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from Mail Online

Trapped in a bubble! Scientists shed light on the Earth's galactic neighbourhood

Complex: The Sun is seen as central to our solar system, but even that is on its own journey through the 'Local Bubble'


Bernard Ryefield's Complexity PearlTree

Ecosystems, for instance, economic entities, developing embryos,, and the brain -- each is an example of complex dynamics that defy mathematical analysis or simulation.

from Moz

SEO Split-Testing: How to A/B Test Changes for Google

Google is increasingly relying on machine learning and artificial intelligence, making ranking factors harder to understand, less predictable, and less uniform across keywords. It's becoming such a complex system, that we often can't really know how a change will affect our own site until we roll it out. In this environment, we'll need to use split-testing more and more.


What is System Dynamics « System Dynamics Society // Feedback Thinking Conceptually, the feedback concept is at the heart of the system dynamics approach. Diagrams of loops of information feedback and circular causality are tools for conceptualizing the structure of a complex system and for communicating model-based insights. Loop Dominance and Nonlinearity The loop concept underlying feedback and circular causality by itself is not enough, however. The explanatory power and....

Playhouse with platform and slide (PC120221) - tree house, playhouses outdoor, garden playhouse, children's play house, outdoor wendy house, wooden playhouse


Bottom of Gaping Gill, Yorkshire. Britain's highest unbroken waterfall plunges 328 ft into Gaping Gill, one of Britain's largest and most complex cave systems.