Tootfinder

I've been a member of the RSGS for almost 30 years and still never visited the Fair Maid's house. Maybe I should 🤔 It looks lovely...
https://mastodon.social/@Infoseepage/114751023629030656
Infoseepage@mastodon.social - Today I walked into Perth and visited the Scottish Geographic Society's digs in the Fair Maid's House.  It was, in its heyday, a sort of Scottish adventurers club. They've got an interesting reference library and an overstuffed map room. Ernest Shackleton was briefly secretary of the society and they have some of his stuff on display.

Communication-Aware Map Compression for Online Path-Planning: A Rate-Distortion Approach
Ali Reza Pedram, Evangelos Psomiadis, Dipankar Maity, Panagiotis Tsiotras
https://arxiv.org/abs/2506.20579

Communication-Aware Map Compression for Online Path-Planning: A Rate-Distortion Approach
This paper addresses the problem of collaborative navigation in an unknown environment, where two robots, referred to in the sequel as the Seeker and the Supporter, traverse the space simultaneously. The Supporter assists the Seeker by transmitting a compressed representation of its local map under bandwidth constraints to support the Seeker's path-planning task. We introduce a bit-rate metric based on the expected binary codeword length to quantify communication cost. Using this metric, we for…

The homological spectrum for monoidal triangulated categories
Daniel K. Nakano, Kent B. Vashaw, Milen T. Yakimov
https://arxiv.org/abs/2506.19946 https://

The homological spectrum for monoidal triangulated categories
The authors develop a notion of homological prime spectrum for an arbitrary monoidal triangulated category, ${\mathbf C}$. Unlike the symmetric case due to Balmer, the homological primes of ${\mathbf C}$ are not defined as the maximal Serre ideals of the small module category ${\sf mod}\text{-}{\mathbf C}$, or via a noncommutative ring theory inspired version of this construction. Instead, the authors work with an extended comparison map from the Serre prime spectrum $\operatorname{Spc} ({\sf m…

Great chart of #SEAsia's largest urban parks. Should be an national embarrassment how far down you have to scroll to find the any #city #park from one country in particular, the name of which wouldn't surprise any…

Largest urban parks in Southeast Asia
A list of the largest urban parks in Southeast Asia. Urban parks in Southeast Asia map [Map of urban parks in Southeast Asia.] Notes about the urban park list This is an ongoing list that I am coll…

As expected, @… (OpenStreetMap France) has bid to host #StateOfTheMap 2026 in #Paris, #France

On the Dark-Energy Enigma
Ali H. Chamseddine, J\"urg Fr\"ohlich
https://arxiv.org/abs/2506.21099 https://arxiv.org/pdf/2506…

On the Dark-Energy Enigma
We present a model that offers an explanation for the presence of (Dark Matter and) Dark Energy in the universe. A key idea is to express the volume form of the Lorentzian metric on space-time in terms of a positive function of a new scalar field multiplying a certain four-form given by the wedge product of the differential of the mimetic scalar field and a certain closed three-form. An ansatz for this three-form related to one commonly used to determine the winding number of a map from a three…

Deciding Robust Instances of an Escape Problem for Dynamical Systems in Euclidean Space
Eike Neumann
https://arxiv.org/abs/2506.21481 https://

Deciding Robust Instances of an Escape Problem for Dynamical Systems in Euclidean Space
We study the problem of deciding whether a point escapes a closed subset of $\mathbb{R}^d$ under the iteration of a continuous map $f \colon \mathbb{R}^d \to \mathbb{R}^d$ in the bit-model of real computation. We give a sound partial decision method for this problem which is complete in the sense that its halting set contains the halting set of all sound partial decision methods for the problem. Equivalently, our decision method terminates on all problem instances whose answer is robust under a…

Development of MR spectral analysis method robust against static magnetic field inhomogeneity
Shuki Maruyama, Hidenori Takeshima
https://arxiv.org/abs/2506.20897

Development of MR spectral analysis method robust against static magnetic field inhomogeneity
Purpose:To develop a method that enhances the accuracy of spectral analysis in the presence of static magnetic field B0 inhomogeneity. Methods:The authors proposed a new spectral analysis method utilizing a deep learning model trained on modeled spectra that consistently represent the spectral variations induced by B0 inhomogeneity. These modeled spectra were generated from the B0 map and metabolite ratios of the healthy human brain. The B0 map was divided into a patch size of subregions, and t…

I find this map especially amusing in that in 1893, 238 colonists departed Australia (purportedly nonexistent) to found the New Australia colony in Paraguay (ditto).
Of course, Australia didn’t federate till 1901, so it could be argued that Australia didn’t *actually* exist at the time. And given Paraguay’s tremendous (but still hotly contested) losses in the 1864-70 Paraguayan War, the latter country was itself hanging on by a thread.

Sometimes I'm falsely credited with discovering the North Bernal Wiggle, the low-traffic bike route up to Bernal Heights Park that avoids steeper slopes. But it was actually Brian Coyne who told me about it.

Properties of the cores and filaments in the Ophiuchus molecular cloud and its L1688 hub-filament system
Bo-Sheng Jia, Guo-Yin Zhang, Alexander Menshchikov, Sami Dib, Jin-Zeng Li, Ke Wang, Di Li, Xue-Mei Li, Zhi-Yuan Ren, Chang Zhang, Nageen Pervaiz, Lin Xiao
https://arxiv.org/abs/2506.20619…

Properties of the cores and filaments in the Ophiuchus molecular cloud and its L1688 hub-filament system
Analyzing filaments and cores in molecular clouds is key to understanding galactic star formation and its environmental dependence. This paper studies the properties and distribution of dense cores and filaments in the Ophiuchus molecular cloud, with a focus on the L1688 hub-filament system (HFS) and its star formation potential. We extracted sources and filaments from Herschel images and a 13.5 arcsec resolution surface density map using the getsf method, identified prestellar cores among the …

Morphisms on the modular curve $X_0(p)$ and degree $6$ points
Maarten Derickx, Petar Orli\'c
https://arxiv.org/abs/2506.21166 https://

Morphisms on the modular curve $X_0(p)$ and degree $6$ points
Let $p$ be a prime. We study the morphisms $f:X_0(p)_{\mathbb Q} \to Y$, where $Y/{\mathbb Q}$ is a curve of genus $\geq2$. We prove that for $p<3000$ such an $f$ must be isomorphic to the quotient map $X_0(p)\to X_0^+(p)$. This allows us to classify all points of degree $\leq 25$ on $X_0(p)$ that come from a map to some curve of genus $\geq 2$. As an application, we were able to determine all curves $X_0(p)$ with infinitely many points of degree $6$ over $\mathbb Q$, continuing the previous re…

An iterative CMB lensing estimator minimizing instrumental noise bias
Louis Legrand, Blake Sherwin, Anthony Challinor, Julien Carron, Gerrit S. Farren
https://arxiv.org/abs/2506.20667

An iterative CMB lensing estimator minimizing instrumental noise bias
Noise maps from CMB experiments are generally statistically anisotropic, due to scanning strategies, atmospheric conditions, or instrumental effects. Any mis-modeling of this complex noise can bias the reconstruction of the lensing potential and the measurement of the lensing power spectrum from the observed CMB maps. We introduce a new CMB lensing estimator based on the maximum a posteriori (MAP) reconstruction that is minimally sensitive to these instrumental noise biases. By modifying the li…

I love this map, seen at the American Museum in Bath. The creatures are closer to reality than many such maps, but still very much mythical.
Map of the Polar Regions
Theodor de Bry (1528-1598) Copperplate engraving, Frankfurt, 1601
#Art #maps

My favorite part of Uber is following the little jellybean on the map. It's like being a drone pilot except I don't get to drop a grenade on anybody.

The Crab Nebula at subarcsecond resolution with the International LOFAR Telescope
M. Arias, R. Timmerman, F. Sweijen, R. J. van Weeren, C. G. Bassa
https://arxiv.org/abs/2506.19460

The Crab Nebula at subarcsecond resolution with the International LOFAR Telescope
We present International LOw Frequency ARray (LOFAR) Telescope (ILT) observations of the Crab Nebula, the remnant of a core-collapse supernova explosion observed by astronomers in 1054. The field of the Crab Nebula was observed between 120 and 168 MHz as part of the LOFAR Two Meter Sky Survey (LoTSS), and the data were re-processed to include the LOFAR international stations to create a high angular resolution ($0.43'' \times 0.28''$) map at a central frequency of 145 MHz. Combining the ILT map…

#PhDCongratulations! 🥳 Philipp Löschl of the #IMPRS “Solar System School” has successfully defended his PhD thesis
“Science Preparation for SO/PHI: Building the First Multi-View Synoptic Map with SO/PHI and SDO/HMI”. ‪🌞
@…

On the reconstruction map in JT gravity
Chris Akers, Andrew Lucas, Amit Vikram
https://arxiv.org/abs/2506.18975 https://arxiv.org/pdf…

On the reconstruction map in JT gravity
An open question in AdS/CFT is how to reconstruct semiclassical bulk operators precisely enough that non-perturbative quantum effects can be computed. We propose a set of physically-motivated requirements for such a reconstruction map, and explicitly construct a map satisfying these requirements in Jackiw-Teitelboim (JT) gravity. Our map is found by canonically quantizing "action-angle" variables for JT gravity, which are chosen to ensure that the spectrum of the fundamental quantum theory matc…

Posterior Cram\'er-Rao Bounds on Localization and Mapping Errors in Distributed MIMO SLAM
Benjamin J. B. Deutschmann, Xuhong Li, Florian Meyer, Erik Leitinger
https://arxiv.org/abs/2506.19957

Posterior Cramér-Rao Bounds on Localization and Mapping Errors in Distributed MIMO SLAM
Radio-frequency simultaneous localization and mapping (RF-SLAM) methods jointly infer the position of mobile transmitters and receivers in wireless networks, together with a geometric map of the propagation environment. An inferred map of specular surfaces can be used to exploit non-line-of-sight components of the multipath channel to increase robustness, bypass obstructions, and improve overall communication and positioning performance. While performance bounds for user location are well estab…

Are you looking to accurately measure your organisation's current progress on the path towards digital transformation?
Take the OAV Maturity Model survey!
Developed by the Network eAcademy team of the GÉANT project, it’s designed to help #NRENs and R&E organisations assess where they are on their Orchestration, Automation, and Virtualisation (OAV) journey, and map out the next st…

Orchestration, Automation and Virtualisation (OAV) Maturity Model: a tool to assess where you are and help you reach the next level | GÉANT CONNECT Online
Words: Maria Isabel Gandia Carriedo (CSUC) and Eldis Mujaric (CARNET) Organisations with advanced capabilities in Orchestration, Automation and Virtualisation (OAV) are more likely to succeed in their path towards digital transformation. But how can the progress in these areas be accurately measured? And how can organisations identify the actions needed to drive further advancement? Maturity Models

Projective length, phantom extensions, and the structure of flat modules
Matteo Casarosa, Martino Lupini
https://arxiv.org/abs/2506.17982 https://

Projective length, phantom extensions, and the structure of flat modules
We consider the natural generalization of the notion of the order of a phantom map from the topological setting to triangulated categories. When applied to the derived category of the category of countable flat modules over a countable Dedekind domain, this yields a notion of\emph{\ phantom extension} of order $α<ω_{1}$. We provide a complexity-theoretic characterization of the module $\mathrm{Ph}% ^{α}\mathrm{Ext}\left( C,A\right) $ of phantom extensions of order $α$ with respect to the st…

OpenStreetMap doesn't have as many streets documented as Google, but we can make it a killer app by mapping what Google won't! For an easy first destination, I propose we have a group of FOSS-loving volunteers commit ritual suicide and then map ring 2 of the 7th circle of Hell in accordance with Dante's Inferno

I tried hunting POTA with five different #HamRadio antenna arrangements while taking a short holiday at the beach over the past few days. I tried the built-in antenna on my KX3, a 20m vertical with radials on a deck, the same vertical with radials stuck with a stake into the top of a sand dune, and two inverted-V 40m end-fed half wave arrangements on a spiderbeam, a north/south and an e…

The Cradle of Civilization
Assyria Babylonia Sumer Persia Elam Medes Parthian
Babylonia - Born Again
https://www.youtube.com/watch?v=5Iy4u3E6iLA
e
DIODATO - Babilonia

On the computation of tensor functions under tensor-tensor multiplications with linear maps
Jeong-Hoon Ju, Susana Lopez-Moreno
https://arxiv.org/abs/2506.18713

On the computation of tensor functions under tensor-tensor multiplications with linear maps
In this paper we study the computation of both algebraic and non-algebraic tensor functions under the tensor-tensor multiplication with linear maps. In the case of algebraic tensor functions, we prove that the asymptotic exponent of both the tensor-tensor multiplication and the tensor polynomial evaluation problem under this multiplication is the same as that of the matrix multiplication, unless the linear map is injective. As for non-algebraic functions, we define the tensor geometric mean and…

Scaling of the rotation number for perturbations of rational rotations
Paul Glendinning
https://arxiv.org/abs/2506.19508 https://arxi…

Scaling of the rotation number for perturbations of rational rotations
The parameter dependence of the rotation number in families of circle maps which are perturbations of rational rotations is described. We show that if, at a critical parameter value, the map is a (rigid) rotation $x\to x+\frac{p}{q}~({\rm mod}~1)$ with $p$ and $q$ coprime, then the rotation number is differentiable at that point provided a transversality condition holds, and hence that the rotation number scales linearly at this parameter. We provide an explicit and computable expression for th…

I am hoping to do 1,000 miles on the bike this year. It's still June and I'm at 650 (surpassing the 620 for all of 2024.) I also did 120 this month which is the most miles I've done in a single month. I am glad I started riding and try to do it daily.
#biking #bikeTooter

fly_larva: Drosophila larva brain (2023)
A complete synaptic map of the brain connectome of the larva of the fruit fly Drosophila melanogaster. Nodes are neurons, and edges are synaptic connections, traced individually from brain image sections using three-dimensional electron microscopy–based reconstruction. Node metadata include the neuron hempisphere, hemispherical homologue, cell type, annotations, and inferred cluster. Edge metadata include the type of interaction (`'aa'`,…

First images of the Sun's south pole!
Solar Orbiter is the first space probe to look at the Sun's poles – and finds the magnetic field there in a state of turmoil. The Sun's magnetic field is currently undergoing a flip. During its latest flyby of the Sun at the end of March this year, the Solar Orbiter space probe had its first clear view of our star's poles. First images:

Statistical Inference for Optimal Transport Maps: Recent Advances and Perspectives
Sivaraman Balakrishnan, Tudor Manole, Larry Wasserman
https://arxiv.org/abs/2506.19025

Statistical Inference for Optimal Transport Maps: Recent Advances and Perspectives
In many applications of optimal transport (OT), the object of primary interest is the optimal transport map. This map rearranges mass from one probability distribution to another in the most efficient way possible by minimizing a specified cost. In this paper we review recent advances in estimating and developing limit theorems for the OT map, using samples from the underlying distributions. We also review parallel lines of work that establish similar results for special cases and variants of t…

When you plot the locations of "listed" buildings in England, there's a conspicuous bald spot north of Newbury. Is there nothing worth preserving there?

From dual canonical bases to positroidal subdivisions
Jian-Rong Li, Ayush Kumar Tewari
https://arxiv.org/abs/2506.19443 https://arxiv…

From dual canonical bases to positroidal subdivisions
The Grassmannian cluster algebra $\mathbb{C}[\text{Gr}(k, n)]$ admits a distinguished basis known as the dual canonical basis, whose elements correspond to rectangular semi-standard Young tableaux with $k$ rows and with entries in $[n]$. We establish that each such tableau induces a positroidal subdivision of the hypersimplex $Δ(k,n)$ via a map introduced by Speyer and Williams. For $\text{Gr}(2,n)$, we prove that non-frozen prime tableaux correspond precisely to the coarsest positroidal subdi…

Since I did not get to take part in the Oslo Enhjulssykkelrunde (Unicycle Tour of Oslo) this year (I was busy with the kids), I decided to do my own little varient of it as part of my commute on the way into work today.
Distance 23.91km [14.86 miles], moving time 1h36m, 175m [574ft] elevation gain, average speed 14.9km/h [9.3mph]
FWIW, I actually only live about 5km [3.1 miles] from my office 🤷 😆

House prices and markets and uses of residential units:
https://www.theguardian.com/commentisfree/2025/jun/25/lisbon-europe-portugal-golden-visa-capital-investors-short-term-re…

House prices and markets and uses of residential units:
https://www.theguardian.com/commentisfree/2025/jun/25/lisbon-europe-portugal-golden-visa-capital-investors-short-term-re…

Perfect phylogenies via the Minimum Uncovering Branching problem: efficiently solvable cases
Narmina Baghirova, Esther Galby, Martin Milani\v{c}
https://arxiv.org/abs/2506.18578

Perfect phylogenies via the Minimum Uncovering Branching problem: efficiently solvable cases
In this paper, we present new efficiently solvable cases of the Minimum Uncovering Branching problem, an optimization problem with applications in cancer genomics introduced by Hujdurović, Husić, Milanič, Rizzi, and Tomescu in 2018. The problem involves a family of finite sets, and the goal is to map each non-maximal set to exactly one set that contains it, minimizing the sum of uncovered elements across all sets in the family. Hujdurović et al. formulated the problem in terms of branchings…

Nach einem Brandanschlag auf ein Umspannwerk(?) in Südfrankreich ist dort das Netz teilweise zusammengebrochen. Zeitweise waren mehr als 160k Haushalte betroffen, u.A. auch in Cannes, wo grade das gleichnamige Filmfestival stattfindet.
Spekulation: Dürfte im Bereich Poste électrique du Biançon gewesen sein. Wichtiger Knotenpunkt mit 400/225kV und nem 20MW Wasserkraftwerk (Barrage de Saint-Cassien) dran.

Thermodynamic free energy map for the non-oxidative glycolysis pathways
Adittya Pal
https://arxiv.org/abs/2506.19841 https://arxiv.or…

Thermodynamic free energy map for the non-oxidative glycolysis pathways
Designing reaction pathways that maximize the production of a target compound in a given metabolic network is a fundamental problem in systems biology. In this study, we systematically explore the non-oxidative glycolysis metabolic network, guided by the principle that reactions with negative Gibbs free energy differences are thermodynamically favored. We enumerate alternative pathways that implement the net non-oxidative glycolysis reaction, categorized by their length. Our analysis reveals se…

Oof. #OpenStreetMap minutely replication is currently broken: https://community.openstreetmap.org/t/131884
For me this means that recent edits I made are not queryable via O…

Is OSM partially down? New data isn't able to be queried on the map, and new data isn't being rendered
I’m finding that I can pull data into JOSM and iD that I know exists (due to recently pushed edits), but a query on the map doesn’t list them (not to mention that they also aren’t being rendered; however, when something’s awaiting rendering, I always, at least by my experience, can still query it). For example, this query should list building=toilets, but it doesn’t. If I edit that location in iD I can see the aforementioned feature, and I can also pull it into JOSM, but it isn’t b…

A Two-Operator Calculus for Arithmetic-Progression Paths in the Collatz Graph
Sebastian Angermund
https://arxiv.org/abs/2506.19115 https://

A Two-Operator Calculus for Arithmetic-Progression Paths in the Collatz Graph
A recast of the standard residue-class analysis of the 3x+1 (Collatz) map in terms of two elementary operators on arithmetic progressions. The resulting calculus (i) splits any progression into its even and odd subsequences in a single step, (ii) gives a closed formula for every set of seeds that realises a prescribed parity word, (iii) yields a one line affine invariant that forbids trajectories consisting of infinitely many odd moves, and (iv) reduces the non-trivial-cycle problem to a pair o…

Boggles my mind that I can, on a whim, take a day trip to see my favorite building in the world at a great price with several fast trains *per hour*. (Why on a whim? Because I never even considered it, based on the map.) Italian rail is quite something. #Italy25

Seen David Attenborough's film Ocean? Track countries' progress in signing and ratifying the High Seas Treaty, needed to protect 30% of the oceans.
https://highseasalliance.org/treaty-ratification/map/
Here's Europe:
orange = signed only,

High Seas Treaty Ratification Map
At least 60 countries must sign and ratify the High Seas Treaty for it to become international law. Follow progress and see who has signed and ratify the treaty on the world map.

The nanoscale molecular chemistry of outer solar system organic matter in asteroid Ryugu
Christian Vollmer, Demie Kepaptsoglou, Johannes Lier, Aleksander B. Mosberg, Quentin M. Ramasse
https://arxiv.org/abs/2506.16798

The nanoscale molecular chemistry of outer solar system organic matter in asteroid Ryugu
The analysis of biorelevant molecules in returned mission samples such as from the carbonaceous asteroid (162173) Ryugu is key to unravelling the role of extraterrestrial organics in the evolution of life. Coordinated analyses using minimally destructive techniques at the finest length-scales on pristine samples are particularly important. Here, we identify the chemical signature of unique globular and nitrogen-containing diffuse organic matter in asteroid Ryugu and map the distribution of thes…

Bedrock Ocean, which has developed an autonomous underwater vehicle to map the ocean floor using sonar and magnetic sensors, raised a $25M Series A-2 (Tim De Chant/TechCrunch)
https://techcrunch.com/2025/06/10/bedrock-ocean-dredges-u…

Exclusive: Bedrock Ocean dredges up $25M to map the seafloor with robots | TechCrunch
Bedrock Ocean wants to use autonomous underwater vehicles to make mapping the seafloor faster and cheaper.

Point Cloud Environment-Based Channel Knowledge Map Construction
Yancheng Wang, Wei Guo, Guanying Chen, Ye Zhang, Shuguang Cui
https://arxiv.org/abs/2506.21112

Point Cloud Environment-Based Channel Knowledge Map Construction
Channel knowledge map (CKM) provides certain levels of channel state information (CSI) for an area of interest, serving as a critical enabler for environment-aware communications by reducing the overhead of frequent CSI acquisition. However, existing CKM construction schemes adopt over-simplified environment information, which significantly compromises their accuracy. To address this issue, this work proposes a joint model- and data-driven approach to construct CKM by leveraging point cloud env…

Mapping the gas density with the kinematic Sunyaev-Zel'dovich and patchy screening effects: a self-consistent comparison
Boryana Hadzhiyska, Noah Sailer, Simone Ferraro
https://arxiv.org/abs/2506.17379

Mapping the gas density with the kinematic Sunyaev-Zel'dovich and patchy screening effects: a self-consistent comparison
The secondary anisotropies of the cosmic microwave background (CMB) provide a wealth of astrophysical and cosmological information. Pairing measurements of the CMB temperature map obtained by DR5 of the Atacama Cosmology Telescope (ACT) with the large-scale structure imaging survey conducted by the Dark Energy Spectroscopic Instrument, DECaLS DR9, we investigate two effects that are sensitive to the gas density $τ$: kinematic Sunyaev-Zel'dovich (kSZ) and `patchy screening' (also known as `anis…

Sequence-to-Sequence Models with Attention Mechanistically Map to the Architecture of Human Memory Search
Nikolaus Salvatore, Qiong Zhang
https://arxiv.org/abs/2506.17424

Sequence-to-Sequence Models with Attention Mechanistically Map to the Architecture of Human Memory Search
Past work has long recognized the important role of context in guiding how humans search their memory. While context-based memory models can explain many memory phenomena, it remains unclear why humans develop such architectures over possible alternatives in the first place. In this work, we demonstrate that foundational architectures in neural machine translation -- specifically, recurrent neural network (RNN)-based sequence-to-sequence models with attention -- exhibit mechanisms that directly…

Did a trip to admire the ”Prague Semmering” https://en.m.wikipedia.org/wiki/Smíchov–Hostivice_railway_line from the ground, a regional railway line with impressive curved viaducts to manage the height difference up to the hills above Smíchov station and the pla…

Smíchov–Hostivice railway line - Wikipedia

Geometry of Chord Intertwiner, Multiple Shocks and Switchback in Double-Scaled SYK
Sergio E. Aguilar-Gutierrez, Jiuci Xu
https://arxiv.org/abs/2506.19013 h…

Geometry of Chord Intertwiner, Multiple Shocks and Switchback in Double-Scaled SYK
We revisit the bulk Hilbert space interpretation of chords in the double-scaled SYK (DSSYK) model and introduce a notion of intertwiner that constructs bulk states from states with fixed boundary conditions. This leads to an isometric map that factorizes the one-particle bulk Hilbert space into a tensor product of two boundary Hilbert spaces without particle insertion. The map enables a systematic derivation of a family of correlation functions with arbitrary finite amount of matter insertions,…

(x-post FB, original post at https://www.facebook.com/wesarkitsap/posts/pfbid02S2z7MXFpJaAvePFYEEC9EuhX8dzgGkVMYmKooRsW5XnV7DQwhN3wfm16K7i1f1ZVl)
Our Suquamish subject was safely located and extracted! …

Done mapping all 15 #barangays of Bien Unido, Bohol, #Philippines 🇵🇭 in #OpenStreetMap, updating their #Wikidata

Radio Galaxy Zoo: EMU -- paving the way for EMU cataloging using AI and citizen science
Hongming Tang, Eleni Vardoulaki, RGZ EMU collaboration
https://arxiv.org/abs/2506.16138

Radio Galaxy Zoo: EMU -- paving the way for EMU cataloging using AI and citizen science
The Evolutionary Map of the Universe (EMU) survey with ASKAP is transforming our understanding of radio galaxies, AGN duty cycles, and cosmic structure. EMUCAT efficiently identifies compact radio sources, yet struggles with extended objects, requiring alternative approaches. The Radio Galaxy Zoo: EMU (RGZ EMU) project proposes a general framework that combines citizen science and machine learning to identify around 4 million extended sources in EMU. This framework is expected to enhance the EM…

What can I use to make this? Hopefully easily (as in, the lines all move in a group if I need to reposition), but honestly I don't care if not — I just want it to know about curves and gaps, positioning nicely by default.
#maps #diagram

De Bruijn Tori Without Zeros: A Field-Theoretic Perspective
Ming Hsuan Kang, Yu Hsuan Hsieh
https://arxiv.org/abs/2506.19605 https://…

De Bruijn Tori Without Zeros: A Field-Theoretic Perspective
We present an algebraic construction of trace-based De Bruijn tori over finite fields, focusing on the nonzero variant that omits the all-zero pattern. The construction arranges nonzero field elements on a toroidal grid using two multiplicatively independent generators, with values obtained by applying a fixed linear map, typically the field trace. We characterize sampling patterns as subsets whose associated field elements form an \( \mathbb{F}_p \)-basis, and show that column structures cor…

#Drumpf admin announces "temporary" closure of 60,000 acres of #BlackRock desert in #Nevada around area where #BurningMan takes place…

Black Rock Field Office | Bureau of Land Management
Contact your local field office for questions related to permits, regulations, access, and ways you can get involved. The Black Rock Field Office, a sub-part of the Winnemucca District Office, carries out the local operations of land management. In most cases, these local offices will provide the best information about how we manage your public lands.

Compression Maps Between Polytopes
Jos\'e Ayala, David Kirszenblat, J. Hyam Rubinstein
https://arxiv.org/abs/2506.18534 https://a…

Compression Maps Between Polytopes
A shape of a combinatorial polytope is a convex embedding into Euclidean space. We provide necessary and sufficient conditions for a piecewise linear map between two shapes of the same polytope to be a compression (respectively a weak compression), meaning a distance decreasing (respectively a distance non-increasing) map between distinct pairs of points. We establish that there is a partial order on the space of shapes given by the relation of having a weak compression map between pairs of sha…

We in Game Workers Unite Ireland stand in solidarity with Animation Workers of Ireland, and the international trade union coalition happening to organise against the threat of AI in the animation industry, and we support their call to acton.
Join them Thursday 12 June at 14:00 at the Pâquier in Annecy!!
#Animation

People in #Finland will queue for anything. Even to take a quiz about the #EU!
#WorldVillageFestival #MaailmaKylässäFestivaali

Defining the Game Producer: A Mapping of Key Characteristics and Differentiators of the Professional Behind Digital Game Production
Rafael C. Lopes, Danilo M. Ribeiro
https://arxiv.org/abs/2506.14409

Defining the Game Producer: A Mapping of Key Characteristics and Differentiators of the Professional Behind Digital Game Production
Introduction: As digital games grow in complexity, the role of the Game Producer becomes increasingly relevant for aligning creative, technical, and business dimensions. Objective: This study aimed to identify and map the main characteristics, skills, and competencies that define the Digital Game Producer profile. Methodology: A qualitative investigation was conducted with 11 semi-structured interviews, analyzed through Grounded Theory to build categories grounded in professional practice. Resu…

IT'S PRIDE MONTH, SSR!! We will be riding slow as usual, meeting new people, and enjoying an educational tour of some historical queer sites between the Castro, Mission, and SOMA.
Start Location: Dolores Park, 19th Street
Meetup: 10:30am Saturday, June 28th
Rollout: 11:00am

CURL-SLAM: Continuous and Compact LiDAR Mapping
Kaicheng Zhang, Shida Xu, Yining Ding, Xianwen Kong, Sen Wang
https://arxiv.org/abs/2506.21077 https://

CURL-SLAM: Continuous and Compact LiDAR Mapping
This paper studies 3D LiDAR mapping with a focus on developing an updatable and localizable map representation that enables continuity, compactness and consistency in 3D maps. Traditional LiDAR Simultaneous Localization and Mapping (SLAM) systems often rely on 3D point cloud maps, which typically require extensive storage to preserve structural details in large-scale environments. In this paper, we propose a novel paradigm for LiDAR SLAM by leveraging the Continuous and Ultra-compact Representa…

On the stability of the generalized equator map
Volker Branding, Anna Siffert
https://arxiv.org/abs/2506.10652 https://arxiv.org/pdf/…

On the stability of the generalized equator map
The energy, the $p$-energy ($p\in\mathbb{R}$ with $p\geq 2$) and the extrinsic $k$-energy ($k\in\mathbb{N}$) for maps between Riemannian manifolds are central objects in the geometric calculus of variations. The equator map from the unit ball to the Euclidean sphere provides an explicit critical point of all aforementioned energy functionals. During the last four decades many researchers studied the stability of this particular map when considered as a critical point of one of these energy func…

The presentations at the 2nd #AAS246 presser were about the papers https://iopscience.iop.org/article/10.3847/2041-8213/adc911 (Discovery of the Seven-ring Polycyclic Aromatic Hydrocarbon Cyanocoronene (C24H11CN) in GOTHAM Observations of TMC-1, also https://public.nrao.edu/news/cosmic-chemistry-breakthrough-largest-aromatic-molecule-found-in-deep-space/), https://arxiv.org/abs/2506.05575 (A map of the outer gas disk of the Galaxy with direct distances from young stars, also https://www.uah.edu/news/items/uah-researcher-unveils-new-map-of-milky-way-galaxy-in-atomic-hydrogen-revealing-its-clumped-flocculent-nature-for-first-time) and https://iopscience.iop.org/article/10.3847/1538-4357/adbbd9 (Surveying the Giant H ii Regions of the Milky Way with SOFIA. VII. Galactic Center Regions Sgr B1, Sgr B2, and Sgr C, also https://www.seti.org/press-release/unusual-stellar-nurseries-near-our-galaxys-center-puzzle-scientists) plus two results with apparently neither papers nor press releases going with them.

From 600 Tools to 1 Console: A UX-Driven Transformation
Mariann Kornelia Smith, Jacqueline Meijer-Irons, Andrew Millar
https://arxiv.org/abs/2506.16107 htt…

From 600 Tools to 1 Console: A UX-Driven Transformation
In 2021 the Technical Infrastructure (TI) User Experience (UX) team sent a survey to 10,000 Google Developers (Googlers) and uncovered that Google's internal infrastructure tools were fragmented and inefficient, hindering developers' productivity. Using user centered research and design methodologies the team first created a story map and service blueprint to visualize the relationship between internal applications, then formulated a strategic vision to consolidate tools, streamline workflows, …

Ahoy, matey!
If ye hold the map to Dollface and cherish the wild waves of the digital sea, then hoist the sails and bring others aboard this vessel.
-IMDb:
https://www.imdb.com/title/tt7661046/
- btdig:

Today's bike ride was 8 miles but whatever the crazy thing is that I saw a guy get chased off the Menomonee River Parkway by a turkey! It chased him into the road, and he was running down the middle of the road and a car had to stop!
#bikeTooter #turkey

Wikipedia has a population density map for Merrimack County now, and I just want to say how proud I am of how sharp the contrast is between the red and green areas in Concord: https://en.wikipedia.org/wiki/File:Merrimack_County_population_density.png
(Bow is a bit of a problem, though)

Series A, Episode 13 - Orac
BLAKE: No, we'd end up looking for each other as well as Orac and Ensor. Come on.
[Scene: Travis and Servalan still in the tunnels.]
TRAVIS: Let's check the map.
SERVALAN: We're almost there.
https://blake.torpidity.net/m/113/241

Blakes7Bot | Search
Companion site to the Blakes7Bot Twitter, Mastodon, and Bluesky accounts. Automated lines of Blakes 7 dialog. Includes a script search facility.

Automatic Generation of Explicit Quadratic Programming Solvers
Maximilian Schaller, Daniel Arnstr\"om, Alberto Bemporad, Stephen Boyd
https://arxiv.org/abs/2506.11513

Automatic Generation of Explicit Quadratic Programming Solvers
We consider a family of convex quadratic programs in which the coefficients of the linear objective term and the righthand side of the constraints are affine functions of a parameter. It is well known that the solution of such a parametrized quadratic program is a piecewise affine function of the parameter. The number of (polyhedral) regions in the solution map can grow exponentially in problem size, but when the number of regions is moderate, a so-called explicit solver is practical. Such a so…

Pivotal moments in US history shaped by confrontational street protest include:
– Unionization of the auto industry 1936
– Passing the Fair Housing Act 1968
– Ending the US invasion of Cambodia 1970

Going to #NoKings Saturday? Try to recruit the newly radicalizing to defunding the police, to defending all in our communities facing displacement—immigrant, queer, unhoused, unable to pay rent—in short, to fighting local fascisms, so we can better fight national fascism, at ICE centers

Immigration Detention Map — Freedom for Immigrants
Map of U.S. Immigration Detention

Choosing iteration maps for the parallel Pollard rho method
Finn Rudolph
https://arxiv.org/abs/2506.12844 https://arxiv.org/pdf/2506.…

Choosing iteration maps for the parallel Pollard rho method
Pollard's rho method finds a prime factor $p$ of an integer $N$ by searching for a collision in a map of the form $x \mapsto x^{2k} + c$ modulo $N$. This search can be parallelized to multiple machines, which may use distinct parameters $k$ and $c$. In this paper, we give an asymptotic estimate for the expected running time of the parallel rho method depending on the choice of $k$ for each machine. We also prove that $k = 1$ is the best choice for one machine, if nothing about $p$ is known in a…

"What Can We Learn From Open Access Journals in the Arab States?" @ Katina Magazine: https://katinamagazine.org/content/article/open-knowledge/2025/open-access-journals-arab-states
"In the 22 Arab states,

Amsterdam is celebrating its 750th anniversary. Tomorrow, this will be celebrated with activities on a large section of the ring road: for one day, there will be a bit more city for people and less for cars. Hopefully, this will be an appetiser for more.
https://opdering.amsterdam/en/

Plateau Sigma – The Great Reset EP
#byncnd

Supernova explosions of runaway stars and young neutron stars above the Galactic plane
Vinka Daki\'c, Sergei B. Popov, Roberto Turolla
https://arxiv.org/abs/2506.13660

Supernova explosions of runaway stars and young neutron stars above the Galactic plane
Several supernova remnants and young neutron stars were recently discovered relatively high above the Galactic plane. One possibility is that they originate from runaway OB stars born in the Galactic disk. Understanding their origin will provide key insights into the properties of the Galactic halo. This paper aims to determine the spatial distribution of supernova explosions from runaway OB stars and to assess whether this model can explain certain observed neutron stars. We map the distributi…

Hey @… - I had a couple of mapping nerds (I include myself in that category) ask about how the hexagon electoral map is created. Is there an explanation anywhere? Loved it in https://www.

Where the election will be won and lost — or maybe left hanging
The electoral maths on Saturday seems simple — win 76 seats and you win government. But that's not all there is to it.

B.C. cyclist's clever Strava drawings:
"Perfect intersection' of art, fitness and road rash
When B.C.'s Janine Strong got into road cycling in 2019, she had no idea it would lead her down the path of Strava art: the creation of massive GPS-tracked sketches around the world."
See Ya later Alligator
#stava

out today: the #GratefulDead's new 60-CD "enjoying the ride" box. i wrote a ton of liner notes for this, including mini-essays about all the shows & venues, tour lore, & many maps. play with an interactive map: https://tmns.dead.n…

Take a trip to the fantastical land of the Grateful Dead
Follow the Heady Highway to discover storied venues that hosted legendary live performances by the Dead from shows spanning 25 years

Me (to myself): Get in to work early this morning, with no messing about on the way in. Just 'a to b', fast and efficient!
Also me: [Leaves very late, grabs a unicycle and proceeds to cycling in via the following route]
🤷
https://www.strava.com/activities/14824892

In the Netherlands, we just experienced the warmest night on record, for this early in the year. With a low temperature of 19.1°C in De Bilt, it was just shy of the warmest June night, 24-25 June 2019 (low 19.5°C).

Laurel, which uses AI to map how workers spend time by integrating with tools like Slack and Outlook, raised a $100M Series C led by IVP at a $510M valuation (Allie Garfinkle/Fortune)
https://fortune.com/2025/06/10/exclusive-laurel-r…

Exclusive: Laurel raises $100 Series C to map where the time goes
Laurel has raised a $100 million Series C led by IVP, Fortune has exclusively learned. The deal values the startup at $510 million.

Idly wondered if there are any carolean post boxes, and a search of OSM suggests there's at least eight.
https://overpass-turbo.eu/s/24R8

A stylized map of #Manila, #Philippines 🇵🇭 on the wall at the Sheraton Manila Bay's restaurant.
#MapsInTheWild

wiki_science: Wikipedia Map of Science (2020)
A network of scientific fields, extracted from the English Wikipedia in early 2020. Nodes are wikipedia pages representing natural, formal, social and applied sciences, and two nodes are linked if the cosine similarity of the page content is above a threshold. See <http://www.s…

Getting ready for tomorrow's #ClimateClassic: road cycling tour of 250 km, from @… in De Bilt to Groningen, along the 1-metre-above-sealevel line. In our special #ShowYourClimateStripes

See What I Mean? Expressiveness and Clarity in Robot Display Design
Matthew Ebisu, Hang Yu, Reuben Aronson, Elaine Short
https://arxiv.org/abs/2506.16643 h…

See What I Mean? Expressiveness and Clarity in Robot Display Design
Nonverbal visual symbols and displays play an important role in communication when humans and robots work collaboratively. However, few studies have investigated how different types of non-verbal cues affect objective task performance, especially in a dynamic environment that requires real time decision-making. In this work, we designed a collaborative navigation task where the user and the robot only had partial information about the map on each end and thus the users were forced to communicat…

Characterization of fiberwise bimeromorphism and specialization of bimeromorphic types I: the non-negative Kodaira dimension case
Jian Chen, Sheng Rao, I-Hsun Tsai
https://arxiv.org/abs/2506.12670

Characterization of fiberwise bimeromorphism and specialization of bimeromorphic types I: the non-negative Kodaira dimension case
Inspired by the recent works of M. Kontsevich--Y. Tschinkel and J. Nicaise--J. C. Ottem on specialization of birational types for smooth families (in the scheme category) and J. Koll{á}r's work on fiberwise bimeromorphism, we focus on characterizing the fiberwise bimeromorphism and utilizing the characterization to investigate the specialization of bimeromorphic types for non-smooth families in the complex analytic setting. We provide some criteria for a bimeromorphic map between two families …

Some global properties of umbilic points of Willmore immersions in the $3$-sphere
Nicolas Marque, Dorian Martino
https://arxiv.org/abs/2506.10720 https://

Some global properties of umbilic points of Willmore immersions in the $3$-sphere
We study the umbilic points of Willmore surfaces in codimension 1 from the viewpoint of the conformal Gauss map. We first study the local behaviour of the conformal Gauss map near umbilic curves and prove that they are geodesics up to a conformal transformation if and only if the Willmore immersion is, up to a conformal transformation, the gluing of minimal surfaces in the 3-dimensional hyperbolic space. Then, we prove a Gauss--Bonnet formula for the conformal Gauss map of Willmore surfaces whi…

Wiggle Fest Slow Ride!
Sunday April 13th wiggle along some slow streets!
Meet at Balboa Park 12pm, Roll @ 12:30
Bike along Cayuga stopping at Palega Rec Center, then to Herons Head Park, and finally thru the Mission to Duboce park and Wiggle Fest.
More info: https://www.safestreetreb…

Earlier this month, #TomPatterson released a free (public domain) print-quality physical map of maritime Southeast Asia. It could actually almost double as a map of SEA except the northern part of Myanmar is cut off. 🗺️
https://

Openreach (who operates a big chunk of internet access in the UK) collects a lot of data about end-user internet use and can generate press releases based on analysis of it.
This is like an advert for VPNs.
https://www.openreach.com/news/how-do-you-

How do you broadband? Openreach reveals UK hotspot map
Whether it’s online shopping, gaming or TV super streaming, your most likely broadband habits depend on where you live in the UK, Openreach reveals today.In the first research of its kind to mark 25 years of home broadband in the UK, Openreach, has combined its own data with extensive consumer research to map the UK cities by their online acti...

wiki_science: Wikipedia Map of Science (2020)
A network of scientific fields, extracted from the English Wikipedia in early 2020. Nodes are wikipedia pages representing natural, formal, social and applied sciences, and two nodes are linked if the cosine similarity of the page content is above a threshold. See <http://www.s…

Peak algebra in noncommuting variables
Farid Aliniaeifard, Shu Xiao Li
https://arxiv.org/abs/2506.12868 https://arxiv.org/pdf/2506.12…

Peak algebra in noncommuting variables
The well-known descent-to-peak map $Θ_{\mathrm{QSym}}$ for the Hopf algebra of quasisymmetric functions, $\mathrm{QSym}$, and the peak algebra $Π$ were originally defined by Stembridge in 1997. We define the labelled descent-to-peak map $Θ_{\mathrm{NCQSym}}$ and extend the notion of the peak algebra to noncommuting variables. Moreover, we define Schur $Q$-functions in noncommuting variables having properties analogous to the classical Schur $Q$-functions.

Milwaukee Bike Map Hub
"Track the progress of protected bikeways, plan your bike route through the city, and view existing bike infrastructure maps..."
There's also a bike rack locator, a "low stress" bike map, and other useful info.
https://storymaps.arcgis.co…

Milwaukee Bike Map Hub
Track the progress of protected bikeways, plan your bike route through the city, and view existing bike infrastructure maps

Chow cohomology and Lefschetz (1,1)-theorem
Ananyo Dan, Inder Kaur
https://arxiv.org/abs/2506.13220 https://arxiv.org/pdf/2506.13220

Chow cohomology and Lefschetz (1,1)-theorem
Any smooth, projective variety satisfies the Hodge conjecture in codimension one, known as the Lefschetz (1,1) theorem. Totaro formulated a version for singular varieties. He asked whether the natural Bloch-Gillet-Soulé cycle class map from the operational Chow group to the (1,1)-classes in the weight graded piece of the cohomology group is surjective? In this short article, we give a sufficient criterion for this to hold. In particular, we show that several singular varieties with at worst is…

The mirror map and other natural tangent tensors
R. Albuquerque
https://arxiv.org/abs/2506.10881 https://arxiv.org/pdf/2506.10881

The mirror map and other natural tangent tensors
We review the intrinsic geometry of the tangent bundle of a differentiable manifold $M$, aside from any non-natural structures. We recall the properties of the mirror map $B\in\mathrm{End}(TTM)$, known also as the canonical endomorphism or the almost-tangent structure, solve some cohomological questions and raise other induced by the $\mathrm{d}_B$ operator.

Another hole in the Flightradar map.

NASA: May 2025 was the 2nd warmest May on record, globally: 1.07°C above the 1951-1980 average. Only May 2024 was warmer.
Highest anomalies in the Siberian Arctic, Central Asia, and the West-Antarctic.
#globalwarming #ClimateChange