12,681 research outputs found
Residual stress evaluation in welded large thin-walled structures based on eigenstrain analysis and small sample residual stress measurement
A Modified Loading Method for Separating the Effect of Residual Stress on Fatigue Crack Growth Rate of Welded Joints
Tris(2-methylÂpiperidinium) tetraÂchloridoÂferrate dichloride
The asymmetric unit of the title salt, (C6H14N)3[FeCl4]Cl2, consists of a tetraÂhedral tetraÂchloroÂferrate anion, three independent 2-methylÂpiperidinium cations and two chloride ions. All the piperidine rings adopt chair conformations. In the crystal, the organic cations and the free chloride anions are linked into chains parallel to the a axis by N—H⋯Cl hydrogen bonds
Improved Analytic Solution of Black Hole Superradiance
The approximate solution of the Klein-Gordon equation for a real scalar field
of mass in the geometry of a Kerr black hole obtained by Detweiler
\cite{Detweiler:1980uk} is widely used in the analysis of the stability of
black holes as well as the search of axion-like particles. In this work, we
confirm a missing factor in this solution, which was first identified in
Ref.~\cite{Pani:2012bp}. The corrected result has strange features that put
questions on the power-counting strategy. We solve this problem by adding the
next-to-leading order (NLO) contribution. Compared to the numerical results,
the NLO solution reduces the percentage error of the LO solution by a factor of
2 for all important values of . Especially the percentage error is
in the region of . The NLO solution also
has a compact form and could be used straightforwardly.Comment: 5 pages, 3 figures, Accepted by PR
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