Tootfinder

Entanglement-inspired frequency-agile rangefinding
Weijie Nie, Peide Zhang, Alex McMillan, Alex S. Clark, John G. Rarity
https://arxiv.org/abs/2506.11980 h…

Entanglement-inspired frequency-agile rangefinding
Entanglement, a key feature of quantum mechanics, is recognized for its non-classical correlations which have been shown to provide significant noise resistance in single-photon rangefinding and communications. Drawing inspiration from the advantage given by energy-time entanglement, we developed an energy-time correlated source based on a classical laser that preserves the substantial noise reduction typical of quantum illumination while surpassing the quantum brightness limitation by over six…

Control Architecture and Design for a Multi-robotic Visual Servoing System in Automated Manufacturing Environment
Rongfei Li
https://arxiv.org/abs/2506.11387

Control Architecture and Design for a Multi-robotic Visual Servoing System in Automated Manufacturing Environment
The use of robotic technology has drastically increased in manufacturing in the 21st century. But by utilizing their sensory cues, humans still outperform machines, especially in micro scale manufacturing, which requires high-precision robot manipulators. These sensory cues naturally compensate for high levels of uncertainties that exist in the manufacturing environment. Uncertainties in performing manufacturing tasks may come from measurement noise, model inaccuracy, joint compliance (e.g., el…

Cyclic Data Streaming on GPUs for Short Range Stencils Applied to Molecular Dynamics
Martin Rose, Simon Homes, Lukas Ramsperger, Jose Gracia, Christoph Niethammer, Jadran Vrabec
https://arxiv.org/abs/2507.11289

Cyclic Data Streaming on GPUs for Short Range Stencils Applied to Molecular Dynamics
In the quest for highest performance in scientific computing, we present a novel framework that relies on high-bandwidth communication between GPUs in a compute cluster. The framework offers linear scaling of performance for explicit algorithms that is only limited by the size of the dataset and the number of GPUs. Slices of the dataset propagate in a ring of processes (GPUs) from one GPU, where they are processed, to the next, which results in a parallel-in-time parallelization. The user of th…

Quasi-Periodic Oscillations due to radiative feedback mechanism between the disc and corona
Akash Garg, Ranjeev Misra, Somasri Sen
https://arxiv.org/abs/2507.12111

Quasi-Periodic Oscillations due to radiative feedback mechanism between the disc and corona
Compact object systems exhibit Quasi-Periodic Oscillations (QPOs) as revealed by peaked features in their power density spectra. It has been known that stochastic variations in the accretion disc will propagate to the corona after a time delay and that the hard X-rays from the corona impinge back on the disc, giving reflection spectral features. Here, we show that the combination of these two effects makes a simple radiative feedback system between the corona and the disc, which naturally produ…

Local Clustering in Hypergraphs through Higher-Order Motifs
Giuseppe F. Italiano, Athanasios L. Konstantinidis, Anna Mpanti, Fariba Ranjbar
https://arxiv.org/abs/2507.10570

Local Clustering in Hypergraphs through Higher-Order Motifs
Hypergraphs provide a powerful framework for modeling complex systems and networks with higher-order interactions beyond simple pairwise relationships. However, graph-based clustering approaches, which focus primarily on pairwise relations, fail to represent higher-order interactions, often resulting in low-quality clustering outcomes. In this work, we introduce a novel approach for local clustering in hypergraphs based on higher-order motifs, small connected subgraphs in which nodes may be lin…

Wind-driven Ranch fire in Apple Valley sparks evacuation order
A wind-whipped brush fire near Apple Valley had grown to 4,205 acres by about 9:30 p.m. Tuesday with no containment, according to Cal Fire #SanBernardino.
The #Ranchfire ignited south of Apple Valley around 2 p.m., according to fire offi…

Wind-driven Ranch fire in Apple Valley sparks evacuation order
The fire started in Apple Valley around 2 p.m., according to the San Bernardino Unit of Cal Fire.

Sum Rate Maximization for Pinching Antennas Assisted RSMA System With Multiple Waveguides
Peiyu Wang, Hong Wang, Rongfang Song
https://arxiv.org/abs/2506.10596

Sum Rate Maximization for Pinching Antennas Assisted RSMA System With Multiple Waveguides
In this letter, a pinching antennas (PAs) assisted rate splitting multiple access (RSMA) system with multiple waveguides is investigated to maximize sum rate. A two-step algorithm is proposed to determine PA activation scheme and optimize the waveguide beamforming. Specifically, a low complexity spatial correlation and distance based method is proposed for PA activation selection. After determining the PA activation status, a semi-definite programming (SDP) based successive convex approximation…

Energy Aware Camera Location Search Algorithm for Increasing Precision of Observation in Automated Manufacturing
Rongfei Li, Francis Assadian
https://arxiv.org/abs/2506.10251

Energy Aware Camera Location Search Algorithm for Increasing Precision of Observation in Automated Manufacturing
Visual servoing technology has been well developed and applied in many automated manufacturing tasks, especially in tools' pose alignment. To access a full global view of tools, most applications adopt eye-to-hand configuration or eye-to-hand/eye-in-hand cooperation configuration in an automated manufacturing environment. Most research papers mainly put efforts into developing control and observation architectures in various scenarios, but few of them have discussed the importance of the camera…

Innovative Adaptive Imaged Based Visual Servoing Control of 6 DoFs Industrial Robot Manipulators
Rongfei Li, Francis Assadian
https://arxiv.org/abs/2506.10240

Innovative Adaptive Imaged Based Visual Servoing Control of 6 DoFs Industrial Robot Manipulators
Image-based visual servoing (IBVS) methods have been well developed and used in many applications, especially in pose (position and orientation) alignment. However, most research papers focused on developing control solutions when 3D point features can be detected inside the field of view. This work proposes an innovative feedforward-feedback adaptive control algorithm structure with the Youla Parameterization method. A designed feature estimation loop ensures stable and fast motion control whe…

A Novel Feedforward Youla Parameterization Method for Avoiding Local Minima in Stereo Image Based Visual Servoing Control
Rongfei Li, Francis Assadian
https://arxiv.org/abs/2506.10252

A Novel Feedforward Youla Parameterization Method for Avoiding Local Minima in Stereo Image Based Visual Servoing Control
In robot navigation and manipulation, accurately determining the camera's pose relative to the environment is crucial for effective task execution. In this paper, we systematically prove that this problem corresponds to the Perspective-3-Point (P3P) formulation, where exactly three known 3D points and their corresponding 2D image projections are used to estimate the pose of a stereo camera. In image-based visual servoing (IBVS) control, the system becomes overdetermined, as the 6 degrees of fre…