Long-Distance Signal Propagation in AC-LGAD

We investigate the signal propagation in AC-LGAD (aka RSD), which are LGAD with a common N+ layer and segmented AC-coupled readout contacts, by measuring response to IR laser TCT on a large selection of AC-LGAD with strip readout. The interest for this topic derives from the realization that while large charge sharing between neighboring strips is essential for good position resolution, large sharing beyond the next neighbor generates background signals which in general are detrimental to the sensor goal of low occupancy. Using AC-LGAD with strip readout produced by Hamamatsu Photonics (HPK), we evaluate the effects of a variety of sensor properties, including geometrical parameters (strip length, width), process parameters like the N+ layer resistivity, the coupling capacitance, and the thickness of the bulk on the signal sharing and the position resolution.Comment: 9 pages, 7 figures, 13th Hiroshima Symposium HSTD1

Measurement of collinear W-boson production with high transverse momentum jets at s\sqrt{s}=~13~TeV using the ATLAS detector

This thesis presents a measurement of collinear ?-boson radiation from high-momentum jets using the full Run-2 dataset collected by the ATLAS collaboration at √? = 13 TeV, with an integrated luminosity of 140 fb−1 . The W+ jets signal, identified through leptonic decays in the electron or muon channels, focuses on events with small angular separation between the jet and lepton, often involving numerous QCD emissions. Accurate modeling of this phase-space requires sophisticated multi-jet merged setups. Over 86,000 ?-boson candidates were measured across various differential distributions with a precision of10-20%, and the data was compared against newly developed state-of-the-art generator predictions using Sherpa 2.2.11 and MadGraph5_aMC@NLO with FxFx multi-jet merged setups, which are accurate to next-to-leading order in the strong and weak coupling constants

sjiggins/carl-torch: Version 2.2.1

<p><strong>Version 2.2.1, represents the exact code base as release Version 2.2 with one minor change. See patch notes below.</strong></p> <h2>Current Notes:</h2> <p><strong>Full Changelog</strong>: https://github.com/sjiggins/carl-torch/compare/v2.2...v2.2.1</p> <h2>Previous Notes</h2> <p>Version 2.2 represents a substantial update in the data pre-processing capability of the code. Key features included are:</p> <ul> <li><strong>Sub-sampling:</strong> Select events based on the weight of each event and assign unit values. This converts all sampling rates from weighted representation to abundance representation</li> <li><strong>Input Domain Feature Clipping:</strong> Clip input domain features to quantile definitions from the user - see argument handler for details.</li> </ul> <h2>What's Changed</h2> <ul> <li>Dynamic CPU/GPU loading of array in output score regulated categorical cross-entropy loss function by @sjiggins in https://github.com/sjiggins/carl-torch/pull/32</li> <li>Bug Fix: Adding --scale-method default for evaluation steering by @sjiggins in https://github.com/sjiggins/carl-torch/pull/35</li> <li>README file for VHbb W+jets by @vozdeckyl in https://github.com/sjiggins/carl-torch/pull/37</li> <li>Subsampling for data preprocessing by @sjiggins in https://github.com/sjiggins/carl-torch/pull/30</li> <li>Feature: Input Feature Quantile Clipping by @sjiggins in https://github.com/sjiggins/carl-torch/pull/40</li> </ul> <h2><strong>Full Changelog</strong>: https://github.com/sjiggins/carl-torch/compare/v2.1...v2.2</h2&gt

Design and Characterization of Deformable Superstructures Based on Amine‐Acrylate Liquid Crystal Elastomers

Abstract Deformable superstructures are man‐made materials with large deformation properties that surpass those of natural materials. However, traditional deformable superstructures generally use conventional materials as substrates, limiting their applications in multi‐mode reconfigurable robots and space‐expandable morphing structures. In this work, amine‐acrylate‐based liquid crystal elastomers (LCEs) are used as deformable superstructures substrate to provide high driving stress and strain. By changing the molar ratio of amine to acrylate, the thermal and mechanical properties of the LCEs are modified. The LCE with a ratio of 0.9 exhibited improved polymerization degree, elongation at break, and toughness. Besides an anisotropic finite deformation model based on hyperelastic theory is developed for the LCEs to capture the configuration variation under temperature activation. Built upon these findings, an LCE‐based paper‐cutting structure with negative Poisson's ratio and a 2D lattice superstructure model are combined, processed, and molded by laser cutting. The developed superstructure is pre‐programmed to the configuration required for service conditions, and the deformation processes are analyzed using both experimental and finite element methods. This study is expected to advance the application of deformable superstructures and LCEs in the fields of defense and military, aerospace, and bionic robotics

Genomic analyses reveal a lack of widespread strong selection in indigenous chickens

The study of domestication has been revolutionized with the advent of molecular genetics. Chickens, with their clear domestication history, emerge as an excellent model for study into the paths of evolution in domestication and improvement. Here we used genomic data from wild, indigenous, and commercial chickens to better understand how genetic drift and selection translate into their differentiations. Our investigation into the patterns of allelic change and divergence reveals a polygenic architecture governing genetic differentiation during domestication and improvement. We uncover distinctive population-specific differentiations in terms of genes and functions among wild, indigenous, and commercial chickens. Using Runs Of Homozygosity (ROH) based mixed model approach developed in this study, we identified only directional selection signatures occurring in wild and commercial chickens. Notably, our findings suggest that indigenous chickens serve as reservoirs of genetic diversity, necessary for rapid adaptation to new environments or subsequent modern breeding. This work provides unprecedented insights into the chicken domestication and improvement, and it illuminates our understanding of the domestication of other animal species

Whole-genome analysis reveals the hybrid formation of Chinese indigenous DHB pig following human migration

Hybridization is widespread in nature and is a valuable tool in domestic breeding. The DHB (DaHuaBai) pig in South China is the product of such a breeding strategy, resulting in increased body weight compared with other pigs in the surrounding area. We analyzed genomic data from 20 Chinese pig breeds and investigated the genomic architecture after breed formation of DHB. The breed showed inconsistency in genotype and body weight phenotype, in line with selection after hybridization. By quantifying introgression with a haplotype-based approach, we proposed a two-step introgression from large-sized pigs into small-sized pigs to produce DHB, consistent with the human migration events in Chinese history. Combining with gene prioritization and allele frequency analysis, we identify candidate genes that showed selection after introgression and that may affect body weight, such as IGF1R, SRC, and PCM1. Our research provides an example of a hybrid formation of domestic breeds along with human migration patterns