Lawrence Livermore National Laboratory

Low Reflectance all‐Glass Metasurface Lenses Based on Laser Self‐generated Nanoparticles

ABSTRACT Optical metasurfaces, comprised of subwavelength nanostructures, hold a great promise to high‐power laser optics but also a limited pertinence due to their currently limited aperture size, throughput and durability. Here, an alternative approach is presented, reliant on...

Thin-pulse experiments performed on triaminotrinitrobenzene (TATB)-based explosives at different temperatures and pressed densities

Experiments were performed on triaminotrinitrobenzene (TATB)-based explosives to measure the thin-pulse shock-initiation response at different temperatures (ambient, 75 °C, and −55 °C), densities (∼1.87–1.90 g/cm3), and at varying pulse durations. A thin stainless-steel flyer pla...

The parent bodies of Ryugu and Ivuna formed before those of other carbonaceous chondrites

Most carbonaceous chondrite (CC) meteorites contain abundant chondrules, millimeter-scale spherical inclusions of previously molten material. Ivuna-type carbonaceous chondrites (CIs) do not contain chondrules, nor do samples of the carbonaceous asteroid Ryugu. CIs and Ryugu share...

Experimental three-dimensional dendrite tip shape characterization by interferometry and phase-field comparison during columnar directional solidification

International audience

Hierarchical sparse Bayesian multitask learning for disease prediction in pooled microbiome studies

Abstract Background: Microbiome-based disease prediction across pooled studies is challenging because the data are high dimensional, heterogeneous, and often too limited to support reliable study-specific models. We propose a hierarchical sparse Bayesian multitask logistic regres...

Inverse design of bespoke interatomic potentials via active learning by information-matching

Interatomic potentials (IPs) enable large-scale atomistic simulations beyond the reach of first-principles methods, but their predictive reliability depends critically on the selection of training data, quantified uncertainty, and model expressiveness. Active learning (AL) provid...

FAIR-SHEPHERD: Fairness beyond Statistical Parity toward Structural Alignment

All fairness algorithms unavoidably rely on normative assumptions about fair treatment, yet these assumptions often remain implicit. We argue that these assumptions should be formalized as explicit, auditable policies and introduce FAIR-SHEPHERD , a structural policy-based framew...

The AWAKEN wind farm benchmark – Part 2: Modeling results

Abstract. Accurately modeling wind farm performance in complex atmospheric flows remains a challenge. This paper presents the modeling results of the American WAKE experimeNt (AWAKEN) wind farm benchmark, a collaborative effort involving 16 research groups from academia and indus...

Differentiable Forward Modeling for Efficient and Accurate Shear Inference

Forthcoming Stage-IV dark energy optical surveys, such as LSST, have the ambitious goal of measuring cosmological parameters at sub-percent precision. Realizing their full scientific potential requires very precise measurement of the cosmic shear signal and control of correspondi...

Near-Adjacent HeavyLanthanide Separation and SensingUsing Dimerizing Lanmodulins

Abstract Protein-based recovery, detection, and separation of rare earth elements (REs) have accelerated since the discovery of the lanmodulin (LanM) proteins. While exceptional at total RE recovery, prior proteins, like most ligands, exhibited limited ability to differentiate RE...

A Survey of Distributed Asynchronous Many-Task Models and Their Applications

Asynchronous many-task (AMT) runtime systems have become an important paradigm for expressing fine-grained parallelism and managing asynchrony in high-performance computing (HPC). Originating from early dataflow concepts, AMTs have evolved to enable dynamic task generation, expli...

Optical diagnostic design for measuring the radiation front with a mid-leg pumped divertor on DIII-D

The design of an optical diagnostic system to localize the radiation front in a mid-leg pumped divertor configuration on DIII-D is presented. Divertor detachment is a key mechanism for handling power exhaust in tokamaks, and mid-leg pumping offers a promising approach to radiativ...

Stellar Interpretation of Meteoritic Data and PLotting for Everyone (SIMPLE): Isotope Mixing Lines for Six Sets of Core-collapse Supernova Models

Abstract Bulk meteorites and their inclusions exhibit, for many chemical elements, isotopic variability produced by nucleosynthetic events in stars and supernovae before the formation of the Sun. While the exact astrophysical origins of these variations are still a matter of deba...