Carbon Metamorphoses in a Medium with Varying Ionic Concentration

2000 ◽  
Vol 661 ◽  
Author(s):  
V. Bouda ◽  
J. Chladek
Keyword(s):  
Time Delay ◽  
Carbon Black ◽  
Natural Water ◽  
Ac Conductivity ◽  
Polymer Melt ◽  
Ionic Concentration ◽  
Complex Behavior ◽  
Self Organized

ABSTRACTCarbon black in a polymer melt was used to model self-organized processes. A gradual growth of ionic concentration in the polymer melt induced a complex behavior, including a rapid increase in AC conductivity after a time delay. Colloid theory can provide an effective interpretation. The metamorphoses of the carbon black assembly include soft axial order generation, soft lateral order generation, axial condensation, and lateral condensation of carbon black particles, respectively. Similar processes are expected to be effective in generating complex carbonaceous organic structures in natural water.

Adaptive stochastic resonance in self-organized small-world neuronal networks with time delay

2015 ◽  
Vol 29 (1-3) ◽  
pp. 346-358 ◽  
Author(s):  
Haitao Yu ◽  
Xinmeng Guo ◽  
Jiang Wang ◽  
Chen Liu ◽  
Bin Deng ◽  
...  
Keyword(s):  
Time Delay ◽  
Stochastic Resonance ◽  
Neuronal Networks ◽  
Small World ◽  
Self Organized

scholarly journals Embodied robots driven by self-organized environmental feedback

2019 ◽  
Vol 27 (5) ◽  
pp. 285-294 ◽  
Author(s):  
Frederike Kubandt ◽  
Michael Nowak ◽  
Tim Koglin ◽  
Claudius Gros ◽  
Bulcsú Sándor
Keyword(s):  
Single Neuron ◽  
Emergent Behavior ◽  
Dynamical System Theory ◽  
Complex Behavior ◽  
Mechanical Coupling ◽  
Self Organized ◽  
Local And Global Bifurcations ◽  
The Individual ◽  
Organizing Principles ◽  
Environmental Feedback

Which kind of complex behavior may arise from self-organizing principles? We investigate this question for the case of snake-like robots composed of passively coupled segments, with every segment containing two wheels actuated separately by a single neuron. The robot is self-organized both on the level of the individual wheels and with respect to inter-wheel coordination, which arises exclusively from the mechanical coupling of the individual wheels and segments. For the individual wheel, the generating principle proposed results in locomotive states that correspond to self-organized limit cycles of the sensorimotor loop. Our robot interacts with the environment by monitoring the state of its actuators, that is, via propriosensation. External sensors are absent. In a structured environment the robot shows complex emergent behavior that includes pushing movable blocks around, reversing direction when hitting a wall, and turning when climbing a slope. On flat grounds the robot wiggles in a snake-like manner, when moving at higher velocities. We also investigate the emergence of motor primitives, namely, the route to locomotion, which is characterized by a series of local and global bifurcations in terms of dynamical system theory.

scholarly journals Complex Behavior Analysis of a Fractional-Order Land Dynamical Model with Holling-II Type Land Reclamation Rate on Time Delay

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Li Wu ◽  
Zhouhong Li ◽  
Yuan Zhang ◽  
Binggeng Xie
Keyword(s):  
Time Delay ◽  
Fractional Order ◽  
Land Reclamation ◽  
Variable Order ◽  
Transformation Rate ◽  
Complex Behavior ◽  
Bifurcation Parameter ◽  
Type Transformation ◽  
The Stability ◽  
Variable Order Fractional Derivative

In this paper, a fractional-order land model with Holling-II type transformation rate and time delay is investigated. First of all, the variable-order fractional derivative is defined in the Caputo type. Second, by applying time delay as the bifurcation parameter, some criteria to determine the stability and Hopf bifurcation of the model are presented. It turns out that the time delay can drive the model to be oscillatory, even when its steady state is stable. Finally, one numerical example is proposed to justify the validity of theoretical analysis. These results may provide insights to the development of a reasonable strategy to control land-use change.

scholarly journals Self-Organized Criticality and Standard Model Parameters

2020 ◽  
Author(s):  
Ervin Goldfain
Keyword(s):  
Dynamical Systems ◽  
Standard Model ◽  
Metastable States ◽  
Model Parameters ◽  
Complex Behavior ◽  
Mixing Angles ◽  
Universal Scaling ◽  
Self Organized ◽  
Self Organized Criticality

As paradigm of complex behavior, Self-organized Criticality (SOC) reflects the ability of nonequilibrium dynamical systems to self-adjust into metastable states that are scale independent. The goal of this report is to tentatively show that the hierarchy of Standard Model masses and mixing angles follows from the universal scaling attributes of SOC.

New Vulcanizing Agents for Ethylene-Propylene Elastomers. II

1962 ◽  
Vol 35 (4) ◽  
pp. 1091-1100
Author(s):  
Peter E. Wei ◽  
John Rehner
Keyword(s):  
Zinc Oxide ◽  
Iron Oxide ◽  
Carbon Black ◽  
Periodic System ◽  
Chemical Diversity ◽  
Complex Behavior ◽  
Iron Compounds ◽  
Ethylene Propylene ◽  
Ethylene Propylene Rubber

Abstract In searching for new vulcanizing systems for ethylene-propylene elastomers, we have found several more classes of active agents, heretofore undisclosed. They are: (a) perhaloalkanes and some polyhaloalkanes; (b) polyhalocycloalkenes; and (c) poly-N-halobenzoguanamines. Specific examples are: hexachloroethane, octachloropropane, octachlorocyclopentene, perchlorofulvalene, and N,N,N′,N′-tetrachlorobenzoguanamine. These agents are all effective in ethylene-propylene rubber, and some are capable of vulcanizing polyethylene, polypropylene, polyisobutylene, butyl, and highly unsaturated rubbers and their blends. The agents are most effective in the presence of sulfur. All are active in carbon black stocks, and at least some are active in mineral-filled and oil-extended stocks. Some of the vulcanizing agents can be accelerated by certain oxides and salts of metals widely distributed over the periodic system. Among the most active accelerators are iron compounds, such as iron tallate, stearate, naphthenate, octoate, and oxalate, and corresponding combinations of iron oxide and the free acids. These accelerators are antagonized by the presence of zinc oxide. The chemical diversity of these classes of vulcanizing agents and the complex behavior of the accelerators mentioned preclude an explanation of the vulcanization chemistry at this time.

Self‐Organized Criticality: Emergent Complex Behavior in Physical and Biological Systems

Physics Today ◽  
1999 ◽  
Vol 52 (10) ◽  
pp. 76-78 ◽  
Author(s):  
Henrik Jeldtoft Jensen ◽  
Marcelo O. Magnasco
Keyword(s):  
Biological Systems ◽  
Complex Behavior ◽  
Self Organized ◽  
Self Organized Criticality

Dielectric Properties of Polyester Reinforced with Carbon Black Particles

2011 ◽  
Vol 110-116 ◽  
pp. 170-176
Author(s):  
Omed Ghareb Abdullah ◽  
Dana Abdull Tahir ◽  
Gelas Mukaram Jamal ◽  
Salah Raza Saeed
Keyword(s):  
Activation Energy ◽  
Dielectric Constant ◽  
Carbon Black ◽  
Low Temperatures ◽  
Ac Conductivity ◽  
Low Frequency ◽  
Frequency Range ◽  
Exponential Factor ◽  
Increasing Temperature ◽  
Dielectric Permittivity And Loss

Dielectric constant and ac conductivity of Polyester doped with carbon black are investigated in the frequency range (0.5-103) KHz and within the temperature range (26-80) oC. Dielectric permittivity and loss tangent reduced with increasing frequency and increase with increasing temperature. The ac conductivity σac for all samples were found to be weak frequency dependent at low frequency, however vary with frequency as a power law ωs at higher frequency range. The variation of frequency exponential factor s between 0.63 and 0.77, indicates a dominant hopping process at low temperatures. From the temperature dependence of dc conductivity, the increase of activation energy was observed with carbon black concentrations.

High-Dilution Carbon-Black/Polymer Composites: Hierarchical Percolating Network Derived from Hz to THz ac Conductivity

1997 ◽  
Vol 78 (9) ◽  
pp. 1755-1758 ◽  
Author(s):  
L. J. Adriaanse ◽  
J. A. Reedijk ◽  
P. A. A. Teunissen ◽  
H. B. Brom ◽  
M. A. J. Michels ◽  
...  
Keyword(s):  
Carbon Black ◽  
Polymer Composites ◽  
Ac Conductivity ◽  
High Dilution ◽  
Percolating Network
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