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There are usually several blog articles in various states of progress that need feedback and are being actively discussed in the forum before being posted to the blog. You can find them here.
Main author: John Baez
Wiki page: Blog - Azimuth Project news
Forum discussion group: Blog - Azimuth Project news
Status: published.
Summary: What’s new on the Azimuth Project?
Main author: Curtis Faith
Wiki page: Blog - Curtis Faith on the Azimuth Project
Forum discussion group: Blog - Curtis Faith on the Azimuth Project
Status: published.
Summary: Curtis Faith introduces himself and talks about why he decided to help out on the Azimuth Project.
Main author: Curtis Faith
Wiki page: Blog - making decisions under uncertainty
Status: published.
Forum discussion group: Blog - making decisions under uncertainty
Summary: Groups often want to make the right decisions. So they spend a lot of time in the decision process itself. A better approach is to acknowledge when perfect decisions don’t exist and to incorporate the uncertainty itself into your plans.
Main author: John Baez
Wiki page: Blog - week 309
Forum discussion group: This Week’s Finds - Week 309
Status: published.
Summary: Another application of Hopf bifurcations with noise, this time to predator-prey systems.
Main author: John Baez
Wiki page: Blog - network theory (part 1)
Forum discussion group: Blog - network theory (part 1)
Status: published.
Summary: Networks, and diagrams of networks, show up in many branches of science. It would be nice to find a unified framework for these ideas.
Main author: John Baez
Wiki page: Blog - network theory (part 2)
Forum discussion group: Blog - network theory (part 2)
Status: published.
Summary: One can adapt ideas from quantum field theory to describe the theory of stochastic Petri nets. The master equation versus the rate equation.
Main author: John Baez
Wiki page: Blog - network theory (part 3)
Forum discussion group: Blog - network theory (part 3)
Status: published.
Summary: The rate equation of a stochastic Petri net, and applications to chemistry and infectious disease.
Main author: John Baez
Wiki page: Blog - network theory (part 4)
Forum discussion group: Blog - network theory (part 4)
Status: published.
Summary: The master equation of a stochastic Petri net, and analogies to quantum field theory.
Main author: John Baez
Wiki page: Blog - network theory (part 5)
Forum discussion group: Blog - network theory (part 5)
Status: published.
Summary: Analogies between quantum theory and probability theory.
Main author: John Baez
Wiki page: Blog - network theory (part 6)
Forum discussion group: Blog - network theory (part 6)
Status: published.
Summary: Writing the master equation using annihilation and creation operators.
Main author: Jacob Biamonte
Wiki page: Blog - network theory (part 7)
Forum discussion group: Blog - network theory (part 7)
Status: published.
Summary: An example: the stochastic version of the logistic equation in terms of annihilation and creation operators, and how to obtain an equilibrium Poisson distribution.
Main author: John Baez
Wiki page: Blog - network theory (part 8)
Forum discussion group: Blog - network theory (part 8)
Status: published.
Summary: A review of our work so far: how to get the rate equation and the master equation from a stochastic Petri net. A bit about Feynman diagrams.
Main author: Brendan Fong and John Baez
Wiki page: Blog - network theory (part 9)
Forum discussion group: Blog - network theory (part 9)
Status: published.
Summary: A quantum field theory proof of the most exciting theorem in D. F. Anderson, G. Craciun and T. G. Kurtz’s paper Product-form stationary distributions for deficiency zero chemical reaction networks.
Main author: John Baez
Wiki page: Blog - network theory (part 10)
Forum discussion group: Blog - network theory (part 10)
Status: published.
Summary: An example of a simple reversible reaction.
Main author: Brendan Fong and John Baez
Wiki page: Blog - network theory (part 11)
Forum discussion group: Blog - network theory (part 11)
Status: published
Summary: Brendan Fong proves a version of Noether’s theorem for Markov processes.
Main author: John Baez
Wiki page: Blog - network theory (part 12)
Forum discussion group: Blog - network theory (part 12)
Status: published
Summary: A comparison of quantum mechanics and stochastic mechanics.
Main author: John Baez
Wiki page: Blog - network theory (part 13)
Forum discussion group: Blog - network theory (part 13)
Status: published
Summary: A comparison of the quantum and stochastic versions of Noether’s theorem.
Main author: John Baez
Wiki page: Blog - network theory (part 14)
Forum discussion group: Blog - network theory (part 14)
Status: published
Summary: An example of a Markov process or quantum Hamiltonian: the Desargues graph and its role in chemistry.
Main author: John Baez
Wiki page: Blog - network theory (part 15)
Forum discussion group: Blog - network theory (part 15)
Status: draft
An example of a Markov process or quantum Hamiltonian: the Desargues graph, its role in chemistry, and its relation to the SU(5) grand unified theory of particle physics.
Main author: John Baez
Wiki page: Blog - stabilization wedges (part 5)
Forum discussion group: Blog - stabilization wedges (part 5)
Status: published.
Summary: Pacala’s 2008 followup on the original Pacala-Socolow Stabilization wedges paper.
Main author: Tim van Beek
Wiki page: Blog - your model is verified, but not valid! Huh?
Forum discussion group: Blog - your model is verified, but not valid! Huh?
Status: published.
Summary: Critics of climate science in general, and sceptics of the statement that anthropogenic (man-made) global warming is real, often claim that climate models are wrong and cannot be trusted. But what does “wrong” mean here and what can and should be done to make models more trustworthy, from a software engineering viewpoint? In a first step, we’ll introduce some relevant technobabble.
Main author: John Baez
Wiki page: Blog - week 314
Forum discussion group: Blog - week 314
Status: published.
Summary: The first part of an interview with Thomas Fischbacher.
Main author: Tim van Beek
Wiki page: Blog - putting the Earth in a box
Forum discussion group: Blog - putting the Earth in a box
Status: published.
Summary: An introduction to energy balance models.
Main author: Tim van Beek
Wiki page: Blog - a quantum of warmth
Status: published.
Forum discussion group: Blog - a quantum of warmth
Summary: A closer look at the heat balance of the Earth and its atmosphere. An explanation of downward longwave radiation (DLR), generated by the atmosphere of the earth and why it does not violate the second law of thermodynamics.
Main author: John Baez
Wiki page: Blog - week 317
Forum discussion group: Blog - week 317
Status: published
Summary: A sketchy introduction to glacial cycles and Milankovich cycles.
Main author: John Baez
Wiki page: Blog - week 318
Forum discussion group: Blog - week318
Status: published
Summary: A bit more detail on Milankovitch cycles.
Main author: Tim van Beek
Wiki page: Blog - eddy who?
Forum discussion group: Blog - eddy who?
Status: First draft finished, feedback welcome.
Summary: A short introduction to turbulence: It is all about eddies.
Main author: Cameron Smith
Wiki page: Blog - hierarchical organization and biological evolution (part 1)
Forum discussion group: Blog - hierarchical organization and biological evolution (part 1)
Status: published.
Summary: An introduction to hierarchical systems, which asks why evolution favors the development of such systems. See also the old Wiki page: [[Blog - evolution and categories]. This is part of a larger attempt to review some of the literature on major transitions in evolution and multi-level selection, sketch a few connections to concepts in category theory, and discuss the potential for using experimental evolution to investigate and strengthen those connections.
Main author: Cameron Smith
Wiki page: Blog - hierarchical organization and biological evolution (part 2)
Forum discussion group: Blog - hierarchical organization and biological evolution (part 2)
Status: in progress.
Summary: An attempt to review some of the literature on major transitions in evolution and multi-level selection, sketch a few connections to concepts in category theory, and discuss the potential for using experimental evolution to investigate and strengthen those connections.
Main author: Cameron Smith
Wiki page: Blog - hierarchical organization and biological evolution (part 3)
Forum discussion group: Blog - hierarchical organization and biological evolution (part 3)
Status: in progress.
Summary: An attempt to review some of the literature on major transitions in evolution and multi-level selection, sketch a few connections to concepts in category theory, and discuss the potential for using experimental evolution to investigate and strengthen those connections.
Main author: David Tweed
Wiki page: Blog - Worried about the environment You're seeing things
Status: text, a few supporting links.
Summary: Thoughts about the disproportionate impact of pictures on human psychology.
Main author: Tim van Beek
Wiki page: Blog - the color of night
Forum discussion group: Blog - The color of night
Status: stub.
Summary: How big is the effect of downward longwave radiation (DLR) really? What do measurements say? What instruments are used? Are there alternative explanations of the 33 Kelvin gap of the zero dimensional energy balance model?
Main author: Tim van Beek
Wiki page: Blog - increasing the signal-to-noise ratio with more noise
Status: stub.
Summary: Ice Ages, the Milankovich cycles and how they may be connected by the phenomenon of stochastic resonance.
Main author: Jacob Biamonte
Wiki page: Blog - network theory (Biamonte guest posts)
Forum discussion group: Blog - network theory (Biamonte guest posts)
Status: work in progress.
Summary: Jacob Biamonte on stochastic Petri nets and chemical reaction networks: material that might go into posts on the Azimuth blog.
Main author: Brendan Fong
Wiki page: Blog - network theory (Fong guest posts)
Forum discussion group: Blog - network theory (guest posts)
Status: work in progress.
Summary: Brendan Fong on stochastic Petri nets and chemical reaction networks: material that might go into posts on the Azimuth blog.
Main author: John Baez
Wiki page: Blog - interview with Didier Paillard
Forum discussion group: Blog - interview with Didier Paillard
Status: work in progress.
Summary: John Baez interviewing Didier Paillard about his work on the glacial cycles.
Main author: Blake Stacey
Forum discussion group: Invasion fitness in moment-closure treatments
Status: work in progress.
Summary: Moment closures are a way of forgetting information about a system in a controlled fashion, in the hope that an incomplete, fairly heavily “coarse-grained” picture of the system will still be useful in figuring out what will happen to it. Sometimes, this is a justifiable hope, but in other cases, we are right to wonder whether all the algebra it generates actually leads us to any insights. Here, we’ll be concerned with a particular application of this technology: studying the vulnerability of an ecosystem to invasion. We shall find expressions for invasion fitness, the expected relative growth rate of an initially-rare species or variety.