The first monolithic realization of the nonlinear element in Chua's circuit, now generally called diode, is reported. has been fabricated using a CMOS integrated circuit technology. It can be used as basic component for experimental synthesis broad class circuits, including cellular neural networks, which exhibits an extremely rich variety bifurcation, chaotic, and wave phenomena.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

In this work, we experimentally investigate the narrow escape problem using self-propelled camphor-infused discs, which have possibility to from a bounded circular domain through an opening in boundary. To analyze statistical properties of problem, proposed two experimental protocols: first, control setup within closed where disc encounters target simulating on boundary, and second real is placed boundary domain. These setups allow us compare how differ between simulated (or fictitious)...

Small added noise has been predicted to direct certain classes of chemical systems towards a specific enantiomeric direction, with the dependence product asymmetry on levels being non-monotonic and nonlinear. Associating selection in such reactions different outputs, varying encode inputs, we observe that response system mirrors input-output relations fundamental logic operations. So complex enantioselection, under influence noise, allows effectively behave as gate. This observation may have...

A comprehensive kinetic analysis of three prototypical autocatalytic cycle models based on the absolute asymmetric Soai reaction is presented. The models, which can give rise to amplification enantiomeric excess and mirror-image symmetry breaking, vary by their monomeric, dimeric or trimeric order assumed catalytic species. Our numerical approach considered entire chiral combinatorics diastereomeric interactions in as well multiplicity coupled reversible reactions without applying fast...

We experimentally study the stochastic transport of a self-propelled camphor boat, driven by Marangoni forces, through crowd passive paper discs floating on water. analyze statistics first passage times active particle to travel from center circular container its boundary. While mean rise monotonically as function covered area fraction φ discs, their fluctuations show non-monotonic behavior - being higher at low and high value compared intermediate values. The reason is traced an interplay...

We report various modes of synchrony observed for a population two, three and four pentanol drops in rectangular channel at the air-water interface. Initially, autonomous oscillations single 1-pentanol drop were studied ferroin DI water solution pre-mixed with some volume pentanol. A performs continuous motion on interface due to Marangoni forces. linear was prepared study uniaxial movement drop(s). Thereafter, systematic self-propelled reported as function volume. Subsequently, coupled...

Chaotic synchronization for a pair of electrochemical oscillators is studied experimentally. The underlying bidirectional coupling between the two achieved by immersing anodes in common electrolytic solution. horizontal distance these electrodes determines strength constant. On monotonically decreasing anodes, different domains chaotic synchronization, namely, no, phase, lag, and complete are identified. Furthermore, dynamics from transition intervals also characterized.

Time delay is introduced in the coupling between a pair of electrochemical cells. As parameters are varied, anodic current two cells oscillate synchrony regimes periodic as well chaotic dynamics. When time varied phase-flip transition observed: relative phase synchronized oscillations changes abruptly by pi . This accompanied an experimentally measurable discontinuous change frequency oscillators.

Abstract Nonlinear effects in asymmetric synthesis are identified by a nonlinear relationship between the enantiomeric excess of product versus that chiral catalyst. Such information is not always sufficient to reveal if active catalyst acts its monomeric or dimeric form. Numerical simulations two kinetic models including monomer and dimer catalysis with Michaelis–Menten‐type reaction mechanism suggest mainly sensitive an analogue Michaelis–Menten constant as well diastereomeric energy...

Do it yourself: An autocatalytic cycle network is introduced to accurately reproduce the unprecedented features of Soai reaction such as huge asymmetric autoamplification and spontaneous mirror-symmetry breaking. In contrast previous attempts, which were based on formal kinetics, present mechanism involves interconnected realistic structures including dimers, trimers tetramers resembles stereoselective template-directed self-replication (see picture).

Abstract A kinetic and thermodynamic model of the Soai reaction is presented. This allows quantitative determination five rates constants one equilibrium constant. The realistic as it integrates results most recently published XRD structural data DFT calculations selected experimental data. Equipped with extracted parameters from numerical fitting time evolution both substrate concentration enantiomeric excess, was able to mimic strong asymmetric amplification extremely low initial excess...

Synchronization for a pair of chaotic oscillators is studied both numerically and experimentally. The two are coupled unidirectionally, namely, in the master slave configuration. When coupling strength systematically varied, different regimes synchronization such as no, phase, lag complete identified. existence natural unidirectional by virtue small parameter mismatch between oscillators. Numerical calculations carried out Rössler model whereas experiments performed using electrochemical

Aperiodic spike sequences, characterized by an almost constant amplitude and randomly distributed interspike intervals, are studied experimentally in electrochemical cell. In the first set of experiments, these aperiodic trains converted to regular sequences using periodic forcing. Subsequently, synchronization two such irregular time series is achieved for appropriate bidirectional coupling. Finally, reproducibility profiles evoked virtue externally superimposed stochastic stimulus.

Electric forcing can be used to select and regulate the shape of liquid metals. In this work, we present a transition among different patterns in mercury drop regulated by noise. A stochastic resonancelike phenomenon was observed for two structural transitions metal. first set experiments, from irregular (I) → triangular (T) obtained increasing amplitude biased white second part, elliptical (E) using same kind Periodic resonance corroborated our experiments employing cross-correlation...

Abstract NaClO 3 is achiral in solution. If crystallization performed under a static set‐up, it recognized that the stochastic nucleation probability results racemic mixture of conglomerate. In this paper, we report reexamination from solution petri dishes was conducted over number years and based on count analysis several thousand d‐ vs. l‐ crystals. Remarkably, instead an expected nearly 50/50 coin‐tossing situation for d / l crystal frequency, most our experiments statistically...

In contrast with the conventionally observed mechanism of stochastic resonance (SR) wherein level additive noise is systematically varied a fixed set-point parameter, in this work we report emergence SR phenomena an electrochemical system maintaining same and varying parametric distance from homoclinic bifurcation inherent to system. The experimental involves corrosion metal disk acidic medium under potentiostatic conditions. applied potential used as control parameter anodic current...

Attrition-enhanced chiral symmetry breaking in crystals, known as Viedma deracemization, is a promising method for converting racemic solid phases into enantiomerically pure ones under non-equilibrium conditions. However, many aspects of this process remain unclear. In study, we present new investigation deracemization using comprehensive kinetic rate equation continuous model based on classical primary nucleation theory, crystal growth, and Ostwald ripening. Our approach employs fully...

In this work, we perform experimental and numerical investigations on the dynamics of camphor-infused discs, well-established as active particles in their behavior. Our analysis focuses examining individual these discs within a confined circular domain, revealing that they exhibit characteristics akin to chiral particles. To characterize behavior effectively, introduce methodology for estimating key model parameter values from our experiments, including linear velocity, angular noise...

We applied the so-called chemical kinetics approach to complex bacterial growth patterns that were dependent on liquid-surface-area-to-volume ratio (SA/V) of cultures. The kinetic modeling was based current experimental knowledge in terms autocatalytic growth, its inhibition by metabolite CO 2 , and relief through physical escape inhibitor. model quantitatively reproduces data SA/V-dependent can discriminate between differences dynamics enteropathogenic E. coli JM83 Salmonella typhimurium...

El presente articulo expone el contexto y la dinamica politica del paro Nacional Magisterio sostenido entre Mayo Junio de 2017. Entendiendo un entramado politico cultural propio constitucion “sujetos politicos” que permite lectura cierta configuracion los procesos movilizacion social por educacion desde repertorios instituyentes simbolicos gremio docente. marco las reflexiones se situan aportes academicos proyecto “Alcances politicos Acciones movilizaciones en Colombia 2009 – 2015”...