In order to solve the problems of limited installation space and strict additional quality, effects internal distributed nonlinear energy sinks (NES) considering optimal locations on a composite truss core sandwich plate are investigated in this paper. Choose five NESs here inset them different places suppress vibration plate, which is excited by half-wave shock. The coupled dynamic equations s...

The effect of commercial oxygen absorbers on sliced ham quality packaged in barrier film (OTR @ 60cc/m/da) under rigorous display conditions was investigated. Atmospheric pressure, vacuum, and CO2 back-flushed packaging methods were used. Color, microbial counts, lipid oxidation, and sensory odor were evaluated weekly over a period of 79 days in 10°C storage under fluorescent light. Ham contain...

We have discovered a correlation between the X-ray absorbing column densities within Seyfert galaxies and the relative alignment between the central engines and their host galactic disks. This correlation carries several implications for Seyfert unification models. (1) In addition to small-scale circumnuclear absorbers, there are absorbing systems associated with the host galactic plane that ar...

Metamaterial absorbers are photonic structures composed of an array of sub-wavelength metallic patterns. Results in literature are usually based on structures of nominal dimensions, despite the significant effect of fabrication tolerances on performance. This research aims to identify the main sources of uncertainty and to investigate their effect, notably that of an irregular surface quality (...

The resurgence of radical and populist parties has stimulated renewed discussions about the resilience parliamentary democracy in Europe. This work contributes to this debate by analysing extent which positive parliamentarism, prime minister’s dissolution powers, government’s power table votes confidence majority requirements for no serve as ‘shock absorbers’ moderating effect ideological polar...

Innovative additive manufacturing processes open new design opportunities, in the field of periodic cellular shock absorbers. In this work, an experimental campaign on lattice samples has been developed and carried out for intermediate velocities. The geometries used tests are result a sensitivity analysis conducted previous work. As complement to results provided by numerical model analysis, h...

The main aim of this article is to present the possibility assessing intensity impact vibrations on vehicle users. During operation, many factors can have impacts changes in characteristics car suspension, which affect passenger comfort. This paper presents results obtained from calculations based a mathematical model, as well measurements during laboratory tests. tests were performed vehicles ...

Purpose: The aim of this paper is to identify the root cause of the temporary decrease of the damping force during the early stage of the compression phase of the stroking cycle, the so called damping lag, to describe measures of the phenomenon and to present methods for optimizing the design towards minimizing this (negative) effect. Design/methodology/approach: Theoretical background is prese...

We present a complete catalogue of 27 O VI absorbers at low redshift (0.12 < z < 0.5) from a blind survey of 16 QSO echelle spectra in the HST/STIS data archive. These absorbers are identified based only upon matching line profiles and the expected doublet ratio between the λλ 1031, 1037 transitions. Subsequent searches are carried out to identify their associated transitions. Here we present a...