We revisit the properties of white dwarfs accreting hydrogen-rich matter by constructing steady-state models, in which hydrogen shell burning consumes hydrogen at the same rate as the white dwarf accretes it. We obtain such steady-state models for various accretion rates and white dwarf masses. We confirm that these steady models are thermally stable only when the accretion rate is higher than ...

Recent computational studies have simulated a mode of distributed premixed combustion where turbulent mixing plays a significant role in the transport of mass and heat near the reaction zone. Under these conditions, molecular transport processes play a correspondingly smaller role. A consequence of burning in this regime is that a change in the gas mixture composition can occur within the flame...

Two key reactions of hydrostatic nuclear burning in stars have recently been revised by new experimental data – the N(p, γ)O and 3α reaction rates. We investigate how much the new rates influence the evolution of low-mass, metal-poor and metal-free, stars and of an intermediate-mass star of solar-type composition. We concentrate on phases of helium ignition or thermally unstable helium burning....

background: the self-burning is one of the most painful methods of suicide. self-burning was performed influenced by various factors. this study is aimed to study self-burning event within women of javanrood and ravansar cities in kermanshah province and demographic characteristics of unsuccessful victims. methods: this study was a survey – descriptive. research area is javanrood and ravansar c...

conclusions based on the results of the present study, patients with bms had sleep disorders, which should be considered in the clinical evaluation and treatment planning of these patients. results the mean age of the subjects in the bms and control groups were 49.9 ± 11 and 48.5 ± 8.3 years, respectively. the prevalence rates of sleep disorders in the bms and control groups were 78% and 38.7%,...

Treatments using combinations of pelletized herbicides with prescribe burning were tested for planting site preparation on steep terrain (>35% slopes) in the Alabama Piedmont. Mixed forests of southern pines, oaks, and hickories occupied areas before logging. Three burning treatments (no-burn, preand post-harvest) were applied randomly among three 4-acre major plots at each of three study locat...

Turbulent combustion is three-dimensional. Turbulence in a Type Ia supernova is driven on large scales by the buoyancy of burning products. The turbulent cascade penetrates down to very small scales, and makes the rate of deflagration independent of the microphysics. The competition between the turbulent cascade and the freeze-out of turbulent motions due to stellar expansion determines the lar...

Semi-solid processing (SSP) is a popular near-net-shape forming technology for metals, while its application is still limited in titanium alloy mainly due to its low formability. Recent works showed that SSP could effectively enhance the formability and mechanical properties of titanium alloys. The processing parameters such as temperature and forging rate/ratio, are directly correlated with th...

Neutron stars in close binary star systems often accrete matter from their companion stars. Thermonuclear ignition of the accreted material in the atmosphere of the neutron star leads to a thermonuclear explosion which is observed as an X-ray burst occurring periodically between hours and days depending on the accretion rate. The ignition conditions are characterized by a sensitive interplay be...