Explanipedia

Ionic Coulomb blockade controls the current in a short narrow carbon nanotube Open

W. A. T. Gibby, Miraslau L. Barabash, I. A. Khovanov, D. G. Luchinsky, P. V. E. McClintock · 2024

We use all-atom molecular dynamics simulations to investigate ionic conduction in a short, charged, single-wall carbon nanotube. They reveal ionic Coulomb blockade (ICB) oscillations in the current as a function of the fixed charge on the …

Stochastic approach for assessing the predictability of chaotic time series using reservoir computing Open

I. A. Khovanov · 2021

The applicability of machine learning for predicting chaotic dynamics relies heavily upon the data used in the training stage. Chaotic time series obtained by numerically solving ordinary differential equations embed a complicated noise of…

Vibrational and stochastic resonances in driven nonlinear systems: part 2 Open

U. E. Vincent, P. V. E. McClintock, I. A. Khovanov, S. Rajasekar · 2021

Nonlinearity is ubiquitous in both natural and engineering systems. The resultant dynamics has emerged as a multidisciplinary field that has been very extensively investigated, due partly to the potential occurrence of nonlinear phenomena …

Vibrational and stochastic resonances in driven nonlinear systems Open

U. E. Vincent, P. V. E. McClintock, I. A. Khovanov, S. Rajasekar · 2021

Nonlinear systems are abundant in nature. Their dynamics have been investigated very extensively, motivated partly by their multidisciplinary applicability, ranging from all branches of physical and mathematical sciences through engineerin…

Unraveling of a Strongly Correlated Dynamical Network of Residues Controlling the Permeation of Potassium in KcsA Ion Channel Open

Salvatore M. Cosseddu, Eunju Julia Choe, I. A. Khovanov · 2021

The complicated patterns of the single-channel currents in potassium ion channel KcsA are governed by the structural variability of the selectivity filter. A comparative analysis of the dynamics of the wild type KcsA channel and several of…

Changes in Ion Selectivity Following the Asymmetrical Addition of Charge to the Selectivity Filter of Bacterial Sodium Channels Open

O. A. Fedorenko, I. A. Khovanov, Stephen K. Roberts, Carlo Guardiani · 2020

Voltage-gated sodium channels (NaVs) play fundamental roles in eukaryotes, but their exceptional size hinders their structural resolution. Bacterial NaVs are simplified homologues of their eukaryotic counterparts, but their use as models o…

Characterisation of aeroelastic harvester efficiency by measuring transient growth of oscillations Open

SA Harvey, I. A. Khovanov, Yuichi Murai, Petr Denissenko · 2020

With growing demand for small autonomous electrical devices, such as those in wireless sensor networks, energy harvesting has attracted interest with the promise of low maintenance and sustainable power sources. Galloping energy harvesters…

Mechanism of resonant enhancement of electron drift in nanometer semiconductor superlattices subjected to electric and inclined magnetic fields Open

S. M. Soskin, I. A. Khovanov, P. V. E. McClintock · 2019

We address the increase of electron drift velocity that arises in semiconductor superlattices (SLs) subjected to constant electric and magnetic fields. It occurs if the magnetic field possesses nonzero components both along and perpendicul…

Prehistory probability distribution of ionic transitions through a graphene nanopore Open

Carlo Guardiani, Miraslau L. Barabash, W. A. T. Gibby, D. G. Luchinsky, I. A. Khovanov , et al. · 2019

We analyze selective ionic conduction through an artificial nanopore in a single graphene sheet, using molecular dynamics simulations and the prehistory probability distribution. We assess position-dependent changes in the number and orien…

Unsolved Problems of Noise:Preface to the UPoN-2018 Special Issue of FNL Open

I. A. Khovanov, P. V. E. McClintock · 2019

Noise is universal and multi-faceted. In everyday life, the aspects we encounter tend to be annoying, for example, loud conversations when we wish to enjoy a quiet cup of tea, or students chatting during a lecture. But acoustic noise can s…

The dynamics of quasiparticles in a toy model of the KcsA biological ion channel Open

Miraslau L. Barabash, W. A. T. Gibby, Carlo Guardiani, D. G. Luchinsky, I. A. Khovanov , et al. · 2019

We study the highly-concerted motion of ions in a narrow biological ion channel (KcsA) by considering the notion of a quasiparticle, with specific focus on the transition process. Namely, we show that the ion entering or exi…

Prehistory probability distribution of ion transition through graphene nanopore Open

Carlo Guardiani, Miraslau L. Barabash, W. A. T. Gibby, D. G. Luchinsky, I. A. Khovanov , et al. · 2019

We analyze selective ionic conduction through an artificial nanopore in a single graphene sheet, using molecular dynamics simulations and the prehistory probability distribution. We assess position-dependent changes in the number and orien…

A galloping energy harvester with flow attachment Open

SA Harvey, I. A. Khovanov, Petr Denissenko · 2019

Aeroelastic energy harvesters are a promising technology for powering wireless sensors and microelectromechanical systems. In this letter, we present a harvester inspired by the trembling of aspen leaves in barely noticeable winds. The gal…

Control of heart rate through guided high-rate breathing Open

Sean Perry, Natasha Khovanova, I. A. Khovanov · 2019

Understanding the complex dynamics of cardio-respiratory coupling sheds light on the underlying mechanisms governing the communication between these two physiological systems. Previous research has predominantly considered the coupling at …

Different roles for aspartates and glutamates for cation permeation in bacterial sodium channels Open

Carlo Guardiani, O. A. Fedorenko, I. A. Khovanov, Stephen K. Roberts · 2018

A key driving force for ion channel selectivity is represented by the negative charge of the Selectivity Filter carried by aspartate (D) and glutamate (E) residues. However, the structural effects and specific properties of D and E residue…

On the selectivity of the NaChBac channel: an integrated computational and experimental analysis of sodium and calcium permeation Open

Carlo Guardiani, O. A. Fedorenko, Stephen K. Roberts, I. A. Khovanov · 2017

A single calcium ion strongly binds to the glutamate ring of NaChBac that leads to the tiny calcium influx current.

Sodium Binding Sites and Permeation Mechanism in the NaChBac Channel: A Molecular Dynamics Study Open

Carlo Guardiani, P. Mark Rodger, O. A. Fedorenko, Stephen K. Roberts, I. A. Khovanov · 2016

NaChBac was the first discovered bacterial sodium voltage-dependent channel, yet computational studies are still limited due to the lack of a crystal structure. In this work, a pore-only construct built using the NavMs template was investi…

Regular Rather than Chaotic Origin of the Resonant Transport in Superlattices Open

S. M. Soskin, I. A. Khovanov, P. V. E. McClintock · 2015

We address the enhancement of electron transport in semiconductor superlattices that occurs in combined electric and magnetic fields when cyclotron rotation becomes resonant with Bloch oscillations. We show that the phenomenon is regular i…

I. A. Khovanov YOU? Author Swipe