We present evidence that the outflowing UV absorbers in Seyfert 1 galaxies arise primarily in their inner narrow (emission) line regions (NLRs), based on similarities in their locations, kinematics, and physical conditions. 1) Hubble Space Telescope observations show that nearly all Seyfert galaxies have bright, central knots of [O III] emission in their NLRs with radii of tens of parsecs. Thes...

We present a study of the Lyα forest at z . 0.4 from which we conclude that at least 20% of the total baryons in the universe are located in the highly-ionized gas traced by broad Lyα absorbers. The cool photoionized low-z intergalactic medium (IGM) probed by narrow Lyα absorbers contains about 30% of the baryons. We further find that the ratio of broad to narrow Lyα absorbers is higher at z . ...

We present evidence that the outflowing UV absorbers in Seyfert 1 galaxies arise primarily in their inner narrow (emission) line regions (NLRs), based on similarities in their locations, kinematics, and physical conditions. 1) Hubble Space Telescope observations show that nearly all Seyfert galaxies have bright, central knots of [O III] emission in their NLRs with radii of tens of parsecs. Thes...

Analysis of the vibration reduction characteristics shock absorbers is crucial for engines. In this study, fractal theory was applied to contact surface an under-platform damper (UPD), and influence excitation force in same opposite directions on roughness studied. First, based geometry (FGT), characterization method a UPD proposed. Then, friction mechanical model rough established by combining...

The growth of the fleet rolling stock motor transport increases requirements for road safety, which is largely determined by operational reliability and technical condition components mechanisms chassis. In many countries, large-scale studies are being conducted related to problems improving quality, durability vehicles technological equipment based on repair kits, as well manufacturing assembl...

An elastomer is a polymer with the property of viscoelasticity, generally having notably low Young's modulus and high yield strain compared with other materials.  Elastomers, in particular rubbers, are used in a wide variety of products ranging from rubber hoses, isolation bearings, and shock absorbers to tires. Rubber has good properties and is thermal and electrical resistant. We used carbon ...

Flatfoot is a condition in which part or all of the soles feet do not form an arch (longitudinal arch) as normal so that appear flat and touch ground. This makes function shock absorbers support for body weight during activities, cannot work properly. greatly affects development components, including flexibility balance. Flexibility balance are needed when person active, especially at age 2-6 y...

The Ovi ion observed in quasar absorption line spectra is the most accessible tracer of the cosmic metal distribution in the low redshift (z < 0.5) intergalactic medium (IGM). We explore the nature and origin of Ovi absorbers using cosmological hydrodynamic simulations including galactic outflows with a range of strengths. We consider the effects of ionization background variations, non-equilib...

Linear vibration absorbers are a valuable tool used to suppress vibrations due to harmonic excitation in structural systems. Limited evaluation of the performance of nonlinear vibration absorbers for nonlinear structures exists in the current literature. The state of the art is extended in this work to vibration absorbers in their three major physical implementations: the mechanical vibration a...