All Disciplines – Page 5 – Kavli Institute Pre-Print Publications

TRIPP: A General Purpose Data Pipeline for Astronomical Image Processing

Posted by dbos January 30, 2025February 5, 2025MIT, This Week: Astrophysics

Kavli Affiliate: Michael McDonald | First 5 Authors: Alex Thomas, Natalie LeBaron, Luca Angeleri, Samuel Whitebook, Rachel Darlinger | Summary: We present the TRansient Image Processing Pipeline (TRIPP), a transient and variable source detection pipeline that employs both difference imaging and light curve analysis techniques for astronomical data. Additionally, we demonstrate TRIPP’s rapid analysis capability […]

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Better early than never: A new test for superluminal gravitational wave polarizations

Posted by dbos January 30, 2025February 5, 2025Chicago, This Week: Astrophysics

Kavli Affiliate: Daniel E. Holz | First 5 Authors: Kristen Schumacher, Colm Talbot, Daniel E. Holz, Nicolás Yunes, | Summary: In some beyond-Einstein theories of gravity, gravitational waves can contain up to six polarizations, which are allowed to propagate at different speeds faster than light. These different propagation speeds imply that polarizations generated by the […]

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Five-dimensional single-shot fluorescence imaging using a polarized Fourier light-field microscope

Posted by dbos January 29, 2025February 5, 2025Caltech, This Week: Nanoscience

Kavli Affiliate: Changhuei Yang | First 5 Authors: Oumeng Zhang, Changhuei Yang, , , | Summary: Single-shot fluorescence imaging techniques have gained increasing interest in recent years due to their ability to rapidly capture complex biological data without the need for extensive scanning. In this letter, we introduce polarized Fourier light field microscopy (pFLFM), a […]

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CIBER 4th flight fluctuation analysis: Measurements of near-IR auto- and cross-power spectra on arcminute to sub-degree scales

Posted by dbos January 29, 2025February 5, 2025Caltech, This Week: Nanoscience

Kavli Affiliate: James J. Bock | First 5 Authors: Richard M. Feder, James J. Bock, Yun-Ting Cheng, Asantha Cooray, Phillip M. Korngut | Summary: We present new anisotropy measurements in the near-infrared (NIR) for angular multipoles $300<ell<10^5$ using imaging data at 1.1 $mu$m and 1.8 $mu$m from the fourth flight of the Cosmic Infrared Background […]

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CIBER 4th flight fluctuation analysis: Pseudo-power spectrum formalism, improved source masking and validation on mocks

Posted by dbos January 29, 2025February 5, 2025Caltech, This Week: Nanoscience

Kavli Affiliate: James J. Bock | First 5 Authors: Richard M. Feder, James J. Bock, Yun-Ting Cheng, Asantha Cooray, Phillip M. Korngut | Summary: Precise, unbiased measurements of extragalactic background anisotropies require careful treatment of systematic effects in fluctuation-based, broad-band intensity mapping measurements. In this paper we detail improvements in methodology for the Cosmic Infrared […]

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Phage defense and genome editing using novel retrons sourced from isolated environmental bacteria

Posted by dbos January 29, 2025February 5, 2025This Week: Neuroscience, UCSF

Kavli Affiliate: Seth Shipman | Authors: Kazuo Nakamura, Karen Zhang, Mario R Mestre, Matias Rojas-Montero and Seth Shipman | Summary: Retrons are bacterial immune systems that protect a bacterial population against phages by killing infected hosts. Retrons typically comprise a reverse transcriptase, a template noncoding RNA that is partially reverse transcribed into RT-DNA, and a […]

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Quantum oscillations in a dipolar excitonic insulator

Posted by dbos January 29, 2025February 5, 2025Cornell, This Week: Nanoscience

Kavli Affiliate: Jie Shan | First 5 Authors: Phuong X. Nguyen, Raghav Chaturvedi, Bo Zou, Kenji Watanabe, Takashi Taniguchi | Summary: Quantum oscillations in magnetization or resistivity are a defining feature of metals subject to an external magnetic field. The phenomenon is generally not expected in insulators without a Fermi surface. The observations of quantum […]

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Segmentation-Aware Generative Reinforcement Network (GRN) for Tissue Layer Segmentation in 3-D Ultrasound Images for Chronic Low-back Pain (cLBP) Assessment

Posted by dbos January 29, 2025February 5, 2025Peking, This Week: Astrophysics

Kavli Affiliate: Jing Wang | First 5 Authors: Zixue Zeng, Xiaoyan Zhao, Matthew Cartier, Tong Yu, Jing Wang | Summary: We introduce a novel segmentation-aware joint training framework called generative reinforcement network (GRN) that integrates segmentation loss feedback to optimize both image generation and segmentation performance in a single stage. An image enhancement technique called […]

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Byzantine-Robust Federated Learning over Ring-All-Reduce Distributed Computing

Posted by dbos January 29, 2025February 5, 2025This Week: Astrophysics, Tokyo

Kavli Affiliate: Jia Liu | First 5 Authors: Minghong Fang, Zhuqing Liu, Xuecen Zhao, Jia Liu, | Summary: Federated learning (FL) has gained attention as a distributed learning paradigm for its data privacy benefits and accelerated convergence through parallel computation. Traditional FL relies on a server-client (SC) architecture, where a central server coordinates multiple clients […]

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The impact of cosmic ray feedback during the epoch of reionisation

Posted by dbos January 28, 2025February 5, 2025Cambridge, This Week: Astrophysics

Kavli Affiliate: Martin Haehnelt | First 5 Authors: Marion Farcy, Joakim Rosdahl, Yohan Dubois, Jérémy Blaizot, Sergio Martin-Alvarez | Summary: Galaxies form and evolve via a multitude of complex physics. In this work, we investigate the role of cosmic ray (CR) feedback in galaxy evolution and reionisation, by examining its impact on the escape of […]

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