Regional body-wave tomography, also called ACH tomography, is the inversion of relative traveltime residuals of teleseismic body waves measured at regional networks. We analyse the characteristics of the finite-frequency Fr´echet kernels for P and S waves for this kind of tomography. Using a simplified geometry enables us to use the complete Green’s function in the expression of the Fr´ech…

We propose natural inflation from the heterotic string theory on the “Swiss-Cheese” Calabi– Yau manifold with multiple U(1) magnetic fluxes. Such multiple U(1) magnetic fluxes stabilize the same number of the linear combination of the universal axion and Kähler axions, and one of the Kähler axions is identified as the inflaton. This axion decay constant can be determined by the size of…

The climate warming trend appears to be evident with an increasing frequency of drought events in Shaanxi Province of China, which may have contributed to an increase in outbreaks of the English grain aphid, Sitobion avenae (Fabricius). To explore the potential effects of water-deficit stress on aphid outbreak risks, clones of S. avenae were collected from semi-arid and moist areas of Shaanxi. …

We investigate the effects of triple-α and 12C(α, γ )16O reaction rates on the production of supernova yields for a massive star of 25 M. We combine the reaction rates to examine the rate dependence, where the rates are considered to cover the possible variation of the rates based on experiments on the earth and on theory. We adopt four combinations of the reaction rates from tw…

Inversions for the full slip distribution of earthquakes provide detailed models of earthquake sources, but stability and non-uniqueness of the inversions is a major concern. The problem is under determined in any realistic setting, and significantly different slip distributions may translate to fairly similar seismograms. In such circumstances, inverting for a single best model may become ove…

We develop a theoretical framework to investigate the two-body composite structure of a resonance as well as a bound state from its wave function. For this purpose, we introduce both one-body bare states and two-body scattering states, and define the compositeness as a fraction of the contribution of the two-body wave function to the normalization of the total wave function. Writing down explic…

We study the structures of 9,10Be and 10B with the tensor-optimized shell model (TOSM) using an effective interaction based on the bare nucleon–nucleon interaction AV8. The tensor correlation is treated in TOSM using the full space of 2p2h configurations including high-momentum components. The short-range correlation is treated with the unitary correlation operator method. It is found that t…

This paper proposes an improvement on the scattering-integral (SI) approach for acoustic frequency-domain full waveform inversion (FWI) based on the individual Born kernels. The main development is a method for calculating the steepest-descent direction and the pseudo-Newton direction by vector operations with definite physical meaning, without needing to store the huge Fr´echet kernels in mem…

By employing the angular momentum projection technique, we propose a method to reliably calculate the quantum spectrum of nuclear collective rotation. The method utilizes several cranked mean-field states with different rotational frequencies, which are superposed in the sense of configuration mixing or the generator coordinate method after performing the projection; the idea was originally sug…

Knowledge on movement and spatial patterns of insect pest populations among preferred hosts aids in the development of effective pest management strategies. In this study, we quantified the spatiotemporal dynamics of the invasive brown marmorated stink bug, Halyomorpha halys (Sta� l 1855), in relation to field corn, Zea mays L., and soybean, Glycine max (L.), crop phenology.We also examine…