**complexity**

Leverage Points: Places to Intervene in a System - The Donella Meadows Project

yesterday by ramses0

PLACES TO INTERVENE IN A SYSTEM

(in increasing order of effectiveness)

9. Constants, parameters, numbers (subsidies, taxes, standards).

8. Regulating negative feedback loops.

7. Driving positive feedback loops.

6. Material flows and nodes of material intersection.

5. Information flows.

4. The rules of the system (incentives, punishments, constraints).

3. The distribution of power over the rules of the system.

2. The goals of the system.

1. The mindset or paradigm out of which the system — its goals, power structure, rules, its culture — arises.

systems
complexity
process
reading
leverage
point
weakness
dimension
constant
measure
monitor
(in increasing order of effectiveness)

9. Constants, parameters, numbers (subsidies, taxes, standards).

8. Regulating negative feedback loops.

7. Driving positive feedback loops.

6. Material flows and nodes of material intersection.

5. Information flows.

4. The rules of the system (incentives, punishments, constraints).

3. The distribution of power over the rules of the system.

2. The goals of the system.

1. The mindset or paradigm out of which the system — its goals, power structure, rules, its culture — arises.

yesterday by ramses0

Noyze Lab Research

2 days ago by derishus

David Burraston is an award winning artist/scientist working in the areas of technology and electronic music since the late 1970s. His experimental arts practice encompasses field recording, landscape-scale sound art, chaos/complexity, sound synthesis and electronic music. He performs, lectures, conducts workshops and creates art installations in Regional NSW and around the world. David also designs and builds sound synthesizers based on his theories of chaos/complexity science.

science
noise
research
complexity
synthesizer
music
sound
soundart
workshops
art
installations
artist
technology
landscape
fieldrecording
2 days ago by derishus

boyter/scc: Sloc, Cloc and Code: scc is a very fast accurate code counter with complexity calculations and COCOMO estimates written in pure Go

golang
code
complexity
cloc
sloc
tokei

5 days ago by pinterb

Sloc, Cloc and Code: scc is a very fast accurate code counter with complexity calculations and COCOMO estimates written in pure Go

5 days ago by pinterb

Functional Bits: Lambda Calculus based Algorithmic Information Theory

6 days ago by euler

Abstract

In the first part we introduce binary representations of both lambda calculus and combinatory logic, together with very concise interpreters that witness their simplicity. Along the way we present a simple graphical notation for lambda calculus, a new empty list representation, improved bracket abstraction, and a new fixpoint combinator. In the second part we review Algorithmic Information Theory, for which these interpreters provide a convenient vehicle. We demonstrate this with several concrete upper bounds on program-size complexity.

cs
complexity
binary
lambda
calcullus
In the first part we introduce binary representations of both lambda calculus and combinatory logic, together with very concise interpreters that witness their simplicity. Along the way we present a simple graphical notation for lambda calculus, a new empty list representation, improved bracket abstraction, and a new fixpoint combinator. In the second part we review Algorithmic Information Theory, for which these interpreters provide a convenient vehicle. We demonstrate this with several concrete upper bounds on program-size complexity.

6 days ago by euler

Local causal states and discrete coherent structures (Rupe and Crutchfield, 2018)

7 days ago by cshalizi

"Coherent structures form spontaneously in nonlinear spatiotemporal systems and are found at all spatial scales in natural phenomena from laboratory hydrodynamic flows and chemical reactions to ocean, atmosphere, and planetary climate dynamics. Phenomenologically, they appear as key components that organize the macroscopic behaviors in such systems. Despite a century of effort, they have eluded rigorous analysis and empirical prediction, with progress being made only recently. As a step in this, we present a formal theory of coherent structures in fully discrete dynamical field theories. It builds on the notion of structure introduced by computational mechanics, generalizing it to a local spatiotemporal setting. The analysis’ main tool employs the local causal states, which are used to uncover a system’s hidden spatiotemporal symmetries and which identify coherent structures as spatially localized deviations from those symmetries. The approach is behavior-driven in the sense that it does not rely on directly analyzing spatiotemporal equations of motion, rather it considers only the spatiotemporal fields a system generates. As such, it offers an unsupervised approach to discover and describe coherent structures. We illustrate the approach by analyzing coherent structures generated by elementary cellular automata, comparing the results with an earlier, dynamic-invariant-set approach that decomposes fields into domains, particles, and particle interactions."

--- *ahem* *cough* https://arxiv.org/abs/nlin/0508001 *ahem*

to:NB
have_read
pattern_formation
complexity
prediction
stochastic_processes
spatio-temporal_statistics
cellular_automata
crutchfield.james_p.
modesty_forbids_further_comment
--- *ahem* *cough* https://arxiv.org/abs/nlin/0508001 *ahem*

7 days ago by cshalizi

Thibaut on Twitter: "There are three levels of knowing according to architect Matthew Frederick. Simplicity, the child's world view. Complexity, the adult's worldview. Informed simplicity, the enlightened view of reality.… https://t.co/05gpIwJzNW"

enlightened simple simplicity complexity thibaut kpaxs 2018-08-03

15 days ago by bekishore

enlightened simple simplicity complexity thibaut kpaxs 2018-08-03

15 days ago by bekishore

A Short Guide to Hard Problems | Quanta Magazine

15 days ago by gdw

What’s easy for a computer to do, and what’s almost impossible? Those questions form the core of computational complexity. We present a map of the landscape.

algorithms
complexity
programming
computation
15 days ago by gdw