We have found a new clue to the transition mechanism between optical high/X-ray off and optical low/X-ray on states of the LMC supersoft X-ray source RX J0513.9−6951. A sharp ∼ 1 mag drop is common to the CI Aql 2000 outburst. These drops are naturally attributed to cessation of optically thick winds on white dwarfs. A detailed light-curve analysis of CI Aql indicates that the size of a disk dr...

background drop-out (discontinuing treatment after the first visit) is one of the main causes of failure in obesity treatment. the aim of this study was to investigate the pattern of drop-out in overweight or obese outpatients in ahvaz, iran. material and methods a total of 575 overweight or obese individuals (female: 469, male: 106) aged 18 – 65 attending an outpatient dietician office for the...

Recently, high-resolution Chandra observations revealed the existence of very sharp features in the Xray surface brightness and temperature maps of several clusters (Vikhlinin et al., 2001). These features, called “cold fronts”, are characterized by an increase in surface brightness by a factor ∼> 2 over 10-50 kpc, accompanied by a drop in temperature of a similar magnitude. The existence of su...

We study heat transfer from a heated nanoparticle into surrounding fluid using molecular dynamics simulations. We show that the fluid next to the nanoparticle can be heated well above its boiling point without a phase change. Under increasing nanoparticle temperature, the heat flux saturates, which is in sharp contrast with the case of flat interfaces, where a critical heat flux is observed fol...

In this paper, we show that the temperature-induced performance drop seen in nanoscale CMOS circuitscan be tackled by powering the circuits with adaptively regulated voltage power supplies. Essentially, when temperature rises, the supply voltage will be bumped up to offset otherwise performance degradation. To avoid thermal over-drift as chip temperature exceeds its operation range, a voltage l...