Tootfinder

Extreme mass-ratio inspiral within an ultralight scalar cloud I. Scalar radiation
Dongjun Li, Colin Weller, Patrick Bourg, Michael LaHaye, Nicol\'as Yunes, Huan Yang
https://arxiv.org/abs/2507.02045

Extreme mass-ratio inspiral within an ultralight scalar cloud I. Scalar radiation
In this work, we study the dynamics of an extreme mass-ratio inspiral (EMRI) embedded within a scalar cloud populated around the massive black hole. This cloud may be generated through the black hole superradiant process if the wavelength of the scalar particle is comparable to the size of the massive black hole. The EMRI motion perturbs the cloud, producing scalar radiation towards infinity and into the black hole horizon. In addition, the backreaction of the scalar radiation onto the orbit mo…

The Relationship Between Eddington Ratio and Column Density in U/LIRG AGN
Jaya Nagarajan-Swenson, George C. Privon, Aaron S. Evans, Loreto Barcos-Mu\~noz, Claudio Ricci, Anne M. Medling, Vivian U, Alejandro Saravia, Kara N. Green, Makoto Johnstone, Gabriela A. Meza
https://arxiv.org/abs/2506.02124

The Relationship Between Eddington Ratio and Column Density in U/LIRG AGN
The local X-ray AGN population appears to follow a growth cycle regulated by the AGN's own radiation, marked by changes in their obscuration and Eddington ratio during accretion events. Because AGN in infrared-selected galaxies are more likely to be Compton-thick and have evidence for over-massive black holes, we explore whether infrared-selected AGN follow the radiation-regulated AGN growth scheme. We calculate the Eddington ratios of nine U/LIRG AGN with dynamical BH mass measurements, findin…

Alkali phenoxides in comets
M. Fulle, P. Molaro, A. Rotundi, L. Tonietti, A. Aletti, L. Buzzi, P. Valisa
https://arxiv.org/abs/2506.02343 https://

Alkali phenoxides in comets
Potassium was first detected in spectra of the sungrazer comet Ikeya-Seki at the heliocentric distance rh = 0.15 au and, 48 years later, in comets PanSTARRS and ISON at rh = 0.46 au. The alkali tail photoionization model provides a Na/K ratio close to the solar value. No lithium was detected in any comet: the lower limit of the Na/Li ratio was almost one order of magnitude greater than the solar ratio. Here we searched for the emissions of the alkali NaI, KI, and LiI in Comets C/2020 F3 and C/2…

Parametric Coincidence in the Baryon to Dark Matter Ratio from Affleck-Dine Baryogenesis and UV Freeze-in Dark Matter
Jae Hyeok Chang, Chang Sub Shin, James Unwin
https://arxiv.org/abs/2506.03269

Parametric Coincidence in the Baryon to Dark Matter Ratio from Affleck-Dine Baryogenesis and UV Freeze-in Dark Matter
We highlight that the observed concurrence between the baryon and dark matter relic densities can be explained via a parametric coincidence between two distinct production mechanisms: Affleck-Dine baryogenesis and dark matter UV freeze-in. In the Affleck-Dine mechanism, the baryon asymmetry is naturally proportional to the inflationary reheating temperature $T_{\rm rh}$, which also plays a critical role in setting the relic abundance of UV freeze-in dark matter. Since Affleck-Dine baryogenesis …

Improved Risk Ratio Approximation by Complementary Log-Log Models: A Comparison with Logistic Models
Yuji Tsubota, Kenji Beppu
https://arxiv.org/abs/2506.00889

Improved Risk Ratio Approximation by Complementary Log-Log Models: A Comparison with Logistic Models
Odds ratios obtained from logistic models fail to approximate risk ratios with common outcomes, leading to potential misinterpretations about exposure effects by practitioners. This article investigates the complementary log-log models as a practical alternative to produce risk ratio approximation. We demonstrate that the corresponding effect measure of complementary log-log models, called the complementary log ratio in this article, consistently provides a closer approximation to risk ratios t…

This https://arxiv.org/abs/2410.01494 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Equilibrium of Charges and Differential Equations Solved by Polynomials II
We continue study of equilibrium of two species of 2d coulomb charges (or point vortices in 2d ideal fluid) started in (Igor Loutsenko, J. Phys. A: Math. Gen. 37, 1309, 2004). Although for two species of vortices with circulation ratio -1 the relationship between the equilibria and the factorization/Darboux transformation of the Schrodinger operator was established a long ago, the question about similar relationship for the ratio -2 remained unanswered. Here we present the answer: One has to co…

🌳 InventWood is about to mass produce wood that’s stronger than steel
https://techcrunch.com/2025/05/12/inventwood-is-about-to-mass-produce-wood-thats-stronger-than-steel/

Exclusive: InventWood is about to mass-produce wood that’s stronger than steel | TechCrunch
The material has 50% more tensile strength than steel with a strength-to-weight ratio that’s ten-times better.

Programmable wrinkling for functionally-graded auxetic circular membranes
Sairam Pamulaparthi Venkata, Valentina Balbi, Michel Destradea, Dino Accoto, Giuseppe Zurlo
https://arxiv.org/abs/2506.04148

Programmable wrinkling for functionally-graded auxetic circular membranes
Materials with negative Poisson's ratio, also known as auxetic materials, display exotic properties such as expansion in all directions under uni-axial tension. For their unique properties, these materials find a broad range of applications in robotic, structural, aerospace, and biomedical engineering. In this work we study the wrinkling behavior of thin and soft auxetic membranes, subjected to edge tractions. We show that spatial inhomogeneities of the Young modulus and of the Poisson ratio …

Global Energy Minimization for Simplex Mesh Optimization: A Radius Ratio Approach to Sliver Elimination
Dong Wang, Chunyu Chen, Huayi Wei
https://arxiv.org/abs/2507.01762

Global Energy Minimization for Simplex Mesh Optimization: A Radius Ratio Approach to Sliver Elimination
The quality of simplex mesh is crucial for the stability and accuracy of numerical simulations in finite element analysis and computational geometry. However, the presence of sliver elements in 3D simplex mesh can severely impact the results. This paper presents a novel method based on a radius ratio energy function to optimize the quality of simplex mesh elements. This method can effectively eliminate sliver elements, thereby enhancing mesh quality.The gradient of the proposed energy function …

This https://arxiv.org/abs/2406.12966 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Origin of the hidden energy scale and the $f$-ratio in geometrically frustrated magnets
Sufficiently clean geometrically frustrated (GF) magnets are the largest class of candidate materials that may host quantum spin liquids (QSLs). Some of them have been shown to exhibit spin-glass freezing, potentially precluding QSLs, at the "hidden energy scale", which is significantly lower than the microscopic energy scale of spin interactions. Here, we investigate the origin of the hidden energy scale and its relationship to the $f$-ratio, the figure of merit for the degree of frustration i…

Bayesian frequency estimation at the fundamental quantum limit
James W. Gardner, Tuvia Gefen, Ethan Payne, Su Direkci, Sander M. Vermeulen, Simon A. Haine, Joseph J. Hope, Lee McCuller, Yanbei Chen
https://arxiv.org/abs/2507.02811

Bayesian frequency estimation at the fundamental quantum limit
Searching for a weak signal at an unknown frequency is a canonical task in experiments probing fundamental physics such as gravitational-wave observatories and ultra-light dark matter haloscopes. These state-of-the-art sensors are limited by quantum noise arising from the fundamental uncertainty about the state of the device. Classically, frequency estimation suffers from a threshold effect in the signal-to-noise ratio such that weak signals are extremely hard to localise in frequency. We show …

Are Pixel-Wise Metrics Reliable for Sparse-View Computed Tomography Reconstruction?
Tianyu Lin, Xinran Li, Chuntung Zhuang, Qi Chen, Yuanhao Cai, Kai Ding, Alan L. Yuille, Zongwei Zhou
https://arxiv.org/abs/2506.02093

Are Pixel-Wise Metrics Reliable for Sparse-View Computed Tomography Reconstruction?
Widely adopted evaluation metrics for sparse-view CT reconstruction--such as Structural Similarity Index Measure and Peak Signal-to-Noise Ratio--prioritize pixel-wise fidelity but often fail to capture the completeness of critical anatomical structures, particularly small or thin regions that are easily missed. To address this limitation, we propose a suite of novel anatomy-aware evaluation metrics designed to assess structural completeness across anatomical structures, including large organs, …

This https://arxiv.org/abs/2402.05625 has been replaced.
link: https://scholar.google.com/scholar?q=a

Coded Many-User Multiple Access via Approximate Message Passing
We consider communication over the Gaussian multiple-access channel in the regime where the number of users grows linearly with the codelength. In this regime, schemes based on sparse superposition coding can achieve a near-optimal tradeoff between spectral efficiency and signal-to-noise ratio. However, these schemes are feasible only for small values of user payload. This paper investigates efficient schemes for larger user payloads, focusing on coded CDMA schemes where each user's information…

This https://arxiv.org/abs/2505.19945 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Signed Angle Rigid Graphs for Network Localization and Formation Control
Graph rigidity theory studies the capability of a graph embedded in the Euclidean space to constrain its global geometric shape via local constraints among nodes and edges, and has been widely exploited in network localization and formation control. In recent years, the traditional rigidity theory has been extended by considering new types of local constraints such as bearing, angle, ratio of distance, etc. Among them, the signed angle constraint received extensive attention since it is practic…

Derivation of CRB and Refined SINR Expressions for OTFS-RSMA LEO ISAC Systems
Bruno Felipe Costa, Taufik Abr\~ao
https://arxiv.org/abs/2506.02771 https://

Derivation of CRB and Refined SINR Expressions for OTFS-RSMA LEO ISAC Systems
This document provides detailed step-by-step derivations for the Cramér-Rao Bounds (CRB) for sensing parameters and the refined Signal-to-Interference-plus-Noise Ratio (SINR) expressions under imperfect Channel State Information (CSI) and imperfect Successive Interference Cancellation (SIC) for the Orthogonal Time Frequency Space (OTFS) Rate-Splitting Multiple Access (RSMA) framework presented in our main work "An Integrated OTFS-RSMA Framework for LEO Satellite ISAC: Modeling, Metrics, and Po…

This https://arxiv.org/abs/2504.09460 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Imprints of extra dimensions in eccentric eccentric extreme-mass-ratio inspirals gravitational waveforms
Studies regarding extra-dimensions have been of great interest in modern theoretical physics, including their observational consequences from future gravitational wave (GW) observatories. In this direction, extreme-mass-ratio inspirals (EMRIs), attracting considerable interest in GW astronomy and fundamental physics, can potentially provide a useful platform for the search of extra dimensions. In this paper, we examine a rotating braneworld black hole in the context of equatorial eccentric EMRI…

Golden Ratio Assisted Localization for Wireless Sensor Network
Hitesh Mohapatra
https://arxiv.org/abs/2506.22464 https://arxiv.org/pd…

Golden Ratio Assisted Localization for Wireless Sensor Network
This paper presents a novel localization algorithm for wireless sensor networks (WSNs) called Golden Ratio Localization (GRL), which leverages the mathematical properties of the golden ratio (phi 1.618) to optimize both node placement and communication range. GRL introduces phi-based anchor node deployment and hop-sensitive weighting using phi-exponents to improve localization accuracy while minimizing energy consumption. Through extensive simulations conducted on a 100 m * 100 m sensor field w…

Reappraising the Elatina series: Solar dynamo clocking and inference of orbital periods
F. Stefani, T. Weier, G. M. Horstmann, G. Mamatsashvili
https://arxiv.org/abs/2506.02628

Reappraising the Elatina series: Solar dynamo clocking and inference of orbital periods
We reconsider the 680 million year old Elatina series of sedimentary laminae from South Australia that show a remarkably stable periodicity with a main period of around 12 years, which is close to the Schwabe cycle, and a second period of 314 years that has been coined Elatina cycle. By analyzing the residuals of the series' minima from a linear trend, and deriving Dicke's ratio, we first show that the series exhibits a high degree of phase stability, except one single break point which may ind…

märker att @… har en rätt hög omtut/tut-ratio hos mig och tänker att det betyder att ni borde följa honom

Multi-year Polarimetric Monitoring of Four CHIME-Discovered Repeating Fast Radio Bursts with FAST
Yi Feng, Yong-Kun Zhang, Jintao Xie, Yuan-Pei Yang, Yuanhong Qu, Dengke Zhou, Di Li, Bing Zhang, Weiwei Zhu, Wenbin Lu, Jiaying Xu, Chenchen Miao, Shiyan Tian, Pei Wang, Ju-Mei Yao, Chen-Hui Niu, Jiarui Niu, Heng Xu, Jinchen Jiang, Dejiang Zhou, Zenan Liu, Chao-Wei Tsai, Zigao Dai, Xuefeng Wu, Fayin Wang, Jinlin Han, Kejia Lee, Renxin Xu, Yongfeng Huang, Yuanchuan Zou, Jinhuang Cao, Xiangl…

Multi-year Polarimetric Monitoring of Four CHIME-Discovered Repeating Fast Radio Bursts with FAST
In this study, we report multi-year polarization measurements of four repeating FRBs initially discovered by CHIME: FRBs~20190117A, 20190208A, 20190303A, and 20190417A. We observed the four repeating FRBs with FAST, detecting a total of 66 bursts. Two bursts from FRB~20190417A exhibit a circular polarization signal-to-noise ratio greater than 7, with the highest circular polarization fraction recorded at 35.7%. While the bursts from FRBs 20190208A and 20190303A are highly linearly polarized, th…

This https://arxiv.org/abs/2108.12692 has been replaced.
link: https://scholar.google.com/scholar?q=a

Integrable dynamics in projective geometry via dimers and triple crossing diagram maps on the cylinder
We introduce twisted triple crossing diagram maps, collections of points in projective space associated to bipartite graphs on the cylinder, and use them to provide geometric realizations of the cluster integrable systems of Goncharov and Kenyon constructed from toric dimer models. Using this notion, we provide geometric proofs that the pentagram map and the cross-ratio dynamics integrable systems are cluster integrable systems. We show that in appropriate coordinates, cross-ratio dynamics is d…

This https://arxiv.org/abs/2412.11989 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepe…

Test of lepton flavour universality in $W$-boson decays into electrons and $τ$-leptons using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
A measurement of the ratio of the branching fractions, $R_{τ/e} = B(W \to τν)/ B(W \to e ν)$, is performed using a sample of $W$ bosons originating from top-quark decays to final states containing $τ$-leptons or electrons. This measurement uses $pp$ collisions at $\sqrt{s}=13$ TeV, collected by the ATLAS experiment at the Large Hadron Collider during Run 2, corresponding to an integrated luminosity of 140 fb$^{-1}$. The $W \to τν_τ$ (with $τ\to e ν_e ν_τ$) and $W \to e ν_e$ decays …

A robust Likelihood Ratio Test for high-dimensional MANOVA -- with excellent performance
Carlos A. Coelho
https://arxiv.org/abs/2507.01261 https://

A robust Likelihood Ratio Test for high-dimensional MANOVA -- with excellent performance
The present paper answers the following questions related with high-dimensional manova: (i) is it possible to develop a likelihood ratio test for high-dimensional manova? (ii) would such test perform well? (iii) would it be able to outperform existing tests? (iv) would it be applicable to extremely small samples? (v) would it be applicable to non-normal random variables, as uniform, extremely skewed distributions, or even heavy tailed distributions with success? (vi) would it have a nice, rathe…

Residual Income Valuation and Stock Returns: Evidence from a Value-to-Price Investment Strategy
Ahmad Haboub, Aris Kartsaklas, Vasilis Sarafidis
https://arxiv.org/abs/2506.00206

Residual Income Valuation and Stock Returns: Evidence from a Value-to-Price Investment Strategy
We hypothesize that portfolio sorts based on the V/P ratio generate excess returns and consist of companies that are undervalued for prolonged periods. Results, for the US market show that high V/P portfolios outperform low V/P portfolios across horizons extending from one to three years. The V/P ratio is positively correlated to future stock returns after controlling for firm characteristics, which are well known risk proxies. Findings also indicate that profitability and investment add explan…

This https://arxiv.org/abs/2502.16356 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Analysis of In-cylinder Flow Structures and Turbulence in a Laboratory Scale Engine using Direct Numerical Simulations
In-cylinder flow structures and turbulence characteristics are investigated using direct numerical simulations (DNS) in a laboratory-scale engine at technically relevant engine speeds (1500 and 2500 rpm at full load). The data is computed for 12 compression-expansion cycles at each engine speed with initial conditions derived from precursor large eddy simulations (LES) validated against experimental data. Analysis of the tumble ratio indicates significant cycle-to-cycle variation, with lower va…

Design of a three-dimensional parallel-to-point imaging system based on inverse methods
Sanjana Verma, Lisa Kusch, Koondanibha Mitra, Martijn J. H. Anthonissen, Jan H. M. ten Thije Boonkkamp, Wilbert L. IJzerman
https://arxiv.org/abs/2507.02507

Design of a three-dimensional parallel-to-point imaging system based on inverse methods
We present an inverse method for designing a three-dimensional imaging system comprising of freeform optical surfaces. We impose an imaging condition on the optical map and combine it with the law of conservation of energy to conclude that the ratio of energy distributions at the source and target of an imaging system must be constant. A mathematical model for the design of a parallel-to-point system consisting of two freeform reflectors is presented. A Schwarzschild telescope, a classical desi…

This https://arxiv.org/abs/2411.11832 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Effects of Metallicity on Graphite, TiC, and SiC Condensation in Carbon Stars
From transmission electron microscopy and other laboratory studies of presolar grains, the implicit condensation sequence of carbon-bearing condensates in circumstellar envelopes of carbon stars is (from first to last) TiC-graphite-SiC. We use thermochemical equilibrium condensation calculations and show that the condensation sequence of TiC, graphite, and SiC depends on metallicity in addition to C/O ratio and total pressure. Calculations were performed for a characteristic carbon star ratio o…

Frequentist Uncertainties on Neural Density Ratios with wifi Ensembles
Sean Benevedes, Jesse Thaler
https://arxiv.org/abs/2506.00113 https://

Frequentist Uncertainties on Neural Density Ratios with wifi Ensembles
We introduce wifi ensembles as a novel framework to obtain asymptotic frequentist uncertainties on density ratios, with a particular focus on neural ratio estimation in the context of high-energy physics. When the density ratio of interest is a likelihood ratio conditioned on parameters, wifi ensembles can be used to perform simulation-based inference on those parameters. After training the basis functions f_i(x), uncertainties on the weights w_i can be straightforwardly propagated to the estim…

Integration of Wavelet Transform Convolution and Channel Attention with LSTM for Stock Price Prediction based Portfolio Allocation
Junjie Guo
https://arxiv.org/abs/2507.01973

Integration of Wavelet Transform Convolution and Channel Attention with LSTM for Stock Price Prediction based Portfolio Allocation
Portfolio allocation via stock price prediction is inherently difficult due to the notoriously low signal-to-noise ratio of stock time series. This paper proposes a method by integrating wavelet transform convolution and channel attention with LSTM to implement stock price prediction based portfolio allocation. Stock time series data first are processed by wavelet transform convolution to reduce the noise. Processed features are then reconstructed by channel attention. LSTM is utilized to predi…

This https://arxiv.org/abs/2503.19194 has been replaced.
initial toot: https://mastoxiv.page/@a…

Lorenz ratios of diagonal and Hall conductivities in a Dirac electron liquid
The magnetotransport properties of a two-dimensional electron liquid in graphene are analyzed in the hydrodynamic limit under isothermal conditions. It is shown that the Wiedemann-Franz law does not hold in this regime and that the Lorenz ratios constructed from the diagonal and Hall conductivities generally differ from each other. The breakdown of the Wiedemann-Franz law is most pronounced near charge neutrality, where the Lorenz ratio can exceed its nominal universal Sommerfeld value by an or…

This https://arxiv.org/abs/2504.09460 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Imprints of extra dimensions in eccentric eccentric extreme-mass-ratio inspirals gravitational waveforms
Studies regarding extra-dimensions have been of great interest in modern theoretical physics, including their observational consequences from future gravitational wave (GW) observatories. In this direction, extreme-mass-ratio inspirals (EMRIs), attracting considerable interest in GW astronomy and fundamental physics, can potentially provide a useful platform for the search of extra dimensions. In this paper, we examine a rotating braneworld black hole in the context of equatorial eccentric EMRI…

This https://arxiv.org/abs/2409.05693 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Photoluminescence-Based Gas Sensing with MoS2 Monolayers
Two-dimensional transition metal dichalcogenides (TMDs) are highly appealing for gas sensors, lab-on-a-chip devices and bio-sensing applications because of their strong light-matter interaction and high surface-to-volume ratio. The ability to grow these van der Waals materials on different substrates and waveguide geometries opens a horizon toward scalable on-chip photonic nanodevices. Here, we report on a versatile technique for real time remote optical gas sensing using two-dimensional TMDs. …

Aus irgendeinem Grund ist gerade die Sonos-Radio-Station "The Lighthouse", über die Brian Eno jede Menge unveröffentlichte Tracks abspielen läßt, gratis (man braucht halt ein Sonos-Gerät dazu), und ich höre mich da nun etwas durch.
DJ Food hat das ein paar Monate lang gemacht übrigens, und mitgeschrieben (Stand 2023):
ht…

Brian Eno – The Lighthouse, what’s on it?
I’ve been compiling this, off and on, all year, while listening to the 340+ unreleased tracks on Brian Eno‘s Sonos HD radio station, The Lighthouse. If I had the phone nearby I’d check what’s playing, make a note of the track number and year and write a short description. I was intrigued to see how often tracks repeated (not very often), how long it would take me to hear all of them (over 6 months) and what the ratio of good to average to bad was. It became quite addictive as I’d fill…

This https://arxiv.org/abs/2502.03783 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

UltraBones100k: A reliable automated labeling method and large-scale dataset for ultrasound-based bone surface extraction
Ultrasound-based bone surface segmentation is crucial in computer-assisted orthopedic surgery. However, ultrasound images have limitations, including a low signal-to-noise ratio, and acoustic shadowing, which make interpretation difficult. Existing deep learning models for bone segmentation rely primarily on costly manual labeling by experts, limiting dataset size and model generalizability. Additionally, the complexity of ultrasound physics and acoustic shadow makes the images difficult for hu…

SiO and a super-stellar C/O ratio in the atmosphere of the giant exoplanet WASP-121b
Thomas M. Evans-Soma, David K. Sing, Joanna K. Barstow, Anjali A. A. Piette, Jake Taylor, Joshua D. Lothringer, Henrique Reggiani, Jayesh M. Goyal, Eva-Maria Ahrer, Nathan J. Mayne, Zafar Rustamkulov, Tiffany Kataria, Duncan A. Christie, Cyril Gapp, Jiayin Dong, Daniel Foreman-Mackey, Soichiro Hattori, Mark S. Marley

SiO and a super-stellar C/O ratio in the atmosphere of the giant exoplanet WASP-121b
Refractory elements such as iron, magnesium, and silicon can be detected in the atmospheres of ultrahot giant planets. This provides an opportunity to quantify the amount of refractory material accreted during formation, along with volatile gases and ices. However, simultaneous detections of refractories and volatiles have proved challenging, as the most prominent spectral features of associated atoms and molecules span a broad wavelength range. Here, using a single JWST observation of the ultr…

This https://arxiv.org/abs/2506.01878 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Monte Carlo Simulation and Dosimetric Analysis of Gold Nanoparticles (AuNPs) in Breast Tissue
Precise radiation delivery is critical for effective radiotherapy, and gold nanoparticles (AuNPs) have emerged as promising tools to enhance local dose deposition while sparing the surrounding healthy tissue. In this study, the PENELOPE Monte Carlo code was used to investigate the dosimetry of AuNPs under different conditions and models. The Dose Enhancement Ratio (DER) was studied in water and breast tissue with spherical shapes and in agreement with previously published results. To further an…

This https://arxiv.org/abs/2407.20941 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csDS_…

Random-Order Interval Selection
In the problem of online unweighted interval selection, the objective is to maximize the number of non-conflicting intervals accepted by the algorithm. In the conventional online model of irrevocable decisions, there is an Omega(n) lower bound on the competitive ratio, even for randomized algorithms [Bachmann et al. 2013]. In a line of work that allows for revocable acceptances, [Faigle and Nawijn 1995] gave a greedy 1-competitive (i.e. optimal) algorithm in the real-time model, where intervals…

Density Ratio Permutation Tests with connections to distributional shifts and conditional two-sample testing
Alberto Bordino, Thomas B. Berrett
https://arxiv.org/abs/2505.24529

Density Ratio Permutation Tests with connections to distributional shifts and conditional two-sample testing
We introduce novel hypothesis tests to allow for statistical inference for density ratios. More precisely, we introduce the Density Ratio Permutation Test (DRPT) for testing $H_0: g \propto r f$ based on independent data drawn from distributions with densities $f$ and $g$, where the hypothesised density ratio $r$ is a fixed function. The proposed test employs an efficient Markov Chain Monte Carlo algorithm to draw permutations of the combined dataset according to a distribution determined by $r…

Stability and rigidity results of space-like hypersurface in the Minkowski space
Jianhua Chen, Haiyun Deng, Haiqin Xie, Jiabin Yin
https://arxiv.org/abs/2506.01012

Stability and rigidity results of space-like hypersurface in the Minkowski space
In this paper, we establish some rigidity theorems for space-like hypersurfaces in Minkowski space by using a Weinberger-type approach with P-functions and integral identities. Firstly, for space-like hypersurfaces $M$ represented as graphs $x_{n+1}=u(x)$ over domain $Ω\subset\mathbb R^n$, if higher-order mean curvature ratio $\frac{H_{k}}{H_l}(l

Huge anisotropic magneto-thermal switching in high-purity polycrystalline compensated metals
Poonam Rani, Yuto Watanabe, Takuma Shiga, Yuya Sakuraba, Hikaru Takeda, Minoru Yamashita, Ken-ichi Uchida, Aichi Yamashita, Yoshikazu Mizuguchi
https://arxiv.org/abs/2506.00427

Huge anisotropic magneto-thermal switching in high-purity polycrystalline compensated metals
Magneto-thermal transport is a promising physical property for thermal management applications. Magneto-thermal switching enables active control of heat flows, and a high switching ratio is desirable for improving performance. Here, we report on the observation of a huge magneto-thermal switching (MTS) effect in high-purity (5N) Pb polycrystalline wires, where magnetic fields perpendicular to the heat current direction are applied at low temperatures. At T = 3 K and B = 0.1 T, the measured ther…

This https://arxiv.org/abs/2411.13720 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csGT_…

Distortion of Multi-Winner Elections on the Line Metric: The Polar Comparison Rule
We study the problem of selecting a committee of size $k$ from a set of $m$ alternatives, based solely on the ordinal preferences of voters. Both voters and alternatives lie on the line metric, and the goal is to minimize a social cost function based on metric distances. While the distances to committee members fully determine the social cost, voting rules only have access to the ordinal preference list of each voter. The distortion of a voting rule is the worst-case ratio between the cost of t…

Line Aspect Ratio
Arash Vaezi
https://arxiv.org/abs/2506.20508 https://arxiv.org/pdf/2506.20508…

Line Aspect Ratio
We address the problem of covering a target segment $\overline{uv}$ using a finite set of guards $\mathcal{S}$ placed on a source segment $\overline{xy}$ within a simple polygon $\mathcal{P}$, assuming weak visibility between the target and source. Without geometric constraints, $\mathcal{S}$ may be infinite, as shown by prior hardness results. To overcome this, we introduce the {\it line aspect ratio} (AR), defined as the ratio of the \emph{long width} (LW) to the \emph{short width} (SW) of $\…

A Compartmental Model for Epidemiology with Human Behavior and Stochastic Effects
Christian Parkinson, Weinan Wang
https://arxiv.org/abs/2507.01046 https:/…

A Compartmental Model for Epidemiology with Human Behavior and Stochastic Effects
We propose a compartmental model for epidemiology wherein the population is split into groups with either comply or refuse to comply with protocols designed to slow the spread of a disease. Parallel to the disease spread, we assume that noncompliance with protocols spreads as a social contagion. We begin by deriving the reproductive ratio for a deterministic version of the model, and use this to fully characterize the local stability of disease free equilibrium points. We then append the determ…

Searching for intermediate mass ratio binary black hole mergers in the third observing run of LIGO-Virgo-KAGRA
Mark Ho-Yeuk Cheung, Digvijay Wadekar, Ajit Kumar Mehta, Tousif Islam, Javier Roulet, Emanuele Berti, Tejaswi Venumadhav, Barak Zackay, Matias Zaldarriaga
https://arxiv.org/abs/2507.01083

Searching for intermediate mass ratio binary black hole mergers in the third observing run of LIGO-Virgo-KAGRA
Intermediate mass ratio inspirals (IMRIs) of binary black holes with mass ratios $10^{-4}\lesssim q \lesssim 0.1$ are astrophysically interesting sources of gravitational waves. Mergers of intermediate-mass black holes (IMBHs) with stellar-mass black holes would be IMRIs, so their detection can help us probe the formation mechanisms of IMBHs. They can also help us perform precise tests of general relativity due to the presence of strong higher-order mode emission. We perform a search for aligne…

Multi-Branch DNN and CRLB-Ratio-Weight Fusion for Enhanced DOA Sensing via a Massive H$^2$AD MIMO Receiver
Feng Shu, Jiatong Bai, Di Wu, Wei Zhu, Bin Deng, Fuhui Zhou, Jiangzhou Wang
https://arxiv.org/abs/2506.23203

Multi-Branch DNN and CRLB-Ratio-Weight Fusion for Enhanced DOA Sensing via a Massive H$^2$AD MIMO Receiver
As a green MIMO structure, massive H$^2$AD is viewed as a potential technology for the future 6G wireless network. For such a structure, it is a challenging task to design a low-complexity and high-performance fusion of target direction values sensed by different sub-array groups with fewer use of prior knowledge. To address this issue, a lightweight Cramer-Rao lower bound (CRLB)-ratio-weight fusion (WF) method is proposed, which approximates inverse CRLB of each subarray using antenna number r…

Measurement of the Positive Muon Anomalous Magnetic Moment to 127 ppb
Aguillard, Albahri, Allspach, Annala, Badgley, Bae{\ss}ler, Bailey, Bailey, Barlas-Yucel, Barrett, Barzi, Bedeschi, Berz, Bhattacharya, Binney, Bloom, Bono, Bottalico, Bowcock, Braun, Bressler, Cantatore, Carey, Casey, Cauz, Chakraborty, Chapelain, Chappa, Charity, Chen, Cheng, Chislett, Chu, Chupp, Claessens, Confortini, Convery, Corrodi, Cotrozzi, Crnkovic, Dabagov, Debevec, Di Falco, Di Sciascio, Donati, Drendel, …

Measurement of the Positive Muon Anomalous Magnetic Moment to 127 ppb
A new measurement of the magnetic anomaly $a_μ$ of the positive muon is presented based on data taken from 2020 to 2023 by the Muon $g-2$ Experiment at Fermi National Accelerator Laboratory (FNAL). This dataset contains over 2.5 times the total statistics of our previous results. From the ratio of the precession frequencies for muons and protons in our storage ring magnetic field, together with precisely known ratios of fundamental constants, we determine $a_μ = 116\,592\,0710(162) \times 10^…

Winners vs. Losers: Momentum-based Strategies with Intertemporal Choice for ESG Portfolios
Ayush Jha, Abootaleb Shirvani, Ali Jaffri, Svetlozar T. Rachev, Frank J. Fabozzi
https://arxiv.org/abs/2505.24250

Winners vs. Losers: Momentum-based Strategies with Intertemporal Choice for ESG Portfolios
This paper introduces a state-dependent momentum framework that integrates ESG regime switching with tail-risk-aware reward-risk metrics. Using a dynamic programming approach and solving a finite-horizon Bellman equation, we construct long-short momentum portfolios that adjust to changing ESG sentiment regimes. Unlike traditional momentum strategies based on historical returns, our approach incorporates the Stable Tail Adjusted Return ratio and Rachev ratio to better capture downside risk in tu…

Canceling the elastic Poynting effect with geometry
M. Destrade, Y. Du, J. Blackwell, N. Colgan, V. Balbi
https://arxiv.org/abs/2506.03821 https://

Canceling the elastic Poynting effect with geometry
The Poynting effect is a paragon of nonlinear soft matter mechanics. It is the tendency (found in all incompressible, isotropic, hyperelastic solids) exhibited by a soft block to expand vertically when sheared horizontally. It can be observed whenever the length of the cuboid is at least four times its thickness. Here we show that the Poynting effect can be easily reversed and the cuboid can shrink vertically, simply by reducing this aspect ratio. In principle, this discovery means that for a g…

This https://arxiv.org/abs/2406.02448 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Tunable $t-t'-U$ Hubbard models in twisted square homobilayers
Square lattice Hubbard models with tunable hopping ratio $t'/t$ are highly promising for realizing a variety of quantum phases and for shedding light on key puzzles in correlated quantum materials, including higher-temperature superconductivity. We show that twisted square lattice homo-bilayers generically offer such tunability when the flat bands originate from the corner of the Brillouin zone. We reveal an emergent symmetry at low twist-angles, absent in single layers, that necessitates the v…

Hydrodynamic interactions of low-aspect-ratio oscillating panels in a tip-to-tip formation
Yu Pan, Yuanhang Zhu, Elizabeth Westfall, Daniel B. Quinn, Haibo Dong, George V. Lauder
https://arxiv.org/abs/2506.22612

Hydrodynamic interactions of low-aspect-ratio oscillating panels in a tip-to-tip formation
The vertical, tip-to-tip arrangement of neighboring caudal fins, common in densely packed fish schools, has received much less attention than staggered or side-by-side pairings. We explore this configuration using a canonical system of two trapezoidal plates (aspect ratio AR = 1.2) that pitch about their leading edges while heaving harmonically at a Strouhal number St = 0.45 and a reduced frequency k = 2.09. Direct numerical simulations based on an immersed-boundary method are conducted over a …

This https://arxiv.org/abs/2410.08862 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Test for LISA foreground Gaussianity and stationarity: extreme mass-ratio inspirals
Extreme Mass Ratio Inspirals (EMRIs) are key observational targets for the Laser Interferometer Space Antenna (LISA) mission. Unresolvable EMRI signals contribute to the formation of a gravitational wave background (GWB). Characterizing the statistical features of the GWB from EMRIs is of great importance, as EMRIs will ubiquitously affect large segments of the inference scheme. In this work, we apply a frequentist test for GWB Gaussianity and stationarity, exploring three astrophysically-motiv…

Nuclear Physics Confronts Relativistic Collisions Of Isobars
Giuliano Giacalone, Jiangyong Jia, Vittorio Som\`a, You Zhou, Anatoli Afanasjev, Massimiliano Alvioli, Benjamin Bally, Federica Capellino, Jean-Paul Ebran, Hannah Elfner, Fernando G. Gardim, Andr\'e V. Giannini, Fr\'ed\'erique Grassi, Eduardo Grossi, Jan Hammelmann, Andreas Kirchner, Dean Lee, Matthew Luzum, Hadi Mehrabpour, Emil G. Nielsen, Govert Nijs, Tamara Nik\v{s}i\'c, Jacquelyn Noronha-Hostler, Jean-Yve…

Nuclear Physics Confronts Relativistic Collisions Of Isobars
High-energy collisions involving the $A=96$ isobars $^{96}$Zr and $^{96}$Ru have been performed in 2018 at Brookhaven National Laboratory's Relativistic Heavy Ion Collider (RHIC) as a means to search for the chiral magnetic effect in QCD. This would manifest itself as specific deviations from unity in the ratio of observables taken between $^{96}$Zr+$^{96}$Zr and $^{96}$Ru+$^{96}$Ru collisions. Measurements of such ratios (released at the end of 2021) indeed reveal deviations from unity, but th…

A Precise Metallicity and Carbon-to-Oxygen Ratio for a Warm Giant Exoplanet from its Panchromatic JWST Emission Spectrum
Lindsey S. Wiser, Taylor J. Bell, Michael R. Line, Everett Schlawin, Thomas G. Beatty, Luis Welbanks, Thomas P. Greene, Vivien Parmentier, Matthew M. Murphy, Jonathan J. Fortney, Kenny Arnold, Nishil Mehta, Kazumasa Ohno, Sagnick Mukherjee

A Precise Metallicity and Carbon-to-Oxygen Ratio for a Warm Giant Exoplanet from its Panchromatic JWST Emission Spectrum
WASP-80 b, a warm sub-Jovian (equilibrium temperature ~820 K, 0.5 Jupiter masses), presents an opportunity to characterize a rare gas giant exoplanet around a low-mass star. In addition, its moderate temperature enables its atmosphere to host a range of carbon and oxygen species (H$_2$O, CH$_4$, CO, CO$_2$, NH$_3$). In this paper, we present a panchromatic emission spectrum of WASP-80 b, the first gas giant around a late K/early M-dwarf star and the coolest planet for which the James Webb Space…

This https://arxiv.org/abs/2505.18117 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qbi…

Multi-Modal Spectral Parametrization Method (MMSPM) for analyzing EEG activity with distinct scaling regimes
Aperiodic neural activity has been the subject of intense research interest lately as it could reflect on the cortical excitation/inhibition ratio, which is suspected to be affected in numerous clinical conditions. This phenomenon is characterized via the aperiodic scaling exponent $β$, equal to the spectral slope following log-log transformation of power spectra. Despite recent progress, however, most current methods do not take into consideration the plausible multimodal nature in the power …

This https://arxiv.org/abs/2505.14456 has been replaced.
initial toot: https://mastoxiv.page/@…

Influence of microscopic parameters on phase behavior of a cell model with Curie-Weiss interaction
We have investigated the effect of changing two microscopic parameters in a cell model with Curie-Weiss-type interaction on its phase behavior, namely the cell volume and ratio between repulsion and attraction intensities. The results are based on an exact solution previously derived for this model in the grand canonical ensemble. At sufficiently low temperatures, the cell model exhibits multiple first-order phase transitions. Varying the cell volume and the repulsion-to-attraction ratio, we re…

Time-frequency Imprints of Extreme Mass-Ratio Inspirals in Confusion Gravitational Wave Background
Lingyuan Ji, Liang Dai
https://arxiv.org/abs/2506.17380 …

Time-frequency Imprints of Extreme Mass-Ratio Inspirals in Confusion Gravitational Wave Background
Detecting individual extreme-mass-ratio inspirals (EMRIs) is a major science goal of future space-based gravitational wave observatories such as Laser Interferometer Space Antenna (LISA) and TianQin. However, matched-filtering can be challenging as waveform templates are required to be accurate over tens of thousands of orbits. We introduce the time-frequency spectrum as an alternative observable that can be exploited to reveal the chirping of EMRIs at the population level. We analytically calc…

Probing Dark Matter Spike with Gravitational Waves from Early EMRIs in the Milky Way Center
Chen Feng, Yong Tang, Yue-Liang Wu
https://arxiv.org/abs/2506.02937

Probing Dark Matter Spike with Gravitational Waves from Early EMRIs in the Milky Way Center
Cold dark matter may form dense structures around supermassive black holes (SMBHs), significantly influencing their local environments. These dense regions are ideal sites for the formation of extreme mass-ratio inspirals (EMRIs), in which stellar-mass compact objects gradually spiral into SMBH, emitting gravitational waves (GWs). Space-based gravitational-wave (GW) observatories such as LISA and Taiji will be sensitive to these signals, including early-stage EMRIs (E-EMRIs) that persist in the…

This https://arxiv.org/abs/2503.09977 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csIT_…

Quadratic Transform for Fractional Programming in Signal Processing and Machine Learning
Fractional programming (FP) is a branch of mathematical optimization that deals with the optimization of ratios. It is an invaluable tool for signal processing and machine learning, because many key metrics in these fields are fractionally structured, e.g., the signal-to-interference-plus-noise ratio (SINR) in wireless communications, the Cramér-Rao bound (CRB) in radar sensing, the normalized cut in graph clustering, and the margin in support vector machine (SVM). This article provides a comp…

This https://arxiv.org/abs/2410.11470 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csDS_…

Almost Optimal Fully Dynamic $k$-Center Clustering with Recourse
In this paper, we consider the \emph{metric $k$-center} problem in the fully dynamic setting, where we are given a metric space $(V,d)$ evolving via a sequence of point insertions and deletions and our task is to maintain a subset $S \subseteq V$ of at most $k$ points that minimizes the objective $\max_{x \in V} \min_{y \in S}d(x, y)$. We want to design our algorithm so that we minimize its \emph{approximation ratio}, \emph{recourse} (the number of changes it makes to the solution $S$), and \em…

Transmutation of $^{16}$O and $^{20}$Ne at the Large Hadron Collider
Govert Nijs, Wilke van der Schee
https://arxiv.org/abs/2507.01659 https://

Transmutation of $^{16}$O and $^{20}$Ne at the Large Hadron Collider
In July 2025 the Large Hadron Collider (LHC) will collide $^{16}$O$^{16}$O and $^{20}$Ne$^{20}$Ne isotopes in a quest to understand the physics of ultrarelativistic light ion collisions. One particular feature is that there are many smaller isotopes with the exact same charge over mass ratio that potentially can be produced and contaminate the beam composition. Using the Trajectum framework together with the GEMINI code we provide an estimate of the production cross-section and its consequences…

A class of high-beta, large-aspect-ratio quasiaxisymmetric Palumbo-like configurations
Andrew Brown, Wrick Sengupta, Nikita Nikulsin, Amitava Bhattacharjee
https://arxiv.org/abs/2506.17528

A class of high-beta, large-aspect-ratio quasiaxisymmetric Palumbo-like configurations
The space of high-beta, approximately quasiaxisymmetric, large-aspect-ratio stellarator configurations is explored using an inverse coordinate approach and a quadratic polynomial ansatz for the flux function, following the method of Palumbo, extended by Hernandes and Clemente. This approach yields a system of nonlinear ODEs that, when solved, give equilibria exhibiting positive or negative triangularity, cusps, and (in an extreme limit) current singularities. It is shown that a cubic ansatz may…

Preliminary analysis of a potential asteroid from the IASC campaign using Pan-STARRS data
Dharanesh Palaniappan
https://arxiv.org/abs/2506.02963 https://…

Preliminary analysis of a potential asteroid from the IASC campaign using Pan-STARRS data
In this paper, we present a detailed analysis of a potential asteroid candidate, ISP0010, using images provided by the Pan-STARRS 1 telescope as part of our participation in the International Astronomical Search Collaboration campaign. IASC is one of the leading contributors to the detection of various Near-Earth Objects and Main Belt asteroids. Using Astrometrica software we analysed those images and extracted their key parameters such as signal-to-noise ratio, right ascension, declination, fl…

My pet peeve in student (or generally academic) presentations: Distorted images. It’s not that difficult to keep the aspect ratio when resizing images, is it?! Don’t they see it or don’t they care? 🧐

Effects of thrust, tip-speed ratio, and time variations on wind-turbine wakes at high Reynolds numbers
Nathaniel J. Wei, Adina Y. Fleisher, John W. Kurelek, Marcus N. Hultmark
https://arxiv.org/abs/2505.22788

Effects of thrust, tip-speed ratio, and time variations on wind-turbine wakes at high Reynolds numbers
The evolution of rotor wakes is an important problem for a wide range of wind-energy and aerodynamic applications, and is of particular relevance to dynamic wake control strategies for wind farms. This study aims to clarify the influence of turbine thrust and tip-speed ratio on tip-vortex breakdown and the evolution of the near wake. Scaling arguments show that these parameters contribute to the wake dynamics in distinct ways, and that neither thrust nor tip-speed ratio are alone sufficient to …

This https://arxiv.org/abs/2412.04249 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Approach to the separatrix with eccentric orbits
Eccentric binary compact mergers are prime targets of current and future gravitational wave observatories. In the small mass ratio expansion, post-adiabatic inspirals have been modeled up to the separatrix, where first-principle modeling currently ends. In this paper, we derive the analytic late time solution to the adiabatic inspiral in terms of self-force coefficients at the separatrix. We identify the role of the Lambert $W_{-1}$ function as a key mathematical ingredient in the approach to t…

On the Penumbra-to-Umbra Ratio from 1660 to 1676
Nadezhda Zolotova, Mikhail Vokhmyanin
https://arxiv.org/abs/2506.18361 https://arxiv…

On the Penumbra-to-Umbra Ratio from 1660 to 1676
Sunspot engravings made in the Maunder minimum are used to evaluate the fine structure of sunspots. Based on 78 images of the full solar disk and 77 images of individual sunspots, we have evaluated the ratio of penumbral-to-umbral area (P/U) to be 4.2 $\pm$ 2.5 and 3.8 $\pm$ 2.3, respectively. These results are consistent with previous estimates before, during, and after the Maunder minimum, as well as with the P/U ratio observed in the largest sunspot groups in solar cycle 24. This suggests th…

Simple analytical approach to the analysis of plasmonic phenomena in dome-shaped protrusions and depressions on metal surfaces
Anton V. Dyshlyuk, Oleg B. Vitrik
https://arxiv.org/abs/2507.01302

Simple analytical approach to the analysis of plasmonic phenomena in dome-shaped protrusions and depressions on metal surfaces
A simple and efficient analytical model is proposed for analyzing plasmonic phenomena arising in nanoscale defects on metal surfaces, specifically low aspect ratio dome-shaped protrusions and depressions. The model enables the calculation, using a straightforward formula, of the polarization charge density on the defect surface and its associated plasmonic near-field, accurately accounting for the defect geometry and incident light wave parameters. It further effectively incorporates the resona…

This https://arxiv.org/abs/2409.16349 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

No Evidence of a Dichotomy in the Elliptical Galaxy Population
The advent of large integral field spectroscopic surveys has found that elliptical galaxies (EGs) can be classified into two classes: the fast rotators (whose kinematics are dominated by rotation) and the slow rotators (which exhibit slow or no rotation pattern). It is often suggested that while the slow rotators typically have boxy isophotal shapes, have a high $α$-to-iron abundance ratio, and are quite massive, the fast rotators often exhibit the opposite properties (that is, having disky is…

Local Ambiguity Shaping for Doppler-Resilient Sequences Under Spectral and PAPR Constraints
Shi He, Lingsheng Meng, Yao Ge, Yong Liang Guan, David Gonz\'alez G., Zilong Liu
https://arxiv.org/abs/2506.01637

Local Ambiguity Shaping for Doppler-Resilient Sequences Under Spectral and PAPR Constraints
This paper focuses on designing Doppler-resilient sequences with low local Ambiguity Function (AF) sidelobes, subject to certain spectral and Peak-to-Average Power Ratio (PAPR) constraints. To achieve this, we propose two distinctoptimization algorithms: (i) an Alternating Minimization (AM) algorithm for superior Weighted Peak Sidelobe Level (WPSL) minimization, and (ii) a low-complexity Augmented Lagrangian-assisted Majorization Minimization (ALaMM) algorithm with effective WPSL suppression. T…

On the Phase-Magnitude Relation in Gravitational Lensing: Reformulation and Applications of the Kramers-Kronig relation
Teruaki Suyama, Shasvath J. Kapadia
https://arxiv.org/abs/2506.02430

On the Phase-Magnitude Relation in Gravitational Lensing: Reformulation and Applications of the Kramers-Kronig relation
It is known that the amplification factor, defined as the ratio of the lensed to the unlensed waveform in the frequency domain, satisfies the Kramers-Kronig (KK) relation, which connects the real and imaginary parts of the amplification factor for any lensing signal. In this work, we reformulate the KK relation in terms of the magnitude and phase of the amplification factor. Unlike the original formulation, the phase cannot be uniquely determined from the magnitude alone due to the possible pre…

IMA-Catcher: An IMpact-Aware Nonprehensile Catching Framework based on Combined Optimization and Learning
Francesco Tassi (Human-Robot Interfaces and Interaction Lab., Istituto Italiano di Tecnologia, Italy), Jianzhuang Zhao (Human-Robot Interfaces and Interaction Lab., Istituto Italiano di Tecnologia, Italy), Gustavo J. G. Lahr (Human-Robot Interfaces and Interaction Lab., Istituto Italiano di Tecnologia, Italy), Luna Gava (Event-Driven Perception for Robotics Lab, Istituto Italiano d…

IMA-Catcher: An IMpact-Aware Nonprehensile Catching Framework based on Combined Optimization and Learning
Robotic catching of flying objects typically generates high impact forces that might lead to task failure and potential hardware damages. This is accentuated when the object mass to robot payload ratio increases, given the strong inertial components characterizing this task. This paper aims to address this problem by proposing an implicitly impact-aware framework that accomplishes the catching task in both pre- and post-catching phases. In the first phase, a motion planner generates optimal tra…

Probing CP and flavor violation in neutral kaon decays with ALPs
Reuven Balkin, Stefania Gori, Christiane Scherb
https://arxiv.org/abs/2507.01947 https://

Probing CP and flavor violation in neutral kaon decays with ALPs
We analyze the three-body decays of the long-lived neutral kaon $K_L \to ππa$, where $a$ is an axion-like particle (ALP), and compare them to the two-body decay $K_L \to π^0 a$. While the latter requires both flavor violation (FV) and $CP$ violation (CPV), the former can proceed via FV alone, allowing the ratio of decay rates to serve as a probe of CPV of the underlying UV theory. We emphasize the importance of weak-interaction-induced contributions, often neglected in recent calculations. W…

A planet-host ratio relation to synthesize microlensing and transiting exoplanet demography from Roman
Kathryn Edmondson, Eamonn Kerins
https://arxiv.org/abs/2506.24004

A planet-host ratio relation to synthesize microlensing and transiting exoplanet demography from Roman
The NASA Nancy Grace Roman Space Telescope (Roman) will be the first survey able to detect large numbers of both cold and hot exoplanets across Galactic distances: ~1,400 cold exoplanets via microlensing and ~200,000 hot, transiting planets. Differing sensitivities to planet bulk properties between the microlensing and transit methods require relations like a planet mass-radius relation (MRR) to mediate. We propose using instead a planet-host ratio relation (PHRR) to couple directly microlensin…

Transient star B/R ratio and star formation in $z\gtrsim 1$ lensed galaxies
Sung Kei Li, Jose M. Palencia, Jose M. Diego, Jeremy Lim, Patrick L. Kelly, Ashish K. Meena, James Nianias, Hayley Williams, Liliya L. R. Williams, Adi Zitrin
https://arxiv.org/abs/2506.17565

Transient star B/R ratio and star formation in $z\gtrsim 1$ lensed galaxies
The extreme magnification from galaxy clusters and microlenses therein allows the detection of individual, luminous stars in lensed galaxies as transient events, and hence provides a valuable window into the high mass stellar population in $z>1$ galaxies. As these bright stars can only be formed at specific ages, the relative abundance of transient events at blue (B) and red (R) optical wavelengths ($B/R$ ratio) can provide insights into the star formation history of lensed galaxies. Here, we f…

Double Hamiltonian Hopf Bifurcation: normalization and normal form non-integrability
L. M. Lerman, R. Mazrooei-Sebdani, N. E. Kulagin
https://arxiv.org/abs/2505.23991

Double Hamiltonian Hopf Bifurcation: normalization and normal form non-integrability
The double Hamiltonian Hopf bifurcation is studied, i.e. a generic two-parametric unfolding of a smooth Hamiltonian system with four degrees of freedom which has at the critical value of parameters the equilibrium with two pairs of double non semi-simple pure imaginary eigenvalues $\pm iω_1,$ $\pm iω_2,$ $ω_1\ne ω_2$ under an assumption of absence of strong resonances between $ω_1,ω_2$. We derive the normal form of the unfolding, when the ratio $ω_1/ω_2$ is irrational and study the trun…

Monte Carlo Simulation and Dosimetric Analysis of Gold Nanoparticles (AuNPs) in Breast Tissue
Pedro Teles, Catarina Dias, Jo\~ao H. Belo, C\'elia Sousa, Paula Boaventura, Isabel Bravo, Jo\~ao Santos, Marissa Rylander
https://arxiv.org/abs/2506.01878

Monte Carlo Simulation and Dosimetric Analysis of Gold Nanoparticles (AuNPs) in Breast Tissue
Precise radiation delivery is critical for effective radiotherapy, and gold nanoparticles (AuNPs) have emerged as promising tools to enhance local dose deposition while sparing the surrounding healthy tissue. In this study, the PENELOPE Monte Carlo code was used to investigate the dosimetry of AuNPs under different conditions and models. The Dose Enhancement Ratio (DER) was studied in water and breast tissue with spherical shapes and in agreement with previously published results. To further an…

Wasserstein Distributionally Robust Adaptive Beamforming
Kiarash Hassas Irani, Sergiy A. Vorobyov, Yongwei Huang
https://arxiv.org/abs/2506.01154 https://

Wasserstein Distributionally Robust Adaptive Beamforming
Distributionally robust optimization (DRO)-based robust adaptive beamforming (RAB) enables enhanced robustness against model uncertainties, such as steering vector mismatches and interference-plus-noise covariance matrix estimation errors. Existing DRO-based RAB methods primarily rely on uncertainty sets characterized by the first- and second-order moments. In this work, we propose a novel Wasserstein DRO-based beamformer, using the worst-case signal-to-interference-plus-noise ratio maximizatio…

Long-term investigation of an open cluster Berkeley 65
Tarak Chand, Saurabh Sharma, Koshvendra Singh, Jeewan Pandey, Aayushi Verma, Harmeen Kaur, Mamta, Manojit Chakraborty, Devendra K. Ojha, Ajay Kumar Singh
https://arxiv.org/abs/2505.24240

Long-term investigation of an open cluster Berkeley 65
We present a decade-long investigation of a poorly studied cluster, Berkeley 65 (Be 65), using deep optical data from the telescopes of ARIES, Nainital Observatory. We estimate its radius ($R_{cluster}$ = 1.6$^{'}$, aspect ratio of $\sim$1.1), distance (2.0 $\pm$ 0.1 kpc) and age ($\sim$160 Myrs). A clear turn-off point at $\sim$1.7 M$_\odot$ in the mass function suggests the escape of low-mass stars, and the lower photometric mass compared to the dynamical mass indicates ongoing disruption due…

Hydrodynamic simulations of black hole evolution in AGN discs II: inclination damping for partially embedded satellites
Henry Whitehead, Connar Rowan, Bence Kocsis
https://arxiv.org/abs/2505.23899

Hydrodynamic simulations of black hole evolution in AGN discs II: inclination damping for partially embedded satellites
We investigate the evolution of black holes on orbits with small inclinations ($i < 2^\circ$) to the gaseous discs of active galactic nuclei. We perform 3D adiabatic hydrodynamic simulations within a shearing frame, studying the damping of inclination by black hole-gas gravitation. We find that for objects with $i<3H_0R_0^{-1}$, where $H_0R_0^{-1}$ is the disc aspect ratio, the inclination lost per midplane crossing is proportional to the inclination preceding the crossing, resulting in a net e…

Constraint on the Deviation of Kerr Metric via Bumpy Parameterization and Particle Swarm Optimization in Extreme Mass-Ratio Inspirals
Xiaobo Zou, Xingyu Zhong, Wen-Biao Han, Soumya D. Mohanty
https://arxiv.org/abs/2506.21955

Constraint on the Deviation of Kerr Metric via Bumpy Parameterization and Particle Swarm Optimization in Extreme Mass-Ratio Inspirals
Measurement of deviations in the Kerr metric using gravitational wave (GW) observations will provide a clear signal of new Physics. Previous studies have developed multiple parameterizations (e.g. ``bumpy" spacetime) to characterize such deviations in extreme mass ratio inspirals (EMRI) and employed analyses based on the Fisher information matrix (FIM) formalism to quantify the constraining power of space-borne GW detectors like LISA and Tianqin, e.g., achieving a constraint sensitivity levels …

Optimising Photothermal Silver Nanoparticles for Efficient Light-Activated Shape Memory Response in AgNP-Polymer Composites
K. Krizmane, M. Dile, E. Einbergs, V. Vitola, A. Knoks, B. Hamawandi, A. Zolotarjovs
https://arxiv.org/abs/2507.00620

Optimising Photothermal Silver Nanoparticles for Efficient Light-Activated Shape Memory Response in AgNP-Polymer Composites
The study presents the synthesis and integration of silver nanoparticles (AgNPs) into a polyurethane (PU) matrix to create a light-activated shape memory polymer (SMP). AgNPs were synthesized using a microwave-assisted solvothermal method with polyvinylpyrrolidone (PVP) as a stabilizer, where varying the molecular weight of PVP and the AgNO3/PVP ratio influenced nanoparticle size and distribution. Characterisation via scanning electron microscopy (SEM) and dynamic light scattering (DLS) confirm…

Surrogate models to optimize plasma assisted atomic layer deposition in high aspect ratio features
Angel Yanguas-Gil, Jeffrey W. Elam
https://arxiv.org/abs/2506.09313

Surrogate models to optimize plasma assisted atomic layer deposition in high aspect ratio features
In this work we explore surrogate models to optimize plasma enhanced atomic layer deposition (PEALD) in high aspect ratio features. In plasma-based processes such as PEALD and atomic layer etching, surface recombination can dominate the reactivity of plasma species with the surface, which can lead to unfeasibly long exposure times to achieve full conformality inside nanostructures like high aspect ratio vias. Using a synthetic dataset based on simulations of PEALD, we train artificial neural ne…

Wealth Thermalization Hypothesis
Klaus M. Frahm, Dima L. Shepelyansky
https://arxiv.org/abs/2506.17720 https://arxiv.org/pdf/2506.177…

Wealth Thermalization Hypothesis
We introduce the wealth thermalization hypothesis according to which the wealth shared in a country or the whole world is described by the Rayleigh-Jeans thermal distribution with two conserved quantities of system wealth and norm or number of agents. This distribution depends on a dimensional parameter being the ratio of system total wealth and its dispersion range determined by highest revenues. At relatively small values of this ratio there is a formation of the Rayleigh-Jeans condensate, we…

This https://arxiv.org/abs/2310.16207 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_sta…

Propensity weighting plus adjustment in proportional hazards model is not doubly robust
Recently, it has become common for applied works to combine commonly used survival analysis modeling methods, such as the multivariable Cox model and propensity score weighting, with the intention of forming a doubly robust estimator of an exposure effect hazard ratio that is unbiased in large samples when either the Cox model or the propensity score model is correctly specified. This combination does not, in general, produce a doubly robust estimator, even after regression standardization, whe…

On Linking Planet Formation Models, Protoplanetary Disk Properties, and Mature Gas Giant Exoplanet Atmospheres
Adina D. Feinstein, Richard A. Booth, Jennifer B. Bergner, Joshua D. Lothringer, Elisabeth C. Matthews, Luis Welbanks, Yamila Miguel, Bertram Bitsch, Linn E. J. Eriksson, James Kirk, Stefan Pelletier, Anna B. T. Penzlin, Anjali A. A. Piette, Caroline Piaulet-Ghorayeb, Kamber Schwarz, Diego Turrini, Lorena Acu\~na-Aguirre, Eva-Maria Ahrer, Madyson G. Barber, Jonathan Brande, Ar…

On Linking Planet Formation Models, Protoplanetary Disk Properties, and Mature Gas Giant Exoplanet Atmospheres
Measuring a single elemental ratio (e.g., carbon-to-oxygen) provides insufficient information for understanding the formation mechanisms and evolution that affect our observations of gas giant planet atmospheres. Although the fields of planet formation, protoplanetary disks, and exoplanets are well established and interconnected, our understanding of how to self-consistently and accurately link the theoretical and observational aspects of these fields together is lacking. To foster interdiscipl…

Existence of nuclear modifications on longitudinal-transverse structure function ratio
S. Kumano
https://arxiv.org/abs/2506.18305 https://

Existence of nuclear modifications on longitudinal-transverse structure function ratio
It has been assumed that nuclear modification does not exist in the longitudinal-transverse structure function ratio $R_N=F_L^N/(2xF_1^N)$ in lepton deep inelastic scattering. This assumption is widely used in obtaining structure functions of the ``nucleon" from nuclear data such as the deuteron ones. However, nuclear modifications do exist theoretically at least at medium- and large-$x$ regions because nucleons in a nucleus move in any direction, which is not necessary the longitudinal directi…

Orientation dynamics of a spheroid in the simple shear flow of a weakly elastic fluid
Pavan Kumar Singeetham, Deepak Madival, Piyush Garg, Ganesh Subramanian
https://arxiv.org/abs/2505.23361

Orientation dynamics of a spheroid in the simple shear flow of a weakly elastic fluid
We investigate the orientation dynamics of a neutrally buoyant spheroid, of an arbitrary aspect ratio ($κ$), freely rotating in a weakly viscoelastic fluid undergoing simple shear flow. Weak elasticity is characterized by a small but finite Deborah number ($De$), and the suspending fluid rheology is therefore modeled as a second-order fluid, with the constitutive equation involving a material parameter $ε$ related to the ratio of the first and second normal stress differences; polymer solutio…

The Condition Number in Phase Retrieval from Intensity Measurements
Haiyang Peng, Deren Han, Meng Huang
https://arxiv.org/abs/2506.22053 https://

The Condition Number in Phase Retrieval from Intensity Measurements
This paper investigates the stability of phase retrieval by analyzing the condition number of the nonlinear map $Ψ_{\boldsymbol{A}}(\boldsymbol{x}) = \bigl(\lvert \langle {\boldsymbol{a}}_j, \boldsymbol{x} \rangle \rvert^2 \bigr)_{1 \le j \le m}$, where $\boldsymbol{a}_j \in \mathbb{H}^n$ are known sensing vectors with $\mathbb{H} \in \{\mathbb{R}, \mathbb{C}\}$. For each $p \ge 1$, we define the condition number $β_{Ψ_{\boldsymbol{A}}}^{\ell_p}$ as the ratio of optimal upper and lower Lipsc…

Requirements on bandpass resolution and measurement precision for LiteBIRD
S. Giardiello, A. Carones, T. Ghigna, L. Pagano, F. Piacentini, L. Montier, R. Takaku, E. Calabrese, D. Adak, E. Allys, A. Anand, J. Aumont, M. Ballardini, A. J. Banday, R. B. Barreiro, N. Bartolo, S. Basak, M. Bersanelli, A. Besnard, M. Bortolami, T. Brinckmann, F. J. Casas, K. Cheung, M. Citran, L. Clermont, F. Columbro, A. Coppolecchia, F. Cuttaia, P. de Bernardis, E. de la Hoz, M. De Lucia, S. Della Torre, E…

Requirements on bandpass resolution and measurement precision for LiteBIRD
In this work, we study the impact of an imperfect knowledge of the instrument bandpasses on the estimate of the tensor-to-scalar ratio $r$ in the context of the next-generation LiteBIRD satellite. We develop a pipeline to include bandpass integration in both the time-ordered data (TOD) and the map-making processing steps. We introduce the systematic effect by having a mismatch between the ``real'', high resolution bandpass $τ$, entering the TOD, and the estimated one $τ_s$, used in the map-ma…

On the origin of short-lived cocoon in 3C84: powered by tidal disruption events ?
Nozomu Kawakatu, Motoki Kino, Keiichi Wada
https://arxiv.org/abs/2506.23317

On the origin of short-lived cocoon in 3C84: powered by tidal disruption events ?
We evaluated the jet power and the density of ambient matter in 3C 84 by using the momentum balance along the jet axis and the transonic condition for the cocoons observed at two different scales (approximately 1 and 6 parsec scales). For the inner cocoon, we precisely determined the ratio of jet power to ambient density $L_{\rm j}/n_{\rm a}$ to be $(0.3-0.7)\times 10^{43}\,{\rm erg}\,{\rm s}^{-1}\,{\rm cm}^3$. Similarly, for the outer cocoon, we found that this value is more than an order of m…

Helical flows spontaneously generated by salt fingers
Adrian E. Fraser, Adrian van Kan, Edgar Knobloch, Keith Julien, Chang Liu
https://arxiv.org/abs/2506.22581

Helical flows spontaneously generated by salt fingers
We study the dynamics of salt fingers in the regime of slow salinity diffusion (small inverse Lewis number) and strong stratification (large density ratio), focusing on regimes relevant to Earth's oceans. Using three-dimensional direct numerical simulations in periodic domains, we show that salt fingers exhibit rich, multiscale dynamics in this regime, with vertically elongated fingers that are twisted into helical shapes at large scales by mean flows and disrupted at small scales by isotropic …

Likelihood Ratio test for Poisson graph
Chen Shuyan, Liu Xin, Wang Shaoli
https://arxiv.org/abs/2506.18778 https://arxiv.org/pdf/2506…

Likelihood Ratio test for Poisson graph
Directed acyclic graphs are widely used to describe the causal effects among random variables, and the inference of those causal effects has become an popular topic in statistics and machine learning, and has wide applications in neuroinformatics, bioinformatics and so on. However, most studies focus on the estimation or inference of the directional relations among continuous random variables, those among discrete random variables have not gained much attentions. In this article we focus on the…

Lagrangian Finite-Time Fluctuation Relation in isotropic turbulence
Hanxun Yao, Tamer A. Zaki, Charles Meneveau
https://arxiv.org/abs/2506.23336 https://…

Lagrangian Finite-Time Fluctuation Relation in isotropic turbulence
The entropy generation rate in turbulence can be defined using the energy cascade rate as described in the scale-integrated Kolmogorov-Hill equation at a specified length scale. The fluctuation relation (FR) from non-equilibrium thermodynamics, which predicts exponential behaviour of the ratio of probability densities for positive and negative entropy production rates, was confirmed in prior work \citep{yao2023entropy}, but under certain limiting assumptions. We here examine the applicability o…

Line ratio identification of external photoevaporation
Tyger Peake, Thomas J. Haworth, Mari-Liis Aru, William J. Henney
https://arxiv.org/abs/2506.19788 ht…

Line ratio identification of external photoevaporation
External photoevaporation of protoplanetary discs, by massive O stars in stellar clusters, is thought to be a significant process in the evolution of a disc. It has been shown to result in significant mass loss and disc truncation, ultimately reducing the lifetime of the discs, and possibly affecting potential planet populations. It is a well-studied process in the Orion Nebula Cluster (ONC) where the cometary morphology of proplyds is spatially resolvable due to its proximity to Earth. However…

Computational simulation of thermal processes in ncs production plants
Pablo Cortes, Omar Lopez, Ramiro Medina, Gerardo Gordillo, Javier Guevara
https://arxiv.org/abs/2506.20885

Computational simulation of thermal processes in ncs production plants
This paper develops a computational simulation of the fluid dynamics and heat transfer phenomena that occur inside combustion chamber, and flat and semispherical open evaporators used in NCS non-centrifugal sugar industry. The study estimates the effect of primary/secondary air ratio and excess air in the combustion chamber performance resulting in an optimal value of 1.3 for the equivalence ratio in the lower section of combustion chamber. The influence of both mechanisms of heat transfer in t…

Are Helium Atmospheres Hiding as Volatile-rich in Current Exoplanet Analysis Frameworks?
Julien de Wit, Aaron Householder, Prajwal Niraula
https://arxiv.org/abs/2506.22537

Are Helium Atmospheres Hiding as Volatile-rich in Current Exoplanet Analysis Frameworks?
The increasing number of detailed exoplanet observations offers an opportunity to refine our analyses and interpretations, and uncover previously-hidden trends. One such trend is unexpectedly high water abundances ($\sim$1$-$10\%) for several hot Jupiters. Here, we show that such atmospheres may instead be helium-rich, and the perceived high water abundances simply biases in analyses compensating for ``ad hocly'' fixed helium-to-hydrogen ratio (He/H$_2$ = 0.157). As transmission spectra constra…

Dynamical quasinormal mode excitation
Marina De Amicis, Enrico Cannizzaro, Gregorio Carullo, Laura Sberna
https://arxiv.org/abs/2506.21668 https://

Dynamical quasinormal mode excitation
We study the dynamical excitation of quasinormal modes (QNMs) through the plunge, merger and ringdown of an extreme-mass-ratio-inspiral into a Schwarzschild black hole, for generic orbital configurations. We work out the QNM causality condition, crucial to eliminate amplitude divergences and to incorporate horizon redshift effects. We then use it to derive a model of the time-dependent QNM excitation via a Green's function approach, driven by the point-particle source on a given trajectory. Our…

Changing disc compositions via internal photoevaporation II: M dwarf systems
Julia Lena Lienert, Bertram Bitsch, Thomas Henning
https://arxiv.org/abs/2505.21470

Changing disc compositions via internal photoevaporation II: M dwarf systems
The chemical evolution of the inner regions of protoplanetary discs is a complex process. Several factors influence it, one being the inward drift and evaporation of volatile-rich pebbles. During the disc's evolution, its inner part is first enriched with evaporating water-ice, resulting in a low C/O ratio. Afterwards, C-rich gas from the outer disc is transported inwards. Consequently, the C/O ratio of the inner disc increases again after 2 Myr. Previously, we studied how internal photoevapora…