Tootfinder

Stumbled across my old NeXT "floptical" disc while looking through old boxes at the office! I've been wondering where this had gone for a few decades now: I have archives of most of my files from 1992 (when we founded Omni) through the present, but this was where I had archived my active files for several of the years prior.
Now to see if any of our NeXT cubes still has a working magneto-optical drive that can read this data…

Multi-objective Portfolio Optimization Via Gradient Descent
Christian Oliva, Pedro R. Ventura, Luis F. Lago-Fern\'andez
https://arxiv.org/abs/2507.16717 https://

Multi-objective Portfolio Optimization Via Gradient Descent
Traditional approaches to portfolio optimization, often rooted in Modern Portfolio Theory and solved via quadratic programming or evolutionary algorithms, struggle with scalability or flexibility, especially in scenarios involving complex constraints, large datasets and/or multiple conflicting objectives. To address these challenges, we introduce a benchmark framework for multi-objective portfolio optimization (MPO) using gradient descent with automatic differentiation. Our method supports any …

#kde kmymoney also started to eat data. If Devs turn something from reliable and safe to unreliable and unsafe, the real question of liability comes into play. How can such a thing end in distribution?
Maybe we need to re-organize open source to have a reliable portfolio of applications, a kind of reliable #kde fr…

The impact of economic policies on housing prices. Approximations and predictions in the UK, the US, France, and Switzerland from the 1980s to today
Nicolas Houli\'e
https://arxiv.org/abs/2505.09620

The impact of economic policies on housing prices. Approximations and predictions in the UK, the US, France, and Switzerland from the 1980s to today
I show that house prices can be modeled using machine learning (kNN and tree-bagging) and a small dataset composed of macro-economic factors (MEF), including an inflation metric (CPI), US treasury rates (10-yr), Gross Domestic Product (GDP), and portfolio size of central banks (ECB, FED). This set of parameters covers all the parties involved in a transaction (buyer, seller, and financing facility) while ignoring the intrinsic properties of each asset and encompassing local (inflation) and liqu…

Freeze-in production of scalaron dark matter in $f(R)$ gravity
Basabendu Barman, Ashmita Das, Rakesh Kumar SivaKumar, Rudra Pratap Udgata
https://arxiv.org/abs/2506.06436

Freeze-in production of scalaron dark matter in $f(R)$ gravity
We demonstrate that the scalaron, a scalar degree of freedom, emerging from the $f(R)$ theory of gravity, can account for the observed dark matter (DM) abundance if its mass is around the MeV scale, to ensure its cosmological stability. Focusing on two well-known $f(R)$ gravity models, we systematically show that if scalaron production proceeds via the freeze-in mechanism, the right relic abundance is satisfied over a very narrow window of reheating temperature $10^{14}\lesssim T_{\rm rh}\lesss…

One last push:
The @… app campaign is just €7000 away from it's €55,000 target, and 2 days to go. Surely there are #fedizens who may not have seen this already? If they make the €55,000 target I promise to write a peertube channel into my next grant proposal, AND I'll post some better quality videos of our Greenland and #Antarctic research over the coming weeks...
Go!
#bigTech derisory) amount of EUR 75,000 to develop the opensource #fediverse competitor app to Youtube. Maybe chuck 'em a few euros if you think it useful?
https://support.joinpeertube.org/en/

The #Fediverse is amazing, less than 24 hours after I posted this and @… is only €223 from the penultimate target with 30 hours to go.
Not taking any credit for that, but happy to see a chord has been struck for all genuine surveillance-capital-free social media. Even more important in the time of #NoKings.
Looks like I'm going to be busy making #Science videos on #ClimateChange in the #Polar Regions too for the next few weeks.
Here's one I made earlier on #SurfaceMass Budget. Let me know if there's something #Climate and/or #ice related you'd like to see a short clip about and I'll see what we can do
#fedizens who may not have seen this already? If they make the €55,000 target I promise to write a peertube channel into my next grant proposal, AND I'll post some better quality videos of our Greenland and #Antarctic research over the coming weeks...
Go!
#bigTech derisory) amount of EUR 75,000 to develop the opensource #fediverse competitor app to Youtube. Maybe chuck 'em a few euros if you think it useful?
https://support.joinpeertube.org/en/