Tootfinder

Solar limb faculae: intensity contrast from two vantage points
K. Albert, J. Hirzberger, N. A. Krivova, X. Li, D. Calchetti, G. Valori, J. Sinjan, S. K. Solanki, A. Gandorfer, J. Woch, D. Orozco Su\'arez, S. Parenti
https://arxiv.org/abs/2510.00320

Solar limb faculae: intensity contrast from two vantage points
Small-scale magnetic flux concentrations contribute significantly to the brightness variations of the Sun, yet observing them - particularly their magnetic field - near the solar limb remains challenging. Solar Orbiter offers an unprecedented second vantage point for observing the Sun. When combined with observations from the perspective of Earth, this enables simultaneous dual-viewpoint measurements of these magnetic structures, thereby helping to mitigate observational limitations. Using such…

Uncertainty-Aware Ankle Exoskeleton Control
Fatima Mumtaza Tourk, Bishoy Galoaa, Sanat Shajan, Aaron J. Young, Michael Everett, Max K. Shepherd
https://arxiv.org/abs/2508.21221 …

Uncertainty-Aware Ankle Exoskeleton Control
Lower limb exoskeletons show promise to assist human movement, but their utility is limited by controllers designed for discrete, predefined actions in controlled environments, restricting their real-world applicability. We present an uncertainty-aware control framework that enables ankle exoskeletons to operate safely across diverse scenarios by automatically disengaging when encountering unfamiliar movements. Our approach uses an uncertainty estimator to classify movements as similar (in-dist…

Response of Ionospheric Total Electron Content to the Impulsive and Late Phases of X-Class Solar Flares with Various Center-to-Limb Locations
S. Z. Bekker, R. O. Milligan, I. A. Ryakhovsky
https://arxiv.org/abs/2508.21668

Response of Ionospheric Total Electron Content to the Impulsive and Late Phases of X-Class Solar Flares with Various Center-to-Limb Locations
During a solar flare, the fluxes in various lines and continua of the solar spectrum increase, leading to enhanced ionization of the illuminated part of the Earth's ionosphere and an increase in the total electron content (TEC). It has been previously shown that nearly 50% of X-class solar flares exhibit a second peak in warm coronal lines, such as FeXV and FeXVI (called the 'EUV late phase'), the effect of which on the ionosphere remains largely unexplored. This study presents an analysis of t…

Limb Asymmetries on WASP-39b: A Multi-GCM Comparison of Chemistry, Clouds, and Hazes
Maria E. Steinrueck, Arjun B. Savel, Duncan A. Christie, Ludmila Carone, Shang-Min Tsai, Can Ak{\i}n, Thomas D. Kennedy, Sven Kiefer, David A. Lewis, Emily Rauscher, Dominic Samra, Maria Zamyatina, Kenneth Arnold, Robin Baeyens, Leonardos Gkouvelis, David Haegele, Christiane Helling, Nathan J. Mayne, Diana Powell, Michael T. Roman, Hayley Beltz, N\'estor Espinoza, Kevin Heng, Nicolas Iro, Eliza M. …

Limb Asymmetries on WASP-39b: A Multi-GCM Comparison of Chemistry, Clouds, and Hazes
With JWST, observing separate spectra of the morning and evening limbs of hot Jupiters has finally become a reality. The first such observation was reported for WASP-39b, where the evening terminator was observed to have a larger transit radius by about 400 ppm and a stronger 4.3 $μ$m CO$_2$ feature than the morning terminator. Multiple factors, including temperature differences, photo/thermochemistry, clouds and hazes, could cause such limb asymmetries. To interpret these new limb asymmetry o…

Multi-stage robust nonlinear model predictive control of a lower-limb exoskeleton robot
Alireza Aliyari, Gholamreza Vossoughi
https://arxiv.org/abs/2509.22120 https://

Multi-stage robust nonlinear model predictive control of a lower-limb exoskeleton robot
The use of exoskeleton robots is increasing due to the rising number of musculoskeletal injuries. However, their effectiveness depends heavily on the design of control systems. Designing robust controllers is challenging because of uncertainties in human-robot systems. Among various control strategies, Model Predictive Control (MPC) is a powerful approach due to its ability to handle constraints and optimize performance. Previous studies have used linearization-based methods to implement robust…

Subparsec Jet Morphologies of M87 at 43 GHz: Effects of Asymmetric Plasmoids within the Jet
Guan-Hong Li, Hung-Yi Pu
https://arxiv.org/abs/2508.17023 https://

Subparsec Jet Morphologies of M87 at 43 GHz: Effects of Asymmetric Plasmoids within the Jet
Radio observations of the M87 jet reveal limb-brightened features that exhibit temporal variations, with the brighter limb side not remaining consistently fixed at the subparsec scales. Utilizing a force-free jet model that considers exclusively the relativistic plasma dynamics along large-scale magnetic fields attached onto the central black hole, we examine the effects of asymmetric plasmoid injections within the subparsec jet. At subparsec scales, the jet velocity is predominantly influenced…

Just spent the last two days on a Remote Area First Aid course, run by JP of the Overland Guide Association. Really enjoyed it and definitely learned lots.
DRC ABCDE
#Motorcycles #Travel

Characterizing Human Limb Movements Using An In-House Multi-Channel Non-Invasive Surface-EMG System
Vinay C K, Vikas Vazhayil, Madhav rao
https://arxiv.org/abs/2509.13840 https:…

Characterizing Human Limb Movements Using An In-House Multi-Channel Non-Invasive Surface-EMG System
Electromyography (EMG) signals are obtained from muscle cell activity. The recording and analysis of EMG signals has several applications. The EMG is of diagnostic importance for treating patients suffering from neurological and neuromuscular disorders. Conventional methods involve placement of invasive electrodes within the muscles to record EMG signals. The goal is to showcase the usage of surface based EMG signals to characterize all possible human limb movements. An in-house non-invasive EM…

AJAHR: Amputated Joint Aware 3D Human Mesh Recovery
Hyunjin Cho, Giyun Choi, Jongwon Choi
https://arxiv.org/abs/2509.19939 https://arxiv.org/pdf/2509.19939…

AJAHR: Amputated Joint Aware 3D Human Mesh Recovery
Existing human mesh recovery methods assume a standard human body structure, overlooking diverse anatomical conditions such as limb loss. This assumption introduces bias when applied to individuals with amputations - a limitation further exacerbated by the scarcity of suitable datasets. To address this gap, we propose Amputated Joint Aware 3D Human Mesh Recovery (AJAHR), which is an adaptive pose estimation framework that improves mesh reconstruction for individuals with limb loss. Our model in…

New Scientist: Bad news? Our brain doesn't actually reorganise itself after an amputation https://www.newscientist.com/article/2493367-our-brain-doesnt-actually-reorganise-itself-after-an-amputation/

Our brain doesn't actually reorganise itself after an amputation
Previous research in macaques suggests that part of the brain reorganises itself when a limb is removed, but now a study in people has turned that idea on its head

Saw this guy a few days ago. Just a few houses up 🦉
Then last night I hear this screech again from our upstairs bedroom window. So I use the Merlin app to identify it as a Great Horned Owl. Then I played the various sounds and learned that this is a juvenile doing a "begging call", which is a raspy screeching sound young owls use to solicit food from their parents.
Kids, man. They always need something.

Telescope Tilt System for the POEMMA Balloon Radio Mission
Lawrence Wiencke (for the JEM-EUSO Collaboration), James Brague (for the JEM-EUSO Collaboration), Ash Fox-Smith (for the JEM-EUSO Collaboration), Auston Froid (for the JEM-EUSO Collaboration), Levi Bar-On (for the JEM-EUSO Collaboration), Stephen Meyer (for the JEM-EUSO Collaboration), Josh Moses (for the JEM-EUSO Collaboration), Ben Stillwell (for the JEM-EUSO Collaboration)

Telescope Tilt System for the POEMMA Balloon Radio Mission
The Probe of Extreme Multi-Messenger Astrophysics Balloon with Radio mission (PBR) will point above Earth's limb to measure PeV energy cosmic rays, and record star images to monitor optical focusing in situ. PBR will point below Earth's limb to search for earth-skimming neutrinos. PBR will also measure EeV energy cosmic rays by tilting as far down as the nadir direction. All of these searches will require changing and measuring the tilt angle of a single large integrated telescope and radio ant…

Towards Electrophysiological and Histological Mapping of Upper Limb Nerves in Pigs Using Epineural Stimulation
Jonathan Baum (CAMIN), Chamot-Nonin Manon (CAMIN), Oppelt Vera (CAMIN), David Guiraud (CAMIN), Christine Azevedo Coste (CAMIN), Thomas Guiho (CAMIN)
https://arxiv.org/abs/2510.02979

Towards Electrophysiological and Histological Mapping of Upper Limb Nerves in Pigs Using Epineural Stimulation
Understanding the relationship between nerve anatomy and the functional outcomes of electrical stimulation is critical for optimizing neural interface design. In this study, we conducted acute experiments on four pigs in which epineural cuff electrodes with multiple contacts were placed around upper limb nerves. A subset of electrical stimulation configurations -- previously identified via computational study -- was applied, and the resulting evoked electromyographic (EMG) responses were record…

Musculoskeletal simulation of limb movement biomechanics in Drosophila melanogaster
Pembe Gizem \"Ozdil, Chuanfang Ning, Jasper S. Phelps, Sibo Wang-Chen, Guy Elisha, Alexander Blanke, Auke Ijspeert, Pavan Ramdya
https://arxiv.org/abs/2509.06426

Musculoskeletal simulation of limb movement biomechanics in Drosophila melanogaster
Computational models are critical to advance our understanding of how neural, biomechanical, and physical systems interact to orchestrate animal behaviors. Despite the availability of near-complete reconstructions of the Drosophila melanogaster central nervous system, musculature, and exoskeleton, anatomically and physically grounded models of fly leg muscles are still missing. These models provide an indispensable bridge between motor neuron activity and joint movements. Here, we introduce the…

Multi-Instrument Observations and Tracking of a Coronal Mass Ejection Front From Low to Middle Corona
Oleg Stepanyuk, Kamen Kozarev
https://arxiv.org/abs/2508.18867 https://

Multi-Instrument Observations and Tracking of a Coronal Mass Ejection Front From Low to Middle Corona
The shape and dynamics of coronal mass ejections (CMEs) vary significantly based on the instrument and wavelength used. This has led to significant debate about the proper definitions of CME/shock fronts, pile-up/compression regions, and cores observations in projection in optically thin vs. optically thick emission. Here we present an observational analysis of the evolving shape and kinematics of a large-scale CME that occurred on May 7, 2021 on the eastern limb of the Sun as seen from 1 au. T…

A Semantic-Aware Framework for Safe and Intent-Integrative Assistance in Upper-Limb Exoskeletons
Yu Chen, Shu Miao, Chunyu Wu, Jingsong Mu, Bo OuYang, Xiang Li
https://arxiv.org/abs/2508.10378

A Semantic-Aware Framework for Safe and Intent-Integrative Assistance in Upper-Limb Exoskeletons
Upper-limb exoskeletons are primarily designed to provide assistive support by accurately interpreting and responding to human intentions. In home-care scenarios, exoskeletons are expected to adapt their assistive configurations based on the semantic information of the task, adjusting appropriately in accordance with the nature of the object being manipulated. However, existing solutions often lack the ability to understand task semantics or collaboratively plan actions with the user, limiting …

I have worked for 2 different Global 50 enterprises that did their own in-house development, one of which is largely to blame for the "Agile" model. Neither could stand up a new app in 4 months, much less 4 days. That was not because they coded slowly.
Enterprise grade software has had weeks of iterative development, technical validation, and user acceptance testing. It is built to be maintainable and enhanceable. It is fit for its environment.

Lost broadband, 4g access is spotty, lots of trees down on the roads, and it's a matter of time before the electricity goes too, but our house had a near miss!
#beingthankful

Magnetic Dip Found in a Quiescent Prominence Foot via Observation and Simulation
Huadong Chen, Chun Xia, Suli Ma, Yingna Su, Guiping Zhou, Eric Priest, Lyndsay Fletcher, Yuandeng Shen, Weining Tu, Wei Wang, Jun Zhang
https://arxiv.org/abs/2509.19723

Magnetic Dip Found in a Quiescent Prominence Foot via Observation and Simulation
Solar prominences (or filaments) are cooler and denser plasma suspended in the much hotter and rarefied solar corona. When viewed on the solar disc filament barbs or feet protrude laterally from filament spine. When observed at the limb of the Sun, they reach into the chromosphere or even further down. For a long time, the magnetic field orientation of barbs has remained a mystery due to the paradox that the barbs possess vertical fine structures and flows but are likely to be supported in a ho…

People often forget that even with an implant for restoring bodily functions (such as vision or limb movement), rehab typically involves months and years of follow-up training for half-decent results, without cost/benefit guarantees beforehand https://www.youtube.com/watch?v=nVugtxWmW4E Neuralink B…

Coordinated Motion Planning of a Wearable Multi-Limb System for Enhanced Human-Robot Interaction
Chaerim Moon, Joohyung Kim
https://arxiv.org/abs/2509.10444 https://

Coordinated Motion Planning of a Wearable Multi-Limb System for Enhanced Human-Robot Interaction
Supernumerary Robotic Limbs (SRLs) can enhance human capability within close proximity. However, as a wearable device, the generated moment from its operation acts on the human body as an external torque. When the moments increase, more muscle units are activated for balancing, and it can result in reduced muscular null space. Therefore, this paper suggests a concept of a motion planning layer that reduces the generated moment for enhanced Human-Robot Interaction. It modifies given trajectories…

Multiple Scattering Effects in Noctilucent Clouds: Numerical Estimation and Application to Altitude and Particle Size Measurements
Oleg S. Ugolnikov
https://arxiv.org/abs/2509.04120

Multiple Scattering Effects in Noctilucent Clouds: Numerical Estimation and Application to Altitude and Particle Size Measurements
The simple 3-D radiative transfer model in the atmosphere of the Earth is built for numerical comparison of direct solar radiation and limb scattering background at the definite layer during the deep twilight period at the middle and upper atmosphere. This allows finding the contribution of multiple scattering in the field of high-altitude clouds such as polar stratospheric and noctilucent clouds. This is the factor that can influence the results of altitude and microphysical study of the parti…

Towards Online Robot Interaction Adaptation to Human Upper-limb Mobility Impairments in Return-to-Work Scenarios
Marta Lagomarsino, Francesco Tassi
https://arxiv.org/abs/2510.05425

Towards Online Robot Interaction Adaptation to Human Upper-limb Mobility Impairments in Return-to-Work Scenarios
Work environments are often inadequate and lack inclusivity for individuals with upper-body disabilities. This paper presents a novel online framework for adaptive human-robot interaction (HRI) that accommodates users' arm mobility impairments, ultimately aiming to promote active work participation. Unlike traditional human-robot collaboration approaches that assume able-bodied users, our method integrates a mobility model for specific joint limitations into a hierarchical optimal controller. T…

Replaced article(s) found for q-bio.TO. https://arxiv.org/list/q-bio.TO/new
[1/1]:
- What the %PCSA? Addressing Diversity in Lower-Limb Musculoskeletal Models: Age- and Sex-related D...
R. Maarleveld, H. E. J. Veeger, F. C. T. van der Helm, J. Son, R. L. Lieber, E. van der Kruk

High-Resolution Observation of Solar Prominence Plumes Induced by Enhanced Spicular Activity
Wensi Wang, Rui Liu, Runbin Luo, Xiaoli Yan
https://arxiv.org/abs/2508.13456 https:/…

High-Resolution Observation of Solar Prominence Plumes Induced by Enhanced Spicular Activity
Solar prominences are the most prominent large-scale structures observed above the solar limb in emission in chromospheric lines but in absorption in coronal lines. At the bottom of prominences often appears a bubble, with plumes occasionally rising from the prominence-bubble interface. The plumes may potentially play an important role in the mass supply and thermodynamic evolution of prominences, but their nature and generation mechanism are elusive. Here we use the high-resolution H-alpha obs…

Replaced article(s) found for physics.med-ph. https://arxiv.org/list/physics.med-ph/new
[1/1]:
- A Kinematic and Kinetic Dataset of Lower Limb Joints During Obstacle Crossing in Healthy Young Ad...
Jingwen Huang, Shucong Yin, Zhaokai Chen, Hanyang Xu, Chenglong Fu

CAD-Driven Co-Design for Flight-Ready Jet-Powered Humanoids
Punith Reddy Vanteddu, Davide Gorbani, Giuseppe L'Erario, Hosameldin Awadalla Omer Mohamed, Fabio Bergonti, Daniele Pucci
https://arxiv.org/abs/2509.14935

CAD-Driven Co-Design for Flight-Ready Jet-Powered Humanoids
This paper presents a CAD-driven co-design framework for optimizing jet-powered aerial humanoid robots to execute dynamically constrained trajectories. Starting from the iRonCub-Mk3 model, a Design of Experiments (DoE) approach is used to generate 5,000 geometrically varied and mechanically feasible designs by modifying limb dimensions, jet interface geometry (e.g., angle and offset), and overall mass distribution. Each model is constructed through CAD assemblies to ensure structural validity a…

microJAX: A Differentiable Framework for Microlensing Modeling with GPU-Accelerated Image-Centered Ray Shooting
Shota Miyazaki (Institute of Space,Astronautical Science, Japan Aerospace Exploration Agency, Japan), Hajime Kawahara (Institute of Space,Astronautical Science, Japan Aerospace Exploration Agency, Japan)
https://arxiv.org/abs/251…

microJAX: A Differentiable Framework for Microlensing Modeling with GPU-Accelerated Image-Centered Ray Shooting
We introduce microJAX, the first fully differentiable implementation of the image-centered ray-shooting (ICRS) algorithm for gravitational microlensing. Built on JAX and its XLA just-in-time compiler, microJAX exploits GPU parallelism while providing exact gradients through automatic differentiation. The current release supports binary- and triple-lens geometries, including limb-darkened extended-source effects, and delivers magnifications that remain differentiable for all model parameters. Be…

Force-Modulated Visual Policy for Robot-Assisted Dressing with Arm Motions
Alexis Yihong Hao, Yufei Wang, Navin Sriram Ravie, Bharath Hegde, David Held, Zackory Erickson
https://arxiv.org/abs/2509.12741

Force-Modulated Visual Policy for Robot-Assisted Dressing with Arm Motions
Robot-assisted dressing has the potential to significantly improve the lives of individuals with mobility impairments. To ensure an effective and comfortable dressing experience, the robot must be able to handle challenging deformable garments, apply appropriate forces, and adapt to limb movements throughout the dressing process. Prior work often makes simplifying assumptions -- such as static human limbs during dressing -- which limits real-world applicability. In this work, we develop a robot…

Stellar occultations in support of the LUMIO orbit determination
Davide Banzi, Riccardo Lasagni Manghi, Marco Zannoni
https://arxiv.org/abs/2509.04177 https://

Stellar occultations in support of the LUMIO orbit determination
This work investigates the use of stellar occultation measurements to enhance the orbit determination performance of the Lunar Meteoroid Impact Observer (LUMIO) mission, operating from a quasi-Halo orbit around the Earth-Moon L2 point. During science phases, when radiometric tracking is sparse and low illumination limits conventional optical navigation methods, occultation events, defined as precise timings of stellar appearances/disappearances behind the Moon's limb, offer a suitable alternati…

Probing chromospheric fine structures with an H{\alpha} proxy using MURaM-ChE
Sanghita Chandra, Robert Cameron, Damien Przybylski, K. Sami Solanki, Patrick Ondratschek, Sanja Danilovic
https://arxiv.org/abs/2508.04387

Probing chromospheric fine structures with an Hα proxy using MURaM-ChE
H$α$ observations of the solar chromosphere reveal dynamic small-scale structures known as spicules at the limb and rapid blue and red shifted excursions (RBEs/RREs) on-disk. We want to understand what drives these dynamic features, their magnetohydrodynamic (MHD) properties and their role in energy and heat transport to the upper solar atmosphere. To do this, we aim to develop a proxy for synthetic H$α$ observations in radiative-MHD simulations to help identify these features. We use the chr…