Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

What are Populations and Communities?00:30

What are Populations and Communities?

38.1K
Overview
38.1K
Cell Size01:22

Cell Size

132.6K
Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (μm)and are considerably smaller than most eukaryotic cells. The smallest bacteria are 0.1 μm in diameter—about a thousand times smaller than eukaryotic cells, which typically range from 10-100 μm.
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding...
132.6K
Community Based Intervention01:30

Community Based Intervention

492
Community-based interventions in mental health represent a paradigm shift from institution-centered care to treatments embedded within the fabric of local communities. By prioritizing inclusion and leveraging existing societal structures, this approach fosters a supportive environment conducive to addressing mental health challenges while promoting individual dignity and agency.
Foundations of Community Mental Health Programs
Central to the success of community-based interventions is the...
492
Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

9.2K
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
9.2K
Brick Sizes01:21

Brick Sizes

356
Brick sizing plays a crucial role in construction, influencing both the aesthetics and structural integrity of buildings. Bricks are defined by three dimensions: width, thickness, and length. They are commonly designed to fit modular measurements, typically in multiples of 4 inches or 8 inches in width, to facilitate uniform construction and compatibility with other building materials.
Modular bricks are the most common type and are sized to include the mortar joint, which is essential for...
356
Maximum Size of Aggregate01:12

Maximum Size of Aggregate

578
The maximum size of aggregate is defined as the aperture of the sieve retaining 15 percent or more of the particles present in the aggregate sample. The aggregate's maximum size impacts the concrete's water requirement, workability, and strength. Larger aggregates reduce the surface area needing cement paste coverage, which can lower water needs, thereby allowing a decrease in the water-to-cement ratio when the desired workability and richness of the mix are to be maintained, which can...
578

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Spontaneous facial expressivity predicts real-world social network size and richness.

iScience·2026
Same author

EVApeCognition: An 18-Year Dataset of Great Ape Cognition.

Scientific data·2026
Same author

Religious parents receive more alloparental aid in rural Bangladesh.

Evolutionary human sciences·2026
Same author

LLMs achieve adult human performance on higher-order theory of mind tasks.

Frontiers in human neuroscience·2026
Same author

Latent brain subtypes of chronotype reveal unique behavioral and health profiles across population cohorts.

Nature communications·2025
Same author

Low-certainty modals not future tenses cause increased psychological discounting in English relative to Dutch.

Cognition·2025

Related Experiment Video

Updated: Feb 15, 2026

Automatic Image Processing to Determine the Community Size Structure of Riverine Macroinvertebrates
08:56

Automatic Image Processing to Determine the Community Size Structure of Riverine Macroinvertebrates

Published on: January 13, 2023

2.9K

Optimising human community sizes.

Robin I M Dunbar1,2, Richard Sosis3

  • 1Department of Experimental Psychology, University of Oxford, Oxford, UK.

Evolution and Human Behavior : Official Journal of the Human Behavior and Evolution Society
|January 16, 2018
PubMed
Summary
This summary is machine-generated.

Community longevity is strongly linked to group size, with specific sizes like 50, 150, and 500 being most common and enduring. Religious ideology also enhances community cohesion and longevity, particularly in larger groups.

Keywords:
C19th utopian communitiesFractal layeringHutteritesKibbutzSmall scale societies

More Related Videos

Biology of Microbial Communities - Interview
14:42

Biology of Microbial Communities - Interview

Published on: May 28, 2007

9.1K
Microbial Communities in Nature and Laboratory - Interview
29:13

Microbial Communities in Nature and Laboratory - Interview

Published on: May 28, 2007

6.8K

Related Experiment Videos

Last Updated: Feb 15, 2026

Automatic Image Processing to Determine the Community Size Structure of Riverine Macroinvertebrates
08:56

Automatic Image Processing to Determine the Community Size Structure of Riverine Macroinvertebrates

Published on: January 13, 2023

2.9K
Biology of Microbial Communities - Interview
14:42

Biology of Microbial Communities - Interview

Published on: May 28, 2007

9.1K
Microbial Communities in Nature and Laboratory - Interview
29:13

Microbial Communities in Nature and Laboratory - Interview

Published on: May 28, 2007

6.8K

Area of Science:

  • Social Sciences
  • Anthropology
  • Sociology

Background:

  • Understanding factors influencing community longevity is crucial for social sustainability.
  • Historical and contemporary social structures often exhibit specific size regularities.

Purpose of the Study:

  • To investigate the relationship between community size and longevity in historical agricultural societies.
  • To explore the role of ideology in maintaining social cohesion and community persistence.

Main Methods:

  • Analysis of three historical, small-scale agricultural samples.
  • Comparative examination of community sizes and their corresponding longevity.
  • Assessment of the influence of religious versus secular ideologies on community cohesion.

Main Results:

  • Specific community sizes (50, 150, 500) were disproportionately common and exhibited greater longevity.
  • These common sizes align with natural groupings observed in hunter-gatherer societies and personal networks.
  • Religious ideology was found to foster greater cohesion and longevity in larger communities compared to secular ideology.

Conclusions:

  • Optimal community sizes appear to be culturally and historically recurrent, though the underlying reasons remain unclear.
  • Ideology plays a significant role in the social dynamics and long-term viability of communities.
  • Further research is needed to fully explain the social effectiveness of these specific community sizes.