A translational Lanchester damper is a device that adds damping to structure at point using series combination of viscous and mass. The problem in the practical realisation such stiffness required support mass, which changes dynamic behaviour device, introducing resonance frequency due interaction inertia forces. This vibration absorber. To achieve behaves broadly as rather than absorber, very ...

Abstract Designing vibrating systems is challenging due to component interaction. One approach reduce the resulting complexity top-down design where requirements on components are formulated such that overall system achieves goal. Previous work showed how derive quantitative and solution-neutral of a system, expressed as permissible ranges impedance. This adapts methodology practical use case p...

Lyα absorber correlations contain information about the underlying density distribution associated with a particular class of absorbers. As such, they provide an opportunity to independently measure the “bias” of the Lyman alpha forest, i.e. the relationship between H I column density and underlying dark matter density. In these proceedings we use hydrodynamic simulations to investigate whether...

We analyze a 137 ks exposure X-ray spectrum of the Seyfert 1 galaxy NGC 5548 obtained with the XMM-Newton Reflection Grating Spectrometer. Due to the long exposure time, the spectrum is of higher statistical quality than the previous observations of this AGN. Therefore, we detect for the first time in NGC 5548 inner-shell transitions from O III to O VI ions, and the Unresolved Transition Array ...

We present an XMM-Newton observation of NGC 7469, including studies of the X-ray and UV variability, 0.2−10 keV spectral continuum, Fe Kα emission line and the first-ever high-resolution X-ray spectrum of the soft X-ray warm absorber. We compare the properties of this X-ray warm absorber with the UV warm absorber as seen in a FUSE observation one year previously. The 0.2−10 keV spectral continu...

Lyα absorber correlations contain information about the underlying density distribution associated with a particular class of absorbers. As such, they provide an opportunity to independently measure the “bias” of the Lyman alpha forest, i.e. the relationship between H I column density and underlying dark matter density. In these proceedings we use hydrodynamic simulations to investigate whether...

Abstract A novel dynamic vibration absorber(DVA) model with negative stiffness and inerter-mass is presented analytically studied in this paper. The research shows there are still two fixed points independent of the absorber damping amplitude frequency curve primary system when contains inerter-mass. optimum ratio obtained based on fixed-point theory. In order to ensure stability system, it fou...

We have investigated the validity of our simulator. The validation item that we have already performed are summarized as follows. 1. Whether the energy loss distribution follows the Landau’s distribution. • thin absorber of Silicon 2. Whether the energy loss along per unit length follows the formula of Bethe-Bloch for protons. • thick absorber of Silicon • thick absorber of Lead 2 Landau’s dist...

We demonstrate a new analytical X-ray computed tomography technique for visualizing and quantifying the mass density of materials comprised of low atomic number elements with unknown atomic ratios. The mass density was obtained from the experimentally observed ratio of the imaginary and real parts of the complex X-ray refractive index. An empirical linear relationship between the X-ray mass att...