Tootfinder

Ordinal regression for meta-analysis of test accuracy: a flexible approach for utilising all threshold data
Enzo Cerullo, Haley E. Jones, Tim Lucas, Nicola J. Cooper, Alex J. Sutton
https://arxiv.org/abs/2505.23393

Ordinal regression for meta-analysis of test accuracy: a flexible approach for utilising all threshold data
Standard methods for meta-analysis and network-meta-analysis of test accuracy do not fully utilise available evidence, as they analyse thresholds separately, resulting in a loss of data unless every study reports all thresholds - which rarely occurs. Furthermore, previously proposed "multiple threshold" models introduce different problems: making overly restrictive assumptions, or failing to provide summary sensitivity and specificity estimates across thresholds. To address this, we proposed …

This https://arxiv.org/abs/2409.08347 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_eco…

Sensitivity analysis of the perturbed utility stochastic traffic equilibrium
This paper develops a novel sensitivity analysis framework for the perturbed utility route choice (PURC) model and the accompanying stochastic traffic equilibrium model. We provide general results that determine the marginal change in link flows following a marginal change in link costs across the network in the cases of flow-independent and flow-dependent link costs. We derive analytical sensitivity expressions for the Jacobian of the individual optimal PURC flow and equilibrium link flows wit…

@… Nudge-nudge!
https://tapbots.social/@ivory/114581036568303599

This https://arxiv.org/abs/2501.08337 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Unsupervised neural-implicit laser absorption tomography for quantitative imaging of unsteady flames
This paper presents a novel neural-implicit approach to laser absorption tomography (LAT) with an experimental demonstration. A coordinate neural network is used to represent thermochemical state variables as continuous functions of space and time. Unlike most existing neural methods for LAT, which rely on prior simulations and supervised training, our approach is based solely on LAT measurements, utilizing a differentiable observation operator with line parameters provided in a standard spectr…

🚀 Kubernetes Meetup in Nuremberg! 🇩🇪
Join us on June 2nd for an evening of tech talks, networking, and community fun at the next CNCF Meetup!
🎤 Speakers:
🔹 Sarah Julia Kriesch – Docker vs Podman and the Universe
🔹 Philip Laine – Spegel: A Stateless OCI Registry Mirror
📍 Location: Coworking-Space Nürnberg
🕕 18:00: Doors open for networking
🕡 18:30: Talks begin
🔗 Sign up here:

This https://arxiv.org/abs/2309.15511 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qfi…

Measuring risk contagion in financial networks with CoVaR
The stability of a complex financial system may be assessed by measuring risk contagion between various financial institutions with relatively high exposure. We consider a financial network model using a bipartite graph of financial institutions (e.g., banks, investment companies, insurance firms) on one side and financial assets on the other. Following empirical evidence, returns from such risky assets are modeled by heavy-tailed distributions, whereas their joint dependence is characterized b…

Here's a poster of my institutional research, more information can be found at the following link (although the poster listed there has a typo with incorrect institutions): https://spacegrant.oregonstate.edu/posters/facing-pyrocene-amateur-radio-and-distributed-wireless-sensor-networks

I read "Then I Am Myself the World: What Consciousness Is and How to Expand It" by Christof Koch.
Interesting book which spends like 8 or 9 chapters detailing all the experiments which prove beyond much doubt that consciousness, and self awareness, is a thing done by a brain.
It describes how perception is a construction of a description, has a chapter called "computational mind"
And then spends the last two chapters describing why he thinks the mind can't be computed, because drugs have made him think experience is some kind of magic associated with highly interconnected causal structures.
Apparently, he thinks, once things become interconnected enough they become able to cause things independently of the physics running those connections.
Which is crazy, obviously. There's nothing causal in direct connections between neurons that isn't equally causal in modeled connections between virtual neurons.
All his evidence in the book from neural MRI scans to the effects of psychedelic drugs and symptoms of strokes and disease point to the brain simulating a virtual reality which is the basis of perception.
That simulated world in which we live is full of colour and shape and sounds and emotions and millions of mental constructs that are built to be correlated by the senses with the outside world, but are not equal to the world itself. We live in a dream constructed to correlate with reality.
But then instead of taking the next step: That consciousness itself is a property of a simulated being inside that mental model of the universe, a property which the brain simulates and applies to the virtual self that's doing the experiencing inside that model, he jumps towards some magic implying pan-psychism or that sufficiently interconnected networks become causally self-complete for some reason nobody can fathom.
Sure, colour and shape and emotions are all made up by the brain but experience can't be! For some reason.
You see in truth dualism is false, in that there is no spirit realm in which ghosts animate the matter of the body somehow.
Yet also, dualism is true, in that there is a simulated mental reality which we live in, computed by the brain in which all perception and experience are created, which is related-to but separate-from the unfolding complicated dance of energy that is the universe our bodies interact with.
People take some DMT trip, and the model of the universe emulated by their brain collapses and breaks. Their virtual simulated self inside their mind has these experiences of being one with the universe or the experience of feeling dead yet conscious or whatever, and these hippies think that the broken down simulated experience is real and reflects how consciousness is more fundamental than the atoms that make up the neurons in their brain.
Instead of realizing it shows them that their experienced universe is a simulacrum, they think they get a more direct experience of reality somehow. A consciousness more pure than any mere base atom.
"Then I am myself the world" is a great title. Everything you ever experience is created and simulated in your brain like a dream, the whole universe is inside your head. Even the fact of experience itself.
But that isn't the conclusion Koch reaches somehow, he just jumps from describing the evidence that this is so straight into ascribing super-causal magic consciousness to particular arrangements of atoms that integrated information theory suggest have high correlation, and thinks therefore conciousness is itself the entire universe.
Ah well, fun book. I like arguing in my head with authors that are wrong.
#reading #books #consciousness #thenIAmMyselfTheWorld

Bird of the Day — Prairie Falcon, Kansas 2021
#Birds #NaturePhotography #Nature #Wildlife