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Earlier sources: Energy
Energy research and engineering concern how power is produced, stored, delivered, and consumed. Follow solar and nuclear power, fusion, geothermal systems, batteries, electricity grids, and changing power demand.
SYMTRI organizes observations from public sources into a living map. Connections reflect shared subject matter; they do not establish causation or endorse a source.
Open in the map ↗730 classified signals in the fourteen-day window. Recent momentum: steady. These counts include signals awaiting readable evidence.
Earlier sources
Up to ten sources with readable evidence, ordered by their feed timestamp. These archive sources can be older than the live fourteen-day window. This list is a sample, not a measure of total activity. Dates distinguish paper publication, repository creation, model/dataset activity, Hacker News posts, and KEV catalog additions. “First archived” records when SYMTRI first stored the signal.
- arXiv · Published · First archived
Energy-constrained two-way capacities of the pure-loss channel ↗
We determine the two-way quantum and secret-key capacities of the pure-loss channel under an average input photon-number constraint. For transmissivity $η$ and photon budget $N$, both capacities equal $g(N)-g((1-η)N)$, where $g$ is the entropy of a thermal state. This coincides with the rate achieved by the known reverse coherent information of a two-mode squeezed vacuum. Our result provides the last missing capacity formula for the celebrated pure-loss channel, completing the picture of bosonic quantum communication under pure loss.
- Hacker News · Posted on Hacker News · First archived
4-hour battery storage is cheaper to install than gas turbines all across globe ↗
Hacker News discussion.
- NASA · Source date · First archived
NASA, Energy Department Advance New Era of Nuclear-Powered Exploration ↗
NASA Administrator Jared Isaacman, seated left, and U.S. Secretary of Energy Chris Wright, seated right, hold the signed Memorandum of Understanding, “Accelerating American Leadership in Space Nuclear Power and Propulsion,” as Director of the White House Office of Science and Technology Policy (OSTP) Michael Kratsios, looks on, during the Science: A Golden Age Summit, Thursday, Oct. 8, 2026, at the Donald J. Trump Institute of Peace in Washington. NASA/Bill Ingalls Editor’s note: This release was updated Oct. 8, 2026 with the formal name of the summit. As the Golden Age of deep-space explorati…
- arXiv · Published · First archived
Compressional heating above 1 keV on the LM26 magnetized target fusion machine ↗
The LM26 device has achieved a peak electron temperature of $T_e = 1180 \pm 65$ eV as measured by filtered X-ray diodes, supported by adjacent Thomson scattering measurements of $T_e = 1090 \pm 40$ eV, with a deuterium ion temperature of $T_i = 459 \pm 33$ eV as inferred from neutron yield. LM26 compresses a spherical tokamak plasma inside an initially 1.76 m diameter solid lithium liner imploded by theta-pinch coils. Radial compression by a factor of 2.75 increases $T_e$ over fivefold, while $T_i$ increases as much as twofold. The integrated observation of magnetic flux compression, electron…
- arXiv · Published · First archived
Imaging ablator-fuel mix of hot spot in inertial confinement fusion via resonant X-ray absorption using an X-ray free electron laser ↗
A novel diagnostic is proposed for active probing of doped inertial confinement fusion (ICF) spherical shells, enabling direct measurements of mix and burn dynamics at next-generation implosion facilities via resonant absorption imaging with an X-ray free-electron laser (XFEL). The charge-state-sensitive imaging of embedded dopants provides spatiotemporally resolved constraints on ionization, opacity, and material mix seeded by hydrodynamic instabilities in stagnated plasmas. Proof-of-principle experiments demonstrating resonant XFEL probing of hot spot in coated copper wires driven by an ultr…
- arXiv · Published · First archived
Reaching high fusion gain with grams of spin-polarized fuel ↗
Building on recent ignition-access work of Delgado-Aparicio, Ono, and Menard, we show that even a single-use, gram-scale quantity of spin-polarized fuel (SPF) is useful for increasing fusion power and gain in magnetic confinement fusion machines such as tokamaks and stellarators. While fueling a fusion power plant continuously with SPF requires $\sim$kilograms per day, far beyond present capabilities, a single-use short pulse of SPF allows a fusion plasma to cross into a high-gain regime, and stay there, even after switching back to regular unpolarized fuel. With continuous polarized fueling,…
- arXiv · Published · First archived
Beam filamentation instability drives deuterium-tritium fusion with polarized neutron emission ↗
Filamentation instabilities are generally regarded as detrimental to fast-electron transport in fusion plasmas because they increase beam divergence and redistribute deposited energy. Here, we use two-dimensional particle-in-cell simulations coupled to a spin-dependent deuterium-tritium fusion module to investigate whether filamentation can instead transfer energy from counterstreaming electrons to prepolarized fusion ions. The simulations show that magnetic filaments, together with longitudinal inductive and transverse charge-separation electric fields, accelerate initially stationary deutero…
- OpenAlex · Published · First archived
On Porosity Analysis of Ti-6Al-4V Thin Struts Made by Laser Powder-Bed Fusion: Effects of Build Orientation, Strut Size and Linear Energy Density ↗
Porosity in laser powder bed fusion (L-PBF) lattice struts remains poorly understood, as the effects of build angle and process parameters are often studied separately. A full factorial design of 27 configurations combined three build angles (40–70°), three strut sizes (0.25–1.25 mm), and three linear energy densities (LED: 0.23–0.35 J/mm). Specimens were fabricated in Ti-6Al-4V on an EOS M270 system and characterized by micro-computed tomography (µ-CT). Statistical analysis showed that all three factors influenced porosity percentage (P%), with a significant size–LED interaction, while only s…
- OpenAlex · Published · First archived
Transmission Structure Design and Performance Analysis of a Cylindrical Tower-Type Gravity Energy Storage System ↗
Gravity energy storage (GES) is an important direction in the development of emerging energy storage technologies because of its potential for long-duration storage, large capacity, and high safety. To address limitations in transmission structure design and transmission efficiency in existing tower-type GES systems, this study proposes a tower-type GES system with a cylindrical frame structure. A permanent magnet synchronous motor directly drives a drum for vertical lifting. A rotary forklift mechanism coordinates circumferential alignment, radial feed, and local lifting and lowering to trans…
- OpenAlex · Published · First archived
Effect of Ironing Parameters on Surface Quality and Energy Demand of FDM ‐Fabricated Proximal Humerus Plates: A Box–Behnken and Machine Learning Study ↗
ABSTRACT This study investigates the effects of ironing parameters on surface quality and energy demand in FDM fabrication of proximal‐humerus‐inspired PLA plate‐like demonstrator, aiming to quantify how ironing settings influence surface roughness (Ra) and electrical energy consumption (EC), thereby revealing the quality–efficiency trade‐off in the finishing stage. Four ironing related process variables including ironing flow (IF), ironing line spacing (ILS), ironing speed (IS), and ironing inset (II) were investigated at three levels using a BBD. Experimental results showed that Ra varied be…
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How to assess evidence about Energy
Check each original source for its methods, release status, limitations, and supporting data. A repository announcement, a preprint, and a published study provide different kinds of evidence. SYMTRI’s subject classification helps discovery; it does not independently validate the source’s claims.
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