Related Experiment Videos
Effect of resource constraints on intersimilar coupled networks
1School of Computer Science, University of St. Andrews, Jack Cole Building, North Haugh, St. Andrews, Fife KY16 9SX, Scotland, UK. saray@cs.st-andrews.ac.uk
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 2, 2013
Summary
Coupled network models reveal that resource constraints alter epidemic spread. Negatively correlated networks lower epidemic thresholds under constraints, unlike unconstrained models.
Area of Science:
- Network science
- Epidemiology
- Complex systems
Background:
- Real-world networks are interconnected, influencing system-wide processes.
- Coupled networks can enhance connectivity but face resource contention.
- Previous studies focused on unconstrained flow processes in coupled networks.
Purpose of the Study:
- To investigate the impact of resource constraints on epidemic dynamics in coupled networks.
- To compare epidemic thresholds in constrained versus unconstrained coupled network models.
- To explore how coupling correlation affects constrained epidemic spread.
Main Methods:
- Modeling a constrained susceptible-infected-recovered (SIR) process.
- Utilizing a system of two random networks sharing nodes.
- Analyzing epidemic thresholds under varying coupling correlations and resource limits.
Main Results:
- Unconstrained SIR models show lower thresholds with positively correlated (intersimilar) coupling.
- Constrained SIR models exhibit lower epidemic thresholds with negatively correlated (interdissimilar) coupling.
- Resource limitations reverse the effect of coupling correlation on epidemic thresholds.
Conclusions:
- Resource constraints introduce qualitative differences in epidemic spread between single and coupled networks.
- Negatively correlated coupling can be more resilient to epidemics under resource limitations.
- Findings highlight the importance of considering resource contention in coupled network dynamics.
Related Concept Videos
02:12Short-distance Transport of Resources
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
01:25Network Function of a Circuit
Frequency response analysis in electrical circuits provides vital insights into a circuit's behavior as the frequency of the input signal changes. The transfer function, a mathematical tool, is instrumental in understanding this behavior. It defines the relationship between phasor output and input and comes in four types: voltage gain, current gain, transfer impedance, and transfer admittance. The critical components of the transfer function are the poles and zeros.
01:23Relation Between the Distributed Load and Shear
Understanding the relationship between the distributed load and shear force in structural analysis is crucial for analyzing beams subjected to various loading conditions. Consider the case of a beam experiencing a distributed load, two concentrated loads, and a couple moment.
01:10Interference: Path Lengths
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
01:26Causes of Similarity-Dissimilarity Effect
The similarity-dissimilarity effect, a fundamental concept in social psychology, explains how interpersonal similarities and differences influence attraction and social interactions. This effect is supported by three key psychological perspectives: balance theory, social comparison theory, and consensual validation.Balance Theory and Cognitive ConsistencyBalance theory, developed by Fritz Heider, posits that individuals seek cognitive consistency in their relationships. When two people share...
01:27¹H NMR: Long-Range Coupling
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.