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Sökning: AMNE:(NATURAL SCIENCES Mathematics) > Annan publikation

  • Resultat 1-10 av 2234
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1.
  • Smolla, Marco, et al. (författare)
  • Underappreciated features of cultural evolution
  • 2024
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • Cultural evolution theory has long been inspired by evolutionary biology. Conceptual analogies between biological and cultural evolution have led to the adoption of a range of formal theoretical approaches from population dynamics and genetics. However, this has resulted in a research programme with a strong focus on cultural transmission. Here, we contrast biological with cultural evolution, and highlight aspects of cultural evolution that have not received sufficient attention previously. We outline possible implications for evolutionary dynamics and argue that not taking them into account will limit our understanding of cultural systems. We propose twelve key questions for future research, among which are calls to improve our understanding of the combinatorial properties of cultural innovation, and the role of development and life history in cultural dynamics. Finally, we discuss how this vibrant research field can make progress by embracing its multidisciplinary nature.
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  • Aas, Erik, et al. (författare)
  • Limiting directions for random walks in classical affine Weyl groups
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • Let be a finite Weyl group and the corresponding affine Weyl group. A random element of can be obtained as a reduced random walk on the alcoves of . By a theorem of Lam (Ann. Probab. 2015), such a walk almost surely approaches one of many directions. We compute these directions when is , and and the random walk is weighted by Kac and dual Kac labels. This settles Lam's questions for types and in the affirmative and for type in the negative. The main tool is a combinatorial two row model for a totally asymmetric simple exclusion process called the -TASEP, with four parameters. By specializing the parameters in different ways, we obtain TASEPs for each of the Weyl groups mentioned above. Computing certain correlations in these TASEPs gives the desired limiting directions.
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  • Jansson, Fredrik, et al. (författare)
  • Cultural Systems
  • 2024
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • Many cultural phenomena cannot be understood by studying traits in isolation. Instead, they are embedded in webs of relations, layered with rich social meaning, and sequentially acquired and evaluated, \emph{filtered}, in light of previously acquired traits. Incorporating multiple traits and their relations is needed to understand the organization, dynamics, and emergent products of cultural evolution. We argue that a systems approach offers the potential for: (i) a more thorough understanding of the source and character of emergent phenomena, crucial for understanding the origin and historical development of culture; (ii) an increased scope of cultural evolution, whereby faithful transmission, self-organization and filtering of culture can be accounted for by systems dynamics without the need for strong assumptions about innate machinery; and (iii) a more robust theoretical connection between cultural evolution and processes of development as they are studied in developmental psychology and related fields.
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  • Jansson, Fredrik, et al. (författare)
  • Modelling cultural systems and selective filters
  • 2024
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • A specific goal of the field of cultural evolution is to understand how processes of transmission and selection at the individual level lead to population-wide patterns of cultural diversity and change. Models of cultural evolution have typically assumed that traits are independent of one another and essentially exchangeable. But culture has a structure: traits bear relationships to one another that affect the transmission and selection process itself. Here we introduce a modelling framework to explore the effect of cultural structure on the process of learning. Through simulations, we find that introducing this simple structure changes the cultural dynamics. Based on a basic filtering mechanism for parsing these relationships, more elaborate cultural filters emerge. In a mostly incompatible cultural domain of traits, these filters organise culture into mostly (but not fully) consistent and stable systems. Incompatible domains produce small homogeneous cultures, while more compatibility increases size, diversity, and group divergence. When individuals copy based on a trait's features (here, its compatibility relationships) they produce more homogeneous cultures than when they copy based on the agent carrying the cultural trait. We discuss the implications of considering cultural systems and filters in the dynamics of cultural change.
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7.
  • Lindström, Torsten, 1965- (författare)
  • Investeringar blir till konsumption
  • 2012
  • Annan publikation (populärvet., debatt m.m.)abstract
    • Att lära sig räkna övningsexempel i matematikmed digitala hjälpmedel saknar bildningsvärde och gör kunskapen teknikberoende. Kunskapen föråldras på det här viset fort.
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  • van Bommel, Jorryt, 1974- (författare)
  • Att formulera problem 4-6
  • 2021
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • Att formulera problemuppgifter är en del av problemlösning, en del som dock skiljer sig från att lösa problemuppgifter. Denna text inriktas på hur undervisning med fokus på problemformulering kan utformas, varför det är viktigt att elever i samband med problemlösning ges möjlighet att formulera egna uppgifter samt vad eleverna då kan lära 
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  • Resultat 1-10 av 2234
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