Tootfinder

In the beginning was the Tao. The Tao gave birth to Space and Time.
Therefore, Space and Time are the Yin and Yang of programming.
Programmers that do not comprehend the Tao are always running out of
time and space for their programs. Programmers that comprehend the Tao always
have enough time and space to accomplish their goals.
How could it be otherwise?
-- Geoffrey James, "The Tao of Programming"

Continuous Space-Time Video Super-Resolution with 3D Fourier Fields
Alexander Becker, Julius Erbach, Dominik Narnhofer, Konrad Schindler
https://arxiv.org/abs/2509.26325 https:/…

Continuous Space-Time Video Super-Resolution with 3D Fourier Fields
We introduce a novel formulation for continuous space-time video super-resolution. Instead of decoupling the representation of a video sequence into separate spatial and temporal components and relying on brittle, explicit frame warping for motion compensation, we encode video as a continuous, spatio-temporally coherent 3D Video Fourier Field (VFF). That representation offers three key advantages: (1) it enables cheap, flexible sampling at arbitrary locations in space and time; (2) it is able t…

The Case for Space: Estimating Precise Time Delays from Ground- and Space-Based Observations of Lensed Supernovae with Glimpse
Erin E. Hayes, Suhail Dhawan, Stephen Thorp, Justin D. R. Pierel, Nikki Arendse
https://arxiv.org/abs/2509.25350

The Case for Space: Estimating Precise Time Delays from Ground- and Space-Based Observations of Lensed Supernovae with Glimpse
The delay in arrival time of the multiple images of gravitationally lensed supernovae (glSNe) can be related to the present-day expansion rate of the universe, $H_{0}$. Despite their rarity, Rubin Observatory's Legacy Survey of Space and Time (Rubin-LSST) is expected to discover tens of galaxy-scale glSNe per year, many of which will not be resolved due to their compact nature. Follow-up from ground- and space-based telescopes will be necessary to estimate time delays to sufficient precision fo…

For ESA’s mission #Vigil to forecast dangerous space weather, #mpsgoettingen is providing one of the key instruments: Vigil's Photospheric Magnetic Field Imager. Read more about the instrument and the science we plan to do with it here:

On the dependence of the nonlinear Schrodinger flow upon the power of the nonlinearity
R\'emi Carles (IRMAR), Quentin Chauleur (LPP), Guillaume Ferriere (LPP)
https://arxiv.org/abs/2509.26414

On the dependence of the nonlinear Schrodinger flow upon the power of the nonlinearity
We prove continuity properties for the flow map associated to the defocusing energy-subcritical power-like nonlinear Schr{ö}dinger equation, when the power varies. We show local in time continuity in the energy space for any power, and global in time continuity for sufficiently large powers. When the linear dispersive rate is counterbalanced by a time-dependent rescaling, we show a uniform in time continuity of the squared modulus of this rescaled function, in Kantorovich distance, for any pow…

Cowboys' salary cap space proves Dallas can make drastic move at NFL trade deadline https://www.si.com/nfl/cowboys/onsi/news/dallas-cowboys-salary-cap-space-make-drastic-nfl-trade-deadline-move

Spent time today helping a VAR upgrade from one support appliance to another. Not my job but I get sucked into these things. While racking the new one I found an unknown box in the rack. "What is this?" "Oh, thats <vendor>'s box. We stopped using them years ago." Cue me finding a Ubuntu 16.04 box STILL ON OUR NETWORK FROM A VAR WE DON'T USE. Keep in mind, these are the same folks that run around screaming about security. Some days I really want to just wa…

Second-timescale Glints from Satellites and Space Debris Detected with Tomo-e Gozen
Masaomi Tanaka, Ichiro Takahashi, Naoki Yoshida, Naonori Ueda, Akisato Kimura, Kazuma Mitsuda, Hirofumi Noda, Shigeyuki Sako, Noriaki Arima, Mitsuru Kokubo, Tomoki Morokuma, Yuu Niino, Nozomu Tominaga, Kenzo Kinugasa, Naoto Kobayashi, Sohei Kondo, Yuki Mori, Ryou Ohsawa, Hidenori Takahashi, Satoshi Takita

Second-timescale Glints from Satellites and Space Debris Detected with Tomo-e Gozen
A search for second-timescale optical transients is one of the frontiers of time-domain astronomy. However, it has been pointed out that reflections of sunlight from Earth-orbiting objects can also produce second-timescale ``glints.'' We conducted wide-field observations at 2 frames per second using Tomo-e Gozen on the 1.05 m Kiso Schmidt telescope. We identified 1554 point-source glints that appeared in only one frame (0.5 sec). Their brightness ranges from 11 to 16 mag, with fainter glints be…

Delay-Doppler Domain Channel Measurements and Modeling in High-Speed Railways
Hao Zhou, Yiyan Ma, Dan Fei, Weirong Liu, Zhengyu Zhang, Mi Yang, Guoyu Ma, Yunlong Lu, Ruisi He, Guoyu Wang, Cheng Li, Zhaohui Song, Bo Ai
https://arxiv.org/abs/2509.25854

Delay-Doppler Domain Channel Measurements and Modeling in High-Speed Railways
As next-generation wireless communication systems need to be able to operate in high-frequency bands and high-mobility scenarios, delay-Doppler (DD) domain multicarrier (DDMC) modulation schemes, such as orthogonal time frequency space (OTFS), demonstrate superior reliability over orthogonal frequency division multiplexing (OFDM). Accurate DD domain channel modeling is essential for DDMC system design. However, since traditional channel modeling approaches are mainly confined to time, frequency…

BALLAST: Bayesian Active Learning with Look-ahead Amendment for Sea-drifter Trajectories under Spatio-Temporal Vector Fields
Rui-Yang Zhang, Henry B. Moss, Lachlan Astfalck, Edward Cripps, David S. Leslie
https://arxiv.org/abs/2509.26005

BALLAST: Bayesian Active Learning with Look-ahead Amendment for Sea-drifter Trajectories under Spatio-Temporal Vector Fields
We introduce a formal active learning methodology for guiding the placement of Lagrangian observers to infer time-dependent vector fields -- a key task in oceanography, marine science, and ocean engineering -- using a physics-informed spatio-temporal Gaussian process surrogate model. The majority of existing placement campaigns either follow standard `space-filling' designs or relatively ad-hoc expert opinions. A key challenge to applying principled active learning in this setting is that Lagra…

Quantum Simulation of Random Unitaries from Clebsch-Gordan Transforms
Dmitry Grinko, Satoshi Yoshida
https://arxiv.org/abs/2509.26623 https://arxiv.org/pdf…

Quantum Simulation of Random Unitaries from Clebsch-Gordan Transforms
We present a general method for simulating an action of $t$ copies of a Haar random unitary for arbitrary compact groups. This construction can be viewed as a representation-theoretic generalization of Zhandry's compressed function oracle technique. It is conceptually simple, exact and utilizes Clebsch-Gordan transforms as main building blocks. In particular, for the unitary group, our method is efficient in space and time. Finally, our general oracle for forward queries can be easily modified …

Russia loses ability to send humans into space for first time in 60 years | Ukrainska Pravda
https://www.pravda.com.ua/eng/news/2025/11/28/8009355/

Pilot design, channel estimation, and target detection for integrated sensing and communication with OTFS
Dazhuo Wang, Yonghong Zeng, Yuhong Wang, Francois Chin, Yugang Ma, Sumei Sun
https://arxiv.org/abs/2509.25846

Pilot design, channel estimation, and target detection for integrated sensing and communication with OTFS
Recent studies shows that the orthogonal time frequency space (OTFS) waveform is a promising candidate for future communication. To meet users' potential demand for Integrated Sensing and Communication (ISAC) applications in 6G, the usage of OTFS for both radar sensing and wireless communication needs to be explored. In this paper, we propose a Fast Algorithm OTFS radar (FAOR) that can perform radar sensing in low complexity to detect the range and speed of the targets. It computes the 2D cycli…

Bi-Hamiltonian Structures and Equivalent Representations of the Pais-Uhlenbeck Model
Bethan Turner
https://arxiv.org/abs/2509.26477 https://arxiv.org/pdf/2…

Bi-Hamiltonian Structures and Equivalent Representations of the Pais-Uhlenbeck Model
We provide a complete classification of all the ways the Pais-Uhlenbeck osicllator might be embedded in two dimensional space. We discuss the Bi-Hamiltonian structures of this model, and examine how alternative Hamiltonian structures might be generated from the dynamical Lie symmetries of the theory. We then examine how the Bi-Hamiltonian strucutre may be exploited to evade the problem of unbounded Hamiltonians that is usually associated with Higher Time Derivative Theories. The effect of inter…

LLM-Powered Code Analysis and Optimization for Gaussian Splatting Kernels
Yi Hu (North Carolina State University), Huiyang Zhou (North Carolina State University)
https://arxiv.org/abs/2509.25626

LLM-Powered Code Analysis and Optimization for Gaussian Splatting Kernels
3D Gaussian splatting (3DGS) is a transformative technique with profound implications on novel view synthesis and real-time rendering. Given its importance, there have been many attempts to improve its performance. However, with the increasing complexity of GPU architectures and the vast search space of performance-tuning parameters, it is a challenging task. Although manual optimizations have achieved remarkable speedups, they require domain expertise and the optimization process can be highly…

Light propagation in 2PN approximation in the monopole and quadrupole field of a body at rest: The basic transformations
Sven Zschocke
https://arxiv.org/abs/2509.26164 https://

Light propagation in 2PN approximation in the monopole and quadrupole field of a body at rest: The basic transformations
Todays astrometry has reached the micro-arcsecond level in angular measurements of celestial objects. The next generations of astrometric facilities are aiming at the sub-micro-arcsecond scale. Sub-micro-arcsecond astrometry requires a considerable improvement in the theory of light propagation in the curved space-time of the solar system. In particular, it is indispensable to determine light trajectories to the second order of the post-Newtonian scheme, where the monopole and quadrupole struct…

Series D, Episode 08 - Games
GERREN: Told you, there was no time. Besides, from what I've heard, she might be more than a match for you.
AVON: Well now. Just who are they sending?
https://blake.torpidity.net/m/408/87 B7B3

Mosquitoes found in Iceland for first time after record heat https://www.bbc.com/news/articles/clyz3vv62pgo?at_medium=RSS/Mastodon
Mosquitoes found in Iceland for first time as climate crisis warms country

Mosquitoes found in Iceland for first time after record heat
Previously the country was one of the world's only mosquito-free zones.

Experimental overview of electromagnetic radiation in heavy-ion collisions
Sebastian Scheid
https://arxiv.org/abs/2509.26456 https://arxiv.org/pdf/2509.264…

Experimental overview of electromagnetic radiation in heavy-ion collisions
Electromagnetic (EM) probes such as photons and dileptons provide direct insight into the space-time evolution of the hot and dense matter formed in heavy-ion collisions. Being unaffected by strong interactions, they serve as penetrating messengers from all collision stages, from pre-equilibrium dynamics to the quark-gluon plasma (QGP) and hadronic phases. This contribution summarises recent experimental results on direct-photon and dilepton production from RHIC and LHC experiments, as well as …

I was just thinking about how the fact that #Musk named his AI "Grok" is evidence that he "reads sci-fi" in the same way he "plays video games." Like, he claims to do it but when it comes time to show the evidence it's clear he does not actually "grok" it.
Like... To grok something is to have a layer deeper than simply knowledge, but mathematically encoding statistical relationships between words is pretty obviously not even understanding much less qualifying as "groking" it. In the book, the ability to grok something is also the ability to annihilate that thing with a thought. Just pretending that an LLM actually *was* something that could become AGI (which it's not), this name would imply the AI would have the power to annihilate reality. That's bad. That's a bad name for an AI.
And why would a greedy fascist name something of his after something an anarchist communist space Jesus taught to the hippie cult he started? There are so many layers of facepalm to this. It's some kind of php-esque fractal of incompetence.
Like, there's no reason to talk about this but my brain does this to me sometimes and now it's your problem.

RE: https://lgbtqia.space/@alice/115574275924393128
Describe a time that you did something kind for someone—even if it was small—without anticipating anything in return.
I do kind things all the time! One time while staring at a …

I’ve worked over the past year to reduce the amount of noise in my consciousness on a daily basis.
By that I mean - information noise, not literal sounds “noise”. (That problem was solved long ago by some good earplugs and noise canceling earphones.)
I’ve gotten used to spending less time on social media, regularly blocking most apps on my devices (anything with a feed news, most work communication apps, etc.), putting my phone and other devices aside for extended periods of time. Often go to work places with my iPad explicitly having its WiFi turned off and selecting cafes that don’t offer WiFi at all.
Negotiated better boundaries at work and in personal life where I exchange messages with people less often but try to make those interactions more meaningful, and people rarely expect me to respond to requests in less than 24 hours. Spent a lot of time setting up custom notification settings on all apps that would allow it, so I get fewer pings. With software, choosing fewer cloud-based options and using tools that are simple and require as few interruptions as possible.
Accustomed myself to lower-tech versions of doing things I like to do: reading on paper, writing by hand, drawing in physical sketchbooks, got a typewriter for typing without a screen. Choosing to call people on audio more, trying to make more of an effort to see people in person. Going to museums to look at art instead of browsing Pinterest. Defaulting to the library when looking for information.
I’m commenting on this now for two reasons:
1. I am pretty proud of myself for how much I’ve actually managed to reduce the constant stream of modern life esp. as a remote worker in tech!
2. Now that I’ve reached a breaking point of reducing enough noise that it’s NOTICEABLE - I am struck by the silence. I don’t know what to do with it. I don’t know how to navigate it and fill it. I made this space to be able to read and write and think more deeply - for now I feel stuck in limbo where I’m just reacquainting myself with the concept of having any space in my mind at all.

Co-SOM: Co-training for photometric redshift estimation using Self-Organizing Maps
Alvaro Callejas-Tavera, Erik Molino-Minero-Re, Octavio Valenzuela
https://arxiv.org/abs/2509.25366

Co-SOM: Co-training for photometric redshift estimation using Self-Organizing Maps
The upcoming galaxy large-scale surveys, such as the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST), will generate photometry for billions of galaxies. The interpretation of large-scale weak lensing maps, as well as the estimation of galaxy clustering, requires reliable redshifts with high precision for multi-band photometry. However, obtaining spectroscopy for billions of galaxies is impractical and complex; therefore, having a sufficiently large number of galaxies with spe…

Series B, Episode 02 - Shadow
CALLY: I want you back here. Get ready to teleport.
VILA: Wasting your time, Cally. I'm not wearing a bracelet. I'm not going to be snatched away in the middle of...in the middle of anything. Sightseeing. And you should see some of the sights I'm seeing. No. Perhaps you shouldn't.
https://

Mad Tribe is quickly becoming one of my favorite Psytrance artists, especially since it’s a collaboration between SPACE TRIBE and MAD MAXX (Olli Wisdom and Max Peterson), two of my all-time favorite psytrance acts.
https://madtribe.bandcamp.com

11/16/85 long beach: rare post-’74 2nd set TENNESSEE JED, last time as set opener, more juice than usual; same for CUMBERLAND BLUES, a lesh slot. 57-minute CRAZY FINGERS > DRUMZ > SPACE > COMES A TIME > GIMME SOME LOVIN’ > TRUCKIN’ > BLACK PETER > GOOD LOVIN’. shaky CRAZY FINGERS lyrics, but deep wounded COMES A TIME holds achingly steady. solid Beamin’ melts to thoughtful garcia/weir SPACE. GIMME SOME LOVIN’ vocal jamminess. weir takes mic off stand & wanders for GO…

And the next space launch webcast is on: #NewShepard 37 - see https://www.blueorigin.com/news/new-shepard-ns-37-mission and https://abcnews.go.com/US/1st-time-person-wheelchair-fly-space/story?id=128483608 and https://edition.cnn.com/2025/12/18/science/blue-origin-launch-benthaus-koenigsmann for more.

Cool, von @… gibt es ebenfalls eine Jahresrückschau :) Sogar mit Alt-Text-Generator für die SharePics. Gefällt mir.
In den Top 10 habe ich noch #LinkinPark und #Moderat

I got those new disks loaded into the TrueNAS server and have been moving things around to make more space on the primary pool.
I've got my home computers running backups to the NAS and most of the Macs also have Time Machine drives attached...
At this point I'm still missing off-site backups but I can look into that by placing a small NAS at the office.
#TrueNAS

I'm reading job applications and have noticed that multiple people referenced that they are sufficient in the 4D development process.
I have now learned that they are not programming across space and time?!
They can Define, Design, Develop and Deploy!
A buzzword for “I am able to be a one-person-team”. Now you know!

Heineman shared the message last night that her health was rapidly declining.
"It's time. According to my doctors. All further treatments are pointless," Heineman wrote.
"So, please donate so my kids can create a funeral worthy of my keyboard, Pixelbreaker! So I can make a worthy entrance for reuniting with my one true love, Jennell Jaquays."
Game developers have begun sharing their own condolences and remembrances in the wake of Heineman's death

Legendary game designer, programmer, Space Invaders champion, and LGBTQ trailblazer Rebecca Heineman has died
Heineman's cancer fundraiser is now collecting for her funeral.

Towards Inference-time Scaling for Continuous Space Reasoning
Minghan Wang, Thuy-Trang Vu, Ehsan Shareghi, Gholamreza Haffari
https://arxiv.org/abs/2510.12167 https://

Towards Inference-time Scaling for Continuous Space Reasoning
Inference-time scaling through multiple sample generation in combination with Process- or Outcome-Reward Model (PRM or ORM) re-ranking has proven effective for text-based reasoning in large language models. This paper investigates whether such established techniques can be successfully adapted to reasoning in the continuous space, using COCONUT (Hao et al. 2024) continuous space reasoning LM as the backbone. We demonstrate the feasibility of generating diverse reasoning paths through dropout-ba…

Starcloud, which launched a satellite with a Nvidia H100 chip in November, says the satellite is running and querying responses from Google's Gemma (Pia Singh/CNBC)
https://www.cnbc.com/2025/12/10/nvidia-backed-starcloud-tr…

‘Greetings, earthlings’: Nvidia-backed Starcloud trains first AI model in space as orbital data center race heats up
The company's Starcloud-1 satellite is running Gemma, an open model from Google, marking the first time in history that an LLM has been trained in outer space.

Decent folks may want to block this libertarian, pro-genocide instance.
(libertarian.communitynetwork.space)
https://libertarian.communitynetwork.space/objects/0b38de6a-3cbe-4113-8fbb-25b17b6e5dfe

Korsier (@korsier@libertarian.communitynetwork.space)
@aral Well, she didn't learn her lesson the first time.

A Photometric Classifier for Tidal Disruption Events in Rubin LSST
Kunal Bhardwaj, Asen Christov, Sergey Karpov
https://arxiv.org/abs/2509.25902 https://ar…

A Photometric Classifier for Tidal Disruption Events in Rubin LSST
Tidal Disruption Events (TDEs) are astrophysical phenomena arising when stars are disrupted by supermassive black holes. The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST), with its unprecedented depth and cadence, will detect thousands of TDEs, motivating the need for robust photometric classifiers capable of efficiently distinguishing these events from other extragalactic transients. We aim to develop and validate a machine learning pipeline for photometric TDE identificatio…

China’s coastal cities are sinking as seas rise at record speed #China

China’s coastal cities are sinking as seas rise at record speed
Sea levels are rising faster than at any time in 4,000 years, scientists report, with China’s major coastal cities at particular risk. The rapid increase is driven by warming oceans and melting ice, while human activities like groundwater pumping make it worse. In some areas, the land itself is sinking faster than the ocean is rising. Still, researchers see progress as cities like Shanghai adopt new technologies to stabilize the ground and prepare for the future.

Hey kids! Are you bored? Here's a tip: annoy your parents! It's the hottest new trend. Your parents weren't actually doing anything important. Get all up in their personal space, ask endless questions, babble if you can't think of anything to say, fight with your sibling(s), accidentally knock over or break whatever thing your parents were trying to fix or make! It's fun! And remember, your parents are, like, REALLY old; so you need to take advantage of the time you have …

A time-space B-spline integrator for the Burgers' equation
Idris Dag, Serkan U\u{g}urluo\u{g}lu, Nihat Adar
https://arxiv.org/abs/2510.09408 https://ar…

A time-space B-spline integrator for the Burgers' equation
The purpose of this paper is to propose a new algorithm for obtaining approximate solutions to the Burgers' equation (BE). Integration in time by a quadratic B-spline collocation method is shown. To the best of our knowledge, B-splines have not previously been used to integrate partial differential equations in both time and space. First, the BE is integrated using quadratic B-spline functions in time, and then the time-integrated BE is further solved in space via the cubic B-spline collocation…

I turned the heat on for the first time, this morning. That probably means that I need to take the fan out of the office and replace it with the space heater.

Where I Wuz 41 Years Ago #OTD Tonight:
#BigBlack at #DCSpace
Oct 24, 1984: Washington, DC
Probably my first time seeing the scrawny yet still freakishly imposing Albini backed by his drum machine "Roland" , wi…

This framing doesn’t even touch the crucial forces of ego and identity formation and craving for belonging that are the bedrock of fascist movements like MAGA. Others are thinking productively about that, and it’s at least as important here!
That belief-as-identity phenomenon is also time-based. Somebody posted about those Young Republicans and their Telegram messages grooming and being groomed for fascism, and that’s right: it’s not just the existence of the fascist space; it’s the sustained process of drawing people in over time.
5/

On Structured State-Space Duality
Jerry Yao-Chieh Hu, Xiwen Zhang, Weimin Wu, Han Liu
https://arxiv.org/abs/2510.04944 https://arxiv.org/pdf/2510.04944

On Structured State-Space Duality
Structured State-Space Duality (SSD) [Dao & Gu, ICML 2024] is an equivalence between a simple Structured State-Space Model (SSM) and a masked attention mechanism. In particular, a state-space model with a scalar-times-identity state matrix is equivalent to a masked self-attention with a $1$-semiseparable causal mask. Consequently, the same sequence transformation (model) has two algorithmic realizations: as a linear-time $O(T)$ recurrence or as a quadratic-time $O(T^2)$ attention. In this note,…

The Bills might be in trouble, plus drama in Laker-land https://www.nytimes.com/athletic/6824633/2025/11/21/bills-texans-josh-allen-the-pulse/

ONLINE SEMINAR: Nature and Boundaries: Water, Space, and the Sensory Experience of the Rus'-Steppe Frontier (1050s–1100s) https://networks.h-net.org/group/announcements/20135270/online-seminar-nature-and-boundaries-water-spac…

Is it just me? Perhaps because I often have only one or two tabs open - I'm a compulsive tab closer. But the new UI in macOS Safari for handling tabs wastes space, is hard to use, and confuses me constantly about where the URL box is and such. I am unsure why it passed muster at product review time.
Perhaps it works well for others. But even if you always have more than one tab open, it still wastes vertical space.

Space-time singularities in spatially-chirped Laguerre-Gaussian beams of any order
Spencer W. Jolly
https://arxiv.org/abs/2510.11161 https://arxiv.org/pdf/…

Space-time singularities in spatially-chirped Laguerre-Gaussian beams of any order
The electric field distributions and space-time singularity curves are computed for ultrashort pulsed Laguerre-Gaussian laser beams having spatial chirp. Due to the breaking of cylindrical symmetry by the spatial chirp, the singularities trace complicated curves in space-time, which also vary for different combinations of radial and vortical orders. Analytical solutions are mostly presented along with a recipe for numerically calculating higher orders. The behavior of the singularities upon pro…

On the Relationship between Space-Time Accessibility and Leisure Activity Participation
Yuan Liao, Rafael H. M. Pereira, Jorge Gil, Silvia De Sojo Caso, Laura Alessandretti
https://arxiv.org/abs/2510.10307

On the Relationship between Space-Time Accessibility and Leisure Activity Participation
Understanding how accessibility shapes participation in leisure activities is central to promoting inclusive and vibrant urban life. Conventional accessibility measures often focus on potential access from fixed home locations, overlooking the constraints and opportunities embedded in daily routines. In this study, we introduce a space-time accessibility (SPA) metric rooted in the capability approach, capturing feasible leisure opportunities between home and work given a certain time budget, in…

macOS is like "yeah we've got 100GB of Time Machine backups cached, but don't worry, if you need the space, we'll just delete them!"
Well, that was a lie.

I officially re-repost this toot by Gato Negro @…!!
"
It is a very dense black cat, so dense that it bends the space-time of the pillow. 🐈‍⬛
🐈‍⬛
#catsofmastodon #cats

from my link log —
Resizable arrays in optimal time and space.
https://cs.uwaterloo.ca/~imunro/cs840/ResizableArrays.pdf
saved 2025-12-18 ht…

Adaptive Science Operations in Deep Space Missions Using Offline Belief State Planning
Grace Ra Kim, Hailey Warner, Duncan Eddy, Evan Astle, Zachary Booth, Edward Balaban, Mykel J. Kochenderfer
https://arxiv.org/abs/2510.08812

Adaptive Science Operations in Deep Space Missions Using Offline Belief State Planning
Deep space missions face extreme communication delays and environmental uncertainty that prevent real-time ground operations. To support autonomous science operations in communication-constrained environments, we present a partially observable Markov decision process (POMDP) framework that adaptively sequences spacecraft science instruments. We integrate a Bayesian network into the POMDP observation space to manage the high-dimensional and uncertain measurements typical of astrobiology missions…

Series A, Episode 13 - Orac
BLAKE: All right, put us down.
[Scene: The planet's surface. Blake and Cally land near the obelisk.]
BLAKE: Some sort of obelisk, I suppose.
CALLY: Well, what should we do now?
https://blake.torpidity.net/m/113/170 B7B5

Feynman Formula for Discrete-time Quantum Walks
Jean-Pierre Fouque, Tomoyuki Ichiba, Ka Lok Lam
https://arxiv.org/abs/2510.12038 https://arxiv.org/pdf/2510…

Feynman Formula for Discrete-time Quantum Walks
We explicitly connect (discrete-time) quantum walks on Z with a four-state Markov additive process via a Feynman-type formula (2.5). Using this representation, we derive a relation between the spectral decomposition of the Markov additive process and the limiting density of the homogeneous quantum walk. In addition, we consider a space-time rescaling of quantum walks, which leads to a system of quantum transport PDEs in continuous time and space with a phase interaction term. Our probabilistic …

Deadly floods in Mexico another sign of need for improved severe weather warnings #Mexico

Deadly floods in Mexico another sign of need for improved severe weather warnings
The most recent torrential rains in east-central Mexico, which have left at least 76 dead and dozens more missing, have raised questions again about the government's ability to alert people to severe weather in time.

Loop functions of sunset graphs in 2 1 space-time dimensions
N. Kaiser
https://arxiv.org/abs/2510.08704 https://arxiv.org/pdf/2510.08704

Loop functions of sunset graphs in 2+1 space-time dimensions
In these notes the relativistic $n$-body phase-phase is calculated iteratively in $2+1$ space-time dimensions for all $n$. The obtained result shows a simple power-law behavior $α_n (μ-M)^{n-2}/μ$ with a dependence only on the total mass $M=m_1+\dots + m_n$. As a consequence of this feature, the $(n-1)$-loop integrals $J_n(-q^2)$ associated to sunset graphs with $n$ internal lines can be expressed through of elementary (arctangent and logarithmic) functions, modulo polynomial terms in $q^2$ …

Interstellar’s second life: how Christopher Nolan’s most divisive film became his most loved https://www.theguardian.com/film/2025/oct/21/interstellar-christopher-nolan-film-memes-divisive-most-loved?CMP=S…

There's some rich scientific literature on volunteering and how volunteer motivations change and shift from initial engagement to sustained contributing, including some work we've done in that space around motivations for engaging with self-research communities.
Maybe it's time for a another blog post to look at that in more detail 😅

Generalized Bishop frames of regular time-like curves in 4-dimensional Lorentz space $\mathbb{L}^{4}$
Subaru Nomoto
https://arxiv.org/abs/2510.09345 https://

Generalized Bishop frames of regular time-like curves in 4-dimensional Lorentz space $\mathbb{L}^{4}$
We introduced generalized Bishop frames on curves in 4-dimensional Euclidean space $\mathbb{E}^{4}$, which are orthonormal frames such that the derivatives of the vectors of the frames along the curve can be expressed, via a certain matrix, as a linear combination of the vectors of the frame. In relation to that, we study generalized Bishop frames of regular time-like curves. In a previous work, we showed that there is a hierarchy among different types of generalized Bishop frames for regular…

Not only Lemmon but also #comet #SWAN has been imaged by Kimiya Yui from the #ISS: in https://x.com/Astro_Kimiya/status/1982242913389015085 it's peeking through the space station's solar arrays. (AFAIK this is a first, *two* comets getting imaged from the ISS at the same time.)

Time to harness the sun! ☀️🛰️
We are LIVE for today's 3D printing stream, and we're adding more solar arrays to the Tiangong space station model. Powering the space race, one layer at a time (and still running smooth on Linux, naturally 🐧).
Tune in to watch the model grow: 👇 https://www.twitch.tv/tuxramus

if you see me posting with random double spaces between words its not bc I'm ancient and don't know how to type it's bc SwiftKey just REALLY wants to double space all the goddamn time for some reason

ICE documents reveal plan to hold 80,000 immigrants in warehouses
The Trump administration is seeking contractors to help it overhaul the United States’ immigrant detention system
in a plan that includes renovating industrial warehouses to hold more than 80,000 immigrant detainees at a time,
according to a draft solicitation reviewed by The Washington Post.

Rather than shuttling detainees around the country to wherever detention space is available, as happens now, …

ICE documents reveal plan to hold 80,000 immigrants in warehouses
The Trump administration wants to build seven large-scale deportation hubs to speed up deportations, internal ICE documents show.

Robust Closed-Form Control for MIMO Nonlinear Systems under Conflicting Time-Varying Hard and Soft Constraints
Farhad Mehdifar, Charalampos P. Bechlioulis, Dimos V. Dimarogonas
https://arxiv.org/abs/2510.11393

Robust Closed-Form Control for MIMO Nonlinear Systems under Conflicting Time-Varying Hard and Soft Constraints
This paper introduces a novel robust closed-form control law to handle time-varying hard and soft constraints in uncertain high-relative-degree nonlinear MIMO systems. These constraints represent spatiotemporal specifications in mechanical systems' operational space, with hard constraints ensuring safety-critical requirements and soft constraints encoding performance or task objectives. Initially, all constraints are consolidated into two separate scalar time-varying hard and soft constraint fu…

Space impacts temporal processing via a visual-dependent spatially organized neural architecture https://doi.org/10.1523/jneurosci.1444-24.2025 "spatial features affected the temporal processing of sighted but not blind people, regardless of age."

Space impacts temporal processing via a visual-dependent spatially organized neural architecture
Establishing the temporal relationship between stimuli challenges the brain, requiring some tolerance for asynchronies to form coherent representations. Based on the theory of implicit causal inference, we hypothesized temporal processing of events is influenced by spatial features as stimuli coming from the same spatial location are most likely to derive from a common source and, consequently, implicitly merged in time. As visual experience guides the formation of neural sensory maps, we expec…

Space-time reversible graph rewriting
Pablo Arrighi, Marin Costes, Luidnel Maignan
https://arxiv.org/abs/2510.03296 https://arxiv.org/pdf/2510.03296…

Space-time reversible graph rewriting
In the mathematical tradition, reversibility requires that the evolution of a dynamical system be a bijective function. In the context of graph rewriting, however, the evolution is not even a function, because it is not even deterministic -- as the rewrite rules get applied at non-deterministically chosen locations. Physics, by contrast, suggests a more flexible understanding of reversibility in space-time, whereby any two closeby snapshots (aka `space-like cuts'), must mutually determine each …

MCMC for State Space models
Paul Fearnhead, Chris Sherlock
https://arxiv.org/abs/2510.04932 https://arxiv.org/pdf/2510.04932…

MCMC for State Space models
A state-space model is a time-series model that has an unobserved latent process from which we take noisy measurements over time. The observations are conditionally independent given the latent process and the latent process itself is Markovian. These properties lead to simplifications for the conditional distribution of the latent process given the parameters and the observations. This chapter looks at how we can leverage the properties of state-space models to construct efficient MCMC sampler…

MAQCY: Modular Atom-Array Quantum Computing with Space-Time Hybrid Multiplexing
Andrew Byun, Chanseul Lee, Eunsik Yoon, Minhyuk KimMinhyuk Kim, Tai Hyun Yoon
https://arxiv.org/abs/2510.02940

MAQCY: Modular Atom-Array Quantum Computing with Space-Time Hybrid Multiplexing
We present a modular atom-array quantum computing architecture with space-time hybrid multiplexing (MAQCY), a dynamic optical tweezer-based protocol for fully connected and scalable universal quantum computation. By extending the concept of globally controlled static dual-species Rydberg atom wires [1], we develop an entirely new approach using Q-Pairs, which consist of globally controlled and temporally multiplexed dual-species Rydberg blockaded atom and superatom pairs. Space-time hybrid mult…

The Space-Time Connectivity Theorem for Normal Currents
Paolo Bonicatto, Filip Rindler, Harry Turnbull
https://arxiv.org/abs/2510.08360 https://arxiv.org/p…

The Space-Time Connectivity Theorem for Normal Currents
This work establishes a Space-Time Connectivity Theorem for normal currents. In analogy to classical results by Federer and Fleming as well as a recent theorem for integral currents by the second author, this result allows one to witness the weak* convergence of a uniformly bounded sequence of boundaryless normal currents with a space-time normal current that connects the elements of the sequence with their limit. The space-time setting is distinguished from the classical case in that this conn…

Any sufficiently advanced disaster preparedness is indistinguishable from revolutionary dual power. This essay is a bit of a transition between the theory I've written earlier, and more concrete plans.
Even though I only touched on my life on the commune, it was hard not to write more. These are such weird spaces, with so much invisible opportunity. But they're also just so unique and special. For all the stress and uncertainty of making sure you stayed on Lorean's (the head priestess), there were also those long summer nights with the whole community (except the old lady) gathered around a fire, talking and drinking. There was almost a child-like play to the whole time.
There were so Fridays I'd come home with a couple of gallons of beer from the real world, folks would bring things from the garden, someone would grill a steak, everyone who didn't cook would clean up, and we'd just hang out and have fun. So many evenings I'd go over to Miles place with a guitar, or with his guitar, and we'd pass it around over a few beers, talking about philosophy, Star Wars, or some book or other. It's hard not to write about the strange magic of that space.
My partner and I bonded over similar experiences, mine on a weird little religious commune in California and theirs as a temporary worker at Omega Institute. Both had exploitation, people on weird power trips, frustrating dynamics, but also a strange magic and freedom. Both were sort of fantasy worlds, but places that let us see through this one, let us imagine something that something else is possible behind the veil.
There are many such veils.
Perhaps it's fitting that this is more meandering, as a good wander can help the transition between lots of hard thinking and lots of hard working.
https://anarchoccultism.org/building-zion/evaluating-options
Editing feedback (especially typos, spelling, grammar) is always welcome, as are questions and even wider structural advice. I've been adding the handles of folks who provide feedback to the intro in a "thank you" section. If you do help and wouldn't like to be added, please let me know.

Parareal in time and spectral in space fast L1 quasilinear subdiffusion solver
Josefa Caballero, {\L}ukasz P{\l}ociniczak, Kishin Sadarangani
https://arxiv.org/abs/2510.11023 ht…

Parareal in time and spectral in space fast L1 quasilinear subdiffusion solver
We consider the initial-boundary value problem for a quasilinear time-fractional diffusion equation, and develop a fully discrete solver combining the parareal algorithm in time with a L1 finite-difference approximation of the Caputo derivative and a spectral Galerkin discretization in space. Our main contribution is the first rigorous convergence proof for the parareal-L1 scheme in this nonlinear subdiffusive setting. By constructing suitable energy norms and exploiting the orthogonality of th…

A second #planetesimal collision in the #Fomalhaut system: #Hubble Sees Asteroids Colliding at Nearby Star for First Time / Zerstörerische Kollisionen in einem jungen Planetensystem: https://www.esa.int/Science_Exploration/Space_Science/Hubble_sees_asteroids_colliding_around_nearby_star / https://science.nasa.gov/missions/hubble/nasas-hubble-sees-asteroids-colliding-at-nearby-star-for-first-time/ / https://www.mpg.de/24356362/fomalhaut-staubwolken-durch-kollisionen

Freedom for Animals has delved into the dark world of the bird of prey industry for a second time, to carry out a major new investigation as part of our Tether and Torment campaign.
This comes seven years after our landmark 2018 report first brought national attention to the hidden suffering behind the industry, and exposed the continuing welfare failures in UK bird of prey centres.

Tether and Torment 2
Undercover investigation into Bird of Prey Zoos in the UK. Read our new report, published 2025.

Time-causal and time-recursive wavelets
Tony Lindeberg
https://arxiv.org/abs/2510.05834 https://arxiv.org/pdf/2510.05834

Time-causal and time-recursive wavelets
When to apply wavelet analysis to real-time temporal signals, where the future cannot be accessed, it is essential to base all the steps in the signal processing pipeline on computational mechanisms that are truly time-causal. This paper describes how a time-causal wavelet analysis can be performed based on concepts developed in the area of temporal scale-space theory, originating from a complete classification of temporal smoothing kernels that guarantee non-creation of new structures from f…

Note to self: Do not run more than one space heater in the basement at the same time.
Congrats to self: The UPS for the home server was worth it.

11/17/85 long beach: good age for CASSIDY & LOOKS LIKE RAIN, thunder rolling bigger & bigger on both. graceful allmans-y ribbons at CHINA CAT SUNFLOWER > I KNOW YOU RIDER peak. 19-minute HE’S GONE > SPOONFUL > GOOD TIME BLUES. HE’S GONE jam starting to sweetly molt before weir takes over; not-bad by SPOONFUL standards. garcia splits before mydland’s tune. 35-minute DRUMZ > SPACE > THE WHEEL > THROWING STONES > NOT FADE AWAY. fun underwater circus-y garcialogue SP…

General Intuition, which trains AI agents in spatial reasoning using Medal.tv game clips, raised a $133.7M seed led by Khosla Ventures and General Catalyst (Rebecca Bellan/TechCrunch)
https://techcrunch.com/2025/10/16/gene

General Intuition lands $134M seed to teach agents spatial reasoning using video game clips | TechCrunch
Late last year, OpenAI reportedly tried to buy Medal and its vast trove of video game data for $500M. Today, the company spun out a frontier research lab that's using that data to build AI agents that understand how they move through space and time, a concept called spatial-temporal reasoning.

Contraction and entropy production in continuous-time Sinkhorn dynamics
Anand Srinivasan, Jean-Jacques Slotine
https://arxiv.org/abs/2510.12639 https://arx…

Contraction and entropy production in continuous-time Sinkhorn dynamics
Recently, the vanishing-step-size limit of the Sinkhorn algorithm at finite regularization parameter $\varepsilon$ was shown to be a mirror descent in the space of probability measures. We give $L^2$ contraction criteria in two time-dependent metrics induced by the mirror Hessian, which reduce to the coercivity of certain conditional expectation operators. We then give an exact identity for the entropy production rate of the Sinkhorn flow, which was previously known only to be nonpositive. Exam…

Series A, Episode 04 - Time Squad
JENNA: All right. [walks toward the passage off Liberator flight deck, then stops]
BLAKE: Problem?
JENNA: Putting out a false distress signal. It's a trick used by space pirates.
https://blake.torpidity.net/m/104/60 B7B4

“It’s only a matter of time before people die”: Trump cuts hit food inspections https://arstechnica.com/health/2025/11/its-only-a-matter-of-time-before-people-die-trump-cuts-hit-food-inspections/

“It’s only a matter of time before people die”: Trump cuts hit food inspections
American inspections of foreign food facilities hit historic lows this year.

New charged dynamical particles in spatially flat FLRW space-times
Ion I. Cotaescu
https://arxiv.org/abs/2510.03444 https://arxiv.org/pdf/2510.03444…

New charged dynamical particles in spatially flat FLRW space-times
New time-dependent metric tensors with spherical symmetry satisfying the Einstein-Maxwell equations in space-times with FLRW asymptotic behaviour are derived here for the first time. These geometries describe dynamical charged non-rotating black holes hosted by the perfect fluid of the asymptotic FLRW space-times. Their gravitational sources are the stress-energy tensors formed by a contribution of the perfect fluid and an electromagnetic one due to the Coulomb field produced by the time-depend…

NEO: No-Optimization Test-Time Adaptation through Latent Re-Centering
Alexander Murphy, Michal Danilowski, Soumyajit Chatterjee, Abhirup Ghosh
https://arxiv.org/abs/2510.05635 h…

NEO: No-Optimization Test-Time Adaptation through Latent Re-Centering
Test-Time Adaptation (TTA) methods are often computationally expensive, require a large amount of data for effective adaptation, or are brittle to hyperparameters. Based on a theoretical foundation of the geometry of the latent space, we are able to significantly improve the alignment between source and distribution-shifted samples by re-centering target data embeddings at the origin. This insight motivates NEO -- a hyperparameter-free fully TTA method, that adds no significant compute compared…

Series D, Episode 11 - Orbit
SERVALAN: I hope so, Egrorian. I've waited a long time for this.
EGRORIAN: His death is a mathematical certainty. The product of a simple equation.
https://blake.torpidity.net/m/411/202 B7B6

There's so much more to this too. Like, I have so much more time and space to consider these things. I mend clothes, when I can. I fix electronics. Part of that is having the privilege (of time) to be able to do that. How many things are broken, wasted, whatever because of all this pressure on people?
It makes the waste of the ultra rich even more stark. They have the time, the privilege, to not waste. They have the capacity to reduce their impact more than any of us, and yet they choose to use more than all of us.

The Alps set to lose a record number of glaciers in the next decade, study warns #Alps

The Alps set to lose a record number of glaciers in the next decade, study warns
Glaciers are melting worldwide. In some regions, they could even disappear completely. Looking at the number of glaciers disappearing, the Alps could reach their peak loss rate as early as 2033 to 2041. Depending on how sharply the planet warms, this period may mark a time when more glaciers vanish than ever before. Worldwide, the peak glacier loss rate will occur about ten years later and could rise from 2,000 to 4,000 glaciers lost each year.

A04 - Time Squad
BLAKE: Zen, three sixty degree survey. Put etheric detector beams on maximum. Report any space vehicles within range. Vila, put visual survey on the screen.
ZEN: Negative on all systems. There are no space vehicles within detector range.
https://blake.torpidity.net/m/104/10…

The world's carbon emissions continue to rise—but 35 countries show progress in cutting carbon #environment

The world's carbon emissions continue to rise—but 35 countries show progress in cutting carbon
Global fossil fuel emissions are projected to rise in 2025 to a new all-time high, with all sources—coal, gas, and oil—contributing to the increase.

Ionospheric gradient estimation using ground-based GEO observations for monitoring multi-scale ionospheric dynamics: #Ionosphere in motion - a new way to track space weather in real time: https://www.eurekalert.org/news-releases/1110143

Series C, Episode 12 - Death-Watch
VILA: A few hours ago. We've plenty of time to get to the combat grounds.
TARRANT: Zen. [Looks at Avon] Yes?
AVON: Why not?
https://blake.torpidity.net/m/312/71 B7B5

Global treaty to end subsidies for destructive fishing takes effect https://news.mongabay.com/short-article/2025/10/global-treaty-to-end-subsidies-for-destructive-fishing-takes-effect/

Global treaty to end subsidies for destructive fishing takes effect
A landmark global treaty to curb billions of dollars in government subsidies for overfishing took effect on Sept. 15, Mongabay contributor Elizabeth Fitt reported. The agreement marks the first time the World Trade Organization (WTO) has approved an environmental sustainability agreement in its 30-year history. The deal came into effect after Brazil, Kenya, Tonga and […]

Light pollution: The silent threat to the planet that's easily solved #environment

Light pollution: The silent threat to the planet that's easily solved
New research has revealed for the first time the full extent of how "Artificial Light At Night" (ALAN) is increasing carbon released by plants and animals across continents—without any increase in the carbon they absorb. The result is reduced carbon storage in ecosystems—which has major implications for climate models and global carbon budgets.

Scientists shocked as bumblebees learn to read simple “Morse code” #bee

Scientists shocked as bumblebees learn to read simple “Morse code”
In a first-of-its-kind study, scientists found that bumblebees can tell the difference between short and long light flashes, much like recognizing Morse code. The insects learned which signal led to a sweet reward, demonstrating an unexpected sense of timing. This ability may stem from a fundamental neural process, suggesting that even tiny brains have complex time-tracking mechanisms relevant to evolution and AI.

EU in race against time to agree climate emissions target #EU

EU in race against time to agree climate emissions target
European diplomats are scrambling to agree on a 10-year target to cut EU carbon emissions this week, with time running out ahead of the United Nations COP30 climate summit.

Series A, Episode 04 - Time Squad
BLAKE: How long has it been registering?
JENNA: Couple of minutes. Signal's getting stronger.
BLAKE: Zen, visual detector scan and computer analysis on grid one one five, please.
https://blake.torpidity.net/m/104/48 B7B2

Most of the world has recently set all-time heat records #environment

Huge Impacts of UK Pig and Bird Farming Unveiled in Wildlife Trusts Report https://veganfta.com/articles/2025/09/11/huge-impacts-of-uk-pig-and-bird-farming-unveiled-in-wildlife-trusts-report/?utm_source=Mastod…

Huge Impacts of UK Pig and Bird Farming Unveiled in Wildlife Trusts Report
On the 29th of August 2025, a new independent report commissioned by The Wildlife Trusts unveiled for the first time the vast environmental damage caused by the UK pig and bird farming sector…

5 Surprising Phrases That Are Rooted in Animal Exploitation https://veganfta.com/blog/2025/09/12/5-surprising-phrases-that-are-rooted-in-animal-exploitation/?utm_source=Mastodon

5 Surprising Phrases That Are Rooted in Animal Exploitation
Some of our most commonly used expressions come from hunting, farming, and other forms of animal exploitation. Here are five phrases that might make you think twice the next time you drop them into…

Tell Congress: NO Funding for Primate Breeding! #AnimalRights

URGENT: Tell Congress NO to Funding Primate Breeding!
Right now, Congress is working on the 2025 federal budget, and the Senate Appropriations Committee has allocated a staggering $30 million to expand primate breeding and research at National Primate Research Centers. This funding will support invasive, unethical experiments on primates—causing unimaginable suffering while advancing unreliable science that fails over 90% of the time in human clinical trials. 🔬 Despite these facts, the NIH asked for $10 million, but the Senate has tripled th…