Related Experiment Video
Updated: Jul 28, 2026
12:06
Molecular Diffusion in Plasma Membranes of Primary Lymphocytes Measured by Fluorescence Correlation Spectroscopy
Published on: February 1, 2017
Efficiency of information spreading in a population of diffusing agents
Summary
This study models information diffusion across a population, finding that spread time depends on population size and lattice dimensions. Information decay affects the final average information degree, showing complex non-monotonic behavior.
Area of Science:
- Complex Systems
- Network Science
- Statistical Physics
Background:
- Understanding information diffusion is crucial in various fields.
- Previous models often simplify agent interactions and spatial structures.
Purpose of the Study:
- To develop and analyze a model for information spreading on a lattice.
- To investigate the scaling laws of information propagation time.
- To examine the impact of information decay on the final information state.
Main Methods:
- Agent-based modeling on a square lattice.
- Numerical simulations to track information spread.
- Analytical approximations for theoretical validation.
Main Results:
- Information spread time scales with population size (N) and lattice size (L) as N(-alpha)L(beta).
- A decay factor (z) introduces history dependence to the final average information degree (tau(av)(z)).
- The average information degree exhibits non-monotonic behavior with respect to N and L, with observable minima.
Conclusions:
- The model provides insights into information diffusion dynamics with spatial constraints and decay.
- Scaling laws reveal how population and spatial factors influence spread time.
- The history-dependent nature of information decay leads to complex emergent behaviors.
Related Concept Videos
01:12Diffusion
Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances, such as molecules or ions, diffuse from an area of high concentration to an area of low concentration in the cytosol or across membranes. Eventually, the concentration will even out, with the substance moving randomly but causing no net change in concentration. Such a state is called dynamic equilibrium, which is essential for maintaining overall...
00:54Distribution and Dispersion
Ecology is the study of how organisms interact with their environment and with one another. An important aspect of ecology is understanding where species are found and how individuals are distributed within those areas. The geographic range of a species refers to the total area where its members are located, while dispersion describes the pattern of spacing of individuals within that range.Geographic Range and Dispersion PatternsWithin a species’ geographic range, individuals may be distributed...
03:48Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion
Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...
01:21Diffusion
Diffusion is a type of passive transport. In passive transport, a substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space. For example, take the diffusion of substances through the air. When someone opens a perfume bottle in a room filled with people, the perfume is at its highest concentration in the bottle and is at its lowest at the edges of the room. The perfume vapor will diffuse, or spread away, from the...
01:17Passive Diffusion: Overview and Kinetics
Passive diffusion is a critical process that allows small lipophilic drugs to cross the cell membrane along a concentration gradient. This mechanism's efficiency depends on four primary factors: the membrane's surface area, the drug's lipid-water partition coefficient, the concentration gradient, and the membrane's thickness.
When administered orally, drugs establish a substantial concentration gradient between the gastrointestinal (GI) lumen and the bloodstream, expediting their diffusion into...
When administered orally, drugs establish a substantial concentration gradient between the gastrointestinal (GI) lumen and the bloodstream, expediting their diffusion into...
01:28Antimicrobial Effectiveness
The effectiveness of antimicrobial agents depends on various factors influencing their ability to eliminate microbial populations. Larger microbial populations require more time for complete eradication, emphasizing the importance of population size analysis when evaluating antimicrobial efficacy.Microbial resistance to antimicrobial agents varies significantly. Highly resilient microorganisms include endospores, gram-negative bacteria, and non-enveloped viruses, while prions are exceptionally...