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Visualization of variable interrelationships
A causal loop diagram (CLD) is a causal diagram that visualizes how different variables in a system are causally interrelated. The diagram consists of
Causal_loop_diagram
Study of non-linear complex systems
system or mechanical system) may be represented as a causal loop diagram. A causal loop diagram is a simple map of a system with all its constituent components
System_dynamics
System dynamics archetype
The causal loop diagram in Figure 1 shows the pattern dynamics of the system. The pattern of behaviour begins with the outer reinforcing loop R1 where
Accidental_Adversaries
Process where information about current status is used to influence future status
and causal loop diagrams". Modeling the Environment. Island Press. pp. 99 ff. ISBN 978-1-61091-425-3. This chapter describes causal loop diagrams to portray
Feedback
How one process influences another
usually expressed in the form of missing arrows in causal graphs such as Bayesian networks or path diagrams. The theory underlying these derivations relies
Causality
Conceptual model in philosophy of science
nodes following causal arrows. Causal diagrams include causal loop diagrams, directed acyclic graphs, and Ishikawa diagrams. Causal diagrams are independent
Causal_model
Notation to express cause and effect
graphs, causal loop diagrams, why-because graphs (WBGs), and diagrams visualizing linear as well as nonlinear causal processes in both Venn diagram and lines-surfaces
Causal_notation
Loop that increases an initial effect
further change in the same direction. A simple feedback loop is shown in the diagram. If the loop gain AB is positive, then a condition of positive or regenerative
Positive_feedback
Overuse of a shared resource
The Tragedy of the Commons archetype can be illustrated using a causal loop diagram. Like Lloyd and Thomas Malthus before him, Hardin was primarily interested
Tragedy_of_the_commons
Topics referred to by the same term
video game features Causal-final case, a grammatical case in Hungarian and Chuvash Causal loop diagram, infographics concept Causal Markov condition, in
Causality_(disambiguation)
Mental representation of the external world
typically used: Causal loop diagrams – displaying tendency and a direction of information connections and the resulting causality and feedback loops System structure
Mental_model
models are created in a traditional way with stock and flow diagrams and causal loop diagrams. Simulation results and the model structure can be analyzed
Simantics_System_Dynamics
This is a list of causal mapping software. Causal mapping software enables users to create and/or work with causal maps: qualitative networks of interconnected
List of causal mapping software
List_of_causal_mapping_software
Discussion of scenarios for a collapse of civilization due to climate change
Conceptual causal loop diagram of cascading global climate failure used in the "Climate endgame" paper
Climate change and civilizational collapse
Climate_change_and_civilizational_collapse
system can be described using causal loop diagrams which may consist of balancing and reinforcing loops. Balancing loop is a structure representing negative
Escalation_archetype
Probabilistic graphical representation of causal relationships
Mathematics portal Bayesian epistemology Bayesian programming Causal inference Causal loop diagram Chow–Liu tree Computational intelligence Computational phylogenetics
Bayesian_network
City in Thailand
perceptions of Chiang Mai city's transport problems an application of Causal Loop Diagram (CLD) methodology". Transportation Research Procedia. World Conference
Chiang_Mai
Self-reinforcing sequence of events
one cannot avoid a problem because of contradictory constraints Causal loop diagram – Visualization of variable interrelationships Chain reaction – Self-amplifying
Vicious_circle
Function in quantum field theory showing probability amplitudes of moving particles
respective diagram. Propagators may also be viewed as the inverse of the wave operator appropriate to the particle, and are, therefore, often called (causal) Green's
Propagator
Subfield of machine learning
decision model represent cause-and-effect (as in a causal loop diagram), data flow (as in a data flow diagram), or other relationships. As an example, one link
Decision_intelligence
Topics referred to by the same term
McClellan–Palomar Airport in CarLsbaD, California (IATA Code: CLD) Causal loop diagram for modeling dynamic systems The Center for Life Detection, a NASA-supported
CLD
Argumentation scheme
opposed to an ideal conceptual structure such as, for example, a causal loop diagram, flowchart, or structure chart. Issue mapping is the basis of a meeting
Issue-based information system
Issue-based_information_system
Simulation software developed by Ventana Systems
provides a graphical modeling interface with stock and flow and causal loop diagrams, on top of a text-based system of equations in a declarative programming
Vensim
Approach to quantum gravity using discrete spacetime
The causal sets program is an approach to quantum gravity. Its founding principles are that spacetime is fundamentally discrete (a collection of discrete
Causal_sets
Statistical term
variable and back is counted once only. Bayesian network Causality Causal loop diagram Hidden Markov model Latent variable model Path coefficient Structural
Path_analysis_(statistics)
System archetype
the problem symptoms. The delay of the reinforcing loop makes it difficult to recognize the causal relation between the fix applied to the symptoms and
Fixes_that_fail
Systems dynamics archetype
system is made up of a reinforcing loop and at least two balancing loops. See causal loop diagram and stock and flow diagram for the insight into model fundamentals
Attractiveness_principle
Directed graph with no directed cycles
undirected edges. Another type of graph with a similar causal structure is an influence diagram, the vertices of which represent either decisions to be
Directed_acyclic_graph
System archetype
of three feedback loops. Each feedback loop can be one of two types: Reinforcing loop A reinforcing loop is a type of a feedback loop, where a positive
Growth_and_underinvestment
Study of circular causal processes
Cybernetics is the transdisciplinary study of circular causal processes such as feedback and recursion, where the outcomes of actions return as inputs
Cybernetics
variables created in a traditional way with stock and flow diagrams and causal loop diagrams. SimPy - an open-source discrete-event simulation package
List of computer simulation software
List_of_computer_simulation_software
World line of a particle in spacetime which returns to its starting point
event horizons excised would still be causally well behaved and an observer might not be able to detect the causal violation. When discussing the evolution
Closed_timelike_curve
Type of cognitive map
collaborative decision-making, and natural resource planning. Causal diagram Causal loop diagram System dynamics Cognitive map Bart Kosko (1986). "Fuzzy Cognitive
Fuzzy_cognitive_map
Theory of quantum gravity merging quantum mechanics and general relativity
theory that lead to ultraviolet divergence beyond 2-loops (see one-loop Feynman diagram in Feynman diagram). While there has been a proposal relating to observation
Loop_quantum_gravity
Branch of engineering and mathematics
Extensive use is usually made of a diagrammatic style known as the block diagram. In it the transfer function, also known as the system function or network
Control_theory
climate change on health, since we could not quantify several important causal pathways". Climate change was responsible for 3% of diarrhoea, 3% of malaria
Effects of climate change on human health
Effects_of_climate_change_on_human_health
Mathematically rigorous approach to renormalization theory
abounded. The divergences appeared in calculations involving Feynman diagrams with closed loops of virtual particles. It is an important observation that in perturbative
Causal_perturbation_theory
Topological structure in loop quantum gravity
aspects of a spatial geometry. A spin network is defined as a diagram like the Feynman diagram which makes a basis of connections between the elements of
Spin_foam
Method in physics used to deal with infinities
effects of their self-interactions. Even if no infinities arose in loop diagrams in quantum field theory, it can be shown that it is necessary to renormalize
Renormalization
Description of gravity using discrete values
gravity Euclidean quantum gravity Integral method Causal dynamical triangulation Causal fermion systems Causal Set Theory Covariant Feynman path integral approach
Quantum_gravity
Control concept
figure shows a simplified block diagram of a negative feedback amplifier. The feedback sets the overall (closed-loop) amplifier gain at a value: O I =
Negative_feedback
System that manages the behavior of other systems
automation Coefficient diagram method Control theory – Branch of engineering and mathematics Cybernetics – Study of circular causal processes Distributed
Control_system
Hypothetical physical concept
research on loop quantum gravity may eventually play a fundamental role in a theory of everything, but that is not its primary aim. Loop quantum gravity
Theory_of_everything
Random change in the energy inside a volume
Feynman diagrams, quantum fluctuations enter at the level of loop diagrams. In quantum electrodynamics, for example, the electron self energy diagram (to
Quantum_fluctuation
Flow graph invented by Claude Shannon
referred to as the "current loop" or "torque loop". Loop 3 effectively diminishes the effects of loop 1 and loop 2. Loop 4 is extrinsic. A tachometer
Signal-flow_graph
Form of causal modeling that fit networks of constructs to data
postulated structuring can also be presented using diagrams containing arrows as in Figures 1 and 2. The causal structures imply that specific patterns should
Structural_equation_modeling
Region in spacetime from which nothing can escape
example, this occurs with a uniformly accelerated particle. A spacetime diagram of this situation is shown in the figure to the right. As the particle
Event_horizon
Investment strategy
reinforcing loop, greater investor returns and increased movement towards sustainability are generated with every cycle. Causal loop diagram illustrating
Strategic sustainable investing
Strategic_sustainable_investing
understand the causal path between the action and negative ramifications so that the negative effect can be "trimmed." Positive reinforcement loop (PRL) - Desired
Thinking processes (theory of constraints)
Thinking_processes_(theory_of_constraints)
Interdisciplinary design field concerned with systems
systems thinking and design practice: Systems analysis and mapping: Causal loop diagrams Stakeholder mapping Gigamapping and rich pictures System dynamics
Systemic_design
Candidate unified theory of physics
The theory of causal fermion systems is an approach to describe fundamental physics. It provides a unification of the weak, the strong and the electromagnetic
Causal_fermion_systems
Violation of charge-parity symmetry in particle physics and cosmology
Neutral particle oscillation Parity (physics) § Parity violation Penguin diagram T-symmetry Aaij, R.; Abdelmotteleb, A.S.W.; Beteta, C.A.; Abudinén, F.;
CP_violation
Description of gauge theories using loop operators
Wilson loops and holonomies. The loop representation is a quantum hamiltonian representation of gauge theories in terms of loops. The aim of the loop representation
Loop representation in gauge theories and quantum gravity
Loop_representation_in_gauge_theories_and_quantum_gravity
Theory of gravitation as curved spacetime
information about the spacetime's causal structure. This structure can be displayed using Penrose–Carter diagrams in which infinitely large regions of
General_relativity
Unified field theory
but has its own dynamical field, the radion. In the above, the size of the loop Λ {\displaystyle \Lambda } acts as a coupling constant between the gravitational
Kaluza–Klein_theory
Rail accident in Powys, Wales
900 m (1⁄2 mile) west of the passing loop at Talerddig, Powys. The trains had been scheduled to pass at the loop, but the first train failed to stop.
2024 Talerddig train collision
2024_Talerddig_train_collision
Unsolved problem in physics
mass renormalization between fermionic top quark loop and scalar stop squark tadpole Feynman diagrams in a supersymmetric extension of the Standard Model
Hierarchy_problem
Attempt to find a consistent theory of quantum gravity
freedom Causal dynamical triangulation Causal sets Critical phenomena Euclidean quantum gravity Fractal cosmology Functional renormalization group Loop quantum
Asymptotic_safety
Reference model for military vehicles
actuators and sensors. The figure for example shows a high level block diagram of a 4D/RCS reference model architecture for a notional Future Combat System
4D-RCS Reference Model Architecture
4D-RCS_Reference_Model_Architecture
Attempts to develop a quantum mechanical theory of cosmology
approach is attempted for instance with loop quantum cosmology, loop quantum gravity, string theory and causal set theory. In quantum cosmology, the universe
Quantum_cosmology
Hypothesis proposing a modification of Newton's laws
1139/cjp-2014-0168. ISSN 0008-4204. Hernandez, X. (2012). "A Phase Space Diagram for Gravity". Entropy. 14 (12): 848. arXiv:1203.4248. Bibcode:2012Entrp
Modified_Newtonian_dynamics
Path of an object through spacetime
Closed timelike curves Causal structure, curves that represent a variety of different types of world line Isotropic line Feynman diagram Time geography Harvey
World_line
Phenomenon in which a neutrino changes lepton flavor as it travels
and other modifications that are less similar (e.g., neutrino masses from loop effects and/or from suppressed couplings). One example of the last type of
Neutrino_oscillation
Classical statement of gravity as force
Wheeler–DeWitt equation Loop quantum gravity Spin foam Causal dynamical triangulation Asymptotic safety in quantum gravity Causal sets DGP model Rainbow
Newton's law of universal gravitation
Newton's_law_of_universal_gravitation
2004 film by Shane Carruth
reduction of objects' weight, the two men accidentally discover an 'A-to-B' causal loop side-effect: objects left in the weight-reducing field exhibit temporal
Primer_(film)
Software for working with quantitative decision models
of variables with cyclic dependencies, such as feedback loops. It expands the influence diagram notation, which does not normally allow cycles. At least
Analytica_(software)
Attraction of masses and energy
Wheeler–DeWitt equation Loop quantum gravity Spin foam Causal dynamical triangulation Asymptotic safety in quantum gravity Causal sets DGP model Rainbow
Gravity
1979 nuclear accident in Pennsylvania
cancer, while other studies did not. Due to the nature of such studies, a causal connection linking the accident with cancer is difficult to prove. Cleanup
Three_Mile_Island_accident
Study of cooperation of brain regions to process information
methods for the statistical analysis of interdependence, such as dynamic causal modelling and statistical linear parametric mapping. These datasets are
Functional integration (neurobiology)
Functional_integration_(neurobiology)
Analogies between Maxwell's and Einstein's field equations
Wheeler–DeWitt equation Loop quantum gravity Spin foam Causal dynamical triangulation Asymptotic safety in quantum gravity Causal sets DGP model Rainbow
Gravitoelectromagnetism
Modern theory of gravitation that combines supersymmetry and general relativity
Quantum geometry Loop quantum gravity Quantum cosmology Loop quantum cosmology Causal dynamical triangulation Causal fermion systems Causal sets Canonical
Supergravity
Hypothetical model through which W and Z bosons acquire mass
Catterall; Joel Giedt; Francesco Sannino & Joe Schneible (2008). "Phase diagram of SU(2) with 2 flavors of dynamical adjoint quarks". Journal of High Energy
Technicolor_(physics)
Graphical representation of energy flows in physical systems
graph itself using the causal stroke notation. A causal bond graph can be put into state-space form if: every bond has a causal stroke and every component
Bond_graph
Method in electronic engineering
y_{11}R_{L}y_{22}}}\,} Digital filters are often diagramed as signal flow graphs. There are two loops L 1 = − a 1 Z − 1 {\displaystyle L_{1}=-a_{1}Z^{-1}\
Mason's_gain_formula
Hypothetical elementary particle that mediates gravity
Feynman diagrams and semiclassical corrections such as one-loop diagrams behave normally. However, Feynman diagrams with at least two loops lead to ultraviolet
Graviton
Condition in which spacetime itself breaks down
singularity is, however, covered by an event horizon, so it is never in the causal past of any outside observer, and at no time can it be objectively said
Gravitational_singularity
Algorithm for modelling sequential data
modules, called "causal masking": M causal = [ 0 − ∞ − ∞ … − ∞ 0 0 − ∞ … − ∞ 0 0 0 … − ∞ ⋮ ⋮ ⋮ ⋱ ⋮ 0 0 0 … 0 ] {\displaystyle M_{\text{causal}}={\begin{bmatrix}0&-\infty
Transformer_(deep_learning)
Proposed theory of gravitation
Wheeler–DeWitt equation Loop quantum gravity Spin foam Causal dynamical triangulation Asymptotic safety in quantum gravity Causal sets DGP model Rainbow
Brans–Dicke_theory
Combination of electronics and mechanics
theory – Branch of engineering and mathematics Cybernetics – Study of circular causal processes Ecomechatronics – Mechatronical technology reducing the ecological
Mechatronics
Mathematical technique in physics
the most fundamental level and so time-symmetric systems can be viewed as causal or retrocausal.[page needed] Philosophical considerations of time travel
Retrocausality
Wheeler–DeWitt equation Loop quantum gravity Spin foam Causal dynamical triangulation Asymptotic safety in quantum gravity Causal sets DGP model Rainbow
Lovelock_theory_of_gravity
Locality condition in quantum field theory
single momentum delta function. In any connected diagram with V vertices, I internal lines and L loops, I-L of the delta functions go into fixing internal
Cluster_decomposition
Theoretical framework in physics
itself can be found using the Feynman diagram method. Feynman diagrams devoid of "loops" are called tree-level diagrams, which describe the lowest-order interaction
Quantum_field_theory
Speculative mechanism for achieving faster-than-light travel
eventually destroying the second Krasnikov tube as it approaches the timelike loop limit, in which causality is violated.[who?] Wormhole Time travel Wheeler–Feynman
Krasnikov_tube
Symmetry between bosons and fermions
relatively large for the model and can only be achieved with large radiative loop corrections from top squarks, which many theorists consider to be "unnatural"
Supersymmetry
Tensor field in Riemannian geometry
maintained in the same orientation, parallel to its previous positions. Once the loop is complete the tennis racket will be parallel to its initial starting position
Riemann_curvature_tensor
Mathematical set with an ordering
partial order has self-loops at every node and therefore is not a DAG; when a non-strict order is said to be depicted by a Hasse diagram, actually the corresponding
Partially_ordered_set
Linear perturbations to solutions of nonlinear Einstein field equations
Wheeler–DeWitt equation Loop quantum gravity Spin foam Causal dynamical triangulation Asymptotic safety in quantum gravity Causal sets DGP model Rainbow
Linearized_gravity
Interpretation of quantum mechanics
theory, also known as the pilot wave theory, Bohmian mechanics, and the causal interpretation, is an interpretation of quantum mechanics that postulates
De_Broglie–Bohm_theory
Hypothetical faster-than-light particle
actually create the same tachyon and send it forward in time (which is causal). However, this principle is not universally accepted as resolving the paradoxes
Tachyon
Fringe theory of physics
attracted attention. Lisi made a further presentation for the International Loop Quantum Gravity Seminar on November 13, 2007, and responded to press inquiries
An Exceptionally Simple Theory of Everything
An_Exceptionally_Simple_Theory_of_Everything
Simplified representations of communication
components and their interactions are usually presented in the form of a diagram. Some basic components and interactions reappear in many of the models
Models_of_communication
visualize causal relationships and identify heavily-weighted or important contributors to the probability of the critical event. Bow-tie diagrams, cause-and-effect
Network theory in risk assessment
Network_theory_in_risk_assessment
sales clearly change over time, there must be something further back up the causal chain that makes this happen. One such item is ‘customers’ – if the firm
Strategy_dynamics
measure. 2. One of many hypothetical parallel universes which exist as causally disconnected constituent parts of a larger multiverse, which itself comprises
Glossary_of_astronomy
Solution of Einstein field equations
remain at constant values of x, y, and z. Their density in this coordinate diagram increases with x, but their density in their own frames of reference is
Gödel_metric
Overview of and topical guide to thought
Choice – Deciding between multiple options Cybernetics – Study of circular causal processes Decision theory – Branch of applied probability theory Executive
Outline_of_thought
Simplest supersymmetric extension to the Standard Model
Georgi–Glashow SU(5) . The condition for gauge coupling unification at one loop is whether the following expression is satisfied α 3 − 1 − α 2 − 1 α 2 −
Minimal Supersymmetric Standard Model
Minimal_Supersymmetric_Standard_Model
sickness experimentally and, more recently, to test sensory conflict theory's causal predictions directly. In a 2025 study, Aaron R. Allred, Aadhit R. Gopinath
Sensory_conflict_theory
Class of electric multiple unit train
incompatibility between Class 508 (and 507) EMUs and the Liverpool Loop track as a causal factor, along with maintenance and other track design concerns.
British_Rail_Class_508
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