The accretion disc around a rotating magnetic star (neutron star, white dwarf or T Tauri star) is subjected to periodic vertical magnetic forces from the star, with the forcing frequency equal to the stellar spin frequency or twice the spin frequency. This gives rise bending waves in the disc that may influence the variabilities of the system. We study the excitation, propagation and dissipatio...

In rotating biological contactors (RBC), the oxygen mass transfer coefficient (KLa) is often inadequately predicted by the available models. Hence, dimensional analysis based empirical models were developed for predicting KLa and the component of KLa due to turbulence (KLat) using data available in the literature. The overall oxygen transfer number (OTN) and its component due to turbulence (OTN...

By means of a highly accurate, multi-domain, pseudo-spectral method, we investigate the solution space of uniformly rotating, homogeneous and axisymmetric relativistic fluid bodies. It turns out that this space can be divided up into classes of solutions. In this paper, we present two new classes including relativistic core-ring and tworing solutions. Combining our knowledge of the first four c...

Bayley and Conway’s 1964 paper [1], motivated by shortcomings in industrial design methods and understanding, was one of the first investigations of flow and heat transfer in turbomachinery rotating disc cavities. At the time of the study, a theoretical or numerical treatment was considered intractable and so experiments were undertaken. These paved the way for a large body of further research ...

In this paper, the construction and operation of a measuring bench for vibration state rotating shaft evaluation measurement results are presented. The design was aimed at generated by excitation effects on shaft. effect imbalance position disc characteristics is shown in diagrams. It also observed that higher speeds plotted shows an irregular shape. This due to whole structure.

Jaw movement is analyzed as the action between two rigid components jointed together in a particular way, the movable mandible against the stabilized cranium. Jaw articulation distinguishes form most other synovial joints of the body by the coincidence of certain characteristic features. Its articular surfaces are not covered by hyaline cartilage as elsewhere. The two jointed components carry t...

The effects of strong gravity on the polarization of the Compton reflection from an X-ray illuminated accretion disc are studied. The gravitational field of a rotating black hole influences Stokes parameters of the radiation along the propagation to a distant observer. Assuming the lamp-post model, the degree and the angle of polarization are examined as functions of the observer’s inclination ...

We present the results of a multi-component kinematic model large sample RR Lyrae detected by $Gaia$. By imposing four-fold symmetry and employing $Gaia$ proper motions, we are able to infer behaviour velocity ellipsoid between $\approx3$ $\approx30$ kpc from centre Galaxy. detect presence two distinct components: dominant non-rotating halo-like population much smaller rotating disc-like popula...

The dynamics of two massive black holes in a rotationally supported nuclear disc of mass Mdisc = 10 8M⊙ is explored using N-Body/SPH simulations. Gas and star particles are co–present in the disc. Described with a Mestel profile, the disc has a vertical support provided by turbulence of the gas, and by stellar velocity dispersion. A primary black hole of mass 4 × 106M⊙ is placed at the centre o...

In-flight measurements are made of the translational accelerations and attitude motion of a hand-thrown flying disc using miniaturized accelerometers and other sensors and a microcontroller data acquisition system. The experiments explore the capabilities and limitations of sensors on a rapidly rotating platform moving in air, and illustrate several of the complex gyrodynamic aspects of Frisbee...