We carried out three-dimensional global resistive magnetohydrodynamic (MHD) simulations of the cooling instability in optically thin hot black hole accretion flows by assuming bremsstrahlung cooling. General relativistic effects are simulated by using the pseudo-Newtonian potential. Cooling instability grows when the density of the accretion disk becomes sufficiently large. We found that as the...

The well-known Carnahan-Starling (CS) equation of state (EoS) [1] for the hard sphere (HS) fluid was derived from a quadratic relation between integer portions virial coefficients, Bn, and their orders, n. Here we extend method to full coefficients Bn general D-dimensional case. We assume polynomial function (D-1)th order starting n=4 EoS are it. For rob (D=1) case, exact solution is obtained. ...

In Hard Disk Drives (HDD), it is necessary to decrease the Flying Height (FH) between the head and the disk (currently, FH is around 3-5 nm) so as to increase recording densities. Retaining the solid lubricant has become a difficult proposition owing to intermittent contact between the surfaces. ZTMD and Z are used as solid lubricant to lubricate these interfaces. In this paper, the behavior of...

Hard disk drives function perfectly satisfactorily when used in a stable environment, but in certain applications they are subjected to shock and vibration. During the work reported in this thesis it has been found that when typical hard disk drives are subjected lo vibration, data transfer failure is found to be significant at frequencies between 440Hz and 700Hz, at an extreme, failing at only...

Within digital forensics investigations, the term Live Response refers to all activities that collect evidence on live systems. Though Live Response in general alters the state of the suspect system, it is becoming increasingly popular because it can recover valuable information that is lost in normal investigations that power down a suspect computer and perform analysis on its hard disk image....

We introduce a racing model with multiple product generations, product innovation, spin-outs, and licensing. Industry conditions and innovation characteristics affect who wins the race and who markets the resulting product. Small firms market their innovations when they pioneer a new generation or improve quality in a young generation and license their innovations in mature generations. If old ...

The rotary electrostatic microactuators integrating optimally curved electrodes are proposed to enhance the actuating force-generation capability. In most of conventional type of electrostatic microactiators using rotary mode, the electrodes have not been rigorously evaluated in terms of optimality for the shape and simply have been adopted in a straight shape. As a result, two neighboring elec...

Computer hard drives often contain evidence that is vital to digital forensic investigations. However, an authenticated working copy or “forensic image” of a suspect hard drive must be created before any data can be analyzed. As the capacities of modern hard drives increase, the time taken to create a forensic image, let alone analyze the data, increases significantly. This paper investigates t...

We present a new model of accretion disk where the disk luminosity is entirely due to the reprocessing of hard radiation impinging on the disk. The hard radiation itself is emitted by a hot point source above the disk, that could be physically realized by a strong shock terminating an aborted jet. This hot source contains ultra-relativistic leptons scattering the disk soft photons by Inverse Co...