Construct · 2 fields · 4 citations

Where does generation collide?

One name. Different field. Different construct. One map.

● jingle · one word, two constructs Nearest construct by meaningcohortcompare the meanings
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Every construct on the map is compared with every other by the meaning of its definitions, and the closest one is surfaced here. The nearest construct to generation is cohort.

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generation2 CONSTRUCTSSocial generationRYDER · BIRTH COHORTGC generationUNGAR · OBJECT AGE

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1928Social generation1983GC generation
2026

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Sociology and demography

people born and coming of age at about the same time, marked by shared historical experience.

A group of people born and coming of age at about the same time, treated as a unit because shared historical experience during their formative years leaves a lasting common stamp on their outlook. Mannheim's 1928 essay The Problem of Generations argued that a generation is a social location, not merely an age, and Ryder's 1965 The Cohort as a Concept in the Study of Social Change formalised the birth cohort as the demographic unit that carries such change through a population. The referent is a cohort of humans defined by their time of birth and their shared history, and it is not a parent-to-offspring step in breeding, the output of a power plant, or a batch of objects in a computer's memory.[1][2]

Unit
A cohort of people born in a shared span of years
Recovery means
Not applicable
Measured by
Delimited by birth years and studied through cohort analysis of surveys, censuses, and vital records

Computer science

a group of allocated objects sorted by how long they have survived, so a garbage collector scans the youngest often.

In automatic memory management, a group into which allocated objects are sorted by how long they have survived, so that a garbage collector can scan the youngest group often and the older ones rarely, exploiting the fact that most objects die young. Lieberman and Hewitt's 1983 A real-time garbage collector based on the lifetimes of objects proposed grouping by lifetime, and Ungar's 1984 Generation Scavenging named these age groups generations and built a collector around them. The referent is an age band of data objects inside a running program, promoted from young to old as it survives, and it bears no relation to a cohort of people, a breeding cross, or a power station's output.[3][4]

Unit
An age band of allocated objects, from youngest to oldest
Recovery means
Older generations are collected less often; survivors are promoted to the next generation up
Measured by
Instrumented by survival rate, promotion counts, and per-generation collection time in a runtime

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Nearby collisions

allele3 fields · 5 citationsjingle · one word, three constructspower6 fields · 13 citationsjingle · one name, six constructscohort3 fields · 3 citationsjingle · one word, three constructs

References

  1. Mannheim, K. (1952). The problem of generations. In P. Kecskemeti (Ed.), Essays on the sociology of knowledge (pp. 276–322). Routledge & Kegan Paul. (Original work published 1928)
  2. Ryder, N. B. (1965). The cohort as a concept in the study of social change. American Sociological Review, 30(6), 843–861. https://doi.org/10.2307/2090964
  3. Ungar, D. (1984). Generation scavenging: A non-disruptive high performance storage reclamation algorithm. In Proceedings of the First ACM SIGSOFT/SIGPLAN Software Engineering Symposium on Practical Software Development Environments (pp. 157–167). ACM. https://doi.org/10.1145/800020.808261
  4. Lieberman, H., & Hewitt, C. (1983). A real-time garbage collector based on the lifetimes of objects. Communications of the ACM, 26(6), 419–429. https://doi.org/10.1145/358141.358147

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