Tootfinder

An interesting write up of an interview with the Edinburgh Spokes cycle campaign.
"Spokes also started producing cycle maps at that point [in the 80s]. Partly you produce a cycle map to show people where the nice places are, whether it's off road routes, quiet streets or whatever, to just show them that it is possible."
"But it's also a campaigning tool, because the map shows you the gaps."

"If your campaigning doesn't generate a response, you're not being radical enough": Active travel campaigners Spokes on making spaces bike friendly
road.cc chat with the organisation as they release their new cycle map of West Lothian and discuss meaningful cycle campaigning after nearly 50 years

Domain Translation of a Soft Robotic Arm using Conditional Cycle Generative Adversarial Network
Nilay Kushawaha, Carlo Alessi, Lorenzo Fruzzetti, Egidio Falotico
https://arxiv.org/abs/2508.14100

Domain Translation of a Soft Robotic Arm using Conditional Cycle Generative Adversarial Network
Deep learning provides a powerful method for modeling the dynamics of soft robots, offering advantages over traditional analytical approaches that require precise knowledge of the robot's structure, material properties, and other physical characteristics. Given the inherent complexity and non-linearity of these systems, extracting such details can be challenging. The mappings learned in one domain cannot be directly transferred to another domain with different physical properties. This challeng…

Inside Google's Reliability Labs, where it stress tests Pixel phones and watches; Google claims the Pixel 10 Pro Fold can withstand 10 years of folding (Julian Chokkattu/Wired)
https://www.wired.com/story/google-reliability-labs-exclusive-look/

An Exclusive Look at Reliability Labs, Where Google Stress Tests Pixel Hardware
Google runs an array of tests on its Pixel phones and smartwatches throughout the development cycle. Here's a peek behind the curtain of what that testing looks like.

Linearly-polarized few-cycle pulses drive carrier envelope phase-sensitive coherent magnetization injection
Ofer Neufeld
https://arxiv.org/abs/2507.15490 h…

Linearly-polarized few-cycle pulses drive carrier envelope phase-sensitive coherent magnetization injection
Circularly-polarized light is well-known to induce, or flip the direction of, magnetization in solids. At its heart, this arises from time-reversal symmetry breaking by the vector potential, causing inverse-Faraday or analogous physical effects. We show here that very short few-cycle pulses can cause similar phenomena even when they are linearly-polarized and off-resonant. We analyze the new effect with ab-initio calculations and demonstrate that it similarly arises due to broken time-reversal …

WTF is a Dive Cycle. this sucks.

Through-the-Cycle PD Estimation Under Incomplete Data -- A Single Risk Factor Approach
Barbara D\"om\"ot\"or, Ferenc Ill\'es
https://arxiv.org/abs/2508.15651 …

Through-the-Cycle PD Estimation Under Incomplete Data -- A Single Risk Factor Approach
Banks are required to use long-term default probabilities (PDs) of their portfolios when calculating credit risk capital under internal ratings-based (IRB) models. However, the calibration models and historical data typically reflect prevailing market conditions. According to Basel recommendations, averaging annual PDs over a full economic cycle should yield the long-term PD. In practice, the available data are often temporally incomplete - even for high-risk portfolios. In this paper, we prese…

I think I said this when we ended up with Cheer cheese. https://mstdn.social/@alanpringle/115071998459121943

Some Lagrangian quiver Grassmannians for the equioriented cycle
Matteo Micheli
https://arxiv.org/abs/2507.15841 https://arxiv.org/pdf…

Some Lagrangian quiver Grassmannians for the equioriented cycle
The goal of this paper is to better understand a family of linear degenerations of the classical Lagrangian Grassmannians $Λ(2n)$. It is the special case for $k=n$ of the varieties $X(k,2n)^{sp}$, introduced in previous joint work with Evgeny Feigin, Martina Lanini and Alexander Pütz. These varieties are obtained as isotropic subvarieties of a family of quiver Grassmannians $X(n,2n)$, and are acted on by a linear degeneration of the algebraic group $Sp_{2n}$. We prove a conjecture proposed in…

The effect of poloidal magnetic field and helicity injection on a breakout CME
Nitin Vashishtha, Vaibhav Pant, Dana-Camelia Talpeanu, Dipankar Banerjee, Shantanu Rastogi
https://arxiv.org/abs/2508.13835

The effect of poloidal magnetic field and helicity injection on a breakout CME
Coronal mass ejections (CMEs), as crucial drivers of space weather, necessitate a comprehensive understanding of their initiation and evolution in the solar corona, in order to better predict their propagation. Solar Cycle 24 exhibited lower sunspot numbers compared to Solar Cycle 23, along with a decrease in the heliospheric magnetic pressure. Consequently, a higher frequency of weak CMEs was observed during Solar Cycle 24. Forecasting CMEs is vital, and various methods, primarily involving th…

Breaking the Cycle of Incarceration With Targeted Mental Health Outreach: A Case Study in Machine Learning for Public Policy
Kit T. Rodolfa, Erika Salomon, Jin Yao, Steve Yoder, Robert Sullivan, Kevin McGuire, Allie Dickinson, Rob MacDougall, Brian Seidler, Christina Sung, Claire Herdeman, Rayid Ghani
https://arxiv.org/abs/2509.14129

Breaking the Cycle of Incarceration With Targeted Mental Health Outreach: A Case Study in Machine Learning for Public Policy
Many incarcerated individuals face significant and complex challenges, including mental illness, substance dependence, and homelessness, yet jails and prisons are often poorly equipped to address these needs. With little support from the existing criminal justice system, these needs can remain untreated and worsen, often leading to further offenses and a cycle of incarceration with adverse outcomes both for the individual and for public safety, with particularly large impacts on communities of …

So, @… -
This old cartoon came across another platform and I realized it's probably canon in your line of work.

Cycle of Creativity – Inspire, Create, Rest, Repeat #creativity #inspiration https://muz4now.com/2023/cy…

Cycle of Creativity - Inspire, Create, Rest, Repeat
Stan Stewart - @muz4now

Odd list-coloring of graphs of small Euler genus with no short cycles of specific types
Rishi Balaji, Victoria Khazhinsky, Chun-Hung Liu, Kevin Qin
https://arxiv.org/abs/2508.15255

Odd list-coloring of graphs of small Euler genus with no short cycles of specific types
Odd coloring is a variant of proper coloring and has received wide attention. We study the list-coloring version of this notion in this paper. We prove that if $G$ is a graph embeddable in the torus or the Klein bottle with no cycle of length 3, 4, and 6 such that no 5-cycles share an edge, then for every function $L$ that assigns each vertex of $G$ a set $L(v)$ of size 5, there exists a proper coloring that assigns each vertex $v$ of $G$ an element of $L(v)$ such that for every non-isolated ve…

Weekend #Plankton Factoid 🦠🦐
Meroplankton is a grouping of "temporary zooplankton" that only spend a portion of their life cycle there. One example is the nauplius larvae of barnacles. Though they don't look like it, barnacles are crustaceans, so they have nauplius stage for dispersal. They have very distinctive "horns" and are extremely common in plankton samples, wh…

Deep Learning for Short Term Equity Trend Forecasting: A Behavior Driven Multi Factor Approach
Yuqi Luan
https://arxiv.org/abs/2508.14656 https://arxiv.org…

Deep Learning for Short Term Equity Trend Forecasting: A Behavior Driven Multi Factor Approach
This study proposes a behaviorally-informed multi-factor stock selection framework that integrates short-cycle technical alpha signals with deep learning. We design a dual-task multilayer perceptron (MLP) that jointly predicts five-day future returns and directional price movements, thereby capturing nonlinear market behaviors such as volume-price divergence, momentum-driven herding, and bottom reversals. The model is trained on 40 carefully constructed factors derived from price-volume pattern…

Earlier talks at #CloudAustin #DogDaysOfDevOps: Using Groq (not Grok) rather than other AI inference, upskilling via AWS certs, an intro to OpenTelemetry, a primer on when to vibe code in the software development life cycle, another AI prognostication talk, a "why I'm planning to build …

SpeedLLM: An FPGA Co-design of Large Language Model Inference Accelerator
Peipei Wang, Wu Guan, Liping Liang, Zhijun Wang, Hanqing Luo, Zhibin Zhang
https://arxiv.org/abs/2507.14139

SpeedLLM: An FPGA Co-design of Large Language Model Inference Accelerator
This paper introduces SpeedLLM, a neural network accelerator designed on the Xilinx Alevo U280 platform and optimized for the Tinyllama framework to enhance edge computing performance. Key innovations include data stream parallelism, a memory reuse strategy, and Llama2 operator fusion, which collectively reduce latency and energy consumption. SpeedLLM's data pipeline architecture optimizes the read-compute-write cycle, while the memory strategy minimizes FPGA resource demands. The operator fusi…

A Data-Based Review of Battery Electric Vehicle and Traction Inverter Trends
Christoph Sachs, Martin Neuburger
https://arxiv.org/abs/2508.14224 https://arx…

A Data-Based Review of Battery Electric Vehicle and Traction Inverter Trends
Battery electric vehicles (BEVs) have advanced significantly during the past decade, yet drivetrain energy losses continue to restrict practical range and elevate cost. A dataset comprising more than 1000 European-market BEVs (model years 2010-2025) is combined with detailed inverter-motor co-simulation to chart technology progress for and quantify the efficiency and cost-saving potential of partial-load optimised multi-level inverter (MLI) for 2030. Average drive-cycle range has climbed from 1…

On the vector potential formulation with an energy-based hysteresis model and its numerical solution
Herbert Egger, Felix Engertsberger
https://arxiv.org/abs/2507.14521

On the vector potential formulation with an energy-based hysteresis model and its numerical solution
The accurate modelling and simulation of electric devices involving ferromagnetic materials requires the appropriate consideration of magnetic hysteresis. We discuss the systematic incorporation of the energy-based vector hysteresis model of Henrotte et al. into vector potential formulations for the governing magnetic field equations. The field model describing a single step in a load cycle is phrased as a convex minimization problem which allows us to establish existence and uniqueness of solu…

Brian Callahan's quick flameout continues the Titans' stunning three-year cycle of chaos. Now what?

https://www.cbssports.com/nfl/news/brian-c

“Service academies to accept conservative alternative to SAT and ACT”
And it is called the CLT?
They’ll have to find it first.
Hey oh!
https://www.politico.com/news/2025/09/15/military-academies-clt-standardized-test-00564290…

Oil Peak and the Decline of Net Energy: Policy Implications from an EROI-Entropy Perspective
Shunsuke Nakaya, Jun Matsushima
https://arxiv.org/abs/2509.15252 https://

Oil Peak and the Decline of Net Energy: Policy Implications from an EROI-Entropy Perspective
Net energy - the energy obtained from a resource after accounting for the energy expended in its acquisition - fundamentally determines the capacity of societies to sustain and expand. The extended Energy Return on Investment (EROIext) incorporates not only extraction and refining but also transport and end-use infrastructure, yet its long-term dynamics remain poorly understood. Here, we apply a Single-Cycle Lotka-Volterra (SCLV) model to the global petroleum system, calibrated with historical …

Accelerating Garfield with CUDA
T. Neep, K. Nikolopoulos, M. Slater
https://arxiv.org/abs/2509.15377 https://arxiv.org/pdf/2509.15377

Accelerating Garfield++ with CUDA
Garfield++ is extensively used within the gaseous detector community for comprehensive detector simulations, supporting the full experimental life cycle from design to operation and calibration. The emergence of micro-pattern gaseous detectors has necessitated computationally intensive microscopic avalanche simulations. The acceleration of one of Garfield++'s most demanding algorithms, AvalancheMicroscopic, by porting it to graphics processing units using NVIDIA's CUDA framework is described. T…

Inspired by machine learning optimization: can gradient-based optimizers solve cycle skipping in full waveform inversion given sufficient iterations?
Xinru Mu, Omar M. Saad, Shaowen Wang, Tariq Alkhalifah
https://arxiv.org/abs/2509.14919

Inspired by machine learning optimization: can gradient-based optimizers solve cycle skipping in full waveform inversion given sufficient iterations?
Full waveform inversion (FWI) iteratively updates the velocity model by minimizing the difference between observed and simulated data. Due to the high computational cost and memory requirements associated with global optimization algorithms, FWI is typically implemented using local optimization methods. However, when the initial velocity model is inaccurate and low-frequency seismic data (e.g., below 3 Hz) are absent, the mismatch between simulated and observed data may exceed half a cycle, a p…

Synchronization driven acoustics: The nonlinear scattering of a self-oscillating meta-atom
Alexander K. Stoychev, Xinxin Guo, Ulrich Kuhl, Nicolas Noiray
https://arxiv.org/abs/2508.14819

Synchronization driven acoustics: The nonlinear scattering of a self-oscillating meta-atom
In this study we demonstrate a self-oscillating acoustic meta-atom functioning as an amplifying transistor, where a steady external flow serves as a control signal to switch between reflective (off-state) and transmissive (on-state) regimes. In the on-state, an acoustic limit cycle synchronizes with incident sound waves. This process governs the energy transfer across the device, with a transmission bandwidth dictated by the synchronization region in parameter space (Arnold tongue). Our experim…

"Implementing Responsible AI: A Life-Cycle Reference Model Based on FATES Principles" https://doi.org/10.1142/S0219649225500789

Santa Cycle Rampage! December 6th, 2025 in Milwaukee and December 13th, 2025 in Madison.
"Santa Cycle Rampage is a fun way to raise critical funds that support youth and family based education and encouragement programs. These events provide critical financial support to our programs that help kids and families get riding safely and more often!"

charlie kirk assasination is the most sickening news cycle to me in a long time not for any of the reasons u might jump to (im numb to the fact trans people and privacy and free speech are kinda cooked in the us), but cuz i just cant work out what's real anymore. every step of the way ive been thrown off by the sheer amount of misinformation, and even worse needing others to point out that multiple images were ai. most nihilistic and empty its ever been

"#crypto leverage — whether through borrowing programs, margin trading, or perpetual futures — creates a cycle of risk that can rapidly snowball"
Again, of course. Leverage was one of the main drivers of the great crash of 1929. People then mortgaged their houses to buy stocks; now, to buy #Bitcoin

Anatomy of a crypto meltdown
October 2025 brought the most dramatic crypto flash crash of all time, but it was only a dress rehearsal for the systemic crisis the industry is building toward.

Characterizations of certain matroids by maximizing valuative invariants
Joseph E. Bonin
https://arxiv.org/abs/2507.14720 https://arx…

Characterizations of certain matroids by maximizing valuative invariants
Luis Ferroni and Alex Fink recently introduced a polytope of all unlabeled matroids of rank $r$ on $n$ elements, and they showed that the vertices of this polytope come from matroids that can be characterized by maximizing a sequence of valuative invariants. We prove that a number of the matroids that they conjectured to yield vertices indeed do (these include cycle matroids of complete graphs, projective geometries, and Dowling geometries), and we give additional examples (including truncation…

"Every stage of fossil fuel life cycle harms people & the environment: Report"
#FossilFuels #Climate #ClimateChange

Every stage of fossil fuel life cycle harms people & the environment: Report
A new report traces the life cycle of fossil fuels — from exploration and extraction to combustion and decommissioning — and found stark consequences at each stage for the health of people and the planet alike. “By examining fossil fuels’ health hazards across their entire life cycle, this report makes an important addition to our current understanding […]

You should read this and the comments too. https://social.chinwag.org/@mike/115227345504898198

Magnetic activity and differential rotation of HIP12653
Amina Boulkaboul, Lotfi Yelles Chaouche, Alessandro Carmelo Lanzafame, Yassine Damerdji
https://arxiv.org/abs/2509.14902 …

Magnetic activity and differential rotation of HIP12653
We present a spectroscopic and photometric study of HIP12653 to investigate its magnetic cycle and differential rotation. Using HARPS archival spectra matched with MARCS-AMBER theoretical templates, we derive the stellar parameters (Teff, logg, FeH, and vsini) of the target. The S-index, an activity indicator based on the emission of the CaII H&K lines, is fitted to determine the magnetic cycle and rotation periods. We refine the magnetic cycle period to 5799.20 \pm 0.88 d and suggest the exist…

🌍 Satellite data reveal African grasslands' carbon uptake rises with rainfall, unlike forests and savannas
https://phys.org/news/2025-07-satellite-reveal-african-grasslands-carbon.html

Satellite data reveal African grasslands' carbon uptake rises with rainfall, unlike forests and savannas
Africa is a source of uncertainty in carbon cycle calculations. By some estimates, the continent's landscapes emit 2.1 billion tons more carbon dioxide than they take up each year—about equal to 1.5 times the annual emissions from coal-fired power plants. But other estimates are almost the complete opposite, suggesting that the continent's copious plant matter takes up 2.0 billion more tons of carbon dioxide per year than it releases.

übers Radfahren, v.a. in den Niederlanden.
“Think of it this way: Car drivers behave like a bunch of geese. They have the same distance from each other and fly at the same speed, and move almost in military formation. Cyclists move like a swarm of sparrows. There are thousands of them moving in chaos, but there are no collisions. They turn a little bit; they change their speed. You must do the same.”

Can Each Side's Faith Break the Cycle of Mutually Assured Destruction for Israelis and Palestinians? (The UnPopulist)
https://www.theunpopulist.net/p/can-each-sides-faith-break-the-cycle
http://www.memeorandum.com/251007/p94#a251007p94

Fight smarter!
Break the cycle of stupidity: #resist

The Complexity of Color-constrained Paths in Semicomplete Multipartite Digraphs
Julian Brinkmann
https://arxiv.org/abs/2507.15667 https://

The Complexity of Color-constrained Paths in Semicomplete Multipartite Digraphs
Every semicomplete multipartite digraph contains a quasi-Hamiltonian path, but the problem of finding a quasi-Hamiltonian path with prescribed start and end vertex is NP-complete even when restricted to semicomplete multipartite digraphs with independence number exactly 3. Bang-Jensen, Wang and Yeo (arXiv 2024) showed that deciding the presence of a quasi-Hamiltonian cycle which does not contain at least one vertex from each color class is NP-complete. Similarly, deciding the presence of a quas…

Energy Bunching from Sub-Cycle Ionization Injection in Laser Wakefield Acceleration
A. Angella, E. L\"ofquist, C. Gustafsson, V. Poulain, F. D'Souza, C. Guo, A. Persson, P. Eng-Johnsson, C. -G. Wahlstr\"om, O. Lundh
https://arxiv.org/abs/2508.10829

Energy Bunching from Sub-Cycle Ionization Injection in Laser Wakefield Acceleration
We report the first experimental observation of carrier-envelope phase-driven energy bunching in laser wakefield acceleration. Using a few-cycle (~9 fs), multi-terawatt laser pulse and ionization injection in a helium-nitrogen gas mixture, we observe electron spectra composed of multiple quasi-monoenergetic peaks with regular narrow energy spacing. This comb structure arises from intermittent injection from successive half-cycles of the laser field, enabled by the evolving carrier-envelope phas…

werf is a #CNCF Sandbox CLI tool to implement full-cycle #CICD to #Kubernetes easily
https…

Average-power scalability of multi-cycle terahertz sources based on periodically poled lithium niobate stacks
Patrick J. Dalton, Robin L\"oscher, Tim Vogel, Robert B. Appleby, Graeme Burt, Steven P. Jamison, Morgan T. Hibberd, Darren M. Graham, Clara J. Saraceno
https://arxiv.org/abs/2509.13060

Average-power scalability of multi-cycle terahertz sources based on periodically poled lithium niobate stacks
We demonstrate that narrowband multi-cycle terahertz (MC-THz) sources based on periodically-poled lithium niobate (PPLN) wafer stacks can be driven by high repetition-rate, high energy femtosecond ytterbium-doped lasers. Operating at 10-kHz repetition rate with up to 104 W of pump power on a 10-wafer stack, we measure 26.4 mW of THz average power for a narrowband multi-cycle source. We identify and quantify strong lensing effects causing dramatic beam focusing in 47 wafer stacks which act as a …

Potential NFL coaching vacancies and top candidates, plus Tomlin's Flacco worries https://www.nytimes.com/athletic/6719955/2025/10/15/nfl-2026-head-coach-replacements-cycle-scoop-city/

SuryaBench: Benchmark Dataset for Advancing Machine Learning in Heliophysics and Space Weather Prediction
Sujit Roy, Dinesha V. Hegde, Johannes Schmude, Amy Lin, Vishal Gaur, Rohit Lal, Kshitiz Mandal, Talwinder Singh, Andr\'es Mu\~noz-Jaramillo, Kang Yang, Chetraj Pandey, Jinsu Hong, Berkay Aydin, Ryan McGranaghan, Spiridon Kasapis, Vishal Upendran, Shah Bahauddin, Daniel da Silva, Marcus Freitag, Iksha Gurung, Nikolai Pogorelov, Campbell Watson, Manil Maskey, Juan Bernabe-Moreno,…

SuryaBench: Benchmark Dataset for Advancing Machine Learning in Heliophysics and Space Weather Prediction
This paper introduces a high resolution, machine learning-ready heliophysics dataset derived from NASA's Solar Dynamics Observatory (SDO), specifically designed to advance machine learning (ML) applications in solar physics and space weather forecasting. The dataset includes processed imagery from the Atmospheric Imaging Assembly (AIA) and Helioseismic and Magnetic Imager (HMI), spanning a solar cycle from May 2010 to July 2024. To ensure suitability for ML tasks, the data has been preprocessed…

"OOP grew dramatically during the decade between 1985 and 95. The first OOPSLA Conf was held in '86, chaired by Daniel Ingalls of Smalltalk fame. Bjarne Stroustrup released the first versions of C . Brad Cox melted Smalltalk on top of C and created Objective-C. Bertrand Meyer released both Eiffel and his bestseller book. Borland added OOP support to Turbo Pascal 5.5. Famous groups like “The Three Amigos,” “The Gang of Four,” and the Agile movement coalesced around OOP."
…

The Hype Cycle Of OOP
Even though Marketing buzzwords might have an effect akin to Kryptonite against our readers, we're going to use the famous Gartner's Five-Step Hype Cycle to take a closer look at the practice of Object-Oriented Programming (OOP) and its various ups and downs in the past 50 years. Remembering that one of the core tenets of this magazine is to make the impossible dialogue possible, the framework provided by Gartner fits this task perfectly well.

Next year I need to align our family vacation with the late stage of the iOS beta cycle.

The cycle of life... ♻️

Computing Approximately Proportional Allocations of Indivisible Goods: Beyond Additive and Monotone Valuations
Martin Jupakkal Andersen, Ioannis Caragiannis, Anders Bo Ipsen, Alexander S{\o}ltoft
https://arxiv.org/abs/2508.12453

Computing Approximately Proportional Allocations of Indivisible Goods: Beyond Additive and Monotone Valuations
Although approximate notions of envy-freeness-such as envy-freeness up to one good (EF1)-have been extensively studied for indivisible goods, the seemingly simpler fairness concept of proportionality up to one good (PROP1) has received far less attention. For additive valuations, every EF1 allocation is PROP1, and well-known algorithms such as Round-Robin and Envy-Cycle Elimination compute such allocations in polynomial time. PROP1 is also compatible with Pareto efficiency, as maximum Nash welf…

Special Cycle on Shtukas and Categorical Trace
Zeyu Wang
https://arxiv.org/abs/2509.05526 https://arxiv.org/pdf/2509.05526…

Special Cycle on Shtukas and Categorical Trace
In this article, we relate the fake special cycle classes $z_{\mathbb{L}_σ,r}$ attached to a Hecke eigensheaf $\mathbb{L}_σ\in\mathrm{Shv}_{\mathrm{Nilp}}(\mathrm{Bun}_G)$ introduced in the author's previous work to the isotypic part of special cycles on Shtukas. As an application, we relate the self-intersection number of the isotypic part of special cycles arising from Rankin--Selberg period to higher derivatives of Rankin--Selberg $L$-functions.

On Modified Diagonal Cycles and the Beauville Decomposition of the Ceresa Cycle
Lucas Lagarde, Mohamed Moakher, Morena Porzio, James Rawson, Fernando Trejos Su\'arez
https://arxiv.org/abs/2510.07416

On Modified Diagonal Cycles and the Beauville Decomposition of the Ceresa Cycle
Let $C$ be a curve of genus $g \geq 2$, and let $J$ be its Jacobian. The choice of a degree 1 divisor $e$ on $C$ gives an embedding of $C$ into $J$; we denote by $[C]_{}^{e}\in \mathrm{CH}\left( J;\mathbb{Q} \right) $ the class in the Chow group of $J$ defined by the image of this embedding. It is known from the work of S.-W. Zhang that the vanishing of the Ceresa cycle $\mathrm{Cer}(C,e):=[C]^{e} - [-1]_* [C]^e$ is equivalent to both the vanishing of the 1st Beauville component $[C]_{(1)}^e$ a…

A Cycle Walk for Sampling Measures on Spanning Forests for Redistricting
Daryl R. DeFord, Gregory Herschlag, Jonathan C. Mattingly
https://arxiv.org/abs/2509.08629 https://

A Cycle Walk for Sampling Measures on Spanning Forests for Redistricting
We introduce a new Markov Chain called the Cycle Walk for sampling measures of graph partitions where the partition elements have roughly equal size. Such Markov Chains are of current interest in the generation and evaluation of political districts. We present numerical evidence that this chain can efficiently sample target distributions that have been difficult for existing sampling Markov chains.

CYCLE-INSTRUCT: Fully Seed-Free Instruction Tuning via Dual Self-Training and Cycle Consistency
Zhanming Shen, Hao Chen, Yulei Tang, Shaolin Zhu, Wentao Ye, Xiaomeng Hu, Haobo Wang, Gang Chen, Junbo Zhao
https://arxiv.org/abs/2508.16100

CYCLE-INSTRUCT: Fully Seed-Free Instruction Tuning via Dual Self-Training and Cycle Consistency
Instruction tuning is vital for aligning large language models (LLMs) with human intent, but current methods typically rely on costly human-annotated seed data or powerful external teacher models. While instruction back-translation techniques reduce this dependency, they remain fundamentally tethered to an initial seed set, which limits full automation, introduces biases, and can lead to inefficient use of unlabeled corpora. In this paper, we propose Cycle-Instruct, a novel framework that achie…

re the The fuckity-fuck cycle -
Reminds me of the" 1950s in the United States are often characterized by a strong emphasis on conformity, particularly within the white, middle-class society. This era saw the rise of the suburbs, with mass-produced homes and consumer goods, reinforcing a sense of sameness."
via @…

An inverse problem on a metric graph with cycle
Sergei Avdonin, Julian Edward
https://arxiv.org/abs/2508.10121 https://arxiv.org/pdf/2508.10121

An inverse problem on a metric graph with cycle
Consider a quantum graph consisting of a ring with two attached edges, and assume Kirchhoff-Neumann conditions hold at the internal vertices. Associated to this graph is a Schrödinger type operator $L=-Δ+q(x)$ with Dirichlet boundary conditions at the two boundary nodes. Let $\{ ω_n^2, \ φ_n(x)\}$ be the eigenvalues and associated normalized eigenfunctions. Let $v_1$ be a boundary vertex, and $v_2$ the adjacent internal vertex. Assume we know the following data: $\{ ω_n^2,\partial_x φ_n(v…

ReVISit 2: A Full Experiment Life Cycle User Study Framework
Zach Cutler, Jack Wilburn, Hilson Shrestha, Yiren Ding, Brian Bollen, Khandaker Abrar Nadib, Tingying He, Andrew McNutt, Lane Harrison, Alexander Lex
https://arxiv.org/abs/2508.03876

ReVISit 2: A Full Experiment Life Cycle User Study Framework
Online user studies of visualizations, visual encodings, and interaction techniques are ubiquitous in visualization research. Yet, designing, conducting, and analyzing studies effectively is still a major burden. Although various packages support such user studies, most solutions address only facets of the experiment life cycle, make reproducibility difficult, or do not cater to nuanced study designs or interactions. We introduce reVISit 2, a software framework that supports visualization resea…

"Every stage of fossil fuel life cycle harms people & the environment: Report"
#FossilFuels #Climate #ClimateChange

Every stage of fossil fuel life cycle harms people & the environment: Report
A new report traces the life cycle of fossil fuels — from exploration and extraction to combustion and decommissioning — and found stark consequences at each stage for the health of people and the planet alike. “By examining fossil fuels’ health hazards across their entire life cycle, this report makes an important addition to our current understanding […]

Cycle of Creativity - Inspire, Create, Rest, Repeat
#creativity #CreativeLife
https://muz4…

Cycle of Creativity - Inspire, Create, Rest, Repeat
Stan Stewart - @muz4now

Cyclic Variational Quantum Eigensolver: Escaping Barren Plateaus through Staircase Descent
Hao Zhang, Ayush Asthana
https://arxiv.org/abs/2509.13096 https://

Cyclic Variational Quantum Eigensolver: Escaping Barren Plateaus through Staircase Descent
We introduce the Cyclic Variational Quantum Eigensolver (CVQE), a hardware-efficient framework for accurate ground-state quantum simulation on noisy intermediate-scale quantum (NISQ) devices. CVQE departs from conventional VQE by incorporating a measurement-driven feedback cycle: Slater determinants with significant sampling probability are iteratively added to the reference superposition, while a fixed entangler (e.g., single-layer UCCSD) is reused throughout. This adaptive reference growth sy…

Characterizing planetary systems with SPIRou: questions about the magnetic cycle of 55 Cnc A and two new planets around B
C. Moutou, P. Petit, P. Charpentier, P. Cristofari, C. Baruteau, P. Th\'ebault, L. Arnold, E. Artigau, A. Carmona, N. J. Cook, F. Debras, X. Delfosse, J. -F. Donati, L. Malo, M. Ould-Elhkim
https://arxiv.org/abs/251…

Characterizing planetary systems with SPIRou: questions about the magnetic cycle of 55 Cnc A and two new planets around B
One of the first exoplanet hosts discovered thirty years ago, the star 55 Cnc has been constantly observed ever since. It is now known to host at least five planets with orbital periods ranging from 17 hours to 15 years. It is also one of the most extreme metal rich stars in the neighbourhood and it has a low-mass secondary star. In this article, we present data obtained at the Canada-France-Hawai'i Telescope with the SPIRou spectropolarimeter on both components of the 55 Cnc stellar system. We…

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Plotted my MacBook Pro's battery usage history based on almost 4 years of coconutBattery data for shits and giggles

It’s Getting Easier.
As some might know, I’m a big fan of riding a bike. It’s in my blood. Born and raised in Belgium where cycling is the national sport—well, maybe after football, which isn’t a sport, it’s a mafia cover-up. My uncle and grandfather are both fanatic cyclists, and with our Italian roots, the circle is complete.
But since I live in Central Europe, where the roads never recovered from communism and have more holes than a Dutch cheese factory, I find it hard to cycle …

Impacts of the duration and intensity of grazing cycle on vegetation population dynamics in semi-arid ecosystems with seasonal succession
Junhong Gan, Xiaoli Wang, Guohong Zhang
https://arxiv.org/abs/2508.09760

Impacts of the duration and intensity of grazing cycle on vegetation population dynamics in semi-arid ecosystems with seasonal succession
A novel vegetation model involving seasonal succession to distinguish the dryperiod, growth period and grazing period is proposed. The main aim is to explore the effects of duration and intensity of grazing season on the dynamic behaviors of a single vegetation population and the competitive outcomes between two competing vegetation species. The critical duration of drought period and grazing period that enable the persistence of a single vegetation population is obtained. Further, we found tha…

SLENet: A Novel Multiscale CNN-Based Network for Detecting the Rats Estrous Cycle
Qinyang Wang, Hoileong Lee, Xiaodi Pu, Yuanming Lai, Yiming Ma
https://arxiv.org/abs/2507.19566

SLENet: A Novel Multiscale CNN-Based Network for Detecting the Rats Estrous Cycle
In clinical medicine, rats are commonly used as experimental subjects. However, their estrous cycle significantly impacts their biological responses, leading to differences in experimental results. Therefore, accurately determining the estrous cycle is crucial for minimizing interference. Manually identifying the estrous cycle in rats presents several challenges, including high costs, long training periods, and subjectivity. To address these issues, this paper proposes a classification network-…

p-multigrid method for the discontinuous Galerkin discretization of elliptic problems
Nuo Lei, Donghang Zhang, Weiying Zheng
https://arxiv.org/abs/2509.13669 https://

p-multigrid method for the discontinuous Galerkin discretization of elliptic problems
In this paper, we propose a $W$-cycle $p$-multigrid method for solving the $p$-version symmetric interior penalty discontinuous Galerkin (SIPDG) discretization of elliptic problems. This SIPDG discretization employs hierarchical Legendre polynomial basis functions. Inspired by the uniform convergence theory of the $W$-cycle $hp$-multigrid method in [P. F. Antonietti, et al., SIAM J. Numer. Anal., 53 (2015)], we provide a rigorous convergence analysis for the proposed $p$-multigrid method, consi…

Far beyond the Sun - the magnetic cycle of iota Horologii: #star: https://www.aip.de/en/news/heartbeat-of-a-star/

🐐 Bundled climate solutions for better production: Scientists listen to West African farmers
https://phys.org/news/2025-09-bundled-climate-solutions-production-scientists.html

Bundled climate solutions for better production: Scientists listen to West African farmers
The rain delays, sorghum withers; when a storm finally breaks, complaints rise again. To break this cycle of uncertainty, scientists from the Alliance of Bioversity International and CIAT, INERA, and the University of Ghana conducted the first large-scale survey on agricultural climate services in Burkina Faso, Ghana, Mali, and Senegal.

High-Resolution Simulations of the Interaction Between the Nova/Supernova Ejecta and the Accretion Disk
Axel S. Lechuga, Domingo Garc\'ia-Senz, Jordi Jos\'e
https://arxiv.org/abs/2508.11352

High-Resolution Simulations of the Interaction Between the Nova/Supernova Ejecta and the Accretion Disk
Many nova and type Ia supernova explosion scenarios involve accretion disks. However, direct numerical simulations of these explosive phenomena have barely addressed the question of the impact of ejecta-disk collision on the midterm evolution of such explosions. This is particularly critical for a better understanding of classical and recurrent novae, where each nova cycle depends on the imprint left by the precedent explosion. In this work, we describe and analyze a set of high-resolution simu…

Transforming Noise Distributions with Histogram Matching: Towards a Single Denoiser for All
Sheng Fu, Junchao Zhang, Kailun Yang
https://arxiv.org/abs/2510.06757 https://…

Transforming Noise Distributions with Histogram Matching: Towards a Single Denoiser for All
Supervised Gaussian denoisers exhibit limited generalization when confronted with out-of-distribution noise, due to the diverse distributional characteristics of different noise types. To bridge this gap, we propose a histogram matching approach that transforms arbitrary noise towards a target Gaussian distribution with known intensity. Moreover, a mutually reinforcing cycle is established between noise transformation and subsequent denoising. This cycle progressively refines the noise to be co…

Monthly mean carbon dioxide as measured at Mauna Loa Observatory, Hawaii.
July 2025:    
427.87. ppm
July 2024:    
425.55 ppm
The carbon dioxide data on Mauna Loa constitute the longest record of direct measurements of CO2 in the atmosphere.
https://gml.noaa.gov/ccgg/trends/

Trends in CO2 - NOAA Global Monitoring Laboratory
GML conducts research on greenhouse gas and carbon cycle feedbacks, changes in aerosols, and surface radiation, and recovery of stratospheric ozone.

Controlling complex rhythms: A hierarchical approach to limit cycle switching
Sandip Saha, Suvam Pal, Dibakar Ghosh
https://arxiv.org/abs/2508.10818 https://

Controlling complex rhythms: A hierarchical approach to limit cycle switching
Limit cycles are self-sustained, closed trajectories in phase space representing (un)-stable, periodic behavior in nonlinear dynamical systems. They underpin diverse natural phenomena, from neuronal firing patterns to engineering oscillations. The presence of multiple concentric limit cycles reflects distinct behavioral symmetries within a system. In this work, we investigate the hierarchical dynamical transitions from one limit cycle to another, driven by oscillatory excitation while preservin…

Activity-Cycle Variations of Convection Scales in Subsurface Layers of the Sun
Alexander V. Getling, Alexander G. Kosovichev
https://arxiv.org/abs/2508.12465 https://

Activity-Cycle Variations of Convection Scales in Subsurface Layers of the Sun
We use subsurface-flow velocity maps inferred by time--distance helioseismology from Doppler measurements with the Helioseismic and Magnetic Imager (HMI) of the Solar Dynamics Observatory (SDO) to investigate variations of large-scale convection during Solar Cycles 24 and 25 in the 19-Mm-deep layer. The spatial power spectra of the horizontal-flow divergence reveal well-defined characteristic scales of solar supergranulation in the upper 4 Mm layer, while the giant-cell scale is prominent below…

From Agentification to Self-Evolving Agentic AI for Wireless Networks: Concepts, Approaches, and Future Research Directions
Changyuan Zhao, Ruichen Zhang, Jiacheng Wang, Dusit Niyato, Geng Sun, Xianbin Wang, Shiwen Mao, Abbas Jamalipour
https://arxiv.org/abs/2510.05596

From Agentification to Self-Evolving Agentic AI for Wireless Networks: Concepts, Approaches, and Future Research Directions
Self-evolving agentic artificial intelligence (AI) offers a new paradigm for future wireless systems by enabling autonomous agents to continually adapt and improve without human intervention. Unlike static AI models, self-evolving agents embed an autonomous evolution cycle that updates models, tools, and workflows in response to environmental dynamics. This paper presents a comprehensive overview of self-evolving agentic AI, highlighting its layered architecture, life cycle, and key techniques,…

Ultrafast optically induced tunneling in narrow metallic gaps from the time dependent density functional perspective
Boyang Ma, Antton Babaze, Michael Kr\"uger, Javier Aizpurua, Andrei G. Borisov
https://arxiv.org/abs/2509.14802

Ultrafast optically induced tunneling in narrow metallic gaps from the time dependent density functional perspective
In this work, using the time-dependent density functional theory, we address the electron tunneling triggered by short (single-cycle and several-cycle) optical pulses in narrow metallic gaps under conditions relevant for actual experiments. We identify photon-assisted tunneling with one-photon, two-photon, and higher-order photon absorption, and we discuss the effect of the tunneling barrier, applied bias, and strength of the optical field on transition from photon-assisted tunneling (weak opti…

Spanning path-cycle systems with given end-vertices in regular graphs (full version)
Yoshimi Egawa, Mikio Kano, Kenta Ozeki
https://arxiv.org/abs/2508.11302 https://

Spanning path-cycle systems with given end-vertices in regular graphs (full version)
We prove the following theorem. Let $r\ge 4$ be an integer, and $G$ be a $K_{1,r}$-free $r$-edge-connected $r$-regular graph. Then, for every set $W$ of even number of vertices of $G$ such that the distance between any two vertices of $W$ in $G$ is at least 3, $G$ has vertex-disjoint paths and cycles $P_1, \ldots, P_m, C_1, \ldots, C_n$ such that (i) $V(G)=V(P_1) \cup \cdots \cup V(P_m) \cup V(C_1) \cup \cdots \cup V(C_n)$, (ii) each path $P_i$ connects two vertices of $W$, and (iii) the set of…

"Only a third of world’s river basins experienced normal conditions in 2024"
#Rivers #Water #Climate #ClimateChange

A New Cycle of Texas Gerrymandering: Your Questions Answered (Share/Bolts)
https://boltsmag.org/a-new-cycle-of-texas-gerrymandering-your-questions-answered/
http://www.memeorandum.com/250731/p65#a250731p65

Universal codimension two cycle on a very general cubic threefold
Kalyan Banerjee
https://arxiv.org/abs/2509.06013 https://arxiv.org/pdf/2509.06013

Universal codimension two cycle on a very general cubic threefold
In this paper, we prove that a very general cubic threefold does not admit a universal codimension-two cycle and hence is stably irrational.

Cycle of Creativity – Inspire, Create, Rest, Repeat #creativity #inspiration https://muz4now.com/2023/cy…

Cycle of Creativity - Inspire, Create, Rest, Repeat
Stan Stewart - @muz4now

Toward Quantum Enabled Solutions for Real-Time Currency Arbitrage in Financial Markets
Suman Kumar Roy, Rahul Rana, M Girish Chandra, Nishant Kumar, Manoj Nambiar
https://arxiv.org/abs/2509.09289

Toward Quantum Enabled Solutions for Real-Time Currency Arbitrage in Financial Markets
Currency arbitrage leverages price discrepancies in currency exchange rates across different currency pairs to gain risk-free profits. It involves multiple trading, where short-lived price discrepancies require real-time, high-speed processing of vast solution space, posing challenges for classical computing. In this work, we formulate an enhanced mathematical model for the currency arbitrage problem by adding simple cycle preservation constraints, which guarantee trading cycle validity and eli…

Polar Filaments Capture High Latitude Solar Poloidal Field Interactions and can Foretell the Future Sunspot Cycle Amplitude before Polar Field Precursors
Srinjana Routh, Shaonwita Pal, Dibyendu Nandy, Subhamoy Chatterjee, Dipankar Banerjee, Mohd. Saleem Khan
https://arxiv.org/abs/2510.12142

Polar Filaments Capture High Latitude Solar Poloidal Field Interactions and can Foretell the Future Sunspot Cycle Amplitude before Polar Field Precursors
Polar fields at the minimum of a sunspot cycle -- which are a manifestation of the radial component of the Sun's poloidal field -- are deemed to be the best indicator of the strength of the toroidal component, and hence the amplitude of the future sunspot cycle. However, the Sun's polar magnetic fields are difficult to constrain with ground-based or space-based observations from near the plane-of-ecliptic. In this context, polar filaments -- dark, elongated structures that overlie polarity inve…

A characterization of locally ordered ternary relations in terms of digraphs
Guillermo Gamboa Quintero, Mart\'in Matamala, Juan Pablo Pe\~na
https://arxiv.org/abs/2509.11956

A characterization of locally ordered ternary relations in terms of digraphs
In 1917, Huntington and Kline, followed by Huntington in 1924, studied systems of axioms for ternary relations aiming to capture the concepts of linear order (called betwenness) and cycle order, respectively. Among many other properties, they proved there are several independent set of axioms defining either linear order or cycle order. In this work, we consider systems arising from the four common axioms of linear order and cycle order, together with a new axiom F, stating that if a tuple abc …

An opportunity to improve Data Center Efficiency: Optimizing the Server's Upgrade Cycle
Panagiota Nikolaou, Freddy Gabbay, Jawad Haj-Yahya, Yiannakis Sazeides
https://arxiv.org/abs/2510.05787

An opportunity to improve Data Center Efficiency: Optimizing the Server's Upgrade Cycle
This work aims to improve a data center's efficiency by optimizing the server upgrade plan: determine the optimal timing for replacing old servers with new ones. The opportunity presented by this approach is demonstrated through a study based on historical server data. The study establishes a significant opportunity to increase the QPS/(TCOxCO2) metric by formulating a global upgrade plan at the data center's design time covering its entire life cycle. This plan leverages information, such as s…

📉 Either too little or too much: Report finds world's water cycles are getting more erratic
#climate

Either too little or too much: Report finds world's water cycles are getting more erratic
The water cycle has become increasingly erratic and extreme, swinging between deluge and drought, according to a new report from the World Meteorological Organization (WMO). It highlights the cascading impacts of too much or too little water on economies and society.

Bengals rebound, CeeDee Lamb's return and fantasy football strategy for first-half heroes https://www.nytimes.com/athletic/6726050/2025/10/17/fantasy-football-news-week-7-bengals-flacco-ceedee-lamb/

"By 2051, emissions from coal mining on federal lands could drop by 86%"
#US #USA #America #Emissions

By 2051, emissions from coal mining on federal lands could drop by 86%
Federal lands—which make up about 640 million acres, or 28%, of U.S. soil—are used for many purposes, including conservation, recreation, and extraction of resources such as coal. Greenhouse gas emissions are released throughout the life cycle of coal use, including during its mining, transport, and combustion.

Limit cycles of piecewise smooth vector fields on torus with non-regular switching manifold
Thaylon Souza de Oliveira, Ricardo Miranda Martins
https://arxiv.org/abs/2508.09306 h…

Limit cycles of piecewise smooth vector fields on torus with non-regular switching manifold
We study the maximum number of crossing limit cycles in piecewise-smooth vector fields on the two-dimensional torus, where the discontinuity set is the boundary of the fundamental square. Under the assumption of a polynomial first integral of degree n, we apply algebraic curve-intersection methods to obtain sharp upper bounds on cycle counts. In the quadratic case (n=2), we prove at most one cycle of type aa or bb and at most two of type aba or bab, and we give explicit parameter criteria for t…

A note on the number of non-cycle components in a pseudo 2-factor of graphs
Masaki Kashima
https://arxiv.org/abs/2510.12155 https://arxiv.org/pdf/2510.1215…

A note on the number of non-cycle components in a pseudo 2-factor of graphs
A pseudo 2-factor of a graph is a spanning subgraph such that each component is $K_1$, $K_2$, or a cycle. This notion was introduced by Bekkai and Kouider in 2009, where they showed that every graph $G$ has a pseudo 2-factor with at most $α(G)-δ(G)+1$ components that are not cycles. For a graph $G$ and a set of vertices $S$, let $δ_G(S)$ denote the minimum degree of vertices in $S$. In this note, we show that every graph $G$ has a pseudo 2-factor with at most $f(G)$ components that are not c…

EUV Late Phase Flares as Observed by EVE and AIA Onboard the Solar Dynamics Observatory
Sascha Ornig, Astrid M. Veronig, Karin Dissauer
https://arxiv.org/abs/2508.13996 https://…

EUV Late Phase Flares as Observed by EVE and AIA Onboard the Solar Dynamics Observatory
Context. EUV late phase (ELP) flares exhibit a second peak in warm coronal emissions minutes to hours after the main peak of the flare. This phase is all but negligible, yet it is still poorly understood what role it plays across the solar cycle and what governs it. Aims. We present a statistical analysis of ELP flares over four years between May 2010 and May 2014 based on properties like eruptivity, magnetic configuration, and late-phase duration, delay and strength in order to understand wh…

Correlated double ramification cycle formula
Thomas Blomme, Francesca Carocci
https://arxiv.org/abs/2509.24721 https://arxiv.org/pdf/2509.24721

Correlated double ramification cycle formula
We prove a refinement of Pixton's formula for the double ramification cycle with target variety which takes into account the correlator of a rubber map previously introduced by the authors. To do so, we need to: reinterpret the correlator in terms of (logarithmic) roots of the trivial line bundle; refine the natural stratification of the boundary of moduli of maps to keep track of how torsion line bundles on the target variety pull-back. We apply the refined DR cycle formula to compute 0-correl…

Cycle systems, coparking functions, and h-vectors of matroids
Scott Corry, Anton Dochtermann, Sol\'is McClain, David Perkinson, Lixing Yi
https://arxiv.org/abs/2509.11460 ht…

Cycle systems, coparking functions, and h-vectors of matroids
The h-vector of a matroid M is an important invariant related to the independence complex of M and can also be recovered from an evaluation of its Tutte polynomial. A well-known conjecture of Stanley posits that the h-vector of a matroid is a pure O-sequence, meaning that it can be obtained by counting faces of a pure multicomplex. Merino has established Stanley's conjecture for the case of cographic matroids via chip-firing on graphs and the concept of a G-parking function. Inspired by these c…

🪭 Research Progress on CO2 Transcritical Cycle Technology for Building Heating and Cooling Applications
#energy

The poset of maximal tubings of the cycle graph is a lattice
Ben Adenbaum, Emily Barnard, Max Hlavacek, Bryson Kagy, Nathan R. T. Lesnevich, George D. Nasr, Katie Waddle
https://arxiv.org/abs/2510.09429

The poset of maximal tubings of the cycle graph is a lattice
The poset of maximal tubings of a graph generalizes several well-known and remarkable partial orders. Notable examples include the weak Bruhat order and the Tamari lattice, posets of maximal tubings for the complete graph and the path graph, respectively. It is an open problem to characterize graphs for which the poset of maximal tubings is a lattice. In this paper, we prove that the poset of maximal tubings for the cycle graph is a lattice, and moreover that it is semidistributive and congruen…

Which Solar Latitude Follows the Sunspot Cycle Exactly?
K P Raju
https://arxiv.org/abs/2509.09974 https://arxiv.org/pdf/2509.09974

Which Solar Latitude Follows the Sunspot Cycle Exactly?
The large-scale convection in the Sun known as supergranulation is manifested as a network structure on the solar surface. The network cells have an average lifetime of 24 hr, a size of about 30 Mm, and a lane width of about 6 Mm. We have obtained the lane widths and intensities at different latitudes from the Ca {\sc ii} K spectroheliograms from the 100 yr Kodaikanal archival data. We have then calculated the cross correlation function of lane widths and intensities with sunspot number at ever…

Two Proofs of the Hamiltonian Cycle Identity
Hamilton Sawczuk, Edinah Gnang
https://arxiv.org/abs/2510.02473 https://arxiv.org/pdf/2510.02473

Two Proofs of the Hamiltonian Cycle Identity
The Hamiltonian cycle polynomial can be evaluated to count the number of Hamiltonian cycles in a graph. It can also be viewed as a list of all spanning cycles of length $n$. We adopt the latter perspective and present a pair of original proofs for the Hamiltonian cycle identity which relates the Hamiltonian cycle polynomial to the important determinant and permanent polynomials. The first proof is a more accessible combinatorial argument. The second proof relies on viewing polynomials as both l…

Role of sunspot latitude versus tilt in determining the polar field and amplitude of the next cycle: Cause of the weak Solar Cycle 20
Bidisha Dey, Anu Sreedevi, Bidya Binay Karak
https://arxiv.org/abs/2509.17146

Role of sunspot latitude versus tilt in determining the polar field and amplitude of the next cycle: Cause of the weak Solar Cycle 20
One prominent feature of solar cycle is its irregular variation in its cycle strength, making it challenging to predict the amplitude of the next cycle. Studies show that fluctuations and nonlinearity in generating poloidal field throughout the decay and dispersal of tilted sunspots produce variation in the solar cycle. The flux, latitudinal position, and tilt angle of sunspots are the primary parameters that determine the polar field and, thus, the next solar cycle strength. By analysing the o…

On the Tur\'{a}n number of odd-ballooning of $3$-chromatic graphs
Longfei Fang, Xueyi Huang, Huiqiu Lin, Jinlong Shu
https://arxiv.org/abs/2508.12826 https://

On the Turán number of odd-ballooning of $3$-chromatic graphs
Given a graph $F$, the Turán number ${\rm ex}(n,F)$ is the maximum number of edges in any $n$-vertex $F$-free graph. The odd-ballooning of $F$, denoted by $F^{o}$, is a graph obtained by replacing each edge of $F$ with an odd cycle, where all new vertices of the odd cycles are distinct. The Turán number of the odd-ballooning of $F$ has been established for several important cases. For a star, it was determined by Erdős, Füredi, Gould, and Gunderson (1995), Hou, Qiu, and Liu (2018), and Yuan…

Replaced article(s) found for math.CO. https://arxiv.org/list/math.CO/new
[1/2]:
- The Orbital Chromatic Polynomial of a Cycle
Klaus Dohmen, Mandy Lange-Geisler

Injection of magnetic helicity in solar cycle 24 and early phase of cycle 25
H. Q. Zhang, S. B. Yang, K. M. Kuzanyan, Axel Brandenburg, H. Q. Xu, D. D. Sokoloff
https://arxiv.org/abs/2507.19122

Injection of magnetic helicity in solar cycle 24 and early phase of cycle 25
The injection of magnetic helicity into the heliosphere during solar cycle 24 and the early phase of cycle 25 has been calculated based on the analysis of a series of synoptic magnetic charts. During the cycle, the injected magnetic helicity is found to be mainly contributed by the magnetic field in active regions. According to Hale's law, the polarities of active regions statistically reverse between solar cycles 24 and 25. We suggest that the dominant source of injected magnetic helicity like…

Far beyond the Sun: III. The magnetic cycle of $\boldsymbol\iota$ Horologii
Juli\'an D. Alvarado-G\'omez (Leibniz Institute for Astrophysics Potsdam, Germany), Gaitee A. J. Hussain (European Space Agency, The Netherlands), Eliana M. Amazo-G\'omez (Leibniz Institute for Astrophysics Potsdam, Germany), Yu Xu (Leibniz Institute for Astrophysics Potsdam, Germany, Peking University, China), Katja Poppenh\"ager (Leibniz Institute for Astrophysics Potsdam, Germany, Potsdam Un…

Far beyond the Sun: III. The magnetic cycle of $\boldsymbolι$ Horologii
We present a comprehensive investigation of the magnetic cycle of the young, active solar analogue $ι$ Horologii ($ι$ Hor) based on intensive spectropolarimetric monitoring using HARPSpol. Over a nearly three-year campaign, the technique of Zeeman-Doppler Imaging (ZDI) was used to reconstruct 18 maps of the large-scale surface magnetic field of the star. These maps trace the evolution of the magnetic field morphology over approximately 139 stellar rotations. Our analysis uncovers pronounced t…

An analysis of the solar differential rotation in solar cycle No. 19 (1954-1964) determined using Kanzelhoehe sunspot group positions
Ivana Poljancic Beljan, Luka Sibenik, Tomislav Jurkic, Klaudija Loncaric, Rajka Jurdana-Sepic, Damir Hrzina, Werner Poetzi, Roman Brajsa, Astrid M. Veronig, Arnold Hanslmeier
https://arxiv.org/abs/2510.03002…

An analysis of the solar differential rotation in solar cycle No. 19 (1954-1964) determined using Kanzelhoehe sunspot group positions
We study solar differential rotation (DR) for solar cycle No. 19 (1954-1964) by tracing sunspot groups on the sunspot drawings of Kanzelhoehe Observatory for Solar and Environmental Research (KSO). Our aim is to extend previous DR analysis from the KSO data (1964-2016) to the years prior to 1964 to create a catalog of sunspot group positions and DR parameters from KSO sunspot drawings and white light images. Synodic angular rotation velocities were first determined using the daily shift (DS) an…