustness on selection of a mutation-rate regulating gene
Mark Ancliff and Jeong-Man Park
We study the evolution of a population of sequences, where each sequence is divided into a reproduction-rate (fitness) encoding part and a mutation-rate regulating part. Evolutionary selection acts on the sequence both by a direct fitness landscape and by indirect selection on a mutation landscape t ... [Phys. Rev. E 84, 031925 ] published .
Bethe-Peierls approximation and the inverse Ising model. (arXiv:1112.3501v2 [cond-mat.dis-nn] UPDATED)
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