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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Our core mission is to ensure the U.S. nuclear deterrent. Our stockpile is as unique in manufacturing as the engine of this sports car. Los Alamos’s mission is ensure the safety, reliability, and performance of stockpile. Los Alamos uses a combination of fundamental science, sub-critical testing, and high performance computing and modeling to accomplish this mission
For validation of simplified cylindrical casting simulations this report covers basic data about the setup and casting of 3 similar 4x12 right cylinders.
The purpose of this briefing is to provide Planning Team members and other SMEs with key/high-level information on the Laboratory’s Annual Full-Participation Exercise for FY24.
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ChPT and the 1/N c expansion provide systematic frameworks for the strong interactions at low energy. A combined framework of both expansions has been developed and applied for baryons with three light-quark-flavors. The small scale expansion of the combined approach is identified as the ξ-expansion, in which the power counting of the expansions is linked according to O(p) = O(1/N c ) = O(ξ). The physical baryon masses as well as lattice QCD baryon masses for different quark mass masses are analyzed to O(ξ 3 ) in that framework. σ terms are addressed using the Feynman Hellmann theorem. For the nucleon, a useful connection between the deviation of the Gell-Mann-Okubo relation and the σ term σ 8N associated with the scalar density $\bar{u}u+\bar{d}d-2\bar{s}s$ is identified. In particular, the deviation from the tree level relation σ 8N = $\frac{1}{3}$(2m N -m Σ -m Ξ ), which gives rise to the so called σ-term puzzle, is studied in the ξ-expansion. A large correction non-analytic in ξ results for that relation, making plausible the resolution of the puzzle. Issues with the determination of the strangeness σ terms are discussed, emphasizing the need for lattice calculations at smaller m s for better understanding the range of validity of the effective theory. The analysis presented here leads to σ πN = 69(10) MeV and σ πΔ = 60(10) MeV.
Here, we show that SigAb is a metal stress-responsive ECF that appears unique to Acinetobacter species and distinct from RpoE. We combine promoter mutagenesis, motif scanning, and ChIP-seq to define the direct SigAb regulon, which consists of sigAb itself, the stringent response mediator, relA, and the uncharacterized small RNA, "sabS."
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Relative populations of vibration level and rotational temperature of nitrogen radical system
Precursor of emission from NH radicals in comets is hydrazine or hydrazine-type molecule
Near-UV bands of magnesium oxide photographed with concave grating spectrograph, using controlled atmosphere arc source
Hyperon-pion resonances in kaon-neutron interaction in carbon
Quantum mechanical potential energy curve of lowest normal state of diatomic helium computed in valence bond scheme, using 17-term wave function of Slater orbitals
Electric quadrupole transition in fourth positive system of CO observed in bands of electric dipole allowed transition
Test data summarized for pressure switch
Rotational intensity distribution of vacuum UV ABSORPTION spectrum bands of carbon monoxide arising through mixing of D state with neighboring states
Spectrum of bound and quasi-bound states of hydrogen-hydrogen scattering and resonance, using Schroedinger equation